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A signal processing method and device

A signal processing device and signal processing technology, applied in the field of signal processing, can solve the problem that time-domain signals cannot meet high-precision requirements, etc., and achieve the effects of fast Fourier transform processing speed, improved accuracy, and fast calculation speed

Active Publication Date: 2020-07-14
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] What the present invention aims to solve is the problem that the fast Fourier transform method cannot meet the high-precision requirements for processing time-domain signals

Method used

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  • A signal processing method and device
  • A signal processing method and device
  • A signal processing method and device

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Experimental program
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Embodiment 1

[0068] This embodiment provides a signal processing method, figure 2 It is a schematic flow chart of the signal processing method, and the signal processing method includes:

[0069] Step S0, obtaining a signal to be processed. For different applications, the specific method for obtaining the signal to be processed is also different. Taking the spherical near-field measurement as an example, the acquisition of the signal to be processed includes: arranging a number of probe antennas at certain angular intervals according to the requirements of the sampling theorem on an arc-shaped track surrounding the antenna to be tested; The tangential electric field signal on the spherical surface of the antenna to be tested; obtain the electric field signal of the antenna to be tested according to the tangential electric field signal; carry out near-far field transformation to the electric field signal of the antenna to be tested to obtain the spherical wave expansion coefficient signal...

Embodiment 2

[0095] This embodiment provides another signal processing method, Figure 10 It is a schematic flow chart of the signal processing method, and the signal processing method includes:

[0096] Step S1, evenly divide the integration interval of the signal to be processed into N d subintervals, where N d is a positive integer not less than 2;

[0097] Step S2, performing Gaussian integral sampling on the signal to be processed in each subinterval, so as to obtain N in each subinterval g sampling points, where N g is a positive integer not less than 1;

[0098] Step S3, perform fast Fourier transform on the sampling points located at the same position in each subinterval to obtain N g a first vector;

[0099] Step S4, for the N g The first vectors are phase-shifted to obtain N g a second vector;

[0100] Step S5, for the N g Gaussian integration is performed on the second vector to obtain the integral result;

[0101] Step S6, multiplying the integration result by an int...

Embodiment 3

[0104] This embodiment provides a signal processing device, and the signal processing device includes a signal obtaining module, an interval division module, a sampling module, a transformation module, a phase shifting module, an integrator, a multiplier, and a characteristic obtaining module.

[0105] The signal obtaining module is used to obtain the signal to be processed; the interval division module is used to evenly divide the integration interval of the signal to be processed into N d subintervals, where N d is a positive integer not less than 2; the sampling module is used to perform Gaussian integral sampling on the signal to be processed in each subinterval, so as to obtain N in each subinterval g sampling points, where N g is a positive integer not less than 1; the transform module is used to perform fast Fourier transform on the sampling points located at the same position in each subinterval to obtain N g a first vector; the phase shifting module is used for the ...

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Abstract

The invention discloses a signal processing method and device. The method comprises the following steps: obtaining a to-be-processed signal; uniformly dividing an integral interval of the to-be-processed signal into Nd subintervals, wherein Nd is a positive integer not less than 2; carrying out Gauss integral sampling on the to-be-processed signal in each subinterval, so as to obtain Ng sampling points in each subinterval, wherein Ng is a positive integer not less than 1; carrying out fast Fourier transformation on sampling points at the same position of all the subintervals, so as to obtain Ng first vectors; carrying out phase shift processing on the Ng first vectors, so as to obtain Ng second vectors; carrying out Gauss integration on the Ng second vectors, so as to obtain an integrationresult; multiplying the integration result by an integration constant, so as to obtain Fourier integration of the to-be-processed signal; and obtaining frequency domain characteristics of the to-be-processed signal according to the Fourier integration of the to-be-processed signal. The signal processing method and device which are provided by the invention can rapidly obtain a high-precision Fourier integration result.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a signal processing method and device. Background technique [0002] Discrete Fourier Transform (DFT, Discrete Fourier Transform), as a bridge between signal time domain and frequency domain conversion, is one of the cornerstones of modern digital signal processing theory. It is widely used in real-time spectrum analysis and spectrum in cognitive radio. Perception, OFDM signal processing in broadband wireless communication, etc., in many signal processing fields. In order to improve the computational efficiency of the discrete Fourier transform, the Fast Fourier Transform (FFT, Fast Fourier Transform) algorithm or the Goertzel algorithm is usually used to implement the discrete Fourier transform in practical engineering applications. [0003] The theoretical basis of the fast Fourier transform is to divide the integral area of ​​the time domain signal evenly, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/14
CPCG06F17/141
Inventor 袁浩波周虹光谢梦雅吴征国侯建强
Owner XIDIAN UNIV
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