Author:Herselman, PLR; Cilliers, Jacques EDate:Sep 2007In modern information and sensor systems, the timely estimation of the carrier frequency of received signals is of critical importance. This paper presents a digital instantaneous frequency measurement (DIFM) technique, which can measure the ...Read more
Author:Simmat, CM; Herselman, PLR; Rutschlin, M; Mason, IM; Cloete, JHDate:Mar 2006The planar, 80 cm thick, lousy dielectric reefs of the Bushveld are embedded in rocks that are almost transparent at ground penetrating radar frequencies of 10–125 MHz. Pothole sensing practices are based largely on using borehole radars to ...Read more