INNOWIRELESS CO., LTD. Patent applications |
Patent application number | Title | Published |
20150333818 | ADAPTIVE INTERFERENCE CANCELLATION APPARATUS FOR CANCELLING SIDE LOBE BETWEEN NEIGHBORING CELLS - An adaptive interference cancellation apparatus for cancelling a side lobe between neighboring cells installed in a repeater and capable of improving quality of a communication signal and preventing frequent handover by maintaining a serving base station signal among repeater signals and cancelling an interference signal from a neighboring cell is provided. The adaptive interference cancellation apparatus for a side lobe between neighboring cells, which is installed in a mobile communication repeater system comprising an omni-directional antenna, includes: three directional antennas installed around the omni-directional antenna; an output signal selector configured to select and output two of three directional antenna incident signals; and an adaptive noise canceller configured to adaptively filter the two directional antenna incident signals output from the output signal selector, estimate a noise reference signal, and extract a serving base station signal by subtracting the estimated noise reference signal from an omni-directional antenna incident signal. | 11-19-2015 |
20150295699 | METHOD OF CONTROLLING TDD TX/RX SWITCHING TIMING IN CLOUD RADIO ACCESS NETWORK - Provided is a method for controlling a time division duplexing (TDD) Tx/Rx switching timing in a cloud radio access network (CRAN) that can finely control a switching timing between transmission and reception of TDD signals with an additional component added to a digital unit (DU) and a radio unit (RU) in the CRAN. | 10-15-2015 |
20150208323 | FLEXIBLE CONNECTION CONTROL FEMTOCELL ACCESS POINT (FAP) DEVICE OF SMALL CELL AND METHOD OF DRIVING THE SAME - A flexible connection control femtocell access point device of a small cell and a method of driving the same are provided. A maximum system load is used and network efficiency is maximized by calculating a system load occurring when a mobile station is newly connected according to the type of services that user equipments, that is, mobile stations, in a small cell, such as a femtocell, desire to use, comparing the calculated system load and the maximum system load, and determining whether to limit connection of the mobile station. | 07-23-2015 |
20150026535 | APPARATUS AND METHOD FOR GENERATING INTERLEAVER INDEX - Disclosed is an apparatus and a method for generating an internal interleaver index of a turbo encoder in parallel. There are effects of reducing the time spent for generating total indexes by generating indexes for a plurality of bits in parallel and improving the resource efficiency and the performance in the hardware implementation by calculating indexes for following bits through the use of an index calculated for a predetermined bit without the use of a multiplier and a divider. | 01-22-2015 |
20140375485 | TURBO ENCODER APPARATUS - Disclosed is a turbo encoder apparatus using an improved signal processing method in order to enhance a speed of a turbo encoder used in a channel coding technology. There are effects of reducing a time spent for performing an encoding by performing the encoding in the unit of plural bits every clock cycle and performing a turbo encoding with a structure optimized for a total signal processing processor through the assembly of input forms of encoding output bitstreams in a subsequent signal processing step for encoding through the bitstream assembling apparatus. | 12-25-2014 |
20140334285 | BASE STATION APPARATUS FOR DECREASING AMOUNT OF TRANSMISSION DATA WITH CLOUD RADIO ACCESS NETWORK - There is disclosed a base station apparatus having a cloud radio access network (CRAN) structure. The base station apparatus includes a digital unit (DU) that includes a baseband processing unit for processing signals of a baseband, a Fast Fourier Transform (FFT) operation unit that converts baseband signals of a time domain into signals of a frequency domain, an Inverse FFT (IFFT) operation unit that converts signals of a frequency domain into signals of a time domain, and a radio unit (RU) that processes radio signals with respect to a terminal, and transmits and receives the processed signals, wherein the FFT operation unit and the IFFT operation unit are provided in the RU to reduce an amount of transmission and reception data between the DU and the RU. | 11-13-2014 |
20140301385 | LTE CELL DETECTING APPARATUS IN MULTI-CELL ENVIRONMENT - There is disclosed a Long Term Evolution (LTE) cell detecting apparatus in a multi-cell environment that may efficiently detect an LTE cell even in a multi-cell environment where interference occurs between adjacent cells. | 10-09-2014 |
