WO2021189360A1

WO2021189360A1 - Channel tracking method and related device therefor

Info

Publication number: WO2021189360A1
Application number: PCT/CN2020/081434
Authority: WO
Inventors: 王金山; 柳剑飞; 赵砚博; 孙艳宾; 方李明
Original assignee: 华为技术有限公司
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2021-09-30
Also published as: CN115299013B; CN115299013A

Abstract

Provided are a channel tracking method and a related device therefor, which are used in the technical field of communications. The method comprises: a receiver receiving at least two tracking signals sent by a transmitter, wherein the tracking signals are used for the adjusting of DFE coefficients of a decision feedback equalizer by the receiver; the receiver obtaining a first DFE coefficient and a second DFE coefficient according to the at least two tracking signals; the receiver instructing, according to the first DFE coefficient and the second DFE coefficient, the transmitter to adjust the sending frequency of the tracking signals; and the receiver changing the sending frequency of the tracking signals according to the change amount of the DFE coefficients at adjacent moments. When a channel is unstable, the sending frequency of a tracking signal can be increased, thereby influencing the updating speed of a DFE coefficient, such that a receiver can restore a received signal more accurately, and it can be ensured that a system is stable and is not unlinked.

Description

Channel tracking method and related equipment

Technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a channel tracking method and related equipment.

Background technique

In high-speed wired data communication systems, the insertion loss and return loss on the line change with frequency. Generally, the low-frequency loss is small and the high-frequency loss is large. This will inevitably cause signal distortion during data transmission, making the receiving device unable to accept it normally. Signal; and channel equalization technology can eliminate interference and noise, compensate for signal attenuation and phase distortion, thereby reducing the bit error rate; the basic principle of channel equalization technology is to equalize the channel characteristics, that is, the equalizer at the receiving end produces characteristics that are opposite to the channel characteristics. To reduce or eliminate signal interference caused by the time-varying transmission characteristics of the channel, decision feedback equalization (DFE) is a very effective and widely used equalizer that can effectively compensate for channel attenuation and phase distortion.

Generally, the transmitter sends a signal, and the signal is transmitted to the receiver through the channel. The receiver adjusts the DFE coefficient of the compensation function corresponding to the decision feedback equalizer to compensate the received signal and restore the signal; specifically, the transmitter follows a fixed frequency The tracking signal Tracking Symbols is sent to the receiver to test the channel condition, and then the receiver adjusts the DFE coefficient according to the Tracking Symbols, and uses the coefficient to compensate the received signal to complete the data transmission.

Temperature is an important factor affecting line insertion loss and return loss. In a certain scenario, such as in-vehicle communication, when the line temperature changes sharply, severe channel turbulence will occur. Because the system cannot update the DFE coefficient in time, It will make the receiver unable to process the received signal normally, and cannot guarantee the stability and reliability of the system.

Summary of the invention

The embodiments of the present application provide a channel tracking method and related equipment, which are used to update the DFE coefficient of the receiver in time, effectively compensate for channel attenuation and phase distortion, and ensure the stability and reliability of the system.

The first aspect of the embodiments of the present application provides a channel tracking method, including:

The receiver receives the tracking signal sent by the transmitter, updates the DFE coefficient of the receiver's decision feedback equalizer within a certain period of time according to the tracking signal, and then compensates the data signal received during the period of time according to the DFE coefficient. When the channel is turbulent, it is necessary to change the DFE coefficients in time to restore the data signal more accurately; when the receiver obtains the first DFE coefficient and the second DFE coefficient according to the received tracking signal, it is based on the first DFE coefficient and the data signal. The change of the second DFE coefficient instructs the transmitter to adjust the sending frequency of the tracking signal, so that the transmitter can continuously adjust the DFE coefficient according to the tracking signal in time.

When channel turbulence occurs, the receiver perceives the change of the channel according to the amount of change in the DFE coefficient, and instructs the transmitter to change the sending frequency of the tracking signal, so that the receiver can obtain the tracking signal in time and adjust the DFE coefficient according to the tracking signal, so that it can be changed The adjustment period of the DFE coefficient makes it more accurate to compensate the data signal to ensure the stability and reliability of the system.

