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Clutter Properties for a Side-Looking Radar with Planar Regular and Irregular Subarrays
Blekinge Tekniska Högskola, Fakulteten för teknikvetenskaper, Institutionen för matematik och naturvetenskap.
2015 (Engelska)Ingår i: 2015 16TH INTERNATIONAL RADAR SYMPOSIUM (IRS), 2015, s. 730-735Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The effect of the subarray design in a side-looking moving radar with a planar antenna on some clutter properties which are important for suppressing the clutter with STAP (Space-Time Adaptive Processing) is investigated by simulations. These properties are interference DOA Doppler Spectrum (DDS) and clutter rank. The conclusions from the work is that irregular antennas give less clutter in the DDS and that larger subarrays give lower clutter rank.

Ort, förlag, år, upplaga, sidor
2015. s. 730-735
Serie
International Radar Symposium Proceedings, ISSN 2155-5745
Nyckelord [en]
ARRAYS; RANK
Nationell ämneskategori
Telekommunikation Annan elektroteknik och elektronik
Identifikatorer
URN: urn:nbn:se:bth-12963ISI: 000380372600159ISBN: 978-3-9540-4853-3 (tryckt)OAI: oai:DiVA.org:bth-12963DiVA, id: diva2:956680
Konferens
16th International Radar Symposium (IRS), JUN 24-26, 2015, Dresden, GERMANY
Tillgänglig från: 2016-08-31 Skapad: 2016-08-30 Senast uppdaterad: 2017-03-14Bibliografiskt granskad
Ingår i avhandling
1. Signal Processing for Radar with Array Antennas and for Radar with Micro-Doppler Measurements
Öppna denna publikation i ny flik eller fönster >>Signal Processing for Radar with Array Antennas and for Radar with Micro-Doppler Measurements
2017 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Radar (RAdio Detection And Ranging) uses radio waves to detect the presence of a target and measure its position and other properties. This sensor has found many civilian and military applications due to advantages such as possible large surveillance areas and operation day and night and in all weather. The contributions of this thesis are within applied signal processing for radar in two somewhat separate research areas: 1) radar with array antennas and 2) radar with micro-Doppler measurements.

Radar with array antennas: An array antenna consists of several small antennas in the same space as a single large antenna. Compared to a traditional single-antenna radar, an array antenna radar gives higher flexibility, higher capacity, several radar functions simultaneously and increased reliability, and makes new types of signal processing possible which give new functions and higher performance.

The contributions on array antenna radar in this thesis are in three different problem areas. The first is High Resolution DOA (Direction Of Arrival) Estimation (HRDE) as applied to radar and using real measurement data. HRDE is useful in several applications, including radar applications, to give new functions and improve the performance. The second problem area is suppression of interference (clutter, direct path jamming and scattered jamming) which often is necessary in order to detect and localize the target. The thesis presents various results on interference signal properties, antenna geometry and subarray design, and on interference suppression methods. The third problem area is measurement techniques for which the thesis suggests two measurement designs, one for radar-like measurements and one for scattered signal measurements.

Radar with micro-Doppler measurements: There is an increasing interest and need for safety, security and military surveillance at short distances. Tasks include detecting targets, such as humans, animals, cars, boats, small aircraft and consumer drones; classifying the target type and target activity; distinguishing between target individuals; and also predicting target intention. An approach is to employ micro-Doppler radar to perform these tasks. Micro-Doppler is created by the movement of internal parts of the target, like arms and legs of humans and animals, wheels of cars and rotors of drones.

Using micro-Doppler, this thesis presents results on feature extraction for classification; on classification of targets types (humans, animals and man-made objects) and human gaits; and on information in micro-Doppler signatures for re-identification of the same human individual. It also demonstrates the ability to use different kinds of radars for micro-Doppler measurements. The main conclusion about micro-Doppler radar is that it should be possible to use for safety, security and military surveillance applications.

Ort, förlag, år, upplaga, sidor
Karlskrona: Blekinge Tekniska Högskola, 2017. s. 180
Serie
Blekinge Institute of Technology Doctoral Dissertation Series, ISSN 1653-2090 ; 2
Nyckelord
radar, signal processing, array antenna, subarray, clutter, jamming, interference, direction of arrival estimation, security, micro-Doppler, feature extraction, classification
Nationell ämneskategori
Signalbehandling
Identifikatorer
urn:nbn:se:bth-13639 (URN)978-91-7295-335-2 (ISBN)
Disputation
2017-03-31, Karlskrona, 00:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2017-01-16 Skapad: 2016-12-18 Senast uppdaterad: 2017-03-08Bibliografiskt granskad

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