Pulse or digital communications – Miscellaneous
Patent
1998-12-01
2000-12-19
Heckler, Thomas M.
Pulse or digital communications
Miscellaneous
710 60, 375225, H04L 2300, H04B 346
Patent
active
061635863
ABSTRACT:
An autobaud method for automatic detection of baud rate and character configuration of a received asynchronous serial data stream by detecting a first predetermined two character sequence in uppercase and lowercase form, notably "AT" and "at", from patterns of signal states and their durations, also provides for detecting a second predetermined two character sequence of "A/" and "a/" and for substantially immediate automatic echoing of the first and second predetermined character sequences if autoechoing is enabled. The baud rate and character configuration used for subsequent characters is not be changed unless, after the autobaud function is enabled, the first predetermined two character sequence in either uppercase or lowercase form is received, and a different baud rate and/or character configuration is determined from the received pattern of signal states and their durations. The baud rate is determined by measuring the duration of a signal state begun by an apparent transition from a stop bit or idle state, and determining whether the measured duration falls within any of a set of predetermined bit time ranges or legal windows, each corresponding to a different baud rate of a set of predetermined standard baud rates.
REFERENCES:
patent: 3747074 (1973-07-01), Schulze
patent: 5008902 (1991-04-01), Key et al.
patent: 5206888 (1993-04-01), Hiraguchi et al.
patent: 5222081 (1993-06-01), Lewis et al.
patent: 5627858 (1997-05-01), Mak et al.
patent: 5654983 (1997-08-01), Sauser, Jr.
patent: 5982837 (1999-11-01), Earnest
Hongbin Hao Jerry
Kolb Bill
Heckler Thomas M.
Philips Electronics North America Corp.
Slobod Jack D.
LandOfFree
Autobaud/autoecho method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Autobaud/autoecho method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Autobaud/autoecho method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-276568