Equalizer and method applied thereto

An equalizer, comprising:

• a first feed-forward equalization module, for receiving an input real-part component signal of a complex input signal and for equalizing the input real-part component signal to generate a first real-part component signal;
• a second feed-forward equalization module, for receiving an input imaginary-part component signal of the complex input signal and for equalizing the input imaginary-part component signal to generate a first imaginary-part component signal;
• and
• a phase error corrector, coupled to an output of the first feed-forward equalization module and an output of the second feed-forward equalization module, for adjusting a complex phase corresponding to the first real-part component signal and the first imaginary-part component signal to generate a second real-part component signal and a second imaginary-part component signal according to a phase error information and
• a first operator, coupled to the phase error corrector, for performing an operation on the second real-part component signal and a third real-part component signal to generate an output real-part component signal;
• a slicer, coupled to the first operator, for performing a hard decision on the output real-part component signal to generate a detecting result;
• and
• a feedback equalization module, coupled to the slicer and the first operator, for equalizing the detecting result to generate the third real-part component signal.