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应用科学学报 ›› 2003, Vol. 21 ›› Issue (1): 1-4.

• 论文 •    下一篇

识别LSB和USB的门限自适应算法

方晓青, 纪勇, 徐佩霞   

  1. 中国科学技术大学电子工程与信息科学系 安徽 合肥 230027
  • 收稿日期:2001-12-20 修回日期:2002-03-05 出版日期:2003-03-10 发布日期:2003-03-10
  • 作者简介:方晓青(1980-),男,安徽狱县人,博士生;徐佩霞(1941-),女,浙江郸县人,教授,博导.

Automatic Recognition Algorithm of the Upper Sideband and the Lower Sideband SSB Signals by Using the Adaptive Threshold

FANG Xiao-qing, JI Yong, XU Pei-xia   

  1. Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027, China
  • Received:2001-12-20 Revised:2002-03-05 Online:2003-03-10 Published:2003-03-10

PDF

102

被引次数

3

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.

关键词: 语音谱, Rayleigh信道, 单边带, 自适应门限

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.

Key words: single sideband, speech spectrum, Rayleigh channel, adaptive threshold

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