| Patent application number | Description | Published |
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| 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 |
| 20090175293 | METHOD AND SYSTEM FOR TRANSMITTING MESSAGES OVER A FORWARD LINK SIGNALING CHANNEL - A method and system for transmitting messages over an F-SCCH in wireless communication field are disclosed. The method includes the following steps: acquiring a transmission type according to a negotiation between a terminal and a network during a link initialization; configuring a bit number occupied by a message type of messages of the F-SCCH; communicating, by the network, messages with the terminal according to the configured bit number of the message type based on the determined transmission type. With the present invention, redundancy of channel configuration may be decreased, channel configuration of the conventional art is simplified, hence reducing resource occupancy and improving resource utilization of channels. | 07-09-2009 |
| 20090190645 | ADVANCED RECEIVER WITH SLIDING WINDOW BLOCK LINEAR EQUALIZER - A receiver or an integrated circuit (IC) incorporated therein includes a fast Fourier transform (FFT)-based (or hybrid FFT-based) sliding window block level equalizer (BLE) for generating equalized samples. The BLE includes a noise power estimator, first and second channel estimators, an FFT-based chip level equalizer (CLEQ) and a channel monitor unit. The noise power estimator generates a noise power estimate based on two diverse sample data streams. The channel estimators generate respective channel estimates based on the sample data streams. The channel monitor unit generates a first channel monitor signal including truncated channel estimate vectors based on the channel estimates, and a second channel monitor signal which indicates an approximate rate of change of the truncated channel estimate vectors. The FFT-based CLEQ generates the equalized samples based on the noise power estimate, one-block samples of the first and second sample data streams, the channel estimates and the monitor signals. | 07-30-2009 |
| 20090219181 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING SIGNALS - The present invention relates to the field of wireless communications and discloses wireless signal transmission and reception methods and devices, thus more information can be transmitted via a fixed resource block. In the present invention, at the transmitter side, information for transmission is divided into an n-bit part and an m-bit part, the n-bit part being taken as information borne in a physical resource and a corresponding mapping mode is selected in accordance with the m-bit part; at the receiver side, a sequence carrying a received signal is de-mapped according to all possible mapping modes of the received signal and transmitted information is derived from an optimum signal sequence resulting from de-mapping and corresponding mapping mode. | 09-03-2009 |
| 20090290630 | ADAPTIVE EQUALIZER WITH A DUAL-MODE ACTIVE TAPS MASK GENERATOR AND A PILOT REFERENCE SIGNAL AMPLITUDE CONTROL UNIT - An adaptive equalizer including an equalizer filter and a tap coefficients generator used to process a sample data stream derived from a plurality of received signals is disclosed. The tap coefficients generator includes an equalizer tap update unit, a vector norm square estimator, an active taps mask generator, a switch and a pilot amplitude reference unit used to minimize the dynamic range of the equalizer filter. A dynamic mask vector is used to mask active taps generated by the equalizer tap update unit when an unmasked signal output by the equalizer filter is selected by the switch to generate an error signal fed to the equalizer tap update unit. A fixed mask vector is used to mask active taps generated by the equalizer tap update unit when a masked signal output by the equalizer filter is used to generate the error signal. | 11-26-2009 |
| 20090290656 | MULTI-USER MIMO METHOD, APPARATUS AND COMMUNICATION SYSTEM FOR TRANSMITTING SIGNAL - A multi-user multi-input multi-output (MIMO) method for transmitting signal with a includes: performing a Tomlinson-Harashima pre-coding (THP) on raw data; decomposing a channel matrix to a product of a block triangular matrix and a unitary matrix, and generating a signal to be transmitted by performing a forward filtering on the THP coded data by using the unitary matrix. A multi-user MIMO apparatus for transmitting signal includes an interference pre-eliminating unit, a modulo unit, a forward filtering unit, and a channel matrix decomposing unit. A multi-user MIMO communication system is further provided. | 11-26-2009 |
| 20100002759 | LOW BIAS ESTIMATION OF SMALL SIGNAL-TO-NOISE RATIO - A method implemented by a user equipment includes selecting a first estimate of a signal-to-noise (SNR) ratio, calculating a first amplitude and first noise variance, calculating a second amplitude and a second noise variance, calculating a second SNR, calculating a resolution value, adjusting the first SNR, and performing estimation iterations until the resolution value is equal to a predetermined value. | 01-07-2010 |
| 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 |
| 20100067620 | REDUCED COMPLEXITY SLIDING WINDOW BASED EQUALIZER - A method and apparatus for use in data estimation in wireless communication are provided. A wireless communications signal is received and transformed to produce a received vector. The received vector is processed using a sliding window based approach that includes processing each of a plurality of windows. For each window, an approximate circulant channel response matrix is produced for use in estimating a data vector corresponding to the window. | 03-18-2010 |
