Title :
Open-loop power control error in cellular CDMA overlay systems
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ.
fDate :
7/1/2001 12:00:00 AM
Abstract :
Adaptive power control has widely been used in DS/CDMA systems to overcome the so-called “near-far” problem. This paper studies the adaptive open-loop power control of a cellular CDMA system, which is overlaid in the downlink by a narrowband signal. The effects of downlink power allocation schemes to power control error in the presence of narrowband interference are analyzed. In order to get a minimum power control error in the CDMA overlay situations, an optimum downlink power allocation scheme is used, which works well for a wide range of signal to narrowband interference ratio
Keywords :
adaptive control; cellular radio; code division multiple access; error analysis; multiuser channels; power control; radio links; radiofrequency interference; spread spectrum communication; telecommunication control; DS/CDMA systems; adaptive open-loop power control; cellular CDMA overlay systems; minimum power control error; narrowband interference; narrowband signal; near-far problem; open-loop power control error; optimum downlink power allocation; signal to narrowband interference ratio; Adaptive control; Base stations; Downlink; Error correction; Interference suppression; Multiaccess communication; Narrowband; Power control; Power measurement; Programmable control;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
