| 低信噪比下数字幅度调制的调制进制快速识别 | |
| 魏小薇 ; 曹志刚 ; WEI Xiaowei ; CAO Zhigang | |
| 2010-06-09 ; 2010-06-09 | |
| 关键词 | 信号处理 调制识别 小波变换 signal processing digital modulation wavelet transform TN911.3 |
| 其他题名 | Fast identification of the amplitude modulation level at low signal-to-noise ratios |
| 中文摘要 | 为了快速自动识别低信噪比下的数字幅度调制进制,提出了一种识别M进制正交幅度调制(M-QAM)和M进制幅度键控(M-A SK)的调制进制的方法。该方法利用优化的缩放尺度对信号进行小波变换,以识别M-QAM和M-A SK信号的调制进制,并进行了仿真。仿真结果表明:仅利用100个观测符号,当信噪比大于或等于-4 dB时,M-QAM信号的正确识别率大于93%;当信噪比大于或等于-10 dB时,M-A SK信号的正确识别率大于90%。这说明该方法在低信噪比下能够快速获得很好的识别性能。; A method to identify the modulation levels of M-ary Quadrature Amplitude Modulation(M-QAM) and M-ary Amplitude shift keying(M-ASK) was developed to rapidly and automatically identify the modulation levels of digitally modulated signals at low signal-to-noise ratios(SNR).The method uses wavelet transforms with the optimal scale to identify the modulation levels of the M-QAM and M-ASK signals.Simulation results show that when the SNR is not lower than-4 dB,the percentage of correct identification of M-QAM is higher than 93% and when the SNR is not lower than-10 dB,the percentage of correct identification of M-ASK is higher than 90%,using only 100 observed symbols.The results show that the method can rapidly acquire good performance at low SNR. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/54531]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 魏小薇,曹志刚,WEI Xiaowei,等. 低信噪比下数字幅度调制的调制进制快速识别[J],2010, 2010. |
| APA | 魏小薇,曹志刚,WEI Xiaowei,&CAO Zhigang.(2010).低信噪比下数字幅度调制的调制进制快速识别.. |
| MLA | 魏小薇,et al."低信噪比下数字幅度调制的调制进制快速识别".(2010). |
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