Multichannel random harmonic modulation sampling radar receiver and method thereof

Abstract

The invention discloses a multichannel random harmonic modulation sampling radar receiver and a method thereof. The multichannel random harmonic modulation sampling radar receiver comprises a frequency mixer, M analog multipliers, M integrators, M low-speed AD convertors and a target information reconstruction processing module, wherein the frequency mixer is connected with the M analog multipliers; each analog multiplier is connected with one integrator; each integrator is connected with one AD convertor; data collected by the AD convertors are input into the target information reconstruction processing module; and the target information reconstruction processing module achieves the purpose of radar target information estimation through three steps, namely, measurement matrix construction, radar sparse representation matrix construction and reconstruction of radar information. The difficult problem of ultra wide band radar system digital sampling is solved; and a signal reconstruction effect is guaranteed, and the realizing difficulty and the cost of signal hardware modulation are effectively reduced at the same time.

Description

Technical field [0001] The invention belongs to the technical field of radars, and relates to a multi-channel random harmonic modulation sampling radar receiver and a method thereof. The invention can omit the matched filter processing of the traditional radar receiver, simplify the signal processing flow, and solve the problems of the existing broadband and ultra-wideband radar signal sampling rate being too high and the signal processing data volume being too large. Background technique [0002] Compared with traditional narrowband radars, wideband radar has the advantages of high range resolution, target recognition and imaging capabilities, and extremely strong four-resistance capabilities. For wideband radar systems, whether in the military or civilian fields, the range resolution has always been improved. It is an important direction in radar technology research. However, for wideband signals, the signal sampling method guided by the Nyquist sampling theorem has brought gr...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, and proposes a multi-channel random harmonic modulation sampling radar receiver. The present invention saves the matching filter processing of the traditional radar receiver, simplifies the signal processing flow, and solves the problem of existing The problem of high sampling rate of broadband and ultra-wideband radar signals and excessive data volume of signal processing

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