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

fYear

1998

fDate

29 Sep-2 Oct 1998

Firstpage

471

Lastpage

475

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems, and Electronics, 1998. ISSSE 98. 1998 URSI International Symposium on

Conference_Location

Pisa

Print_ISBN

0-7803-4900-8

Type

conf

DOI

10.1109/ISSSE.1998.738118

Filename

738118