| 摘要: |
| 针对Mark XIIA系统模式5信号处理的需求，对模式5信号的格式和基本特征进行了分析，提出了一种基于模式5信号时域和调制域特征的识别方法。该方法通过提取模式5信号脉冲时域参数和对脉冲进行MSK解调，获取模式5前导脉冲时域参数脉宽和前导脉冲固有的16位MSK解调结果0111100010001001来完成模式5信号前导脉冲识别，并根据前导脉冲偏移值特点优化了模式5信号框架匹配算法流程，实现了模式5信号的识别处理。Matlab仿真和硬件实现验证了方法的有效性，当满足一定信噪比条件时，识别正确率可达100%。 |
| 关键词: 敌我识别系统；模式5；信号识别 时域调制域特征 |
| DOI： |
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| 基金项目: |
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| Identification of IFF Mode 5 signals based on time&modulation domain characteristics |
| LONG Hui-min |
| () |
| Abstract: |
| According to the new Mark XIIA Identification Friend or Foe（IFF）System Mode 5 signal processing requirement,the format and features of Mode 5 are analyzed and a new IFF Mode 5 identification method is proposed based on time and modulation domain characteristics of Mode 5. Through Mode 5 pulse width(PW) parameter extraction and MSK demodulation,this method combines with the PW parameter and inherent 16 bit MSK code 0111100010001001 of Mode 5 preamble pulse to complete the preamble pulse recognition.Furthermore,according to the stagger of preamble pluses,an optimized algorithm is used to realize pulses frame matching. Both the simulation and experimental results verify the correctness and validity of the method,and the correct identification rate is up to 100% under a given signal-to-noise ratio(SNR) condition. |
| Key words: IFF system Mode 5 signal identification time&modulation domain characteristics |