20140294057 | APPARATUS AND METHOD OF COMPENSATING FOR I/Q IMBALANCE IN DIRECT UP-CONVERSION SYSTEM - An apparatus and a method of compensating for an I/Q imbalance in a direct up-conversion system prevents the performance of the system from being deteriorated by efficiently compensating for an I/Q timing skew, an I/Q phase imbalance, and an I/Q gain imbalance by using a characteristic of an OFDM scheme in an Orthogonal Frequency Domain Multiple (Access) (OFDM(A)) system using a direct up-conversion scheme. According to the apparatus and the method of compensating for an I/Q imbalance in the direct up-conversion system of the present invention, an OFDM(A) system using a direct up-conversion scheme may efficiently compensate for I/Q timing skew, I/Q phase imbalance, and I/Q gain imbalance by using a characteristic of an OFDMA scheme, so that a performance of the system is prevented from being deteriorated. | 10-02-2014 |
20140269458 | DEVICE AND METHOD FOR TRANSMITTING TDD DOWNLINK DATA IN AN LTE SYSTEM - A device for transmitting TDD downlink data in an LTE system includes: a data buffer sequentially loading IP data irregularly delivered from a layer 3 processing unit; a transmission control unit providing instructions for the creation of an ordinary downlink sub-frame PDU queue and a special sub-frame PDU queue at a ratio appropriate to UL/DL configuration information and sequentially delivering the data loaded in the ordinary downlink sub-frame PDU queue and the special sub-frame PDU queue to a layer 1 processing unit in the order prescribed in UL/DL configuration and in the loaded order; and an ordinary downlink sub-frame PDU queue creating unit and a special sub-frame PDU queue creating unit which create the ordinary downlink sub-frame PDU queue and the special sub-frame PDU queue according to the instructions of the transmission control unit and load the data loaded in the data buffer. | 09-18-2014 |
20140269398 | METHOD FOR TRANSMITTING A CQI INDEX FROM A USER TERMINAL - A user terminal and a method for transmitting a CQI index from the user terminal to a base station. A method for performing a CQI index conversion so as to have a constant number of bits regardless of the number of bits of a calculated CQI index includes the steps of: calculating the CQI index for a signal received from the base station; converting the calculated CQI index to an one-bit CQI index through delta-sigma modulation; and transmitting the converted one-bit CQI index to the base station. | 09-18-2014 |
20140023000 | METHOD OF DETECTING PHYSICAL DOWNLINK CONTROL CHANNEL IN LONG-TERM EVOLUTION SYSTEM - Disclosed herein is a method of detecting a physical downlink control channel (PDCCH) in a long-term evolution (LTE) system. In this method, one is selected from among possible PDCCH formats for received base station signals, and a signal corresponding to the length of the selected PDCCH format is retrieved. Thereafter, one is selected from among one or more of possible DCI formats that have not been selected yet. Thereafter, decoding is performed using the retrieved signal and the selected DCI format. Finally, a remainder is obtained by dividing the decoded signal by a cyclic redundancy check (CRC) pattern, and the remainder is stored as RNTI information, along with the selected DCI and the DCI format. | 01-23-2014 |
20130265927 | METHOD OF DECODING PHYSICAL BROADCAST CHANNEL IN LONG TERM EVOLUTION SYSTEM - The present invention relates, in general, to a method of decoding a Physical Broadcast Channel (PBCH) in a Long Term Evolution (LTE) system and, more particularly, to a method of detecting a Master Information Block (MIB) contained in a PBCH. | 10-10-2013 |
20130215856 | PREAMBLE SEQUENCE DETECTION APPARATUS - The present invention relates to a method for shortening the time taken for physical random access channel (PRACH) signal synchronization and preamble sequence detection in an LTE uplink system, and more particularly, to a method for shortening the time taken for preamble sequence detection using an inverse discrete Fourier transform. To this end, a preamble sequence detection apparatus according to the present invention comprises: a reference signal generation unit, which receives a first signal having a predetermined value, generates a preamble sequence, performs a discrete Fourier transform, a subcarrier mapping, and an inverse discrete Fourier transform on the generated preamble sequence, and then expands the resultant signal at a set rate to quantize the resultant signal; a PRACH reception unit which receives a PRACH signal transmitted from a terminal; and a correlation unit which detects a correlation between the reference signal received from the reference signal generation unit and a signal received from the PRACH reception unit. | 08-22-2013 |
20130208679 | REFERENCE SIGNAL CREATION APPARATUS AND PREAMBLE SEQUENCE DETECTION APPARATUS USING THE SAME - The present invention relates to a method for shortening the time taken for physical random access channel (PRACH) signal synchronization and preamble sequence detection in an LTE uplink system, and more particularly, to a method for shortening the time taken for preamble sequence detection using an inverse discrete Fourier transform. To this end, a preamble sequence detection apparatus according to the present invention comprises: a reference signal generation unit, which includes a preamble sequence generation unit for receiving a first signal having a predetermined length and outputting a plurality of second signals having the length of 839, a discrete Fourier transform unit for performing a discrete Fourier transform on the second signals received from the preamble sequence generation unit to transform the second signals into a frequency domain signal, a subcarrier mapping unit for mapping the frequency domain signal outputted from the discrete Fourier transform unit to a subcarrier, and an inverse discrete Fourier transform unit for receiving a signal having the length of 2 | 08-15-2013 |
