CINR difference analysis of optimal combining versus maximal ratio combining

Author

Burke, J.P. ; Zeidler, J.R. ; Rao, B.D.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of California, San Diego, CA, USA

Volume

4

Issue

1

fYear

2005

Firstpage

1

Lastpage

5

Abstract

The statistical gain differences between two common spatial combining algorithms: optimum combining (OC) and maximal ratio combining (MRC) are analyzed using a gain ratio method. Using the receive carrier-to-interference plus noise ratio (CINR), the gain ratio ClNR_OC /CINR_MRC is evaluated in a flat Rayleigh fading communications system with multiple interferers. Exact analytical solutions are derived for the probability density function (PDF) and the average gain ratio with one interferer. When more than one interferer is present, the PDF of the gain ratio is illustrated using Monte Carlo simulations and its mean value is shown in basic integral form. An upper bound to the gain ratio is derived providing a simple means to determine when OC will exhibit significant gains over MRC.

Keywords

Monte Carlo methods; Rayleigh channels; diversity reception; integral equations; probability; radiofrequency interference; statistical analysis; CINR difference analysis; Monte Carlo simulation; flat Rayliegh fading communication system; gain ratio method; maximal ratio combining; optimal combining; probability density function; receive carrier-to-interference plus noise ratio; spatial combining algorithm; Algorithm design and analysis; Bit error rate; Colored noise; Diversity reception; Fading; Interference; Signal to noise ratio; Speech analysis; Upper bound; Wireless communication;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2004.840241

Filename

1381416