Title :
Low-complexity sphere decoding for detection of OFDM systems in doubly-selective fading channels
Author :
Liang, Yun ; Zhang, Qi ; Liu, Zhe ; Shu, Frank ; Berber, Stevan
Author_Institution :
Dept. of Electron. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
A low-complexity detection scheme consisting of a sphere decoder and a parallel interference cancellation (PIC) equaliser is proposed for OFDM systems in doubly-selective fading channels. Theoretical analysis and simulation results show that this detection scheme substantially improves the symbol error rate performance of OFDM systems compared with the traditional PIC equaliser while requiring lower complexity at moderate and high signal-to-noise ratios.
Keywords :
OFDM modulation; decoding; equalisers; error statistics; fading channels; interference suppression; modulation coding; radiofrequency interference; signal detection; OFDM system; PIC equaliser; doubly-selective fading channel; low-complexity detection scheme; parallel interference cancellation; sphere decoder; symbol error rate;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.0158
