Title :
Transmit diversity for combined 2G and 3G CDMA systems
Author :
Buehrer, R.Michael ; Soni, Robert A. ; Benning, Roger D.
Author_Institution :
Mobile & Portable Radio Res. Group, State Univ., Blackburg, VA, USA
Abstract :
In this letter, we propose modifications to existing transmit-diversity techniques to provide transmit diversity in code-division multiple-access cellular systems which must support both second-generation and third-generation mobiles on a common carrier. The proposed method, which we call symmetric-sweep transmit diversity, combines phase-sweep transmit diversity (PSTD) and space-time spreading (STS) in a way that allows second-generation and non-STS-capable mobiles to obtain the full advantage of PSTD, while third-generation mobiles obtain the full advantage of STS.
Keywords :
3G mobile communication; cellular radio; code division multiple access; diversity reception; 2G CDMA system; 3G CDMA system; 3G mobile communication; cellular systems; code-division multiple-access; metric-sweep transmit diversity technique; mobile radio; phase-sweep transmit diversity; space-time spreading; Base stations; Cultural differences; Degradation; Diversity reception; Frequency diversity; Land mobile radio; Multiaccess communication; Rayleigh channels; Sociotechnical systems; Statistics; 211;time spreading; 65; CDMA; Code-division multiple access; PSTD; STS; mobile radio; phase-sweep transmit diversity; space&#; transmit diversity;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2004.836437
