基于码字统计与相位差匹配的IFF混叠信号分离方法  

Mixed IFF Signals Separation Method Based on Codeword Statistics and Phase Difference Matching

作　　者：柏如龙[1,2] 霍立寰 陈建峰 闫涛[1] 许瑞杰[1] 孙超 BAI Ru-long;HUO Li-huan;CHEN Jian-feng;YAN Tao;XU Rui-jie;SUN Chao(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Hebei Key Laboratory of Electromagnetic Spectrum Cognition and Control,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北省电磁频谱认知与管控重点实验室,河北石家庄050051

出　　处：《舰船电子对抗》2023年第1期78-80,96,共4页Shipboard Electronic Countermeasure

基　　金：河北省重大科技成果转化专项基金项目,项目编号:14040322Z。

摘　　要：针对多通道监视系统同时截获大量敌我识别(IFF)脉冲混叠交织的问题,提出了一种基于码字频次统计与相位差匹配的IFF混叠信号分离方法,首先通过码字频次统计,挑选身份码对应的相位差样本,其次通过相位差匹配分离其它模式的样点,最终可以准确识别出单个目标的不同模式码字取值,并对少量错误码字进行纠错。试验结果表明,该方法能够实现密集信号分离,获取准确的相位差观测数据和目标码字取值,由此实现对空中目标的准确监视。Aiming at the problem that a large number of pulses of identification foe or friend(IFF) captured by multi-channel monitoring system are mixed and interwove at the same time, an IFF aliasing signal separation method based on the codeword frequency statistics and phase difference matching is proposed.Firstly, the phase difference samples corresponding to the identity codes are selected based on the codeword frequency statistics.Secondly, the sampling points of other modes are separated through phase difference matching.Finally, the codeword values of different modes of single target are identified accurately and a few error codewords are corrected.The test results show that the proposed method can achieve the separation of dense signals and obtain accurate phase difference observation data and the target codeword values, so the accurate monitoring of air target is realized.

关 键 词：码字统计 相位差匹配 混叠信号分离 测向接收机 

分 类 号：TN971.1[电子电信—信号与信息处理]