Title :
Advanced CDMA transmission concepts for 3G and 4G mobile radio communications
Author :
Baier, Paul Walter ; Meurer, Michael
Author_Institution :
Kaiserslautern Univ., Germany
fDate :
30 Aug.-2 Sept. 2004
Abstract :
CDMA techniques are widely used in 3G mobile radio systems, and this can be also expected for the fourth generation of mobile radio communications. CDMA offers the advantages of frequency diversity, interferer diversity and flexibility. Unfortunately, these advantages go along with the problem of signal separation typical of CDMA, which hampers spectral efficiency and capacity. In the paper some possibilities to mitigate this problem and to thus enhance CDMA performance are shown. These possibilities include CDMA signal separation based on the turbo principle, the application of multi-element antennas at the base stations in combination with nonlinear signal processing, and an alternative to conventional cellular structures exploiting the spatial separation of the mobile terminals.
Keywords :
3G mobile communication; 4G mobile communication; cellular radio; code division multiple access; source separation; 3G mobile radio communications; 4G mobile radio communications; CDMA techniques; cellular radio; frequency diversity; interferer diversity; multi-element antennas; nonlinear signal processing; signal separation; spectral efficiency; turbo principle; Bandwidth; Frequency diversity; Frequency division multiaccess; Land mobile radio; Mobile communication; Multiaccess communication; Multiple access interference; Source separation; Spread spectrum communication; Wideband;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2004 IEEE Eighth International Symposium on
Print_ISBN :
0-7803-8408-3
DOI :
10.1109/ISSSTA.2004.1371771
