摘要
提出了一种M-QAM信号的识别算法。该算法不需要预先知道信号的波特率、载波频率,而是首先从接收信号中估计出这些参数,然后进行插值、解卷、聚类,最后得到识别结果。仿真表明,在信噪比大于8dB且码元数目大于400时,最终的识别率超过了95%。该算法有望用于实际的非协作通信系统中信号的检测和快速识别。
This paper proposed a modulation recognition algorithm for M-QAM signals. This scheme does not require the prior information about baud rate and carry frequency of the received signals. These parameters are estimated first, then interpolation, deconvolution, clustering and recognition are performed. Computer simulations show that the correct recognition ratio is larger than 95% under the condition that the SNR is higher than 8dB and more than 400 symbols are used. So it is suitable for the practical application of signal detection and fast recognition in non-cooperation communication systems.
出处
《通信学报》
EI
CSCD
北大核心
2004年第2期68-74,共7页
Journal on Communications
基金
清华大学"985"基金资助项目(A-2-09)
关键词
M-QAM
调制制式识别
波特率
载波频率
估计
解卷
盲聚类
M-QAM
modulation classification
baud rate
carry frequency
estimation
deconvolution
blind clustering
