GNSS抗干扰中LCMV算法研究及仿真

Research and simulation of LCMV algorithm in GNSS anti-interference

由于GNSS卫星信号强度极小,容易受到强信号干扰,针对如何有效抗干扰问题,将基于功率倒置天线阵列LCMV算法在一定的数学模型基础上利用理论进行推演,并稍加改进避免了矩阵求逆,然后通过Matlab仿真加以验证,最后为该算法的实现进行了硬件设计。提出了以FPGA结合DSP的处理方案,利用FPGA完成射频采集,由DSP进行抗干扰处理以及LCMV算法实现。

The satellite signal strength of GNSS is low, so that it can be easily interfered by powerful signal. To effectively resist interference, based on power-inversion adaptive array, LCMV algorithm is deduced in certain mathematical model and is improved to avoid computing the inverse of matrix. It is verified by Matlab simulation. The hardware design is provided. FPGA and DSP are integrated： FPGA is used for radio frequency collection, while DSP is used for anti-interference operation and realization of LCMV algorithm.