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Constant-rate Adaptive Space-time Code Selection Technique for Wireless Communications

Authors:
Dimas Mavares Terán
Rafael Pedro Torres Jimenez
Roberto Antonio Uzcátegui Vargas

Keywords: Space-time coding, adaptive transmission, antenna selection, wireless communications, baseband signal processing.

Abstract:
A constant-rate space-time code selection technique for transmit antenna diversity systems is proposed. The proposed technique selects both the space-time code and the number of transmitter antennas through a comparison of equivalent SISO channels with a set of predetermined threshold levels, using only four bits for feedback. The constant-rate transmission is based in the inclusion of a complementary transmission mode, which is used whenever no equivalent SISO channel's envelope is found to be over the threshold levels. Simulation results show that the proposed technique outperforms other adaptive transmission techniques, while in comparison with its variable-rate counterpart, there is an increase in spectral efficiency with a slight penalty performance. Additionally to a constant-rate transmission, the new techniques makes BER performance almost independent of the relative velocity between the transmitter and the receiver.

Pages: 7 to 11

Copyright: Copyright (c) IARIA, 2011

Publication date: April 17, 2011

Published in: conference

ISSN: 2308-3964

ISBN: 978-1-61208-127-4

Location: Budapest, Hungary

Dates: from April 17, 2011 to April 22, 2011