Flexible, Low Cost, Automatic Emulator for Channel Characterization of Wireless and Satellite Systems

Abstract

Actually there is a great increase in the develop of microwave land mobile communications system like Iridium, Globalstar, I C 0 and others. This new systems are based on the use of constelation of satellites with low and medium orbit ( LEO, MEO) which has propagation effects like strong doppler shifts or long delaies that require countermeasurements and must also be able to work in many differents enviroments and conditions, so that more powerful1 tools and new equipments will be required to verify the behaivour of this systems before and after their implantation.