Samsung Electronics Co., Ltd.

Bong-Gee Song

Yun-Sang Park

Jae-Hwan Chang

Seung-Eun Hong

Kwang-Seop Eom

Jong-han Lim

Tae-Gon Kim

Jin-Woo Roh

Min-Cheol Park

Hae-Dong Yeon

Jae-Yong Lee

Hong-Sung Chang

In-hyoung Kim

In-Hyoung Kim

Yeong-Moon Son

Jung-Shin Park

Ji-Yun Seol

Yong Chang

Jae-Jeong Shim

So-Hyun Kim

Tae-Won Kim

Hyon-Goo Kang

Min-Hee Cho

Byung-Tae Kang

Seung-Il Yoon

Hyeong-Jong Ju

In-Chun Lim

Soon-Young Yoon

Jae-Hee Cho

Sung-soo Kim

Jung-Ho Lee

In-Seok Hwang

Geun-Hwi Lim

Hoon Huh

Sung-Joon Park

Hyun-Sang Cho

Soo-bok Yeo

Young-Hak Kim

Yong-Sun Hwang

Yun-Ho Jung

Kil-Ho Shin

Seo-Goo Lee

Hyung-Sang Cho

Min-Goo Kim

Dong-Min Kim

Chae-Man Lim

Sang-Hyo Kim

Dong-Kyu Kim

Sang-Hyuck Ha

Joong-Ho Jeong

Young-Mo Gu

Jong-Han Lim

Dong-Joon Shin

Jun-Kyu Kang

Kwang-Man Ok

Yong-Won Shin

Tae-Ik Song

Eun-Sun Choi

Tae-hee Han

Kyung-Chul Yoo

Young-Seok Jung

Gaun-Hwi Lim

Ki-Joon Hong

Eun-Sun Cho

Hye-Jin Yeou

Geun-Kwi Lim

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.

Apparatus and method for power control in mobile communication system

A decoding apparatus and method of a terminal in a wireless communication system are provided. A carrier to interference and noise ratio (CINR) estimator estimates a CINR value of a received signal, and a controller generates a modulation and coding scheme (MCS) level candidate set satisfying the estimated CINR value and a target packet error rate (PER) based on a look-up table. A decoder switch determines if an MCS level of a burst is included in the MCS level candidate set when the burst having no connection identifier (CID) information exists in a corresponding frame, and determines to decode the corresponding burst if the MCS level of the burst is included in the MCS level candidate set and to discard the burst otherwise.

Decoding apparatus and method of terminal in wireless communication system

An apparatus and method for reducing a Peak-to-Average Power Ratio (PAPR) are provided. The apparatus includes a gain processor for multiplying time signals in paths by gains set for respective paths, a delay processor for delaying gain-multiplied signals in second to last paths except for a first path by time delays set for respective second to last paths, a summer for summing the gain-multiplied signal for the first path received from the gain processor and the delayed signals received from the delay processor, a PAPR processor for measuring a PAPR of the summed signal received from the summer, for comparing the measured PAPR with a target PAPR, and for requesting one or more changes of at least one of the gain and time delay of each path, and a gain delay controller for changing the at least one of the gain and the time delay of each path according to the request received from the PAPR processor and for controlling the gain processor and the delay processor according to the change.

Apparatus and method for reducing PAPR in an OFDM system

An apparatus and a method for Hybrid Automatic Repeat reQuest (HARQ) in a wireless communication system are provided. A receiver includes a Media Access Control (MAC) layer part for error-checking each MAC Packet Data Units (PDUs) extracted from a physical layer burst, and generating HARQ combination control information according to a result of the error check; a receiving part for receiving a retransmit burst; and a combiner for selecting one or more Forward Error Correction (FEC) blocks from the retransmit burst according to the HARQ combination control information, and HARQ-combining the selected one or more FEC blocks.

Apparatus and method for hybrid automatic repeat request (HARQ) in wireless communication system

A method for processing data of a received frame in a receiver of a broadband wireless communication system. The received data processing method includes extracting, from control information for data of one frame having multiple bursts, burst sizes of bursts constituting the frame and modulation scheme information applied to the frame; assigning burst identifiers (IDs) used for identifying the bursts, and assigning burst partial IDs to data concatenations having concatenation sizes based on the burst sizes and the modulation scheme information; forming, in a memory, burst regions for storing the data concatenations according to the burst IDs; dividing received data of one slot included in the frame into data concatenations based on the concatenation sizes, and decoding the data concatenations; and sequentially storing the decoded data concatenations in the memory according to a burst ID and a burst partial ID corresponding to each of the decoded data concatenations.

Apparatus and method for processing received data in a broadband wireless communication system

An apparatus and a method for acquiring synchronization to support multi-frequency in a mobile communication terminal are provided. The apparatus includes a frequency generator, a control signal generator and at least two modems for operating respective Frequency Allocations (FAs) by sharing the frequency generator and the control signal generator. In an embodiment, the frequency generator respectively receives first reference frequency clock signals from an oscillator of each of the at least two modems and generates a second reference frequency clock signal and the control signal generator outputs a signal for controlling the oscillator of each of the at least two modems according to a frequency offset value estimated in each of the at least two modems.

