Open-loop power control error in cellular CDMA overlay systems

摘要

Adaptive power control has widely been used in DS/CDMA systems tonovercome the so-called “near-far” problem. This papernstudies the adaptive open-loop power control of a cellular CDMA system,nwhich is overlaid in the downlink by a narrowband signal. The effects ofndownlink power allocation schemes to power control error in the presencenof narrowband interference are analyzed. In order to get a minimum powerncontrol error in the CDMA overlay situations, an optimum downlink powernallocation scheme is used, which works well for a wide range of signalnto narrowband interference ratio