CN112187686B - Data processing method and device - Google Patents

Data processing method and device Download PDF

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CN112187686B
CN112187686B CN202010947449.4A CN202010947449A CN112187686B CN 112187686 B CN112187686 B CN 112187686B CN 202010947449 A CN202010947449 A CN 202010947449A CN 112187686 B CN112187686 B CN 112187686B
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frequency offset
offset parameter
weight
time
data processing
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CN112187686A (en
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延凯悦
张忠皓
冯毅
李福昌
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses a data processing method and device, relates to the technical field of communication, and is used for determining a Doppler frequency offset value. After acquiring the first frequency offset parameter and the second frequency offset parameter, the data processing device determines the change rule of the frequency offset value in a first time period; the first frequency offset parameter comprises a frequency offset value calculated according to a reference signal at a first moment; the second frequency offset parameter is used for demodulating the user data received at the second moment; the first time is located after the second time; the first time is the time at which the first time period ends. Finally, the data processing device determines a target frequency offset parameter according to the first frequency offset parameter, the second frequency offset parameter and the change rule; the target frequency offset parameter is used for demodulating the user data received at the first time. The embodiment of the invention is applied to a communication environment running at a high speed.

Description

Data processing method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data processing method and apparatus.
Background
In a communication environment of high-speed movement (for example, air-to-ground communication, terrestrial high-speed rail communication, and low-orbit satellite communication), a doppler effect caused by relative motion of both communication parties causes a large doppler frequency offset to be generated in a communication system of both communication parties, which causes a problem in demodulating user data by a party receiving data. In order to solve the above problem, it is common that the data receiving side calculates a frequency offset value from the received reference signal, and can demodulate the received user data using the calculated frequency offset value.
However, in a scenario where the moving speeds of both communication parties change greatly, for example, in the process of accelerating or decelerating a high-speed railway train or a spacecraft, the doppler frequency offset generated by the doppler effect has time-varying characteristics, that is, in different communication environments, the doppler frequency offset is constantly in a varying state, and at this time, a frequency offset value calculated by one side receiving data according to a reference signal is inaccurate, and it is difficult to correctly demodulate user data.
Disclosure of Invention
The embodiment of the invention provides a data processing method and a data processing device, which are used for determining a Doppler frequency offset value.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a data processing method is provided, including: acquiring a first frequency offset parameter and a second frequency offset parameter; the first frequency offset parameter comprises a frequency offset value calculated according to a reference signal at a first moment; the second frequency offset parameter is used for demodulating the user data received at a second moment; the first time is after the second time; determining a change rule of the frequency offset value in a first time period; wherein the first time is the time when the first time period ends; determining a target frequency offset parameter according to the first frequency offset parameter, the second frequency offset parameter and the change rule; wherein the target frequency offset parameter is used for demodulating the user data received at the first time.
In a second aspect, a data processing apparatus is provided, which includes an acquisition unit and a determination unit; the acquiring unit is used for acquiring a first frequency offset parameter and a second frequency offset parameter; the first frequency offset parameter comprises a frequency offset value calculated according to a reference signal at a first moment; the second frequency offset parameter is used for demodulating the user data received at a second moment; the first time is after the second time; the determining unit is used for determining a change rule of the frequency offset value in a first time period; wherein the first time is the time when the first time period ends; the determining unit is further configured to determine a target frequency offset parameter according to the first frequency offset parameter, the second frequency offset parameter, and the change rule; wherein the target frequency offset parameter is used to demodulate the user data received at the first time.
In a third aspect, there is provided a computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computer, cause the computer to perform the data processing method of the first aspect.
In a fourth aspect, a data processing apparatus is provided, including: a processor, a memory, and a communication interface; the communication interface is used for the data processing device to communicate with other equipment or a network; the memory is used for storing one or more programs, the one or more programs include computer executable instructions, and when the data processing device runs, the processor executes the computer executable instructions stored in the memory, so that the data processing device executes the data processing method in the first aspect.
In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the data processing method of the first aspect.
The embodiment of the invention provides a data processing method and a data processing device, which are applied to determining a Doppler frequency offset value generated in high-speed operation. In consideration of the fact that the change magnitude and change rule of the frequency offset value are different along with the change of the communication environment of the receiver in the moving process of the two communication parties, the technical scheme of the application can combine different change rules of the frequency offset value in different communication environments, takes the second frequency offset parameter before the first moment as the basis for correcting the first frequency offset parameter, fully considers the change rule of the frequency offset value in the communication environment and the correlation between the second frequency offset parameter and the real frequency offset value at the first moment before the first moment, and can enable the corrected frequency offset value to be closer to the actual frequency offset value, thereby providing a basis for adjusting the receiving performance of the communication system in different communication environments.
Drawings
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;
FIG. 2A is a schematic diagram illustrating a first data processing method according to an embodiment of the present invention;
FIG. 2B is a schematic diagram of a data processing method according to an embodiment of the present invention;
fig. 3 is a first flowchart illustrating a data processing method according to an embodiment of the present invention;
fig. 4A is a schematic diagram of a data processing method according to an embodiment of the present invention;
fig. 4B is a schematic diagram of a data processing method according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of a data processing method according to an embodiment of the present invention;
fig. 6 is a third schematic flowchart of a data processing method according to an embodiment of the present invention;
fig. 7 is a fourth schematic flowchart of a data processing method according to an embodiment of the present invention;
FIG. 8 is a first block diagram illustrating a data processing apparatus according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a data processing apparatus according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a data processing apparatus according to an embodiment of the present invention;
fig. 11 is a fourth schematic structural diagram of a data processing apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
In the description of the present invention, "/" means "or" unless otherwise specified, for example, a/B may mean a or B. "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.
The doppler frequency offset is a frequency offset caused by the doppler effect when both communication parties move in a communication system. Generally, when the two parties of communication move toward each other, the frequency of data reception by the party receiving data is higher than the frequency of data transmission by the party transmitting data. When the two communication parties move relatively in opposite directions, the frequency of data receiving of the data receiving party of the two communication parties is lower than the frequency of data transmitting of the data transmitting party of the two communication parties. In an Orthogonal Frequency Division Multiplexing (OFDM) multi-carrier communication system, there are a plurality of subcarriers, and the doppler effect caused by the subcarriers causes inter-carrier interference with the movement of both communication parties, which deteriorates the performance of the communication system.
The data interacted between the two communication parties comprises a reference signal and user data, one party receiving the data acquires the reference signal from the received data in order to correctly demodulate the received user data, calculates a doppler frequency offset value (which may also be referred to as a frequency offset value for short) according to the reference signal, and demodulates the user data according to the acquired doppler frequency offset value. However, in a communication environment where both communication parties move at high speed, the doppler frequency offset value caused by an increase or decrease in the speed or acceleration of both communication parties with respect to a relative movement (for example, during the start or stop of a high-speed train, or the acceleration or deceleration of a low-orbit satellite) changes with time, which causes the doppler frequency offset value calculated by the above-described method to be inaccurate, and thus user data cannot be correctly demodulated.
