Title :
Adaptive antenna arrays for cellular CDMA communication systems
Author :
Wang, Yiping ; Cruz, J.R.
Author_Institution :
Sch. of Electr. Eng., Oklahoma Univ., Norman, OK, USA
Abstract :
The use of an adaptive antenna array at the base station in the reverse link of cellular communication systems is proposed. Two kinds of adaptive methods are considered. First, the recursive least squares (RLS) algorithm, which is a reference signal based method, is used to adjust the weight coefficients of the array. For eigenstructure based methods, the ESPRIT algorithm is used for angle of arrival (AOA) estimation and the linear least squares estimate (LLSE) is used to determine the adaptive array weights. The improvement in performance is quantified by comparison with the omnidirectional antenna system using realistic simulations. The comparisons of different adaptive arrays are discussed and analyzed
Keywords :
adaptive antenna arrays; adaptive estimation; cellular radio; code division multiple access; direction-of-arrival estimation; eigenvalues and eigenfunctions; least squares approximations; recursive estimation; ESPRIT algorithm; adaptive antenna array; adaptive array weights; angle of arrival estimation; base station; cellular CDMA communication systems; eigenstructure based methods; linear least squares estimate; recursive least squares algorithm; reference signal based method; reverse link; weight coefficients; Adaptive algorithm; Adaptive arrays; Antenna arrays; Base stations; Convergence; Least squares approximation; Multiaccess communication; Resonance light scattering; Time division multiple access; White noise;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location :
Detroit, MI
Print_ISBN :
0-7803-2431-5
DOI :
10.1109/ICASSP.1995.480030
