Compact arrays for mobile platforms : trade-off between size and performance for SDMA and MIMO applications

Chaloupka, Heinz J, Wang, Xin, & Coetzee, Jacob (2003) Compact arrays for mobile platforms : trade-off between size and performance for SDMA and MIMO applications. In Proceedings of the 48th Internationales Wissenschaftliches Kolloquium, Technische Universitat Ilmenau, Fakultat fur Elektrotechnik und Informationstechnik , Technische Universität Ilmenau, Ilmenau, Germany, pp. 1-18.

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Smart antenna receiver and transmitter systems consist of multi-port arrays with an individual receiver channel (including ADC) and an individual transmitter channel (including DAC)at every of the M antenna ports, respectively. By means of digital beamforming, an unlimited number of simultaneous complex-valued vector radiation patterns with M-1 degrees of freedom can be formed. Applications of smart antennas in communication systems include space-division multiple access. If both stations of a communication link are equipped with smart antennas (multiple-input-multiple-output, MIMO). multiple independent channels can be formed in a "multi-path-rich" environment. In this article, it will be shown that under certain circumstances, the correlation between signals from adjacent ports of a dense array (M + ΔM elements) can be kept as low as the correlation between signals from adjacent ports of a conventional array (M elements and half-wavelength pacing). This attractive feature is attained by means of a novel approach which employs a RF decoupling network at the array ports in order to form new ports which are decoupled and associated with mutually orthogonal (de-correlated) radiation patterns.

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ID Code: 53991
Item Type: Conference Paper
Refereed: Yes
Keywords: MIMO systems, antenna arrays, SDMA, MIMO antennas
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Electrical and Electronic Engineering not elsewhere classified (090699)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2003 Fakultät für Elektrotechnik und Informationstechnik
Deposited On: 07 Oct 2012 22:25
Last Modified: 10 Oct 2012 04:17

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