The invention provides a data processing method.A data processing device determines a change rule of a Doppler frequency offset value before a first moment (namely reflecting speed change rules of two communication parties before the first moment) after acquiring a first frequency offset parameter (a Doppler frequency offset value) obtained by calculation according to a reference signal of the first moment and a second frequency offset parameter used for demodulating user data of a second moment, and further determines a target frequency offset parameter for demodulating the user data of the first moment according to the first frequency offset parameter, the second frequency offset parameter and the change rule so as to correctly demodulate the user data received at the first moment.
The data processing method provided by the embodiment of the invention can be suitable for a communication system. Fig. 1 shows a structure of the communication system, and as shown in fig. 1, a communication system 10 provided by an embodiment of the present invention includes a communication device 11 and a communication device 12. Wherein, the communication device 11 and the communication device 12 can perform data interaction.
The communication device 11 and the communication device 12 respectively include a receiver (taking fig. 1 as an example, the communication device 11 includes the receiver 111, and the communication device 12 includes the receiver 121, and since the functions of the receivers in each communication device are the same, in the description of the subsequent receiver of the present invention, the receiver 111 is taken as an example for description, and the subsequent description is not repeated), and a transmitter (taking fig. 1 as an example, the communication device 11 includes the transmitter 112, and the communication device 12 includes the transmitter 122). The receiver 111 is configured to receive data sent by other communication devices, calculate a doppler frequency offset value according to a reference signal in the data, and demodulate user data in the received data according to the calculated doppler frequency offset value. The transmitter is used for modulating to obtain user data and sending data containing the user data outwards.
The communication device 11 and the communication device 12 further include a data processing apparatus respectively (marked as a data processing apparatus 13 and a data processing apparatus 14 in fig. 1, since the data processing apparatus 13 and the data processing apparatus 14 have the same function and function, in the following description of the embodiment of the present invention, the data processing apparatus 13 is taken as an example to describe the data processing method provided in the embodiment of the present invention, and the following description is not repeated again). The data processing device 13 is connected to the receiver 111 in the communication device 11, and the data processing device 13 is configured to obtain a frequency offset parameter (doppler frequency offset value) from the receiver 111 of the network device 11 and execute a corresponding data processing method.
The communication method between the data processing device 13 and the receiver 111 may be a wired connection method or a wireless connection method.
The communication system 10 may illustratively be a communication system in a wireless communication environment, or may be a communication system in a satellite communication environment. When the communication system 10 is a wireless communication environment, one of the communication device 11 and the communication device 12 may be a base station (bs), and the other may be a Mobile Station (MS). When communication system 10 is a satellite communication environment, one of communication device 11 and communication device 12 may be a satellite and the other may be an earth station.
As shown in fig. 1. The data processing device 13 is located in the communication device 11, and in practical applications, the data processing device 13 may be located outside the communication device as a separate device, or may be located in the receiver 111 of the communication device 11, which is not limited in the present invention.
It should be noted that, when the data processing device 13 is located outside the communication device 13 as a separate device, the data processing device 13 is connected to the communication device 11.
When the data processing device 13 is located outside the communication device 11 as a separate device, the communication mode between the data processing device 13 and the communication device 11 may be a wired connection or a wireless connection.
When the data processing device 13 and the receiver 111 of the communication device 11 are integrated in the same device, the communication mode between the data processing device 13 and the receiver 111 of the communication device 12 is the communication between the internal modules of the receiver 111. In this case, the communication flow between the two is the same as the "communication flow between the data processing device 13 and the receiver 111 of the communication apparatus 11" when they are independent of each other.
In the following embodiments provided by the present invention, the present invention is explained by taking an example in which the data processing device 13 and the receiver 111 are provided independently of each other.
The principle of the data processing method provided by the present invention is described below with reference to fig. 1.
As shown in fig. 2A, after the receiver 111 in the embodiment of the present invention receives data sent by the communication device 12 at a second time before the first time, a frequency offset parameter (corresponding to the second frequency offset parameter in the embodiment of the present invention) for demodulating user data in the data received at the second time is determined according to a reference signal in the data, and the second frequency offset parameter is stored in a memory of the receiver 111. It should be noted that the second frequency offset parameter is a frequency offset value obtained by calculating a frequency offset value (corresponding to the third frequency offset parameter in the embodiment of the present invention) according to the reference signal received at the second time, and then correcting the third frequency offset parameter by using the data processing method provided in the embodiment of the present invention or by using another method. At the first time, after the receiver 111 receives the data sent by the communication device 12, the reference signal and the user data in the data are obtained, a doppler frequency offset value (corresponding to the first frequency offset parameter in the embodiment of the present invention) is calculated according to the reference signal, and the calculated doppler frequency offset value is stored in the memory of the receiver 111. After the receiver 111 calculates the first frequency offset parameter, the data processing apparatus 13 obtains the first frequency offset parameter and the second frequency offset parameter from the memory of the receiver 111. Meanwhile, the data processing device 13 determines a change law of the doppler frequency offset value in a preset time period before the first time. Wherein, the change rule can reflect the change of the relative moving speed between the communication devices in the communication system. Then, the data processing apparatus 13 may determine, according to the first frequency offset parameter, the second frequency offset parameter and the variation rule, a frequency offset value (corresponding to the target frequency offset parameter in the embodiment of the present invention) for demodulating the user data received at the first time, so that the receiver 111 can correctly demodulate the user data received at the first time.
Fig. 2B shows doppler frequency offset values corresponding to the first time and the second time corresponding to fig. 2A, where t is time, the first time corresponds to the first frequency offset parameter, the doppler frequency offset value corresponding to the second time includes the second frequency offset parameter and the third frequency offset parameter, the preset time period is a first time period, and the first time period includes the first time and the second time, as shown in fig. 2B.
The following describes a data processing method provided by an embodiment of the present invention with reference to the drawings.
As shown in fig. 3, the data processing method provided by the embodiment of the present invention includes S201 to S203:
s201, the data processing device 13 obtains a first frequency offset parameter and a second frequency offset parameter.
The first frequency offset parameter comprises a frequency offset value calculated according to a reference signal at a first moment. The second frequency offset parameter is used to demodulate the user data received at the second time. The first time is after the second time.
As a possible implementation manner, the data processing apparatus 13 may query the memory of the receiver 111 for the first frequency offset parameter and the second frequency offset parameter according to the first time and the second time.
As another possible implementation, the reference signal at each time is stored in the memory of the receiver 111. The data processing apparatus 13 may obtain the reference signal received at the first time and the reference signal received at the second time from the memory of the receiver 111, and calculate to obtain the first frequency offset parameter according to the reference signal received at the first time, and obtain the second frequency offset parameter according to the reference signal received at the second time.
The first time and the second time may be continuous times when data is received, or may be discontinuous times when data is received.
In the embodiment of the present invention, the doppler frequency offset value used for demodulating the user data is calculated according to the reference signal, which may specifically refer to the prior art, and will not be described herein and in the following.
