摘要
在雷达中频数字信道化中为了简化实现多种带宽的设计要求,提出了数字变带宽设计方法改变接收信道的带宽。首先,与传统的模拟变带宽的设计方法比较分析表明,该方法具有降低多带宽接收信道设计复杂程度的优点;然后,通过建立理论模型,对其进行仿真和分析,理论原理可行。最后通过实测某雷达回波信号进行验证,仿真结果和实测结果基本一致。结果表明,该方法不影响接收信道输出信噪比,同时又能简单实现接收信道的多种带宽改变,具有可行性和工程实用性。
To simplify radar IF digital receiver design which needs various bandwidth,a digital-bandwidth adjustment method is proposed to change the receiver′s bandwidth.Firstly,this method and conventional analog-bandwidth adjustment are compared and analyzed to show the advantage in reducing variable bandwidth receiver design complexity.Then this method is proved to be feasible by modeling and simulating.Finally,it is validated by measuring a radar return signal on the spot,and the experimental data is basically in accordance with that of simulation.The results shows that the method doesn′t affect receiver output SNR（Signal-to-Noise Ratio） and can simply complishes many bandwidth adjustments in digital domain,so it possesses feasibility and engineering applicability in real radar channel design.
出处
《电讯技术》
北大核心
2013年第8期1079-1083,共5页
Telecommunication Engineering
关键词
雷达接收机
中频数字信道化
数字变带宽
radar receiver
digital IF channelized
digital bandwidth adjustment
