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A wideband beamforming method without pre-delay

A beam and broadband technology, applied in the field of broadband beam forming without pre-delay, can solve the problems of poor algorithm stability, low performance, high computational complexity, and achieve good output performance, low computational cost, and low time domain taps.

Active Publication Date: 2022-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] Aiming at the deficiencies of the existing broadband beamforming technology without pre-delay, such as high computational complexity, low performance and poor algorithm stability, the present invention proposes a new broadband beamforming method without pre-delay

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  • A wideband beamforming method without pre-delay
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  • A wideband beamforming method without pre-delay

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Embodiment Construction

[0028] For a better description, the following definitions are first made:

[0029] Broadband beamforming: The broadband signal beam is transmitted to the antenna, and the beam undergoes a series of processing at the receiving end of the antenna to make the beam passing through the antenna point to the desired direction. This process is collectively called broadband beamforming.

[0030] Desired signal: The desired signal, that is, the signal that can pass through without distortion after beamforming.

[0031] Down-conversion: The process of restoring the RF signal to a baseband signal. The signal received by the antenna is generally a carrier-processed RF signal. If the original signal is to be processed, it needs to be de-carrier and restored to the baseband signal.

[0032] A / D sampling: The baseband analog signal is sampled at a certain time interval to obtain a digital signal with discrete time and amplitude. This process of converting an analog signal into a digital sign...

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Abstract

The invention discloses a broadband beam forming method without pre-delay, and belongs to the technical field of radar communication. It includes the following steps: step 1, building a signal model; step 2, down-converting the signal; step 3, A / D sampling; step 4, reorganizing data through the Frost space-time processor; step 5, calculating the autocorrelation of the signal matrix; step 6, constructing a constraint matrix C and a constraint vector f according to the distortion-free condition; step 7, establishing an optimization problem, and solving an optimal weight vector. The invention adopts the method of directly constraining in the frequency domain, and can suppress the interference and noise signals to the greatest extent without losing the expected signal. This method has lower requirements on the number of taps in the time domain, and obtains good output performance with a small calculation cost; when the array scale is large or there are many target signals, it has obvious advantages in calculation efficiency.

Description

technical field [0001] The invention belongs to the technical field of radar communication, and in particular relates to a broadband beam forming method without pre-delay. Background technique [0002] As an important array signal processing technology, broadband beamforming is widely used in many fields such as radar, sonar, communication and seismology. It can enhance the incident signal in the desired direction while suppressing interference and noise from other directions. With the increasing bandwidth of processing signals, wideband beamforming has gradually attracted people's attention. [0003] In practical applications, broadband beamforming often needs to adjust the weight coefficients of the beamformer according to the data received by the array, in order to obtain the best performance of the beamformer in the current environment. If the environment is constantly changing, the weight coefficients also need to be continuously adjusted adaptively. The most basic st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/08H04B17/391
CPCH04B7/0617H04B7/0854H04B7/0897H04B17/391
Inventor 谢菊兰饶申宇冯雅栋郭明宇邓宇昊何子述
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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