Title :
Effects of multipath and base-station antenna arrays on uplink capacity of cellular CDMA
Author :
Naguib, Ayman F. ; Paulraj, Arogyaswami
Author_Institution :
Inf. Syst. Lab., Stanford Univ., CA, USA
fDate :
28 Nov- 2 Dec 1994
Abstract :
We evaluate the uplink capacity of a DS-CDMA cellular system using DPSK modulation with antenna array at base-station. A 2D-RAKE receiver structure with predetection equal gain combining is used for demodulation. We study both the outage and blocking probabilities of the system as a function of the cell loading and the number of array elements. Assuming perfect instantaneous power control and considering the effects of shadowing, multipath fading, path loss, and voice activity, we evaluate the system capacity in terms of the number of users per cell. Simulation results are also presented
Keywords :
antenna arrays; cellular radio; channel capacity; code division multiple access; demodulation; differential phase shift keying; fading; land mobile radio; multipath channels; power control; probability; pseudonoise codes; radio links; radio receivers; spread spectrum communication; telecommunication control; 2D-RAKE receiver; CDMA cellular system; DPSK modulation; DS-CDMA; array elements; base-station antenna arrays; blocking probability; cell loading; demodulation; instantaneous power control; multipath fading; outage probability; path loss; predetection equal gain combining; shadowing; simulation results; system capacity; uplink capacity; voice activity; Antenna arrays; Differential quadrature phase shift keying; Diversity reception; Fading; Frequency; Multiaccess communication; RAKE receivers; Receiving antennas; System performance; Time division multiple access;
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
DOI :
10.1109/GLOCOM.1994.513551
