On MIMO Radar Subarrayed Transmit Beamforming

Multiple-input-multiple-output (MIMO) radar schemes whereby the transmit array is partitioned into subarrays have recently been proposed in the literature to combine advantages of phased array and MIMO radar technology. In this work, we utilize this architecture to significantly simplify a transmit...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on signal processing 2012-04, Vol.60 (4), p.2076-2081
Main Authors: Wilcox, D., Sellathurai, M.
Format: Article
Language:English
Subjects:
Apertures
Applied sciences
Arrays
Covariance matrix
Cramer-Rao bounds
Cramér Rao bounds
Detection, estimation, filtering, equalization, prediction
estimation
Exact sciences and technology
Information, signal and communications theory
MIMO
MIMO radar
multiple-input-multiple-output (MIMO) radar
Optimization
Parameter estimation
Radar
Radar arrays
Sidelobes
Signal and communications theory
Signal, noise
Telecommunications and information theory
Vectors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Multiple-input-multiple-output (MIMO) radar schemes whereby the transmit array is partitioned into subarrays have recently been proposed in the literature to combine advantages of phased array and MIMO radar technology. In this work, we utilize this architecture to significantly simplify a transmit procedure in which the covariance matrix across the MIMO radar array is optimized to improve the Cramér-Rao bound (CRB) on target parameter estimation. The MIMO effective array for regular subarrayed transmit apertures is studied, and necessary conditions to obtain a filled effective aperture are presented, which is important for maintaining nonambiguous, low sidelobe beampatterns. The performance of the subarrayed transmit approach is evaluated in terms of the CRB on target parameter estimation, and the optimisation of the beamformer applied to the subarrays to minimize the CRB is considered. The subarrayed transmit scheme is found to have a CRB which is suboptimal to the full diversity transmission, as expected, but is solvable in a small fraction of the time using an iterative beamspace algorithm developed here.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2011.2179540