US 2017/0286250 A1 · Signal Compensation Method and Device

Abstract

A signal compensation method and device, where the method includes receiving a signal sequence suffering from intersymbol interference (ISI), setting a first filtering coefficient to perform filter compensation on the received signal sequence to obtain a first compensation signal sequence, setting a balance filtering coefficient to perform filter compensation on the first compensation signal sequence to obtain a balance compensation result, where the balance filtering coefficient is obtained by adjusting, according to a first compensation error, a balance filtering coefficient set last time, performing sequence estimation on the balance compensation result and outputting the balance compensation result, where the first compensation error adjusts the balance filtering coefficient set to perform filter compensation on the first compensation signal sequence in an iterative manner, thereby effectively compensating for the signal sequence suffering from the ISI, and improving performance of an optical fiber communications system.

Claims20

Dependent claims

A signal compensation device, comprising:

a balance filter;
and
a processor coupled to the balance filter and configured to:
receive an input signal sequence suffering from intersymbol interference (ISI);
and
set a first filtering coefficient to perform filter compensation on the received input signal sequence to obtain a first compensation signal sequence, wherein the balance filter is configured to set a balance filtering coefficient to perform the filter compensation on the first compensation signal sequence to obtain a balance compensation result, wherein the balance filtering coefficient is obtained by adjusting, according to a first compensation error received from the processor, a balance filtering coefficient set last time, and
wherein the processor is further configured to:
perform sequence estimation on the balance compensation result;
output the balance compensation result;
obtain the first compensation error by calculation according to a compensation error value obtained last time by calculation and a compensation error value obtained the last but one time by calculation;
and
send the first compensation error to the balance filter.

9 more elements

A signal compensation method, comprising:

receiving an input signal sequence suffering from intersymbol interference (ISI);
setting a first filtering coefficient to perform filter compensation on the received input signal sequence to obtain a first compensation signal sequence;
setting a balance filtering coefficient to perform the filter compensation on the first compensation signal sequence to obtain a balance compensation result, wherein the balance filtering coefficient is obtained by adjusting, according to a first compensation error, a balance filtering coefficient set last time, and wherein the first compensation error is obtained by calculation according to a compensation error value obtained last time by calculation and a compensation error value obtained the last but one time by calculation;
performing sequence estimation on the obtained balance compensation result;
and
outputting the balance compensation result.

3 more elements

A signal compensation device, comprising:

a signal receiver configured to receive an input signal sequence suffering from intersymbol interference (ISI);
a processor coupled to the signal receiver and configured to:
set a first filtering coefficient to perform filter compensation on the received input signal sequence to obtain a first compensation signal sequence;
and
set a balance filtering coefficient to perform the filter compensation on the first compensation signal sequence to obtain a balance compensation result, wherein the balance filtering coefficient is obtained by adjusting, according to a first compensation error, a balance filtering coefficient set last time, and wherein the first compensation error is obtained by calculation according to a compensation error value obtained last time by calculation and a compensation error value obtained the last but one time by calculation;
and
a signal transmitter coupled to the signal receiver and the processor and configured to:
perform sequence estimation on the received balance compensation result;
and
output the balance compensation result.

7 more elements

Dependencies are inferred from the claim text.

Signal Compensation Method and Device

Life of this patent

Signal Compensation Method and Device

Life of this patent

Abstract

Claims20