CN116016047A - Self-adaptive channel equalization method and device - Google Patents
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Abstract
The application relates to a self-adaptive channel equalization method and a device, which relate to the technical field of optical communication and comprise the steps of respectively carrying out multi-order complex computation on the real part and the imaginary part of two paths of polarized input signals so as to obtain initial output signals of two paths of polarization; and carrying out 1-order real number calculation on the initial output signals of the two paths of polarization to obtain target output signals of the two paths of polarization. The self-adaptive channel equalization algorithm in the DSP algorithm at the receiving end of the coherent optical communication system is simplified, so that the number of required multipliers is reduced, and further the cost and the power consumption of a chip are effectively reduced.
Description
Technical Field
The present disclosure relates to the field of optical communications technologies, and in particular, to a method and apparatus for adaptive channel equalization.
Background
With the continuous development of coherent optical communication technology for recent 10 years, high-speed coherent optical communication devices have been commercially available on a large scale in backbone networks. Meanwhile, with the rapid development of network services and continuous update of communication demands, demands for improving communication rates in other scenes outside a backbone network are also increasing, and the coherent optical communication technology can fully exert the advantage of high rate, so that the coherent optical communication technology can play a role in short-distance communication scenes. However, the conventional coherent optical communication technology has high system and algorithm complexity, and therefore, relies on a complex digital signal processing (DigitalSignal Processing, DSP) chip, so that the large-scale application of the coherent optical communication technology in a short-distance scene is restricted, and the short-distance communication scene has higher requirements on low cost and low power consumption, so that the conventional complex coherent optical communication technology is difficult to directly apply.
The adaptive channel equalization algorithm in the DSP algorithm of the receiving end of the conventional coherent optical communication system often adopts a butterfly algorithm structure based on 2×2 multiple-input multiple-output (multiple-einput MultipleOutput, MIMO) of a complex multiplier. However, for an N-order 2×2 butterfly adaptive equalization module, each computation requires N complex multipliers, and four paths require a total of 4N complex multipliers. The multiplier is a scarce hardware resource, and compared with other algorithm resources such as an adder or a comparator, the realization difficulty is larger, so that the cost of a chip is higher due to the larger number of multipliers, and the power consumption of the chip is increased due to the use of a large number of multipliers, so that the application of the high-speed coherent optical communication technology in a short-distance scene is not facilitated.
Disclosure of Invention
The application provides a self-adaptive channel equalization method and a device, which are used for solving the problems of high chip cost and high power consumption caused by excessive number of multipliers required by the traditional self-adaptive channel equalization method in the related technology.
In a first aspect, there is provided an adaptive channel equalization method, comprising:
respectively carrying out multi-order complex computation on the real part and the imaginary part of the two-path polarized input signals to obtain initial output signals of the two-path polarization;
and carrying out 1-order real number calculation on the initial output signals of the two paths of polarization to obtain target output signals of the two paths of polarization.
In some embodiments, the performing multi-order complex computation on the real part and the imaginary part of the two-path polarized input signal to obtain two-path polarized initial output signals includes:
and performing four-rule operation according to the real part, the corresponding initial coefficient and the imaginary part of the two paths of polarized input signals and the corresponding initial coefficient to obtain an initial output signal corresponding to each path of polarization.
In some embodiments, the performing four operations according to the real part, the imaginary part and the initial coefficient corresponding to the two polarized input signals to obtain an initial output signal corresponding to each polarization includes:
the real part and the imaginary part of the initial output signal are respectively calculated by a first calculation formula, wherein the first calculation formula is as follows:
wherein Einx_re (i) and Einx_im (i) represent the real and imaginary parts of the X-polarized input signal, respectively, einy_re (i) and Einy_im (i) represent the real and imaginary parts of the Y-polarized input signal, respectively, eoutx1_re and Eoutx1_im represent the real and imaginary parts of the X-polarized initial output signal, respectively, eout1_re and Eout1_im represent the real and imaginary parts of the Y-polarized initial output signal, respectively, F x Re (i) is the initial coefficient of the real part of the X-polarized input signal to the real part of the X-polarized initial output signal, F x Im (i) is the initial coefficient of the imaginary part of the X-polarized input signal to the imaginary part of the X-polarized initial output signal, F y Re (i) is the initial coefficient of the real part of the Y polarized input signal to the real part of the Y polarized initial output signal, F y Im (i) is the initial coefficient of the Y-polarized input signal imaginary part to the Y-polarized initial output signal imaginary part, i represents the equalization module series and iε [1, N]。
In some embodiments, the performing 1-order real computation on the two-path polarized initial output signal to obtain the two-path polarized target output signal includes:
and performing four-rule operation according to the real part, the corresponding target coefficient and the imaginary part of the initial output signals of the two paths of polarization and the corresponding target coefficient to obtain the target output signals corresponding to each path of polarization.
