DocumentCode :
965073
Title :
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
Link To Document :
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