Title :
Channel re-estimation in OFDM systems with constellation rotation
Author :
Trifonov, P. ; Zirwas, W.
Author_Institution :
St.-Petersburg State Polytech. Univ., St. Petersburg
Abstract :
The problem of channel estimation in MIMO-OFDM systems with multi-channel ARQ is considered. It is shown that one can improve the accuracy of channel estimates by re-using correctly decoded data. Constellation rotation method is proposed to improve the accuracy of channel estimates.
Keywords :
OFDM modulation; automatic repeat request; channel estimation; MIMO-OFDM systems; channel re-estimation; constellation rotation method; multi-channel ARQ; AWGN; Automatic repeat request; Channel estimation; MIMO; Maximum likelihood decoding; OFDM; Protocols; Receiving antennas; State estimation; Transmitters;
Conference_Titel :
Radio and Wireless Symposium, 2009. RWS '09. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2698-0
Electronic_ISBN :
978-1-4244-2699-7
DOI :
10.1109/RWS.2009.4957310