In some embodiments, the performing four-rule operation according to the real part of the initial output signal with two paths of polarization and the corresponding target coefficient, the imaginary part and the corresponding target coefficient to obtain the target output signal with each path of polarization includes:
the real part and the imaginary part of the target output signal are respectively calculated by a second calculation formula, wherein the second calculation formula is as follows:
wherein, eoutx_re and eoutx_im represent the real part and the imaginary part of the X polarized object output signal respectively, and eouty_re and eouty_im represent the real part and the imaginary part of the Y polarized object output signal respectively, F xr _ xr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the X-polarized object output signal, F xi _ xr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the X-polarized object output signal, F yr _ xr Representing the real part of the Y polarized initial signal to the X polarization orderTarget coefficient of target output signal real part, F yi _ xr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the X polarized object output signal, F xr _ xi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the X-polarized object output signal, F xi _ xi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the X-polarized target output signal, F yr _ xi Object coefficient representing real part of Y polarized initial signal to imaginary part of X polarized object output signal, F yi _ xi A target coefficient representing the imaginary part of the Y-polarized initial output signal to the imaginary part of the X-polarized target output signal, F xr _ yr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the Y-polarized object output signal, F xi _ yr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the Y-polarized object output signal, F yr _ yr An object coefficient representing the real part of the Y polarized initial signal to the real part of the Y polarized object output signal, F yi _ yr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the Y polarized object output signal, F xr _ yi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the Y-polarized object output signal, F xi _ yi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the Y-polarized target output signal, F yr _ yi An object coefficient representing the real part of the Y-polarized initial signal to the imaginary part of the Y-polarized object output signal, F yi _ yi Representing the target coefficient from the imaginary part of the Y-polarized initial output signal to the imaginary part of the Y-polarized target output signal.
In a second aspect, there is provided an adaptive channel equalization apparatus comprising:
a complex computing unit for performing multi-order complex computation on the real part and the imaginary part of the two-path polarized input signal respectively to obtain two-path polarized initial output signals;
and the real number calculation unit is used for carrying out 1-order real number calculation on the initial output signals of the two paths of polarization so as to obtain target output signals of the two paths of polarization.
In some embodiments, the complex computing unit is specifically configured to:
and performing four-rule operation according to the real part, the corresponding initial coefficient and the imaginary part of the two paths of polarized input signals and the corresponding initial coefficient to obtain an initial output signal corresponding to each path of polarization.
In some embodiments, the complex computing unit is specifically further configured to:
the real part and the imaginary part of the initial output signal are respectively calculated by a first calculation formula, wherein the first calculation formula is as follows:
wherein Einx_re (i) and Einx_im (i) represent the real and imaginary parts of the X-polarized input signal, respectively, einy_re (i) and Einy_im (i) represent the real and imaginary parts of the Y-polarized input signal, respectively, eoutx1_re and Eoutx1_im represent the real and imaginary parts of the X-polarized initial output signal, respectively, eout1_re and Eout1_im represent the real and imaginary parts of the Y-polarized initial output signal, respectively, F x Re (i) is the initial coefficient of the real part of the X-polarized input signal to the real part of the X-polarized initial output signal, F x Im (i) is the initial coefficient of the imaginary part of the X-polarized input signal to the imaginary part of the X-polarized initial output signal, F y Re (i) is the initial system of the real part of the Y polarized input signal to the real part of the Y polarized initial output signalNumber F y Im (i) is the initial coefficient of the Y-polarized input signal imaginary part to the Y-polarized initial output signal imaginary part, i represents the equalization module series and iε [1, N]。
In some embodiments, the real number calculation unit is specifically configured to:
and performing four-rule operation according to the real part, the corresponding target coefficient and the imaginary part of the initial output signals of the two paths of polarization and the corresponding target coefficient to obtain the target output signals corresponding to each path of polarization.
