77GHz毫米波汽车防撞雷达抗干扰射频编码方法

RF Encoding for 77GHz Millimeter-Wave Automotive Collision Radar Anti-Interference

随着77GHz车载毫米波雷达的大范围使用,随之而来的是雷达相互间的干扰问题。雷达射频编码是重要的抗干扰手段,根据车载毫米波雷达的工作特点,提出了一种射频编码方式来解决雷达相互干扰问题。该编码方式基于毫米波射频芯片的二相调制功能,在发射时对每个周期的相位进行二相编码,在接收时按照已知的规则对信号解码,以此来达到抑制干扰的目的。具体的编码规则不但能对雷达进行序号设定,还预留了车联网扩展应用空间,为将来实现联网通信、交通管理控制、安全急救等扩展应用打好基础。

With the wide application of 77GHz vehicle-carried millimeter-wave radar, the interference problems between radars arise. Radar RF encoding is an important means for anti-interference. A RF encoding way is designed to solve the interference problems between radars according to the operation characteristics of vehicle-carried millimeter-wave radar. Based on the twophase modulation function of the millimeter-wave RF chip, the phase of each cycle is encoded in two phases at the time of transmission, and the signal is decoded according to the known rules at the time of reception to suppress interference. Specific coding rules can not only set the number of the radar, but also reserve the space for the expansion of vehicle networking applications, which are laying a good foundation for the future implementation of networked communications, traffic management and control, safety and emergency services and other expanded applications.