20130187694 | DIGITAL RE-SAMPLING APPARATUS USING FRACTIONAL DELAY GENERATOR - Disclosed herein is a digital re-sampling apparatus. The digital re-sampling apparatus includes a sample buffer, a sample buffer control unit, a filter bank, a first delay bank, a fractional delay constant table, a combiner bank, and a second delay bank. The sample buffer temporarily stores an input sample in synchronization with an input sampling frequency. The sample buffer control unit controls writing and reading operations. The filter bank includes a number of digital filters equal to the number of stages, and filters the input sample. The first delay bank differentially delays a filter output value. The fractional delay constant table stores information about re-sampling time. The combiner bank includes a number of adders and multipliers, performs an operation, and outputs a re-sampled value. The second delay bank causes a delay so that output of each combiner can be synchronized with each output of the fractional delay constant table. | 07-25-2013 |
20130176886 | AUTOMATIC DETECTION APPARATUS FOR UL/DL CONFIGURATION IN LTE-TDD SIGNAL AND THE METHOD THEREBY - This invention relates to an automatic detection apparatus for UL/DL configuration in LTE-TDD signal and the method thereby for automatically detecting the UL/DL configuration number of an LTE-TDD signal without a decoder by using a simple structure. An automatic detection apparatus for UL/DL configuration in LTE-TDD signal comprises: a signal receiving unit for receiving an LTE-TDD RF signal and converting the LTE-TDD RF signal into a LTE-TDD baseband signal; a signal extracting unit for extracting a cell-specific reference signal for each subframe length in one frame length of the LTE-TDD baseband signal received from the signal receiving unit; a signal power measurement unit for measuring the power of the corresponding subframe reference signal according to the cell-specific reference signal received from the signal extracting unit; and an UL/DL configuration determination unit for determining whether the corresponding subframe is a DL subframe or an UL subframe according to the comparison result of the power of the corresponding subframe reference signal measured in the signal power measurement unit with a predetermined reference value, and determining the UL/DL configuration number for the corresponding frame based on the subframe number determined as described above. In the above configuration, it is characterized in that the predetermined reference value is the noise power without any LTE-TDD signal. | 07-11-2013 |
20130173195 | CALIBRATION METHOD OF MODULATION POWER FOR DVB-H TEST APPARATUS - This invention relates to a calibration method of modulation power for DVB-H test apparatus for reducing the calibration time for the power loss in the RF cable to half through calibration using the expected power loss of the modulated wave at an arbitrary frequency based on the measured power losses of the continuous wave over frequencies in the RF cable. The calibration method of modulation power for DVB-H test apparatus that is performed by the computer with installed calibration program therein and connected to the power meter of the DVB-H test apparatus, comprises and includes the steps of: commanding DVB-H test apparatus to output continuous waves having frequencies from the start frequency to the stop frequency with increment of frequency step in accordance with the preset power level; storing CW power offset, that is the difference between the actual power level and the preset power level, to the table after receiving actual power level of continuous waves having frequencies from the start frequency to the stop frequency with increment of frequency step from the power meter; commanding DVB-H test apparatus to output a modulated wave that carries data on a continuous wave having an arbitrary frequency between the start frequency and the stop frequency, thereafter receiving actual output power level from the power meter, and calculating the modulation power offset between the continuous wave and the modulated wave at the corresponding arbitrary frequency, thereafter commanding DVB-H test apparatus to output the preset power level added with the power offset of the continuous wave and the power offset of the modulated wave when transmitting the modulated wave. | 07-04-2013 |
