Signal and interference statistics of a CDMA system with feedback power control

Author

Ariyavisitakul, Sirikiat ; Chang, Li Fung

Author_Institution

Radio Res. Div., Bellcore, Red Bank, NJ, USA

Volume

41

Issue

11

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

1626

Lastpage

1634

Abstract

Power control is essential in the use of direct-sequence code-division multiple-access (CDMA) techniques over fading radio channels. The paper investigates a feedback power control approach that allows power commands to be updated at a higher rate than the rate of multipath fading. The signal and interference statistics as received at the base stations after power control are obtained for a simulated CDMA system which includes multiple base stations with diversity receivers and a large number of power-controlled users continuously moving at various speeds. The authors show that often-used analyses based on perfect average power control lead to optimistic capacity results (by about 25%) because interference is underestimated by as much as 1 dB

Keywords

code division multiple access; diversity reception; error statistics; fading; feedback; mobile radio systems; power control; radiofrequency interference; telecommunication channels; telecommunications control; CDMA system; base stations; capacity; direct-sequence code-division multiple-access; diversity receivers; fading radio channels; feedback power control; interference statistics; power commands; power-controlled users; signal statistics; Base stations; Error correction; Fading; Feedback; Interference; Multiaccess communication; Power control; Power system modeling; Radio link; Statistics;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.241743

Filename

241743