Clock recovery for a data receiving unit

A clock recovery apparatus for a data receiving unit, comprising:

• an early/late aggregation block configured to obtain an early/late signal from an incoming data stream, wherein the early/late signal indicates whether a set of one or more data samples of the incoming data stream tends to be earlier or later than an edge of a phase-rotated clock signal provided depending on a phase offset value, and
• a phase rotation counter block configured to update a phase rotation counter value in response to the early/late signal, configured to determine the phase rotation counter value, and configured to determine the phase offset value depending on a rounded phase rotation counter value;
• and
• a look-ahead unit configured to determine the phase offset value by selecting one of the set of options including maintaining, increasing or decreasing the rounded phase rotation counter value wherein the selecting is performed depending on the early/late signal and depending on the phase rotation counter value.

A method of clock recovery for a data receiving unit, comprising:

• receiving an early/late signal from an incoming data stream, wherein the early/late signal indicates whether a set of one or more data samples of the incoming data stream is earlier than or later than an edge of a phase-rotated clock signal, the phase-rotated clock signal provided depending on a phase offset value;
• updating a phase rotation counter value in response to receiving the early/late signal;
• determining a rounded phase rotation counter value depending on the phase rotation counter value and the early/late signal;
• and
• determining the phase offset value depending on the rounded phase rotation counter value.