Abstract: A method and wireless receiver for determining a modulation format of a transmitted signal from a received signal over a multipath channel are disclosed. The received signal has a frequency offset with respect to the transmitted signal. The wireless receiver down-samples the received signal. The down-sampled signal is equalized in order to mitigate an effect of multipath channel. Then the wireless receiver applies differential processing on the equalized signal to convert the frequency offset into a constant phase offset. Thereafter, values of one or more moment based features for the equalized signal are determined by the wireless receiver. The modulation format of the received signal is then determined based on the values of one or more moment based features.