T h e inaccuracy of Elmore delay [3] f o r interconnect delay estimation i s well-documented. However it remains a popular delay measure t o drive performance optimization procedures such as wire-sizing and topology construction. This paper studies the meri ts of incorporating “better-than-Elmore” delay measures into the optimization process. T h e proposed delay metr ics use a table-lookup met...

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 accuracy of the time delay estimation using the direct correlation technique has been theoretically calculated. The random errors of the time delay estimation in digital ultrasonic measurement systems have been studied. The techniques for the time-offlight (ToF) estimation have been discussed. The theoretical equations for analog and discrete case are presented. Numerical simulation has bee...

This paper presents a robust detection approach in the presence of transmission delay estimation errors in asynchronous CDMA frequency selective Rayleigh fading channels. The transmission delays in asynchronous channels need to be estimated in practice and are subject to estimation errors, which may cause severe performance degradation for most detectors assuming perfect synchronization. As the...

In this paper, a new method for extracting the system phase from the bispectrum of the system output has been proposed. This is based on the complete bispectral data computed in the frequency domain and modified group delay. The frequency domain bispectrum computation improves the frequency resolution and the modified group delay reduces the variance preserving the frequency resolution. The use...

In the next generation mobile communication systems, multiple-input multiple-output (MIMO) multiplexing is an indispensable technique to achieve very high-speed data transmission with a limited bandwidth. In MIMO multiplexing, it is necessary to estimate the channels between transmit and receive antennas for signal detection. In this paper, we propose a minimum mean square error (MMSE) channel ...

The ranging algorithm allows active stations to measure their distances to the headend for synchronization purpose in Hybrid Fiber Coax (HFC) networks. A practicable mechanism to resolve contention among numerous stations is to randomly delay the transmission of their control messages. Since shorter contention cycle time increases slot throughput, this study develops three mechanisms, fixed ran...

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...