Millimeter-wave random biphase code phase-modulation and amplitude-modulation automotive collision-proof radar

Abstract

The invention relates to the technical field of radio positioning, in particular to a millimeter-wave random biphase code phase-modulation and amplitude-modulation automotive collision-proof radar. Aquasi-optical integrated dielectric lens antenna and an array are arranged; a DSP scans wave beams lane by lane to guard against a target possible collided on a road surface; a broadband noise sourcegenerates two random code generators, a random code generator A modulates phase and measures distance / speed, and a random code generator B modulates amplitude, and performs transmitting / receiving conversion and back edge detection; double random code radio frequency is transmitted through an upconverter, an R / T3, a frequency multiplier and power amplifier, an R / T2, an isolator and an antenna; andback waves are transmitted to the DSP and an MCU for processing control through the antenna array, a beam switch, an isolator, an R / T1, a high frequency amplifier, a downconverter, an intermediate frequency amplifier, a random sequence asynchronous gate, a digital intermediate frequency quadrature detector I / Q and a digital pulse compression correlator. The radar ensures traffic flows in adjacentlanes run densely without mutual interference and operate in a coexisting way, has high electromagnetic compatibility EMC, inhibits false-alarm and determines the position, distance and relative speedof a target through the DSP, displays three-dimensional images and identifies a target closest to the automobile through a CRT, performs the audible and visual alarm if the distance of the target issmaller than a safety distance, intelligently avoids a barrier or reduces speed or brakes if the distance of the target is approximate to a danger distance, and controls and references a road condition to combine the speed of the automobile and the current position information on a GPS to make a choice, thereby obviously improving the running safety of the automobile.

Description

technical field [0001] The invention relates to the technical field of radio wave transmitting and receiving to detect the azimuth, distance and speed of a target, in particular to a millimeter wave random two-phase code phase modulation and amplitude modulation automotive anti-collision radar. Background technique [0002] At present, the number of automobiles and other motor vehicles is increasing, the roads are congested and overloaded, and traffic accidents occur frequently, causing a large number of casualties and heavy property losses, which have become serious social problems in the world. The United States, Europe, Japan and other countries have invested a lot of manpower and material resources to develop advanced anti-collision radars, which have been incorporated into national development plans. Because the working environment and conditions of automobile anti-collision radar are very harsh, the collision avoidance time of fast-moving vehicles is extremely short, l...

AI Technical Summary

Problems solved by technology

In addition, continuous wave automobile anti-collision radar antenna transmits energy leakage blockage, which affects the reception of weak target echo signals, pulse system radar transmits pulse width to block received echoes, and problems such as blind distance need to be solved

Generally speaking, the existing anti-collision radar lacks the function of using sensor signals to form a closed-loop control, lacks adaptive control of the road environment antenna, intelligent control of vehicle automatic obstacle avoidance, deceleration, and braking, and cannot help the driver in time if the visibility is poor or the situation is in distress. avoid accidents

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