Chen Zhi-gang, Zhang Tai-yi, Gong Zheng-wei. Finite-Alphabet and Decision-Feedback Based Channel Estimation for Space-Time Coded OFDM Systems[J]. Journal of Electronics & Information Technology, 2008, 30(2): 451-454. doi: 10.3724/SP.J.1146.2006.01116
Citation:
Chen Zhi-gang, Zhang Tai-yi, Gong Zheng-wei. Finite-Alphabet and Decision-Feedback Based Channel Estimation for Space-Time Coded OFDM Systems[J]. Journal of Electronics & Information Technology, 2008, 30(2): 451-454. doi: 10.3724/SP.J.1146.2006.01116
Chen Zhi-gang, Zhang Tai-yi, Gong Zheng-wei. Finite-Alphabet and Decision-Feedback Based Channel Estimation for Space-Time Coded OFDM Systems[J]. Journal of Electronics & Information Technology, 2008, 30(2): 451-454. doi: 10.3724/SP.J.1146.2006.01116
Citation:
Chen Zhi-gang, Zhang Tai-yi, Gong Zheng-wei. Finite-Alphabet and Decision-Feedback Based Channel Estimation for Space-Time Coded OFDM Systems[J]. Journal of Electronics & Information Technology, 2008, 30(2): 451-454. doi: 10.3724/SP.J.1146.2006.01116
A novel blind channel estimation scheme is presented for Space-Time Coded OFDM (STC-OFDM) systems. This scheme is composed of rude channel estimation by exploiting the finite-alphabet property of information signals and fine channel estimation by using decision-directed method, which employs the priori knowledge of the transmitted signals other than the finite-alphabet property of mapping constellation. At the cost of a little more computational complexity, it achieves better performance than the competitive one, hence it is suitable for STC-OFDM systems with a small number of subcarriers in slowly time-varying and not severely frequency selective channels. The scheme is tested with simulations and also compared with the subspace-based channel estimation.
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