With reference to the first aspect of the embodiments of the present application, in the first implementation manner of the first aspect of the embodiments of the present application:

The receiver perceives the channel change and instructs the transmitter to adjust the transmission frequency of the tracking signal according to the coefficient changes of the first DFE coefficient and the second DFE coefficient; for example, the first DFE coefficient corresponding to the previous moment and the second DFE coefficient corresponding to the next moment When the variation of the DFE coefficient is large, it indicates that the channel has undergone a large change, and then the receiver needs to instruct the transmitter to speed up the sending frequency of the tracking signal and track the channel condition in time.

The receiver adjusts the sending frequency of the tracking signal according to the change of the DFE coefficient, avoiding the problem that the receiver does not perceive the channel change in time due to the transmitter sending the tracking signal at a fixed frequency, and can effectively compensate for the channel attenuation and ensure the reliability of the system.

With reference to the first implementation manner of the first aspect of the embodiments of the present application, in the second implementation manner of the first aspect of the embodiments of the present application:

When the receiver instructs the transmitter to adjust the sending frequency of the tracking signal, the receiver can determine the sending frequency; the receiver determines the sending frequency as the first frequency according to the coefficient variation of the first DFE coefficient and the second DFE coefficient, and The transmitting frequency is sent to the transmitter, and then the transmitter transmits the tracking signal according to the first frequency.

The receiver can directly determine the sending frequency of the tracking signal according to its own receiving ability, so that the transmitter only needs to transmit the tracking signal according to this frequency, without the transmitter adjusting the sending frequency, so that the receiver can adjust the DFE coefficient more timely and effectively.

In combination with the second implementation manner of the first aspect of the embodiments of the present application, in the third implementation manner of the first aspect of the embodiments of the present application:

When the receiver determines the transmission frequency of the tracking signal according to the coefficient change of the DFE coefficient, the threshold range of the coefficient change can be preset. Different threshold ranges correspond to different frequency levels. The receiver first determines the coefficient change of the DFE coefficient. Threshold range, the frequency level is determined according to the threshold range, and then the sending frequency of the tracking signal is determined according to the frequency level.

The threshold range of the coefficient change can be divided into a simpler way to determine the sending frequency of the tracking signal, so that the tracking signal can more effectively perceive channel changes and improve the stability and reliability of the system.

In combination with the third implementation manner of the first aspect of the embodiments of the present application, in the fourth implementation manner of the first aspect of the embodiments of the present application:

Since the DFE coefficient is determined according to the attenuation degree of the tracking signal in the channel, when the coefficients of the first DFE coefficient and the second DFE coefficient corresponding to different moments vary greatly, it means that the attenuation degree of the tracking signal has occurred greatly. Change, that is, the channel has a great turbulence, then it is necessary to speed up the sending frequency of the tracking signal, monitor the tracking channel situation in time, and adjust the DFE coefficient in time to compensate the data signal more accurately, that is, the greater the value of the coefficient change , The higher the frequency level of the tracking signal, the higher the transmission frequency.

Adjusting the sending frequency of the tracking signal according to the coefficient change can monitor the tracking channel situation in time, so that the receiver can adjust the DFE coefficient in time and compensate the data signal more accurately.

With reference to the second implementation to the fourth implementation of the first aspect of the embodiments of the present application, in the fifth implementation of the first aspect of the embodiments of the present application:

After the receiver determines the sending frequency of the tracking signal, it can send a feedback message to the transmitter, and indicate the sending frequency according to the message field in the feedback message.

With reference to the first implementation manner of the first aspect of the embodiments of the present application, in the sixth implementation manner of the first aspect of the embodiments of the present application:

The receiver can also perceive channel changes according to the coefficient changes of the first DFE coefficient and the second DFE coefficient, and send indication information to the transmitter, and then the transmitter determines the sending frequency of the tracking signal according to the indication information.

