In this letter we investigate a communication strategy for digital ultra-wi
de bandwidth impulse radio, where the separation between the adjacent pulse
s is chaotic arising from a dynamical system with irregular behavior. A pul
se position method is used to modulate binary information onto the carrier.
The receiver is synchronized to the chaotic pulse train, thus providing th
e time reference for information extraction. We characterize the performanc
e of this scheme in terms of error probability versus E-b/N-o by numericall
y simulating its operation in the presence of noise and filtering.