An Improved Lattice Reduction Aided Detection Scheme for MIMO-OFDM System

This paper proposes an efficient lattice-reduction-aided detection (LRD) scheme to improve the detection performance of MIMO-OFDM system. In this proposed scheme, V candidate symbols are considered at the first layer, and V probable streams are detected with LRD scheme according to the first detected V candidate symbols. Then, the most probable stream is selected through a ML test. Since the proposed scheme can more accurately detect initial symbol and can reduce transmission of error to rest symbols, the proposed scheme shows more improved performance than conventional LRD with very low complexity.

Authors:

• Jang-Kyun Ahn
• Seung-Jun Yu
• Eui-Young Lee
• Hyoung-Kyu Song

Keywords:

• Lattice reduction aided detection
• MIMO-OFDM
• QRD-M
• V-BLAST.

References:

[1] P. W. Wolniansky, G. J. Foschini, G. D. Golden and R. A. Valenzuela. "VBLAST:
An architecture for realizing very high data rates over the richscattering
wireless channel," Proc. ISSSE-98, pp. 295-300. Sept. 1998.
[2] M.-S. Baek, S.-Y. Yeo, Y.-H. You and H.-K. Song, "Low complexity ML
detection technique for V-BLAST systems with DFE decoding," IEICE
Trans. Commun, Vol. E91-B(1), pp. 1261-1265, Jan. 2008.
[3] K.-J. KIM, J. Yue, R. A. Iltis and J. D. Gibson, "A QRD-M/Kalman
filter-based detection and channel estimation algorithm for MIMO-OFDM
Systems," IEEE Trans. Wireless Commun, Vol. 4, No. 2, pp. 710-721,
Mar. 2005.
[4] Yu-Jin Song, Hyoung-Kyu Song, "Low complexity QRD-M algorithm
based on LR-aided decoding for MIMO-OFDM systems," Proc. IEEE
PIMRC, pp. 299-303. Sep. 2010.
[5] Berenguer. I, Adeane. J, Wassell. I.J., and Wang. X, "Lattice-reductionaided
receiver for MIMO-OFDM in spatial multiplexing systems," Proc.
IEEE GLOBECOM, Nov. 2005.
[6] Y. H. Gan and H. W. Mow, "Complex lattice reduction algorithm for lowcomplexity
MIMO detection," Proc. IEEE PIMRC, Vol. 2, pp. 1516-1521.
Sep. 2004.
[7] C. Windpassinger and R. F. H. Fischer, "Low-complexity near maximumlikelihood
detection and precoding for MIMO systems using lattice
reduction," Proc. IEEE Information Theory Workshop, Mar. 2003.