Adaptive filtering for precision time protocol with physical layer support

A device that implements adaptive filtering to reduce packet delay variation impact, the device comprising:

• a physical layer configured to receive packet data from a network;
• and
• a microcontroller configured to be in communication with the physical layer, the microcontroller being configured to:
• receive a sequence of phase offsets determined by the device over time;
• form a metric vector based on a set of elements sampled from a metric associated with a portion of phase offsets among the sequence of phase offsets;
• determine a weight vector based on the metric vector;
• and
• adjust a set of filter coefficients based on the weight vector, wherein the set of filter coefficients are filter coefficients of a filter being implemented by the device to filter packet data received by the physical layer.

A method for performing adaptive filtering to reduce phase delay variation impact, the method comprising:

• receiving a sequence of phase offsets determined by a slave device over time;
• forming a metric vector based on a set of elements sampled from a metric associated with a portion of phase offsets among the sequence of phase offsets;
• determining a weight vector based on the metric vector;
• and
• adjusting a set of filter coefficients based on the weight vector, wherein the set of filter coefficients are filter coefficients of a filter being implemented by the slave device to filter incoming packet data.