Title :
PIC-based iterative SDR detector for OFDM systems in doubly-selective fading channels
Author :
Feng, Shu ; Minn, Hlaing ; Yan, Liang ; Jinhui, Lu
Author_Institution :
Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China
fDate :
1/1/2010 12:00:00 AM
Abstract :
OFDM data detection in doubly-selective fading channels requires high complexity due to intercarrier interferences (ICI). We present a low-complexity receiver consisting of a semidefinite relaxation (SDR) based detector and parallel interference cancellation (PIC). The entire band is divided into clusters of adjacent subcarriers. SDR is applied on each cluster while PIC tackles ICI from other clusters. An upper bound of ICI power is derived and used to omit far-away clusters in performing PIC. Finally, an adaptive detector based on PIC, PIC-based SDR and the snap-shot SNR in channel is proposed to achieve a better tradeoff between complexity and performance.
Keywords :
fading channels; intercarrier interference; maximum likelihood detection; OFDM systems; PIC-based iterative SDR detector; doubly-selective fading channels; intercarrier interferences; maximum likelihood; parallel interference cancellation; semidefinite relaxation; Bit error rate; Detectors; Equalizers; Fading; Interference cancellation; MIMO; OFDM; Quadrature phase shift keying; Signal detection; Upper bound; Maximum likelihood; parallel interference cancellation; semidefinite relaxation, intercarrier interference;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2010.01.090462
