Power microwave communication system wavelet noise reduction method

A technology of microwave communication and wavelet noise reduction, applied in transmission systems, baseband system components, electrical components, etc., can solve the problems of power microwave communication performance impact, no electromagnetic background noise, and many signal harmonic components, etc. The effect of large electromagnetic background noise, reducing phase distortion and bit error rate, and improving signal-to-noise ratio and signal correlation

Inactive Publication Date: 2016-01-13
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

However, the phase distortion and bit error rate of wireless communication signals have a great impact on the performance of power microwave communication. In the prior art, there is no solution specifically for the problems of large electromagnetic background noise and many signal harmonic components in power communication.

Method used

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  • Power microwave communication system wavelet noise reduction method
  • Power microwave communication system wavelet noise reduction method
  • Power microwave communication system wavelet noise reduction method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing and embodiment: figure 1 is a schematic flow chart of the present invention; figure 2 is a performance simulation diagram of the embodiment of the present invention.

[0033] Such as figure 1 As described, the wavelet noise reduction method of the power microwave communication system in this embodiment includes

[0034] a. converting the received signal into an intermediate frequency signal through frequency conversion processing, and converting the intermediate frequency signal into a digital signal;

[0035] b. According to different communication signals, select the wavelet basis function and determine the wavelet decomposition level;

[0036] c. Filter the signal to obtain wavelet coefficients;

[0037] d. Perform threshold quantization processing on the wavelet coefficients according to the preset wavelet decomposition level, and obtain the quantized wavelet coeffici...

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Abstract

The invention provides a power microwave communication system wavelet noise reduction method. The method comprises the steps that b, according to different communication signals, a wavelet primary function is selected and wavelet decomposition level is determined; c, the signals are filtered to acquire a wavelet coefficient; d, according to the preset wavelet decomposition level, threshold quantization processing is carried out on the wavelet coefficient to acquire a quantized wavelet coefficient; and e, a reconstructed signal is acquired through wavelet reconstruction filtering. According to the invention, the original signals are decomposed into a series of approximate components and detail components through wavelet decomposition; detail component processing and wavelet reconstruction are carried out to extract useful communication signals; weak signal characteristics are extracted in a strong noise background; noise in the signals can be effectively reduced and even eliminated; wireless communication demodulation signal to noise ratio and signal relevance can be significantly improved; phase distortion and bit error rate are reduced; the power microwave communication performance is improved; and the problems of large electromagnetic background noise and many signal harmonic components of power communication are solved.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a wavelet noise reduction method for a power microwave communication system. Background technique [0002] The power communication network came into being to ensure the safe and stable operation of the power system. It is the basis for power grid dispatching automation, network operation marketization and management modernization; it is an important means to ensure the safe, stable and economical operation of the power grid. At present, there are three main transmission methods in the power communication network: power line carrier communication, digital microwave communication, and SDH optical fiber communication. As a traditional communication method in power systems, power line communication is widely used in power communication networks. However, with the continuous development of bearer services and power communication networks, power line communication can no longer meet the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/10H04L25/03
Inventor 戴诚张津铭梁诗晨肖静薇梁柯张杰罗桑周新宇
Owner STATE GRID CORP OF CHINA
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