In some embodiments, the real number calculation unit is specifically further configured to:
the real part and the imaginary part of the target output signal are respectively calculated by a second calculation formula, wherein the second calculation formula is as follows:
wherein, eoutx_re and eoutx_im represent the real part and the imaginary part of the X polarized object output signal respectively, and eouty_re and eouty_im represent the real part and the imaginary part of the Y polarized object output signal respectively, F xr _ xr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the X-polarized object output signal, F xi _ xr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the X-polarized object output signal, F yr _ xr Object coefficient representing real part of Y polarized initial signal to real part of X polarized object output signal, F yi _ xr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the X polarized object output signal, F xr _ xi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the X-polarized object output signal, F xi _ xi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the X-polarized target output signal, F yr _ xi Object coefficient representing real part of Y polarized initial signal to imaginary part of X polarized object output signal, F yi _ xi A target coefficient representing the imaginary part of the Y-polarized initial output signal to the imaginary part of the X-polarized target output signal, F xr _ yr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the Y-polarized object output signal, F xi _ yr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the Y-polarized object output signal, F yr _ yr An object coefficient representing the real part of the Y polarized initial signal to the real part of the Y polarized object output signal, F yi _ yr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the Y polarized object output signal, F xr _ yi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the Y-polarized object output signal, F xi _ yi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the Y-polarized target output signal, F yr _ yi An object coefficient representing the real part of the Y-polarized initial signal to the imaginary part of the Y-polarized object output signal, F yi _ yi Representing the target coefficient from the imaginary part of the Y-polarized initial output signal to the imaginary part of the Y-polarized target output signal.
The application provides a self-adaptive channel equalization method and device, comprising the steps of respectively carrying out multi-order complex computation on the real part and the imaginary part of two paths of polarized input signals to obtain initial output signals of two paths of polarization; and carrying out 1-order real number calculation on the initial output signals of the two paths of polarization to obtain target output signals of the two paths of polarization. The self-adaptive channel equalization algorithm in the DSP algorithm at the receiving end of the coherent optical communication system is simplified, so that the number of required multipliers is reduced, and further the cost and the power consumption of a chip are effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of an adaptive channel equalization method according to an embodiment of the present application;
FIG. 2 is a block diagram of a conventional 2×2 butterfly adaptive channel equalization algorithm;
fig. 3 is a block diagram of a structure of an adaptive channel equalization method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an adaptive channel equalization apparatus according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
The embodiment of the application provides a self-adaptive channel equalization method and device, which can solve the problems of high chip cost and high power consumption caused by excessive multipliers required by the traditional self-adaptive channel equalization method in the related art.
Fig. 1 is a schematic diagram of an adaptive channel equalization method according to the present embodiment, including the following steps:
step S10: respectively carrying out multi-order complex computation on the real part and the imaginary part of the two-path polarized input signals to obtain initial output signals of the two-path polarization;
step S20: and carrying out 1-order real number calculation on the initial output signals of the two paths of polarization to obtain target output signals of the two paths of polarization.
Exemplarily, referring to fig. 2, it should be appreciated that the conventional 2×2 butterfly adaptive channel equalization algorithm consists of 4N-order complex computation modules. Wherein Einx and Einy are X, Y two-path polarized input end complex signals, F xx 、F xy 、F yx F (F) yy Four paths of complex coefficients are respectively used, and the complex coefficients are updated in real time by a coefficient updating algorithm. In the traditional 2×2 butterfly adaptive channel equalization algorithm, the input complex signal and the complex coefficient are multiplied and summed to obtain an output signal, and then the output signal is subjected to an adaptive channel equalization module to compensate intersymbol interference caused by chromatic dispersion, polarization-related loss, polarization-related dispersion and various device damage, and polarization demultiplexing is completed, so that X, Y two-path polarized signals Eoutx and eoutty are recovered. Specifically, the calculation formula of the traditional 2×2 butterfly adaptive channel equalization algorithm is as follows:
wherein Einx and Einy are respectively the input of two paths of polarized signals of the equalization module X, Y, eoutx and Eouty are respectively the output of the equalization module, F is the update coefficient of the equalization module, and the upper right-hand subscript indicates the input and output directions of the polarization states, wherein F xx Is the coefficient of the X-polarized input signal to the X-polarized output signal, F xy Is the coefficient of the X-polarized input signal to the Y-polarized output signal, F yx Is the coefficient of the Y polarized input signal to the X polarized output signal, F yy Is the coefficient of the Y polarized input signal to the Y polarized output signal; i is the number of the equalization module series, and the value range is 1-N. It can be seen that, for an nth order 2 x 2 butterfly adaptive equalization module,each calculation requires the consumption of N complex multipliers, and four paths consume a total of 4N complex multipliers.
