A harmonic noise model for direction finding in colored ambient noise
Filiep J. Vanpoucke, Arogyaswami J. Paulraj · IEEE Signal Processing Letters · 1995
High-resolution algorithms for direction finding of narrowband sources require a good estimate of the noise correlation matrix. We derive a physically motivated linear noise model. It is based on a Fourier expansion of the ambient noise field and is applicable to arbitrary antenna arrays. We also show that for contrived cases, a linear model may not be uniquely identifiable.>