Title :
A novel smart antennas algorithm for 1x EV-DV systems
Author :
Zeqiang, Chen ; Dacheng, Yang
Author_Institution :
Wireless Commun. Center, Beijing Univ. of Posts & Telecommun., China
Abstract :
A novel smart antennas algorithm that named the adaptive feedback smart antennas (AFSA) for cdma2000 1xEV-DV systems is proposed. The algorithm is based on the reverse channel quality indicator channel (R-CQICH) C/I feedback which is measured at the mobile station and the adaptive searching and tracking of the smart antennas at the base station. The smart antennas use the N-LMS adaptive algorithm to get the initial direction of the desired user in the uplink signal processing. The smart antennas search and track the particular subscriber according to the C/I feedback via the R-CQICH in the downlink. The simulation of the algorithm is performed to compare with the analysis. It is shown that the Ec/Io to the desired subscriber can be improved obviously and the intracell interference can be decreased efficiently.
Keywords :
3G mobile communication; adaptive antenna arrays; adaptive signal processing; feedback; least mean squares methods; radiofrequency interference; telecommunication channels; adaptive feedback smart antennas; adaptive searching; adaptive tracking; base station; cdma2000 1xEV-DV systems; intracell interference; normalized least mean square algorithm; reverse channel quality indicator channel; smart antennas algorithm; uplink signal processing; Adaptive arrays; Antenna feeds; Antenna measurements; Base stations; Communication standards; Directive antennas; Feedback; Mobile antennas; Multiaccess communication; Signal processing algorithms;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207777
