| 基于循环累积量的星形QAM载波盲估计 |
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| 引用本文： | 郑文秀,赵国庆,罗明. 基于循环累积量的星形QAM载波盲估计[J]. 系统工程与电子技术, 2008, 30(2): 233-235 |
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| 作者姓名： | 郑文秀 赵国庆 罗明 |
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| 作者单位： | 西安电子科技大学电子工程学院,陕西,西安,710071 |
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| 摘 要： | 针对通信对抗和正交幅度调制(QAM)信号解调的实际应用,提出一种利用特定高阶循环累积量估计星形QAM载波的方法。由于高阶循环累积量能有效抑制平稳噪声和非平稳高斯噪声,通过理论分析可证明在上述噪声背景下,星形8、16 QAM信号的特定四阶循环累积量仅在载波位置处存在,因此可以通过检测此循环频率实现载波的估计。该算法可推广到更高阶星形QAM信号。仿真实验验证了该算法的有效性。
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| 关 键 词： | 电子对抗 正交幅度调制 信号检测 参数估计 |
| 文章编号： | 1001-506X(2008)02-0233-03 |
| 修稿时间： | 2006-11-01 |
Blind estimation of star-QAM carrier frequency based on the cyclostationary cumulants |
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| ZHENG Wen-xiu,ZHAO Guo-qing,LUO Ming. Blind estimation of star-QAM carrier frequency based on the cyclostationary cumulants[J]. System Engineering and Electronics, 2008, 30(2): 233-235 |
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| Authors: | ZHENG Wen-xiu ZHAO Guo-qing LUO Ming |
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| Abstract: | Aiming at the real application of the communication countermeasures and QAM signal demodulation,a method is proposed to estimate the carrier frequency of star-QAM signal using the high-order cyclostationary cumulants.Due to the fact that the high-order cyclostationary cumulants can suppress the stationary and non-stationary Gaussian noise,it is proved by theoretical analysis under the above noise background that the specific four-order cyclostationary cumulants of the star 8/16 QAM signal exist only at the location of its carrier frequency,so that the carrier estimation can be implemented by detecting the cyclo-frequency.And simulation also proves the effectivity of the proposed method. |
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| Keywords: | military electronic countermeasures QAM signal detection parameter estimation |
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