Adaptive equalization method and apparatus for probabilistic shaping system, and readable storage medium

An adaptive equalization apparatus for a probabilistic shaping system, comprising:

• a processor;
• and
• a memory configured to store a computer program which, when executed by the processor, causes the processor to perform an adaptive equalization apparatus for a probabilistic shaping system method comprising:
• determining a tap length of a filter, and setting an initial coefficient of an equalizer;
• performing butterfly filtering on two polarized input signals according to the coefficient of the equalizer to obtain two polarized output signals;
• determining an error signal according to the two polarized output signals, wherein the error signal is a sum of a first error which is a minimum value of differences between a target convergence radius and squares of modulus of the output signals, and a second error which is a difference between an average value of squares of modulus of a plurality of output signals and a target average power;
• and
• adjusting the coefficient of the equalizer according to the error signal.

A non-transitory computer-readable storage medium, storing a computer-executable instruction which, when executed by a computer, causes the computer to perform an adaptive equalization method comprising:

• determining a tap length of a filter, and setting an initial coefficient of an equalizer;
• performing butterfly filtering on two polarized input signals according to the coefficient of the equalizer to obtain two polarized output signals;
• determining an error signal according to the two polarized output signals, wherein the error signal is a sum of a first error which is a minimum value of differences between a target convergence radius and squares of modulus of the output signals, and a second error which is a difference between an average value of squares of modulus of a plurality of output signals and a target average power;
• and
• adjusting the coefficient of the equalizer according to the error signal.