| 20100091981 | Steganalysis of Suspect Media - Techniques described herein are generally related to steganalysis of suspect media. Steganalysis techniques may include receiving instances of suspect media as input for steganalytic processing. A first set of quantized blocks of data elements may be identified within the media, with this first set of blocks being eligible to be embedded with steganographic data. A second set of quantized blocks of data elements may be identified within the media, with this second set of blocks being ineligible to be embedded with steganographic data. The steganalysis techniques may requantize the first and second blocks. In turn, these techniques may compare statistics resulting from requantizing the first block with statistics resulting from requantizing the second block. The steganalysis techniques may then assess whether the first block of data elements is embedded with steganographic features based on how the statistics of the second blocks compare with the statistics of the first blocks. | 04-15-2010 |
| 20100215084 | SIMPLE AND ROBUST DIGITAL CODE TRACKING LOOP FOR WIRELESS COMMUNICATION SYSTEMS - A simple and robust CTL is used for time tracking of multipath components of a spread spectrum signal transmitted over a wireless multipath fading channel. A digital code-tracking loop includes the implementations of despreading early and late data samples by use of a pseudonoise sequence, an error signal output generated by the despreading, and adjustment for a plurality of on-time, early and late samples, a data rate of a control signal provided as a fractional proportion of a data rate of error signals. | 08-26-2010 |
| 20100232528 | METHOD AND SYSTEM FOR DATA TRANSMISSION - A data transmission method, a communications system and related apparatuses are disclosed. The data transmission method includes the following steps: a transmitter obtains channel information corresponding to channels between the transmitter and several receivers; the transmitter obtains a control vector corresponding to a receiver according to the channel information; the transmitter modulates data to be transmitted by means of one-dimensional modulation to obtain modulated symbols; the transmitter processes the modulated symbols and the control vector to obtain transmitted data of each antenna; the transmitter transmits the transmitted data to the receiver; the receiver receives the transmitted data in a predetermined spatial direction of received symbol. The present invention also discloses a communications system and related apparatuses. | 09-16-2010 |
| 20100235440 | MESSAGE PROCESSING METHOD, SYSTEM AND CLIENT - The embodiments of the present invention disclose a message processing method including: when a backup message user selects a backup message option, obtaining a backup message and information corresponding to the backup message input by the backup message user; and sending the backup message to the target user according to the information corresponding to the backup message. The present invention also discloses a message processing system and an IM client. By using the embodiments of the present invention, a backup message function and a roaming function of the backup message can be implemented, thereby improving the availability, flexibility and convenience performance of IM software. | 09-16-2010 |
| 20100239043 | METHOD AND APPARATUS FOR DETECTING SIGNALS OF MULTI-INPUT MULTI-OUTPUT SYSTEM - The embodiments of the present invention disclose a method and an apparatus for detecting signals of a MIMO system, and relate to a MIMO technology. The method includes: performing triangular decomposition on a channel matrix of the MIMO system, and decomposing the MIMO system into multiple MIMO subsystems; detecting the receiving signal vector of the first MIMO subsystem, and obtaining the candidate detection vector list of the first MIMO subsystem; detecting remaining MIMO subsystems consecutively in a SIC mode, and generating candidate detection vector lists of the remaining MIMO subsystems; and combining all the lists, and marking decision or performing calculation to obtain the transmitting signal vector of the MIMO system. | 09-23-2010 |
| 20100269114 | INSTANT MESSENGER AND METHOD FOR DISPATCHING TASK WITH INSTANT MESSENGER - Embodiments of the present invention provide an Instant Messenger (IM) and a method for dispatching tasks by the IM. The method includes: presetting task information in a start-up program configuration table, and dispatching, by the IM, tasks in batches according to the task information in the start-up program configuration table. Preferably, the task information includes the execution delay information and priority information of the tasks. The IM includes a logging-on flow management module and a task dispatching management module. The logging-on flow management module is adapted to store the start-up program configuration table, which is configured with the task information. The task dispatching management module is adapted to dispatch the tasks in batches according to the task information in the start-up program configuration table. With embodiments of the invention, the start-up delay of the IM may be reduced. | 10-21-2010 |
| 20100330922 | USER SELECTION METHOD AND APPARATUS FOR MULTIUSER MULTIPLE-INPUT MULTIPLE-OUTPUT - A user selection method and apparatus for multiuser multiple-input multiple-output (MIMO) are disclosed. The method includes: selecting two user-beam pairing modes, and obtaining target functions corresponding to the two user-beam pairing modes; comparing the target functions corresponding to the two user-beam pairing modes; and selecting a user-beam pairing mode with a larger target function. With the present invention, the optimal user-beam pairing mode can be quickly obtained when the channel information is inaccurate; and the calculation is simplified. | 12-30-2010 |