For example, in a case where the communication device 11 and the communication device 12 form a 5G communication network, taking a Physical Downlink Shared Channel (PDSCH) of a fifth Generation mobile communication system (5th Generation, 5G) protocol as an example, the reference signal may be at least a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS), and a basic time unit for dividing the first time, the second time, and the third time may be a slot.
In one case, when the receiver 111 demodulates the user data received at the second time according to the reference signal received at the second time, if the frequency offset value calculated according to the reference signal is corrected (by using the data processing method provided by the embodiment of the present invention or another method), and the user data is demodulated by using the corrected frequency offset value, the second frequency offset parameter obtained according to the reference signal received at the second time is the corrected frequency offset value.
In another case, when the receiver 111 demodulates the user data received at the second time according to the reference signal received at the second time, if the frequency offset value calculated according to the reference signal is not corrected, and the user data is directly demodulated by using the calculated frequency offset value, the second frequency offset parameter obtained according to the reference signal received at the second time is the frequency offset value calculated according to the reference signal received at the second time.
S202, the data processing device 13 determines a change rule of the frequency offset value in the first time period.
The first time is the time when the first time period ends.
As a possible implementation manner, the data processing apparatus 13 obtains, from a memory of the receiver 111, frequency offset values calculated at multiple times in the first time period and a frequency offset value used for demodulating user data, and determines a variation rule of the frequency offset value in the first time period.
It should be noted that the first time period includes the second time, and the starting time of the first time period is any time before the second time.
The change rule of the frequency offset value in the first time period indirectly reflects the change of the relative speed between the two communication parties in the communication system.
It can be understood that, in the process of starting and leaving the station of the high-speed train, the relative speeds of the two communication parties are continuously increased in the first time period, and the change rule of the frequency offset value in the first time period is monotonically increased and the increase is large.
S203, the data processing device 13 determines a target frequency offset parameter according to the first frequency offset parameter, the second frequency offset parameter and the change rule.
The target frequency offset parameter is used for demodulating the user data received at the first time.
As a possible implementation manner, the data processing apparatus 13 performs weighted calculation on the first frequency offset parameter and the second frequency offset parameter, and sets different weights for the first frequency offset parameter and the second frequency offset parameter according to different change rules.
It should be noted that, after determining the target frequency offset parameter, the data processing apparatus 13 sends the target frequency offset parameter to the receiver 111.
It can be understood that, the data processing apparatus 13 can combine different variation laws of the frequency offset value in different communication environments, take the second frequency offset parameter before the first time as a basis for correcting the first frequency offset parameter, and fully consider the variation law of the frequency offset value in the communication environment and the correlation between the second frequency offset parameter and the real frequency offset value at the first time before the first time, so that the determined frequency offset value can be closer to the actual frequency offset value of the user data received at the first time.
The following describes how to determine the principle of the change rule of the frequency offset value in the first time period in the data processing method according to the embodiment of the present invention with reference to the drawings.
Referring to fig. 2A, as shown in fig. 4A, after the receiver 111 in the embodiment of the present invention receives data sent by the communication device 12 at a third time before the second time, a doppler frequency offset parameter (corresponding to a fourth frequency offset parameter in the embodiment of the present invention) is calculated according to a reference signal in the data, and the calculated fourth frequency offset parameter is stored in the memory. Then, after receiving the data sent by the communication device 12 at the second time, the receiver 111 calculates a doppler shift parameter (corresponding to the third frequency shift parameter in the embodiment of the present invention) according to the reference signal in the data, and stores the calculated third frequency shift parameter in the memory. Further, the data processing apparatus 13 may obtain the first frequency offset parameter, the second frequency offset parameter (the result of correcting the third frequency offset parameter by the receiver 111), the third frequency offset parameter, and the fourth frequency offset parameter from the memory of the receiver 111, and may determine a change rule of the frequency offset value in the first time period according to the first frequency offset parameter, the second frequency offset parameter, the third frequency offset parameter, and the fourth frequency offset parameter. The third time may be a starting time of the first time period.
Fig. 4B shows doppler shift values corresponding to the respective time instants shown in fig. 4A, where, as shown in fig. 4B, the first time instant corresponds to the first frequency shift parameter, the second time instant corresponds to the second frequency shift parameter and the third frequency shift parameter, and the third time instant corresponds to the fourth frequency shift parameter. The starting time of the first time period is the third time, and the ending time of the first time period is the first time.
It can be understood that the frequency offset values calculated from the reference signals received at multiple times in the first time period and the correction result of the frequency offset value calculated from the reference signal received at the second time can reflect the change rule of the actual frequency offset value in the first time period.
A method for determining a change rule of a frequency offset value in a first time period in a data processing method according to an embodiment of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 3, as shown in fig. 5, S202 provided in the embodiment of the present invention specifically includes S2021 to S2022:
s2021, the data processing device 13 obtains the third frequency offset parameter and the fourth frequency offset parameter.
The third frequency offset parameter comprises a frequency offset value calculated according to the reference signal at the second moment, and the fourth frequency offset parameter comprises a frequency offset value calculated according to the reference signal at the third moment. The second time is after the third time.
As a possible implementation manner, the data processing apparatus 13 may query the memory of the receiver 111 for the third frequency offset parameter and the fourth frequency offset parameter according to the second time and the third time.
It should be noted that, in the memory of the receiver 111, the second time may correspond to two frequency offset values, which are the second frequency offset parameter and the third frequency offset parameter, respectively. Specifically, the second frequency offset parameter and the third frequency offset parameter are distinguished, and may be performed according to a preset rule.
For example, the receiver 111 may set different types for the frequency offset parameters in the memory, for example, the second frequency offset parameter is a correction value, and the third frequency offset parameter is a calculated value. The data processing device 13 may perform query according to the type of the frequency offset parameter in the process of obtaining the frequency offset parameter.
As another possible implementation, the reference signal at each time is stored in the memory of the receiver 111. The data processing apparatus 13 may obtain the reference signal received at the second time and the reference signal received at the third time from the memory of the receiver 111, and calculate to obtain the third frequency offset parameter according to the reference signal received at the second time, and calculate to obtain the fourth frequency offset parameter according to the reference signal received at the third time.
In both of the above-described implementations, the third time may be any one of a plurality of times of receiving the data transmitted by the communication device 12 before the second time.
In one design, the time interval between the first time and the second time may be the same as the time interval between the second time and the third time.
S2022, the data processing device 13 determines a change rule according to the first frequency offset parameter, the second frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter, and the first preset formula.
Wherein, change the law and specifically include: and whether the change amplitude of the frequency offset value exceeds a preset range in the first time period, and whether the change of the frequency offset value is monotonous under the condition that the change amplitude exceeds the preset range. The first time period is specifically a time from the third time to the first time.
It should be noted that the preset range may be preset in the data processing device 13 by the operation and maintenance staff.
