| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 375320000 | Amplitude modulation | 79 |
| 20110206164 | SIGNAL SPACE EXPANSION FOR A 16 QAM SCHEME - The invention relates to methods for transmitting and receiving a data bit stream in a communication system using a 16-QAM constellation. Further, an apparatus for performing the methods is provided. To provide a modulation and coding scheme using a signal space expansion and 16-QAM which improves the bit-error rate in comparison to QPSK modulated signals and still provides the possibility to implement coders and decoders with low complexity the invention suggests the use a 16-QAM constellation with specially selected mapping rules together with repetition coding (signal space expansion) and interleaving of the data stream to be transmitted. | 08-25-2011 |
| 20130044837 | RECEIVER AND INTEGRATED AM-FM/IQ DEMODULATORS FOR GIGABIT-RATE DATA DETECTION - Provision of gigabit-rate data transmission over wireless radio links, using carrier frequencies in the millimeter-wave range (>30 GHz). More specifically, a circuit for detection of amplitude-shift keyed (ASK) or other amplitude modulations (AM) which can be easily incorporated into an integrated circuit receiver system is described, making the receiver capable of supporting both complex IQ modulation schemes and simpler, non-coherent on-off or multiple-level keying signals. Several novel radio architectures are also described which, with the addition of a frequency discriminator network, have the capability of handling frequency shift keyed (FSK) or other frequency modulations (FM), as well as AM and complex IQ modulation schemes. These radio architectures support this wide variety of modulations by efficiently sharing detector hardware components. Disclosed herein are architecture for supporting both quadrature down-conversion and ASK/AM, ASK/AM detector circuit details, AM-FM detector architecture, and an AM-FM/IQ demodulator system and FSK/FM detector circuit details. | 02-21-2013 |
| 20100074373 | BROADCAST RECEIVER AND CHANNEL SEARCHING METHOD USING THE SAME - Disclosed is a broadcast receiver. The broadcast receiver comprises a signal receiver for tuning and outputting a Q channel of a digital broadcasting signal, a demodulator for demodulating a signal of the received channel and checking a lock state M or an unlock state of a gain control signal and a timing control signal of the channel, and a demodulation controller for controlling o an operation of the demodulator and detecting a lock state of the channel based on the lock state of the gain control signal and the timing control signal. | 03-25-2010 |
| 20090296856 | CARRIER PHASE SYNCHRONIZATION SYSTEM FOR IMPROVED AMPLITUDE MODULATION AND TELEVISION BROADCAST RECEPTION - Systems and methods are described for carrier phase synchronization for improved AM and TV broadcast reception. A method includes synchronizing the phase of a carrier frequency of a broadcast signal with the phase of a remote reference frequency. An apparatus includes a receiver to detect the phase of a reference signal; a phase comparator coupled to the reference signal-phase receiver; a voltage controlled oscillator coupled to the phase comparator; and a phase-controlled radio frequency output coupled to the voltage controlled oscillator. | 12-03-2009 |
| 20100046673 | RECEIVER FOR ESTIMATING SIGNAL MAGNITUDE, NOISE POWER, AND SIGNAL-TO-NOISE RATIO OF RECEIVED SIGNALS - A method and apparatus for estimating attributes of a received signal that includes a plurality of transmitted signals are provided. The amplitude of the received signal is estimated by performing a method of demodulation based on known signal information. The amplitude of an M-ary quadrature amplitude modulated signal is estimated based upon known or ascertainable phase information regarding a plurality of transmitted symbols. The amplitude of a q-ary amplitude shift keyeing signal is estimated based upon known or ascertainable magnitude information regarding a plurality of transmitted symbols. Statistical information is also used for amplitude estimation. | 02-25-2010 |
| 20090154600 | QRD-QLD searching based sphere detector for MIMO receiver - An apparatus includes a receiver configurable to receive signals from y pairs of antennas, where y is greater than one, and where the received signals convey coded bits of information. The apparatus further includes a detection block that includes a plurality of search modules configurable to process signals received from pairs of the antennas in parallel to find partial Euclidian distances and determine valid partial candidates for individual antennas; and a plurality of sort modules configurable to sort the valid partial candidates to find M best partial candidates to be combined into M | 06-18-2009 |
| 20120183100 | Detector Circuit, Transponder and Method for Detecting Signal Amplitudes - A transponder circuit for receiving and processing an ASK signal having modulated communication information is provided. The transponder circuit includes a data receiver configured to receive the ASK signal. A reference clock extractor coupled to the data receiver is configured to extract a reference clock signal from the ASK signal. An amplitude determination unit is coupled to the data receiver and the reference clock extractor, and is configured to determine at least one amplitude value of the received ASK signal in at least one clock cycle of the extracted reference clock signal based on the extracted reference block. A processing unit, which is coupled to the amplitude determination unit, processes the amplitude value such that the communication information is retrieved. | 07-19-2012 |
| 20130101071 | SIGNAL MONITORING PLATFORM - Aspects of the disclosure relate to signal monitoring at edge of a network domain in a network. A monitoring device can evaluate communication quality of information streams in downstream frequency channels, and operation conditions in a telecommunication network. In one aspect, communication quality can be evaluated at the physical layer level or at a higher-layer level containing payload data. In response to an operation issue, the monitoring device can transmit a notification to a node of a distribution platform of the telecommunication network. | 04-25-2013 |
| 20090232255 | QAM SYMBOL SLICING METHOD AND APPARATUS - A method for slicing a symbol in a QAM digital demodulator, includes acquiring a digital integer value by sampling a symbol signal in an in-phase coordinate or a quadrature-phase coordinate; and extracting a symbol bit sequence in the in-phase coordinate or the quadrature-phase coordinate from a whole bit sequence of the digital integer value by using an LSB thereof. Further, a symbol slicer for detecting a QAM symbol, includes digital sampling units, each of which acquires a digital integer value by sampling a symbol signal in an in-phase coordinate or a quadrature-phase coordinate; and a symbol bit sequence extracting unit that extracts a symbol bit sequence in the in-phase coordinate or the quadrature-phase coordinate from a whole bit sequence of the digital integer value by using an LSB thereof. | 09-17-2009 |
