Title :
An online calibration algorithm for the CDMA-based adaptive antenna array
Author :
Lee, Chong Hyun ; Kim, Soohong ; Chun, Joohwan ; Lee, Jong Heun
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fDate :
Oct. 29 2000-Nov. 1 2000
Abstract :
We propose a new adaptive calibration algorithm for a CDMA-based antenna array in the presence of unknown gain and phase errors. The algorithm does not require any additional reference signal for calibration and can be applied to both the uplink and downlink. To speed up the convergence rate of the proposed algorithm, we use phase compensated input signals obtained by phase conjugate operation. We verify the algorithm using field data measured through a custom-built W-CDMA test-bed built by SK-telecom.
Keywords :
adaptive antenna arrays; array signal processing; calibration; code division multiple access; convergence of numerical methods; direction-of-arrival estimation; land mobile radio; least mean squares methods; multiuser channels; online operation; radio links; spread spectrum communication; CDMA-based adaptive antenna array; DOA estimation; LMS algorithm; RLS algorithm; SK-telecom; W-CDMA test-bed; adaptive calibration algorithm; convergence rate; direction of arrival estimate; downlink beamforming; field data; gain error; online calibration algorithm; phase compensated input signals; phase conjugate operation; phase error; uplink beamforming; wideband DS-CDMA service; Adaptive arrays; Antenna arrays; Calibration; Convergence; Detectors; Downlink; Least squares approximation; Phase detection; Phased arrays; Receiving antennas;
Conference_Titel :
Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-6514-3
DOI :
10.1109/ACSSC.2000.911257