However, in this embodiment, the adaptive channel equalization algorithm structure in the DSP algorithm at the receiving end of the coherent optical communication system is simplified according to the characteristics of low dispersion, low polarization mode loss, low nonlinear effect, and the like of the short-distance communication scene. Specifically, referring to fig. 3, the simplified adaptive channel equalization algorithm in this embodiment is mainly divided into two parts, where the first part is composed of 2N-order complex computing modules, and the second part is composed of 1-order real number 4×4 butterfly computing modules. It can be understood that in the 2N-order complex computing modules of the first part, only 2N complex multipliers are needed to respectively perform multi-order complex computation on the real part and the imaginary part of the two-path polarized input signal, so as to obtain the two-path polarized initial output signal; in the calculation module of the second part, which is in a 1-order real number 4×4 butterfly structure, only 16 real number multipliers are needed to respectively perform 1-order real number calculation on the two-path polarized initial output signals, so that the two-path polarized final output signals can be obtained.
As can be seen, in this embodiment, a total of 2N complex multipliers+16 real multipliers are required; the conventional N-order complex 2×2 butterfly structure requires 4N complex multipliers, and the value of N in the high-speed coherent optical communication system is larger, so that one complex multiplier in the DSP needs 3 or 4 real multipliers, i.e., the conventional N-order complex 2×2 butterfly structure requires about 12N to 16N complex multipliers in the high-speed coherent optical communication system. In summary, compared with the prior art, the resource consumption of the multiplier required by the embodiment is reduced by at least more than half, which effectively reduces the cost and power consumption of the chip.
Further, the step S10 specifically includes:
and performing four-rule operation according to the real part, the corresponding initial coefficient and the imaginary part of the two paths of polarized input signals and the corresponding initial coefficient to obtain an initial output signal corresponding to each path of polarization.
In this embodiment, the input signals formed by the real parts and the imaginary parts of the X, Y two-path polarized signals are processed by the first 2 parallel N-order complex computing modules respectively, so as to obtain the initial output signals corresponding to each path of polarization. Wherein, the calculation formula of the first part is as follows:
where Einx is an X-polarized input signal, which contains a real part Einx_re and an imaginary part Einx_im; einy is a Y polarized input signal that contains a real part Einy_re and an imaginary part Einy_im; eoutx1 is an X-polarized output signal (i.e., an X-polarized initial output signal) that contains a real part eoutx1_re and an imaginary part eoutx1_im; eout1 is a Y-polarized output signal (i.e., Y-polarized initial output signal) that contains real components eout1_re and imaginary components eout1_im; f is the coefficient of the equalization module, the upper right-hand corner subscript indicates the polarization state input-output direction, where F x Is the initial coefficient of the X-polarized input signal to the X-polarized output signal, F y Is the initial coefficient of the Y polarized input signal to the Y polarized output signal; i is the number of the equalization module series, and the value range is 1-N, wherein N is a positive integer. It should be noted that, the coefficient F is updated and determined according to a coefficient updating method corresponding to the actual requirement, which is not limited herein.
