Digital signal adaptive code rate estimation method and device based on multi-wavelet basis combination

An adaptive code rate and frequency estimation technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems of limited estimated signal types, single application range of wavelet base, and low estimation accuracy, achieving strong reusability, The effect of high degree of automation and high module reuse rate

Active Publication Date: 2020-01-14
INST OF SOFTWARE - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low estimation accuracy and limited types of estimated signals due to the single application range of different wavelet bases when wavelet transform is used to estimate the code rate of digital signals. Signal Adaptive Code Rate Estimation Method and Device

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  • Digital signal adaptive code rate estimation method and device based on multi-wavelet basis combination
  • Digital signal adaptive code rate estimation method and device based on multi-wavelet basis combination
  • Digital signal adaptive code rate estimation method and device based on multi-wavelet basis combination

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specific Embodiment approach

[0033] The content of the invention described above describes a digital signal adaptive code rate estimation method based on multi-wavelet base combination from the level of core ideas and algorithms. However, in the actual development process, in addition to implementing the content of the present invention, some additional preparations are required. image 3 This is a specific implementation of the present invention, which will be described in detail below in steps.

[0034] (1) Build a software and hardware development environment

[0035] The invention relates to the field of radio monitoring, and the required development environment includes a universal software radio platform (USRP) and a PC. As the radio frequency end of the adaptive code rate estimation system, the USRP equipment itself is a shelf product, no software is required, only the driver needs to be installed in the PC; the PC, as the main body of the adaptive code rate estimation system, mainly completes the sampl...

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Abstract

The invention relates to a digital signal adaptive code rate estimation method and device based on multi-wavelet basis combination. The method comprises two steps of preprocessing and adaptive code rate estimation. In the preprocessing step, original I/Q data of an observation window is used as input, and a bandwidth rough estimation result and baseband I/Q data in a specified oversampling range are output through fast Fourier transform, frequency estimation, bandwidth rough estimation, down-conversion and down-sampling processing; in the adaptive code rate estimation step, the wavelet transform scale is adaptively selected according to a bandwidth rough estimation result, wavelet transform is carried out on the baseband I/Q data, jump information after transform is extracted, and finally,the code rate of a digital signal and a wavelet basis for signal acquisition are output through adaptive decision. According to the method, the problems of single wavelet basis application range andlow estimation precision of the traditional wavelet transform-based digital signal code rate estimation are solved, the accuracy of the digital communication system code rate estimation under the non-cooperative condition is improved, and the method can be applied to the fields of spectrum monitoring, electromagnetic reconnaissance and the like.

Description

Technical field [0001] The present invention belongs to the field of radio monitoring technology, and relates to a method and device for estimating a digital signal adaptive code rate based on a combination of multiple wavelet bases, which improves the traditional wavelet transform-based digital signal code rate estimation that has a single application range and The problem of low estimation accuracy improves the accuracy and intelligence level of digital communication system code rate estimation in non-cooperative situations. Background technique [0002] In actual communication system applications, there are a large number of situations in which the sender's information of non-cooperative communication is basically unknown to the receiver, such as spectrum monitoring and management in civil communications, communication system failure detection; military surveillance, communications in military communications Electronic warfare of electronic countermeasures; and new software ra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/309H04B17/391
CPCH04B17/309H04B17/3912
Inventor 肖祎晨周鑫任海玉胡明明邱源
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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