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TWACS communication signal feature extraction method based on time-frequency analysis

A time-frequency analysis and communication signal technology, applied in the direction of duplex signal operation, baseband system, baseband system components, etc., can solve the problems of poor anti-jamming performance, unadjustable time-frequency resolution, etc., to improve efficiency and simplify description and analysis process, the effect of enhancing anti-interference ability

Inactive Publication Date: 2019-01-22
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +1
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  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a method for extracting TWACS communication signal features based on time-frequency analysis to solve the problem of poor anti-interference performance and non-adjustable time-frequency resolution in the prior art

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  • TWACS communication signal feature extraction method based on time-frequency analysis
  • TWACS communication signal feature extraction method based on time-frequency analysis
  • TWACS communication signal feature extraction method based on time-frequency analysis

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Embodiment Construction

[0044] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the...

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Abstract

The embodiment of the invention discloses a method for extracting characteristics of TWACS communication signals based on time-frequency analysis, which comprises the following steps: establishing transmission model of power frequency communication, analyzing transmission characteristics of modulated signals; by analyzing the short-time Fourier transform, Wegener distribution, the Wegener distribution method for suppressing cross interference is proposed. The Wegener distribution method with cross-interference suppression has good time-frequency focusing and interference suppression characteristics, and has good computational efficiency. It can overcome the influence of zero-crossing time difference of the transceiver voltage, and greatly enhance the anti-interference ability of the powerfrequency communication system, and has very good application value.

Description

technical field [0001] The invention relates to the technical field of power frequency communication, in particular to a method for extracting characteristics of TWACS communication signals based on time-frequency analysis. Background technique [0002] TWACS (Two Way Automatic Communication System, two-way power frequency communication technology) is a two-way digital communication technology suitable for power distribution networks. It uses the voltage and current distortion signals at the zero-crossing point of the system voltage to realize information transmission. It has the advantages of simple implementation and low cost. Low cost, good anti-interference performance, and long-distance communication through transformers, etc., are more suitable for complex power grid environments. [0003] Accurately detecting the time-domain characteristics of the modulated signal is the key to TWACS technology, but the existing detection methods for the time-domain characteristics of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/14H04B17/391H04L25/03
CPCH04L5/14H04L25/03012H04L25/03159H04B17/391
Inventor 毕晓伟张勇刘晗张鹍金志强毕晓涛王辉王鹏苏静华王玉家王艳梅聂其兵周洁刘磊刘小芸赵晓红郑大伟苑超徐霞夏立磊王一蒙张立杨李迅吴奎华梁荣冯亮杨波杨慎全刘淑莉李昭李凯刘钊庞怡君
Owner RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER
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