[KSCI] Korea Science Citation Index Service

An efficient Channel Estimation Technique of OFDM-Base Space-Time Coded Wireless LAN Systems

Kim, Dong-Ok (Information and Korea Information & Communication polytechinic college)

Publication Information

Journal of information and communication convergence engineering / v.2, no.2, 2004 , pp. 61-66 More about this Journal

Abstract

This paper presents a way to maximize transmission efficiency and reception ability through transmission diversity technology, which can be adapted to wireless multimedia Wireless LAN system. The presented method is a comparative analysis between a case where parameter a for time average is 0.3.1 with consideration of channel presumption with two types of rms delayed spread, which is 50nsec. 150nsec, for the performance analysis of STTC (Space-Time Trellis Code) adopting time-space ciphering method appropriate for MIMO channel, and performance in the case where presumed channel value from long training column section is applied to according frame in a single frame. The result showed that BER brought SNR improvement of l.0dB in $10^{-3}$ when a was 0.3 than adopting only the long training column, and showed increase of general performance improvement for the sake of time average rather than the case without.

Keywords

CDMA; adaptive transmission; MIMO; OFDM; WLAN;

Citations & Related Records

Reference

1	Dong-ok KIM 'Efficient clock Synchronization Schemes for Enhancing Error Performance of IEEE 802.11 a Systems,' korea institute ofcommunication sciences Vol. 27, No. lA, pp. 990-996, Dec. 2002
2	T. M. Schmidl and D. C. Cox, 'Robust frequency and timing synchronization for OFDM,' IEEE Trans. Commun., vol. 45, no. 12, June. 1997
3	Floyd M. Gardner, 'Interpolation in digital modemspart ii: Implementation and performance,' IEEE Trans. on Commun, vol. 4 I, no. 6, pp. 998-1008, June. 1993 DOI ScienceOn
4	V. Tarokh, N. Seshadri, and A. R. Calderbank, 'Space-time codes for high data rate wireless communication: Performance analysis and code construction,' IEEE Trans. Inform. Theory, vol. 44, pp.744-765, Mar.1998 DOI ScienceOn
5	A. F. Naguib, N. Seshadri, and A. R. Calderbank, 'Increasing data rate over wireless channels,' IEEE Signat Processing Mag. vol. 17, issue. 3, pp.76-92, May 2000 DOI ScienceOn
6	Loke Kun Tan and Henry Samueli, 'A 200MHz quadrature, digital synthesizer/mixer in 0.8um CMOS,' IEEE J. Solid-State Circuits., vol. 30, no.3, pp. 193-200, Mar. 1995 DOI ScienceOn
7	G. J. Foschini and M. J. Gans, 'On limits of wireless communications[I0] Loke Kun Tan and Henry Samueli,' A 200MHz quadrature digital synthesizer/mixer in 0.8um CMOS,' IEEE J. Solid-State Circuits., vol. 30, no.3, pp. 193-200, Mar. 1995 DOI ScienceOn
8	H.C. Osborne, 'A generalized polarity-type costas loop for tracking mpsk signals,' IEEE Trans. on Commun., vol. COM-30, no.10, pp. 2289-2296, Oct. 1982