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

Volume

1

fYear

2001

fDate

2001

Firstpage

264

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=CINR_OC/CINR_MRC instead of separate analysis of each CINR term: CINR_OC and CINR_MRC with later comparison. Exact solutions are derived for the statistics of a per user CINR_OC/CINIR_MRC 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE

Conference_Location

San Antonio, TX

Print_ISBN

0-7803-7206-9

Type

conf

DOI

10.1109/GLOCOM.2001.965120

Filename

965120