Title :
Spectral efficiency of a power-controlled CDMA mobile personal communication system
Author :
Gass, John H., Jr. ; Noneaker, Daniel L. ; Pursley, Michael B.
Author_Institution :
Clemson Univ., SC, USA
fDate :
4/1/1996 12:00:00 AM
Abstract :
The spectral efficiency is determined for a direct-sequence code-division multiple-access (CDMA) communications system that employs rapid closed-loop power control on a channel with doubly selective fading. The sensitivity of the spectral efficiency to the chip rate of the direct-sequence waveform and the number of taps in the RAKE receiver is considered. The effectiveness of the power-control method is also examined for different power-control delays, delay spectra, and Doppler spreads. The implications of the results for the design of personal communication systems are discussed
Keywords :
Doppler effect; code division multiple access; delays; fading; land mobile radio; personal communication networks; power control; pseudonoise codes; radio receivers; radio spectrum management; spread spectrum communication; telecommunication control; time-varying channels; Doppler spreads; RAKE receiver; chip rate; delay spectra; design; direct-sequence code-division multiple-access; direct-sequence waveform; doubly selective fading; power-control delays; power-controlled CDMA mobile personal communication system; rapid closed-loop power control; spectral efficiency; Base stations; Delay effects; Delay estimation; Fading; Interference; Multiaccess communication; Personal communication networks; Power control; Spread spectrum communication; Transmitters;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
