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Enhanced signal multiplexing method for multi-send and multi-receive systems based on compressed sensing

A technology of compressed sensing and signal enhancement, applied in the field of mobile communication, to achieve the effect of convenient implementation, meeting application requirements and small modification

Inactive Publication Date: 2018-06-19
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

But at the same time, it is not difficult to find that the existing research on the precoding matrix under MIMO conditions has rarely studied the enhanced Multi-send and multi-receive system multiplexing technical solution

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  • Enhanced signal multiplexing method for multi-send and multi-receive systems based on compressed sensing
  • Enhanced signal multiplexing method for multi-send and multi-receive systems based on compressed sensing
  • Enhanced signal multiplexing method for multi-send and multi-receive systems based on compressed sensing

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Embodiment Construction

[0039] The specific implementation steps of the present invention will be described in detail below in conjunction with the MIMO system.

[0040] We first consider the case of single-user MIMO. Traditional single-user spatial multiplexing MIMO systems such as figure 1 As shown, the coded and modulated sender signal x=[x 1 , x 2 ,...,x M ] T After being processed by the spatial multiplexing module SpatialMultiplexing of the sending end, it is sent out simultaneously through the Nt transmitting antennas of the sending end, where M=min{N t , N r}. After the receiving end is processed by the spatial demultiplexing module Spatial Demultiplexing, it detects and restores the sending end signal from the signals received by the Nr receiving antennas

[0041] MIMO enhanced signal multiplexing system using compressive sensing such as figure 2 shown. and figure 1 Compared with the traditional single-user MIMO system shown, in addition to the spatial multiplexing module Spatia...

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Abstract

The invention discloses a method for enhancing signal multiplexing in a multi-transmit and multi-receive system based on compressed sensing. On the basis of the existing MIMO technology and the existing related MIMO system signal multiplexing technology, the compressed sensing technology is selected. The random measurement matrix is ​​used as the signal compression multiplexing matrix, and then make full use of the sparse characteristics of the sending signal on the over-complete redundant dictionary, and solve the high-dimensional Sending signals, thereby greatly improving the signal multiplexing gain under the condition of a given number of transmitting and receiving antennas in the MIMO system, better meeting the application requirements of the MIMO system for broadband transmission, and having a mature optimized reconstruction algorithm that ensures the use of compressed sensing at the receiving end The multi-channel data stream sent by the transmitting end through compression and multiplexing steps can be reconstructed with high probability, and the advantages of small modification to the existing MIMO system are achieved.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a design of a signal multiplexing matrix and a signal detection method of a multiple-input multiple-receive MIMO system based on compressed sensing. Background technique [0002] Multiple-Input Multiple-Output (MIMO) technology uses multiple transmitting antennas and multiple receiving antennas to make full use of space resources, which can effectively improve the frequency band utilization of wireless communication systems and increase the coverage of wireless systems. The MIMO technology is an effective method for obtaining spatial gain, where the spatial gain includes spatial multiplexing gain (Spatial-multiplexing Gain) and spatial-diversity gain (Spatial-diversity Gain). Spatial multiplexing gain means that in a rich spatial fading and scattering channel environment, the fading link gains between each transmitting antenna and receiving antenna pair are independent of each...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0697
Inventor 刘婵梓陈庆春唐小虎
Owner SOUTHWEST JIAOTONG UNIV
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