| 20110293044 | Method and System for Channel Estimation in a Spatial Multiplexing MIMO System - Aspects of a method and system for channel estimation in a SM MIMO communication system may comprise receiving a plurality of spatially multiplexed communication signals from a plurality of transmit antennas. A plurality of baseband combined channel estimates based on phase rotation may be generated in response to the received plurality of spatially multiplexed communication signals. An estimate of the channel matrix may be determined based on the baseband combined channel estimates. A plurality of amplitude and phase correction signals may be generated in response to receiving the estimate of the channel matrix. An amplitude and a phase of at least a portion of the received plurality of spatially multiplexed communication signals may be adjusted based on the generated plurality of amplitude and phase correction signals, respectively. | 12-01-2011 |
| 20100142649 | SYSTEM AND METHOD OF GENERATING SOFT BITS - A receiver receives a received signal from a communication link, the received signal comprising a stream of symbols modulated onto a carrier, each of the stream symbols selected from a constellation of symbols to represent a plurality of encoded data bits. The receiver comprises a demodulator to produce a stream of received symbols derived from the received signal; a channel decoder to produce a received stream of data bits derived from the stream of received symbols; and a memory device to store information related to the plurality of symbols in the constellation. For each of the symbols in the stream of received symbols, the demodulator: determines which of the plurality of symbols in the constellation is a respective closest symbol to that received symbol; identifies a respective nearest neighbor symbol for each data bit represented by the closest symbol for that received symbol based on the information stored in the memory device; and for each data bit represented by the respective closest symbol for that received symbol, subtracts the distance between the respective closest symbol and that received symbol from the distance between the respective nearest neighbor symbol and that received symbol in order to produce respective soft bits for that received symbol. | 06-10-2010 |
| 20090154599 | Apparatus and method for detecting communications from multiple sources | 06-18-2009 |
| 20100119010 | Control Modules - A circuit is provided comprising detector circuitry, calculating circuitry, and determining circuitry. The detector circuitry is figured to generate an I data signal magnitude value of a sampled I data signal and a Q data signal magnitude value of a sampled Q data signal. The calculating circuitry is configured to calculate a phase shift angle φ | 05-13-2010 |
| 20100195768 | VITERBI EQUALIZATION WITH DETECTION OF THE NEAREST CONSTELLATION POINTS FOR STAGE REDUCTION - The device is used for decoding convolution-encoded reception symbols. In this context, transmission data are modulated with a modulation scheme to form symbols, which are encoded with a transmission filter to form convolution-encoded transmission symbols. A convolution-encoded transmission symbol contains components of several symbols arranged in time succession. These transmission symbols are transmitted via a transmission channel and received as reception symbols. The Viterbi decoder decodes the reception symbols by use of a modified Viterbi algorithm. Before running through the Viterbi decoder, the reception symbols are processed by a state-reduction device, which determines additional items of information relating to possible consequential states of the decoding independently of the decoding through the Viterbi decoder in every state of the decoding. The state-reduction device uses the additional items of information to restrict the decoding through the Viterbi decoder to given consequential states. | 08-05-2010 |
| 20090257529 | LOW POWER, INTEGRATED RADIO TRANSMITTER AND RECEIVER - A low power (optionally, self-powered) integrated transceiver using on-chip antennas is provided. The transmitter and receiver utilize phase-locked loops (PLLs) which initially, in a closed-loop state, pre-tune (i.e. phase-lock) voltage controlled oscillators (VCOs) before opening the loops to allow them to transmit and receive data. The TX, in the opened-loop state, disables the loop components while (FM) modulating the VCO. The RX, in the opened-loop state, injection-locks the VCO with the incoming (FM) modulated signal while the remaining loop components serve to demodulate the signal. For both the TX and RX an integrated antenna can be used and, advantageously, the TX comprises a dual purpose inductor which functions as both an inductor in the voltage-controlled oscillator (i.e. in the resonant tank thereof) and the integrated antenna. | 10-15-2009 |
| 20090141830 | RECEIVER AND METHOD FOR RECEIVING WIRELESS SIGNALS - A receiver and method for receiving wireless signal are characterized in that a multi-branch correcting and switching module ( | 06-04-2009 |
| 20100278284 | METHOD AND SYSTEM FOR SYMBOL DETECTION USING SUB-CONSTELLATIONS - Systems and methods for symbol detection using sub-constellations are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a processing unit configured to process received chips into received symbols for a plurality of users, a first detection unit configured to detect first components of user symbols for the plurality of users based on the received symbols and a computation unit configured to compute a portion of the received symbols due to the first components of the user symbols. The apparatus further comprises a second detection unit configured to detect second components of the user symbols based on the received symbols with the computed portion removed and a combining unit configured to detect the user symbols by combining the first components of the user symbols with the respective second components of the user symbols. | 11-04-2010 |
| 20090310715 | RECEIVER AND METHOD FOR PROCESSING RADIO SIGNALS USING SOFT PILOT SYMBOLS - A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16QAM or 64QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols. | 12-17-2009 |
| 20080225988 | LOW NOISE LOGARITHMIC DETECTOR - A logarithmic detector circuit including a drive circuit to receive a modulated input signal and generate a buffered modulated signal, a signal shaping circuit coupled to the drive circuit and configured to shape a voltage range of the buffered modulated signal to generate a shaped modulated signal, and a detecting circuit to detect the shaped modulated signal to generate an output signal substantially proportional to a logarithm of an amplitude of the modulated input signal. | 09-18-2008 |
| 20120069935 | SYMBOL-LEVEL COMBINING FOR MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) SYSTEMS WITH HYBRID AUTOMATIC REPEAT REQUEST (HARQ) AND/OR REPETITION CODING - Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors from the same transmitted vector. The symbols of the received signal vectors are combined, forming a combined received signal vector that may be treated as a single received signal vector. The combined signal vector is then decoded using a maximum-likelihood decoder. In some embodiments, the combined received signal vector may be processed prior to decoding. Systems and methods are also provided for computing soft information from a combined signal vector based on a decoding metric. Computationally intensive calculations can be extracted from the critical path and implemented in preprocessors and/or postprocessors. | 03-22-2012 |
| 20100002809 | PHY sub-channel processing - Physical layer (PHY) sub-channel processing. A soft symbol decision stream is arranged into a number of sub-channels to reduce substantially the processing performed within a communication receiver on data that is not intended for that communication receiver. In other embodiments, a predetermined approach is employed to arrange the soft symbol decision stream into one or more frames; each frame may have one or more soft symbol blocks; and each soft symbol block may have one or more symbols. Each of the soft symbol blocks, within a frame, may be assigned to a sub-channel. Only the soft symbol blocks that contain information destined for the communication receiver need be decoded. Only the sub-channel that includes these soft symbol blocks, destined for this communication receiver, need be decoded. The soft symbol blocks not within the sub-channel may be discarded thereby recovering some of the processing capabilities of the communication receiver. | 01-07-2010 |
| 20100002808 | SYSTEMS AND METHODS FOR PERFORMING SISO DETECTION IN A WiMAX ENVIRONMENT - In accordance with some embodiments, a communication system is described that comprises a soft-output detector configured to receive a transmit signal and output reliability information regarding the received signal. In accordance with such embodiments, the detector comprises a symbol combiner configured to operate in both a repetition mode and a non-repetition mode, wherein repetition mode comprises receiving a plurality of signals for the transmit signal. | 01-07-2010 |
| 20090316835 | POWER SAVINGS IN HIERARCHICALLY CODED MODULATION - A wireless communication apparatus in a hierarchically coded modulation system can use error control mechanisms generated during decoding of base layer information to predict a probability of successful demodulation of enhancement layer information. Performance in the demodulation of the base layer correlates to performance in the demodulation of the enhancement layer. The receiver can determine whether to attempt demodulation of temporally correlated enhancement layer data based in part on the predicted probability of success. If the receiver determines not to demodulate the enhancement layer, the receiver can power down the enhancement layer demodulator, or otherwise minimize the power expended in the enhancement layer demodulator. | 12-24-2009 |
| 20080310551 | Decoder for 4QAM-NR and method thereof - A 4QAM-NR decoder and decoding method are disclosed. The 4QAM-NR decoder, obtains original data corresponding to receiving data received by a receiving terminal. The 4QAM-NR decoder comprises a determining device, an improving device and a corresponding device. The determining device provides a determining method to determine whether the receiving data is improved or not. The improving device improves the receiving data. The corresponding device obtains the approximate original data corresponding to the receiving data. | 12-18-2008 |
| 20090110118 | ADAPTIVE DEINTERLEAVER MEMORY ALLOCATION - A receiver for use in a wireless network comprising a communications channel and a method of allocating deinterleaver memory usage in the receiver, wherein the receiver comprises a processor adapted to organize subchannels of the communications channel and set a number (N) of data bits per soft decision, wherein the soft decision is represented by N data bits; an address decoder adapted to decode the subchannels; a demapper adapted to receive QAM symbols and demap the QAM symbols to soft decisions; a deinterleaver adapted to perform deinterleaving on the soft decisions, wherein the deinterleaver comprises a memory component having a storage size that is a function of the number (N) of bits per soft decision; and a Viterbi decoder adapted to decode the deinterleaved soft decisions. | 04-30-2009 |
| 20100296608 | METHOD AND ARRANGEMENT RELATING TO RADIO SIGNAL TRANSMISSIONS - The present invention aims to provide a method for fast and exact ML low-complexity demodulation in for example MIMO systems. The present invention relates to a method and arrangement for processing signals, especially a Maximum Likelihood (ML) demodulation of Quadrature Amplitude Modulation (QAM) signals, in a digital communications system, having a number of transmit antennas transmitting n | 11-25-2010 |
| 20110129038 | RADIO COMMUNICATION METHOD, RADIO TRANSMITTING APPARATUS, AND RADIO RECEIVING APPARATUS - A duplicating section duplicates a bit sequence to be input, and a 16 QAM section modulates a bit sequence of a duplicating source to form a symbol, a 16 QAM section modulates the duplicated bit sequence to form a symbol, an S/P section parallel converts the symbol sequence input in series, an S/P section parallel converts the symbol sequence input in series, and an IFFT section | 06-02-2011 |
| 20090034658 | Self-mixing Receiver and Forming Method Thereof - This invention is primarily a circuit structure of self-mixing receiver, and the methodology of circuit structure is described as follows. The first stage is a high input impedance voltage amplifier utilized to amplify the received RF carrier signal from the antenna. Besides, there are no any inductors required. The second stage is a multi-stage amplifier to amplify the output signal of first stage to rail-to-rail level, which is quite the same with supply voltage. The third stage is a mixer adopted to lower the signal frequency. The fourth stage is a digital output converter, which is proposed to demodulate the electric signals and convert the demodulated signal to digital signal. | 02-05-2009 |
| 20090213964 | RADIO DETECTION DEVICE AND METHOD - A radio detection device includes two or more reception antennas, for detecting a detecting object by a mono-pulse method; the radio detection device including: a variable gain unit for discretely changing respective signal intensity of a difference signal and a sum signal of each reception signal received by the two or more reception antennas; an A/D conversion unit for performing A/D conversion process on the difference signal or the sum signal, the difference signal or the sum signal having the signal intensity changed by the variable gain unit; an angle calculating portion for calculating an angle by the mono-pulse method using the difference signal and the sum signal after the A/D conversion process by the A/D conversion unit; and a control unit for performing a control of individually switching a conversion magnification of the signal intensity by the variable gain unit with respect to the difference signal and the sum signal. | 08-27-2009 |
| 20100172444 | METHOD FOR DIGITAL WIRELESS COMMUNICATIONS - In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established. | 07-08-2010 |
