Title :
CDMA reverse link spatial combining gains: optimal vs. MRC in a faded voice-data system having a single dominant high data user
Author :
Burke, Joseph P. ; Zeidler, James R.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
The per user carrier-to-interference ratio (CINR) enhancement in the reverse link (mobile to base station) of a CDMA communications system is analyzed using different antenna array spatial combining algorithms: optimum combining (OC) versus maximal ratio combining (MRC) in a multi-rate (combined voice and data users) multi-antenna scenario. Many low data voice users and a single dominant high data user are used to achieve a high degree of colored spatial interference in the analysis. The ratio of the CINR for OC versus MRC is directly analyzed, ie, Z=CINROC/CINRMRC instead of separate analysis of each CINR term: CINROC and CINRMRC with later comparison. Exact solutions are derived for the statistics of a per user CINROC/CINIRMRC improvement, as a function of the high-level interference power to background noise, and is compared with CDMA reverse link Monte Carlo simulations
Keywords :
antenna arrays; code division multiple access; fading channels; integrated voice/data communication; interference suppression; mobile radio; optimisation; CDMA communications system; CINR; MRC; OC; antenna array spatial combining; carrier-to-interference ratio; data voice users; maximal ratio combining; mobile to base station link; multi-antenna system; multi-rate users; optimum combining; reverse link; spatial interference; statistics; Algorithm design and analysis; Antenna arrays; Background noise; Base stations; Diversity reception; Interference; Mobile antennas; Multiaccess communication; Speech analysis; Statistics;
Conference_Titel :
Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-7206-9
DOI :
10.1109/GLOCOM.2001.965120
