QAM信號的非數(shù)據(jù)輔助信噪比估計(jì)方法
The NDA SNR Estimation for QAM Signals
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摘要: 該文利用統(tǒng)計(jì)量的知識,推導(dǎo)了QAM信號在加性高斯白噪聲信道且星座任意一點(diǎn)的發(fā)送概率相同條件下的非數(shù)據(jù)輔助(盲)信噪比估計(jì)算法。文章以128QAM信號為例進(jìn)行了具體的分析和計(jì)算機(jī)仿真,分析和仿真的結(jié)果表明該算法對實(shí)際感興趣的信噪比范圍都可進(jìn)行有效估計(jì)。
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關(guān)鍵詞:
- QAM信號; 信噪比估計(jì); 數(shù)據(jù)擬合
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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