Specifically, the performing four operations according to the real part, the imaginary part and the initial coefficient corresponding to the two polarized input signals to obtain an initial output signal corresponding to each polarization includes:
the real part and the imaginary part of the initial output signal are respectively calculated by a first calculation formula, wherein the first calculation formula is as follows:
wherein Einx_re (i) and Einx_im (i) represent the real and imaginary parts of the X-polarized input signal, respectively, einy_re (i) and Einy_im (i) represent the real and imaginary parts of the Y-polarized input signal, respectively, eoutx1_re and Eoutx1_im represent the real and imaginary parts of the X-polarized initial output signal, respectively, eout1_re and Eout1_im represent the real and imaginary parts of the Y-polarized initial output signal, respectively, F x Re (i) is the initial coefficient of the real part of the X-polarized input signal to the real part of the X-polarized initial output signal, F x Im (i) is the initial coefficient of the imaginary part of the X-polarized input signal to the imaginary part of the X-polarized initial output signal, F y Re (i) is the initial coefficient of the real part of the Y polarized input signal to the real part of the Y polarized initial output signal, F y Im (i) is the initial coefficient of the Y-polarized input signal imaginary part to the Y-polarized initial output signal imaginary part, i represents the equalization module series and iε [1, N]。
In this embodiment, the input signal composed of the real part and the imaginary part of the X, Y two-way polarized signal is processed and calculated by the first calculation formula in the first 2 parallel N-order complex calculation modules to obtain the initial output signals eoutx1_re and eoutx1_im of the real part and the imaginary part corresponding to the X-way polarization and the initial output signals eoutt1_re and eoutt1_im of the real part and the imaginary part corresponding to the Y-way polarization, and then the real part initial output signal eoutx1_re and the imaginary part initial output signal eoutx1_im of the X-way polarization and the real part initial output signal eoutt1_re and the imaginary part initial output signal eoutt1_im of the Y-way polarization are used as the input signals of the second part in step S20.
Further, the step S20 specifically includes:
and performing four-rule operation according to the real part, the corresponding target coefficient and the imaginary part of the initial output signals of the two paths of polarization and the corresponding target coefficient to obtain the target output signals corresponding to each path of polarization.
In this embodiment, the initial output signals eoutx1_re, eoutx1_im, eouty1_re, and eouty1_im obtained by calculation in the first portion are respectively processed in the calculation module of the 1 st order real 4×4 butterfly structure in the second portion in step S20, so as to obtain the target output signal corresponding to each polarization.
Specifically, the performing four operations according to the real part, the imaginary part and the corresponding target coefficient of the initial output signal of two paths of polarization to obtain the corresponding target output signal of each path of polarization includes:
the real part and the imaginary part of the target output signal are respectively calculated by a second calculation formula, wherein the second calculation formula is as follows:
wherein, eoutx_re and eoutx_im represent the real part and the imaginary part of the X polarized object output signal respectively, and eouty_re and eouty_im represent the real part and the imaginary part of the Y polarized object output signal respectively, F xr _ xr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the X-polarized object output signal, F xi _ xr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the X-polarized object output signal, F yr _ xr Object coefficient representing real part of Y polarized initial signal to real part of X polarized object output signal, F yi _ xr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the X polarized object output signal, F xr _ xi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the X-polarized object output signal, F xi _ xi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the X-polarized target output signal, F yr _ xi Object coefficient representing real part of Y polarized initial signal to imaginary part of X polarized object output signal, F yi _ xi A target coefficient representing the imaginary part of the Y-polarized initial output signal to the imaginary part of the X-polarized target output signal, F xr _ yr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the Y-polarized object output signal, F xi _ yr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the Y-polarized object output signal, F yr _ yr An object coefficient representing the real part of the Y polarized initial signal to the real part of the Y polarized object output signal, F yi _ yr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the Y polarized object output signal, F xr _ yi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the Y-polarized object output signal, F xi _ yi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the Y-polarized target output signal, F yr _ yi An object coefficient representing the real part of the Y-polarized initial signal to the imaginary part of the Y-polarized object output signal, F yi _ yi Representing the target coefficient from the imaginary part of the Y-polarized initial output signal to the imaginary part of the Y-polarized target output signal. Note that, in this embodiment, each target coefficient is updated and determined according to a coefficient updating method corresponding to an actual requirement, which is not limited herein.
In this embodiment, the input signals formed by the real part and the imaginary part of the X, Y two-path polarized initial output signal are processed and calculated by the second calculation formula in the calculation module of the 2 nd part 1 st order real 4×4 butterfly structure, for example, the real part eoutx_re of the final X-polarized output signal (i.e. the target output signal) is obtained after summing the 4 results output to the X-polarized real part direction, and the imaginary part eoutx_im of the final X-polarized output signal, and the real part eoutty_re and the imaginary part eoutty_im of the final Y-polarized output signal can be obtained by the same method.