As a possible implementation manner, the data processing apparatus 13 inputs the first frequency offset parameter, the second frequency offset parameter, the third frequency offset parameter, and the fourth frequency offset parameter into the following formula one (corresponding to a first preset formula in the embodiment of the present invention), and determines a change rule of the frequency offset value in the first time period according to an output result:
Figure BDA0002675782320000101
wherein, T 1 To characterize the output of the law of change of the frequency offset value over the first time period,
Figure BDA0002675782320000102
as a first frequency offset parameter,
Figure BDA0002675782320000103
as a second frequency offset parameter, is,
Figure BDA0002675782320000104
is a third frequency offset parameter, and is,
Figure BDA0002675782320000105
is a fourth frequency offset parameter.
As can be appreciated, it is possible to,
Figure BDA0002675782320000106
whether the frequency offset value changes monotonically in the first time period or not can be reflected by the positive and negative values of (1), if so
Figure BDA0002675782320000107
If the result of (1) is positive, it indicates that the change of the frequency offset value in the first time period is monotonic, and correspondingly, if so, the change of the frequency offset value in the first time period is monotonic
Figure BDA0002675782320000108
If the result of (3) is positive, it indicates that the change of the frequency offset value in the first time period is non-monotonic.
Figure BDA0002675782320000109
The magnitude of (1) can reflect the magnitude of the change of the frequency offset value in the first time period, if
Figure BDA00026757823200001010
Within a certain numerical range, the change amplitude of the frequency offset value in the first time period is not beyond the preset range, and if the change amplitude is beyond the preset range, the change amplitude is within the preset range
Figure BDA00026757823200001011
If the value exceeds the certain value threshold, the change amplitude of the frequency offset value in the first time period exceeds the preset range.
In the first case, if α ≦ T 1 And if the frequency offset value is less than or equal to beta, indicating that the change amplitude of the frequency offset value in the first time period does not exceed the preset range.
Wherein α is a first preset threshold, α < 0, α has a negative correlation with the size of the preset range, that is, as the preset range becomes larger, the value of α becomes smaller. Beta is a second preset threshold value, beta is more than 0, and beta has positive correlation with the size of the preset range, namely the value of alpha is larger as the preset range is larger.
It should be noted that the first preset threshold and the second preset threshold may be preset in the data processing device 13 by the operation and maintenance personnel.
It will be appreciated that in the first case, the frequency offset value is in a state of steady change and no drastic fluctuation during the first period of time, which indirectly indicates that the relative moving speed between the two communicating parties fluctuates within a certain range.
In the second case, if T 1 If the frequency offset value is more than beta, the change amplitude of the frequency offset value in the first time period exceeds a preset range, and the change of the frequency offset value in the first time period is monotonous.
It is understood that, in the second case, the frequency offset value is in a state of continuously increasing or continuously decreasing during the first period, which indirectly indicates that the relative moving speed between the two communicating parties is continuously increasing or continuously decreasing.
In the third case, if T 1 If the frequency offset value is less than alpha, the change amplitude of the frequency offset value in the first time period exceeds a preset range, and the change of the frequency offset value in the first time period is non-monotonic.
It can be understood that, in the third case, the frequency offset value fluctuates sharply and fluctuates greatly in the first time, which indicates that the current communication environment is unstable and there is strong interference.
In one design, the first predetermined threshold and the second predetermined threshold may be opposite numbers to each other.
For example, the first preset threshold may be 0.01, and the second preset threshold may be set to-0.01.
By the method, the data processing device 13 can determine the change law of the frequency offset value in the first time period, and can provide a basis for determining the target frequency offset parameter.
In this embodiment of the present invention, in order to determine a target frequency offset parameter, with reference to fig. 3, as shown in fig. 6, S203 provided in this embodiment of the present invention specifically includes S2031:
s2031, the data processing device 13 performs weighted summation on the first frequency offset parameter and the second frequency offset parameter according to the change rule, so as to obtain a target frequency offset parameter.
As a possible implementation manner, the data processing apparatus 13 determines different weights for the first frequency offset parameter and the second frequency offset parameter according to different change rules.
In the first case, if the change rule is: and in the first time period, if the change amplitude of the frequency offset value does not exceed the preset range, the first weight of the first frequency offset parameter is smaller than the second weight of the second frequency offset parameter.
Wherein the sum of the first weight and the second weight is 1.
Correspondingly, the data processing device 13 inputs the first frequency offset parameter and the second frequency offset parameter into the following formula two, and calculates to obtain a target frequency offset parameter:
Figure BDA0002675782320000121
wherein the content of the first and second substances,
Figure BDA0002675782320000122
in order for the frequency offset parameter to be a target,
Figure BDA0002675782320000123
is a first frequency offset parameter, r 1 Is a first weight of a first frequency offset parameter,
Figure BDA0002675782320000124
is a second frequency offset parameter, r 2 Is a second weight, r, of a second frequency offset parameter 1 ＜r 2 ，r 1 +r 2 ＝1。
It should be noted that the first weight and the second weight may be set in the data processing device 13 in advance by an operation and maintenance person in practical application.
For example, the first weight may be set to 0.2, and the second weight may be set to 0.8.
It can be understood that, in the first case, the change amplitude of the doppler frequency offset value is not large, and the true frequency offset value of the doppler frequency offset is closer to the second frequency offset parameter, so that the second weight value using the second frequency offset parameter is larger, and the target frequency offset parameter obtained by calculation is closer to the true frequency offset value.
In the second case, if the change rule is: and in the first time period, the change amplitude of the frequency offset value exceeds a preset range, and the change of the frequency offset value is monotone change, so that the third weight of the first frequency offset parameter is greater than the fourth weight of the second frequency offset parameter.
And the sum of the third weight and the fourth weight is 1.
Correspondingly, the data processing device 13 inputs the first frequency offset parameter and the second frequency offset parameter into the following formula three, and calculates to obtain a target frequency offset parameter:
Figure BDA0002675782320000125
wherein, the first and the second end of the pipe are connected with each other,
Figure BDA0002675782320000126
in order for the frequency offset parameter to be a target,
Figure BDA0002675782320000127
is a first frequency offset parameter, r 3 Is a third weight of the first frequency offset parameter,
Figure BDA0002675782320000128
is a second frequency offset parameter, r 4 Is a fourth weight, r, of the second frequency offset parameter 3 ＞r 4 ，r 3 +r 4 ＝1。
It should be noted that the third weight and the fourth weight may be set in the data processing device 13 in advance by an operation and maintenance worker in practical application.
For example, the third weight may be set to 0.8, and the fourth weight may be set to 0.2.
It can be understood that, under the second condition, the doppler frequency offset value changes steadily and has a larger change amplitude, and the true frequency offset value of the doppler frequency offset is closer to the first frequency offset parameter, so that the third weight value of the first frequency offset parameter is larger, and the target frequency offset parameter obtained by calculation is closer to the true frequency offset value.
