Abstract The Laser Interferometer Space Antenna (LISA) mission is a space-borne observatory designed to detect and characterize gravitational wave sources inaccessible ground-based detectors. relies on laser interferometry measure changes in space-time. In this context, non-avoidable noise within the LISA system, including tilt-to-length (TTL) coupling, reduce detector’s resolution complicate a...

We describe a pitch tracking method based on a time delay estimation technique. Given two frames of voiced speech and it’s time delay, we will run a linear regression on the unwrapped phase of the quotient of the spectrum of both frames. A weighted linear regression will allow us to avoid the effect of phases corrupted by spectral leakage and noise. Iterations adapting the frame length will all...

The problem of relative position estimation between two spacecraft based on X-ray pulsar measurements is addressed. A mathematical model is developed for the pulsar’s intensity as observed at each spacecraft. The time of arrival (TOA) of photons is modeled as a Poisson point process, and the relevant probability density functions are provided. A solution to the relative navigation problem is su...

The special Issue “Time Delay Systems: Modelling, Identification, Stability, Control and Applications” intents to collect high-erudite papers aiming theoretical and/or practical matters dealing with time delay systems. In feedback control systems, delay as a generic part of many processes is the phenomenon which unambiguously deteriorates the quality of a control performance. Modern control the...

In this paper a new time-delay estimation algorithm for compound point-processes is presented. Compound pointprocesses, a generalization of temporal point-processes, describe processes with discrete events, where each occurrence time is associated with certain features. It is shown that, although the events are not observable, the time delays from events at one location to the same events at a ...

A popular technique for time delay estimation is to use an FIR #lter to model the time di-erence and the #lter weights are interpolated with a sinc function to obtain the delay estimate. However, the sinc interpolator requires a su/ciently long #lter length for accurate delay estimation. In this paper, we propose to process the #lter weights via a least-squares-based method in order to acquire ...

With the Phase-Root-Seeking algorithm a new and very fast algorithm for time delay estimation was recently introduced, permitting the estimation of strain images in real-time. In this paper the accuracy of the real-time strain imaging concept is investigated by the most rigorous approach, i.e. a comparison to the theoretical accuracy limit: the Cramer-RaoLower-Bound. Simulations show, that this...