MIMO radar beampattern design by using Phased-Costas waveforms with PAR constraints employing a generalized ambiguity function

Date

2023-04-30

Author

Celik, Ozan Onur
Tuncer, Temel Engin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

108
views

0
downloads

Multiple-input multiple-output (MIMO) radars have attracted interest due to some important advantages over Phased-array radars. The diversity that comes with multiple waveforms is used to maximize the power in the vicinity of targets and minimize the cross correlation of waveforms reflected from multiple targets for predefined angles. In this study, a novel approach is presented to overcome the limitations of current beamformer design techniques in terms of bandwidth, auto/cross (spatial) correlations, range-doppler resolutions, peak-to-average ratio (PAR) and mean squared error (MSE) for desired beamforming pattern. A generalized ambiguity function formulation is presented which employs all the beamformer design parameters in a mathematically tractable simple manner suitable for constrained optimization. We present Phased-Costas coded waveforms to generate desired beampatterns while minimizing range-doppler sidelobes and target cross-correlations with limited bandwidth. Beamformer design problem is casted as a constrained optimization which includes nonconvex PAR constraints. The resulting NP hard problem with nonconvex objective function is converted to a bi-convex form and the PAR constraints are converted as convex constraints. The final problem is efficiently solved by using Alternating Direction Method of Multipliers (ADMM) technique in polynomial time. The beamformer solution is shown to achieve PAR=1 with very little degradation compared to the unconstrained problem making the ultimate choice for MIMO beamforming applications. Several good features of the designed beamformer are shown through simulations and compared to the known methods.

Subject Keywords

ADMM, Generalized ambiguity function, MIMO radar, Peak to average ratio (PAR), Space-time coding, Transmit beampattern

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85148018364&origin=inward
https://hdl.handle.net/11511/102663

Journal

Digital Signal Processing: A Review Journal

DOI

https://doi.org/10.1016/j.dsp.2023.103948

Collections

Department of Electrical and Electronics Engineering, Article

Suggestions

OpenMETU
Core

Phased-COSTAS coding of MIMO radar waveforms for transmit beamforming using generalized ambiguity functions Çelik, Ozan Onur; Tuncer, Temel Engin; Department of Electrical and Electronics Engineering (2021-9) Multiple-input multiple-output (MIMO) radars have attracted interest due to some important advantages over Phased-array radars. The diversity that comes with multiple waveforms is used to maximize the power in the vicinity of targets and minimize the cross correlation of waveforms reflected from multiple targets for a predefined angular sectors. In this study, a novel approach is presented to overcome the limitations of current beamformer design techniques in terms of bandwidth, auto/cross (spatial) correla...
Jammer cancelation by using space-time adaptive processing Uysal, Halil; Severcan, Mete; Department of Electrical and Electronics Engineering (2011) Space-Time Adaptive Processing (STAP) has been widely used in spaceborne and airborne radar platforms in order to track ground moving targets. Jammer is an hostile electronic countermeasure that is being used to degrade radar detection and tracking performance. STAP adapts radar’s antenna radiating pattern in order to reduce jamming effectiveness. Jamming power that enters the system is decreased with respect to the adapted radiation pattern. In this thesis, a generic STAP radar model is developed and imple...
OPTIMUM DISCRETE PHASE-ONLY TRANSMIT BEAMFORMING WITH ANTENNA SELECTION Demir, Özlem Tuğfe; Tuncer, Temel Engin (2014-09-05) Phase-only beamforming is used in radar and communication systems due to its certain advantages. Antenna selection becomes an important problem as the number of antennas becomes larger than the number of transmit-receive chains. In this paper, discrete single group multicast transmit phase-only beamformer design with antenna subset selection is considered. The problem is converted into linear form and solved efficiently by using mixed integer linear programming to find the optimum subset of antennas and bea...
Radar emitter emulation for research and experimental purposes. Çelebi, M. Bahadır; Koç, Seyit Sencer; Department of Electrical and Electronics Engineering (2009) The scope of this thesis is to implement radar emitter emulator in a low cost, portablehardware for operational and educational purposes. The model enables pulse train generation in real environment belonging to radar emitters for military exercises. The motivation comes from another research area which is to design effective algorithms for deinterleaving mixed pulse sequences in a suitable hardware and this thesis, covers the work done for implementing a hardware that generates mixed pulse sequences. First...
Active vibration control of beam and plates by using piezoelectric patch actuators Lüleci, İbrahim Furkan; Özgüven, Hasan Nevzat; Department of Mechanical Engineering (2013) Conformal airborne antennas have several advantages compared to externally mounted antennas, and they will play an important role in future aircrafts. However, they are subjected to vibration induced deformations which degrade their electromagnetic performances. With the motivation of suppressing such vibrations, use of active vibration control techniques with piezoelectric actuators is investigated in this study. At first, it is aimed to control the first three bending modes of a cantilever beam. In this s...

Citation Formats

O. O. Celik and T. E. Tuncer, “MIMO radar beampattern design by using Phased-Costas waveforms with PAR constraints employing a generalized ambiguity function,” Digital Signal Processing: A Review Journal, vol. 135, pp. 0–0, 2023, Accessed: 00, 2023. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85148018364&origin=inward.