Equalization enhancing module, demodulation system and equalization enhancing method

A demodulation system, comprising:

• an equalization module, equalizing a plurality of reception signals to generate a plurality of equalized signals;
• a symbol determining module;
• and
• an equalization enhancing module, coupled between the equalization module and the symbol determining module, comprising:
• a multiplication unit, multiplying a plurality of equalized signals by a scaling coefficient to obtain a plurality of scaled signals;
• a determination unit, coupled to the multiplication unit, determining whether the plurality of scaled signals are located in a predetermined region to generate a plurality of determination results;
• a ratio calculating unit, coupled to the determination unit, calculating an inner ratio according to the plurality of determination results;
• a coefficient calculating unit, coupled to the ratio calculating unit, calculating the scaling coefficient according to the inner ratio;
• wherein, the symbol determining module demodulates the plurality of scaled signals.

An equalization enhancing method, capable of enhancing performance of a demodulation system, comprising:

• multiplying a plurality of equalized signals by a scaling coefficient to obtain a plurality of scaled signals;
• determining whether constellation points corresponding to the plurality of scaled signals are located in a predetermined region to generate a plurality of determination results;
• calculating an inner ratio according to the plurality of determination results, wherein the inner ratio is associated with a ratio of the plurality of scaled signals located in the predetermined region;
• and
• calculating the scaling coefficient according to the inner ratio to cause the inner ratio to approximate a predetermined ratio.