GNSS接收机的消除互相关干扰算法及其实现

研究了强弱信号互相关干扰问题和干扰消除算法及其实现.使用强弱信号分离的通道结构,通过强信号通道对强信号的跟踪结果和弱信号通道对弱信号参数的估计,计算强信号对弱信号造成的互相关干扰;利用多普勒频移和码相位差修正此互相关值;最后,从弱信号通道的相关结果中去除强弱信号的互相关成分,完成消除强信号对弱信号的干扰,提高接收机的灵敏度.该方法容易实现,对简化接收机基带芯片设计具有指导意义.

Implementation of Cross-Correlation Interference Mitigation Algorithm for GNSS Receiver

Cross correlated interference of strong/weak signals and mitigation algorithm were presented, along with its implementation.The strong/weak signal channels were separated to track each corresponding signal, respectively.The cross correlation between strong and weak signals was computed.The resulting values were corrected by using relative Doppler frequency shift and fraction code phase difference.The cross correlation was wiped off from weak signal channel to eliminate the interference.The method achieves higher sensitivity and is easy to implement.