Modeling and Implementing for Mobile Radio Fading Channel in IF Based on FPGA

A device based in Field Programmable Logic Array(FPGA)to simulate the channel propagation characteristics of the ground mobile environment at Inter Frequency (IF) has been designed and implemented.This device allows the performance of a mobile radio unit to be evaluated in laboratory under controlled conditions. The adjustable fading bandwidths and additional long delays were implemented by using the relative new signal processing technologies of FPGA device. A typical model to simulate the multi-path effects up to three different propagation paths was introduced , more paths' simulation can be implemented by increasing the number of same units. The channel simulator was designed to simulate mobile platform speeds up to 120km/h and multi-path components, having calculated time delay spreads of up to 9 μs.