Title :
Power control in wireless CDMA: performance with cell site antenna arrays
Author :
Naguib, Ayman F.
Author_Institution :
Inf. Syst. Lab., Stanford Univ., CA, USA
Abstract :
To combat the near-far problem, tight power control is essential in the use of direct sequence code division multiple access (DS/CDMA) communication systems. Recently, antenna arrays and adaptive beamforming at base station were proposed for improving system performance. This paper studies the closed loop power control (CLPC) performance with antenna arrays (AA) and adaptive beamforming through a combination of analysis and discrete event simulations. Our results show that with small angle spread, adaptive beamforming with AA has little effect on the CLPC performance. However, with larger angle spread, better performance is obtained due to space diversity
Keywords :
antenna arrays; array signal processing; cellular radio; closed loop systems; code division multiple access; discrete event simulation; diversity reception; land mobile radio; power control; pseudonoise codes; spread spectrum communication; telecommunication control; DS/CDMA systems; adaptive beamforming; base station; cell site antenna arrays; cellular networks; closed loop power control; direct sequence code division multiple access communication systems; discrete event simulations; near-far problem; performance; power control; small angle spread; space diversity; system performance; wireless CDMA; Adaptive arrays; Adaptive control; Antenna arrays; Array signal processing; Base stations; Direct-sequence code-division multiple access; Multiaccess communication; Power control; Programmable control; System performance;
Conference_Titel :
Global Telecommunications Conference, 1995. GLOBECOM '95., IEEE
Print_ISBN :
0-7803-2509-5
DOI :
10.1109/GLOCOM.1995.500356
