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Receiver detection method assisted by lattice reduction algorithm and applied to wireless MIMO system

A technology of lattice reduction and detection methods, applied in the direction of preventing/detecting errors through diversity reception, baseband system components, transmission systems, etc., can solve problems such as deteriorating the performance of search tree detection algorithms

Inactive Publication Date: 2015-04-29
SHANGHAI JIAO TONG UNIV +1
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Problems solved by technology

But in practical scenarios, the correlation between channel basis vectors will deteriorate the performance of the search tree detection algorithm

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  • Receiver detection method assisted by lattice reduction algorithm and applied to wireless MIMO system
  • Receiver detection method assisted by lattice reduction algorithm and applied to wireless MIMO system
  • Receiver detection method assisted by lattice reduction algorithm and applied to wireless MIMO system

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[0079] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0080] The invention provides a receiver detection method of a MIMO system assisted by a lattice-based reduction algorithm, comprising the following steps: performing translation and scaling on a received signal vector y, and obtaining a translated and scaled received signal vector For the original channel matrix H, through the LLL algorithm, a channel matrix with better orthogonality than the original channel matrix H is obtained and the transformation matrix T, for Perform QR decomposition t...

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Abstract

The invention provides a receiver detection method assisted by the lattice reduction algorithm and applied to a wireless MIMO system. The receiver detection method assisted by the lattice reduction algorithm and applied to the wireless MIMO system comprises the steps that horizontal moving and zooming are conducted on a receiving vector; a new channel matrix is obtained through the lattice reduction algorithm; in the layer where detection is started, integers within a certain value range are selected to serve as K optimum nodes of the layer; in the other layers, K optimum nodes of each layer are selected according to the method for expanding child nodes by means of father nodes and the candidate least heap sorting algorithm; for the K optimum nodes of the first layer, proper nodes are selected according to specific judgment conditions, and an original sending symbol is obtained by means of a left multiplication transformation matrix through horizontal moving and zooming. According to the receiver detection method assisted by the lattice reduction algorithm and applied to the wireless MIMO system, during multiple-input-multiple-output detection, the lattice reduction assisting algorithm is adopted, the influence of channel correlation on a multiple-input-multiple-output detector is reduced, and the detection performance is improved compared with a detector not based on the lattice reduction assisting algorithm.

Description

technical field [0001] The invention relates to a method in the technical field of wireless communication, in particular to a receiver detection method of a wireless MIMO system assisted by a lattice-based reduction algorithm. Background technique [0002] In the field of wireless communication, a multiple-input multiple-output (MIMO) system using multiple transmit and receive antennas is one of the most important advances in wireless technology in recent years. MIMO technology provides huge gains in data rate, signal reliability, etc., making it chosen by many top wireless standards. MIMO detection techniques have a great impact on achieving system performance gains. The goal of a MIMO detector is to make observations of the transmitted symbol vector given the received signal vector. Different MIMO detection algorithms can achieve this function. Based on the degree of correlation between their detection accuracy, these detection algorithms can be divided into three categ...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L1/00H04L1/06
Inventor 赵普楼亦厦俞晖邱梦婷王乃博
Owner SHANGHAI JIAO TONG UNIV
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