In the third case, if the change rule is: and in the first time period, the change amplitude of the frequency offset value exceeds the preset range, and the change of the frequency offset value is not monotonous, so that the fifth weight of the first frequency offset parameter is smaller than the sixth weight of the second frequency offset parameter, the fifth weight is smaller than the first weight, and the sixth weight is larger than the second weight.
Wherein the sum of the fifth weight and the sixth weight is 1.
Correspondingly, the data processing device 13 inputs the first frequency offset parameter and the second frequency offset parameter into the following formula four, and calculates to obtain a target frequency offset parameter:
Figure BDA0002675782320000131
wherein the content of the first and second substances,
Figure BDA0002675782320000132
in order for the frequency offset parameter to be a target,
Figure BDA0002675782320000133
is a first frequency offset parameter, r 5 Is a fifth weight of the first frequency offset parameter,
Figure BDA0002675782320000134
is a second frequency offset parameter, r 6 Is a sixth weight, r, of the second frequency offset parameter 5 ＜r 6 ，r 5 +r 6 ＝1，r 6 ＞r 2 。
It should be noted that the fifth weight and the sixth weight may be set in the data processing device 13 in advance by an operation and maintenance person in practical application.
For example, the fifth weight may be set to 0.1, and the second weight may be set to 0.9.
It can be understood that, under the third condition, the communication environment is greatly interfered, the doppler frequency offset value fluctuates up and down and changes violently, and the degree of uncertainty of the first frequency offset parameter is larger at this time, so that the sixth weight value using the second frequency offset parameter is larger and tends to refer to the second frequency offset parameter more, so that the calculated target frequency offset parameter is closer to the true frequency offset value.
In one case, if the receiver 111 does not have the third time (the communication apparatus 11 and the communication apparatus 12 do not have data interaction before the second time), the data processing apparatus 13 executes the above S201-S203 provided in the embodiment of the present invention after determining that the frequency offset parameter corresponding to any three times (including the first time, the second time, and a certain time after the first time and when the data transmitted by the communication apparatus 12 is received) is stored in the memory of the receiver 111.
In another case, if there is no second time in the receiver 111 (the communication apparatus 11 and the communication apparatus 12 do not interact with each other before the first time), the data processing apparatus 13 executes the above S201 to S203 provided in the embodiment of the present invention after determining that the frequency offset parameters corresponding to any three times (including the first time and some two times after the first time and when the data transmitted by the communication apparatus 12 is received) are stored in the memory of the receiver 111.
In one design, the second frequency offset parameter in the embodiment of the present invention is a frequency offset value obtained by correcting the third frequency offset parameter, and when the receiver demodulates the user data received at the second time, if the user data received at the second time is directly demodulated by using the third frequency offset parameter (the third frequency offset value is not corrected by using the data processing method or other methods provided in the embodiment of the present invention, or the third frequency offset parameter is not corrected), the second frequency offset parameter may not exist in the memory of the receiver 111.
Further, in order to execute the data processing method according to the embodiment of the present invention, as shown in fig. 7 with reference to fig. 3, in S201 of the data processing method according to the embodiment of the present invention, specifically, S2011-S2013:
s2011, the data processing apparatus 13 obtains the first frequency offset parameter.
It should be noted that, as for a specific implementation manner of this step, reference may be made to the specific implementation manner of S201, which is not described herein again.
S2012, the data processing device 13 determines whether the second frequency offset parameter exists.
As a possible implementation manner, the data processing apparatus 13 queries whether a second frequency offset parameter corresponding to the second time exists in the memory of the receiver 111, and the type of the frequency offset parameter is a correction value.
S2013, if the second frequency offset parameter does not exist, the data processing device 13 obtains the third frequency offset parameter as the second frequency offset parameter.
It should be noted that, for a specific implementation manner of obtaining the third frequency offset parameter in this step, reference may be made to the specific implementation manner of the S2021, which is not described herein again.
Correspondingly, in a case that the receiver does not correct the third frequency offset parameter, in order to determine a variation law of the frequency offset value in the first time period, as shown in fig. 7, the data processing method provided in the embodiment of the present invention further includes, after S2013, S204:
and S204, the data processing device 13 determines a change rule of the frequency offset value in the first time period according to the first frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter and a second preset formula.
As a possible implementation manner, the data processing apparatus 13 inputs the first frequency offset parameter, the third frequency offset parameter, and the fourth frequency offset parameter into the following formula five (corresponding to the second preset formula in the embodiment of the present invention), and determines a change rule of the frequency offset value in the first time period according to the output result:
Figure BDA0002675782320000141
wherein, T 2 For use in the case where the receiver is not correcting the third frequency offset parameterAn output result representing a change rule of the frequency offset value in the first time period,
Figure BDA0002675782320000142
as a first frequency offset parameter, is set,
Figure BDA0002675782320000151
is a third frequency offset parameter, and is,
Figure BDA0002675782320000152
is a fourth frequency offset parameter.
As can be appreciated, in
Figure BDA0002675782320000153
Whether the frequency offset value changes monotonically in the first time period or not can be reflected by the positive and negative values of (1), if so
Figure BDA0002675782320000154
If the result of (2) is positive, it indicates that the change of the frequency offset value in the first time period is monotonous, and correspondingly, if the change of the frequency offset value in the first time period is monotonous
Figure BDA0002675782320000155
If the result of (2) is positive, it indicates that the change of the frequency offset value in the first time period is non-monotonic.
Figure BDA0002675782320000156
The magnitude of (1) can reflect the magnitude of the change of the frequency offset value in the first time period, if
Figure BDA0002675782320000157
Within a certain numerical range, the change amplitude of the frequency offset value in the first time period is not beyond the preset range, and if the change amplitude is beyond the preset range, the change amplitude is within the preset range
Figure BDA0002675782320000158
If the value exceeds the certain value threshold, the change amplitude of the frequency offset value in the first time period exceeds the preset range.
Correspondingly, under the condition that the receiver does not correct the third frequency offset parameter, the change rule of the frequency offset value in the first time period is the same as the determination method of "correcting the third frequency offset parameter at the receiver to obtain the change rule of the frequency offset value in the first time period" under the condition of the second frequency offset parameter (the determination condition, the predetermined range, and the three determination results of the first predetermined threshold, the second predetermined threshold, and the change rule are the same), and details are not repeated here.
In another case, as shown in fig. 7, if the second frequency offset parameter exists, after S2012, the data processing method according to the embodiment of the present invention includes S2014:
s2014, the data processing device obtains a second frequency offset parameter.
It should be noted that, in the embodiment of the present invention, reference may be made to the specific implementation manner in S201.
With reference to fig. 7, the data processing apparatus according to the embodiment of the present invention may continue to execute S202-S203 after S2014.
In one design, the value of the second frequency offset parameter is the same as the value of the third frequency offset parameter without the receiver correcting the third frequency offset parameter. In the embodiment of the present invention, in order to determine a target frequency offset parameter, as shown in fig. 7, after S204, the data processing method provided in the embodiment of the present invention further includes S205:
s205, the data processing device 13 determines a target frequency offset parameter according to the first frequency offset parameter, the third frequency offset parameter and the change rule.
