Akademik Veri Yönetim Sistemi
Advances in Electronics and Telecommunications, cilt.2, ss.63-67, 2011 (Hakemli Dergi)
This paper discusses the performance of antenna
selection technique in space time turbo coded MIMO-OFDM
systems. Multiple-input multiple-output (MIMO) technology can
either increase the data rate through spatial multiplexing or
improve the reliability through diversity. Space-time turbo codes
(STTC) have been proposed to provide robust communications in
MIMO wireless environment. STTC technique incorporates the
methods of transmitter diversity and channel coding to provide
significant reduction of error rates over the traditional communication
systems. The orthogonal frequency division multiplexing
(OFDM) is a modulation method designed to mitigate multipath
distortion and frequency selectivity of wireless channels at high
data-rate transmissions. The MIMO-OFDM technology supports
the advantages of both the MIMO system and the OFDM
technique. In practice, a major impediment in MIMO-OFDM
technology is the cost of hardware, because every antenna element
requires a complete radio frequency (RF) chain to transmit signal
over that element. In many (size and power constrained) mobile
applications, it is desirable to have less RF units in multiple
antenna systems which can be possible with antenna selection
technique. In this paper, joint transmit and receive antenna
selection for a space-time turbo coded MIMO-OFDM system
is investigated. As the selection criterion, maximization of signal
to noise ratio at the receiver is used for per-tone and all-tone
selection methods. The simulation results show that the studied
system improves performance by achieving significant diversity
gains which makes it attractive for the next generation wireless
standards.