1. A method of interference rejection combining (IRC) for mitigating interference in received signals in the frequency domain for a telecommunication system, the method comprising: selecting a sub-group of frequencies of a received signal; determining a joint representation of a covariance matrix for the interference plus noise for a plurality of time slots of the received signal for the selected sub-group of frequencies, the plurality of time slots comprising an entire sub-frame of the received signal for the selected sub-group of frequencies; determining a channel estimate based on two successive pilot symbols of said sub-frame; determining IRC coefficients in the frequency domain for each symbol of said sub-frame based on said determined joint representation of the covariance matrix and said determined channel estimate.