The receiver sends instruction information to the transmitter, and the transmitter determines the sending frequency of the tracking signal, so that the transmitter can control the sending of the tracking signal according to its own sending ability.

With reference to the first aspect of the embodiments of the present application to the sixth implementation manner of the first aspect, in the seventh implementation manner of the first aspect of the embodiments of the present application:

Before the receiver instructs the transmitter to adjust the sending signal, the transmitter periodically sends a tracking signal to the receiver according to a fixed frequency. When the receiver receives the first tracking signal, it changes the DFE once according to the signal loss of the first tracking signal. Coefficient, when the receiver receives the second tracking signal again, it adjusts the DFE coefficient again according to the signal loss of the second tracking signal.

In different periods, the channel condition will fluctuate, so it is necessary to track the signal to monitor the channel condition, and perceive the channel condition by tracking the loss of the signal, so as to determine the DFE coefficient of the period, and according to the DFE coefficient for the period The received data signal is processed, so that the receiver can perform a more accurate restoration of the data signal, which is convenient for improving the reliability of the system.

With reference to the seventh implementation manner of the first aspect of the embodiments of the present application, in the eighth implementation manner of the first aspect of the embodiments of the present application:

The receiver can compare the periodically sent tracking signals of two adjacent moments, that is, compare the DFE coefficient corresponding to the tracking signal at the previous moment and the DFE coefficient corresponding to the tracking signal at the next moment, so that the channel changes can be more accurately sensed. Makes the adjustment of DFE coefficient more timely, and the stability and reliability of the system are higher.

The second aspect of the embodiments of the present application provides a channel tracking method, including:

The transmitter periodically sends multiple tracking signals to the receiver for the receiver to perceive channel changes according to the tracking signal and adjust the DFE coefficient of the decision feedback equalizer. When the receiver determines the sending frequency of the tracking signal according to the DFE coefficient, it is like The transmitter transmits the transmission frequency, that is, the transmitter receives the first message sent by the receiver, and the first message includes the transmission frequency, and then the transmitter transmits the tracking signal according to the new transmission frequency.

When channel turbulence occurs, the receiver perceives the change of the channel according to the amount of change between the DFE coefficients of the two periods, and instructs the transmitter to change the sending frequency of the tracking signal, so that the transmitter can send the tracking signal in time and monitor the channel change. The receiver can compensate the data signal more accurately to ensure the stability and reliability of the system.

The third aspect of the embodiments of the present application provides a channel tracking method, including:

The transmitter periodically sends multiple tracking signals to the receiver for the receiver to perceive channel changes according to the tracking signal, adjust the decision feedback equalizer DFE coefficients, and then the receiver perceives the channel changes according to the DFE coefficients in different periods, and transmits The transmitter sends instruction information to inform the transmitter to adjust the transmission frequency of the tracking signal. The transmitter determines the transmission frequency of the tracking signal according to the instruction information, and periodically transmits the tracking signal according to the transmission frequency.

The receiver perceives the change of the channel according to the amount of change between the DFE coefficients in different periods, and prompts the transmitter to adjust the sending frequency of the tracking signal, so that the transmitter can send the tracking signal in time and monitor the channel change, so that the receiver can be more accurate Compensate the data signal to ensure the stability and reliability of the system.

A fourth aspect of the embodiments of the present application provides a receiving device, including:

A receiving unit, configured to receive at least two tracking signals sent by a transmitter, where the tracking signals are used by the receiving device to adjust the DFE coefficient of the decision feedback equalizer;

An obtaining unit, configured to obtain a first DFE coefficient and a second DFE coefficient according to the at least two tracking signals;

The indicating unit is configured to instruct the transmitter to adjust the sending frequency of the tracking signal according to the first DFE coefficient and the second DFE coefficient.

With reference to the fourth aspect of the embodiments of the present application, in the first implementation manner of the third aspect of the embodiments of the present application:

The indicating unit is specifically configured to instruct the transmitter to adjust the sending frequency of the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient.

