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
Official URL: http://www.penerbit.utm.my/onlinejournal/45/D/JTDi...
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.
|Uncontrolled Keywords:||OFDM, space-time, space-frequency, channel coding and multipath fading channels|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering|
|Deposited By:||Pn Norhayati Abu Ruddin|
|Deposited On:||30 Jul 2007 02:39|
|Last Modified:||15 Oct 2010 02:03|
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