CN106330322A - Method and device for processing frequency offset and phase offset - Google Patents

Abstract

The present invention discloses a frequency offset phase offset processing method and apparatus. The method comprises the steps of respectively converting a first polarization signal and a second polarization signal into a third polarization signal and a fourth polarization signal in a polar coordinate system; performing frequency offset compensation on the third polarization signal and the fourth polarization signal, so as to obtain a fifth polarization signal and a sixth polarization signal after frequency offset compensation; dividing the fifth polarization signal and the sixth polarization signal into two paths, and performing fourth-order frequency offset estimation by using the first path of signal so as to obtain a frequency offset compensation value; performing fourth-order phase estimation by using intermediate data of the fourth-order frequency offset estimation, so as to obtain a phase compensation value; for the second path of signal, performing phase compensation on the fifth polarization signal and the sixth polarization signal by using the phase compensation value, so as to obtain a seventh polarization signal and an eighth polarization signal after phase compensation; and respectively converting the seventh polarization signal and the eighth polarization signal in the polar coordinate system into a ninth polarization signal and a tenth polarization signal in a Cartesian coordinate system.

Description

Method and device for processing frequency offset and phase offset

technical field

The invention relates to the frequency offset and phase offset technology in the communication field, in particular to a frequency offset and phase offset processing method and device in an optical transmission network.

Background technique

In the development of transmission technology, optical fiber has proved to be an indispensable medium. How to use the least amount of optical fiber to transmit the most abundant information, out of this exploration, the development of optical transmission has basically gone through the following stages: Space Division Multiplexing (SDM, Space Division Multiplexing) stage, Time Division Multiplexing (TDM, Time Division Multiplexing) stage and Wavelength Division Multiplexing (WDM, Wavelength Division Multiplexing) stage.

Today, wired transmission is still dominated by WDM systems. With the development of communication technology, the current commercial 40G WDM transmission has gradually evolved to 100G and 400G transmission. At the same time, the data transmission distance is also continuously expanding. In this way, the wavelength division multiplexing system will bring many problems such as chromatic dispersion, polarization film dispersion, frequency deviation and phase deviation, strong filtering effect and so on in the transmission process, which need to be solved. The solution of these problems needs to use the method of digital signal processing, called It is processed by 100G digital signal processing (DSP, Digital Signal Processing).

The traditional method of processing frequency offset and phase offset in the optical transmission network will lead to prolonged processing time, large resource consumption, and high power consumption, resulting in slow convergence speed and poor stability of the communication system, and cannot achieve the optimal resource and performance.

Contents of the invention

In order to solve the above technical problems, embodiments of the present invention provide a frequency offset and phase offset processing method and device.

The frequency offset and phase offset processing method provided by the embodiment of the present invention includes:

Converting the first polarized signal and the second polarized signal in the Cartesian coordinate system into a third polarized signal and a fourth polarized signal in the polar coordinate system, respectively;

performing frequency offset compensation on the third polarized signal and the fourth polarized signal respectively, to obtain a fifth polarized signal and a sixth polarized signal after frequency offset compensation;

Divide the fifth polarization signal and the sixth polarization signal into two paths, use the first path signal to perform quartic frequency offset estimation to obtain a frequency offset compensation value; use the intermediate data of the quartic frequency offset estimation to perform quartic Phase estimation, to obtain a phase compensation value; for the second signal, use the phase compensation value to perform phase compensation on the fifth polarization signal and the sixth polarization signal, to obtain the phase-compensated seventh polarization signal and eighth polarization signal ;

Converting the seventh polarization signal and the eighth polarization signal in the polar coordinate system to the ninth polarization signal and the tenth polarization signal in the Cartesian coordinate system respectively.

In the embodiment of the present invention, performing frequency offset compensation on the third polarized signal and the fourth polarized signal respectively to obtain the fifth polarized signal and the sixth polarized signal after frequency offset compensation includes:

In a polar coordinate system, adding an angle value of the third polarization signal to an estimated frequency offset compensation value to obtain a fifth polarization signal after frequency offset compensation;

In the polar coordinate system, adding the angle value of the fourth polarization signal to the estimated frequency offset compensation value to obtain the sixth polarization signal after frequency offset compensation;

Wherein, the frequency offset compensation value is an angle value.

