Signal detection method and device of MIMO (multiple input multiple output) system

A signal detection and symbol technology, which is applied in the signal detection field of MIMO system, can solve the problems of high computational complexity of the breadth-first algorithm, reduce the number of reserved nodes, and limit the number of visited nodes, so as not to reduce the detection performance, and the hardware implementation circuit is simple , the effect of low power consumption
CN102723975AInactive Publication Date: 2012-10-10PEKING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
PEKING UNIV
Publication Date
2012-10-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of signal detection and discloses a signal detection method and device of an MIMO (multiple input multiple output) system, wherein the method comprises the following steps: S1. constructing a search tree by utilizing a known channel matrix; S2. searching the Nth layer of the search tree; S21. dividing K nodes into M groups; S22. expanding sub nodes of the Nth layer of code according to the principle that the number of expanding sub nodes in all group of nodes are equal, and the number of expanding sub nodes in different groups of nodes is decreased sequentially from M; S23. sequencing according to the Euclidean distance between partial receiving vectors and partial transmitting vectors corresponding to all expanding sub nodes, and reserving K sub nodes of which the Euclidean distance is less than the threshold for the search of next layer; and S3. searching all the layers completely according to the modes of the steps S21-S23, and searching for the path with the minimum Euclidean distance from the paths consisting of sub nodes as the search results. According to the invention, the signal detection complexity is lowered and the detection efficiency of data receiving is improved.
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Description

technical field

[0001] The present invention relates to the technical field of signal detection, in particular to a signal detection method and device for a MIMO system. Background technique

[0002] Multiple-input multiple-output (MIMO) technology can double the transmission rate without increasing the frequency band. Today, frequency resources are increasingly tight. Therefore, MIMO technology is considered to be the most important physical layer technology in the next generation of broadband wireless communication technology. one.

[0003] In a MIMO system, in order to improve the reliability of source information transmission, at the sending end, the signal to be transmitted is firstly subjected to channel coding that can provide error correction capabilities, and then space-time / space-frequency / space-time-frequency coding, and then multiple The transmitting antennas transmit at the same time or in a certain time sequence. At the receiving end, the signals from the sen...

Claims

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