Antenna patterns for detecting slowly moving targets in two channel gmti processing

Download

index.pdf

Date

2010

Author

Yıldırım, Gökhan

Metadata

Show full item record

Item Usage Stats

383
views

223
downloads

Ground Moving Target Indicator (GMTI) is a well-known and widely used signal processing method in airborne and spaceborne radars. In airborne radar and GMTI literature, many radar designs and signal processing techniques have been developed to increase the detection and estimation performance under heavy interference conditions. The motion of the aircraft on which the radar is mounted, high altitudes and ranges, targets with low radar cross sections and slowly moving targets complicates the problem of localization and observation of moving targets on a huge area of interest. In order to overcome these problems, engineers developed more complex radar hardwares with many receiver channels and signal processing algorithms. Multi-channel receivers provide adaptive digital beam-forming and adaptive Doppler processing capabilities. However, designing a cost efficient and light multi-channel receiver and a signal processing unit, which can handle a huge amount of received data from multi channels, is a difficult task to accomplish. Therefore, this thesis aims to propose non-adaptive antenna beams to reduce the number of channels to two in GMTI processing. This reduction yields a simplification both in receiver structure and signal processing unit. The measure of excellence of these propositions will be the ability to detect slowly moving targets with nearly optimum performance.

Subject Keywords

Electrical engineering.

URI

http://etd.lib.metu.edu.tr/upload/2/12612152/index.pdf
https://hdl.handle.net/11511/19543

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Detection of airport runways in optical satellite images Zöngür, Uğur; Ulusoy, İlkay; Department of Electrical and Electronics Engineering (2009) Advances in hardware and pattern recognition techniques, along with the widespread utilization of remote sensing satellites, have urged the development of automatic target detection systems. Automatic detection of airports is particularly essential, due to the strategic importance of these targets. In this thesis, a detection method is proposed for airport runways, which is the most distinguishing element of an airport. This method, which operates on large optical satellite images, is composed of a segmenta...
Milimeterwave FMCW radar design İçöz, Dilşad; Hızal, Altunkan; Department of Electrical and Electronics Engineering (2009) In traffic radar system, Frequency Modulated Continuous Wave (FMCW) will be used since these radars are preferred in short distance and high range resolution systems. The system to be constructed is not only a system operating with Doppler principle and detection of speed; on the contrary a functional radar is planned to be produced. In various traffic radars in use, Doppler shift constituted by the targets causing high reflection within detection field is measured and the measured speed corresponding to th...
Linear prediction for single snapshot multiple target doppler estimation under possibly moving radar clutter Öztan, Baha Baran; Tanık, Yalçın; Department of Electrical and Electronics Engineering (2008) We have devised a processor for pulsed Doppler radars for multi-target detection in same folded range under land and moving clutter. To this end, we have investigated the estimation of parameters, i.e., frequencies, amplitudes, and phases, of complex exponentials that model target echoes under radar clutter characterized by antenna scanning modulation with observation limited to single snapshot, i.e., one burst. The Maximum Likelihood method of estimation is presented together with the bounds on estimates, ...
Design and implementation of low phase noise phase locked loop based local oscillator Bölücek, Muhsin Alperen; Yıldırım, Nevzat; Department of Electrical and Electronics Engineering (2009) In this thesis, a low phase noise local oscillator operating at 2210 MHz is designed and implemented to be used in X-Band transmitter of a LEO satellite. Designed local oscillator is a PLL (Phase Locked Loop) based frequency synthesizer which is implemented using discrete commercial components including ultra low noise voltage controlled oscillator and high resolution, low noise fractional-N synthesizer. Operational settings of the synthesizer are done using three wire serial interface of a microcontroller....
Collaborative mobile target imaging in ultra-wideband wireless radar sensor networks Arık, Muharrem; Akan, Özgür Barış; Department of Electrical and Electronics Engineering (2008) Wireless sensor networks (WSN) have thus far been used for detection and tracking of static and mobile targets for surveillance and security applications. However, detection and tracking do not suffice for a complete satisfaction of these applications and an accurate target classification. To address this need, among various target classification methods, imaging of target yields the most valuable information. Nevertheless, imaging of mobile targets moving over an area requires networked and collaborative d...

Citation Formats

G. Yıldırım, “Antenna patterns for detecting slowly moving targets in two channel gmti processing,” M.S. - Master of Science, Middle East Technical University, 2010.