Automotive anti-collision radar signal processing device by use of 77GHz millimeter waves

Abstract

The invention relates to an automotive anti-collision radar signal processing device, particularly relates to an automotive anti-collision radar signal processing device by use of 77GHz millimeter waves, and belongs to the technical field of communication and radar. The device comprises a radio frequency module, a power supply module, an FPGA (Field Programmable Gate Array) module, four groups ofreceiving circuits, two groups of transmission circuits, a clock and an RS232 interface module, wherein each group of receiving circuit consists of a front receiving amplification circuit, a receiving filter module, a rear receiving amplification circuit and an A / D (analog to digital) conversion module; and each group of transmission circuit consists of a D / A (digital to analog) conversion module, a transmission attenuation circuit and a transmission filter circuit. The device has the advantages of concise circuit, small occupied vehicular space, low cost and low power consumption; a signal processing board can be used for effectively amplifying and filtering a signal received by a radar antenna; and a high-performance low-noise filter chip is adopted in secondary amplification, so that high-frequency noise is effectively reduced, the accuracy of sampled data is guaranteed, and the dynamic range of signals is effectively improved.

Description

technical field [0001] The invention relates to an automobile anti-collision radar signal processing device, in particular to a 77GHz millimeter-wave automobile anti-collision radar signal processing device, which belongs to the technical field of communication and radar. Background technique [0002] The purpose of the active protection system of the vehicle safety system is to prevent accidents. The vehicle's active anti-collision system is one of the important components of the vehicle safety system, and it is also one of the configurations that more than 50% of consumers value more when buying a car. NHTSA's research results show that the anti-collision warning system can reduce rear-end collision accidents by an average of 51%, and traffic accidents caused by changing lanes by an average of 47%. Therefore, active safety driving auxiliary devices such as the active anti-collision control system of automobiles can significantly reduce the driver's burden and judgment erro...

AI Technical Summary

Problems solved by technology

[0004] The 24GHz millimeter wave radar sensor is mainly used for rear view and side view, while the 77GHz millimeter wave radar is used for front view. °, the error of speed measurement is less than 0.5m / s, the working distance is 1~150m, the distance resolution is within 1m, and the false alarm rate is less than 10 -4 , the above-mentioned patents do not address 77GHz millimeter-wave radar, nor do they mention specific signal processing links in detail

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