Abstract
A second-order statistics-based algorithm is proposed for two-dimensional (2D) direction-of-arrival (DOA) estimation of coherent signals. The problem is solved by arranging the elements of the correlation matrix of the signal received from a uniform rectangular array to a block Hankel matrix. In noiseless cases, it is shown that the rank of the block Hankel matrix equals the number of the DOAs and is independent of the coherency of the incoming waves. Therefore, the signal subspace of the block Hankel matrix can be estimated properly and spans the same column space as the array response matrix. Two matrix pencil pairs containing the DOA parameters are extracted from the signal subspace. This matrix pencil-based estimation problem is then resolved using our previously proposed pairing-free 2D parameter estimation algorithm. Simulation results show that the proposed algorithm outperforms the spatial smoothing method in terms of mean square error (MSE). © 2010 IEEE.
| Original language | English |
|---|---|
| Pages (from-to) | 1477-1484 |
| Journal | IEEE Transactions on Aerospace and Electronic Systems |
| Volume | 46 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jul 2010 |
| Externally published | Yes |
Funding
This work was supported by the NSF of China (Grant 60672065), the Natural Science Foundation of Guangdong Province, China (Grant8151064101000066), and the City University Strategic Grant (Grant 7002294).