An Adaptive Array Antenna Based on the IQ-Division Bandpass Sampling

Shinya SASAKI  Tetsuki TANIGUCHI  Yoshio KARASAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.12   pp.3483-3490
Publication Date: 2003/12/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
IQ-division,  bandpass sampling,  adaptive array antenna,  software defined radio (SDR),  

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Summary: 
In this paper, as an important technology for the software-defined radio, a novel scheme of adaptive array antenna utilizing bandpass sampling technique is proposed. For adaptive signal processing, it is necessary to convert the radio frequency signal received by the antenna that is given by real number into baseband region, i.e., complex number region. Then, the method for dividing the bandpass sampled signal to in-phase and quadrature components is analyzed. The sampling scheme is called the IQ-division bandpass sampling. An adaptive array antenna based on the IQ-division bandpass sampling is characterized by the signal processing at the bandpass sampled signal stage, namely, intermediate frequency stage, not baseband. Finally, we will confirm the validity of the proposed scheme through an experiment in a radio anechoic chamber.