A frequency-domain broadband beamforming multi-filter combination processing method and system
A processing method and filter technology, applied in diversity/multi-antenna systems, transmission systems, radio transmission systems, etc., to achieve the effect of reducing the amount of computation, simplifying the system, and avoiding excessive computation.
Active Publication Date: 2022-06-14
HOHAI UNIV
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[0003]Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a frequency-domain broadband beamforming multi-filter combination processing method and system to solve the problems in the prior art The problem of increased calculation
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[0173] Table 1 radar and target parameter settings
[0174]
[0175]
[0176] (1) Compared with conventional beam formation methods
[0177] Figure 6 The beam of the beam of the -20 ° incident signal under the conventional method is displayed. Figure 7 The multi-filter merging processing of the -20 ° beams is displayed, and the beam direction of -20 ° is implemented to verify the feasibility of the system scheme.
[0178] (2) Channel balance verification
[0179] Figure 8 It represents the amplitude response before the 16 channels are not balanced, and the point line is the reference channel. Figure 9 It indicates the amplitude response of 16 channels after equilibrium.The final frequency response of the balanced channel is the same as the reference channel, and the results show that the balanced channel will eventually achieve a balance of the reference channel.
[0180] Figure 10 The tracting of the array of the beams of the beam is formed at the specified angle, and the ...
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The invention discloses a frequency-domain broadband beamforming multi-filter combination processing method and system, comprising the following steps: acquiring an array receiving signal; performing discretization processing on the received signal; performing integer delay processing on the discretized processed signal, Obtain the integer delay signal; mix the integer delay signal with the local oscillator signal to obtain the mixed frequency signal; perform FFT processing on the mixed frequency signal to obtain the frequency domain response signal of the mixed frequency signal; combine the frequency domain response signal with the multiple Multiply the synthesized responses of the filters to obtain a single-channel output frequency domain response signal; perform IFFT on the single-channel output frequency-domain response signal to obtain a single-channel output signal; combine all single-channel output signals to obtain a multi-channel composite signal; Different signal input angles perform broadband beamforming on the multi-channel composite signal. The invention realizes the simplification of the system, and at the same time reduces the calculation amount in the signal processing flow.
Description
Technical field [0001] The present invention is a field of broadband beam formation, which involves a multi -filter merger processing method and system for broadband beams to form a frequency domain broadband beam. Background technique [0002] Common beam formation technologies are mainly two methods: domain and frequency domain.The formation of the time domain broadband beam is mainly through the delay compensation of the signal through the FIR filter, and the delay of the signal is indirectly received by the element to achieve the broadband beam output.The main advantage of the time domain method is that the FIR filter structure and design method are mature, and the output signal of the expected frequency domain response is easy, and the time domain waveform continuously provides convenience for subsequent processing.Common problems with time domain beam formation methods include beam distortion caused by the insufficient order of the filter, and the filter coefficient design ...
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IPC IPC(8): H04B7/06H04B7/08
CPCH04B7/0617H04B7/0845
Inventor 王峰施昌杨陈哲
Owner HOHAI UNIV