Method and Arrangement in Wireless Communications System

A method of adjusting a frequency domain channel estimate in a receiving node of a wireless communication system using Orthogonal Frequency Division Multiplexing, the method comprising:

• estimating a phase rotation of the frequency domain channel estimate;
• compensating for the estimated phase rotation in the frequency domain channel estimate;
• transforming the compensated frequency domain channel estimate into a time domain channel estimate;
• filtering the time domain channel estimate to suppress noise;
• transforming the filtered time domain channel estimate into a noise suppressed frequency domain channel estimate;
• and
• adding the estimated phase rotation to the noise suppressed frequency domain channel estimate to achieve an adjusted frequency domain channel estimate.

A receiving node for a wireless communication system using Orthogonal Frequency Division Multiplexing, the receiving node configured to adjust a frequency domain channel estimate and comprising:

• an estimating unit adapted to estimate a phase rotation of the frequency domain channel estimate;
• a compensating unit adapted to compensate for the estimated phase rotation in the frequency domain channel estimate;
• a first transforming unit adapted to transform the compensated frequency domain channel estimate into a time domain channel estimate;
• a filtering unit adapted to filter the time domain channel estimate to suppress noise;
• a second transforming unit adapted to transform the filtered time domain channel estimate into a noise suppressed frequency domain channel estimate;
• and
• an adding unit adapted to add the estimated phase rotation to the noise suppressed frequency domain channel estimate to achieve an adjusted frequency domain channel estimate.