Efficient Iterative Detection Technique in Wireless Communication System

Recently, among the MIMO-OFDM detection techniques, a lot of papers suggested V-BLAST scheme which can achieve high data rate. Therefore, the signal detection of MIMO-OFDM system is important issue. In this paper, efficient iterative V-BLAST detection technique is proposed in wireless communication system. The proposed scheme adjusts the number of candidate symbol and iterative scheme based on channel state. According to the simulation result, the proposed scheme has better BER performance than conventional schemes and similar BER performance of the QRD-M with iterative scheme. Moreover complexity of proposed scheme has 50.6% less than complexity of QRD-M detection with iterative scheme. Therefore the proposed detection scheme can be efficiently used in wireless communication.

• Hwan-Jun Choi
• Sung-Bok Choi
• Hyoung-Kyu Song

• MIMO-OFDM
• V-BLAST
• QR-decomposition
• QRD-M
• DFE
• Iterative scheme
• Channel condition.

[1] G. J. Foschini, "Layered space-time architecture for wireless communication in a fading environment using multi-element antennas,” Bell Labs Tech J., vol. 1, no.2, pp 41–59, 1996.
[2] P.W. Wolniansky, G.J. Foschini, G.D Golden and R.A. Valenzuela, "V-BLAST: An architecture for realizing very high data rates over the rich-scattering wireless channel,” in Proc. ISSSE’98, pp 295–300, 1998.
[3] A. Benjebbour, H. Murata, and S. Yoshida, "Performance of iterative successive detection algorithm with space-time transmission,” IEEE Vehicular Technology Conference VTC 2001 Spring, vol. 2,pp1287–1291, 2001.
[4] D. Li, L. Cai and H. Yang, "New iterative detection algorithm for V-BLAST,” in Proc. VTC’04, vol. 4,pp2444–2448, 2004.
[5] M. -S. Baek, Y. -H. You and H. -K. Song,"Combined QRD-M and DFE detection technique for simple and efficient signal detection in MIMO-OFDM systems,” IEEE Trans. Wireless Communication, vol. 8, no.4, pp1632–1638, 2009.
[6] J. -K. Ahn, S. -J. Yu and H. -K. Song, "Channel Condition Number Based Switching Detection Scheme in MIMO-OFDM System,” IEICE Trans. Fundamentals, vol. E96-A, no.1, pp387–390, 2013.