1. A method of processing two or more received multipath signals comprising at least a first signal and a second signal, each of the first and second signals including possible multipath interference, the method comprising: measuring correlations of signal impairments, each associated with the first and second signals; jointly estimating values of fitting parameters in response to the measurements of correlations of signal impairments associated with each of the first and second signals; and estimating received signal impairment correlations for each of the first and second signals by applying the estimated values of the fitting parameters.