摘要
提出了基于匹配滤波器线性调频压缩技术的数字侦察接收机模型。该模型克服了传统的基于色散延迟线等模拟器件的脉冲压缩接收机精度低、受环境影响大等缺点,采用了匹配滤波器技术使在相同输入条件下输出信噪比最大;同时解决了普通超外差体制全景显示搜索接收机搜索速度、频率分辨率和灵敏度之间的矛盾。实现了中频滤波器和压缩滤波器的设计。仿真结果表明,基于数字化压缩技术的侦察接收机在侦察频段内高速搜索时保持了很高的信号接收灵敏度和频率分辨率,性能稳定,能有效检测到跳频信号。
Digital reconnaissance receiver model based on pulse-compression technology and matcned inter is proposed, in which performance instability of analog pulse-compression receiver is wiped off. Matched filter is used in the model and max SNR is obtained at the same SNR of input. Contradiction between scout velocity of frequency, resolution of frequency and sensitivity is solved in digital reconnaissance receiver of pulse-compres- sion. Intermediate frequency（IF） filter and compression filter are designed. Conclusion of simulation indicates that the resolution of frequency and sensitivity are kept up when the scout frequency of high speed is being pro- gressed, stabilization of performance is excellent, and FH signal can be detected effectively.
出处
《电讯技术》
北大核心
2010年第12期53-57,共5页
Telecommunication Engineering
基金
国家高技术研究发展计划(863计划)项目(2009AAJ208)
中国博士后科学基金资助项目(200902671)~~
关键词
跳频信号检测
全景接收机
脉冲压缩技术
频率分辨率
FH signal detection
full-band receiver
pulse-compression technology
frequency resolution
