Composite bound on the attainable mean square error in passive time-delay estimation from ambiguity prone signals (Corresp.)

The location of a radiating source can be determined by measuring the relative time-delay of its signal wavefront to several spatially separated receivers. A new technique is presented to investigate the performance of time-delay measurement schemes based on a modified version of the Ziv-Zakai lower bound. This technique is shown to yield a tight bound on the attainable mean-square measurement error for any prespecified signal-to-noise ratio conditions.