Channel Distortion Elimination Method Based on Maximum Correlation Entropy and Fractional Norm Blind Equalization

A maximum correlation entropy, fractional-order technology, applied in baseband systems, digital transmission systems, baseband system components, etc., can solve problems such as slow convergence speed, achieve fast convergence speed, and ensure convergence accuracy.

Active Publication Date: 2022-05-17
西安晟昕科技股份有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and propose a channel distortion elimination method based on maximum correlation entropy and fractional norm blind equalization, which is used to solve the technical problem of slow convergence speed in the prior art

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  • Channel Distortion Elimination Method Based on Maximum Correlation Entropy and Fractional Norm Blind Equalization
  • Channel Distortion Elimination Method Based on Maximum Correlation Entropy and Fractional Norm Blind Equalization
  • Channel Distortion Elimination Method Based on Maximum Correlation Entropy and Fractional Norm Blind Equalization

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[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] refer to figure 1 , the present invention comprises the following steps:

[0043] Step 1) Build an equalization system that realizes channel distortion elimination:

[0044] Step 1a) Sending end, channel and equalization system to eliminate channel distortion pass as attached figure 2 Connection in the manner shown, wherein s(n) is the source signal of the sending end, h represents the channel parameter, and the present embodiment sets the channel parameter as h=[0.1,0.3,1,-0.1,0.5,0.2], n(n) Represents the additive Alpha stable distribution noise, x(n) is the signal after the source signal s(n) passes through the channel, which can be expressed as:

[0045]

[0046] Step 1b) Construct an equalization system for channel distortion elimination, including cascaded equalizers and decision devices in sequence. The equalizer ...

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Abstract

The present invention proposes a channel distortion elimination method based on maximum correlation entropy and fractional normal mode blind equalization, which increases convergence speed while ensuring low residual intersymbol interference and low bit error rate. The implementation steps are: 1) Construct an equalization system that realizes channel distortion elimination; 2) Initialize parameters; 3) The equalizer calculates the error signal e(n) between R and the filtered signal y(n); 4) Constructs a system based on the maximum correlation entropy criterion A cost function; 5) The fractional normal mode blind equalization calculation module updates the tap weight vector of the transversal filter; 6) The equalizer judges whether to complete the elimination of channel distortion. The present invention uses the maximum correlation entropy as the cost function to ensure that the channel distortion elimination method has the advantages of strong stability and low residual intersymbol crosstalk in the Alpha stable distribution noise. While increasing the bit error rate, it improves the convergence speed and has better convergence performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a channel distortion elimination method, in particular to a channel distortion elimination method based on maximum correlation entropy and fractional norm blind equalization under Alpha stable distribution noise, which can be used for Alpha stable distribution noise Under the wireless channel compensation and correction. Background technique [0002] In recent years, wireless communication systems have been widely used in satellite communication, mobile communication, wireless local area network and other technical fields. The wireless communication system connects the sending end and the receiving end through a wireless channel, and electromagnetic waves propagate in the wireless channel through scattering, refraction and diffraction in different paths, which distorts the wireless channel, leads to an increase in the bit error rate, and greatly affects the quality o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03
CPCH04L25/03006Y02D30/70
Inventor 罗勇江包文泽杨家利李研李佳奇
Owner 西安晟昕科技股份有限公司
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