In the embodiment of the present invention, the quadratic frequency offset estimation is performed using the first channel signal to obtain the frequency offset compensation value; the quadratic phase estimation is performed using the intermediate data of the quadratic frequency offset estimation to obtain the phase compensation value, including :

performing quartic frequency offset estimation by using the first signal to obtain a frequency offset compensation value, so as to perform frequency offset compensation on the third polarization signal and the fourth polarization signal;

Using the intermediate data of the quartic frequency offset estimation to perform quartic phase estimation to obtain a phase compensation value, so as to perform phase compensation on the fifth polarized signal and the sixth polarized signal.

In the embodiment of the present invention, the first polarized signal and the second polarized signal are two orthogonal polarized signals.

In the embodiment of the present invention, the ninth polarized signal and the tenth polarized signal are two orthogonal polarized signals, and the ninth polarized signal is obtained by performing frequency offset and phase offset compensation processing on the first polarized signal signal, the tenth polarized signal is a signal obtained by performing frequency offset and phase offset compensation processing on the second polarized signal.

In the embodiment of the present invention, the fifth polarized signal and the sixth polarized signal are divided into two paths, including:

splitting the fifth polarized signal into two paths, and splitting the sixth polarized signal into two paths;

A fifth polarized signal and a sixth polarized signal are used as a first signal, and another fifth polarized signal and a sixth polarized signal are used as a second signal.

The frequency offset and phase offset processing device provided by the embodiment of the present invention includes:

The first coordinate conversion unit is used to convert the first polarized signal and the second polarized signal in the Cartesian coordinate system into the third polarized signal and the fourth polarized signal in the polar coordinate system, respectively;

a frequency offset compensation unit, configured to perform frequency offset compensation on the third polarized signal and the fourth polarized signal respectively, to obtain a fifth polarized signal and a sixth polarized signal after frequency offset compensation;

a quartic frequency offset estimation unit, configured to divide the fifth polarization signal and the sixth polarization signal into two paths, and use the first path signal to perform quartic frequency offset estimation to obtain a frequency offset compensation value;

The quartic phase estimation unit is used to perform quartic phase estimation using the intermediate data of quartic frequency offset estimation to obtain a phase compensation value;

A phase compensation unit, configured to use the phase compensation value to perform phase compensation on the fifth polarization signal and the sixth polarization signal for the second signal, to obtain a phase-compensated seventh polarization signal and an eighth polarization signal;

The second coordinate conversion unit is configured to convert the seventh polarized signal and the eighth polarized signal in the polar coordinate system into the ninth polarized signal and the tenth polarized signal in the Cartesian coordinate system, respectively.

In the embodiment of the present invention, the frequency offset compensation unit includes:

The first frequency offset compensation subunit is configured to add the angle value of the third polarization signal to the estimated frequency offset compensation value in a polar coordinate system to obtain a fifth polarization signal after frequency offset compensation;

The second frequency offset compensation subunit is configured to add the angle value of the fourth polarization signal to the estimated frequency offset compensation value in a polar coordinate system to obtain a sixth polarization signal after frequency offset compensation;

Wherein, the frequency offset compensation value is an angle value.

In the embodiment of the present invention, the quartic frequency offset estimating unit is further configured to use the first signal to perform quartic frequency offset estimation to obtain a frequency offset compensation value, so that the third polarization signal and the fourth polarization The signal is compensated for frequency offset;

The quartic phase estimation unit is further configured to use the intermediate data of quartic frequency offset estimation to perform quartic phase estimation to obtain a phase compensation value, so as to perform phase compensation on the fifth polarization signal and the sixth polarization signal .

In the embodiment of the present invention, the first polarized signal and the second polarized signal are two orthogonal polarized signals.

In the embodiment of the present invention, the ninth polarized signal and the tenth polarized signal are two orthogonal polarized signals, and the ninth polarized signal is obtained by performing frequency offset and phase offset compensation processing on the first polarized signal signal, the tenth polarized signal is a signal obtained by performing frequency offset and phase offset compensation processing on the second polarized signal.

