Open AccessArray Calibration for CDMA Smart Antenna Systems
Author(s) -
Kyeong Mun Geon,
Park Hyung Geun,
Oh Hyun Seo,
Jung Jae Ho
Publication year - 2004
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.04.0103.0139
Subject(s) - calibration , transceiver , antenna array , antenna (radio) , electronic engineering , smart antenna , interference (communication) , beamforming , signal (programming language) , computer science , sensor array , channel (broadcasting) , engineering , directional antenna , physics , telecommunications , cmos , quantum mechanics , machine learning , programming language
In this paper, we investigate array calibration algorithms to derive a further improved version for correcting antenna array errors and RF transceiver errors in CDMA smart antenna systems. The structure of a multi‐channel RF transceiver with a digital calibration apparatus and its calibration techniques are presented, where we propose a new RF receiver calibration scheme to minimize interference of the calibration signal on the user signals. The calibration signal is injected into a multichannel receiver through a calibration signal injector whose array response vector is controlled in order to have a low correlation with the antenna response vector of the receive signals. We suggest a model‐based antenna array calibration to remove the antenna array errors including mutual coupling errors or to predict the element patterns from the array manifold measured at a small number of angles. Computer simulations and experiment results are shown to verify the calibration algorithms.