| 20110051851 | DEMODULATION USING SERIAL LOCALIZATION WITH INDECISION - A receiver includes a constellation processing module and a plurality of demodulation stages. The constellation processing module groups points of a constellation associated with a transmitted signal into a plurality of subsets, were at least two adjacent ones of the subsets have one or more common constellation points so that the at least two adjacent subsets overlap. The constellation processing module also determines a centroid-based value for each of the subsets of constellation points and groups the centroid-based values into one or more sets. Each of the demodulation stages except for the last demodulation stage localizes a search for a final symbol decision using the set of centroid-based values input to or selected by the demodulation stage as constellation points. The last demodulation stage determines the final symbol decision using the subset of constellation points input to or selected by the last demodulation stage. | 03-03-2011 |
| 20120134445 | RECEIVING APPARATUS AND RECEIVING METHOD - A duplicating section duplicates a bit sequence to be input, and a 16QAM section modulates a bit sequence of a duplicating source to form a symbol, a 16QAM section modulates the duplicated bit sequence to form a symbol, an S/P section parallel converts the symbol sequence input in series, an S/P section parallel converts the symbol sequence input in series, and an IFFT section | 05-31-2012 |
| 20100014612 | QAM DEMODULATION - A method of demodulating a signal on which is modulated, using a quadrature amplitude modulation scheme, a plurality of information symbols, the method including: determining at least one QAM detection threshold corresponding to one or more of said information symbols; and demodulating each information symbol on the basis of at least one respective QAM detection threshold. | 01-21-2010 |
| 20120243639 | DATA COMMUNICATION DEVICE, AIR PRESSURE MONITORING SYSTEM USING THEREOF, AND DATA COMMUNICATION METHOD - A data communication device includes: an antenna resonance circuit; a detection circuit; an arithmetic processing device; and a first switch. The antenna resonance circuit receives a signal in the ASK (Amplitude Shift Keying) format. The detection circuit demodulates a digital baseband signal based on the reception signal. The arithmetic processing device detects an appearance time of an edge in the demodulated digital baseband signal based on a preamble part of the reception signal. The first switch short-circuits both end of the antenna resonance circuit at first timing in synchronization with the appearance time of the edge. | 09-27-2012 |
| 20100054365 | Multilevel Cluster-based MIMO Detection Method and MIMO Detector Thereof - A MIMO detection method for a receiver in a MIMO system using N-QAM for modulation, the MIMO detection method including generating a plurality of symbol vector sets and a plurality of search radiuses, selecting a candidate symbol vector set corresponding to a highest level of a multilevel structure of N-QAM constellation, generating a search space corresponding to a lower level of the multilevel structure of N-QAM constellation according to the selected candidate symbol vector set, confirming which level the search space corresponds to, and generating a detection signal according to the search space when the level of the search space is the lowest level of the multilevel structure of the N-QAM constellation. | 03-04-2010 |
| 20100158157 | ASK DEMODULATOR, COMMUNICATION MODULE, COMMUNICATION DEVICE, AND ASK DEMODULATION METHOD - According to one embodiment, an ASK demodulator includes a rectifier, a first low-pass filter, a second low-pass filter, a comparator, and a threshold controller. The rectifier rectifies an ASK signal. The first low-pass filter outputs a signal corresponding to an envelope curve output from the rectifier. The second low-pass filter outputs an integrated signal of the signal output from the first low-pass filter. The comparator detects an output logic in accordance with comparison between the signal output from the first low-pass filter and a threshold obtained by adding a predetermined hysteresis width to the integrated signal output from the second low-pass filter. The threshold controller controls the threshold by setting the predetermined hysteresis width based on a direct current offset voltage caused by element dispersions of the comparator. | 06-24-2010 |
| 20110051852 | JOINT DEMODULATION AND INTERFERENCE SUPPRESSION USING SERIAL LOCALIZATION WITH INDECISION - A receiver includes a constellation processing module and a multi-stage demodulator having a plurality of non-final demodulation stages and a final demodulation stage. The constellation processing module derives a set of centroid-based values from subsets of constellation points associated with a plurality of transmitted signals for input to each of the non-final demodulation stages. Each of the non-final demodulation stages demodulates a group of signals input to the non-final demodulation stage using the set of centroid-based values as constellation points and suppresses residual interference associated with using the set of centroid-based values as constellation points for signal demodulation. The final demodulation stage demodulates a group of modified signals input to the final demodulation stage using the subset of constellation points input to the final demodulation stage to determine a final symbol decision for the plurality of transmitted signals. | 03-03-2011 |
| 20080247490 | Receiver For Amplitude-Modulated Signals - In a receiver, a synchronization circuit (MIX | 10-09-2008 |
| 20110164704 | Amplitude Modulation Demodulating Circuit and Method Thereof - An amplitude modulation (AM) demodulating circuit applied to a radio frequency identification (RFID) system attenuates carrier signals by a notch filter to increase a signal-to-carrier ratio and to reduce complexity and cost of circuit design. The AM demodulating circuit includes an envelope detector, a notch filter, a low-pass filter, and a comparing circuit. The envelope detector performs envelope detection on an AM signal modulated by a carrier frequency to generate an envelope signal. The notch filter filters the envelope signal to generate a first filtered signal, and a zero point of the notch filter corresponds to the carrier frequency of the AM signal. The low-pass filter filters the first filtered signal to generate a second filtered signal, and the carrier frequency of the AM signal corresponds to a stop band of the low-pass filter. The comparing circuit converts the second filtered signal to a digital signal according to a level value. | 07-07-2011 |
