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

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 in...

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Veröffentlicht in:IEEE transactions on communications 1993-11, Vol.41 (11), p.1626-1634
Hauptverfasser: Ariyavisitakul, S., Li Fung Chang
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Li Fung Chang
description 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.< >
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subjects Applied sciences
Base stations
Error correction
Exact sciences and technology
Fading
Feedback
Interference
Multiaccess communication
Power control
Power system modeling
Radio link
Radiocommunication specific techniques
Radiocommunications
Statistics
Telecommunications
Telecommunications and information theory
title Signal and interference statistics of a CDMA system with feedback power control
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