In summary, the embodiment simplifies the adaptive channel equalization algorithm in the DSP algorithm at the receiving end of the coherent optical communication system, so as to reduce the number of multipliers required, thereby effectively reducing the cost and power consumption of the chip.
Referring to fig. 4, an embodiment of the present application further provides an adaptive channel equalization apparatus, including:
a complex computing unit for performing multi-order complex computation on the real part and the imaginary part of the two-path polarized input signal respectively to obtain two-path polarized initial output signals;
and the real number calculation unit is used for carrying out 1-order real number calculation on the initial output signals of the two paths of polarization so as to obtain target output signals of the two paths of polarization.
Further, the complex computing unit is specifically configured to:
and performing four-rule operation according to the real part, the corresponding initial coefficient and the imaginary part of the two paths of polarized input signals and the corresponding initial coefficient to obtain an initial output signal corresponding to each path of polarization.
Further, the complex computing unit is specifically further configured to:
the real part and the imaginary part of the initial output signal are respectively calculated by a first calculation formula, wherein the first calculation formula is as follows:
wherein Einx_re (i) and Einx_im (i) represent the real and imaginary parts of the X-polarized input signal, respectively, einy_re (i) and Einy_im (i) represent the real and imaginary parts of the Y-polarized input signal, respectively, eoutx1_re and Eoutx1_im represent the real and imaginary parts of the X-polarized initial output signal, respectively, eout1_re and Eout1_im represent the real and imaginary parts of the Y-polarized initial output signal, respectively, F x Re (i) is the initial coefficient of the real part of the X-polarized input signal to the real part of the X-polarized initial output signal, F x Im (i) is the initial coefficient of the imaginary part of the X-polarized input signal to the imaginary part of the X-polarized initial output signal, F y Re (i) is the initial coefficient of the real part of the Y polarized input signal to the real part of the Y polarized initial output signal, F y Im (i) is the initial coefficient of the Y-polarized input signal imaginary part to the Y-polarized initial output signal imaginary part, i represents the equalization module series and iε [1, N]。
Further, the real number calculation unit is specifically configured to:
and performing four-rule operation according to the real part, the corresponding target coefficient and the imaginary part of the initial output signals of the two paths of polarization and the corresponding target coefficient to obtain the target output signals corresponding to each path of polarization.
Further, the real number calculating unit is specifically further configured to:
the real part and the imaginary part of the target output signal are respectively calculated by a second calculation formula, wherein the second calculation formula is as follows:
wherein, eoutx_re and eoutx_im represent the real part and the imaginary part of the X polarized object output signal respectively, and eouty_re and eouty_im represent the real part and the imaginary part of the Y polarized object output signal respectively, F xr _ xr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the X-polarized object output signal, F xi _ xr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the X-polarized object output signal, F yr _ xr Object coefficient representing real part of Y polarized initial signal to real part of X polarized object output signal, F yi _ xr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the X polarized object output signal, F xr _ xi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the X-polarized object output signal, F xi _ xi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the X-polarized target output signal, F yr _ xi Object coefficient representing real part of Y polarized initial signal to imaginary part of X polarized object output signal, F yi _ xi A target coefficient representing the imaginary part of the Y-polarized initial output signal to the imaginary part of the X-polarized target output signal, F xr _ yr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the Y-polarized object output signal, F xi _ yr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the Y-polarized object output signal, F yr _ yr An object coefficient representing the real part of the Y polarized initial signal to the real part of the Y polarized object output signal, F yi _ yr Representing the imaginary part of the Y-polarized initial output signal toTarget coefficient of real part of Y polarized target output signal, F xr _ yi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the Y-polarized object output signal, F xi _ yi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the Y-polarized target output signal, F yr _ yi An object coefficient representing the real part of the Y-polarized initial signal to the imaginary part of the Y-polarized object output signal, F yi _ yi Representing the target coefficient from the imaginary part of the Y-polarized initial output signal to the imaginary part of the Y-polarized target output signal.
It should be noted that, for convenience and brevity of description, the specific operation process of the apparatus and each unit described above may refer to the corresponding process in the foregoing embodiment of the adaptive channel equalization method, which is not described herein again.
