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Uplink detection method based on MCMC technology in large-scale MIMO system

A link detection, large-scale technology, applied in transmission systems, digital transmission systems, radio transmission systems, etc., can solve problems such as high computational complexity and low computational complexity

Inactive Publication Date: 2015-10-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high computational complexity of existing detection methods based on MCMC technology in the current large-scale MIMO system, and to provide a detection method based on MCMC technology with low computational complexity and performance similar to the performance of the maximum likelihood detection method. Detection method

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  • Uplink detection method based on MCMC technology in large-scale MIMO system
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  • Uplink detection method based on MCMC technology in large-scale MIMO system

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[0042] The present invention is described in detail below in conjunction with accompanying drawing

[0043] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be specially reminded that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions are omitted here.

[0044] In order to describe the present invention better, the terminology and massive MIMO system receiver structure used in this embodiment are introduced first. Massive MIMO systems: such as figure 1 As shown, b is the bit data to be transmitted, which can be regarded as an L×T matrix, where L=log2(4) is the bit carried by a quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK) symbol quantity. Such as figure 2 Shown provides an nTx root transmi...

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Abstract

The invention belongs to the technical field of communication anti-jamming, and provides an uplink detection method based on a MCMC technology in a large-scale MIMO system to solve the problem that an existing detection method based on the MCMC technology is high in computational complexity. According to the invention, by setting threshold judgment, the number of blind iterations can be effectively reduced, and the computational complexity can be lowered. Moreover, a mixed distribution of a real distribution containing a sending signal and a distribution containing prior information of the sending signal is adopted for sampling, which can effectively improve the bit error rate performance of the system.

Description

technical field [0001] The invention belongs to the technical field of communication anti-jamming, and relates to large-scale MIMO (Multiple Input Multiple Output) technology, M-H (Metropolis-Hastings) technology, simulated annealing technology, Gibbs sampling technology, specifically a MCMC-based technology in a large-scale MIMO system Uplink detection method. Background technique [0002] Massive MIMO technology is a high-speed transmission technology in a wireless environment. It configures more antenna units at the transmitting end and receiving end, and combines advanced space-time coding and modulation schemes. By making full use of the spatial freedom, it can bring for additional diversity, multiplexing and beamforming gain. [0003] In massive MIMO systems, the detection method based on Markov Monte Carlo (MCMC) technology should be one of the detection methods with the best comprehensive performance among the existing detection methods. The bit rate performance is...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04W24/00H04L12/26
CPCH04B7/0413H04L43/16H04W24/00
Inventor 喻凤雷霞肖丽霞肖悦蒋兆翔陈昱树
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA