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Multipoint-multiuser uplink low-complexity MIMO (Multiple Input Multiple Output) detection method

A low-complexity, detection-method technology, applied in the direction of preventing/detecting errors through diversity reception, diversity/multi-antenna systems, space transmit diversity, etc., and can solve problems such as reducing computational complexity

Inactive Publication Date: 2011-10-12
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to propose a multi-point-multi-user uplink low-complexity MIMO detection method for the deficiencies of the grouping interference suppression GIS technology and the full-space maximum likelihood detection algorithm, so as to ensure that the same-frequency user signals can be effectively separated Under this condition, the full diversity gain is obtained and the computational complexity is reduced

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  • Multipoint-multiuser uplink low-complexity MIMO (Multiple Input Multiple Output) detection method

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[0057] 1. Description of related symbols

[0058] GIS (Group Interference Suppression) group interference suppression;

[0059] MIMO (Multiple Input Multiple Output) multiple input multiple output;

[0060] CoMP (Coordinated Multi-Point) coordinated multi-point transmission technology;

[0061] The number of K UE cooperative sets;

[0062] The total number of antennas of N K UEs;

[0063] The total number of antennas of M RRU;

[0064] C is the signal sent by the sender;

[0065] C k Is the transmitted symbol of user set k (1≤k≤K);

[0066] N k Is the number of antennas in the k-th user set;

[0067] y is the signal received by the receiving end;

[0068] H is the multipoint-multiuser multi-MIMO channel matrix;

[0069] Is the interference channel matrix of user set k;

[0070] H (k) Is the MIMO channel transmission matrix of the transmission point and the k-th user set;

[0071] W is the total precoding matrix;

[0072] W (k) Is the precoding matrix corresponding to the kth user set;

[0073] N ...

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Abstract

The invention discloses a multipoint-multiuser uplink low-complexity MIMO (Multiple Input Multiple Output) detection method which is mainly used for solving the problem that full diversity gain cannot be acquired in the conventional user detection method. The implementation process of the method comprises the following steps of: constructing an interference channel matrix of each user set by a receiving end according to an MIMO channel matrix estimated by a receiver, and searching an orthogonal normalized matrix in a null space of the interference channel matrix to realize separation of signals of different user sets; performing independent MIMO detection on each user set by using a corresponding MIMO detection method according to an encoding mode adopted by a transmitting end to acquire intermediate detection results with partial diversity gain of different users in the same user set; and finally iterating the intermediate detection results to acquire the final detection result with full diversity of each user. The method has the advantages of low overall complexity and capability of acquiring the full receiving diversity gain while realizing separation of the signals of different user sets, and can be used for multipoint-multiuser uplink user detection.

Description

Technical field [0001] The invention belongs to the field of wireless communication technology, and relates to group interference suppression GIS, low-complexity MIMO detection and parallel interference cancellation technology. It can be used to solve the separation of the same frequency user set in the multipoint-multiuser uplink cooperative communication and the low-complexity MIMO detection, which can obtain the full diversity gain. Background technique [0002] With the evolution to IMT-Advanced technology, a series of new wireless technologies have emerged in order to meet the ever-increasing service quality requirements of users in the future, especially to cover edge users. Multi-antenna enhancement is one of them, mainly including base stations Distributed antenna setup, cooperative transmission / reception, cooperative beam switching, distributed precoding, multiple input and multiple output MIMO mode selection, etc. Many key issues involved in these enhanced technologies...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B7/08H04L25/02H04L1/06
Inventor 张海林李勇朝刘毅汤莹秦百爽董晨胡梅霞
Owner XIDIAN UNIV
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