Methods, apparatus and computer programs for signal interference ratio estimation

摘要

Methods, apparatus and computer programs are provided for performing signal interference ratio estimation with respect particularly to non-constant modulus data. A method is provided that includes causing one or more data symbols to be demodulated resulting in one or more soft bits. An estimate is determined for a second order moment and a fourth order moment for the one or more soft bits. A signal to noise ratio is determined based on a signal component and a noise component of the estimated second order moment and the estimated fourth order moment for the one or more soft bits.