20130155833 | APPARATUS AND METHOD FOR I/Q OFFSET CANCELLATION IN SC-FDMA SYSTEM - The present invention relates to an apparatus and a method for eliminating I/Q offset in a receiver of a SC-FDMA system which improves performance of the system by accurate measurement and cancellation of I/Q offset in a receiver of a SC-FDMA system operating in a | 06-20-2013 |
20120259571 | IQ CALIBRATION METHOD OF TEST DEVICE FOR WIRELESS COMMUNICATION SYSTEM SUCH AS DVB-H SYSTEM OR LIKE, DEVICE, AND TEST DEVICE MANUFACTURING METHOD - The present invention relates to an automatic calibration method of a test device for testing a wireless communication system such as a DVB-H or the like, a device, and a manufacturing method thereof, and more specifically, to a calibration method and device for providing an automatic calibration data generation function, in which the same frequency characteristic of the test device is maintained in various frequency bands and the test device is capable of generating an exact and reliable test signal. The calibration method of the present invention comprises the steps of: (a) extracting the size of a removal target signal component on the basis of a calibration signal generated from the test device; (b) extracting a change value of the size of the removal target signal component; (c) adjusting at least one calibration parameter on the basis of the change value, and transmitting an adjusted calibration parameter value to the test device, and calculating a calibration parameter value which minimizes the size of the removal target signal component, and generating the calculated value as calibration data, by repeatedly performing the steps (a) to (c). | 10-11-2012 |
20110054826 | APPARATUS AND METHOD FOR SIMULTANEOUSLY TESTING WIRELESS COMMUNICATION TERMINALS - Disclosed herein is an apparatus and apparatus for simultaneously testing a plurality of wireless communication terminals. The apparatus for simultaneously testing a plurality of wireless communication terminals includes one or more virtual Operating Systems (OSs) each configured to be run under an actual Operating System (OS) and to connect a wireless communication terminal with a test module independently of the actual OS, a plurality of test modules each configured to test a wireless communication terminal under the actual OS or one of the virtual OSs, and a control module configured to assign a plurality of wireless communication terminals recognized by the actual OS to the actual OS and the virtual OSs in a one-to-one correspondence and to assign the plurality of test modules to the actual OS and the virtual OSs in a one-to-one correspondence so that the test modules can be run simultaneously. | 03-03-2011 |
20110051792 | SIGNAL ANALYZING APPARATUS FOR LTE SYSTEM - A signal analysis apparatus of an LTE system includes a radio frequency reception unit for receiving a radio frequency signal of the LTE system and converting it into a signal of an intermediate frequency, a digital signal conversion unit for converting an analog signal, processed by the radio frequency reception unit, into a digital signal, a baseband conversion unit for converting the signal of the intermediate frequency into a baseband signal, a baseband signal simple analysis unit for decoding the baseband signal in real time in accordance with an LTE standard, a signal depository for storing the baseband signal, a baseband signal precision analysis unit for decoding and analyzing the baseband signal in accordance with the LTE standard and analyzing various items derived in the decoding process, two switching units for alternatively connecting the baseband conversion unit or the signal depository to the baseband signal simple analysis unit or the baseband signal precision analysis unit, and a control unit for controlling the switching units. | 03-03-2011 |
20090069006 | METHOD FOR REMOTELY LOGGING DIAGNOSTIC MONITORING DATA FOR MOBILE TELECOMMUNICATION NETWORK - The present invention relates, in general, to a method for remotely logging diagnostic monitoring message data on a mobile telecommunication network and, more particularly, to a method for remotely logging diagnostic monitoring message data on a mobile telecommunication network, which, in measuring equipment for diagnosing abnormal service in the mobile telecommunication network, is capable of securely logging the diagnostic monitoring message data of a mobile telecommunication terminal to a remote server while minimizing the load on the mobile telecommunication network. | 03-12-2009 |
20090027481 | METHOD OF MONITORING 3G VIDEO TELEPHONY THROUGH DM PORT - Disclosed herein is a method of monitoring 3G video telephony through a DM port. The method is performed using monitoring equipment in a state in which the monitoring equipment, provided with a driver module capable of opening the DM port of a mobile communication terminal for measurement, is connected to the mobile communication terminal. The method includes the steps of (a) opening the DM port of the mobile communication terminal, (b) setting up connection between the mobile communication terminal and a counterpart terminal by sending a key press command through the DM port, (c) sending H.324M protocol-based log commands through the DM port in order to receive voice or video data from the counterpart terminal, and receiving the voice or video data from the mobile communication terminal, (d) decoding and decompressing payload data of the received voice or video data, and (e) analyzing the decompressed voice or video data. | 01-29-2009 |
