A new algorithm has been presented to estimate the direction-of-arrival (DOA) in the presence of coherent signals.The conception of C-SPRIT has been used in our algorithm.By forming special data matrix
our algorithm performs well in estimation of DOA
no matter there are coherent signals or not.The DOA estimation of coherent signals has been mitigated by conventional spatial smoothing using the divided sub arrays.However
this result is obtained at the cost of losing effective spatial aperture
and the detectable number of coherent signals is 2
N
/3 at most (
N
is the number of array sensors).Compared with spatial smoothing method
our algorithm not only improves the estimation accuracy but also can detect
N
-1 coh
erent signals without aperture loss.The de-correlation of coherent signals is completely solved.The computational load is reduced by using the numerical algorithms of ESPRIT without spectral peak search.Computer simulation results are provided to verify the validity and superiority.