Time division multi-random code generator for radar

Abstract

The invention relates to the technical field of radars, in particular to a time division multi-random code generator for a radar, which consists of a broadband noise generator, n groups of surface acoustic wave SAW bandpass filters, microwave broadband amplifiers, a voltage comparator, a sampling holder, and an active integrator; the PN junction of a noise diode is doped with an annular diffusionregion to inhibit the generation of uncontrollable noise; the code frequency of the broadband noise generator is cascaded and segmented from low to high and outputs P1, P2, and Pn groups of random two-phase codes through n groups of bandpass filter amplifiers, the voltage comparator and the sampling holder; and the random two-phase codes are fed back by the active integrator, and are coded in a time-division circuit to generate n paths of pulses to supply to a radar phase modulator and a multichannel pulse correlator. The random two-phase codes have higher resolution when a target to be detected is closer; linear increasing resolution accumulative detection signals improve details of a target to be identified; and time division multi-random code generators are not interfered with each other when working in the same regional environment, overcome the defect that continuous wave radar emission signals block the receiving of back waves, eliminate blind distance, and realize short-distancedetection. The time division multi-random code generator is suitable for collision-proof radars for automobiles and ships and other multi-target detection radars.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a radar time-division multivariate random code generator. Background technique [0002] The existing random signal continuous wave radar has a high anti-interference ability in the correlation processing of transmitting and receiving random signals. The current of the reverse bias tube chip is not uniform, and uncontrollable noise is generated, which affects the probability of random signal generation and reduces the radar detection performance. Moreover, the prior art random signal radar has a single detection target size and distance resolution, and the aperiodicity of the random signal, and the accumulation of detection signals to improve the detection factor need to be solved. The random signal continuous wave radar antenna transmits energy leakage to block the reception of the echo, while the pulse width of the pulse radar blocks the reception of the echo, resulting in blind ...

AI Technical Summary

Problems solved by technology

[0002] The existing random signal continuous wave radar has a high anti-interference ability in the correlation processing of transmitting and receiving random signals. The current of the reverse-biased tube chip is not uniform, and uncontrollable noise is generated, which affects the probability of random signal generation and reduces the radar detection performance.

Moreover, the existing random signal radar has a single detection target size and distance resolution, and the non-periodicity of the random signal, the accumulation of detection signals and the improvement of the detection factor need to be solved

The random signal continuous wave radar antenna transmits energy leakage to block the reception of the echo, while the pulse width of the pulse radar blocks the reception of the echo, resulting in blind distance and affecting the detection.

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