QAM信号的非数据辅助信噪比估计方法
The NDA SNR Estimation for QAM Signals
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摘要: 该文利用统计量的知识,推导了QAM信号在加性高斯白噪声信道且星座任意一点的发送概率相同条件下的非数据辅助(盲)信噪比估计算法。文章以128QAM信号为例进行了具体的分析和计算机仿真,分析和仿真的结果表明该算法对实际感兴趣的信噪比范围都可进行有效估计。
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关键词:
- QAM信号; 信噪比估计; 数据拟合
Abstract: This paper deduces the NDA SNR estimation algorithm for QAM signals in additive Gaussian white noise channel and on the condition of the equivalent a priori probability of transition signals positioning on every constellation point by using statistics. And the detail analysis and computer simulation for 128QAM signals are done. It is proved that the whole range interested in practice can be estimated by this algorithm. -
Summer T A, Wilson S G. SNR mismatch and online estimation in turbo decoding. IEEE Trans. on Communications, 1998, COM46(4): 421 - 423.[2]Ramesh A, Chockalingam A, Milstein L B. SNR estimation in generalized fading channels and its application to turbo decoding.Proc. IEEE ICC, 2001, Helsinki, Finland, 2001: 1094 - 1098.[3]Shin Dong-Joon, Sung Wonjin, Kim In-Kyung. Simple SNR estimation methods for QPSK modulated short bursts. Proc.IEEE Globalcom, 2001, San Antonio, Texas, USA, 2001: 3644-3647.[4]Jablon N K. Joint blind equalization, carrier recovery, and timing recovery for high-order QAM signal constellations[J].IEEE Trans.Signal Processing.1992, 40(6):1383-[5]John G. Proakis Digital Communication. 3rd ed., New York:McGraw-Hill, 1995:278 - 282. -
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