A Novel Constrained Waveform Designing for MIMO RADAR Using Optimization Algorithms

Abstract

MIMO RADAR system is efficacious in forming the desired beampattern by using transmit waveform design methodology. In this work, a distinctive approach is carried out to design null-steered transmit beamforming through discrete polyphase-coded waveforms. These waveforms are optimized and analysed in space domain and also checked for orthogonality in time domain. The cost function is inducted in order to achieve radiation nulls in the direction of the jammer, other radars, undesired target, etc. Besides widely held optimization algorithms, a novel metaheuristic approach namely “Jaya” algorithm is dealt with, implemented and compared in the designing of traditional and polyphase waveforms. Unlike other population-based algorithms, the absence of algorithm-specific parameters makes it computationally effective. The proposed approach applied post optimization process satisfies the design constraint for creating discrete-valued phases. “Jaya” optimization with regard to the polyphase waveform design, in space domain endows the least radiation null notch of $-124.4$ dB. The design time metric is also significantly minimized. Further, the effect of phase error on the designed beampatterns are analysed. The proposed method offers a reasonable trade-off between the number of design constraints and beamformer performance even in the erroneous environment. A higher value of M in M-phase-coded waveform guarantees robust beamforming specifically in multiple nulls scenarios. The approaches are validated with mathematical modelling and numerical simulations.

Keywords:

• Beamforming
• MIMO RADAR
• Optimization
• Phase shift network
• Poly phase waveforms
• Signal processing

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Pooja M. Bhamre  http://orcid.org/0000-0001-5463-0591

Additional information

Notes on contributors

Pooja M. Bhamre

Pooja Bhamre was born in 1986. She received the B. Tech. degree in Electronics and Telecommunication engineering from College of Engineering Pune (COEP), Pune, India, 2007. From 2011 to 2013, she was pursuing the postgraduate study in K K Wagh College of Engineering, Nashik, Pune university. She is currently pursuing the PhD degree from the Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat, India. Her research interests are RADAR signal processing, MIMO RADAR and Optimization.

Shilpi Gupta

Dr Shilpi Gupta received her bachelor and master degree in 2004 and 2007 in Electronics and Communication from U.P technical University and Kurukshetra University respectively. She received her Ph.D degree from Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India in 2015. She is presently Associate professor at SVNIT, Surat. She is a lifetime Associate member of IETE. Her research interest focuses in advanced wireless Technologies like MIMO technology, 5G technology, Massive MIMO Technology, Optical sensors, Free space optics, optical amplifiers. Email: [email protected]