In the embodiment of the present invention, the quartic frequency offset estimation unit is further configured to divide the fifth polarized signal into two paths, and divide the sixth polarized signal into two paths; divide one path of the fifth polarized signal One path of the sixth polarized signal is used as the first path signal, and another path of the fifth polarized signal and another path of the sixth polarized signal are used as the second path signal.

In the technical solution of the embodiment of the present invention, according to the characteristics of frequency offset processing and phase offset processing, the two are analyzed, frequency offset compensation and phase compensation are both data and angle value compensation; frequency offset estimation and phase estimation are both used The method of quartic estimation needs to process the data to the quartic. To this end, coordinate transformation is carried out on the signals of the two polarization states, and the signal is converted from the Cartesian coordinate system to the polar coordinate system, so that it is at the same latitude as the angle value of compensation, so that the multiplication operation is transformed into an addition operation, and the resource , Power consumption and speed are optimized. Moreover, the embodiment of the present invention extracts the quartic estimation as a common part. At the same time, the fourth power also adopts the polar coordinate system, that is, simply do a quadrupling process for the angle, so that the fourth power operation (three multiplications and one addition) is transformed into a shifting process. The implementation scheme of the embodiment of the present invention is simple, the hardware is easy to implement, and the robustness of the system is improved; the hardware resource consumption is low, and the power consumption is low. In actual implementation, compared with the traditional method, the resources are reduced by 40%, and the cost is reduced; the calculation speed is improved. thereby improving performance.

Description of drawings

FIG. 1 is a block diagram of an existing frequency offset and phase offset processing;

FIG. 2 is a schematic flowchart of a frequency offset and phase offset processing method according to an embodiment of the present invention;

FIG. 3 is a block diagram of frequency offset and phase offset processing according to an embodiment of the present invention;

FIG. 4 is a block diagram of a frequency offset processing module according to an embodiment of the present invention;

5 is a schematic diagram of phase estimation and compensation according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the structural composition of a frequency offset and phase offset processing apparatus according to an embodiment of the present invention.

detailed description

In order to understand the characteristics and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present invention.

The current traditional method is to process the frequency offset and phase offset separately, that is, the signal first enters the frequency offset processing module for frequency offset compensation and estimation, and then enters the phase offset processing module for phase estimation and compensation. Referring to FIG. 1 , it can be seen from the figure that the frequency offset and phase offset processing mainly includes two parts: frequency offset compensation/frequency offset estimation and phase estimation/phase compensation. The polarization state X input signal and the polarization state Y input signal enter into frequency offset compensation. The polarization state X signal and polarization state Y signal after frequency offset compensation are divided into two channels. The first channel enters the quartic frequency offset estimation for frequency offset estimation, and then outputs the estimated frequency offset compensation value to the frequency offset compensation ;The first path enters phase estimation/phase compensation, performs phase estimation, and then outputs the estimated phase compensation value to phase compensation; the second path enters phase compensation, performs calculations with the estimated phase compensation value, and obtains the final result output.

In the above processing, the signals are all in the form of Cartesian coordinates. In this way, in the quartic frequency offset estimation and the quartic phase estimation, it is necessary to perform two quartic calculations respectively. Since the signal is in the form of Cartesian coordinates, the power consumption and resource consumption of the quartic processing are very high. Big. In frequency offset compensation and phase compensation, since the signal is in the form of Cartesian coordinates, in the processing of this signal, the calculation of Cartesian coordinates and angle values also leads to relatively large resource consumption and slow calculation processing speed.

