Automobile radar cross-interference inhibition method based on hyperchaos coding

Abstract

The invention relates to an automobile radar cross-interference inhibition method based on hyperchaos coding. Through two-dimensional pseudorandom coding modulation based on a hyperchaos technology and performed on transmitted waveforms at a transmitting terminal, through utilization of a pseudorandom coding orthogonality characteristic, and through a reasonable decoding mode at a receiving terminal, the waveform transmitted by an own radar obtains a coherent accumulation gain, an influence of cross interferences, which are brought by waveforms transmitted by other radars, on the own radar is habited due to processing loss caused by coding irrelevance, and then the problem of an insufficient MFSK waveform cross-interference-resistance capability is solved.

Description

technical field [0001] The invention belongs to the application field of automotive radar, and in particular relates to a method for suppressing cross-interference of automotive radar based on hyperchaotic coding. Background technique [0002] In the active and safe driving technology of automobiles, the millimeter-wave anti-collision radar has attracted much attention due to its advantages such as being less affected by weather conditions and high measurement accuracy, and has become an important part of the intelligent transport system (ITS, intelligent transport system) technology. [0003] However, since its proposal so far, compared with other types of sensors such as optical and ultrasonic, millimeter-wave radar has not been widely used in practice. In addition to factors such as high cost, some key technical issues such as: electromagnetic wave cross-interference between different radars are a major problem restricting the commercialization of automotive anti-collisio...

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Problems solved by technology

[0005] However, the typical MFSK waveform does not consider the anti-interference performance. In the actual complex road environment, if there are multiple automotive radars in the scene, the MFSK waveform is susceptible to cross-interference brought by other radars, which will have a bad impact on driving safety.

[0006] The present invention proposes an anti-cross-jamming method for automotive radar based on waveform design: by performing two-dimensional pseudo-random coding modulation based on hyperchaotic technology on the transmitting waveform at the transmitting end, utilizing the characteristics of the orthogonality of pseudo-random coding, at the receiving end through A reasonable decoding method makes the transmitted waveform of the local radar obtain coherent accumulation gain, while the cross-interference caused by the waveform transmitted by other radars causes processing loss due to the irrelevance of the coding, and suppresses its influence on the local radar. Solve the problem of insufficient anti-cross interference ability of MFSK waveform

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