Joint Doppler frequency, 2D-DOD and 2D-DOA estimation for bistatic MIMO radar in spatial coloured noise

Abstract

In this paper, we address the problem of four-dimensional angle and Doppler frequency estimation for L-shaped bistatic multiple input multiple output radar in spatial coloured noise. A novel method of joint estimation of Doppler frequency, two-dimensional direction of departure and two-dimensional direction of arrival based on the propagator method is discussed. Utilising the cross-correlation matrix which is formed by the adjacent outputs of matched filter in the time domain, the special matrix is constructed to eliminate the influence of spatial coloured noise. The proposed algorithm provides lower computational complexity and has very close parameter estimation to the estimation of signal parameters via rotational invariance techniques algorithm and DOA-matrix algorithm in high signal-to-noise ratio and Cramér–Rao bound is given. Furthermore, multidimensional parameters can be automatically paired by this algorithm to avoid the performance degradation resulting from wrong pairing. Numerical simulation results demonstrate the effectiveness of the proposed method.

Keywords:

• four-dimensional angle estimation
• Doppler frequency estimation
• propagator method
• MIMO radar
• spatial coloured noise

Acknowledgements

The authors are grateful to the anonymous referees for their constructive comments and suggestions in improving the quality of this paper.

Additional information

Funding

This work is supported by China NSF Grants [61371169], Nanjing University of Aeronautics & Astronautics Research Funding [NZ2013208] and Jiangsu Postdoctoral Research Funding Plan [1301013B].