UWB (Ultra Wide Band) waveform design to minimize narrowband...

Multiplex communications – Communication over free space – Combining or distributing information via code word channels...

Reexamination Certificate

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Reexamination Certificate

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07554965

ABSTRACT:
UWB (Ultra Wide Band) waveform design to minimize narrowband interference. A novel solution is presented such that a PN (Pseudo-Noise) code may be intelligently designed so as to null portions of a UWB spectrum that have a significant amount of noise. These narrowband blocking intervals will effectively block off all of the interference within these portions of the UWB signal. These spectrum portions having interference may be predetermined beforehand or determined by one or more of the devices within the communication system; in addition, any changes in the interference may also be assessed in real time or successively (e.g., after the elapse of every predetermined period of time). Moreover, the position of the devices within the communication system may also be employed when selecting the nulling codes, and they may be adaptively changed, in real time, to respond to changes in the interference and/or changes in the devices' positions.

REFERENCES:
patent: 6603818 (2003-08-01), Dress et al.
patent: 6697628 (2004-02-01), Green et al.
patent: 7149529 (2006-12-01), Parry
patent: 7184787 (2007-02-01), Mallette
patent: 2004/0008641 (2004-01-01), Sugaya et al.
patent: 2004/0048574 (2004-03-01), Walker et al.
Federal Communications Commission (FCC), “FCC 02-48”, Feb. 14, 2002, Revision of Part 15 of the Commission's Rules Regarding Ultra-Wideband Transmission Systems.

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