| 衰落信道中基于累积量的QAM信号分类 |
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| 引用本文： | 鲍丹,杨绍全.衰落信道中基于累积量的QAM信号分类[J].系统工程与电子技术,2006,28(8):1144-1146. |
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| 作者姓名： | 鲍丹 杨绍全 |
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| 作者单位： | 西安电子科技大学电子工程学院电子对抗研究所,陕西,西安,710071 |
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| 摘 要： | 针对在瑞利和莱斯慢衰落信道下的QAM信号的调制分类问题,提出一种新的基于四阶累积量的调制分类算法。归一化四阶累积量由接收QAM信号的基带信号估计出,与不同星座的理论值比较得到分类准则,其计算复杂度仅为N阶(N为样本个数)。数值仿真实验结果以及与已有方法的比较证明了理论分析的正确性和算法的实用性。
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| 关 键 词： | 调制分类 累积量 解调 衰落 |
| 文章编号： | 1001-506X(2006)08-1144-03 |
| 修稿时间： | 2005年7月19日 |
QAM signal classification over fading channels using cumulants |
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| BAO Dan,YANG Shao-quan.QAM signal classification over fading channels using cumulants[J].System Engineering and Electronics,2006,28(8):1144-1146. |
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| Authors: | BAO Dan YANG Shao-quan |
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| Abstract: | To study the modulation classification problem for M-ary quadrature amplitude modulation(QAM) signals traveled over slowly Rayleigh and Rician fading channels,a new algorithm based on fourth-order cumulants is proposed.This normalized fourth-order cumulants are estimated from baseband sequences of the received QAM signals.The decision rules for classification are developed based on the theoretical values of the normalized fourth-order cumulants for various constellations.Computational complexity of the developed algorithm is order N,where N is the number of the complex baseband data samples.Theoretical arguments are verified via extensive simulations and comparisons with existing approaches. |
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| Keywords: | modulation classification cumulant demodulation fading |
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