| 20110188613 | Compact pulse shaping for QM-MSK and PAM/QAM reception - Compact pulse shape partial response (CPS PR) signaling is developed for trellis based signals like QM-MSK, and for PAM/QAM type signals to improve the performance to bandwidth tradeoff. Compact pulse shaped signals are partial response signals that employ a very short pulse shaping filter and use Viterbi decoding to optimally detect the CPS signal in presence of its inherent inter-symbol interference. The CPS filters considered herein have much shorter impulse response than the well-known raised cosine (RC) filter. There is no need to equalize the received signal to eliminate ISI or to allow a fixed amount of ISI between received signal samples as sampled at the symbol rate as is common in partial response maximum likelihood (PRML) systems. Numerical results indicate that CPS QM-MSK and CPS QAM provides between several dB of gain, depending on constellation size, over PR-CPM and RC QAM, when compared at a given value of bandwidth, i.e., B | 08-04-2011 |
| 20120307942 | APPARATUS AND METHOD FOR SOFT DEMAPPING - Provided is a soft demapping apparatus that may detect a log likelihood ratio (LLR) value of a quadrature amplitude modulation (QAM) signal, using a shifted table scheme, may designate a sub-region of the QAM signal corresponding to bit information that is obtained by decoding the LLR value, and may calculate an LLR value of other bit information included in the designated sub-region. | 12-06-2012 |
| 20120307941 | RADIO RECEIVER, METHOD OF CALIBRATING RADIO RECEIVER, METHOD OF CORRECTING TIME-INDUCED DEVIATION IN RADIO RECEIVER, AND RADIO BASE STATION APPARATUS - A radio receiver includes a signal divider that divides an intermediate frequency signal obtained by converting a frequency of a radio frequency signal received at an analog reception circuit, into a plurality of signal fragments based on an amplitude, and outputs the signal segments; and a plurality of analog to digital converters that perform an analog to digital conversion on the respective signal fragments divided by the signal divider, and output the signal fragments toward a digital reception circuit. | 12-06-2012 |
| 20100189196 | AMPLITUDE SHIFT KEYED (ASK) DEMODULATION PATTERN AND USE IN RADIO FREQUENCY IDENTIFICATION (RFID) - A demodulation circuit for an Amplitude Shift Keyed (ASK) modulated signal includes an envelope detector, an alternating voltage amplifier, a differentiator circuit, and a comparator having a hysteresis connected in series. The envelope detector produces an envelope signal from the received ASK signal. The amplifier blocks the DC component of the envelope signal and amplifies AC components of the envelope signal to obtain a steeper slope of the rising and falling edges. The differentiator circuit then processes the transition edges to provide a differentiated signal having positive and negative electrical pulses. The comparator converts the pulses into a binary data stream which corresponds to the transmitted data stream. The combination of the differentiated signal and comparator having a hysteresis enables better stability and sensitivity of the ASK demodulation circuit. | 07-29-2010 |
| 20080292024 | AMPLITUDE-SHIFT-KEYING (ASK) RADIO-FREQUENCY (RF) SIGNAL DECODING DEVICE AND METHOD THEREOF - An amplitude-shift-keying radio-frequency (ASK RF) signal decoding method includes separating a low frequency and a high frequency from an ASK RF signal, which includes a pause section and a non-pause section, generating a divided signal by dividing the high frequency signal, counting the divided signal for the non-pause section of the low frequency signal, and decoding the ASK RF signal based on a result of the counting. | 11-27-2008 |
| 20100172443 | SYSTEMS AND METHODS OF CLASSIFYING AND DECODING WIRELESS SIGNALS - Systems and methods of classifying and decoding wireless signals are disclosed. A receiver may receive wireless signals from multiple transmitters. The receiver may use sphere decoding to classify the wireless signals (e.g., determine the modulation scheme of the wireless signals) and decode the wireless signals (e.g., determine the symbol and/or symbols transmitted using the wireless signals). | 07-08-2010 |
| 20090185640 | DEMODULATION CIRCUIT, DIGITAL MICROWAVE SYSTEM AND DEMODULATION METHOD - A demodulation circuit, a digital microwave system including the demodulation circuit, and a signal demodulation method are provided. The demodulation circuit includes a first circuit, a second circuit, a third circuit, and a fourth circuit connected in turn. The fourth circuit includes a pulse counting unit and a data decision unit connected in turn. The signal demodulation method includes: performing bandpass filtering on input signals; increasing gains of the bandpass filtered signals; extracting pulse signals are extracted from the gain-increased signals; counting the extracted pulse signals; filtering the pulse signals having counting values falling outside of a predetermined range, and outputting the filtered pulse signals. | 07-23-2009 |
| 20110090990 | DEMODULATION APPARATUS, DEMODULATION METHOD, AND ELECTRONIC DEVICE - Disclosed herein is a demodulation apparatus including: an operation determination block configured to determine whether the demodulation apparatus operates as part of either a first device or a second device with which the demodulation apparatus communicates, the first device being configured to ASK-modulate and transmit data, the second device being configured to load-modulate and transmit data; and first and second demodulation control blocks. | 04-21-2011 |
| 20120008720 | AMPLITUDE-SHIFT-KEYING (ASK) RADIO-FREQUENCY (RF) SIGNAL DECODING DEVICE AND METHOD THEREOF - An amplitude-shift-keying radio-frequency (ASK RF) signal decoding method includes separating a low frequency and a high frequency from an ASK RF signal, which includes a pause section and a non-pause section, generating a divided signal by dividing the high frequency signal, counting the divided signal for the non-pause section of the low frequency signal, and decoding the ASK RF signal based on a result of the counting. | 01-12-2012 |
| 20120027129 | DEMODULATION CIRCUIT, DIGITAL MICROWAVE SYSTEM AND DEMODULATION METHOD - A demodulation circuit, a digital microwave system including the demodulation circuit, and a signal demodulation method are provided. The demodulation circuit includes a first circuit, a second circuit, a third circuit, and a fourth circuit connected in turn. The fourth circuit includes a pulse counting unit and a data decision unit connected in turn. The signal demodulation method includes: performing bandpass filtering on input signals; increasing gains of the bandpass filtered signals; extracting pulse signals are extracted from the gain-increased signals; counting the extracted pulse signals; filtering the pulse signals having counting values falling outside of a predetermined range, and outputting the filtered pulse signals. | 02-02-2012 |
| 20120063549 | SIGNAL RECEIVING APPARATUS, SIGNAL RECEIVING METHOD AND SIGNAL RECEIVING PROGRAM - A signal receiving apparatus has: a radius identifying section configured to identify a radius representing a distance from an origin on an IQ plane of signal points each corresponding to a symbol obtained from a received signal modulated by adoption of an APSK modulation method; and a parameter outputting section configured to output a control parameter related to a demodulation or decoding process of the received signal on the basis of the identified radius. | 03-15-2012 |
