基于訓(xùn)練序列的發(fā)射分集OFDM系統(tǒng)的空時(shí)子空間幅度跟蹤信道估計(jì)
Subspace Tracking Channel Estimation for Training-Sequence-Based OFDM Systems with Transmitter Diversity
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摘要: 該文將基于訓(xùn)練序列的發(fā)射分集正交頻分復(fù)用(OFDM)系統(tǒng)視為一個(gè)多時(shí)隙系統(tǒng),利用空時(shí)信道空間(波達(dá)方向)子空間和時(shí)延子空間慢變的特點(diǎn),將空時(shí)信道多時(shí)隙估計(jì)技術(shù)應(yīng)用到發(fā)射分集OFDM系統(tǒng)中,并根據(jù)衰落幅度快變的特點(diǎn)提出了使用自適應(yīng)濾波技術(shù)的空時(shí)子空間幅度跟蹤信道估計(jì)算法,明顯提高了系統(tǒng)的信道估計(jì)精度。該文對(duì)各種算法的跟蹤性能進(jìn)行了仿真和分析比較。Abstract: Since the channel has slowly-varying delays and directions of arrival and fast-varying faded amplitudes, benefits can be obtained by space-time processing base these channel features. In this paper, the space-time subspace and amplitude tracking algorithms using adaptive filtering technique are proposed by taking a training-sequence-based OFDM system with transmitter diversity as a multi-slot communications system and the channel estimation performance is observably improved. At the same time, this paper gives some simulations and comparisons of the performance of the different tracking algorithms.
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Nicoli M, Simeone O, Spagnolini U. Multislot estimation of fast-varying space-time communication channels[J].IEEE Trans.on Signal Processing.2003, 51(5):1184-[2]van der Veen A, Vanderveen M C, Paulraj A. Joint angle and delay estimation using shift-invariance techniques[J].IEEE Trans.on Signal Processing.1998, 46(2):405-[3]Strobach P. Low-rank adaptive filter[J].IEEE Trans. on Signal Processing.1996,44(12):2932-[4]Stewart G W. Methods of simultaneous iteration for calculating eigenvectors of matrices[A]. J. H. Miller. In Topics in Numerical Analysis Ⅱ[M]. New York: USA, 1975:169 - 185.[5]Wax M, Kailath T. Detection of signals by information theoretic criteria[J]. IEEE Trans. on Acoustics, Speech, and Signal Processing, 1985, ASSP-33(2): 387 - 392. -
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