Title :
Reducing capture effects in despread-respread multi-target adaptive arrays in CDMA systems
Author :
Cavalcanti, Francisco R P ; Romano, Joao M T
Author_Institution :
Electr. Eng. Dept., Fed. Univ. of Ceara, Brazil
fDate :
6/21/1905 12:00:00 AM
Abstract :
Despread-respread multi-target adaptive antenna arrays (DRMTAAs) have been proposed for reliable signal recovery and capacity enhancements in the reverse link of DS-CDMA systems. We consider possible capture effects in these devices. We show by simulation that, in some cases, capture effects cannot be neglected in DRMTAAs. We then propose the use of an auxiliary multiuser detection technique in conjunction with the antenna array so as to reduce such effects. Simulation results confirm the expected benefits
Keywords :
adaptive antenna arrays; array signal processing; code division multiple access; fading channels; land mobile radio; linear antenna arrays; multiuser channels; radio links; signal detection; spread spectrum communication; DRMTAA; DS-CDMA systems; adaptive algorithms; auxiliary multiuser detection; capacity enhancements; capture effects reduction; despread-respread multi-target adaptive arrays; fading channel; reliable signal recovery; reverse link; simulation results; uniform linear antenna array; AWGN; Adaptive arrays; Additive white noise; Base stations; Baseband; Frequency; Gaussian channels; Gaussian noise; Multiaccess communication; Signal processing;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Conference_Location :
Rio de Janeireo
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.827577
