A radar time-division multivariate random code generator
A random code and generator technology, applied in the field of radar, can solve the problems affecting the probability of random signal generation, uneven chip current, detection target size, single distance distance resolution, etc.
Inactive Publication Date: 2011-12-07
阮树成
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[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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[0012] refer to figure 1 , 2 , shown in 3, the specific implementation method and embodiment of the present invention, time division circuit is made of counter 1, monostable flip-flop 2, decoder 3, encoding switch 4, timing asynchronous gate 5, counter 1 clock end, single The input terminal of the steady-state trigger 2 is connected to the clock signal, and the multivariate random code generator is composed of a broadband noise generator 9, a SAW bandpass filter 6, a microwave broadband amplifier 7 and n groups of random code generators 8, and the broadband noise generator Device 9 is a ring-shaped diffused P region doped by a noise diode in its N region of the PN junction of the tube core, and the substrate N in the N region of the tube chip substrate + A heat sink is set, or the P region of the die is doped into an annular diffused N region, and the substrate P of the P region of the die substrate + Set up a heat sink, place a noise diode in series with a temperature-compe...
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The invention relates to the technical field of radar, in particular to a radar time-division multivariate random code generator. It consists of a broadband noise generator, n sets of SAW bandpass filters, microwave broadband amplifiers, voltage comparators, sample holders, and active integrators. The PN junction of the noise diode is doped into an annular diffusion area to suppress flicker. To control the generation of noise, the code frequency of the broadband noise generator is from low to high-level concatenated segments, through n groups of band-pass filter amplifiers, voltage comparators, and sample-and-hold devices to output P1, P2, and Pn groups of random bi-phase codes, and through active integration The device feedback, in the time-division circuit encoding generates n-channel pulses to provide to the radar phase modulator and multi-channel pulse pressure correlator, the closer the detection target distance is, the higher the resolution is, and the linear incremental resolution accumulates the detection signal to improve the recognition target details, the same area environment The work does not interfere with each other, and overcomes the blockage of echo reception by the continuous wave radar transmission signal and eliminates the blind distance to realize short-distance detection. Suitable for automotive, ship collision avoidance radars 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 echoes, while the pulse width of pulse radar blocks the reception of echoes, resulting in blind distance...
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IPC IPC(8): G01S7/28G01S13/00
Inventor 阮树成
Owner 阮树成