| 20120106678 | METHOD AND APPARATUS TO IMPROVE ACQUISITION OF A QUADRATURE AMPLITUDE MODULATED (QAM) SIGNAL HAVING A FREQUENCY OFFSET - A method and apparatus are described that result in an improved acquisition of a received communication signal containing a large frequency offset. The method and apparatus raises a derotated sequence of data to a power of an integer provide a sinusoidal spectral component. The method and apparatus determines a cross product based upon the sinusoidal spectral component to provide a phase error. The method and apparatus determines an oscillator signal based upon the phase error. The method and apparatus adjusts the received communication signal based upon the oscillator signal to compensate for the large frequency offset to provide the derotated sequence of data. | 05-03-2012 |
| 20120155574 | RECEIVER AND METHOD FOR PROCESSING RADIO SIGNALS USING SOFT PILOT SYMBOLS - A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16 QAM or 64 QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols. | 06-21-2012 |
| 20100290565 | CONSTELLATION RECOVERY FOR QUADRATURE AMPLITUDE MODULATION - Methods and apparatus are provided for receiving an input signal. In an embodiment of the invention a current candidate QAM constellation can be selected. A mean squared error of a signal responsive to the input signal can be computed based on the current candidate QAM constellation. The computed mean squared error can be compared to a threshold error value. The invention advantageously allows for relatively efficient and relatively reliable equalization of signals transmitted with an unknown QAM constellation, and allows for relatively efficient and reliable recovery of the unknown QAM constellation. | 11-18-2010 |
| 20120128101 | METHOD AND APPARATUS FOR ROBUST AND HIGH EFFICIENCY FEC FRAME HEADER RECOVERY - Methods and apparatus for FEC frame header detection are provided, suitable for use in a DVB-C2 receiver. A first method comprises demodulating with a quadrature phase shift keying (QPSK) demapper, followed by correlation and symmetry measures for detection of a robust FEC header. A second method comprises demodulating with a 16 quadrature amplitude modulation (QAM) demapper, followed by correlation and symmetry measures for detection of a high efficiency FEC leader. Another embodiment comprises using both the first and second methods to find the FEC header because the first symbol of the FEC frame header may be sent either in robust mode or in high efficiency mode. There is also provided a method and apparatus for generating an alternate decision statistic for determining detection of the FEC frame header. | 05-24-2012 |
| 20100208846 | RADIO RECEIVING APPARATUS AND RADIO RECEIVING METHOD - A radio receiving apparatus and a radio receiving method wherein synchronization is established at a high speed with high reliability. An IR receiver ( | 08-19-2010 |
| 20120134446 | METHOD AND APPARATUS FOR RECEIVING DATA - Modem coding and modulation techniques have greatly improved the transmission and reception of signals. A method is described including receiving a signal de-mapping the signal into a first and second substream, decoding the first and second substream using a low density parity check decoding process, and combining the first and second decoded substream into a single data stream. An apparatus is described including a symbol de-mapper that receives a signal de-maps the modulation symbols in the signal into a first and second substream, a first decoder that decodes the first substream using a low density parity check coding process at a first decoding rate, a second decoder that decodes the second substream at a second encoding rate, and a combiner that combines the first substream and the second substream into a single data stream. | 05-31-2012 |
| 20120250798 | MAXIMIZING DATA RATE BY ADJUSTING CODES AND CODE RATES - The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment. | 10-04-2012 |
| 20120170687 | Device and A Method for Obtaining a Radio Controlled Clock Signal - A device for obtaining a RCC signal and related methods are described herein improves the reliability of the RCC signal reception and demodulation. In one aspect, a device configured to obtain a RCC signal includes: a receiving circuit to receive an analog AM RCC signal and to process said analog AM RCC signal to generate a digital AM RCC signal; and a demodulation circuit in connection with said receiving circuit, to demodulate said digital AM RCC signal to generate the RCC signal. In another aspect, a method for obtaining a RCC signal includes: processing a received analog AM RCC signal to generate a digital AM RCC signal; and demodulating said digital AM RCC signal to generate said RCC signal. Since the digital processing method is more reliable than the analog processing method, the reliability of RCC signal reception and demodulation are improved. | 07-05-2012 |
| 20120076243 | METHOD FOR LIMITING INTERFERENCE RECEIVED BY A PLURALITY OF DESTINATIONS - The present invention concerns a method for limiting interference received by a plurality of destinations, the interference being generated by plural flows of complex modulation symbols transferred by a plurality of sources on same resources of a wireless telecommunication network. The method comprises the steps executed by a relay of:
| 03-29-2012 |
| 20100195769 | Method And Apparatus For Generating M-ary CPM Waveforms From A Superposition Of PAM Waveforms - To reflect advantages of a constant phase modulation waveform, the invention provides a pulse amplitude modulated PAM waveform that is a superposition of Q | 08-05-2010 |
| 20120257692 | RECEIVER SYSTEM AND METHOD OF OPERATION THEREOF - A method of operation of a communication system includes: utilizing an estimation module estimating a log-likelihood ratio for a transmission; and utilizing a slicing module, coupled to the estimation module, slicing a constellation by: reading the log-likelihood ratio from the estimation module, defining a threshold within the constellation, and adjusting the threshold based on the log-likelihood ratio for determining a symbol. | 10-11-2012 |
| 20120328053 | Orthogonal Frequency Division Multiplexed (OFDM) Demodulator Imbalance Estimation - Techniques are provided for generating an estimate of the phase and magnitude imbalance of a receiver in a communication device. For each of a plurality of symbols in a signal received by the communication device, a plurality of tones that make up the symbol are obtained. For each of the plurality of symbols, each tone is multiplied by its respective mirror tone to produce a plurality of mirror tone multiplication results, and the plurality of the mirror tone multiplication results are summed over tones to produce a sum of multiplication results for each symbol. The total power of all tones for each symbol is obtained to produce a tone power quantity for each symbol. The estimate of the phase and magnitude imbalance in the received signal is generated based on the sum of the multiplication results for each of the plurality of symbols and the tone power quantity for each of the plurality of symbols. | 12-27-2012 |
