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| Subspace Tracking Channel Estimation for Training-Sequence-Based OFDM Systems with Transmitter Diversity |
| Xu Xin①②; Cai Yue-ming①; Xu You-yun① |
| ①Institute of Communications Eng., PLA Univ. of Sci. & Tech., Nanjing 210007 China;②Net. Tech. Management Center of Comm., Jinan Military Area Jinan 250002 China |
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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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Received: 03 July 2003
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2005, Vol. 27 
