Subspace based radar signal processing methods for array tapering and sidelobe blanking

Download

index.pdf

Date

2017

Author

Dinler, Doğancan

Metadata

Show full item record

Item Usage Stats

312
views

126
downloads

The discretization of the signal impinging on several hundreds, even thousands, of receiving elements has become a common problem in modern phased array radar systems along with the developments in the digital signal processing. The spatial and temporal processing of such large dimensional data is too challenging for all steps of signal processing. This thesis is focused on the subspace methods that making the processing of the full dimensional data feasible at reduced dimensions. The first objective of the thesis is to develop a proper subspace such that the essence of the signal coming from a predefined sector is captured at reduced dimensions. To realize that aim, eigenvector and Fourier bases of the sector are studied and evaluation of these bases are performed considering the detection and parameter estimation performances. The second objective is to apply some conventional radar signal processing methods, namely array tapering and sidelobe blanking, at reduced dimensions. The main contributions are subspace construction and reduced dimensional implementations of array tapering and sidelobe blanking. Numerical results are provided to evaluate the performance of suggested methods in different scenarios.

Subject Keywords

Beamforming., Antenna arrays., Signal processing., Antennas (Electronics).

URI

http://etd.lib.metu.edu.tr/upload/12621404/index.pdf
https://hdl.handle.net/11511/26754

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Wideband omnidirectional and sector coverage antenna arrays for base stations Alatan, Lale (2018-01-01) By using parallel strip line fed printed dipole antennas as array elements, an omnidirectional antenna array and a wide angle sector coverage array operating in octave band are designed. A maximum deviation of ±1.25 dB from the omnidirectional pattern is achieved for the omnidirectional array, and the average gain of the antenna was measured as being 5 dB in the 1.35–2.7GHz band. For the sector coverage array, a special reflector design is utilized to maintain a half power beam width of around 115◦ with a s...
Design and analysis of ultra-wideband (UWB) printed monopole antennas of circular shape Karadağ, Serkan; Aydın Çivi, Hatice Özlem; Department of Electrical and Electronics Engineering (2017) This study proposes three microstrip line fed circular monopole antennas with ultra-wideband (UWB) characteristics, improved omnidirectional radiation pattern and WLAN (5 GHz-6 GHz) band notched characteristics for wireless and mobile communication systems. In this thesis, first, a microstrip line fed ultra-wideband ring monopole antenna with improved omnidirectional radiation pattern is designed, fabricated and measured. Two corners are tapered on the ground plane for increasing impedance bandwidth. In ord...
Efficient numerical analysis and design of reflectarray antennas Erçil, Erdinç; Aydın Çivi, Hatice Özlem; Alatan, Lale; Department of Electrical and Electronics Engineering (2015) The accurate numerical analysis of electrically large reflectarray antennas has been a challenging task since their advent because it becomes impractical to employ the generalized numerical electromagnetic tools for their numerical analysis. Therefore the classical approach is to resort to approximate methods. However, approximate methods trade off accuracy against memory and speed. In this thesis study; an approximate analysis technique is established such that it is more accurate than the present approxim...
Theoretical investigation and design of wideband dielectric resonator antennas Yüksel, Yılmaz Çağrı; Alatan, Lale; Department of Electrical and Electronics Engineering (2015) The aim of this thesis is to utilize Dielectric Resonator Antennas (DRA) as array elements due to their advantages over other conventional antenna elements such as dipoles and microstrip patches. Depending on both the excitation mechanisms and the antenna shape, a Dielectric Resonator Antenna (DRA) provides its designer multiple independent degrees of freedom. In this thesis three antenna shapes, namely hemispherical, cylindrical and rectangular DRAs, are investigated. The cylindrical and the rectangular sh...
Performance analysis of direction-of-arrival estimation algorithms in the presence of array imperfections and multipath for different antenna array geometries / Çalışkan, Mustafa; Tuncer, Temel Engin; Department of Electrical and Electronics Engineering (2014) Direction of Arrival (DOA) Estimation is an important topic in signal processing. In this thesis, DOA estimation is considered when there are gain/phase mismatches, mutual coupling for the antennas and multipath signals are observed. In the first part, DOA estimation for uniform linear array (ULA) in the presence of mutual coupling is considered. Different methods in the literature are investigated and a promising solution for this case [1] is implemented. Auxiliary sensors are used and MUSIC algorithm is e...

Citation Formats

D. Dinler, “Subspace based radar signal processing methods for array tapering and sidelobe blanking,” M.S. - Master of Science, Middle East Technical University, 2017.