用于GPS接收机的多级干扰抑制系统

A multistage interference rejection system for GPS

全球定位系统(GPS)是一种广泛应用于民用和军用的单向卫星通信系统。由于相对较低的接收信号功率,使得GPS非常容易地受到各种有意或无意的干扰。提出利用多级空时自适应处理(STAP)来改善GPS接收机在较宽范围内存在干扰环境下的检测性能。根据干扰的类型,多级干扰抑制系统可以结合有关信号处理单元,如凹槽滤波器,波束形成器,以及盲线性干扰消除器等。计算机仿真结果验证了该多级干扰抑制系统可以有效地消除宽带和窄带干扰。

The Global Position System （GPS） is a one-way satellite communication system widely used for both civilian and military applications. Because of the relative low power of the received signals, GPS is highly susceptible to a variety of intentional and unintentional interferers. We examine a multistage space-time adaptive processing （STAP） that is used to improve the detection capability of a GPS receiver for a wide range of jamming conditions. Depending on the type of interference, the stages incorporate structure such as a notch filter, a beamformer, and a blind linear interference canceler. Computer simulations are provided to illustrate the performance of the multistage receiver for wideband and narrowband interferers.