Abstract:
PURPOSE: An apparatus for transmitting transmission rate related information for receiver selection in a multi cell MIMO downlink network and a method thereof, a receiver selection apparatus in the multi cell MIMO downlink network and a method thereof and a system thereof are provided to transmit the transmission rate related information for receiver selection in the multi cell MIMO downlink network which can achieve maximum sum transmission rate by calculation of low complexity only. CONSTITUTION: A receiving part (410) receives a pilot signal from a transmitter. A calculation part (420) calculates approximated sum transmission rate information by assuming a nonlinear receiver on the basis of the received pilot signal. The calculation part calculates the approximated sum transmission rate, by assuming the nonlinear receiver on the basis of the sum of variation matrix of other receivers existing in a currently belonging receiver group and variation matrix of a self-designated signal. A transmission part (430) transmits the approximated sum transmission rate information to the transmitter. [Reference numerals] (410) Receiving part; (420) Calculation part; (430) Transmission part; (440) Communication execution part
Abstract:
PURPOSE: A method of encoding and decoding dispersed source is provided to improve error correction capability of newly comprised LDPC code. CONSTITUTION: A dispersed source coding apparatus (1300) comprises: an encoder (1310), a transmitter (1320), a syndrome divider (1330), and a source opening unit (1340). The encoder encodes the second information, and produces compression syndrome of the first information based on the first information or parity check matrix of low density parity check (LDPC) code. The transmitter transmits the encoded second information or compression syndrome of the first information to a decoding apparatus. The syndrome divider partitions and transfers the compression syndrome in case of receiving feedback information of reconstitution failure under number k which is set in advance. The source opening unit transfers specific bit of the first information to the decoding apparatus in case of receiving feedback information of reconstitution failure over the number k. [Reference numerals] (1310) Encoder; (1320) Transmitter; (1330) Syndrome divider; (1340) Source opening unit
Abstract:
PURPOSE: A communication device for a network using a distributed interference alignment technique and a distributed interference alignment method are provided to reduce the number of repetitive transmission of channel information for distributed interference alignment without degrading a sum rate by stopping repetitive transmission in a period when a sum rate is optimized. CONSTITUTION: A reception unit(910) receives a signal including channel information from a plurality of transmission devices. A calculation unit(920) forms an interference suppression matrix minimizing the interference of a signal. The calculation unit calculates the formed interference suppression matrix in the signal. A determining unit(930) determines whether the interference alignment of the signal is stopped or not based on interference signal power and sum rate of the signal calculated by the interference suppression matrix. [Reference numerals] (900) Communication device for a network using distributed interference alignment technique; (910) Reception unit; (920) Calculation unit; (930) Decision unit; (940) Transmission unit
Abstract:
PURPOSE: An efficient icon rearrangement method for HARQ transmission and a device thereof, packet transmission method, and a method thereof are provided to select icon coordinates which rapidly improves a diversity profit with simple mathematical equation. CONSTITUTION: A standard Gray symbol mapping of an icon coordinate is set up(110). A position of each bit of a symbol changes through LLR value of each bit of each symbol on the basis of icon symbol according to the set-up symbol mapping. An icon rearrangement device designs a Gray mapping of first transmission. An icon coordinate is rearranged(120) by finding the optimal icon coordinate. [Reference numerals] (110) Setting standard Gray symbol mapping of an icon coordinate; (120) Changing the position of each bit of a symbol through an LLR value of each bit of each symbol on the basis of an icon coordinate according to the set-up symbol mapping to find the optimal icon coordinate and rearranging the icon coordinate; (AA) Start; (BB) End
Abstract:
PURPOSE: A decoding sequence controlling apparatus and a method thereof are provided to calculate summation values of data transfer rates when considering all decoding sequences and to determine a decoding sequence. CONSTITUTION: A transfer rate calculating unit(155) calculates data transfer rates by adding a first CQI(Channel Quality Indicator) table and a second CQUI table. The first CQI table is matched with an effective SNR of a first layer. The second CQI table is matched with an effective SNR of a second layer. A decoding sequence controlling unit(156) compares the totaled data transfer rates. The decoding sequence controlling unit determines a decoding sequence.
