数字接收机抗干扰性能分析研究

Analysis and Research on the Anti-interference Performance of Digital Receiver

模拟锁相环灵敏度高、测量误差小,因而大量地应用于干涉仪、连续波雷达、遥测等设备接收机中,但其存在环路跟踪稳定性的问题。固体发动机尾焰的等离子体,对测控信号能产生很大的信号衰减和相位干扰,使绝大多数的测控设备接收信号误差超差或失锁。为解决此问题,设计了一种新型数字接收机,在靶场某干涉仪上进行了搭载实验,通过大量飞行试验数据处理结果表明取得了很好的效果。

The analog Phase Locked Loop has high sensitivity and low measurement error,so it is widely used in the receiver of such equipment as interferometer, continuous-wave radar,telemetering device ,etc .However,it has the problem of track stability. The plasma in the tail flame of solid engine plays an important part in the attenuation and phase interference of the telemetry and control signal, which makes the received signal error exceed or loop unlocked in most Tl＇＆C（traee track and control） equipments.To resolve the problem,we design a new-style digital receiver,and do some experiments on an interferometer. The processed data results of flight experiments indicate that we have obtained a good effect.