20080313344 | DUAL PROCESSING SYSTEM CAPABLE OF ENSURING REAL-TIME PROCESSING IN PROTOCOL CONFORMANCE TEST - Disclosed herein is a dual processing system capable of ensuring real-time processing in a protocol conformance test. A protocol testing device performs a test on a layer under protocol test provided in a device under test. A communication device processes the protocol of a layer below the layer under protocol test between the device under test and the protocol testing device. The communication device processes a protocol test message, requiring real-time processing, instead of the protocol testing device, and transmits processing results for the protocol test message to the protocol testing device. The protocol testing device processes a protocol test message, not requiring real-time processing, and determines the conformance of the layer under protocol test provided in the device under test based on the processing results for the protocol test message. | 12-18-2008 |
20080299964 | TRANSMISSION/RECEPTION CHANNEL MATCHING APPARATUS FOR MOBILE COMMUNICATION TERMINAL AND MOBILE PHONE TEST EQUIPMENT - Disclosed herein is a transmission/reception channel matching apparatus for a mobile communication terminal and a mobile phone test equipment. The transmission/reception channel matching apparatus includes a Printed Circuit Board (PCB), a Dual In-line Package (DIP) switch, and a fastening casing. The PCB includes mobile communication terminal-side terminals to be electrically connected to option pins provided in the serial communication connector of the mobile communication terminal, and transmission and reception terminals corresponding to the transmission and reception channels of the mobile phone test equipment for transmitting a transmission signal to the mobile communication terminal and receiving a reception signal from the mobile communication terminal. The DIP switch is provided with a plurality of switches, is combined with the PCB, and selectively connects the mobile communication terminal-side terminals to the transmission and reception terminals depending on ON/OFF information. The fastening casing accommodates the PCB so that part of the DIP switch is exposed to the outside. | 12-04-2008 |
20080293401 | TRANSMISSION/RECEPTION CHANNEL MATCHING APPARATUS AND METHOD FOR MOBILE COMMUNICATION TERMINAL AND MOBILE PHONE TEST EQUIPMENT - Disclosed herein is a transmission/reception channel matching apparatus and method for a mobile communication terminal and a mobile phone test equipment. The apparatus includes mobile communication terminal-side terminals, transmission and reception terminals, a connection detection unit, a switching unit, and a control unit. The mobile communication terminal-side terminals are connected to the option pins of a serial communication port in a one-to-one correspondence. The transmission and reception terminals correspond to the transmission and reception channels of the mobile phone test equipment. The connection detection unit detects the state of connection between the mobile communication terminal-side terminals and the option pins. The switching unit connects the mobile communication terminal-side terminals to the transmission and reception terminals. The control unit automatically sets the transmission and reception channels of the mobile communication terminal and the transmission and reception channels of the mobile phone test equipment with reference to the state of the connection, and outputs the channel matching command. | 11-27-2008 |
20080291841 | Mobile Wimax Signal Analyzing Method - Disclosed herein is a method of analyzing portable Internet signals in a measuring instrument. The method includes the steps of (a) acquiring synchronization using a preamble included in a currently received frame, (b) acquiring the access parameters of a DL_MAP included in the frame, and checking the validity of the DL_MAP, (c) if, as a result of the check at step (b), the DL_MAP is determined to be valid, acquiring downlink parameters and burst configuration information by interpreting the DL_MAP, and (e) performing a variety of diagnoses, including evaluation of signal quality for each burst, using the parameters and the burst configuration information. | 11-27-2008 |
20080285764 | Method for Automatically Controling Volume Level for Calculating Mos - The present invention relates to a method of automatically controlling the volume level of communication speech for Mean Opinion Score (MOS) measurement, which, before evaluating the quality of communication speech using a MOS measurement method, automatically controls the volume level of actual communication speech to a predetermined optimal level, thus improving the reliability of MOS values. | 11-20-2008 |