In the technical solution of the embodiment of the present invention, according to the characteristics of frequency offset processing and phase offset processing, the two are analyzed, frequency offset compensation and phase compensation are both data and angle value compensation; frequency offset estimation and phase estimation are both used The method of quartic estimation needs to process the data to the quartic. To this end, coordinate transformation is carried out on the signals of the two polarization states, and the signal is converted from the Cartesian coordinate system to the polar coordinate system, so that it is at the same latitude as the angle value of compensation, so that the multiplication operation is transformed into an addition operation, and the resource , Power consumption and speed are optimized. Moreover, the embodiment of the present invention extracts the quartic estimation as a common part. At the same time, the fourth power also adopts the polar coordinate system, that is, simply do a quadrupling process for the angle, so that the fourth power operation (three multiplications and one addition) is transformed into a shifting process. The implementation scheme of the embodiment of the present invention is simple, the hardware is easy to implement, and the robustness of the system is improved; the hardware resource consumption is low, and the power consumption is low. In actual implementation, compared with the traditional method, the resources are reduced by 40%, and the cost is reduced; the calculation speed is improved. thereby improving performance.

Figure 2 is a schematic flow chart of a frequency offset and phase offset processing method according to an embodiment of the present invention. The frequency offset and phase offset processing method in this example is applied to a frequency offset and phase offset processing device, as shown in Figure 2, the frequency offset and phase offset processing The method includes the following steps:

Step 201: Transform the first polarized signal and the second polarized signal in the Cartesian coordinate system into the third polarized signal and the fourth polarized signal in the polar coordinate system, respectively.

In the embodiment of the present invention, the first polarized signal and the second polarized signal are two orthogonal polarized signals.

Step 202: Perform frequency offset compensation on the third polarized signal and the fourth polarized signal respectively, to obtain a fifth polarized signal and a sixth polarized signal after frequency offset compensation.

In the embodiment of the present invention, in the polar coordinate system, the angle value of the third polarization signal is added to the estimated frequency offset compensation value to obtain the fifth polarization signal after frequency offset compensation;

In the polar coordinate system, adding the angle value of the fourth polarization signal to the estimated frequency offset compensation value to obtain the sixth polarization signal after frequency offset compensation;

Wherein, the frequency offset compensation value is an angle value.

Step 203: Divide the fifth polarization signal and the sixth polarization signal into two paths, use the first path signal to perform quartic frequency offset estimation to obtain a frequency offset compensation value; use the intermediate data of the quartic frequency offset estimation to perform Quartic phase estimation to get the phase compensation value.

In the embodiment of the present invention, the fifth polarized signal is divided into two paths, and the sixth polarized signal is divided into two paths; one path of the fifth polarized signal and one path of the sixth polarized signal are used as the first path signal, and the Another fifth polarized signal and another sixth polarized signal serve as the second signal.

In the embodiment of the present invention, the first channel signal is used to perform quartic frequency offset estimation to obtain a frequency offset compensation value, so as to perform frequency offset compensation on the third polarized signal and the fourth polarized signal; using quartic frequency offset estimation The fourth power phase estimation is performed on the intermediate data to obtain a phase compensation value, so as to perform phase compensation on the fifth polarization signal and the sixth polarization signal.

Step 204: For the second signal, perform phase compensation on the fifth polarization signal and the sixth polarization signal by using the phase compensation value, to obtain a phase-compensated seventh polarization signal and an eighth polarization signal.

Step 205: Transform the seventh polarization signal and the eighth polarization signal in the polar coordinate system into the ninth polarization signal and the tenth polarization signal in the Cartesian coordinate system, respectively.

In the embodiment of the present invention, the ninth polarized signal and the tenth polarized signal are two orthogonal polarized signals, and the ninth polarized signal is obtained by performing frequency offset and phase offset compensation processing on the first polarized signal signal, the tenth polarized signal is a signal obtained by performing frequency offset and phase offset compensation processing on the second polarized signal.

The frequency offset and phase offset processing method of the embodiment of the present invention will be further described in detail below in conjunction with the frequency offset and phase offset processing block diagram shown in FIG. 3 .

As shown in Figure 3, the polarization state X input signal and the polarization state Y input signal are first subjected to polar coordinate conversion processing, and the Cartesian coordinate form is converted into a polar coordinate form, and then sent to frequency offset compensation. During frequency offset compensation, the signal Directly add the angle value and the estimated frequency offset compensation value to obtain the signal after frequency offset compensation, which is expressed in polar coordinates at this time. The polarization state X signal and the polarization state Y signal after frequency offset compensation are divided into two paths, one path enters the quartic frequency offset estimation, performs frequency offset estimation, and then outputs the estimated frequency offset compensation value to the frequency offset compensation, and The intermediate data of the fourth frequency offset estimation is sent to the fourth power phase estimation for data multiplexing, and the fourth power phase estimation directly uses this intermediate data for phase estimation to obtain the phase compensation value; the other way enters the phase compensation, and the estimated The phase compensation value is calculated, and then the coordinate conversion is performed, and the polar coordinates are converted into Cartesian coordinates to obtain the final result output.

