摘要
基于外场VHF频段目标特性测量需求,设计一种外场VHF频段宽带RCS测量接收机。该接收机采用预选滤波法提高了接收前端选择性,抑制射频干扰信号,同时设计频率关系,实现宽带信号接收,在后续信号处理中采用相参积累法进一步抑制射频干扰及接收机噪声,提高接收机灵敏度,实现大动态范围信号接收。通过外场试验验证,实测结果与理论仿真结果吻合较好,验证了该设计方案的可行性。
Based on the measurement requirement of the target characteristics of outfield VHF band,a receiver for wideband RCS measurement in outfield VHF frequency band was designed. The preselection filtering method is adopted in the receiver to improve the receiving front-end selectivity and suppress the RF interference signal. The frequency relation was designed carefully to realize the reception of wideband signal. The phase-coherent accumulation method is used in subsequent signal processing to further suppress the RF interference and receiver noise. The receiver sensitivity was improved,and signal reception in large dynamic range was realized. The results from outfield experiments show that the actually-measured result is identical with the theoretical simulation result. The feasibility of the design scheme was verified.
出处
《现代电子技术》
北大核心
2016年第4期139-141,共3页
Modern Electronics Technique
