Method and apparatus for phase noise mitigation

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code for one or more programs,
• the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following,
• determine a received signal includes phase noise comprising at least a common phase error component and an inter-carrier-interference component;
• cause, at least in part, the common phase error to be corrected based, at least in part, on one or more pilot carriers;
• cause, at least in part, an estimate of a main signal component to be subtracted from the one or more pilot carriers;
• determine a sequence of estimated coefficients of a multiplicative phase noise sequence, wherein the determination of the sequence of estimated coefficients comprises processing an estimated value of a first coefficient of the sequence of estimated coefficients to produce a result based on the first coefficient and subtracting the result when estimating a next coefficient of the sequence of estimated coefficients to hone in on an estimated value of the next coefficient;
• cause, at least in part, the inter-carrier-inference to be corrected by processing the multiplicative phase noise sequence using the sequence of estimated coefficients;
• and
• cause, at least in part, an equalized data signal to be output based, at least in part, on the corrected common phase error and the corrected inter-carrier-interference.

A non-transitory computer-readable storage medium carrying one or more sequences of one or more instructions which, when executed by one or more processors, cause an apparatus to:

• determine a received signal includes phase noise comprising at least a common phase error component and an inter-carrier-interference component;
• cause, at least in part, the common phase error to be corrected based, at least in part, on one or more pilot carriers;
• cause, at least in part, an estimate of a main signal component to be subtracted from the one or more pilot carriers;
• determine a sequence of estimated coefficients of a multiplicative phase noise sequence, wherein the determination of the sequence of estimated coefficients comprises processing an estimated value of a first coefficient of the sequence of estimated coefficients to produce a result based on the first coefficient and subtracting the result when estimating a next coefficient of the sequence of estimated coefficients to hone in on an estimated value of the next coefficient;
• cause, at least in part, the inter-carrier-inference to be corrected by processing the multiplicative phase noise sequence using the sequence of estimated coefficients;
• and
• cause, at least in part, an equalized data signal to be output based, at least in part, on the corrected common phase error and the corrected inter-carrier-interference.