Blind SNR estimation

Computer program for estimating the signal to noise ratio (γ) of a modulated communication signal (rn) to noise ratio (=SNR) (γ) of a modulated communication signal (rn) including a data symbol component (sn) and a noise component (nn), wherein an intermediate SNR value ({circumflex over (γ)}RDA) of the modulated communication signal is derived from a data assisted maximum-likelihood estimation, the assisting data not being known in advance but being reconstructed from samples of the modulated communication signal (rn), and that an estimated SNR value ({circumflex over (γ)}RDA-ER) is determined by a controlled non-linear conversion of the intermediate SNR value ({circumflex over (γ)}RDA).

Receiver system for estimating the signal to noise ratio (γ) of a modulated communication signal (rn) to noise ratio (=SNR) (γ) of a modulated communication signal (rn) including a data symbol component (sn) and a noise component (nn), wherein an intermediate SNR value ({circumflex over (γ)}RDA) of the modulated communication signal is derived from a data assisted maximum-likelihood estimation, the assisting data not being known in advance but being reconstructed from samples of the modulated communication signal (rn), and that an estimated SNR value ({circumflex over (γ)}RDA-ER) is determined by a controlled non-linear conversion of the intermediate SNR value ({circumflex over (γ)}RDA).

Apparatus, in particular a base station or a mobile station, comprising a computer program for estimating the signal to noise ratio (γ) of a modulated communication signal (rn) to noise ratio (=SNR) (γ) of a modulated communication signal (rn) including a data symbol component (sn) and a noise component (nn), wherein an intermediate SNR value ({circumflex over (γ)}RDA) of the modulated communication signal is derived from a data assisted maximum-likelihood estimation, the assisting data not being known in advance but being reconstructed from samples of the modulated communication signal (rn), and that an estimated SNR value ({circumflex over (γ)}RDA-ER) is determined by a controlled non-linear conversion of the intermediate SNR value ({circumflex over (γ)}RDA).

Apparatus, in particular a base station or a mobile station, comprising a receiver system for estimating the signal to noise ratio (γ) of a modulated communication signal (rn) to noise ratio (=SNR) (γ) of a modulated communication signal (rn) including a data symbol component (sn) and a noise component (nn), wherein an intermediate SNR value ({circumflex over (γ)}RDA) of the modulated communication signal is derived from a data assisted maximum-likelihood estimation, the assisting data not being known in advance but being reconstructed from samples of the modulated communication signal (rn), and that an estimated SNR value ({circumflex over (γ)}RDA-ER) is determined by a controlled non-linear conversion of the intermediate SNR value ({circumflex over (γ)}RDA).