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Detection method for multi-user signal in large-scale multi-antenna system

A technology of a multi-antenna system, detection method, applied in transmission systems, digital transmission systems, preventing/detecting errors through diversity reception, etc.

Active Publication Date: 2015-05-13
TSINGHUA UNIV
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Problems solved by technology

However, due to the limitation of space range and construction cost, it is impossible for BS to adopt infinite antenna configurations in actual scenarios. Therefore, a linear detection algorithm with low complexity and close to optimal detection performance remains to be studied.

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  • Detection method for multi-user signal in large-scale multi-antenna system
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  • Detection method for multi-user signal in large-scale multi-antenna system

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Embodiment Construction

[0040] The method for detecting multi-user signals in a large-scale multi-antenna system proposed by the present invention has a flow chart as shown in figure 2 As shown, the detection method includes the following steps:

[0041] (1) Assuming that the number of base station antennas in the large-scale multi-antenna system is N, the number of users is K, and each user is equipped with one antenna, then the uplink channel matrix of the large-scale multi-antenna system is in Represents the complex domain, and the transmitted signals of K users in T time slots are where R is the coding rate of the user signal, and the transmitted signal S is channel coded, interleaved and symbol mapped to obtain the antenna transmitted signal, denoted as The power of the signal transmitted by the antenna is In one embodiment of the present invention, the code rate can be Turbo code, the encoding method can be convolutional code or low-density parity-check code, and the symbol mapping met...

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Abstract

The invention relates to a detection method for multi-user signal in a large-scale multi-antenna system and belongs to the technical field of wireless communication. The method adopts the obtained CSI to detect the multi-user information at the base station side. The method has low complexity and good error bit rate performance, which is close to the error bit rate performance of the optimal MMSE detection within a few iterations. The method adopts the Lanczo iterative algorithm for obtaining the system of linear equations for avoiding the mode of obtaining MMSE orthogonal matrix by directly using large-scale matrix inversion mode, the detection calculating complexity is greatly reduced; in addition, the method can calculate LLR value of each information bit in lower complexity as the input of the decoder and the joint detection decoding performance is obviously improved. The complexity is obviously reduced while the ratio of the user number K and the base station antenna number N is certain and the number tends to infinity, and the error bit rate performance can gradually reach to the maximum likelihood detection (optimal) performance.

Description

technical field [0001] The invention relates to a multi-user signal detection method in a large-scale multi-antenna system, in particular to a low-complexity multi-user detection method in a large-scale multi-antenna system based on a Lanczos algorithm, and belongs to the technical field of wireless communication. Background technique [0002] With the rapid increase in the number of mobile terminals, the development of the Internet of Things, and the increasing types of wireless data services, users' demands for wireless data services continue to pose new challenges to existing mobile communication technologies. As a technology with the potential to meet the spectrum efficiency, energy efficiency and channel capacity requirements of future wireless mobile communications, massive multiple-input multiple-output (hereinafter referred to as Massive MIMO) technology has attracted widespread attention in academia and industry. [0003] The Massive MIMO technology provides enough ...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/06
CPCH04L1/00
Inventor 粟欣曾捷肖驰洋肖立民赵明王京
Owner TSINGHUA UNIV
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