Ultra-Wideband Direct Sequences Code Division Multiple Access (DS-DMA) plays
an important role in the case of multi-terminal multi-application
communications of UWB devices. In the case of UWB systems that exploit the
injection of the pulse itself directly to the antenna hence the very wide
bandwidth, generation of suitable DS-CDMA codes poses a real challenge. In
this paper we will describe our novel UWB transmission which uses
pseudo-orthogonal time code (POC) as DS-CDMA sequences. The suggested codes
are unipolar sequences with chips that may be dynamically modified to target
a certain number of users or applications. Our approach bypasses the
modulations schemes commonly used on UWB systems. Moreover, as perspectives
to our work, it would be very interesting to realize our new approach based
on an FPGA circuit.