三种GNSS接收机全局最优空时抗干扰算法性能分析

Performance analysis of three global optimum spatial-temporal anti-jamming algorithms for GNSS receivers

GNSS接收机的军事应用必须适应强干扰环境。基于全局最优空时抗干扰接收机方案,提出了利用解扩一再扩频处理和基于DOA估计的两种全局最优空时抗干扰新算法,讨论了三种GNSS接收机全局最优空时抗干扰算法的不同使用条件和应用场景,仿真分析了三种GNSS接收机全局最优空时抗干扰算法在多干扰信号环境下的性能。仿真结果表明,在多个宽带和窄带干扰并存、干扰信号个数大于天线阵元个数的复杂干扰环境下,三种抗干扰算法均能达到综合较优的抗干扰性能。

GNSS receivers used in military equipment should have strong anti-jamming capability.Based on the global optimum spatial-temporal anti-jamming scheme,two new such algorithms are presented,namely despread-respread processing and DOA esti mation,and different service conditions and application scenarios of three algorithms for GNSS receiver are discussed.The perform ance of these algorithms in the multi-interference environment are analyzed through simulation.The results show that all three algo rithms have delivered good anti-jamming performance in the complex interference environment where multiple broadband and narrow band interference coexist and the number of interference signals is greater than that of antenna array elements.