Computer Engineering and Applications ›› 2013, Vol. 49 ›› Issue (13): 204-206.

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Application of spectral entropy and spectral subtraction in CMMB

XU Xiaomei, LU Zhouxun   

  1. College of Electronics and Information Engineering, Nanjing University of Technology, Nanjing 211800, China
  • Online:2013-07-01 Published:2013-06-28

谱熵和谱减法在CMMB信道估计中的应用

徐晓梅,鲁周迅   

  1. 南京工业大学 电子与信息工程学院,南京 211800

Abstract: The method of signal detection based on spectral entropy and spectral subtraction is widely used in the processing of voice. But till now, this method is rarely used in the channel estimation based on CMMB(China Mobile Multimedia Broadcasting). The algorithm based on entropy is used in channel estimation. The simulation illustrates that this algorithm performs well in low SNR(Signal Noise Ratio).

Key words: entropy, China Mobile Multimedia Broadcasting(CMMB), channel estimation, Signal Noise Ratio(SNR)

摘要: 基于谱熵和谱减法的信号检测方法在语音处理领域得到了广泛应用,但至今没有发现将这种方法应用于基于中国移动多媒体即CMMB(China Mobile Multimedia Broadcasting)标准的信道估计中。将这种方法用于基于CMMB标准的系统信道估计中;仿真结果表明,该方法在信噪比很低时,较传统的CMMB系统信道估计方法有较好的效果。

关键词: 谱熵, 中国移动多媒体(CMMB), 信道估计, 仿真, 信噪比