Method for processing an analog signal coming from a transmission channel, in particular a signal carried by power line communications

A receiver, comprising:

• an analog input stage configured to be coupled to a transmission channel and configured to deliver an analog signal from the transmission channel, the analog input stage comprising at least one analog filter;
• an analog-to-digital convertor configured to convert the analog signal into a digital signal;
• a downsampling circuit configured to undersample the digital signal to produce a channel digital signal;
• a digital filter configured to determine, in real time, a plurality of coefficients of a predictive filter from an autoregressive model of the channel digital signal, the digital filter being further configured to filter the channel digital signal, based upon the plurality of coefficients, to provide a filtered digital signal;
• and
• a detector configured to detect at least one indication for at least one location in a frame structure of the analog signal to be identified based upon the filtered digital signal and a reference signal.

A receiver, comprising:

• an input stage configured to receive an electrical power line analog signal comprising a useful signal modulated on a sub-set of carriers from a plurality of available carriers, the useful signal carrying at least one frame of symbols according to a frame structure, the useful signal susceptible to noise;
• an analog-to-digital conversion stage configured to perform an analog-to-digital conversion of the electrical power line analog signal into a digital signal;
• a downsampling circuit configured to undersample the digital signal to produce a channel digital signal;
• a digital filter configured to determine, in real time upon reception of the channel digital signal, a plurality of coefficients of a predictive filter from an autoregressive model of the channel digital signal, the digital filter being further configured to filter the channel digital signal, based upon the plurality of coefficients, to provide a filtered digital signal;
• and
• a detector configured to detect at least one indication for at least one location in the frame structure to be identified based upon the filtered digital signal and a reference signal.