基于正交约束的导航接收机空时自适应方法

卫星导航系统容易受到干扰，空时自适应处理在导航接收机抗干扰方面拥有明显的优势，即系统自由度显著提高，但是传统空时自适应处理应用于导航接收机抗干扰中却面临信号失真的难题。该文提出一种基于正交约束的导航接收机空时自适应处理方法。该方法从空时自适应处理的原理入手修改传统空时自适应处理优化的约束项，消除了不同时延信号对合成信号的影响，保证了空时自适应处理在有效抑制干扰的同时不影响导航信号的捕获和解码。理论分析和仿真结果表明，该方法能有效解决空时自适应处理中的导航信号失真问题。

Space Time Adaptive Processing Technique Based on Orthogonal Constraint in Navigation Receiver

Satellite navigation systems is susceptible to jamming, Space-Time Adaptive Processing (STAP) technique has obvious advantage in the anti-jamming of navigation receiver, i.e. system Degree Of Freedom (DOF) visibly increasing, but traditional STAP would bring serious signal distortion in navigation receiver anti-jamming. In this paper, a novel STAP method based on orthogonal constraint in navigation receiver is proposed. This method modifies the constraint of traditional STAP based on the principle of STAP, avoids the influence of the delay time signal, the jamming is efficiently suppressed by STAP in the acquisition and decoding of navigation signal. Theory analysis and simulation indicate that the novel technique can solve the problem of navigation signal distortion in STAP efficiently.