Adaptive sector size control in a CDMA system using Butler matrix

Author

Mahmoudi, Manoachehr ; Sousa, Elvino S. ; Alavi, Hossein

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada

Volume

2

fYear

1999

fDate

36342

Firstpage

1355

Abstract

There has been considerable interest in the subject of smart antenna systems. We propose a Butler matrix fed circular array for modifying the already deployed fixed sector CDMA systems to an adaptive sectorized one. Using a simple algorithm for adaptation: it has been shown that the proposed system is capable of overcoming non-uniform user distributions, and effectively obtain higher capacity compared to current cellular systems. Our approach can be smoothly evolved towards a high capacity switched beam architecture

Keywords

adaptive antenna arrays; adaptive control; antenna feeds; cellular radio; channel capacity; code division multiple access; personal communication networks; Butler matrix fed circular array; CDMA system; PCS; adaptation algorithm; adaptive sector size control; base station antenna; cellular systems; high capacity switched beam architecture; nonuniform user distributions; personal communication services; smart antenna systems; Adaptive control; Azimuth; Butler matrix; Finite impulse response filter; Interpolation; Multiaccess communication; Phase shifters; Phased arrays; Programmable control; Size control;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999 IEEE 49th

Conference_Location

Houston, TX

ISSN

1090-3038

Print_ISBN

0-7803-5565-2

Type

conf

DOI

10.1109/VETEC.1999.780568

Filename

780568