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	An EM-based time-domain channel estimation algorithm using a priori information
	Feng Yang ; Yu Zhang ; Jian Song ; Changyong Pan ; Zhixing Yang
	2010-10-12 ; 2010-10-12
关键词	Practical/ channel estimation error statistics expectation-maximisation algorithm mean square error methods OFDM modulation time-domain analysis/ EM-based time-domain channel estimation algorithm a priori information expectation-maximization algorithm iterative time-domain channel estimation orthogonal frequency division multiplexing systems bit error rate performance SNR gain estimation mean square error Cramer-Rao bound/ B6150D Communication channel equalisation and identification B0240Z Other topics in statistics B0290F Interpolation and function approximation (numerical analysis) B0220 Mathematical analysis B6120 Modulation and coding methods
中文摘要	Based on the expectation-maximization (EM) algorithm, an iterative time-domain channel estimation approach capable of using a priori information is proposed for orthogonal frequency division multiplexing (OFDM) systems in this letter: it outperforms its noniterative counterpart in terms of estimation accuracy as well as bit error rate (BER) performance. Numerical simulations demonstrate that an SNR gain of 1 dB at BER = 10/sup -4/ with only one iteration and estimation mean square error (MSE) which nearly coincides with the Cramer-Rao bound (CRB) in the low SNR region can be obtained, thanks to the efficient use of a priori information.
语种	英语
出版者	IEICE ; Japan
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/82650]
专题	清华大学
推荐引用方式 GB/T 7714	Feng Yang,Yu Zhang,Jian Song,et al. An EM-based time-domain channel estimation algorithm using a priori information[J],2010, 2010.
APA	Feng Yang,Yu Zhang,Jian Song,Changyong Pan,&Zhixing Yang.(2010).An EM-based time-domain channel estimation algorithm using a priori information..
MLA	Feng Yang,et al."An EM-based time-domain channel estimation algorithm using a priori information".(2010).

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