Patent application number | Description | Published |
20090129284 | APPARATUS AND METHOD FOR REPORTING CHANNEL QUALITY INDICATOR IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for reporting a Channel Quality Indicator (CQI) in a wireless communication system are provided. The method includes estimating a per-subband CQI with respect to each transport layer and generating a broadband CQI with respect to each transport layer according to the per-subband CQI, comparing the broadband CQI and the per-subband CQI with respect to each transport layer to determine a difference value thereof, determining an offset value to be used in a differential CQI, determining the differential CQI by subtracting the offset value from the determined difference value, and transmitting a transmission symbol by converting the determined differential CQI into the transmission symbol. | 05-21-2009 |
20090316821 | APPARATUS AND METHOD FOR POWER CONTROL IN MOBILE COMMUNICATION SYSTEM - An apparatus and method for power control are provided. In a receiver in a mobile communication system, a Receive (Rx) signal received through a plurality of antennas is estimated. A power ratio between a traffic channel of the Rx signal and a pilot channel of the Rx signal is determined. A Log Likelihood Ratio (LLR) value is determined using the power ratio between the traffic channel and the pilot channel, a symbol of the traffic channel, and an Rx signal estimation value to which precoding is applied. | 12-24-2009 |
20100061306 | CELL SEARCH METHOD AND APPARATUS FOR ASYNCHRONOUS MOBILE COMMUNICATION SYSTEM - A cell search method and apparatus for an asynchronous mobile communication system are provided. A Secondary Synchronization Code (SSC) correlator despreads a signal at every slot boundary in accordance with a z-sequence to output a SSC correlation value. The signal is received over a first symbol duration. A Primary Synchronization Code (PSC) correlator despreads the received signal in accordance with a PSC to output a PSC correlation value. A dot product calculator performs dot product calculation between the SSC correlation value and the PSC correlation value to output a correlation result of the SSC. A frame synchronization detector extracts frame synchronization information from the correlation result. | 03-11-2010 |
20100118707 | DEVICE AND METHOD FOR DETERMINING HIGH SPEED SHARED CONTROL CHANNEL IN A COMMUNICATION TERMINAL - An apparatus and method for detecting high speed shared control channel of a communication terminal is provided, which recognizes decoding reliability for each of high-speed shared control channel by decoding each of a plurality of high-speed shared control channels; decides a maximum and a minimum in the decoding reliability, calculates a difference between the maximum and the minimum to compare the calculated difference with a preset critical value; and detects and processes a high-speed shared control channel corresponding to the maximum, when the difference exceeds the critical value. Accordingly, even though the wireless environment is inferior, the decoding reliability of an HS-SCCH can be more accurately decided in an HS-SCCH detection apparatus of the communications terminal and the detection performance of the HS-SCCH can be improved in a communication terminal. | 05-13-2010 |
20100303141 | APPARATUS AND METHOD FOR RECEIVING SIGNAL USING RAKE RECEIVER AND EQUALIZER IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for selecting a receiver for demodulating a reception signal at a reception end having a plurality of receivers are provided. The method includes determining, a mean and a standard deviation of Signal-to-Noise Ratios (SNRs) of the receivers are determined, estimating a Doppler frequency, determining a statistical value of a modulation order of subframes received in advance, determining SNR estimation values of the receivers based on the determined mean and standard deviation of the receivers, the estimated Doppler frequency, and the determined statistical value of the modulation order of the received subframes, selecting one receiver having a largest SNR estimation value among the determined SNRs of the receivers, and demodulating a reception signal using the selected receiver. | 12-02-2010 |
20110038407 | Equalizer receiver in a mobile communication system and method therefor - A method for receiving a signal using an equalizer receiver in a mobile communication system includes matched-filtering a signal received via an antenna. The method also includes generating different phase information for a serving cell and one or more other cells. The method further includes generating Pseudo-random Noise (PN) codes for the cells based on the phase information; estimating channel estimation values for the cells using the PN codes and the filtered signal; modeling random sequences similar in statistical property to signals transmitted from the cells using the channel estimation values, and generating a filter coefficient using the modeled random sequences; and equalizing the filtered signal using the filter coefficient. By doing so, the receiver's channel estimation performance and equalizer adaptation performance may be maximized. | 02-17-2011 |