Method for synchronization of a clock signal, which can be generated in a data receiving station, with a clock signal which is used in a data transmission station

An improved method for synchronization of a first clock signal generated in a data receiving station with a second clock signal used in a data transmitting station, the improvement which comprises:

• transmitting timemark data representing a count dependent on a frequency of the second clock signal from the data transmitting station to the data receiving station;
• evaluating a value and a time of reception of the timemark data in the data receiving station;
• forming in the data receiving station estimated values based on both current timemark data and previously received timemark data and the estimated values representing a parameter characterizing the frequency of the second clock signal of the data transmitting station;
• forming a calculated parameter by a calculation based on the current timemark data of the parameter characterizing the frequency of the second clock signal, and filtering the calculated parameter using an adaptive filter for forming the estimated values;
• and
• triggering a clock signal generator to produce the first clock signal to be synchronized to the second clock signal on a basis of the estimated values.

An improved method for synchronization of a first clock signal generated in a data receiving station with a second clock signal used in a data transmitting station, the improvement which comprises:

• transmitting timemark data representing a count dependent on a frequency of the second clock signal from the data transmitting station to the data receiving station;
• evaluating a value and a time of reception of the timemark data in the data receiving station;
• forming in the data receiving station estimated values based on both current timemark data and previously received timemark data and the estimated values representing a parameter characterizing the frequency of the second clock signal of the data transmitting station;
• using an algorithm allowing recursive estimated value determinations for at least partially determining the estimated values;
• and
• triggering a clock signal generator to produce the first clock signal to be synchronized to the second clock signal on a basis of the estimated values .