[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5573/JSTS.2010.10.3.185

VLSI Implementation of Auto-Correlation Architecture for Synchronization of MIMO-OFDM WLAN Systems

Cho, Jong-Min (Samsung Electronics)
Kim, Jin-Sang (Dept. of Electronics and Radio Engineering, Kyung Hee University)
Cho, Won-Kyung (Dept. of Electronics and Radio Engineering, Kyung Hee University)

Publication Information

JSTS:Journal of Semiconductor Technology and Science / v.10, no.3, 2010 , pp. 185-192 More about this Journal

Abstract

This paper presents a hardware-efficient auto-correlation scheme for the synchronization of MIMO-OFDM based wireless local area network (WLAN) systems, such as IEEE 802.11n. Carrier frequency offset (CFO) estimation for the frequency synchronization requires high complexity auto-correlation operations of many training symbols. In order to reduce the hardware complexity of the MIMO-OFDM synchronization, we propose an efficient correlation scheme based on time-multiplexing technique and the use of reduced samples while preserving the performance. Compared to a conventional architecture, the proposed architecture requires only 27% logic gates and 22% power consumption with acceptable BER performance loss.

Keywords

CFO; OFDM; MIMO; VLSI;

Citations & Related Records

Times Cited By SCOPUS : 0

Reference

1	A. V. Zelst and T.C.W. Schenk, “Implementation of a MIMO OFDM-Based Wireless LAN System,” IEEE Trans. Signal Processing, Feb., 2004. DOI ScienceOn
2	Y. Yamanaka and H. Ochi, “Development of Prototype Board for IEEE802.11n and IP Set,” IEEE ICACT 2007.
3	T. Kim and I. Park, “Two-step aprroach for coarse time synchronization and frequency offset estimation for IEEE 802.16d systems,” IEEE Workshop on Signal Processing Systems, Oct., 2007.
4	H. Y. Liu and C.Y. Lee, “A Low-Complexity Synchronizer for OFDM-Based UWB System,” IEEE Trans. Circuits and Systems II: Exp. Briefs, Nov., 2006. DOI ScienceOn
5	A. Troya, K. Maharatna, M. Krstic, E. Grass, U. Jagdhold, and R. Kraemer, “Low-Power VLSI Implementation of the Inner Receiver for OFDMBased WLAN Systems,” IEEE Trans. Circuits and Systems I: Regular paper, Mar., 2008. DOI ScienceOn
6	IEEE P802.11nTM/D2.0, Feb., 2007.
7	Erceg V. et al., “IEEE 802.11 document 03/940r2,” TGn channel models, Jan., 2004.