Acceptance detection method and device based on LDPC-MIMO (low density parity check-multiple input multiple output) communication system
A technology of a communication system and a detection method, which is applied in the field of communication, and can solve problems such as the degradation of channel decoding performance and the inability of MIMO detection methods to provide soft decision information, etc.
Active Publication Date: 2014-09-10
ZTE CORP
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[0006] The present invention is proposed for the problem that the grid reduction algorithm-assisted MIMO detection method in the related art cannot provide soft decision information, which reduces the performance of channel decoding. Therefore, the main purpose of the present invention is to provide a communication system based on LDPC-MIMO A receiving detection method and device to solve at least one of the above-mentioned problems
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[0018] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0019] Functional Overview
[0020] Aiming at the problem that the grid reduction-assisted MIMO detection method in the related art cannot provide soft decision information, which reduces the performance of channel decoding, the present invention provides a receiving detection method and device based on an LDPC-MIMO communication system. The basic scheme is as follows: At the receiving end, the lattice reduction algorithm is combined with the MIMO detection algorithm, and soft-decision LDPC decoding is used to realize the output of soft bit information, which improves the performance of soft-decision LDPC decoding, thereby significantly improving the communication system based on LDPC-MIMO. receiver...
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The invention provides an acceptance detection method and device based on an LDPC-MIMO (low density parity check-multiple input multiple output) communication system. The acceptance detection method comprises the following steps: obtaining conversion transmission signal vector estimation; according to the conversion transmission signal vector estimation, generating a conversion transmission signal vector assembly; according to the conversion transmission signal vector assembly and a transfer matrix, obtaining a transmission signal vector; carrying out constellation diagram effectiveness detection on the transmission signal vector to obtain an effective transmission signal vector, wherein the transfer matrix is obtained by adopting a reduced concept lattice for a channel matrix; according to the effective transmission signal vector, calculating a bit logarithm likelihood ratio; decoding the bit logarithm likelihood ratio by a soft decision LDPC decoding algorithm; and obtaining a transmission message sequence. Thus, the output of soft bit message is improved by the invention; in addition, in the invention, the soft decision LDPC decoding performance is improved so as to obviously improve receiver detection performance based on the LDPC-MIMO communication system.
Description
technical field [0001] The present invention relates to the communication field, in particular, to a receiving detection method and device based on an LDPC-MIMO communication system. Background technique [0002] In wireless communication systems, channel coding technology is usually used to ensure the transmission reliability and anti-interference ability of information data in wireless channels. Among many current channel coding techniques, LDPC code is one of the methods with the best error correction performance. Adopted and applied in IEEE802.16 standard and CMMB standard, it is very promising to replace Turbo code and become the preferred channel coding solution for data services in the process of formulating 4G wireless communication system standard in the future. [0003] In addition, MIMO technology is one of the key technologies for improving wireless communication performance at present and in the future. It is widely used in WCDMA, IEEE802.16, 3GPP LTE and other...
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IPC IPC(8): H04L1/06H04L1/00
Inventor 包国平吴岩巍孙芝利袁志锋徐俊
Owner ZTE CORP