With reference to the first implementation manner of the fourth aspect of the embodiments of the present application, in the second implementation manner of the fourth aspect of the embodiments of the present application:

The indication unit includes a determining module and a sending module;

The determining module is configured to determine that the sending frequency of the tracking signal is the first frequency according to the coefficient variation of the first DFE coefficient and the second DFE coefficient;

The sending module is configured to send the first frequency to the transmitter, so that the transmitter periodically sends the tracking signal according to the first frequency.

In combination with the second implementation manner of the fourth aspect of the embodiments of the present application, in the third implementation manner of the fourth aspect of the embodiments of the present application:

The determining module is specifically configured to determine the frequency level corresponding to the coefficient change amount according to the threshold value range in which the coefficient change amount is located, wherein the threshold value range and the frequency level have a mapping relationship; determine according to the frequency level The first frequency.

In combination with the third implementation manner of the fourth aspect of the embodiments of the present application, in the fourth implementation manner of the fourth aspect of the embodiments of the present application:

When the value of the coefficient variation is larger, the frequency level is higher, and the first frequency is higher.

With reference to the second implementation to the fourth implementation of the fourth aspect of the embodiments of the present application, in the fifth implementation of the fourth aspect of the embodiments of the present application:

The sending module is specifically configured to send a feedback message to the transmitter, and the feedback message includes a message field;

The indicating unit is configured to indicate the first frequency according to the message field.

In combination with the first implementation manner of the fourth aspect of the embodiments of the present application, in the sixth implementation manner of the fourth aspect of the embodiments of the present application:

The indication unit is configured to determine the indication information corresponding to the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient;

The instruction unit is further configured to send the instruction information to the transmitter, so that the transmitter determines the sending frequency of the tracking signal according to the instruction information.

With reference to the fourth aspect to the sixth implementation manner of the fourth aspect of the embodiments of the present application, in the seventh implementation manner of the fourth aspect of the embodiments of the present application:

The at least two tracking signals are a first tracking signal and a second tracking signal periodically sent by the transmitter;

The obtaining unit is configured to obtain the first DFE coefficient according to the first tracking signal, and obtain the second DFE coefficient according to the second tracking signal.

In combination with the seventh implementation manner of the fourth aspect of the embodiments of the present application, in the eighth implementation manner of the fourth aspect of the embodiments of the present application:

The first tracking signal and the second tracking signal are tracking signals at adjacent moments.

A fifth aspect of the embodiments of the present application provides a transmitting device, including:

A sending unit, configured to send at least two tracking signals to the receiver, where the tracking signals are used by the receiver to adjust the DFE coefficients of the decision feedback equalizer;

A receiving unit, configured to receive a first message sent by the receiver, where the first message includes a transmission frequency, and the transmission frequency is determined by the receiver according to the first DFE coefficient and the second DFE coefficient;

The sending unit is further configured to send the tracking signal according to the sending frequency.

A sixth aspect of the embodiments of the present application provides a transmitting device, including:

A receiving unit, configured to receive indication information sent by the receiver, where the indication information is determined by the receiver according to the first DFE coefficient and the second DFE coefficient;

A determining unit, configured to determine the sending frequency of the tracking signal according to the indication information;

The sending unit is further configured to periodically send the tracking signal according to the sending frequency.

A seventh aspect of the present application provides a receiving device, including: at least one processor and a memory, the memory stores computer-executable instructions that can run on the processor, and when the computer-executable instructions are executed by the processor, the The receiving device executes the method described in the foregoing first aspect or any one of the possible implementation manners of the first aspect.

The eighth aspect of the present application provides a transmitting device, including: at least one processor and a memory, the memory stores computer-executable instructions that can run on the processor, and when the computer-executable instructions are executed by the processor, the The application function network element executes the method described in the second aspect above.

A ninth aspect of the present application provides a transmitting device, including: at least one processor and a memory, the memory stores computer-executable instructions that can run on the processor, and when the computer-executable instructions are executed by the processor, the The application function network element executes the method described in the third aspect.

