Pulse or digital communications – Spread spectrum – Frequency hopping
Reexamination Certificate
2005-10-11
2005-10-11
Ha, Dac V. (Department: 2634)
Pulse or digital communications
Spread spectrum
Frequency hopping
C375S138000, C375S265000, C375S341000, C370S330000, C370S478000
Reexamination Certificate
active
06954482
ABSTRACT:
A method and system begin at a random node of a trellis model having a set of at least two axes, wherein one axis corresponds to time and a second axis corresponds to frequency, a set of M states, corresponding to a set of all possible frequencies that may be transmitted by the system, and branches leaving each state, that terminate at allowable transmit frequencies for a next frequency hop. The number of branches leaving each state is dependent on the number of encoded bits per hop. Next, B bits of data are passed to a buffer, where B is the number of bits that will be transmitted per frequency hop. The method and system then combine the B bits of data with information for previously selected frequencies to select a current frequency, transmit the selected frequency, and feedback the currently selected frequency information to be used as previously selected frequency information when selecting a next frequency.
REFERENCES:
patent: 5193102 (1993-03-01), Meidan et al.
patent: 5483550 (1996-01-01), Hulbert
patent: 6240073 (2001-05-01), Reichman et al.
patent: 6345073 (2002-02-01), Curry et al.
PCT International Search Report dated Jan. 12, 2005 of International Application No. PCT/US04/12483 filed Apr. 21, 2004.
Edelson Geoffrey S.
Herrick David L.
Mills Diane G.
Myers Cory S.
BAE Systems Information and Electronic Systems Integration Inc.
Ha Dac V.
Haley Barry L.
Long Daniel J.
LandOfFree
Soft-decision trellis-coded differential frequency-hopped... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Soft-decision trellis-coded differential frequency-hopped..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft-decision trellis-coded differential frequency-hopped... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3454075