Joint list detection and decoding method for fixing complexity of block codes

Abstract

The invention relates to a joint list detection and decoding method for fixing the complexity of a multiple input multiple output (MIMO) wireless communication system adopting block codes. The method comprises the following steps of: producing a candidate input code word list of a channel decoder from a candidate list of an MIMO detector by using a list generator so as to avoid iterative processing of a conventional detection and decoding algorithm; replacing soft decoding by hard decoding to reduce the working complexity of a receiving end; and joint processing is performed by using the list generator and the encoder to realize a uniform candidate character sequence space structure under joint constraint of an MIMO signal space and a code word space so as to improve system performance. The invention provides a new joint detection and decoding processing technical scheme which is used for the receiving end and designed by adopting the block codes in a channel coding scheme in the MIMO system. The method reduces calculation complexity and improves detection performance.

Description

technical field [0001] The invention relates to a joint list detection and decoding method aimed at fixed complexity of block codes, and belongs to the technical field of wireless communication of MIMO systems. Background technique [0002] Due to the explosive development of mobile communications, wireless communication systems are facing challenges such as increasing wireless link transmission rates and scarce spectrum resources. Multiple-input multiple-output (MIMO) technology uses multiple transmitting antennas and multiple receiving antennas for wireless transmission. It can double the system capacity and spectrum efficiency without increasing the transmission power and spectrum resources, so it has become the future One of the key technologies of wireless communication. [0003] The MIMO detection algorithm determines the performance of the MIMO system to a large extent. In order to obtain the full diversity and / or full multiplexing gain of the MIMO scheme, the maximu...

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Problems solved by technology

However, the candidate lists of the two are selected independently, which increases the complexity of the system processing

[0012] Second, the decoder in the prior art performs decoding according to an optimal detection sequence output by the detector to obtain the final result; however, although the codeword sequence sent to the decoder is the optimal detection sequence in the detection space sequence, however, it may not be the optimal sequence in the codeword space; therefore, decoding only one optimal detection sequence of the detection output will degrade the system performance when the number of iterations is small

[0013] Third, the existing technology improves the results of detection and decoding by iteratively updating and exchanging extrinsic information between the detector and decoder, thereby improving system performance; however, multiple iterative operations of detection and decoding will naturally The computational complexity of the system is high

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