Journal
REMOTE SENSING
Volume 14, Issue 16, Pages -Publisher
MDPI
DOI: 10.3390/rs14163951
Keywords
array signal processing; direction-of-arrival (DOA) estimation; wideband sources; coherent signals
Categories
Funding
- Innovation Project of Science and Technology Commission of the Central Military Commission [19-HXXX-01-ZD-006-XXX-XX]
- National Key Laboratory Foundation [61424110302]
- National Natural Science Foundation of China [61771015]
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A new method is proposed in this paper to address the problem of estimating the direction of arrival (DOA) for mixed uncorrelated and correlated wideband signals in multipath environments. By establishing a novel signal model and dividing the estimator into two parts, the accuracy of DOA estimators for correlated wideband sources has been improved.
A novel direction-of-arrival (DOA) estimator is proposed for the mixed uncorrelated and correlated wideband sources in the multipath environment. Firstly, the novel signal model is established using the aligned envelope technique. Next, the estimator can be divided into two parts. Theoretical analyses show that the correlated components cannot form peaks and only the DOA of uncorrelated signals can be acquired in the first part. Then, the correlated components are extracted from the corresponding covariance matrix and handled in the second part. Using the concept of linear search, the computational complexity of the algorithm is significantly reduced. Simulation results show the direction of uncorrelated and correlated wideband signals can be processed and distinguished effectively in the proposed method. Compared with previous DOA estimators for correlated wideband sources, the estimation accuracy has been improved.
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