基于FPGA的脉内调制雷达信号识别算法  

Recognition Algorithm of Intra-pulse Modulation Radar signal Based on FPGA

作　　者：王宇[1] 杨国彬[1] 王宏[1] 

机构地区：[1]中国电子科技集团公司第五十一研究所,上海201802

出　　处：《舰船电子对抗》2017年第2期51-55,共5页Shipboard Electronic Countermeasure

摘　　要：针对脉内调制雷达信号检测,提出了一种基于现场可编程门阵列(FPGA)的脉内调制特征实时提取技术,利用时-频分析、瞬时自相关、时域累加平滑的方法,实现对常见脉内调制雷达信号(简单脉冲信号、二进制相移键控(BPSK)信号、正交相移键控(QPSK)信号、线性频率调制(LFM)信号、频移键控(FSK)信号)实时检测及脉内调制样式实时提取,并将脉内调制类型与常规PDW字结合构成扩展脉冲描述字(EPDW)。测试结果证明了该方法实时性好、准确率高。Aiming at the detection of intra-pulse modulation radar signal, this paper puts forward a real-time extracting technique of intra-pulse modulation characteristic based on field-programmable gate array （FPGA）, uses the methods of time-frequency analysis, instantaneous auto-correlation, time-domain accumulation smooth to detect several common intra-pulse modulation radar signals： simple pulse signal, binary phase shift keying （BPSK） signal, quaternary phase shift keying （QPSK） signal,linear frequency modulation （LFM） signal,frequency shift keying （FSK） signal in real time,and extract the intra-pulse modulation modes in real time,and combines the intra-pulse modulation type with general pulse description word （PDW） to form the extension pulse description word （EPDW）. The testing results demonstrate that the method has good real-time performance and high precision.

关 键 词：时-频分析 脉内调制 瞬时自相关 现场可编程门阵列 

分 类 号：TN971.1[电子电信—信号与信息处理]