Hardware channel model for ultra wideband systems

We present a digital hardware model for ultra wideband channels. The system runs at 80 MHz on a Xilinx Virtex-4 xc4vsx35 FPGA. High-speed arithmetic operations including division, square root, powering and normal random number generator are analyzed and developed for use as basic components in the channel emulator. The design flow is based on Matlab Simulink as the model builder, followed by Xilinx System Generator to transform the Simulink model into a VHDL description which can be synthesized and mapped onto the FPGA device. Speed and area results are given for the synthesized designs