Apparatus and method for acquiring synchronization to support multi-frequency in mobile communication terminal

An apparatus and a method for selecting an operation mode to improve a throughput in a mobile communication system are provided. The apparatus includes a Carrier to Interference and Noise Ratio (CINR) predictor for predicting a probable average and dispersion for a CINR measured using a preamble of a received pilot signal or radio signal, a metric calculator for calculating a throughput for each Modulation and Coding Scheme Level (MCS_Level) by using the probable average and dispersion for the predicted CINR and for selecting an MCS_Level having a maximum throughput, and an operation mode selector for selecting an operation mode of the selected MCS_Level having the maximum throughput.

Apparatus and method for selecting operation mode in MIMO communication system

Method and apparatus for performing communication between a Base Station (BS) and a Mobile Station (MS) in a Broadband Wireless Access (BWA) communication system. A method includes determining, by the BS, a Pseudo Random Bit Sequence Identifier (PRBS_ID) for renumbering subchannels in a predetermined Partial Usage of SubChannels (PUSC) zone among a plurality of PUSC zones in a downlink (DL) frame, and transmitting, by the BS, the PRBS_ID to the MS within a Space Time Coding Zone Information Element (STC_ZONE_IE) of a DL MAP message included in the DL frame.

System and method for providing services using the same frequency in a wireless communication system

An apparatus and method for estimating a cell load in a wireless communication system are provided. The apparatus includes a ranging response counter, a load estimator, an FA handover determiner, a data rate determiner, and a handover determiner. The ranging response counter counts the number of ranging response messages that are received during one period of periodic ranging. The load estimator estimates a cell load on the basis of the number of the ranging response messages. The FA handover determiner determines an FA handover on the basis of the cell load from the load estimator. The data rate determiner controls a data rate of a service on the basis of the cell load from the load estimator and requests the controlled data rate to the system. The handover determiner controls handover parameters on the basis of the cell load from the load estimator.

Apparatus and method for estimating cell load in wireless communication system

Disclosed is a method and apparatus for efficiently controlling buffers which support a Hybrid Automatic Repeat Request (HARQ) in a wireless communication system. Buffer regions for the HARQ scheme are not fixedly allocated according to channel identification information, but are allocated from the viewpoint of one overall memory through aggregation support. That is, an HARQ buffer is dynamically controlled. Therefore, there are the effects reducing the size of the entire chip, as well as reducing power consumption of the entire system according to the reduction of the chip size.

Method and apparatus for dynamically allocating HARQ buffer in wireless communication system

Disclosed is an apparatus and a method for effectively allocating frequency resources in a mobile communication system. The method includes: determining a first offset of a preset frequency band from among all frequency bands, determining a second offset corresponding to a symbol unit in the preset frequency band, and allocating frequency resources to data, the frequency resources corresponding to a sum of the first offset and the second offset.

Apparatus and method for allocating frequency resources in mobile communication system

A method and HARQ memory apparatus in a BWA communication system are provided where the HARQ memory apparatus includes a memory configured to partition the entire memory area in units of slots corresponding to the size of a concatenation block, to input/output a plurality of channel data to the slot in units of the concatenation block, to store a new concatenation block in an empty slot, and to combine a retransmitted concatenation block with a prestored concatenation block and store the combined concatenation block at a prestored location. Accordingly, the required amount of memory can be reduced by using a buffer efficiently. In particular, when a memory is embedded in an integrated circuit, the size and power consumption of the integrated circuit can be reduced.

Apparatus and method for controlling hybrid ARQ memory in broadband wireless access communication system

An apparatus and method for initial fractional frequency offset estimation are provided. In an apparatus for estimating an initial fractional frequency offset in a Broadband Wireless Access (BWA) communication system, the apparatus includes a sample power calculator for calculating a power of input sample data and for calculating an average power of a specific symbol, a power threshold comparator for comparing the sample data power in magnitude with the average power of the specific symbol and for outputting one of an accumulation ON and OFF signal, a first buffer for correlating a last data of the sample data with the sample data and for storing sample data corresponding to a preset number of correlation results, a second buffer for storing sample data corresponding to correlation results other than the sample data stored in the first buffer; and an accumulator for allowing accumulation of sample data stored in the second buffer if the power threshold comparator outputs the accumulation ON signal.

Apparatus and method for initial fractional frequency offset estimation in a broadband wireless access communication system

A scheduling method is provided for processing data in a communication system. The method includes performing downlink MAP (DL-MAP) decoding; generating a configuration table through the DL-MAP decoding; and processing data in a predetermined unit according to the generated configuration table.

Apparatus and method for scheduling data in a modem

Provided is a channel estimation apparatus and method. In the channel estimation apparatus, a channel estimator performs channel estimation onto a received symbol and output a channel estimation result. The channel estimation result is stored in an estimation buffer along with a channel estimation result compensated in a preamble phase compensator. The preamble phase compensator receives a channel estimation result for pilot subcarriers of a data symbol and a preamble channel estimation result from the estimation buffer, acquires a phase rotation value between them, and compensates the preamble channel estimation result with the phase rotation value. When FCH and DL-MAP are demodulated, pilot subcarriers in the NPUSC symbol have been used to estimate the channel of the Nth PUSC symbol.

Apparatus and method for channel estimation for data demodulation in broadband wireless access system

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Seongnam-si, South Korea

Bong-Gee Song