Frequency overlay of GSM and cellular B-CDMA

Author

Koorevaar, Perry ; Ruprecht, Jürg

Author_Institution

KPN Res., Leidachendam, Netherlands

Volume

2

fYear

1996

fDate

22-25 Sep 1996

Firstpage

497

Abstract

The maximum capacity gain on top of the GSM uplink due to a cellular broadband DS-CDMA overlay is estimated. It is assumed that the base stations of both systems are unilocated and that the power control in both systems is perfect. Furthermore, in the CDMA transmitters and receivers, ideal notch filtering is assumed around the occupied GSM frequencies of the same cell. Using geometrical arguments and a standard propagation model, all relevant contributions to the carrier-to-interference ratios (CIR) for the uplinks of the GSM and CDMA systems are numerically evaluated. Adapting standard limits for the CIRs, the capacity on the uplink can be increased by a factor of 4.8. However, the more critical down-link, whose derivation is more complicated and not presented in this paper, limits the overall capacity for the same assumptions to 3.3

Keywords

broadband networks; cellular radio; channel capacity; code division multiple access; interference suppression; land mobile radio; power control; pseudonoise codes; radio links; radio networks; radio receivers; radio transmitters; radiofrequency interference; spread spectrum communication; telecommunication control; CDMA receivers; CDMA transmitters; GSM frequencies; base stations; carrier-to-interference ratios; cellular B-CDMA; cellular broadband DS-CDMA overlay; frequency overlay; geometrical arguments; ideal notch filtering; interference reduction; maximum capacity gain; perfect control; standard propagation mode; uplink capacity; Bandwidth; Frequency; GSM; Interference; Iron; Mobile communication; Multiaccess communication; Narrowband; Research and development; Telecommunications;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on

Conference_Location

Mainz

Print_ISBN

0-7803-3567-8

Type

conf

DOI

10.1109/ISSSTA.1996.563177

Filename

563177