Summary: Power Control Algorithms in Wireless
Communications
Judd Rohwer # , Chaouki T. Abdallah + , Aly El­Osery #
1 Abstract
This paper presents a comprehensive review of the published algorithms on
power control for cellular systems. The majority of the research is focused on
Code Division Multiple Access (CDMA) systems, although a small fraction of
the reviewed literature pertains to Frequency Division Multiple Access (FDMA)
and Time Division Multiple Access (TDMA).
2 Introduction
Power control in cellular systems is applied to numerous communication archi­
tectures. For Frequency Division Multiple Access (FDMA) and Time Division
Multiple Access (TDMA) power control reduces intercell interference and im­
proves capacity.
For Code Division Multiple Access (CDMA) power control is a required part
of the base station and mobile station designs. Power Control reduces interfer­
ence due to multiple users in the same frequency band. A general term that
characterizes this type of multiple access interference is the ``near­far e#ect''.
Due to propagation characteristics the signals from mobiles closer to the base
station could overpower the signals from mobiles located farther away. With

Source: Abdallah, Chaouki T- Electrical and Computer Engineering Department, University of New Mexico

Collections: Engineering