Method for overflow testing of a blind equalizer

A method for overflow testing of a blind equalizer, the blind equalizer adapting an input signal by adjusting a plurality of tap weights in the blind equalizer, the method comprising the steps of:

• providing a primary located signal in a primary signaling point of a period by a signal generating loop;
• multiplying the primary located signal by a set of continuously decreasing signals to get a primary signal;
• providing an interfering located signal in a plurality of interfering signaling points of the period by an ISI generating loop, wherein the interfering signaling points are different from the primary signaling point;
• multiplying the interfering located signal by a set of continuous signals to get an interference signal;
• adding the primary signal and the interference signal to get the input signal;
• and
• inputting the input signal to the blind equalizer to adapt the input signal, wherein the tap weights corresponding to the interference signal in the blind equalizer overflow;
• wherein an initial status of the ISI generating loop is determined by a slicing level of a slicer, amplitudes of the primary signal after the blind equalizer are larger than the slicing level and amplitudes of the interference signal after the blind equalizer are smaller than the slicing level.