Abstract:
본 발명은 데이터의 부호화에 관한 것으로, 특히 저밀도 패리티 검사(LDPC) 부호의 생성 방법 및 장치에 관한 것이다. LDPC 부호의 생성 방법은, 길이 K의 정보 시퀀스를 길이 N의 부호어로 부호화하기 위해, 검사 노드들에 대한 (NK)개의 행들과 변수 노드들에 대한 N개의 열들을 가지는 패리티 검사 행렬을 구성하는 과정과, 상기 패리티 검사 행렬을 K개의 열들을 가지는 정보 부분 행렬과 (NK)개의 열들을 가지는 패리티 부분 행렬로 분할하는 과정과, 상기 패리티 부분 행렬을 P*P의 크기를 가지는 부블록들로 분할하는 과정과, 상기 패리티 부분 행렬의 제1 대각 부분과, 상기 제1 대각 부분으로부터 부블록 천이량 f만큼 천이된 제2 대각 부분을 결정하는 과정과, 상기 제1 대각 부분과 제2 대각 부분의 부블록들에 천이 인덱스들을 가지는 천이된 단위행렬들을 각각 배치하는 과정과, 상기 제1 및 제2 대각 부분들을 제외한 나머지 부블록들을 영행렬로 채우는 과정과, 상기 패리 티 부분 행렬의 하나의 부블록 열에, 하나의 1만을 포함하고 나머지 원소들은 모두 0인 델타 행렬들을 배치하는 과정과, 상기 패리티 검사 행렬을 저장하는 과정을 포함한다. LDPC codes, Parity Check Matrices, Identity matrix, delta matrix, degree, encoding
Abstract:
A method and an apparatus for processing received data in a wireless broadband communication system are provided to increase a data process speed by processing the received data based on a symbol unit. A control information decoder(1214) receives control information for one frame data having plural bursts and decodes the control information. A controller(1212) extracts a burst size of the bursts and modulation scheme information for the frame from the control information and allocates burst IDs for the bursts. The controller adds burst partial IDs to data fragments having a fragment size corresponding to the modulation scheme information and the burst size. A decoder(1210) divides one slot data into the data fragments and decodes the respective data fragments. A burst memory(1216) includes burst regions for storing the data fragments according to the burst IDs. The burst memory sequentially stores the decoded data fragments according to the burst IDs and the burst partial ID.
Abstract:
An apparatus and a method for encoding a convolutional turbo code in a broadband wireless access communication system are provided to perform a fast encoding by minimizing additional hardware and control complexity in an IEEE 802.16 communication system. An apparatus for encoding a convolutional turbo code in a broadband wireless access communication system includes a first buffer unit, a first convolutional turbo encoding unit, a second buffer unit, a second convolutional turbo encoding unit, an output storing unit, and a controlling unit. The first buffer unit stores an n-th data block which is randomized. The first convolutional turbo encoding unit performs convolutional turbo encoding for the data output by the first buffer unit. The second buffer unit stores an n+1-th data block which is randomized during the convolutional turbo encoding of the first convolutional turbo encoding unit. The second convolutional turbo encoding unit performs the convolutional turbo encoding for the data output from the second buffer unit. The output storing unit stores the data outputted from the first and second convolutional turbo encoding units. The controlling unit orders the data input/output and processing of the first and second buffer units, the first and second convolutional turbo encoding units, and the output storing unit.
Abstract:
본 발명은 이동통신 시스템에서 채널 복호기에서 반복 복호 정지 장치 및 방법에 관한 것으로, 특히 터보 부호의 반복 복호에 있어 HDA(hard-decision aided)법을 사용함에 있어서, CRC(cyclic redundancy check) 부호화를 통하여 HDA기법에 필요한 메모리를 최소화 할 수 있는 장치 및 방법에 관한 것이다. 본 발명의 실시 예에 따른 방법은 이동통신 시스템에서 반복 복호 정지 방법에 있어서, 수신된 신호를 요소 복호화하여 출력하는 과정과, 상기 요소 복호화된 신호를 경판정하여 출력하는 과정과, 상기 경판정된 신호를 CRC(cyclic redundancy check) 부호화하여 패리티를 출력하는 과정과, 상기 CRC 부호화된 패리티의 동일 여부를 판단하고, 동일 여부에 따라 반복 복호 정지를 결정하는 과정을 포함함을 특징으로 한다. 반복 복호, 경판정, CRC(cyclic redundancy check)