Pulse or digital communications – Spread spectrum – Frequency hopping
Reexamination Certificate
2005-08-30
2005-08-30
Ha, Dac V. (Department: 2634)
Pulse or digital communications
Spread spectrum
Frequency hopping
C375S138000, C375S149000, C375S239000, C375S256000, C342S018000, C342S044000, C342S386000
Reexamination Certificate
active
06937639
ABSTRACT:
A system, method and computer program product for positioning pulses, including positioning pulses within a specified time layout according to one or more codes to produce a pulse train having one or more predefined spectral characteristics where a difference in time position between adjacent pulses positioned to produce a spectral characteristic differs from another difference in time position between other adjacent pulses positioned to produce the spectral characteristic. The present invention may include shaping a code spectrum according to a spectral template in order to preserve a pre-defined code characteristic. A pre-defined code characteristic can include desirable correlation, or spectral properties. A transmitter incorporating the present invention can avoid transmitting at a particular frequency. Similarly, a receiver can avoid interference with a signal transmitting at a particular frequency. A radar system, can avoid a radar jammer attempting to jam a particular frequency.
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“ET Docket 98-153, In the Matter of Revision of Part 15 of the Commissions' Rules Regarding Ultra-Wideband Transmission Systems—Comment on Notice of Proposed Rulemaking FCC 00-163 adopted: May 10, 2000”, Addressed to: the Commission, regarding comments of: Aether Wire & Location, Inc.
Pendergrass Marcus H.
Roberts Mark D.
Babayi Robert
Ha Dac V.
Time Domain Corporation
Venable LLP
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