Time-modulated Ultra-wide band communications scheme

Can anybody tell me what is Time-modulated Ultra-wide band communications scheme and whether i can use it in accurate position tracking for a room-navigator.

Thanks a lot!

Check this very nice paper
http://www.tml.hut.fi/Studies/T-110....lacu_mihai.pdf

PPM is a typical time modulation method. Use google, you can get a lots of results

you can use the polarization modulation technology,this is very high speed modulation technology for UWB

Thanks for your reply!
Can anyone tell how this technology works in finding precise location of an object.

Check www.aetherwire.com for UWB localization, or just type "UWB localization" at Google or Yahoo search for more information.

D.

Has anyone worked with Time-modulated Ultra-wide band communications scheme in an enclosed area like office?
I need more info for the same.
Thanks a lot