In this paper, we address the problem of joint direction-of-arrival (DoA) and range estimation using frequency diverse coprime array (FDCA). By incorporating structure offsets, a two-dimensional space-frequency virtual difference coarray corresponding to uniform offset is considered increase number degrees-of-freedom (DoFs). However, reconstruction doubly-Toeplitz covariance matrix computationa...

Abstract Space-time and time-varying metastructures have attracted a lot of research interest in recent years. On the other hand, digital programmable metasurfaces also gained great attention owing to their powerful capabilities controlling electromagnetic (EM) fields waves real time, which is very suitable for implementing spatiotemporal modulations manner. Accordingly, space-time-coding (STC)...

Path generation in Cartesian space is discussed and the idea of using lines and arcs to create general paths is presented. To make smooth paths in Cartesian space zones are introduced and two different ways to interpolate zones are given. An algorithm for transforming a Cartesian path into a cubic spline representation in joint space is presented and also evaluated in an example. An important a...

A large and clearly visible operating area is essential for successful arthroscopic surgery of the temporomandibular joint. The keys to a successful operation are the safe and accurate positioning of a large scope and multiple cannulations, overcoming blind areas. We developed some instruments to resolve these problems; i.e., scopes with a large diameter for high resolution, a triangulation ins...