What are the key co-existence features of a MB-OFDM based UWB system when they are in presence of systems with in-band and neighboring frequency spectrum usage?
MB-OFDM based systems will be fully regulatory spectrum compliant. Since the bands and tones are created digitally, there is much better control of the frequency spectrum and having 4MHz tones provides steep falloff of the bands thus providing no discernible signals out of band definitely well below the FCC requirements. In the bands such systems like GPS and PCS use, the noise level are dominated by the usual background noise. The U-NII band where the 802.11a resides, the MB-OFDM does not have any signal energy; this band is avoided specifically to protect UWB receivers when the two radios co-exist on the same system are close in proximity of each other. If there are regions in the world areas, that implement a different spectrum mask, the MB-OFDM based system can easily be adapted in those regions and would avoid interference by turning off tones or bands in these spectrum locations.