As a possible implementation manner, the data processing apparatus 13 determines different weights for the first frequency offset parameter and the third frequency offset parameter according to the change rule determined in S204, and performs weighted summation on the first frequency offset parameter and the third frequency offset parameter to obtain the target frequency offset parameter.
Under the condition that the receiver does not correct the third frequency offset parameter, if the change rule is as follows: and in the first time period, if the change amplitude of the frequency offset value does not exceed the preset range, the seventh weight of the first frequency offset parameter is smaller than the eighth weight of the third frequency offset parameter.
And the sum of the seventh weight and the eighth weight is 1.
Correspondingly, the data processing device 13 inputs the first frequency offset parameter and the third frequency offset parameter into the following formula six, and calculates to obtain a target frequency offset parameter:
Figure BDA0002675782320000161
wherein the content of the first and second substances,
Figure BDA0002675782320000162
in order for the frequency offset parameter to be a target,
Figure BDA0002675782320000163
is a first frequency offset parameter, r 7 Is a seventh weight of the first frequency offset parameter,
Figure BDA0002675782320000164
is a third frequency offset parameter, r 8 Is the eighth weight of the third frequency bias parameter, r 7 ＜r 8 ，r 7 +r 8 ＝1。
It should be noted that the seventh weight and the eighth weight may be set in the data processing device 13 in advance by an operation and maintenance person in practical application.
Illustratively, the seventh weight may be set to 0.2, and the eighth weight may be set to 0.8.
It can be understood that, under the above conditions, the change amplitude of the doppler frequency offset value is not large, and the true frequency offset value of the doppler frequency offset is closer to the third frequency offset parameter, so that the eighth weight value using the third frequency offset parameter is larger, and the target frequency offset parameter obtained by calculation can be closer to the true frequency offset value.
Under the condition that the receiver does not correct the third frequency offset parameter, if the change rule is as follows: in the first time period, the variation amplitude of the frequency offset value exceeds the preset range, and the variation of the frequency offset value is monotonous, so that the ninth weight of the first frequency offset parameter is greater than the tenth weight of the third frequency offset parameter.
And the sum of the ninth weight and the tenth weight is 1.
Correspondingly, the data processing device 13 inputs the first frequency offset parameter and the third frequency offset parameter into the following formula seven, and calculates to obtain a target frequency offset parameter:
Figure BDA0002675782320000165
wherein the content of the first and second substances,
Figure BDA0002675782320000166
in order for the frequency offset parameter to be a target,
Figure BDA0002675782320000167
is a first frequency offset parameter, r 9 Is a ninth weight of the first frequency offset parameter,
Figure BDA0002675782320000168
is a third frequency offset parameter, r 10 Is the tenth weight of the third frequency bias parameter, r 9 ＞r 10 ，r 9 +r 10 ＝1。
It should be noted that the ninth weight and the tenth weight may be set in the data processing device 13 in advance by an operation and maintenance person in practical application.
Illustratively, the ninth weight may be set to 0.8, and the tenth weight may be set to 0.2.
It can be understood that, under the above-mentioned circumstances, the doppler frequency offset value changes steadily and the amplitude of the change is large, and the true frequency offset value of the doppler frequency offset is closer to the first frequency offset parameter, so that the ninth weight value of the first frequency offset parameter is large, and the target frequency offset parameter obtained by calculation can be closer to the true frequency offset value.
Under the condition that the receiver does not correct the third frequency offset parameter, if the change rule is as follows: in the first time period, the variation amplitude of the frequency offset value exceeds the preset range, and the variation of the frequency offset value is not monotonous, then the eleventh weight of the first frequency offset parameter is smaller than the twelfth weight of the third frequency offset parameter, the eleventh weight is smaller than the seventh weight, and the twelfth weight is larger than the eighth weight.
Wherein the sum of the eleventh weight and the twelfth weight is 1.
Correspondingly, the data processing device 13 inputs the first frequency offset parameter and the third frequency offset parameter into the following formula eight, and calculates to obtain a target frequency offset parameter:
Figure BDA0002675782320000171
wherein the content of the first and second substances,
Figure BDA0002675782320000172
in order for the frequency offset parameter to be a target,
Figure BDA0002675782320000173
is a first frequency offset parameter, r 11 Is an eleventh weight of the first frequency offset parameter,
Figure BDA0002675782320000174
is a second frequency offset parameter, r 12 Is the twelfth weight, r, of the third frequency bias parameter 11 ＜r 12 ，r 11 +r 12 ＝1，r 12 ＞r 8 。
It should be noted that the eleventh weight and the twelfth weight may be set in the data processing device 13 in advance by the operation and maintenance personnel in practical application.
For example, the eleventh weight may be set to 0.1, and the twelfth weight may be set to 0.9.
It can be understood that, under the third condition, the communication environment is greatly interfered, the doppler frequency offset value fluctuates up and down and changes violently, and the first frequency offset parameter is greater in the degree of uncertainty, so that the twelfth weight value of the third frequency offset parameter is greater and more prone to referring to the third frequency offset parameter, and the calculated target frequency offset parameter can be closer to the true frequency offset value.
The embodiment of the invention provides a data processing method and a data processing device, which are applied to determining a Doppler frequency offset value generated in high-speed operation. In consideration of the fact that the change magnitude and change rule of the frequency offset value are different along with the change of the communication environment of the receiver in the moving process of the two communication parties, the technical scheme of the application can combine different change rules of the frequency offset value in different communication environments, take the second frequency offset parameter before the first moment as the basis for correcting the first frequency offset parameter, fully consider the change rule of the frequency offset value in the communication environment and the correlation between the second frequency offset parameter and the real frequency offset value at the first moment before the first moment, and enable the determined target frequency offset parameter to be closer to the actual frequency offset value, thereby providing a basis for adjusting the receiving performance of the communication system in different communication environments.
The scheme provided by the embodiment of the invention is mainly introduced from the perspective of a method. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed in hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiment of the present invention, the data processing apparatus may be divided into the functional modules according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. Optionally, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
Fig. 8 is a schematic structural diagram of a data processing apparatus according to an embodiment of the present invention. As shown in fig. 8, the data processing means 13 is used for determining a doppler frequency offset value, for example for performing the data processing method shown in fig. 3. The data processing apparatus 13 includes an acquisition unit 131 and a determination unit 132.
The obtaining unit 131 is configured to obtain a first frequency offset parameter and a second frequency offset parameter. The first frequency offset parameter comprises a frequency offset value calculated according to a reference signal at a first moment. The second frequency offset parameter is used to demodulate the user data received at the second time. The first time is after the second time. For example, as shown in fig. 3, the obtaining unit 131 may be configured to execute S201.
The determining unit 132 is configured to determine a variation law of the frequency offset value in the first time period. The first time is the time when the first time period ends. For example, as shown in fig. 3, the determination unit 132 may be configured to execute S202.
