Title :
Generalized semi-blind channel estimator for TCM-OFDM system
Author :
Ho, Ka-yau ; Leung, Shu-hung
Author_Institution :
Dept. of Electron. Eng., Hong Kong City Univ.
Abstract :
A generalized semi-blind channel estimator for OFDM using PSK signaling was proposed by the authors. It gives a significant performance gain over pilot-aided channel estimators and other semi-blind method. However, this algorithm does not work satisfactorily for the signaling of non-constant modulus. In this paper, we modify the algorithm to make it applicable to TCM-OFDM systems with biased-PSK-subset partitioning. The TCM-OFDM with 16-QAM is used for performance evaluation. Simulation results show that the generalized semi-blind channel estimation gives a significant gain over pilot-aided channel estimator and its PSK counterpart
Keywords :
OFDM modulation; channel estimation; phase shift keying; quadrature amplitude modulation; trellis coded modulation; PSK signaling; TCM-OFDM system; generalized semi-blind channel estimator; pilot-aided channel estimators; trellis coded modulation; Channel estimation; Constellation diagram; Degradation; Fading; Maximum likelihood decoding; Maximum likelihood estimation; OFDM; Performance gain; Phase shift keying; Statistics;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692554
