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Enhancement signal multiplexing technique of multiple-input multiple-output system based on compressive sensing

A technology of compressed sensing and multiplexing technology, which is applied in the field of signal multiplexing matrix design and signal detection, to achieve small modification, improve signal multiplexing gain, and meet application requirements

Inactive Publication Date: 2016-05-25
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

Method used

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  • Enhancement signal multiplexing technique of multiple-input multiple-output system based on compressive sensing
  • Enhancement signal multiplexing technique of multiple-input multiple-output system based on compressive sensing
  • Enhancement signal multiplexing technique of multiple-input multiple-output system based on compressive sensing

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Embodiment Construction

[0042] The specific implementation steps of the present invention will be described in detail below in conjunction with the MIMO system.

[0043] 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 at the sending end t The root transmitting antennas send out at the same time, where M=min{N t , N r}. After being processed by the spatial demultiplexing module SpatialDemultiplexing at the receiving end, from N r The signal received by the root receiving antenna is detected and restored to obtain the signal at the sending end x ^ = [ x ^ 1 , x ...

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Abstract

The invention discloses an enhancement signal multiplexing technique of a multiple-input multiple-output system based on compressive sensing. On the basis of the existing MIMO technique and the existing related signal multiplexing technique of the MIMO system, a random measuring matrix in a compressive sensing technique is taken as a signal compressive multiplexing matrix; the sparse characteristic of the sending signals displayed on an overcomplete redundant dictionary is fully utilized; through adoption of a compressive sensing reconstruction algorithm, high-dimensional sending signals are solved from low-dimensional received multiplexing signals; therefore, the signal multiplexing gain is greatly improved under a condition that the number of the transceiving antennas of the MIMO system is stated; the application demand of the MIMO system for broadband transmission is satisfied well; and the technique provided by the invention has the advantages that a receiving end reconstructs multi-way data streams at a high probability through a mature optimum reconstruction algorithm in the compressive sensing field and the modification of the existing MIMO system is little, wherein the multi-way data streams are sent by a sending end through a compressive multiplexing step.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a signal multiplexing matrix design and signal detection technology of a compressed sensing-based multiple-input multiple-receive MIMO system. 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, wherein 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 oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06
CPCH04B7/0456H04B7/0697
Inventor 刘婵梓陈庆春唐小虎
Owner SOUTHWEST JIAOTONG UNIV
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