The determining unit 132 is further configured to determine a target frequency offset parameter according to the first frequency offset parameter, the second frequency offset parameter, and the variation rule. The target frequency offset parameter is used for demodulating the user data received at the first time. For example, as shown in fig. 3, the determination unit 132 may be configured to execute S203.
Optionally, as shown in fig. 8, the determining unit 132 provided in the embodiment of the present invention is specifically configured to obtain a third frequency offset parameter and a fourth frequency offset parameter. The third frequency offset parameter comprises a frequency offset value calculated according to the reference signal at the second moment, and the fourth frequency offset parameter comprises a frequency offset value calculated according to the reference signal at the third moment. The second time is after the third time. For example, as shown in fig. 5, the determination unit 132 may be configured to perform S2021.
The determining unit 132 is further specifically configured to determine a change rule according to the first frequency offset parameter, the second frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter, and the first preset formula. Wherein, the change rule specifically includes: and whether the change amplitude of the frequency offset value exceeds a preset range in the first time period, and whether the change of the frequency offset value is monotonous under the condition that the change amplitude exceeds the preset range. The first time period is specifically a time from the third time to the first time. For example, as shown in fig. 5, the determination unit 132 may be configured to perform S2022.
Optionally, as shown in fig. 8, the determining unit 132 provided in the embodiment of the present invention is specifically configured to perform weighted summation on the first frequency offset parameter and the second frequency offset parameter according to a change rule, so as to obtain a target frequency offset parameter. For example, as shown in fig. 6, the determination unit 132 may be configured to execute S2031.
Wherein, if the change rule is: and in the first time period, if the change amplitude of the frequency offset value does not exceed the preset range, the first weight of the first frequency offset parameter is smaller than the second weight of the second frequency offset parameter. Wherein, the sum of the first weight and the second weight is 1.
If the change rule is as follows: and in the first time period, the change amplitude of the frequency offset value exceeds a preset range, and the change of the frequency offset value is monotonous, so that the third weight of the first frequency offset parameter is greater than the fourth weight of the second frequency offset parameter. Wherein the sum of the third weight and the fourth weight is 1.
If the change rule is as follows: in the first time period, the variation amplitude of the frequency offset value exceeds the preset range, and the variation of the frequency offset value is not monotonous, then the fifth weight of the first frequency offset parameter is smaller than the sixth weight of the second frequency offset parameter, the fifth weight is smaller than the first weight, and the sixth weight is larger than the second weight. And the sum of the fifth weight and the sixth weight is 1.
Optionally, as shown in fig. 9, the data processing apparatus according to the embodiment of the present invention further includes a determining unit 133.
A determining unit 133, configured to determine whether the second frequency offset parameter exists. For example, as shown in fig. 7, the determination unit 133 may be configured to execute S2012.
The determining unit 132 is specifically configured to determine a change rule according to the first frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter, and the second preset formula if the second frequency offset parameter does not exist. For example, as shown in fig. 7, the determination unit 132 may be configured to execute S204.
Optionally, as shown in fig. 8, the determining unit 132 provided in the embodiment of the present invention is further specifically configured to determine the target frequency offset parameter according to the first frequency offset parameter, the third frequency offset parameter, and the variation rule. For example, as shown in fig. 7, the determination unit 132 may be configured to execute S205.
In the case of implementing the functions of the integrated modules in the form of hardware, the embodiment of the present invention provides another possible structural schematic diagram of the data processing apparatus in the above embodiment. As shown in fig. 10, a data processing apparatus 30 for determining a doppler shift value, for example for performing the data processing method shown in fig. 3. The data processing device 30 includes a processor 301, a memory 302, and a bus 303. The processor 301 and the memory 302 may be connected by a bus 303.
The processor 301 is a control center of the communication apparatus, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 301 may be a general-purpose Central Processing Unit (CPU), or may be another general-purpose processor. Wherein a general purpose processor may be a microprocessor or any conventional processor or the like.
For one embodiment, processor 301 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 10.
The memory 302 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
As a possible implementation, the memory 302 may exist separately from the processor 301, and the memory 302 may be connected to the processor 301 through the bus 303 for storing instructions or program code. The processor 301 can implement the data processing method provided by the embodiment of the present invention when calling and executing the instructions or program codes stored in the memory 302.
In another possible implementation, the memory 302 may also be integrated with the processor 301.
The bus 303 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 10, but this is not intended to represent only one bus or type of bus.
It is to be noted that the configuration shown in fig. 10 does not constitute a limitation of the data processing device 30. In addition to the components shown in fig. 10, the data processing device 30 may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
As an example, in connection with fig. 8, the functions implemented by the acquisition unit 131 and the determination unit 132 in the data processing apparatus are the same as those of the processor 301 in fig. 10.
Optionally, as shown in fig. 10, the data processing apparatus 30 provided in the embodiment of the present invention may further include a communication interface 304;
a communication interface 304 for connecting with other devices through a communication network. The communication network may be an ethernet network, a radio access network, a Wireless Local Area Network (WLAN), etc. The communication interface 304 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.
In one design, in the data processing apparatus provided in the embodiment of the present invention, the communication interface may be further integrated in the processor.
Fig. 11 shows another hardware configuration of the data processing apparatus in the embodiment of the present invention. As shown in fig. 11, the data processing apparatus 40 may include a processor 401 and a communication interface 402. The processor 401 is coupled to a communication interface 402.
The functions of the processor 401 may refer to the description of the processor 301 above. The processor 401 also has a memory function, and the function of the memory 302 can be referred to above.
The communication interface 402 is used to provide data to the processor 401. The communication interface 402 may be an internal interface of the communication device or an external interface (corresponding to the communication interface 304) of the communication device.
It should be noted that the configuration shown in fig. 11 does not constitute a limitation of the data processing apparatus 40, and the data processing apparatus 40 may include more or less components than those shown in fig. 11, or combine some components, or a different arrangement of components, in addition to the components shown in fig. 11.
Through the above description of the embodiments, it is clear for a person skilled in the art that, for convenience and simplicity of description, only the division of the above functional units is illustrated. In practical applications, the above function allocation can be performed by different functional units according to needs, that is, the internal structure of the device is divided into different functional units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The embodiment of the present invention further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer executes the instructions, the computer executes each step in the method flow shown in the foregoing method embodiment.
Embodiments of the present invention provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the data processing method of the above-described method embodiments.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, and a hard disk. Random Access Memory (RAM), Read-Only Memory (ROM), Erasable Programmable Read-Only Memory (EPROM), registers, a hard disk, an optical fiber, a portable Compact disk Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any other form of computer-readable storage medium, in any suitable combination, or as appropriate in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the invention, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
Since the data processing apparatus, the computer-readable storage medium, and the computer program product in the embodiments of the present invention may be applied to the method described above, for technical effects that can be obtained by the method, reference may also be made to the method embodiments described above, and details of the embodiments of the present invention are not repeated herein.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention.

