MB-OFDM-UWB

I want to simulate a MB-OFDM-UWB system in Matlab. I did pure OFDM system
before which consist of convolution code block, modulation block, FFT
block, Cyclic Prefix block, multipath block and corresponding receiver
blocks. However, how to modify them to a MB-OFDM-UWB system, what kind of
block I need to add into? thank!

someone help with it?