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This paper presents the use of Inverse Free Krylov
Subspace Algorithm (IFKSA) with Estimation of Signal
Parameters via Rotational Invariance Technique (ESPRIT)
for the DirectionofArrival (DOA) estimation under element
failure in a Uniform Linear Antenna Array (ULA). Failure of
a few elements results in sparse signal space. IFKSA algorithm
is an iterative algorithm to find the dominant eigenvalues
and is applied for decomposition of sparse signal space, into
signal subspace and the noise subspace. The ESPRIT is later
used to estimate the DOAs. The performance of the algorithm
is evaluated for various elements failure scenarios and noise
levels, and the results are compared with ESPRIT and Cramer
Rao Lower bound (CRLB). The results indicate a better
performance of the IFKSAESPRIT based DOA estimation
scheme under different antenna failure scenarios, and noise
levels.
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