Pulse or digital communications – Receivers – Automatic baseline or threshold adjustment
Patent
1997-03-06
1999-04-20
Tse, Young T.
Pulse or digital communications
Receivers
Automatic baseline or threshold adjustment
375355, H04L 2506
Patent
active
058964223
ABSTRACT:
A method for setting a bit determination threshold for determining the logic state of a bit in a data bit stream of an NRZ (non-return-to-zero) signal in a GMSK (gaussian minimum shift keying) communication system includes the step of sensing the occurrence of a "flat top" bit in the data bit stream, which signifies the occurrence of a first string of successive same state bits in the data bit stream, where the bits are in a first logic state, such as logic 1. The average bit amplitude of the information signal corresponding to the "flat top" bit of the first string is determined. The occurrence of a second "flat top" bit in the data bit stream which signifies the occurrence of a second string of successive same state bits which are of an opposite logic state, such as logic 0, is then sensed, and the average bit amplitude of the second "flat top" bit of the second string is determined. The average bit amplitude of the first "flat top" bit of the first string is averaged with the average bit amplitude of the second "flat top" bit of the second string to determine a threshold level which is used in setting a bit determination threshold. A circuit for carrying out this method may be in the form of a programmable DSP (digital signal processor).
REFERENCES:
patent: 4242755 (1980-12-01), Gauzan
patent: 4567602 (1986-01-01), Kato et al.
patent: 5052021 (1991-09-01), Goto et al.
patent: 5671256 (1997-09-01), Clark et al.
Tse Young T.
Uniden San Diego Research and Development Center Inc.
LandOfFree
Method and apparatus for determining the detection threshold for does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for determining the detection threshold for, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining the detection threshold for will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2253402