In the description of the present application, it should be noted that relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An adaptive channel equalization method, comprising:
respectively carrying out multi-order complex computation on the real part and the imaginary part of the two-path polarized input signals to obtain initial output signals of the two-path polarization;
and carrying out 1-order real number calculation on the initial output signals of the two paths of polarization to obtain target output signals of the two paths of polarization.
2. The adaptive channel equalization method of claim 1, wherein said performing a multi-order complex computation on real and imaginary parts of the two-way polarized input signal, respectively, to obtain an initial output signal of the two-way polarization comprises:
and performing four-rule operation according to the real part, the corresponding initial coefficient and the imaginary part of the two paths of polarized input signals and the corresponding initial coefficient to obtain an initial output signal corresponding to each path of polarization.
3. The adaptive channel equalization method of claim 2, wherein said performing a four-law operation based on the real part of the two-way polarized input signal and its corresponding initial coefficient, the imaginary part and its corresponding initial coefficient to obtain an initial output signal corresponding to each way of polarization comprises:
the real part and the imaginary part of the initial output signal are respectively calculated by a first calculation formula, wherein the first calculation formula is as follows:
wherein Einx_re (i) and Einx_im (i) represent the real and imaginary parts of the X-polarized input signal, respectively, einy_re (i) and Einy_im (i) represent the real and imaginary parts of the Y-polarized input signal, respectively, eoutx1_re and Eoutx1_im represent the real and imaginary parts of the X-polarized initial output signal, respectively, eout1_re and Eout1_im represent the real and imaginary parts of the Y-polarized initial output signal, respectively, F x Re (i) is the initial coefficient of the real part of the X-polarized input signal to the real part of the X-polarized initial output signal, F x Im (i) is the initial coefficient of the imaginary part of the X-polarized input signal to the imaginary part of the X-polarized initial output signal, F y Re (i) is the initial coefficient of the real part of the Y polarized input signal to the real part of the Y polarized initial output signal, F y Im (i) is the initial coefficient of the Y-polarized input signal imaginary part to the Y-polarized initial output signal imaginary part, i represents the equalization module series and iε [1, N]。
4. The adaptive channel equalization method of claim 3, wherein said performing a 1-order real computation on the two-way polarized initial output signal to obtain a two-way polarized target output signal comprises:
and performing four-rule operation according to the real part, the corresponding target coefficient and the imaginary part of the initial output signals of the two paths of polarization and the corresponding target coefficient to obtain the target output signals corresponding to each path of polarization.
5. The adaptive channel equalization method of claim 4, wherein said performing a four-rule operation based on the real part of the initial output signal of two polarizations and its corresponding target coefficient, the imaginary part and its corresponding target coefficient to obtain a corresponding target output signal of each polarization comprises:
the real part and the imaginary part of the target output signal are respectively calculated by a second calculation formula, wherein the second calculation formula is as follows:
wherein, eoutx_re and eoutx_im represent the real part and the imaginary part of the X polarized object output signal respectively, and eouty_re and eouty_im represent the real part and the imaginary part of the Y polarized object output signal respectively, F xr_xr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the X-polarized object output signal, F xi_xr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the X-polarized object output signal, F yr_xr Object coefficient representing real part of Y polarized initial signal to real part of X polarized object output signal, F yi_xr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the X polarized object output signal, F xr_xi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the X-polarized object output signal, F xi_xi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the X-polarized target output signal, F yr_xi Object coefficient representing real part of Y polarized initial signal to imaginary part of X polarized object output signal, F yi_xi A target coefficient representing the imaginary part of the Y-polarized initial output signal to the imaginary part of the X-polarized target output signal, F xr_yr Representing an initial transmission of X-polarizationOutputting the target coefficient from the real part of the signal to the real part of the Y-polarized target output signal, F xi_yr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the Y-polarized object output signal, F yr_yr An object coefficient representing the real part of the Y polarized initial signal to the real part of the Y polarized object output signal, F yi_yr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the Y polarized object output signal, F xr_yi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the Y-polarized object output signal, F xi_yi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the Y-polarized target output signal, F yr_yi An object coefficient representing the real part of the Y-polarized initial signal to the imaginary part of the Y-polarized object output signal, F yi_yi Representing the target coefficient from the imaginary part of the Y-polarized initial output signal to the imaginary part of the Y-polarized target output signal.
