Summary: IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 49, NO. 8, AUGUST 2001 1415
Optimization of Power Control Parameters for
DS-CDMA Cellular Systems
Andrea Abrardo, Member, IEEE, Giovanni Giambene, Member, IEEE, and David Sennati, Member, IEEE
Abstract--This paper envisages a cellular system based on
code-division multiple access and investigates the performance of a
strength-based closed-loop power control (CLPC) scheme on the
basis of different parameters, such as the number of bits of the
power command, the quantization step size, and the user speed.
On the basis of a log-linear CLPC model, an analytical approach
has been developed that has allowed to determine the optimum
quantization step size to be used for each value of the number
of power command bits. Simulation results have permitted to
support the analytical framework developed in this paper.
Index Terms--Code-division multiple access, mobile radio sys-
tems, power control, third-generation mobile systems.
DIRECT-SEQUENCE code-division multiple access
(DS-CDMA) is the dominant air interface solution in
the global IMT-2000 (International Mobile Telecommuni-