TY - GEN
T1 - Directions-of-arrival estimation using a sparse spatial spectrum model with uncertainty
AU - Zheng, J.
AU - Kaveh, M.
PY - 2011
Y1 - 2011
N2 - This paper is concerned with the estimation of the directions-of-arrival (DOA) of narrowband sources using a sparse spatial spectral model, when the model itself is not precise. When the model uncertainty is limited to DOAs not belonging to the search grid, off-grid error linearization given in [1], and constraint relaxation are used to effect a convex problem. This approach is useful either in reducing the dimension through the use of coarser candidate DOA grid, or improving the performance of estimators that use dense grids. In addition, a particular diagonal loading approach is proposed to reduce the sensitivity of the estimator to the choice of its regularization parameter.
AB - This paper is concerned with the estimation of the directions-of-arrival (DOA) of narrowband sources using a sparse spatial spectral model, when the model itself is not precise. When the model uncertainty is limited to DOAs not belonging to the search grid, off-grid error linearization given in [1], and constraint relaxation are used to effect a convex problem. This approach is useful either in reducing the dimension through the use of coarser candidate DOA grid, or improving the performance of estimators that use dense grids. In addition, a particular diagonal loading approach is proposed to reduce the sensitivity of the estimator to the choice of its regularization parameter.
KW - Diagonal Loading
KW - Sparse Spectrum
UR - http://www.scopus.com/inward/record.url?scp=80051651146&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80051651146&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2011.5947078
DO - 10.1109/ICASSP.2011.5947078
M3 - Conference contribution
AN - SCOPUS:80051651146
SN - 9781457705397
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 2848
EP - 2851
BT - 2011 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 - Proceedings
T2 - 36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011
Y2 - 22 May 2011 through 27 May 2011
ER -