Title :
Effect of transmitter power control imperfections on capacity in DS/CDMA cellular mobile radios
Author :
Kudoh, Eisuke ; Matsumoto, Tadashi
Author_Institution :
NTT Radio Commun. Syst. Labs., Kanagawa, Japan
Abstract :
Three imperfections commonly found in transmitter power control (TPC) for direct sequence code division multiple access (DS/CDMA) cellular mobile radios, faulty control of transmission power, unavailable site diversity, and nonuniform user distribution, are investigated. The effects of these TPC imperfections on the traffic capacity of the DS/CDMA mobile communications systems were evaluated through computer simulations. Also, for the TPC system, the accuracy with which the average received signal power must be measured is examined under a wideband signal transmission environment. It is shown that 90% of the traffic capacity with perfect TPC can be achieved by using received signal power measurement whose time interval is larger than eight times the inverse of the maximum Doppler frequency
Keywords :
cellular radio; channel capacity; code division multiple access; power control; spread spectrum communication; telecommunications control; DS/CDMA; average received signal power; cellular radio; computer simulations; direct sequence code division multiple access; maximum Doppler frequency; traffic capacity; transmitter power control; wideband signal transmission; Communication system control; Communication system traffic control; Direct-sequence code-division multiple access; Land mobile radio; Multiaccess communication; Power control; Power measurement; Radio control; Radio transmitters; Traffic control;
Conference_Titel :
Communications, 1992. ICC '92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications., IEEE International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-0599-X
DOI :
10.1109/ICC.1992.268256