In the frequency offset processing module, coordinate conversion is performed on the input polarization state X and Y signals, and the expression of the real part/imaginary part of the complex signal is converted into the expression of the amplitude/angle; and then the frequency offset provided is estimated according to the fourth power frequency offset The compensation value is used to compensate the frequency offset of the signal; the signal after frequency offset compensation is sent to the quartic frequency offset estimation to calculate the error between the current frequency offset compensation value and the real frequency offset compensation value; at the same time, the compensated polarization The state X/Y signal and the fourth power signal (polar coordinate form) are sent to the phase offset processing module.

In the phase offset processing module, the phase compensation is performed on the output signal of the frequency offset compensation, and the coordinate conversion is performed after the phase compensation, and the polar coordinate representation is converted into the real part/imaginary part of the complex signal and then sent to the subsequent module; for Saving resources and improving processing speed, the quartic phase estimation multiplexes the quartic output of the quartic frequency offset estimation to calculate the intermediate results, and uses the output signal of the frequency offset compensation to calculate the phase compensation value and output it to the phase compensation module .

The frequency offset processing module of the embodiment of the present invention will be described in detail below with reference to FIG. 4 . As shown in Figure 4, after using the Cordic function to convert the negative signal on the X and Y polarization states from the representation of the real part/imaginary part to the polar coordinate representation of the amplitude/angle, then the frequency offset compensation is simplified to the angle value of the signal Add it to the frequency offset compensation value. The signals after frequency offset compensation on the X and Y polarization states enter their respective fourth power residual frequency offset estimation modules, and calculate the phase difference of the fourth power results of two signals at adjacent n positions, and then obtain the continuous N results are accumulated, the angle value is calculated and then divided by four to obtain the residual frequency offset compensation value between the real frequency offset compensation value of the signal and the frequency offset compensation value output by the loop.

There are two working modes for frequency offset estimation, and the support registers can be configured.

Mode 0:

In the quartic residual frequency offset estimation of the X polarization state, the n value is adaptively selected as 1, 2, 4, 8, ..., nmax, where nmax can take the value of 1, 2, 4, 8, 16, and the support register can be configured . The N value is fixed at 2048.

In the fourth power residual frequency offset estimation of the Y polarization state, the value of n is 1, and the value of N is 32768. The estimated residual frequency offset compensation value of the Y polarization state is used as a basis for judging whether phase ambiguity occurs in the residual frequency offset compensation value of the X polarization state.

Through switch selection, the fourth power residual frequency offset estimation result of the X polarization state is sent to the second-order loop filter.

Mode 1:

The estimation of the fourth power residual frequency offset of X and Y polarization states is the same, and the value of n is 1, and N is 32768.

Through the switch selection, the estimation results of the fourth power residual frequency offset of the X and Y polarization states are averaged and then sent to the loop filter.

After the output signal of the loop filter is integrated and limited, an estimated value of the frequency offset angle is obtained. The frequency offset compensation angle value output by the previous loop plus the estimated value of the frequency offset angle is the current loop output frequency offset compensation angle value, which is used for frequency offset compensation of the next signal.

