Pulse or digital communications – Testing – Data rate
Patent
1995-12-08
1998-03-03
Tse, Young T.
Pulse or digital communications
Testing
Data rate
375340, H04B 1702
Patent
active
057243891
ABSTRACT:
A method and apparatus detects (516) a baud rate in a digital signal (442). An N-state counter (404) counts at a rate N times the baud rate and the digital signal is sampled (504) to detect transitions of the digital signal. N tallies (202) record how many transitions occur coincident with each of the states of the counter, and a total number of transitions detected is computed (508). M groups (204-210) of the tallies are formed (510) corresponding to contiguous sequential states of the counter, and for each group a group number is calculated (512) indicating how many transitions are recorded in the tallies of the group. Each group is defined (514) transitional if the group number exceeds a percentage (413) of the total number of transitions, and the baud rate is determined present or absent based upon the groups that are defined as transitional.
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Marko Paul
Rindsberg Mark
Shor Motty
Wadin Craig
Breeden R. Louis
Chanroo Keith A.
Motorola Inc.
Tse Young T.
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