Delay-Hopped Transmitted-Reference(DHTR) is an attractive scheme for Ultra-wideband(UWB) systems. It relieves the channel estimation and the synchronization problems, which simplifies the UWB system. This paper presents a platform developed at Delft University of Technology. The purpose of the platform is to supply a hardware environment to implement DHTR UWB components. It can emulate real UWB...

The influence of the dispersion of glass seams only relevant for femtosecond lasers with a pulse length below 100 fs. This commonly used approximation holds only for visible and IR light. For UV fs-laser Z. Bor stated out that due to the large dispersion in the UV regime fs-pulses with a duration of a few hundred femtoseconds are significantly affected in lenses by the group delay [1]. When a p...

K e y w o r d s D e l a y , Differential equation, Impulses, Fixed point. 1. I N T R O D U C T I O N The object of this paper is to present existence and uniqueness results about the solution of a system of delay-differential equations with infinitely many state-dependent impulses. This type of problem is characterized by jumps in the solution of the system. The system is (s) = / ( t , x , ) + ...

It is known that the presence of delays hinders performance achievable by a feedback control system, and it can even lead to closed-loop instability if not considered during design. For this reason, predictors are often included in loop, although they typically require knowledge exact value delay, which some applications hard obtain practice. This paper presents method design an observer simult...

piezoelectric actuators are widely used in micro manipulation applications. however hysteresis nonlinearity limits accuracy of these actuators. this paper presents a novel approach utilizing a piezoelectric nano-stage as slave manipulator of a teleoperation system. the prandtl-ishlinskii (pi) model is used to model actuator hysteresis in feedforward scheme to cancel out this nonlinearity. a pas...