| 摘要: |
| 为完全识别当前卫星通信采用的主要调制方式，结合循环谱和高阶累积量两种信号调制识别方法的特点，提出了一种联合识别算法。该算法将循环谱特征加入到高阶累积量识别法中，联合多种特征参数判决构建识别器，首先利用循环谱完成ASK、FSK、PSK信号的类间识别以及FSK信号的类内识别，在此基础上利用高阶累积量方法完成FSK、PSK信号的类内识别。仿真结果表明，该算法能够完全区分卫星通信中主要的调制模式{ASK、2ASK、2FSK、4FSK、BPSK、QPSK}，在信噪比高于5 dB时识别率达88%以上。 |
| 关键词: 卫星通信 调制识别 循环谱 高阶累积量 |
| DOI： |
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| 基金项目: |
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| A combined modulation recognition based on cyclic spectrum and high-order cumulants |
| CHEN Zeyi |
| () |
| Abstract: |
| To solve the problem of satellite communication signal modulation mode recognition, a novel method based on the cyclic spectrum and high-order cumulants is proposed.In this method,the cyclic spectrum feature is added in the high-order cumulants method and many feature parameter dicisions are combined to construct identifier, cyclic spectrum is used to solve the classification problem of ASK,FSK,PSK and {2ASK,4ASK}modulation recognition firstly, then,higher-order cumulants method is adopted to realize class recognition of FSK,PSK modulation signal. Simulation results show that the algorithm can recognize the main modulations {ASK,2ASK,2FSK,4FSK,BPSK,QPSK} used by satellite communication and the average recognition rate is more than 88% when the signal-to-noise ratio(SNR)≥5 dB. |
| Key words: satellite communication modulation recognition cyclic spectrum high order cumulants |
