Title :
Application of sphere decoding in intercarrier-interference reduction for OFDM systems
Author :
Kou, Y.J. ; Lu, W.-S. ; Antoniou, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
While fast variations of wireless channel characteristics cause intercarrier interference (ICI) in orthogonal frequency-division multiplexing systems, they also introduce frequency diversity, which can be exploited to improve the demodulation performance. An ICl-reduction algorithm is proposed based on a sphere decoding (SD) algorithm. By considering channel information, a new search strategy is developed to reduce the computational complexity of the SD algorithm. Design examples are presented which demonstrate that the proposed algorithm outperforms several existing algorithms in terms of BER performance.
Keywords :
OFDM modulation; channel coding; decoding; radiofrequency interference; wireless channels; OFDM systems; frequency diversity; intercarrier interference; intercarrier-interference reduction; orthogonal frequency-division multiplexing systems; sphere decoding algorithm; wireless channel; Decoding; OFDM;
Conference_Titel :
Communications, Computers and signal Processing, 2005. PACRIM. 2005 IEEE Pacific Rim Conference on
Print_ISBN :
0-7803-9195-0
DOI :
10.1109/PACRIM.2005.1517300