同时到达信号数字信道化检测技术研究  

Digital channelized detection of simultaneous arrival signals

作　　者：何鹏[1] 韩俊辉[1] HE Peng;HAN Junhui(The 41st Research Institute of China Electronics Technology Group Corporation,Qingdao 266555,China)

机构地区：[1]中国电子科技集团公司第四十一研究所,山东青岛266555

出　　处：《现代电子技术》2023年第5期20-24,共5页Modern Electronics Technique

摘　　要：针对宽带反辐射导引头对瞬时带宽内多个威胁目标同时捕获跟踪问题,研究基于数字信道化接收机的同时到达信号检测方法。在FPGA中对数字信道化接收机所有子信道输出数据进行动态延迟缓存,然后根据双门限判别原则对缓存后的数据进行轮询检测,在脉冲上升沿时启动有效数据存储,在脉冲下降沿时根据有效子信道数量以及单个脉冲跨越子信道数量进行综合判断,识别并分离出同时到达信号。文中提出一种基于动态数据延迟控制和子信道轮询的多信号检测方法,有效节省了FPGA硬件资源,具备对100 ns量级极窄雷达脉冲信号的捕获能力,为多通道宽带数字信道化接收机的FPGA实现提供了新的方法。测试结果表明,该方法可实现800 MHz瞬时带宽内2路同时到达信号的检测分离,具有较高的工程实用价值。In allusion to the problem of tracking the multiple threat targets within instant bandwidth by wideband anti-radiation seeker,a method of simultaneous arrival signals detection based on digital channelized receiver is proposed. The dynamic delay buffer for all the sub-channels′ output data of digital channelized receiver are performed in FPGA. The roll polling detection of the buffered data is carried out according to double-threshold discriminating principle. The valid data storage is started at pulse rising edge,the synthetic judgement is made at pulse falling edge according to the numbers of effective subchannels and single pulses crossing sub-channel,and then the simultaneous arrival signals are recognized and separated. In this paper,a multi-signal detection method based on dynamic data delay control and sub-channel roll polling is proposed,which effectively saves FPGA hardware resources and has the ability to capture extremely narrow radar pulse signals of the magnitude of 100 ns. It provides a new method for the FPGA implementation of multi-channel broadband digital channelization receiver.The testing results show that the proposed method can realize the detection and separation of two simultaneous arrival signals in 800 MHz instantaneous bandwidth,which has high engineering practical value.

关 键 词：信号检测 数字信道化 数据检测 数据缓存 信号分离 信号识别 

分 类 号：TN911.6-34[电子电信—通信与信息系统]