Fig. 5 is a schematic diagram of phase estimation and compensation according to an embodiment of the present invention. As shown in Fig. 5, it is assumed that the phase θ _k of the received signal = θ _s (k) + ΔωkT _i + θ _n + θ _ASE , where θ _s (k ) represents the original signal phase, ΔωkT _i represents the frequency offset phase, θ _n represents the phase deviation phase, and θ _ASE represents the noise phase. The frequency offset phase ΔωkT _i is removed by the previous frequency offset estimation, and the remaining phase is: θ _s (k) + θ _n + θ _ASE ; after θ _s (k) + θ _n + θ _ASE is processed to the fourth power, Get V ⁴ (k)=exp{j4θ _s (k)}·exp{j4θ _n }·exp{j4θ _ASE } processing, assuming Then V ⁴ (k) can remove the original signal phase. Then a low pass filter (LPF, Low Pass Filter) is used to remove the noise phase θ _ASE (addition of multiple V ⁴ (k)), and then the argument is extracted to obtain a result of phase deviation. That is represented by the following formula:

${\mathrm{<span\; class="notranslate">\; \&theta;</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; arg</span>}<span\; class="notranslate">\; \&lsqb;</span>\underset{\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}{\mathrm{<span\; class="notranslate">\; V</span>}}^{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&rsqb;</span>$

Among them, arg(z) represents the argument of the complex number z.

After the fourth power, the noise is also amplified. The noise amplification of the phase angle cannot be avoided, but the noise amplification of the amplitude can be minimized. Therefore, the above formula can be optimized as:

${\mathrm{<span\; class="notranslate">\; \&theta;</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; arg</span>}<span\; class="notranslate">\; \&lsqb;</span>\underset{\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}\mathrm{<span\; class="notranslate">\; a</span>}\mathrm{<span\; class="notranslate">\; b</span>}\mathrm{<span\; class="notranslate">\; the\; s</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; exp</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; arg</span>}<span\; class="notranslate">\; \&lsqb;</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&rsqb;</span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; \&rsqb;</span>$

That is, only the fourth power of the angle is processed. Among them, abs(z) represents the absolute value of z.

The phase compensation value obtained by the phase estimation is input to the phase compensation module for compensation, and after the compensation, the coordinate conversion is performed, and the converted form of Cartesian coordinates is output to the subsequent module.

When the frequency offset and phase offset processing device in the embodiment of the present invention is realized by functional units, refer to the structural composition schematic diagram of the frequency offset and phase offset processing device shown in Figure 6, as shown in Figure 6, the frequency offset and phase offset processing device include:

The first coordinate conversion unit 61 is configured to convert the first polarized signal and the second polarized signal in the Cartesian coordinate system into a third polarized signal and a fourth polarized signal in the polar coordinate system, respectively;

A frequency offset compensation unit 62, configured to perform frequency offset compensation on the third polarized signal and the fourth polarized signal respectively, to obtain the fifth polarized signal and the sixth polarized signal after frequency offset compensation;

The quartic frequency offset estimation unit 63 is configured to divide the fifth polarization signal and the sixth polarization signal into two paths, and use the first path signal to perform quartic frequency offset estimation to obtain a frequency offset compensation value;

The quartic phase estimation unit 64 is used to perform quartic phase estimation using the intermediate data of quartic frequency offset estimation to obtain a phase compensation value;

The phase compensation unit 65 is configured to use the phase compensation value to perform phase compensation on the fifth polarization signal and the sixth polarization signal for the second signal, so as to obtain a phase-compensated seventh polarization signal and an eighth polarization signal;

The second coordinate conversion unit 66 is configured to convert the seventh polarization signal and the eighth polarization signal in the polar coordinate system into the ninth polarization signal and the tenth polarization signal in the Cartesian coordinate system, respectively.

In the embodiment of the present invention, the frequency offset compensation unit 62 includes:

The first frequency offset compensation subunit 621 is configured to add the angle value of the third polarization signal to the estimated frequency offset compensation value in the polar coordinate system to obtain the fifth polarization signal after frequency offset compensation ;

The second frequency offset compensation subunit 622 is configured to add the angle value of the fourth polarization signal to the estimated frequency offset compensation value in the polar coordinate system to obtain the sixth polarization signal after frequency offset compensation ;

Wherein, the frequency offset compensation value is an angle value.

In the embodiment of the present invention, the quartic frequency offset estimating unit 63 is further configured to use the first signal to perform quartic frequency offset estimation to obtain a frequency offset compensation value for the third polarized signal and the fourth polarized signal. Polarized signal for frequency offset compensation;

The quartic phase estimation unit 64 is further configured to use the intermediate data of quartic frequency offset estimation to perform quartic phase estimation to obtain a phase compensation value, so as to carry out phase calculation on the fifth polarized signal and the sixth polarized signal. compensate.

