Title :
A high efficiency channel estimation and equalisation strategy for a broadband COFDM system
Author :
Ormondroyd, R.F. ; Al-Susa, E.A.
Author_Institution :
Commun. & Wireless Networks Res. Group., Cranfield Univ., Swindon, UK
fDate :
29 Sep-2 Oct 1998
Abstract :
COFDM is a channel coding and modulation scheme that mitigates the adverse effects of time-varying, frequency-selective fading by using multi-carrier modulation combined with time- and frequency-domain interleaving and forward error correcting coding (FEC). COFDM effectively transforms the time-domain equalisation problem of conventional single carrier systems into the frequency domain. This paper examines the performance of an efficient feedback channel estimation and equalisation algorithm for a 25 Mb/s COFDM-QAM system in a frequency-selective multipath channel. In particular, the effect of the COFDM block length relative to the coherence time of the channel is discussed
Keywords :
OFDM modulation; channel coding; decision feedback equalisers; fading channels; forward error correction; frequency-domain analysis; multipath channels; quadrature amplitude modulation; time-domain analysis; 25 Mbit/s; QAM system; broadband COFDM system; channel coding; equalisation; feedback channel estimation; forward error correcting coding; frequency-domain interleaving; frequency-selective multipath channel; high efficiency channel estimation; multi-carrier modulation; time-domain interleaving; Channel coding; Channel estimation; Error correction; Fading; Feedback; Forward error correction; Frequency domain analysis; Interleaved codes; Modulation coding; Time domain analysis;
Conference_Titel :
Signals, Systems, and Electronics, 1998. ISSSE 98. 1998 URSI International Symposium on
Conference_Location :
Pisa
Print_ISBN :
0-7803-4900-8
DOI :
10.1109/ISSSE.1998.738118