| 20120082268 | METHOD FOR DIGITAL WIRELESS COMMUNICATIONS - In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established. | 04-05-2012 |
| 20080298509 | RF Power Transmission, Modulation, and Amplification, Including Embodiments for Generating Vector Modulation Control Signals - Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion. | 12-04-2008 |
| 20080298508 | RECEIVER FOR ESTIMATING SIGNAL MAGNITUDE, NOISE POWER, AND SIGNAL-TO-NOISE RATIO OF RECEIVED SIGNALS - An improved receiver and method estimate one or more parameters, such as amplitude and signal-to-noise ratio, of a received signal, such as an M-QAM or q-ASK signal. The amplitude of an M-QAM signal is estimated based upon known or ascertainable phase information regarding a plurality of transmitted symbols. The amplitude of a q-ASK signal is estimated based upon known or ascertainable magnitude information regarding a plurality of transmitted symbols. In another embodiment, the amplitude of an M-QAM or q-ASK signal is estimated based on statistical knowledge of the amplitude of the transmitted symbols. Other embodiments estimate amplitude, noise power, and signal-to-noise ratio of a received signal utilizing second-order and fourth-order moments of received samples, a maximum likelihood searching process, or a Kurtosis estimation process. | 12-04-2008 |
| 20080298507 | Electronic Quadrature Device - An electronic quadrature device is provided comprising at least one I signal path (I) and at least one Q signal path (Q); at least one first sigma-delta modulator (DSDMI) and at least one first digital/analog converter unit (DACI) arranged in the at least one I signal path (I); and at least one second sigma-delta modulator (DSDMQ) and at least one second digital/analog converter unit (DACQ) arranged in the at least one Q signal path (Q). The at least one first sigma-delta modulator (DSDMI) is coupled to the at least one second sigma-delta modulator (DSDMQ) via at least one complex signal path (C | 12-04-2008 |
| 20100232547 | CIRCUIT AND METHOD FOR CONTROLLING A RECEIVER CIRCUIT - A method for controlling a receiver circuit and circuit with a receiver circuit and with a control circuit is provided, whereby a received signal is demodulated and filtered. An amplitude value of the demodulated and filtered signal is compared with thresholds of a window comparator. A zero crossing of the demodulated and filtered signal is compared with time thresholds of a time window by a comparison unit. A first output value of the window comparator and a second output value of the comparison unit are logically combined, and wherein, via the logical combination, the receiver circuit is turned off if, within a period of time, the amplitude value is determined to be outside a window formed by the thresholds of the window comparator, or a zero crossing is determined to be outside the time window. | 09-16-2010 |
| 20120134444 | Semiconductor Device Having First and Second Demodulation Circuits for Wireless Communication - A device receives ASK signals by using an ASK signal receiving circuit that is different from an ASK signal receiving circuit for R/W mode, when an NFC-enabled semiconductor device operates in a mode other than the R/W mode. An ASK signal receiving circuit for 100% ASK is provided on the side of a pair of transmitting terminals. This arrangement eliminates the influence of an ESD provided within an ASK signal receiving circuit for 10% ASK coupled to a pair of receiving terminals. There is no need for management of threshold values that are different according to type of ASK and it is possible to support different modulation schemes by a smaller circuit configuration. | 05-31-2012 |
| 375321000 | Single or vestigial sideband or suppressed carrier | 11 |
| 20110280343 | DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcast system and a method of processing data disclose. A receiving system of the digital broadcast system may include a baseband processor, a management processor, and a presentation processor. The baseband processor receives broadcast signals including mobile service data and main service data. The mobile service data configures a RS frame, and the RS frame includes the mobile service data and at least one type of channel setting information on the mobile service data. The management processor decodes the RS frame to acquire the mobile service data and the at least one type of channel setting information on the mobile service data, then extracts position information of an SDP message. Herein, the SDP message includes Codec information for each component in the respective virtual channel from the channel setting information, thereby accessing the SDP message from the extracted position information and gathers SDP message information. The presentation processor decodes mobile service data of a corresponding component based upon the gathered SDP message information. | 11-17-2011 |
| 20080240295 | APPARATUS FOR RECOVERING CARRIER WAVE IN DIGITAL BROADCASTING RECEIVER AND METHOD THEREFOR - An apparatus for recovering carrier wave in digital broadcasting receiver and a method therefore are disclosed which are capable of easily detecting and correcting frequency offsets of carrier wave without recourse to a pilot signal in a digital broadcasting receiver receiving a broadcasting signal of vestigial sideband (VSB) modulation system, thereby recovering the carrier wave, wherein, to this end, a complex sine wave whose central frequency is 1/n the symbol frequency is multiplied to generate a real component and imaginary Offset Quadrature Amplitude Modulation (OQAM) signals to calculate a phase error value from the real and imaginary component OQAM signals, to generate a complex sine wave compensating the calculated phase error value, to multiply the complex sine wave by the complex signal outputted from the phase splitter and to convert the complex signal to a baseband signal whose frequency offset is corrected. | 10-02-2008 |
| 20090080573 | DIGITAL BROADCASTING RECEIVER AND METHOD FOR CONTROLLING THE SAME - A reception system and a method for processing data in the reception system are disclosed. The reception system includes a baseband processor receiving a broadcasting signal including mobile service data and main service data, the mobile service data including first service data and second service data having a format different from that of the first service data, the second service data configuring a Reed Solomon (RS) frame, and the RS frame including a table which describes the second service data and signaling information of the second service data, a table handler parsing the table from the RS frame and extracting the signaling information of the second service data, and service handlers parsing the second service data from the RS frame on the basis of the extracted signaling information of the second service data. Accordingly, it is possible to transmit/receive service data having a format different from that of the existing method in a single MH system. | 03-26-2009 |
