Title :
Power control and rate allocation in multirate wideband CDMA systems
Author :
Mark, Jon W. ; Zhu, Shihua
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
As a multiple access technology, DS-CDMA operates in an interference limited environment so the system capacity is dominated by multiple access interference (MAI). Since MAI is proportional to the transmit power strengths of other users, the level of transmit power by all participating users requires careful planning and control in order to attain maximum system capacity. The power distribution under a multirate wideband CDMA environment is investigated. It is shown that power control is a function of the spread bandwidth, user data rates, and the user QoS requirements. A power control algorithm, based on a convergence criterion, is proposed. Numerical results which demonstrate the viability of the power control algorithm are presented
Keywords :
broadband networks; code division multiple access; convergence of numerical methods; land mobile radio; multiuser channels; power control; quality of service; radio networks; radiofrequency interference; spread spectrum communication; telecommunication congestion control; telecommunication control; DS-CDMA; call admission algorithm; convergence criterion; interference limited environment; maximum system capacity; multiple access interference; multiple access technology; multirate wideband CDMA systems; power control algorithm; power distribution; rate allocation; spread bandwidth; system capacity; third generation systems; transmit power strength; user QoS requirements; user data rates; Bandwidth; Capacity planning; Control systems; Multiaccess communication; Multiple access interference; Power control; Power distribution; Power system planning; Proportional control; Wideband;
Conference_Titel :
Wireless Communications and Networking Confernce, 2000. WCNC. 2000 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6596-8
DOI :
10.1109/WCNC.2000.904621