In the embodiment of the present invention, the first polarized signal and the second polarized signal are two orthogonal polarized signals.

In the embodiment of the present invention, the quartic frequency offset estimation unit 63 is further configured to divide the fifth polarization signal into two paths, and divide the sixth polarization signal into two paths; The signal and one sixth polarized signal are used as a first signal, and another fifth polarized signal and another sixth polarized signal are used as a second signal.

In the embodiment of the present invention, the ninth polarized signal and the tenth polarized signal are two orthogonal polarized signals, and the ninth polarized signal is obtained by performing frequency offset and phase offset compensation processing on the first polarized signal signal, the tenth polarized signal is a signal obtained by performing frequency offset and phase offset compensation processing on the second polarized signal.

Those skilled in the art should understand that the functions implemented by each unit in the frequency offset and phase offset processing apparatus shown in FIG. 6 can be understood with reference to the relevant description of the foregoing frequency offset and phase offset processing method. The functions of each unit in the frequency offset and phase offset processing device shown in FIG. 6 can be realized by a program running on a processor, or can be realized by a specific logic circuit.

Those skilled in the art should understand that the functions implemented by each unit in the electronic device in the embodiment of the present invention can be understood by referring to the relevant description of the aforementioned information processing method, and that each unit in the electronic device in the embodiment of the present invention can be understood by It can be realized by an analog circuit that realizes the functions described in the embodiments of the present invention, and can also be realized by running software that executes the functions described in the embodiments of the present invention on an intelligent terminal.

The technical solutions described in the embodiments of the present invention may be combined arbitrarily if there is no conflict.

In the several embodiments provided by the present invention, it should be understood that the disclosed methods and smart devices can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms of.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units; Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be fully integrated into a second processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention.

Claims (12)

