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Plausibility of assuming ideal arrays for direction of arrival estimation
KTH, School of Information and Communication Technology (ICT), Centres, Center for Wireless Systems, Wireless@kth. KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS. (Radio Systems Lab)ORCID iD: 0000-0002-3015-4495
1996 (English)In: IEEE Antennas and Propagation Society International Symposium. 1996 Digest, 1996, Vol. 2, p. 1364-1367 vol.2Conference paper, Published paper (Refereed)
Abstract [en]

In order to fulfil the increasing demands on capacity and coverage of mobile communication systems smart or intelligent antennas have been suggested. These antennas increase the spectral efficiency of a wireless system by using arrays of antenna elements to shape RF signals in particular directions. Generally, smart antennas can be divided into two approaches: switched multi-beam and adaptive. Adaptive antennas utilize sophisticated signal processing algorithms to continuously distinguish between the desired signal, multipath and interfering signal as well as to calculate their direction of arrival (DOA). This makes it possible to smoothly track users with main lobes and interferers with nulls and thereby constantly maximizing the SINR (signal-to-interference and noise ratio). The DOA is one of the most important parameter for an adaptive antenna system to estimate. It is also the main subject of this paper. We establish whether or not it is plausible to assume the array to be ideal (which is often assumed in array signal processing theory) when the received signals are actually collected with a physical array consisting of standard folded dipoles. In doing so we first measured the element patterns (or steering vectors) of a twelve element antenna array. The results were then used in array signal processing simulations. The performance of two DOA estimation algorithms, MUSIC and ESPRIT, are studied and compared.

Place, publisher, year, edition, pages
1996. Vol. 2, p. 1364-1367 vol.2
Keywords [en]
adaptive antenna arrays, adaptive signal processing, array signal processing, dipole antenna arrays, direction-of-arrival estimation, interference suppression, land mobile radio, radiofrequency interference, DOA, DOA estimation algorithms, ESPRIT, MUSIC, RF signals, SINR, adaptive antennas, antenna elements, array signal processing simulations, direction of arrival, direction of arrival estimation, element patterns, folded dipoles, ideal arrays, intelligent antennas, interfering signal, mobile communication systems, multipath, signal-to-interference and noise ratio, smart antennas, spectral efficiency, steering vectors, switched multibeam antennas, Adaptive arrays, Antenna arrays, Directive antennas, Intelligent systems, Mobile communication, Signal processing, Signal processing algorithms, Signal to noise ratio
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-221784DOI: 10.1109/APS.1996.549850OAI: oai:DiVA.org:kth-221784DiVA, id: diva2:1177230
Conference
IEEE Antennas and Propagation Society International Symposium. 1996 Digest
Note

QCR 20180207

Available from: 2018-01-24 Created: 2018-01-24 Last updated: 2018-02-07Bibliographically approved

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