Space-time coding over a code division multiple access system

Author

Tehrani, Ardavan Maleki ; Negi, Rohit ; Cioffi, John

Author_Institution

Dept. of Electr. Eng., Stanford Univ., CA, USA

fYear

1999

fDate

1999

Firstpage

134

Abstract

We discuss the usage of space-time coding with multi-antenna transmission for a DS/CDMA system. We have considered an L-multipath, M-mobile antenna system in which the base station has a phased N-antenna array (i.e. fading at the base station antennas is completely correlated). We have shown that for the considered DS/CDMA system, for the channel with no ISI, adaptive antennas, with optimized transmit vector, can be combined with space-time coding (e.g. delay-diversity coding) to achieve a diversity gain of ML and a large coding gain whenever N⩾L

Keywords

MIMO systems; adaptive antenna arrays; array signal processing; channel coding; code division multiple access; delays; diversity reception; fading channels; land mobile radio; mobile antennas; multipath channels; multiuser channels; spread spectrum communication; DS/CDMA system; MIMO CDMA system; base station; base station antennas; code division multiple access system; coding gain; correlated fading; delay-diversity coding; diversity gain; downlink system model; mobile antenna system; multi-antenna transmission; optimized transmit vector; optimum transmit filter; phased antenna array; receiver structure; space-time coding; transmit optimization problem; transmitter structure; Adaptive arrays; Antenna arrays; Base stations; Delay; Diversity methods; Fading; Intersymbol interference; Multiaccess communication; Phased arrays; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE

Conference_Location

New Orleans, LA

ISSN

1525-3511

Print_ISBN

0-7803-5668-3

Type

conf

DOI

10.1109/WCNC.1999.797801

Filename

797801