Claims (12)

1. A method of data processing, the method comprising:
acquiring a first frequency offset parameter and a second frequency offset parameter; the first frequency offset parameter comprises a frequency offset value calculated according to a reference signal at a first moment; the second frequency offset parameter is used for demodulating the user data received at a second moment; the first time is after the second time;
determining a change rule of the frequency offset value in a first time period; wherein the first time is the time when the first time period ends; the change rule specifically comprises: whether the change amplitude of the frequency offset value exceeds a preset range in the first time period, and whether the change of the frequency offset value is monotonous under the condition that the change amplitude exceeds the preset range;
determining a target frequency offset parameter according to the first frequency offset parameter, the second frequency offset parameter and the change rule; wherein the target frequency offset parameter is used for demodulating the user data received at the first time.
2. The data processing method of claim 1, wherein determining a variation law of the frequency offset value in the first time period comprises:
acquiring a third frequency offset parameter and a fourth frequency offset parameter; the third frequency offset parameter comprises a frequency offset value calculated according to the reference signal at the second moment, and the fourth frequency offset parameter comprises a frequency offset value calculated according to the reference signal at the third moment; the second time is after the third time;
determining the change rule according to the first frequency offset parameter, the second frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter and a first preset formula; the first time period is specifically a time from the third time to the first time.
3. The data processing method according to claim 2, wherein the determining a target frequency offset parameter according to the first frequency offset parameter, the second frequency offset parameter, and the change rule specifically includes:
according to the change rule, carrying out weighted summation on the first frequency offset parameter and the second frequency offset parameter to obtain the target frequency offset parameter;
wherein, if the change rule is: in the first time period, if the change amplitude of the frequency offset value does not exceed the preset range, the first weight of the first frequency offset parameter is smaller than the second weight of the second frequency offset parameter; wherein the sum of the first weight and the second weight is 1;
if the change rule is as follows: in the first time period, if the change amplitude of the frequency offset value exceeds the preset range and the change of the frequency offset value is monotonous, the third weight of the first frequency offset parameter is greater than the fourth weight of the second frequency offset parameter; wherein the sum of the third weight and the fourth weight is 1;
if the change rule is as follows: in the first time period, if the variation amplitude of the frequency offset value exceeds the preset range and the variation of the frequency offset value is not monotonous, the fifth weight of the first frequency offset parameter is smaller than the sixth weight of the second frequency offset parameter, the fifth weight is smaller than the first weight, and the sixth weight is larger than the second weight; wherein a sum of the fifth weight and the sixth weight is 1.
4. A data processing method according to any of claims 2-3, wherein the second frequency offset parameter is a frequency offset value corrected for the third frequency offset parameter, the method further comprising:
judging whether the second frequency offset parameter exists or not;
and if the second frequency offset parameter does not exist, determining the change rule according to the first frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter and a second preset formula.
5. The data processing method of claim 4, wherein after determining the change rule according to the first frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter and a second predetermined formula, the method further comprises:
and determining a target frequency offset parameter according to the first frequency offset parameter, the third frequency offset parameter and the change rule.
6. A data processing apparatus is characterized by comprising an acquisition unit and a determination unit;
the acquiring unit is used for acquiring a first frequency offset parameter and a second frequency offset parameter; the first frequency offset parameter comprises a frequency offset value calculated according to a reference signal at a first moment; the second frequency offset parameter is used for demodulating the user data received at a second moment; the first time is after the second time;
the determining unit is used for determining a change rule of the frequency offset value in a first time period; wherein the first time is the time when the first time period ends; the change rule specifically includes: whether the change amplitude of the frequency offset value exceeds a preset range in the first time period and whether the change of the frequency offset value is monotonous under the condition that the change amplitude exceeds the preset range;
the determining unit is further configured to determine a target frequency offset parameter according to the first frequency offset parameter, the second frequency offset parameter, and the change rule; wherein the target frequency offset parameter is used to demodulate the user data received at the first time.
7. The data processing apparatus according to claim 6, wherein the determining unit is specifically configured to obtain a third frequency offset parameter and a fourth frequency offset parameter; the third frequency offset parameter comprises a frequency offset value calculated according to the reference signal at the second moment, and the fourth frequency offset parameter comprises a frequency offset value calculated according to the reference signal at the third moment; the second time is after the third time;
the determining unit is further specifically configured to determine the change rule according to the first frequency offset parameter, the second frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter, and a first preset formula; the first time period is specifically a time from the third time to the first time.
8. The data processing apparatus according to claim 7, wherein the determining unit is specifically configured to perform a weighted summation on the first frequency offset parameter and the second frequency offset parameter according to the variation rule to obtain the target frequency offset parameter;
wherein, if the change rule is: in the first time period, if the change amplitude of the frequency offset value does not exceed the preset range, the first weight of the first frequency offset parameter is smaller than the second weight of the second frequency offset parameter; wherein the sum of the first weight and the second weight is 1;
if the change rule is as follows: in the first time period, if the change amplitude of the frequency offset value exceeds the preset range and the change of the frequency offset value is monotonous, the third weight of the first frequency offset parameter is greater than the fourth weight of the second frequency offset parameter; wherein the sum of the third weight and the fourth weight is 1;
if the change rule is as follows: in the first time period, if the variation amplitude of the frequency offset value exceeds the preset range and the variation of the frequency offset value is not monotonous, the fifth weight of the first frequency offset parameter is smaller than the sixth weight of the second frequency offset parameter, the fifth weight is smaller than the first weight, and the sixth weight is larger than the second weight; wherein a sum of the fifth weight and the sixth weight is 1.
9. The data processing apparatus according to any one of claims 7 to 8, characterized in that the data processing apparatus further comprises a judging unit;
the judging unit is configured to judge whether the second frequency offset parameter exists;
the determining unit is specifically configured to determine the change rule according to the first frequency offset parameter, the third frequency offset parameter, the fourth frequency offset parameter, and a second preset formula if the second frequency offset parameter does not exist.
10. The data processing apparatus of claim 9, wherein the determining unit is further configured to determine a target frequency offset parameter according to the first frequency offset parameter, the third frequency offset parameter, and the variation rule.
11. A computer-readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computer, cause the computer to perform the data processing method of any of claims 1-5.
12. A data processing apparatus, comprising: a processor and a memory; wherein the memory is configured to store one or more programs, the one or more programs including computer executable instructions that, when executed by the data processing apparatus, are executed by the processor to cause the data processing apparatus to perform the data processing method of any of claims 1 to 5.
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CN101184077A (en) * 2007-12-20 2008-05-21 北京创毅视讯科技有限公司 Doppler frequency deviation obtaining method and apparatus
CN106559375A (en) * 2016-12-05 2017-04-05 北京邮电大学 Doppler frequency offset estimation method and device and removing method and device in ofdm system

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CN101184077A (en) * 2007-12-20 2008-05-21 北京创毅视讯科技有限公司 Doppler frequency deviation obtaining method and apparatus
CN106559375A (en) * 2016-12-05 2017-04-05 北京邮电大学 Doppler frequency offset estimation method and device and removing method and device in ofdm system

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