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A spatio-temporal joint array processing method and device

An array processing and array technology, which is applied in the field of parameter measurement and space-time combined array processing methods and devices, can solve the problems that the performance of subsequent spatial domain processing is degraded in arrival estimation and the error signal amplitudes obtained by time domain processing are equal, so as to avoid the degradation of processing performance. Effect

Active Publication Date: 2020-05-15
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a space-time array processing method for the problem that the signal amplitude and phase obtained by time-domain processing with errors will lead to a decrease in the performance of direction-of-arrival estimation in subsequent space-domain processing. Combined array processing method and device

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  • A spatio-temporal joint array processing method and device
  • A spatio-temporal joint array processing method and device
  • A spatio-temporal joint array processing method and device

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specific Embodiment 1

[0105] Specific embodiment one: in order to verify the effectiveness of the present invention, the parameter estimation example based on array processing is designed, and condition is as follows:

[0106] ■The example adopts a one-dimensional uniform linear array with 16 array elements and an array element spacing of 0.04m;

[0107] ■The array receives two signals arriving at the same time, the frequency of signal 1 is 3958MHz, the incident angle is -8°, the frequency of signal 2 is 4050MHz, and the incident angle is 0°;

[0108] ■The present invention adopts figure 2 The processing method is to estimate the parameters of the amplitude, phase and direction of arrival of the radiation source through the joint optimization of time and space. As a comparison, the traditional method uses the short-time Fourier transform of the incident time-domain signal to extract the amplitude and phase of the signal, and then uses the Capon digital beam scanning method to estimate the directi...

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Abstract

The invention relates to the parameter measurement technology in the array signal processing field. In order to solve technical problems existing in the prior art, the invention provides a joint space-time array processing method and a joint space-time array processing device. space-time domain joint optimization processing is used, approximate maximum likelihood fitting is carried out on parameter features of the time dimension and the space dimension of array receiving signals at the same time, and thus, the amplitude, the phase and the direction of arrival of incident signals can be estimated in a high precision mode. According to a space-time domain joint FIR filter coefficient h, the original complex magnitude of signals is acquired for the incident signals with the incident direction to be theta<k> and the frequency to be omega<k>; a two-dimensional power spectrum corresponding to the incident signals is further obtained; and all incident directions theta<k> and frequencies omega<k> are searched, a two-dimensional power spectrum of a target relative to the incident direction and the frequency is acquired, and estimation on the complex magnitude, the frequency and the direction of arrival of the incident signals are carried out.

Description

technical field [0001] The invention relates to a parameter measurement technology in the field of array signal processing, in particular to a space-time combined array processing method and device. Background technique [0002] The array received signal actually contains two dimensions of information. From the perspective of time, the signal amplitude and phase received by each array element channel at different times reflect the time domain characteristics of the signal. From the perspective of space, the signal amplitude and phase relationship of different array element channels at the same time reflect the spatial characteristics of the incident signal. [0003] The existing array processing method uses the signal received independently by each channel to obtain the amplitude and phase information of the channel, and then uses the amplitude and phase relationship between channels to complete the array spatial domain processing. This is a method of dealing with time fir...

Claims

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Application Information

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IPC IPC(8): G01S3/00G01S3/02
CPCG01S3/00G01S3/02
Inventor 蒋景飞臧维明武震李昀豪
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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