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

Volume

9

Issue

1

fYear

2010

fDate

1/1/2010 12:00:00 AM

Firstpage

86

Lastpage

91

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;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2010.01.090462

Filename

5374051