Title :
Performance of downlink multicarrier CDMA with space diversity
Author :
Li, Y. ; Georghiades, C.N. ; Huang, G.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
We apply a simple transmit diversity technique to downlink multicarrier CDMA (MC-CDMA) systems. The resulting diversity on each subcarrier improves orthogonality among users which is distorted by the subcarriers´ multipath fading. Accordingly, the diversity suppresses multiuser interference. For equal-gain-combining (EGC) receivers, both theoretical analysis and simulation results show that interference is approximately reduced by half compared to MC-CDMA without space diversity. For the orthogonality-restoring combining (ORC) receiver, simulation results show that it suppresses noise amplification while rejecting multiuser interference
Keywords :
amplification; code division multiple access; diversity reception; fading channels; interference suppression; land mobile radio; multipath channels; multiuser channels; noise; radio links; radio receivers; radiofrequency interference; BER performance; MC-CDMA systems; downlink multicarrier CDMA; equal-gain-combining receivers; multipath fading; multiuser interference rejection; multiuser interference suppression; noise amplification suppression; orthogonality-restoring combining receiver; simulation results; space diversity; subcarrier diversity; transmit diversity; Analytical models; Bandwidth; Diversity reception; Downlink; Fading; Interference suppression; Multiaccess communication; Multicarrier code division multiple access; Performance analysis; Transmitters;
Conference_Titel :
Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-6451-1
DOI :
10.1109/GLOCOM.2000.891266
