Paper Info
Title
Experiments On Adaptive Antenna Array Transmit Diversity In W-Cdma Forward Link
Abstract
This paper proposes adaptive antenna array transmit diversity (AAA-TD) in the W-CDMA forward link with frequency division duplexing (FDD), based on adaptively-generated receiver antenna weights in the reverse link, which only track the changes in the average signal-to-interference power ratio (SIR) and direction of arrival (DOA) but with the calibration of the phase/amplitude variations of the parallel RF receiver/transmitter circuits corresponding to the number of array antennas. The laboratory and field experimental results exploiting AAA-TD are presented to show the strong multipath interference (MPI) suppression effect especially from high-rate users with large transmission power. Laboratory experiments elucidate that by using AAA-TD with four antennas, the required transmitted SIR. before multiplying the transmitter antenna weights at the average BER of 10(-3) is decreased by approximately 13 dB compared to that with one omni-directional antenna transmitter. Field experiments also show that although an error floor above 10(-2) is observed with one omni-directional antenna. transmitter when the transmitted SIR is -12 dB due to severe MPI, no error floor is observed when employing 4-antenna AAA-TD and the loss of the required received signal power at the average BER. of 10(-3) from the single-user case is suppressed to below approximately 5 dB. Therefore, we show that AAA-TD is very effective in suppressing severe MPI especially from high rate users with large transmission power due to its adaptive main lobe and null steering.
Year
Venue
Keywords
2002
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES
adaptive antenna array, DS-CDMA, mobile radio
DocType
Volume
Issue
Journal
E85A
7
ISSN
Citations 
PageRank 
0916-8508
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Atsushi Harada100.34
Shinya Tanaka200.34
Mamoru Sawahashi321.82
Fumiyuki Adachi4132.31