A channel frequency response estimator for estimating the channel frequency response of a wireless RF channel having a time- or frequency varying channel frequency response, the channel frequency response estimator comprising: a wireless receiver configured to receive a wireless RF signal and obtaining therefrom a stream of received signals corresponding to a stream of information encoding symbols, the stream of information encoding symbols being encoded into the wireless RF signal by modulating at least the phase of a carrier signal, - an ambiguous channel frequency response estimator configured to establish, from at least a first received signal of the stream of received signals, multiple channel frequency response estimate candidates for the channel frequency response of the channel during the transmission of the first received signal over the channel, - an ambiguity resolver configured to select a first channel frequency response estimate from the multiple channel frequency response estimate candidates that maximizes a goodness of fit of the selected first channel frequency response estimate and at least two further channel frequency response estimates to a channel model, the channel model modeling the time- or frequency dependent variance of the channel frequency response, the at least two further channel frequency response estimates being estimates for the channel frequency response of the channel during transmission of at least two further received signals of the stream of received signals adjacent in time to the first received signal, the channel frequency response estimator being characterized in that establishing by said ambiguous channel frequency response estimator multiple channel frequency response estimate candidates from at least the first received signal comprises establishing a channel magnitude estimate from at least the magnitude of the first received signal, and establishing multiple channel offset estimate candidates by comparing the phase of the first received signal with the phases of the constellation points from which the information encoding symbols in the stream of information encoding symbols were selected. a wireless receiver configured to receive a wireless RF signal and obtaining therefrom a stream of received signals corresponding to a stream of information encoding symbols, the stream of information encoding symbols being encoded into the wireless RF signal by modulating at least the phase of a carrier signal, - an ambiguous channel frequency response estimator configured to establish, from at least a first received signal of the stream of received signals, multiple channel frequency response estimate candidates for the channel frequency response of the channel during the transmission of the first received signal over the channel, - an ambiguity resolver configured to select a first channel frequency response estimate from the multiple channel frequency response estimate candidates that maximizes a goodness of fit of the selected first channel frequency response estimate and at least two further channel frequency response estimates to a channel model, the channel model modeling the time- or frequency dependent variance of the channel frequency response, the at least two further channel frequency response estimates being estimates for the channel frequency response of the channel during transmission of at least two further received signals of the stream of received signals adjacent in time to the first received signal, the channel frequency response estimator being characterized in that