| 识别LSB和USB的门限自适应算法 |
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| 引用本文： | 方晓青,纪勇,徐佩霞.识别LSB和USB的门限自适应算法[J].应用科学学报,2003,21(1):1-4. |
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| 作者姓名： | 方晓青 纪勇 徐佩霞 |
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| 作者单位： | 中国科学技术大学电子工程与信息科学系,安徽,合肥,230027 |
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| 摘 要： | 基于语音谱的统计特性提出了一种从模拟话音SSB信号中自动识别出LSB或USB调制方式的算法。该算法简单，计算量小，非常适合用DSP来实时实现；门限自适应处理使得该算法鲁棒性较好。仿真结果表明该算法在低信噪比时仍有令人满意的识别效果。
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| 关 键 词： | LSB USB 门限自适应算法 语音谱 Rayleigh信道 语音信号识别 单边带调制方式 特征提取 |
| 文章编号： | 0255-8297(2003)01-0001-04 |
| 修稿时间： | 2001年12月20 |
Automatic Recognition Algorithm of the Upper Sideband and the Lower Sideband SSB Signals by Using the Adaptive Threshold |
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| FANG Xiao-qing,JI Yong,XU Pei-xia.Automatic Recognition Algorithm of the Upper Sideband and the Lower Sideband SSB Signals by Using the Adaptive Threshold[J].Journal of Applied Sciences,2003,21(1):1-4. |
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| Authors: | FANG Xiao-qing JI Yong XU Pei-xia |
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| Abstract: | Based on the statistical characterisitic of speech spectrum, a new algorithm which can distinguish LSB or USB cases of speech from SSB signals without any prior information is presented here. It is simple and very suitable for DSP's real-time implementation, and the adaptive threshold increases the algorithm's robustness. The simulation results show that this algorithm gives good performance even under the conditions of low SNR values. |
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| Keywords: | single sideband speech spectrum Rayleigh channel adaptive threshold |
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