Millimeter wave random bi-phase code phase modulation amplitude modulation vehicle collision avoidance radar

Abstract

The invention relates to the technical field of radio positioning, in particular to a millimeter-wave random bi-phase code phase modulation amplitude modulation automobile anti-collision radar. Set the optical integrated dielectric lens antenna and array, DSP scans the beam according to the lane to warn the target that may collide on the road surface, and a broadband noise source generates two random code generators. Random code generator B-symbol amplitude modulation, receiving / transmitting conversion and control trailing edge detection, double random code radio frequency through up-conversion, R / T3, frequency multiplication and power amplifier, R / T2, isolator, antenna transmission; echo through the antenna Array, beam switch, isolator, R / T1, high amplifier, down-conversion, intermediate amplifier, random sequence asynchronous gate, digital intermediate frequency quadrature detector I / Q, digital pulse pressure correlator input DSP and MCU processing control , the radar adjacent lane traffic dense driving coexistence operation without interference, has a high environmental electromagnetic compatibility EMC, DSP suppresses false alarms to determine the target azimuth, distance and relative speed, CRT displays three-dimensional images, and identifies the closest distance to the vehicle The goal is less than the safe distance, sound and light alarm, approaching the dangerous distance, intelligent obstacle avoidance or deceleration, braking, its control refers to the road conditions combined with the current vehicle speed and GPS current position information to make a decision, which significantly improves the driving safety of the car.

Description

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

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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