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Pre-coding method for MIMO system of 8 transmitting antennas

A transmit antenna and precoding technology, applied in the direction of preventing/detecting errors through diversity reception, can solve the problems of poor codebook performance and inappropriate granularity selection, and achieve the effect of reducing feedback overhead

Inactive Publication Date: 2011-02-09
HUAZHONG UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0011] Based on the above design criteria, Samsung designed a set of codebooks, but the C 2 The granularity of the codebook is not properly selected, which makes the codebook perform poorly in MU-MIMO

Method used

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  • Pre-coding method for MIMO system of 8 transmitting antennas
  • Pre-coding method for MIMO system of 8 transmitting antennas
  • Pre-coding method for MIMO system of 8 transmitting antennas

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Embodiment Construction

[0031] The core innovation of the present invention lies in the form of the codebook, and the origin and characteristics of the codebook of the present invention will be mainly explained below.

[0032] When the number of transmitting antennas is 8 (8Tx), the dual-polarized antenna configuration is the preferred antenna scenario during design, so when designing 8Tx, the + / - 45-degree dual-polarized antenna scenario is mainly considered.

[0033] For dual-polarized antennas, the transmit correlation matrix H H H has the following block diagonal form:

[0034] H H H = A B B A - - - ( 2 )

[0035] A and B are matrices.

[0036] In a strongly correlated channel, B tends to be a zero matrix, s...

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Abstract

The invention provides a pre-coding method for an MIMO (multi-input multi-output) system of 8 transmitting antennas. A dual code text is adopted in the method, and the dual code text is determined by selectively succeeding partial code words of LTE (long term evolution) and then performing certain extension. The method for pre-coding by using the dual code text reduces the feedback overhead of the system, acquires good performance gain, and is suitable for a multi-user multi-input multi-output (MU-MIMO) system.

Description

technical field [0001] The invention relates to the technical field of multiple-input multiple-output (MIMO) communication, in particular to a precoding method for an MIMO system with 8 transmitting antennas. Background technique [0002] In closed-loop MIMO transmission, the receiving end feeds back channel state information to the transmitting end, and the transmitting end performs precoding processing based on the feedback information before transmitting data, which can effectively improve system performance. [0003] In long-term evolution (Long Term Evolution, LTE) closed-loop space division multiplexing, linear precoding technology is used, that is, known spatial channel information is used at the transmitting end to perform precoding processing, thereby improving system and user throughput. The linear precoding operation can be expressed as: [0004] y=HWx+n (1) [0005] y is the receiving vector at the receiving end, x is the transmitting vector at the sending end,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06
Inventor 王德胜程章敏付代宇吕伟喻莉屈代明吴伟民林宏志程文迪
Owner HUAZHONG UNIV OF SCI & TECH
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