6. An adaptive channel equalization apparatus, comprising:
a complex computing unit for performing multi-order complex computation on the real part and the imaginary part of the two-path polarized input signal respectively to obtain two-path polarized initial output signals;
and the real number calculation unit is used for carrying out 1-order real number calculation on the initial output signals of the two paths of polarization so as to obtain target output signals of the two paths of polarization.
7. The adaptive channel equalization apparatus of claim 6, wherein said complex computing unit is specifically configured to:
and performing four-rule operation according to the real part, the corresponding initial coefficient and the imaginary part of the two paths of polarized input signals and the corresponding initial coefficient to obtain an initial output signal corresponding to each path of polarization.
8. The adaptive channel equalization apparatus of claim 7, wherein said complex computing unit is further operable to:
the real part and the imaginary part of the initial output signal are respectively calculated by a first calculation formula, wherein the first calculation formula is as follows:
wherein Einx_re (i) and Einx_im (i) represent the real and imaginary parts of the X-polarized input signal, respectively, einy_re (i) and Einy_im (i) represent the real and imaginary parts of the Y-polarized input signal, respectively, eoutx1_re and Eoutx1_im represent the real and imaginary parts of the X-polarized initial output signal, respectively, eout1_re and Eout1_im represent the real and imaginary parts of the Y-polarized initial output signal, respectively, F x Re (i) is the initial coefficient of the real part of the X-polarized input signal to the real part of the X-polarized initial output signal, F x Im (i) is the initial coefficient of the imaginary part of the X-polarized input signal to the imaginary part of the X-polarized initial output signal, F y Re (i) is the initial coefficient of the real part of the Y polarized input signal to the real part of the Y polarized initial output signal, F y Im (i) is the initial coefficient of the Y-polarized input signal imaginary part to the Y-polarized initial output signal imaginary part, i represents the equalization module series and iε [1, N]。
9. The adaptive channel equalization apparatus of claim 8, wherein the real number calculation unit is specifically configured to:
and performing four-rule operation according to the real part, the corresponding target coefficient and the imaginary part of the initial output signals of the two paths of polarization and the corresponding target coefficient to obtain the target output signals corresponding to each path of polarization.
10. The adaptive channel equalization apparatus of claim 9, wherein said real number calculation unit is further specifically configured to:
the real part and the imaginary part of the target output signal are respectively calculated by a second calculation formula, wherein the second calculation formula is as follows:
wherein, eoutx_re and eoutx_im represent the real part and the imaginary part of the X polarized object output signal respectively, and eouty_re and eouty_im represent the real part and the imaginary part of the Y polarized object output signal respectively, F xr_xr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the X-polarized object output signal, F xi_xr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the X-polarized object output signal, F yr_xr Object coefficient representing real part of Y polarized initial signal to real part of X polarized object output signal, F yi_xr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the X polarized object output signal, F xr_xi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the X-polarized object output signal, F xi_xi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the X-polarized target output signal, F yr_xi Representing the real part of the Y polarized initial signal to X polarizationTarget coefficient of imaginary part of target output signal, F yi_xi A target coefficient representing the imaginary part of the Y-polarized initial output signal to the imaginary part of the X-polarized target output signal, F xr_yr An object coefficient representing the real part of the X-polarized initial output signal to the real part of the Y-polarized object output signal, F xi_yr An object coefficient representing an imaginary part of the X-polarized initial output signal to a real part of the Y-polarized object output signal, F yr_yr An object coefficient representing the real part of the Y polarized initial signal to the real part of the Y polarized object output signal, F yi_yr An object coefficient representing the imaginary part of the Y polarized initial output signal to the real part of the Y polarized object output signal, F xr_yi Object coefficients representing the real part of the X-polarized initial output signal to the imaginary part of the Y-polarized object output signal, F xi_yi A target coefficient representing the imaginary part of the X-polarized initial output signal to the imaginary part of the Y-polarized target output signal, F yr_yi An object coefficient representing the real part of the Y-polarized initial signal to the imaginary part of the Y-polarized object output signal, F yi_yi Representing the target coefficient from the imaginary part of the Y-polarized initial output signal to the imaginary part of the Y-polarized target output signal.
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