Title :
Stability upper bounds for reverse link power control of CDMA systems
Author :
Kim, Jong-hyune ; Huang, Garng M. ; Georghiades, Costas N.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
The capacity of CDMA (code-division multiple access) systems is limited by its other-user interference because all users in a cell share the same frequency band. To achieve maximum capacity, the `near-far´ problem needs to be dealt with. In practice, this is done through appropriate power control. Due to the interaction between the power control process, CDMA systems may become unstable if the desired SNR is not set appropriately. When CDMA systems are stable, the received power at the base station converges to the optimal power with a desired SNR (signal-to-noise ratio) setting. We analyze the associated power and the interference estimation in the discrete time domain and find the stability SNR upper bounds that can guarantee the system stability
Keywords :
cellular radio; channel capacity; code division multiple access; multiuser channels; noise; power control; radio links; radio networks; radiofrequency interference; stability; telecommunication control; time-domain analysis; CDMA systems; QoS; base station; channel models; code-division multiple access; discrete time domain; frequency band sharing; interference estimation; maximum capacity; mobile radio networks; near-far problem; optimal power; other-user interference; received power; reverse link power control; signal-to-noise ratio; stability SNR upper bounds; system stability guarantee; Base stations; Control systems; Frequency; Interference; Multiaccess communication; Power control; Rayleigh channels; Stability analysis; Telecommunication control; Time domain analysis;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778430
