Radar beam forming device based on airspace compression projection and random clock sampling

Abstract

The invention relates to a radar beam forming device based on airspace compression projection and random clock sampling. The radar beam forming device mainly solves the problems that, in the prior art, cost is high, the sampling requirement is high and the data storage quantity is large. The radar beam forming device comprises an airspace compression projection module (1), a random clock sampling module (2) and a beam forming module (3). The airspace compression projection module (1) conducts airspace compression projection on a radar echo signal Z to obtain the airspace compression projection result D. The random clock sampling module (2) conducts rate reduction sampling on the airspace compression projection result D and transmits sample data of each channel and a selected clock passage to the beam forming module (3). The beam forming module (3) obtains sparse vectors sq of an angle domain through the matrix filling algorithm and the sparse reconstruction algorithm according to the sample data of each channel and the selected clock passage, and then the sparse vectors sq are accumulated through the beam forming module (3) to obtain a beam forming vector y. The radar beam forming device based on airspace compression projection and random clock sampling reduces cost, reduces the sampling requirement, shrinks the data storage space and can be used for radar beam forming.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and further relates to a radar beam former, which can be used for radar beam formation. Background technique [0002] With the high-precision and high-resolution requirements of modern radar signal processing, the sampling and storage of large-scale high-speed data has become an urgent problem to be solved in radar beamforming. Existing beamformers mainly include traditional radar beamformers, space-time two-dimensional compressed radar beamformers based on compressed sensing technology, and so on. in: [0003] The traditional radar beamformer is based on the controllable phase shifter to perform continuous phase compensation for each array element to achieve beamforming in a specific direction, thereby realizing the estimation of the direction of arrival. Its structure includes receiving array element, controllable phase shifter, AD sampling and digital beam forming module. Fo...

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Problems solved by technology

Its structure includes a space-domain compression module, a time-domain compression module and a space-time two-dimensional reconstruction module. The time-domain compression is realized by an analog information converter. The analog information converter needs to generate a high-speed pseudo-random sequence, and the change rate of the sequence must at least meet Nyquist rate, and to generate a high-speed pseudo-random sequence that satisfies the Nyquist rate, the system cost must be increased

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