Channel-gain matched macrodiversity in the forward link of CDMA systems

Author

Li, Dongdong ; Khoja, Jaber A. ; Prabhu, Vasant K.

Author_Institution

Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA

Volume

2

fYear

2003

fDate

7-10 Sept. 2003

Firstpage

1370

Abstract

The orthogonality factor was used to simplify the expression of the E_b/N₀ of a mobile station communicating with a single base station in the forward link of CDMA systems. This paper extends the orthogonality factor to express the E_b/N₀ of a mobile station communicating with multiple base stations by using the channel-gain matched combination approach. A simplified expression of the E_b/N₀ is derived by averaging over fast fading and using average orthogonality factor. This new expression of E_b/N₀ simplifies the capacity and outage calculations of the CDMA systems in the forward link. The relationship between the average E_b/N₀ in practical CDMA systems and that obtained using the simplified model is discussed. The analysis shows that averaging over fast fading leads to a conservative evaluation of the CDMA system performance.

Keywords

code division multiple access; diversity reception; mobile communication; radio links; CDMA systems; base station; channel-gain matched macrodiversity; forward link; mobile station; orthogonality factor; Base stations; Data communication; Degradation; Fading; Multiaccess communication; Multipath channels; Performance analysis; Random variables; Signal analysis; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on

Print_ISBN

0-7803-7822-9

Type

conf

DOI

10.1109/PIMRC.2003.1260337

Filename

1260337