Signal processing method and device for a memory system interface circuit

Abstract

A signal processing method for a memory system interface circuit is provided. The memory system interface circuit comprises at least one signal pin each being configured to receive a transmission signal via an individual signal link and to generate a received signal at a receiving node of the signal link. The signal processing method comprises: pre-processing the received signal to obtain an input signal; removing a weighted feedback signal from the input signal to obtain an output signal, wherein the weighted feedback signal is provided by a finite impulse response (FIR) filter in a feedback path; deciding on the output signal based on a predetermined base signal to generate a digital output signal; weighting, on a scale of a filter coefficient matrix of the FIR filter, the digital output signal to obtain the weighted feedback signal; comparing the output signal with a reference signal to generate an error signal; and determining a set of optimal filter coefficients of the filter coefficient matrix of the FIR filter and the reference signal according to correlation between the digital output signal and the error signal, to minimize inter-symbol interference (ISI) of the received signal introduced by transmission characteristics of the signal link.