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A Broadband Phase-Only Transmit Adaptive Beamforming Method

An adaptive beam and phase technology, applied in the direction of space transmit diversity, diversity/multi-antenna system, electrical components, etc., can solve the problems of complex solution method and process, inability to directly use broadband array signals, etc., to improve interference suppression performance , Conducive to the effect of engineering realization

Active Publication Date: 2022-02-01
HOHAI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The solution methods and processes of the above-mentioned various algorithms are very complicated, and most of them are only suitable for narrowband phase-only beamforming, and cannot be directly applied to wideband array signals
Although there are few reports on the broadband phase-only ADBF method, it still has high research value

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  • A Broadband Phase-Only Transmit Adaptive Beamforming Method
  • A Broadband Phase-Only Transmit Adaptive Beamforming Method
  • A Broadband Phase-Only Transmit Adaptive Beamforming Method

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0051] Such as figure 1 As shown, the present invention discloses a broadband phase-only transmission adaptive beamforming method, which combines subband linear multi-constrained minimum variance (Multiple Linearly Constrained Minimum Variance, MLCMV) criterion and repeated iterative uniform weight optimization (Reiterative Uniform Weight Optimization, RUWO) algorithm, including the following steps:

[0052] Step 1. Design a subband filter bank on the broadband transmit antenna array:

[0053] Let the broadband transmitting antenna array be a uniform linear array with the number of array elements M (M=32 can be set), and each array element is followed by a tap equivalent to a discrete finite impulse response (finite impulse response, FIR) filter Delay line (Tapped Delay Line, TDL), TDL coefficient is J (can be set to J = 15), such as figure 2 s...

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Abstract

The invention discloses a broadband phase-only transmission adaptive beamforming method. Firstly, a subband filter bank is designed; then, the subband division of the broadband signal is completed by using the analysis filter bank in the subband filter bank; and then, combining the subband The MLCMV criterion and RUWO algorithm calculate the phase-only adaptive beamforming weight vectors of each subband; finally, the processed wideband signal is reconstructed by using the integrated filter bank in the subband filter bank. The simulation experiment results show that the phase-only weighting algorithm researched by the present invention can also control the zero point direction of the broadband transmission signal antenna pattern to not change with frequency by only adjusting the phase, which is easier to implement in engineering. And by dividing narrower sub-bands, the interference zero depth can be improved, and the interference suppression performance can be enhanced.

Description

technical field [0001] The invention relates to the field of array signal processing, in particular to a broadband phase-only transmission adaptive beamforming method. Background technique [0002] The adaptive transmit beamforming algorithm of modern phased array radar often needs to apply complex weighting to each array element, that is, to weight the amplitude and phase at the same time. The amplitude weighting is controlled by the power amplifier. When the weighted amplitude is small, it will cause energy loss in the system, but the phase-only weighting method controlled by only the phase shifter can avoid this energy loss and reduce the complexity of the transmitting circuit. , and is easier to implement in engineering. Therefore, the phase-only beamforming algorithm is very attractive. [0003] Compared with the commonly used amplitude-phase weighted adaptive beamforming algorithm, the phase-only weighting process is equivalent to adding a constant modulus constraint...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
CPCH04B7/0617H04B7/0634
Inventor 沈明威王冠王晓冬姚旭万晓玉
Owner HOHAI UNIV