Title :
A New Iterative Channel Estimation Scheme for V-BLAST MIMO-OFDM Systems
Author :
Qiao, Xiaoqiang ; Zhao, Hangsheng ; Li, Yusheng ; Liu, Yongxiang
Author_Institution :
Nanjing Telecommun. Technol. Inst., Nanjing
Abstract :
A new iterative channel estimation scheme for V-BLAST MIMO-OFDM systems is proposed in this paper. The channel estimation consists of two parts. Firstly, we use pilot-symbol-aided (PSA) method to interpolate the channel, and get the initial channel estimation of the systems. Then, with Turbo iterative decoding, we feedback the information bits to the channel estimator and the EM algorithm is used for iterative channel estimation. The simulation results show that the channel estimation performance of the systems is improved greatly as the number of iterations increases.
Keywords :
MIMO communication; OFDM modulation; channel coding; channel estimation; interpolation; iterative decoding; space-time codes; turbo codes; EM algorithm; V-BLAST MIMO-OFDM system; channel interpolation; iterative channel estimation; pilot-symbol-aided method; turbo iterative decoding; Channel estimation; Feedback; Intersymbol interference; Iterative algorithms; Iterative decoding; MIMO; OFDM; Receiving antennas; Transmitting antennas; Turbo codes; EM algorithm; MIMO-OFDM; Turbo iterative decoding; channel estimation;
Conference_Titel :
Communication Software and Networks, 2009. ICCSN '09. International Conference on
Conference_Location :
Macau
Print_ISBN :
978-0-7695-3522-7
DOI :
10.1109/ICCSN.2009.61
