PIC-based iterative SDR detector for OFDM systems in doubly-selective fading channels

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.

[1]  Amir K. Khandani,et al.  A Near-Maximum-Likelihood Decoding Algorithm for MIMO Systems Based on Semi-Definite Programming , 2007, IEEE Transactions on Information Theory.

[2]  Giuseppe Caire,et al.  On maximum-likelihood detection and the search for the closest lattice point , 2003, IEEE Trans. Inf. Theory.

[3]  Björn E. Ottersten,et al.  The Diversity Order of the Semidefinite Relaxation Detector , 2006, IEEE Transactions on Information Theory.

[4]  Ami Wiesel,et al.  Semidefinite relaxation for detection of 16-QAM signaling in MIMO channels , 2005, IEEE Signal Processing Letters.

[5]  Babak Hassibi,et al.  On the sphere-decoding algorithm I. Expected complexity , 2005, IEEE Transactions on Signal Processing.

[6]  Shu Feng,et al.  Channel Estimation and Equalization for OFDM Wireless System with Medium Doppler Spread , 2007, 2007 International Conference on Wireless Communications, Networking and Mobile Computing.

[7]  Emanuele Viterbo,et al.  A universal lattice code decoder for fading channels , 1999, IEEE Trans. Inf. Theory.

[8]  Björn E. Ottersten,et al.  On the complexity of sphere decoding in digital communications , 2005, IEEE Transactions on Signal Processing.

[9]  Hsiao-Chun Wu,et al.  Analysis and characterization of intercarrier and interblock interferences for wireless mobile OFDM systems , 2006, IEEE Transactions on Broadcasting.

[10]  Zhi-Quan Luo,et al.  Quasi-maximum-likelihood multiuser detection using semi-definite relaxation with application to synchronous CDMA , 2002, IEEE Trans. Signal Process..

[11]  Paul H. Moose,et al.  A technique for orthogonal frequency division multiplexing frequency offset correction , 1994, IEEE Trans. Commun..

[12]  Alireza Seyedi,et al.  General ICI self-cancellation scheme for OFDM systems , 2005, IEEE Transactions on Vehicular Technology.

[13]  Per Ola Börjesson,et al.  ML estimation of time and frequency offset in OFDM systems , 1997, IEEE Trans. Signal Process..

[14]  Geert Leus,et al.  Low-Complexity Banded Equalizers for OFDM Systems in Doppler Spread Channels , 2006, EURASIP J. Adv. Signal Process..

[15]  Bor-Sen Chen,et al.  ICI cancellation for OFDM communication systems in time-varying multipath fading channels , 2005, IEEE Trans. Wirel. Commun..

[16]  Philip Schniter,et al.  Low-complexity equalization of OFDM in doubly selective channels , 2004, IEEE Transactions on Signal Processing.

[17]  Y.T. Hou,et al.  On energy provisioning and relay node placement for wireless sensor networks , 2005, IEEE Transactions on Wireless Communications.

[18]  Yong Soo Cho,et al.  An equalization technique for orthogonal frequency-division multiplexing systems in time-variant multipath channels , 1999, IEEE Trans. Commun..

[19]  Geert Leus,et al.  Simple equalization of time-varying channels for OFDM , 2005, IEEE Communications Letters.

[20]  Yang-Seok Choi,et al.  On channel estimation and detection for multicarrier signals in fast and selective Rayleigh fading channels , 2001, IEEE Trans. Commun..

[21]  Andreas F. Molisch,et al.  Iterative Methods for Cancellation of Intercarrier Interference in OFDM Systems , 2007, IEEE Transactions on Vehicular Technology.

[22]  Donald C. Cox,et al.  ICI mitigation for pilot-aided OFDM mobile systems , 2005, IEEE Transactions on Wireless Communications.

[23]  Pak-Chung Ching,et al.  Semidefinite relaxation based multiuser detection for M-ary PSK multiuser systems , 2004, IEEE Trans. Signal Process..

[24]  Marc Moonen,et al.  Time-domain and frequency-domain per-tone equalization for OFDM over doubly selective channels , 2004, Signal Process..

[25]  Heinrich Meyr,et al.  Optimum receiver design for wireless broad-band systems using OFDM. I , 1999, IEEE Trans. Commun..

[26]  Nikos D. Sidiropoulos,et al.  A Semidefinite Relaxation Approach to MIMO Detection for High-Order QAM Constellations , 2006, IEEE Signal Processing Letters.

[27]  Peng Zhou,et al.  MIMO Detection of 16-QAM Signaling Based on Semidefinite Relaxation , 2007, IEEE Signal Processing Letters.