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Channel equalization method based on momentum fractional order multimode blind equalization algorithm

A multi-mode blind equalization and channel equalization technology, applied in baseband systems, digital transmission systems, baseband system components, etc., can solve problems such as difficulty in implementation, high computational complexity, inability to compensate and correct for channels and complex structures, etc. The effect of easy implementation and reduced implementation cost

Active Publication Date: 2022-02-25
XIDIAN UNIV
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Problems solved by technology

[0006]The purpose of the present invention is to provide a channel equalization method based on the momentum fractional multi-mode blind equalization, which can solve the existing In the channel equalization method, the channel cannot be compensated and corrected quickly, the structure is complex, and the computational complexity is high, which makes it difficult to realize

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  • Channel equalization method based on momentum fractional order multimode blind equalization algorithm
  • Channel equalization method based on momentum fractional order multimode blind equalization algorithm
  • Channel equalization method based on momentum fractional order multimode blind equalization algorithm

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] refer to figure 1 , to further describe the specific steps for realizing the present invention.

[0036] Step 1, obtain the signal to be equalized.

[0037] Refer to attached figure 2 , to further describe the step of obtaining the signal to be equalized in the present invention.

[0038] figure 2 The received signal is convoluted with the impulse response of the transmission channel, and then a Gaussian white noise is superimposed to obtain the signal to be equalized.

[0039] Calculate the send signal constant according to the following formula:

[0040]

[0041]

[0042] Among them, R r with R i Respectively represent the constants obtained according to the statistical information of the real part and imaginary part of the signal sent by the sender, s r and s i Respectively represent the real part and imaginary part of the signa...

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Abstract

The invention provides a channel equalization method based on a momentum fractional order multimode blind equalization algorithm, and the method comprises the steps of introducing the concept of fractional order gradient, momentum information and the like into a blind equalization technology, and constructing a cost function by utilizing the expectation of an output signal and an input signal of an equalizer, and iteratively updating the tap weighted vector of the equalizer by using fractional order gradient information and momentum information of the cost function, thereby increasing the convergence rate while ensuring low residual intersymbol interference and low bit error rate. Compared with a traditional multimode algorithm, the method has lower residual inter-symbol interference and bit error rate at the initial stage of equalization, can quickly compensate and correct a channel, and is simple in structure and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and further relates to a channel equalization method based on momentum fractional multi-mode blind equalization in the technical field of wireless communication. The invention can be used to compensate and correct the channel in the wireless channel under the influence of the compound additive Gaussian white noise. Background technique [0002] At present, multi-path transmission and limited bandwidth transmission in the wireless communication process will cause serious intersymbol interference at the receiving end, which greatly reduces the reliability of communication. The channel equalization technology can weaken or eliminate the influence of intersymbol interference on the communication quality of wireless communication. [0003] The traditional equalization method needs to use the training sequence to estimate the tap coefficients of the equalizer, and then use the existing ...

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Application Information

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IPC IPC(8): H04L25/03
CPCH04L25/03089Y02D30/70
Inventor 罗勇江李佳奇杨家利赵东傅佳鑫
Owner XIDIAN UNIV
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