Title: Transmit beampattern optimisation design based on constant beamwidth

Authors: Ling Huang; Zhiming He; Pengcheng Gong

Addresses: College of Electronic Engineering, University of Electronic Science and Technology, Chendu 611731, China; College of Electronic and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, China ' College of Electronic Engineering, University of Electronic Science and Technology, Chendu 611731, China ' College of Electronic Engineering, Hubei University of Technology, Wuhan 430070, China

Abstract: Wideband constant beamwidth beamforming is one of the key technologies achieving low probability of intercept (LPI) performance in the area of array signal processing. In this paper, based on MIMO radar signals, firstly, two approaches are proposed to synthesise the power spectral density matrix (PSDM) to approximate given beampatterns. Then, both proposed approaches are converted into the second-order cone programming (SOCP) problems by introducing new variables. Finally, the minimum points of the new cost functions are solved by the convex optimisation toolbox. Numerical simulation results show that the proposed approaches are effective compared with the existing wideband beampattern design approach; also, the designed beampatterns maintain a constant beamwidth across the entire frequency band.

Keywords: constant beamwidth; transmit beampattern optimisation; power spectral density matrix; PSDM; second-order cone programming; SOCP; wideband beamforming; low probability of intercept; LPI; array signal processing; MIMO radar signals; numerical simulation.

DOI: 10.1504/IJMIC.2016.075279

International Journal of Modelling, Identification and Control, 2016 Vol.25 No.2, pp.102 - 110

Received: 09 Jun 2015
Accepted: 15 Jul 2015
Published online: 09 Mar 2016 *

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