Fast DOA estimation of incoherently distributed sources by novel propagator
Tóm tắt
A low-complexity algorithm is presented for the estimation of the nominal direction-of-arrivals (DOAs) of incoherently distributed (ID) sources. The presented algorithm estimates the nominal DOAs of ID sources by a novel propagator method which makes use of the approximate rotational invariance relationship between two closely spaced identical uniform linear arrays. Without any search and the eigendecomposition of the sample covariance matrix, our algorithm can provide lower computational complexity than other known methods. In addition, it can be applied to the multisource scenario with different angular distribution shapes. Simulation results prove the effectiveness of the presented algorithm.
Tài liệu tham khảo
Bengtsson, M. (1999). Antenna array processing for high rank data models, PhD Dissertation, Stockholm, Sweden: Royal Institute of Technology, Signal, Sensors, Systems Department.
Besson O., Vincent F., Stoica P. (2000) Approximate maximum likelihood estimators for array processing in multiplicative noise environments. IEEE Transactions on Signal Processing 48(9): 2506–2518
Besson O., Stoica P. (2000) Decoupled estimation of DOA and angular spread for a spatially distributed source. IEEE Transactions on Signal Processing 48(7): 1872–1882
Guo X. S., Wan Q., Chang C. Q. et al (2010) Source localization using a sparse representation framework to achieve superresolution. Multidimensional Systems and Signal Process 21(4): 391–402
Marcos S., Marsal A., Benidir M. (1995) The propagator method for source bearing estimation. Signal Processing 42(2): 121–138
Meng Y., Stoica P., Wong K. M. (1996) Estimation of the direction of arrival of spatially dispersed signals in array processing. IEE Proceedings of Radar, Sonar and Navigation 143(1): 1–9
Raich R., Goldberg J., Messer H. (2000) Bearing estimation for a distributed source: Modeling, inherent accuracy limitations and algorithms. IEEE Transactions on Signal Processing 48(2): 429–441
Shahbazpanahi S., Valaee S., Bastani M. H. (2001) Distributed source localization using ESPRIT algorithm. IEEE Transactions on Signal Processing 49(10): 2169–2178
Trump T., Ottersten B. (1996) Estimation of nominal direction of arrival and angular spread using an array of sensors. Signal Processing 50(4): 57–69
Valaee S., Champagne B., Kabal P. (1995) Parametric localization of distributed sources. IEEE Transactions on Signal Processing 43(9): 2144–2153
Xu Y. G., Liu Z. W. (2007) Closed-form multiple invariance ESPRIT. Multidimensional Systems and Signal Process 18(1): 47–54
Zetterberg, P. (1997). Mobile cellular communications with base station antenna arrays: Spectrum efficiency, algorithms, and propagation models, PhD Dissertation. Stockholm, Sweden: Royal Institute of Technology, Signal, Sensors, Systems Department.