1. A frequency offset phase offset processing method, characterized in that the method comprises: Converting the first polarized signal and the second polarized signal in the Cartesian coordinate system into a third polarized signal and a fourth polarized signal in the polar coordinate system, respectively; performing frequency offset compensation on the third polarized signal and the fourth polarized signal respectively, to obtain a fifth polarized signal and a sixth polarized signal after frequency offset compensation; Divide the fifth polarization signal and the sixth polarization signal into two paths, use the first path signal to perform quartic frequency offset estimation to obtain a frequency offset compensation value; use the intermediate data of the quartic frequency offset estimation to perform quartic Phase estimation, to obtain a phase compensation value; for the second signal, use the phase compensation value to perform phase compensation on the fifth polarization signal and the sixth polarization signal, to obtain the phase-compensated seventh polarization signal and eighth polarization signal ; Converting the seventh polarization signal and the eighth polarization signal in the polar coordinate system to the ninth polarization signal and the tenth polarization signal in the Cartesian coordinate system respectively. 2. The frequency offset and phase offset processing method according to claim 1, wherein the frequency offset compensation is performed on the third polarized signal and the fourth polarized signal respectively to obtain the fifth polarized signal after frequency offset compensation and a sixth polarized signal comprising: In a polar coordinate system, adding an angle value of the third polarization signal to an estimated frequency offset compensation value to obtain a fifth polarization signal after frequency offset compensation; In the polar coordinate system, adding the angle value of the fourth polarization signal to the estimated frequency offset compensation value to obtain the sixth polarization signal after frequency offset compensation; Wherein, the frequency offset compensation value is an angle value. 3. The frequency offset and phase offset processing method according to claim 1, characterized in that, the first channel signal is used to estimate the quartic frequency offset to obtain a frequency offset compensation value; The data is estimated by the fourth power phase to obtain the phase compensation value, including: performing quartic frequency offset estimation by using the first signal to obtain a frequency offset compensation value, so as to perform frequency offset compensation on the third polarization signal and the fourth polarization signal; Using the intermediate data of the quartic frequency offset estimation to perform quartic phase estimation to obtain a phase compensation value, so as to perform phase compensation on the fifth polarized signal and the sixth polarized signal. 4. The frequency offset and phase offset processing method according to any one of claims 1 to 3, wherein the first polarization signal and the second polarization signal are two orthogonal polarization signals. 5. The frequency deviation and phase deviation processing method according to claim 4, characterized in that, the ninth polarization signal and the tenth polarization signal are orthogonal two-way polarization signals, and the ninth polarization signal is The first polarized signal is a signal obtained by performing frequency offset and phase offset compensation processing, and the tenth polarized signal is a signal obtained by performing frequency offset and phase offset compensation processing on the second polarized signal. 6. The frequency deviation and phase deviation processing method according to claim 1, wherein the fifth polarization signal and the sixth polarization signal are divided into two paths, comprising: splitting the fifth polarized signal into two paths, and splitting the sixth polarized signal into two paths; A fifth polarized signal and a sixth polarized signal are used as a first signal, and another fifth polarized signal and a sixth polarized signal are used as a second signal. 7. A frequency offset phase offset processing device, characterized in that the device comprises: The first coordinate conversion unit is used to convert the first polarized signal and the second polarized signal in the Cartesian coordinate system into the third polarized signal and the fourth polarized signal in the polar coordinate system, respectively; a frequency offset compensation unit, configured to perform frequency offset compensation on the third polarized signal and the fourth polarized signal respectively, to obtain a fifth polarized signal and a sixth polarized signal after frequency offset compensation; a quartic frequency offset estimation unit, configured to divide the fifth polarization signal and the sixth polarization signal into two paths, and use the first path signal to perform quartic frequency offset estimation to obtain a frequency offset compensation value; The quartic phase estimation unit is used to perform quartic phase estimation using the intermediate data of quartic frequency offset estimation to obtain a phase compensation value; A phase compensation unit, configured to use the phase compensation value to perform phase compensation on the fifth polarization signal and the sixth polarization signal for the second signal, to obtain a phase-compensated seventh polarization signal and an eighth polarization signal; The second coordinate conversion unit is configured to convert the seventh polarized signal and the eighth polarized signal in the polar coordinate system into the ninth polarized signal and the tenth polarized signal in the Cartesian coordinate system, respectively. 8. The frequency offset and phase offset processing device according to claim 7, wherein the frequency offset compensation unit comprises: The first frequency offset compensation subunit is configured to add the angle value of the third polarization signal to the estimated frequency offset compensation value in a polar coordinate system to obtain a fifth polarization signal after frequency offset compensation; The second frequency offset compensation subunit is configured to add the angle value of the fourth polarization signal to the estimated frequency offset compensation value in a polar coordinate system to obtain a sixth polarization signal after frequency offset compensation; Wherein, the frequency offset compensation value is an angle value. 9. The frequency offset and phase offset processing device according to claim 7, wherein the quartic frequency offset estimating unit is further configured to use the first signal to perform quartic frequency offset estimation to obtain frequency offset compensation value, to perform frequency offset compensation on the third polarized signal and the fourth polarized signal; The quartic phase estimation unit is further configured to use the intermediate data of quartic frequency offset estimation to perform quartic phase estimation to obtain a phase compensation value, so as to perform phase compensation on the fifth polarization signal and the sixth polarization signal . 10. The frequency offset and phase offset processing device according to any one of claims 7 to 9, wherein the first polarized signal and the second polarized signal are two orthogonal polarized signals. 11. The frequency deviation and phase deviation processing device according to claim 10, wherein the ninth polarization signal and the tenth polarization signal are two orthogonal polarization signals, and the ninth polarization signal is The first polarized signal is a signal obtained by performing frequency offset and phase offset compensation processing, and the tenth polarized signal is a signal obtained by performing frequency offset and phase offset compensation processing on the second polarized signal. 12. The frequency offset and phase offset processing device according to claim 7, wherein the quartic frequency offset estimation unit is further configured to divide the fifth polarization signal into two paths, and divide the fifth polarization signal The six-polarization signal is divided into two paths; one path of the fifth polarization signal and one path of the sixth polarization signal are used as the first path signal, and the other path of the fifth polarization signal and another path of the sixth polarization signal are used as the second path signal.