Title :
A successive interference cancellation scheme for an ODFM system
Author :
Leung, Edward ; Ho, Paul
Author_Institution :
Sch. of Eng. Sci., Simon Fraser Univ., Burnaby, BC, Canada
Abstract :
We consider an orthogonal frequency division multiplexing (OFDM) system with successive interference cancellation to reduce interchannel interference. The system operates in a Rayleigh frequency selective channel and pilot symbols are inserted in each OFDM frame for the purpose of channel estimation. Interchannel interference (ICI) is caused by the time variations in the channel gain within one OFDM frame. The ICI leads to an error floor, which is a function of the Doppler frequency. It was found that by performing successive interference cancellation at the receiver, we were able to significantly reduce the error floor caused by ICI. Furthermore, we introduce a simple channel estimator based on pilot symbols to estimate the multipath fading channel information required to perform the SIC
Keywords :
Rayleigh channels; adjacent channel interference; error statistics; fading; frequency division multiplexing; interference suppression; multipath channels; parameter estimation; quadrature phase shift keying; Doppler frequency; ODFM system; OFDM frame; QPSK; Rayleigh frequency selective channel; channel estimation; channel gain; error floor; interchannel interference; interchannel interference reduction; multipath fading channel; orthogonal frequency division multiplexing; pilot symbols; receiver; successive interference cancellation; time variations; Channel estimation; Delay effects; Delay estimation; Discrete Fourier transforms; Fading; Frequency estimation; Interchannel interference; Interference cancellation; OFDM; Silicon carbide;
Conference_Titel :
Communications, 1998. ICC 98. Conference Record. 1998 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-4788-9
DOI :
10.1109/ICC.1998.682876
