Nonlinear compensating apparatus and method and transmitter

摘要

The present invention provides a nonlinear compensating apparatus and method and a transmitter. The nonlinear compensating apparatus includes: an information sequence acquiring unit, configured to acquire a symbol information sequence of the pulse signal; a perturbation quantity acquiring unit, configured to calculate, by pre-obtained weighting coefficients to which each item corresponds, the weighted sum of interaction items of pulses on one or more moments relative to the current moment; a perturbation quantity processing unit, configured to combine the items of the perturbation quantity based on the weighting coefficients; and an information compensating unit, configured to calculate a difference between the symbol information sequence and the processed perturbation quantity to obtain a compensated symbol information sequence. With the embodiments of the present invention, the complexity of calculation may be further lowered, and requirements on hardware may also be lowered.

主权项

1. A nonlinear compensating apparatus, comprising:
an information sequence acquiring unit, configured to acquire a symbol information sequence of a pulse signal inputted by a transmitting side; a perturbation quantity acquiring unit, configured to calculate, by pre-obtained weighting coefficients to which each item corresponds, the weighted sum of interaction items of pulses on one or more moments relative to the current moment, to obtain a perturbation quantity produced on a transmission link with a certain length; a perturbation quantity processing unit, configured to combine the items of the perturbation quantity based on the weighting coefficients, so as to transform complex addition into a combination of addition and multiplication of symbols in a finite symbol set; and an information compensating unit, configured to calculate a difference between the symbol information sequence and the processed perturbation quantity to obtain a compensated symbol information sequence, so as to cause the transmitting side to transmit signals according to the compensated symbol information sequence; wherein the perturbation quantity processing unit is used for combining the items to which the equal or approximately equal weighting coefficients correspond, or for combining the items to which the real parts of the weighting coefficients correspond, or for combining the items to which the imaginary parts of the weighting coefficients correspond.