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Adaptive spatial mode of space-time and spacefrequency OFDM system over fading channels

Noordin, Nor K. and M. Ali, Borhanuddin and Jamuar, S. S. and A. Rahman, Tharek and Ismail, Mahamod (2006) Adaptive spatial mode of space-time and spacefrequency OFDM system over fading channels. Jurnal Teknologi D (45D). pp. 59-76. ISSN 0127-9696

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Official URL: http://www.penerbit.utm.my/onlinejournal/45/D/JTDi...

Abstract

In this paper we present a 2 transmit 1 receive (1 Tx : 1 Rx) adaptive spatial mode (ASM) of space-time (ST) and space-frequency (SF) orthogonal frequency division multiplexing (OFDM). At low signal to noise ratio (SNR) we employ ST-OFDM and switch to SF-OFDM at a certain SNR threshold. We determine this threshold from the intersection of individual performance curves. Results show a gain of 9 dB (at a bit error rate of 10-3) is achieved by employing adaptive spatial mode compared to a fixed ST-OFDM, almost 6 dB to fixed SF-OFDM, 4 dB to Coded ST-OFDM and 2 dB to a fixed coded SF-OFDM, at a delay spread of 700 ns.

Item Type:Article
Uncontrolled Keywords:OFDM, space-time, space-frequency, channel coding and multipath fading channels
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:4109
Deposited By: Pn Norhayati Abu Ruddin
Deposited On:30 Jul 2007 02:39
Last Modified:15 Oct 2010 02:03

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