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Adaptive Spatial Mode of Space-Time and Space-Frequency OFDM System over Fading Channels
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نویسنده
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NOORDIN NOR K. ,ALI BORHANUDDIN M. ,JAMUAR S. S. ,RAHMAN THAREK A. ,ISMAIL MAHAMOD
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منبع
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jurnal teknologi - 2006 - دوره : 45 - شماره : D - صفحه:59 -76
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چکیده
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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.
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کلیدواژه
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OFDM ,space-time ,space-frequency ,channel coding and multipath fading channels.
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آدرس
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Universiti Putra Malaysia, Faculty of Engineering, MALAYSIA, Universiti Putra Malaysia, Faculty of Engineering, MALAYSIA, Universiti Putra Malaysia, Faculty of Engineering, MALAYSIA, Universiti Teknologi Malaysia, Faculty of Electrical Engineering, MALAYSIA, Universiti Kebangsaan Malaysia, Faculty of Engineering, MALAYSIA
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پست الکترونیکی
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nknordin@eng.upm.edu.my
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Authors
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