Automatic retransmission requesting method using channel decomposition, and transmit/receive processing unit

Abstract

The invention provides a mixing automatic re-transfer request method based on the multi-antenna input and output channel decomposition, which comprises a receiving end used to a do geometric average decomposition to the channel matrix to obtain the pre-code matrix and the adjusting zero weight generating matrix; it feedbacks the pre-code matrix to the sending end and uses the adjusting zero weight generating matrix to generate the least mean square error adjusting zero weight vector; it dose forward error correction coding to the sending data package, adds the cyclic redundancy check and uses pre-coding matrix to pre-code the sending data package at the sending end; it uses each sub channel receiving signal and the corresponding adjusting zero weight vector and sub channel gain to obtain each sub channel receiving signal and then dose forward error correction decoding, it uses cyclic redundancy check to check the sectionalization quality at the receiving end; if the data sectionalization has error, retransfer it and stores the error sectionalization at the receiving end, groups the error retransfer data and decodes after amalgamating it with the buffer storage group.

Description

technical field [0001] The invention relates to a multi-antenna wireless communication system, in particular to a hybrid automatic repeat request method and a sending / receiving processing unit utilizing channel decomposition features. Background technique [0002] With the gradual integration of wireless network, multimedia technology and the Internet, people have higher and higher requirements for the type and quality of wireless communication services. In order to meet the requirements of wireless multimedia and high-speed data transmission, it is necessary to develop a new generation of wireless communication system. In the new generation of wireless systems, some new technologies will be widely used from the physical layer, media access control layer to the network layer, among which multiple antenna input and output (MIMO), hybrid automatic repeat request (HARQ) and so on have attracted extensive attention. [0003] The MIMO system refers to the use of multi-element an...

AI Technical Summary

Problems solved by technology

[0005] There are two implementation schemes for HARQ applied to MIMO systems. One method is to perform forward error correction coding (FEC) and add cyclic redundancy check (CRC) to each antenna branch after data packets are multiplexed to all antenna branches. ), the performance of this method is better, but it needs to insert, control and other operations for each branch, so the complexity is high

Another method is to perform FEC and add CRC before data packets are multiplexed to the antenna. This method has low complexity, but its performance is lower than the former

Because this method applies the same CRC to each antenna branch, since the gain of each branch channel is different, the CRC error of a subchannel with a poor channel gain will lead to the retransmission of all antenna branch bit streams, reducing the performance of the entire system

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