Abstract
Compared with the standard estimation of signal parameters via rotational invariance technique (ESPRIT) for direction of arrival estimation, the propagator-based ESPRIT is a more computationally efficient method since it requires no eigenvalue decomposition when calculating the signal subspace. In this study, the propagator-based ESPRIT method is analysed by deriving its theoretical asymptotic error. With first-order perturbation analysis, it is shown that both propagator-based ESPRIT and standard ESPRIT have the same asymptotic error with high signal-to-noise ratio. Simulation results of both the propagator-based ESPRIT and the standard ESPRIT are presented, and they are shown to be consistent with the theoretical derivations.
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