Paper Info
Title
Transmit Diversity for Down-Link MC-CDMA Based on Energy Spreading Transform
Abstract
In this paper, we investigate transmit diversity for MC-CDMA down-link mobile communications. We apply recently developed energy spreading transform (EST) in MC-CDMA systems to pick up diversity in frequency-selective wireless channels and to improve signal detection performance. It is shown by computer simulation that the required Eb/No's for a 10-2 bit-error-rate (BER) are improved by about 5 dB for both an indoor channel and an urban channel compared with a MC-CDMA system without an EST. For a system with two transmit antennas and Alamouti's code, the required Eb/No for an EST based MC-CDMA system is improved by 2.7 dB for an indoor channel and 3.3 dB for an outdoor channel compared with a MC-CDMA system without an EST. For a system with multiple transmit antennas, symbol shuffling scheme, together with an EST, has been proposed for transmit diversity. Even though symbol shuffling scheme alone is not as good as Alamouti's code, it can be combined with Alamouti's code to reach matched filter bound (MFB) for systems with over four transmit antennas. Comparison of our transmit-diversity approach with the widely used MMSE detection for MC-CDMA systems is also provided.
Year
DOI
Venue
2007
10.1109/WCNC.2007.118
WCNC
Keywords
Field
DocType
symbol shuffling scheme,mc-cdma down-link,diversity reception,transmit antennas,transmitting antennas,indoor channel,signal detection performance,bit-error-rate,mc-cdma down-link mobile communications,symbol shuffling,frequency-selective wireless channels,urban channel,transmitter diversity,energy spreading transform,wireless channels,matched filter bound,alamouti code,code division multiple access,alamouti's code,transforms,error statistics,signal detection,transmit diversity,intersymbol interference,computer simulation,transmitters,bit error rate,ofdm,fading,mobile communication
Intersymbol interference,Telecommunications,Fading,Computer science,Communication channel,Real-time computing,Electronic engineering,Matched filter,Code division multiple access,Orthogonal frequency-division multiplexing,Transmit diversity,Bit error rate
Conference
Volume
Issue
ISSN
null
null
1525-3511 E-ISBN : 1-4244-0659-5
ISBN
Citations 
PageRank 
1-4244-0659-5
0
0.34
References 
Authors
6
2
Name
Order
Citations
PageRank
Taewon Hwang139931.78
Geoffrey Ye Li293799.10