Data rate acquisition using signal edges
First Claim
1. A method for detecting a data rate in a data signal of an asynchronous data transmission system, in which asynchronous data transmission system a bit is transmitted in the form of a signal edge generated at a particular nominal time, the method comprising:
- a) detection of the times of occurrence of signal edges;
b) determination of edge intervals by means of the detected times of occurrence of signal edges, c) determination of a mean edge interval by averaging the determined edge intervals, d) determination of a lower time of occurrence limit and an upper time of occurrence limit from the determined mean edge interval and a tolerance range of the determined mean edge interval in relation to a preceding signal edge, and e) checking the occurrence of a subsequent signal edge in relation to the lower time of occurrence limit and the upper time of occurrence limit.
2 Assignments
0 Petitions
Accused Products
Abstract
In a method for detecting a varying data rate in a data signal, with which data signal a bit is transmitted in the form of a signal edge generated at a particular nominal time, after triggering by an interrupt signal (IS) generated in an analog/digital converter (13), the times of occurrence (TA, TB, TC, TD) of the signal edges are detected and subsequently the edge intervals (T1, T2) determined from the times of occurrence (TA, TB, TC, TD) of the signal edges and subsequently the mean edge interval (Tm) determined from the determined edge intervals (T1, T2). From the mean edge interval (Tm) and a tolerance range of the mean edge interval (Tm) are determined an upper time of occurrence limit (OAZ) and a lower time of occurrence limit (UAZ), within which upper and lower time of occurrence limit a subsequent signal edge must occur in order to be valid for the detection of a current data rate from the mean edge interval (Tm).
28 Citations
15 Claims
-
1. A method for detecting a data rate in a data signal of an asynchronous data transmission system, in which asynchronous data transmission system a bit is transmitted in the form of a signal edge generated at a particular nominal time, the method comprising:
-
a) detection of the times of occurrence of signal edges;
b) determination of edge intervals by means of the detected times of occurrence of signal edges, c) determination of a mean edge interval by averaging the determined edge intervals, d) determination of a lower time of occurrence limit and an upper time of occurrence limit from the determined mean edge interval and a tolerance range of the determined mean edge interval in relation to a preceding signal edge, and e) checking the occurrence of a subsequent signal edge in relation to the lower time of occurrence limit and the upper time of occurrence limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A communication station comprising data rate detection means for detecting a data rate in a data signal of an asynchronous data transmission system, in which system a bit is transmitted in the form of a signal edge generated at a particular nominal time, which data rate detection means comprises:
-
a) detection means for detecting the times of occurrence of signal edges, b) first determination means for determining edge intervals by means of the detected times of occurrence of signal edges, c) second determination means for determining a mean edge interval by averaging the determined edge intervals, d) third determination means for determining a lower time of occurrence limit and an upper time of occurrence limit from the determined mean edge interval and a tolerance range of the determined mean edge interval in relation to a preceding signal edge, and e) check means for checking the occurrence of a subsequent signal edge in relation to the lower time of occurrence limit and the upper time of occurrence limit. - View Dependent Claims (11)
-
-
12. Data rate detection means for detecting a data rate in a data signal of an asynchronous data transmission system, in which system a bit is transmitted in the form of a signal edge generated at a particular nominal time, which data rate detection means comprises:
-
a) detection means for detecting the times of occurrence of signal edges, b) first determination means for determining edge intervals by means of the detected times of occurrence of signal edges, c) second determination means for determining a mean edge interval by averaging the determined edge intervals, d) third determination means for determining a lower time of occurrence limit and an upper time of occurrence limit from the determined mean edge interval and a tolerance range of the determined mean edge interval in relation to a preceding signal edge, and e) check means for checking the occurrence of a subsequent signal edge in relation to the lower time of occurrence limit and the upper time of occurrence limit. - View Dependent Claims (13, 14, 15)
-
Specification