Vehicle-mounted radar system based on true random number generator

Abstract

The invention belongs to the field of radar detection, and discloses a vehicle-mounted radar system based on a true random number generator. The system comprises the true random number generator, an emitter, a receiver, and a processor. The true random number generator comprises a distributed feedback laser, and laser emitted by the distributed feedback laser is reflected by a chirped grating to generate chaotic laser; the output terminal of a voltage source is connected with a terminal voltage of the distributed feedback laser after passing through an inductor, and then outputs a binary sequence after passing through a blocking capacitor and a power amplifier comparator in sequence; the emitter is used for carrying out relative phase modulation on signals generated by the signal generatoraccording to the binary sequence generated by the true random number generator and then emitting the signals; the receiver is used for receiving the reflection signals, comparing the reflection signals with the emission signals and sending the signals to the processor to calculate a distance between an environmental object and a radar system and the relative speed. Radar signal emission and demodulation are performed based on the high-speed true random number generator so that safety can be greatly enhanced.

Description

technical field [0001] The invention belongs to the field of radar detection, and in particular relates to a vehicle-mounted radar system based on a true random number generator. Background technique [0002] With the development of automobile technology, on-board radar is more and more widely used in automobile assisted driving or automatic driving. In this type of technology, vehicle-mounted radar is usually used to detect and identify the environment around the car. The radar transmits radar signals to targets (such as pedestrians or other vehicles on the road, etc.) and receives the echo reflected by the target. This obtains information such as the distance between the target object and the electromagnetic wave emission point (car), distance change rate (vehicle speed), azimuth, and altitude, so as to give the driver a prompt or directly perform corresponding driving operations based on this information. However, regular and orderly radar signals are easy to be copied, ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing vehicle-mounted radar system is vulnerable to attacks and thus cause safety accidents, the invention provides a vehicle-mounted radar system based on a true random number generator that is safe and can resist attacks from attackers

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