宽带数字信道化接收机自适应门限检测算法实现  

Implementation of Adaptive Threshold Detection Algorithm for Wideband Digital Channelized Receiver

作　　者：颜健 朱扬辉 王斌 YAN Jian;ZHU Yang-hui;WANG Bin(Guilin Changhai Development Co.,Ltd.,Guilin 541000,China)

机构地区：[1]桂林长海发展有限责任公司,广西桂林541000

出　　处：《舰船电子对抗》2023年第1期55-60,共6页Shipboard Electronic Countermeasure

基　　金：广西自然科学基金项目,项目编号:2021JJB170079。

摘　　要：在现代电子侦察中,信号检测依然是最受关注的课题。传统的固定门限的检测方法已经不适用于现在复杂信号环境。为了解决宽带数字信道化接收机等多通道信号检测的应用场景,提出了一种基于自相关能量比值与恒虚警率相结合的方法。基于自相关能量比值,智能判断信号的起始时刻,再通过恒虚警率方法来确定自适应检测门限,进一步提高信号的检测性能。该方法通过现场可编程门阵列(FPGA)硬件实现验证,检测性能好,实时性高,表明该算法在工程应用中具有一定的可行性。In modern electronic reconnaissance, signal detection is still the most concerned topic.The traditional detection method with fixed threshold is not suitable for the complex signal environment nowadays.In order to solve the application scenarios of multi-channel signal detection such as broadband digital channelized receivers, this paper proposes a method based on the combination of autocorrelation energy ratio and constant false alarm rate.On basis of the autocorrelation energy ratio, the starting time of signal is intelligently judged, and then the adaptive detection threshold is determined by the constant false alarm rate method, which further improves the detection performance of signal.The method is verified through field programmable gate array(FPGA) hardware implementation, with good detection performance and high real-time performance, which indicates that the algorithm has certain feasibility in engineering applications.

关 键 词：自相关累加算法 能量比值检测 自适应门限 恒虚警率 

分 类 号：TN971.1[电子电信—信号与信息处理]