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
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.
2005, Vol. 27 
