| 张体奎,李森森,郁 滨.蜂窝移动网类语音信号加密通信同步方案研究[J].电子测量与仪器学报,2020,34(1):163-170 |
| 蜂窝移动网类语音信号加密通信同步方案研究 |
| Research on speech like signal synchronization scheme of encrypted communication in cellular mobile networks |
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| DOI： |
| 中文关键词: 蜂窝移动网 加密通信 类语音 同步捕捉 精确定位 |
| 英文关键词:cellular mobile network encrypted communication speech-like signal signal capture accurate positioning |
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| 中文摘要: |
| 针对蜂窝移动网加密通信中的类语音信号同步问题，提出一种时域分析与快速相关法相结合的同步方案，该方案在建立两阶段同步模型的基础上，基于正弦信号时域特征分析，设计后置校验算法，实现同步信号捕捉。进一步，通过线性调频信号相关性计算，设计同步偏差补偿算法，实现同步信号精确定位。实验结果表明，在GSM与LTE制式网络中同步信号检测误检率与漏检率均小于001%，5样点以上偏差比例小于003%，检测性能好且计算复杂度低。 |
| 英文摘要: |
| Aiming at the problem of speech like signal synchronization in encrypted communication across cellular mobile networks, a synchronous scheme combining time domain analysis with fast correlation method is proposed. On the basis of establishing the two stage synchronization model, the synchronous signal capture is implemented via the analysis of time domain characteristics of sinusoidal signal and the post calibration algorithm. Furthermore, the accurate positioning of synchronous signals is achieved through the correlation calculation of Linear FM signals and the synchronous deviation compensation algorithm. Experimental results show that both of the error rate and leakage rate in the detection of synchronous signals are less than 001%, and the ratio of deviation that more than 5 samples is less than 003% in GSM and LTE network. The proposed scheme has good detection performance and low computational complexity. |
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