高速扫频式接收机设计

Design of High-Speed Sweep-Frequency Receiver

扫频式接收机能实现对通信信道频谱的扫描与检测,广泛用于侦察接收系统,实现对信号的截获。随着通信系统的信号朝着短脉冲、低占空比方向的发展,为了实现侦察接收系统的高截获率,人们对扫频式接收机的扫频准确度与速度提出了较高要求。针对这一需求,重点分析减少接收机虚假响应的方法,剖解提高接收机扫频速度的关键电路设计要点。通过实践,所提设计达到了良好的使用效果,满足了对多数信号种类的扫频检测需要。

Sweep-Frequency receiver, for its ability to scan and detect spectrum of communication channels, is widely used in reconnaissance receiver system for signal interception. As communication signal develops towards the direction of short-pulses and low-duty-cycle and for high signal-intercept probability of reconnaisance receiver system, the fairly high requirement on precision and speed of Sweep-Frequency receiver is proposed. This paper here of focuses on how to reduce the spurious response and improve the speed of Sweep-Frequency receiver in the design. The actual practice indicates that this design could achieve the expected effect and meet the requirements, for detection of various signals.