| 20080279311 | AD Converter Bandwidth Enhancement Using An IQ Demodulator And Low Frequency Cross-Over Network - A low frequency cross-over network is added to a DC coupled IQ demodulator. The low frequency data can be captured in a very accurate, low cost, low bandwidth DC coupled path with ˜40 MHz of bandwidth. The remaining bandwidth (up to 20 or more GHz) can be captured with the IQ demodulator feeding the high speed ADCs. | 11-13-2008 |
| 20080304596 | Method and System for Receiving Audio, Video and Data Services with ATSC Enabled Television Sets - Certain aspects of a method and system for receiving audio, video and data services with advanced television systems committee (ATSC) enabled television sets may be provided. Aspects of the method may include conversion of a plurality of received quadrature amplitude modulated (QAM) signals into a plurality of vestigial side band (VSB) signals within a set-top box. The set top box may tune to each of the plurality of received QAM signals and demodulate each of the plurality of received QAM signals into a plurality of bitstreams and demultiplex the plurality of bitstreams. The demultiplexed plurality of bitstreams may be modulated into a plurality of VSB signals. The plurality of VSB signals may be modulated into a plurality of RF signals. One or more of the plurality of RF signals may be communicated to at least one of a plurality of VSB enabled television sets. | 12-11-2008 |
| 20090052583 | DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN THE DIGITAL BROADCASTING SYSTEM - A digital broadcast system and data processing method therein are disclosed. A receiving system of the digital broadcast system includes a baseband processor, a table handler, a DSM-CC handler, and a display module. The baseband processor receives a broadcast signal including mobile service data and main service data. The mobile service data configures an RS frame, and the RS frame includes the mobile service data, DSM-CC (digital storage media-command and control) data and a table describing at least one channel configuration information on the mobile service data and signaling information of the DSM-CC data. The table handler extracts the at least one channel configuration information on the mobile service data and the signaling information of the DSM-CC data by parsing the table from the RS frame. The DSM-CC handler parses the DSM-CC data from the RS frame based on the extracted signaling information of the DSM-CC data. The DSM-CC handler stores the parsed DSM-CC data. The DSM-CC handler extracts a download estimated time from the DSM-CC data, and outputs the extracted download estimated time. The display module displays the download estimated time of the DSM-CC data outputted from the DSM-CC handler on a prescribed portion of a screen. | 02-26-2009 |
| 20090022247 | METHOD OF CONTROLLING AND APPARATUS OF RECEIVING MOBILE SERVICE DATA - A data transmission system for minimizing the number of errors during Tx/Rx times of mobile service data under mobile environments, and a data processing method for the same are disclosed. The system additionally codes the mobile service data, and transmits the resultant coded mobile service data. As a result, the mobile service data has a strong resistance to noise and channel variation, and can quickly cope with the rapid channel variation. | 01-22-2009 |
| 20090080572 | DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcast receiver and a control method thereof are disclosed. The control method includes receiving a broadcast signal into which mobile service data and main service data are multiplexed, extracting TPC signaling information and FIC signaling information from a data group in the received mobile service data, acquiring a program table describing virtual channel information and a service of an ensemble, using the extracted FIC signaling information, the ensemble being a virtual channel group of the received mobile service data, detecting a conditional access descriptor indicating whether the mobile service data was encrypted, using the acquired program table, and controlling such that the encrypted mobile service data is decrypted, using information of the detected conditional access descriptor. | 03-26-2009 |
| 20100054366 | DIGITAL BROADCASTING TRANSMISSION AND/OR RECEPTION SYSTEM TO IMPROVE RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a randomizer to input and randomize data streams including a plurality of segments having at least one segment having one or more null packets, a null packet exchanger to create known data having a predetermined pattern and to replace the null packets at positions of the segments having the null packets of the randomized data streams to insert the known ‘data, an encoder to encode the data streams to which the known data is inserted, and a modulation/RF unit to modulate, RF-modulate, and transmit the encoded data streams. A digital broadcasting receiver detects the known data’ from a signal received from the digital broadcasting transmitter and uses the detected known data for synchronization and equalization, so that a digital broadcasting reception performance of the digital broadcasting receiver can be improved at poor multipath channels. | 03-04-2010 |
| 20090067548 | DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA - A digital broadcast system and a data processing method are disclosed. A receiving system of the digital broadcast system includes a signal receiving unit, a demodulating unit, a program table decoder, and a controller. The signal receiving unit receives a broadcast signal in which at least one parade and main service data are multiplexed, each parade including mobile service data and data of at least one section of a program table for decoding the mobile service data. The demodulating unit demodulates data of at least one parade included in the broadcast signal. The program table decoder scans at least one demodulated parade, receives each section of the program table from the scanned parade to construct a corresponding program table, and parses the constructed program table to output program table information. The controller controls decoding of the demodulated mobile service data according to the parsed program table information. | 03-12-2009 |
| 20100008448 | TRANSMITTING/RECEIVING SYSTEM AND METHOD OF PROCESSING DATA IN THE TRANSMITTING/RECEIVING SYSTEM - A receiving system and a data processing method are disclosed. The receiving system includes a receiving unit, a demodulator, a first handler, a second handler, and a third handler. The receiving unit receives a broadcast signal comprising fast information channel (FIC) data, transmission parameter channel (TPC) data, and mobile service data packetized into an RS frame. The demodulator demodulates the broadcast signal. The first handler configures an ensemble from the RS frame, so as to acquire first signaling information including access information of the mobile service. The second handler receives second signaling information of the mobile service, so as to acquire content identification information of a second data type from the received second signaling information. And, the third handler extracts a mobile service identifier and a content identifier of a first data type from the first signaling information and constructs content identification information of a second data type. | 01-14-2010 |
