Based on the principle of digital orthogonal modulation, the generation question of wide-band signal is factually identical with how to generate base-band signal with high sampling in time domain.

Any Doppler drift in the signal would fall within this wide band anyway and will form part of the total signal.

The receive technology of Ultra-Wide Band (UWB) signal is one of the key technologies of high-speed receiver. Quadrature receiver is typical scheme in high- speed receiver.