Improved transmit diversity block coded OFDM systems for highly dispersive channels
Resource
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Journal
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Pages
-
Date Issued
2003-04
Date
2003-04
Author(s)
Chiang, Bing-Hung
Lin, Ding-Bing
Li, Hsueh-Jyh
Wang, Jia-Li
DOI
1090-3038
Abstract
In 2000, King proposed two g/sub 2/-based transmit diversity block coded OFDM (TDBC-OFDM) systems, i.e., space-time block coded (STBC-OFDM) and space-frequency block coded OFDM (SFBC-OFDM). However, he employed the least square (LS) detector, which was designed under the assumption that the channel is static over the duration of a space-time/frequency codeword. Thereupon, STBC-OFDM/SFBC-OFDM suffers from highly time-frequency selectivity of the channel. Recently, Antony recommended three novel detectors for space-time block coding (STBC) to combat the rapid channel variation. In our work, these detectors are applied to improve the original g/sub 2/-based TDBC-OFDM systems. Also, the performances of the improved g/sub 2/-based TDBC-OFDM systems are evaluated by computer simulation. Simulation results have revealed that significant performance improvement can be achieved even when the systems are operated in highly dispersive channels.
Type
journal article
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