A tenth aspect of the present application provides a channel tracking system, including: a receiving device and a sending device, where the receiving device is the receiving device according to any one of the possible implementations of the fourth aspect to the fourth aspect; the sending device The device is the application function network element described in the fifth aspect or the sixth aspect.

The eleventh aspect of the embodiments of the present application provides a computer storage medium, which is used to store computer software instructions used by the above-mentioned receiving device or sending device. program of.

The receiving device may be the receiving device described in the foregoing fourth aspect.

The sending device may be the sending device described in the foregoing fifth aspect or sixth aspect.

The twelfth aspect of the present application provides a chip or chip system. The chip or chip system includes at least one processor and a communication interface. The communication interface and the at least one processor are interconnected by wires, and the at least one processor is used to run computer programs or instructions. , To perform the channel tracking method described in any one of the first aspect to any one of the possible implementation manners of the first aspect;

Among them, the communication interface in the chip can be an input/output interface, a pin, or a circuit.

In a possible implementation, the chip or chip system described above in this application further includes at least one memory, and instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, for example, a register, a cache, etc., or a storage unit of the chip (for example, a read-only memory, a random access memory, etc.).

The thirteenth aspect of the present application provides a chip or chip system. The chip or chip system includes at least one processor and a communication interface. The communication interface and the at least one processor are interconnected by wires, and the at least one processor is used to run computer programs or instructions. , To perform the channel tracking method described in the second aspect;

The fourteenth aspect of the present application provides a chip or chip system. The chip or chip system includes at least one processor and a communication interface. The communication interface and at least one processor are interconnected by wires, and the at least one processor is used to run computer programs or instructions. , To perform the channel tracking method described in the third aspect;

The fifteenth aspect of the embodiments of the present application provides a computer program product. The computer program product includes computer software instructions that can be loaded by a processor to implement any one of the channel tracking methods in the first aspect. The process, the process in the channel tracking method of any one of the second aspect and the third aspect.

In the technical solution provided by the embodiments of this application, when the channel is stable, the transmitter sends a tracking signal to the receiver at a fixed frequency, and the receiver updates the DFE coefficients every time a tracking signal is received. The DFE coefficients are used to When the channel changes greatly, the change of the DFE coefficients at two moments will also increase. Therefore, the channel condition can be judged by comparing the changes of the DFE coefficients at adjacent moments. The embodiment of the application changes the sending frequency of the tracking signal according to the change of the DFE coefficient at the adjacent time. When the channel is unstable, the sending frequency of the tracking signal can be accelerated, which in turn affects the update speed of the DFE coefficient, which can make the receiver more accurate Restore the received signal to ensure the system is stable and uninterrupted.

Description of the drawings

FIG. 1 is a schematic diagram of a channel tracking method in an embodiment of this application;

2 is a schematic flowchart of a channel tracking method in an embodiment of the application;

FIG. 3 is a schematic flowchart of another channel tracking method in an embodiment of this application;

FIG. 4 is a schematic structural diagram of a receiving device in an embodiment of the application;

FIG. 5 is a schematic structural diagram of a transmitting device in an embodiment of the application;

FIG. 6 is a schematic structural diagram of a transmitting device in an embodiment of the application;

FIG. 7 is a schematic structural diagram of another receiving device in an embodiment of this application;

FIG. 8 is a schematic structural diagram of another transmitting device in an embodiment of this application;

FIG. 9 is a schematic structural diagram of another transmitting device in an embodiment of this application.

Detailed ways

In the process of mobile communication, the process of data transmission is that the transmitter sends a data signal, and the data signal is transmitted to the receiver through the channel. Due to the existence of channel loss in the channel, such as line insertion loss and return loss, it will cause signal attenuation or phase distortion of the data signal, resulting in data transmission failure.

Insertion loss refers to the signal loss caused by the insertion of cables or components between the transmitter and the receiver, usually refers to signal attenuation; temperature is one of the main reasons that affect the line insertion loss, and the insertion loss varies greatly at different temperatures. As shown in the following table, Table 1 shows the insertion loss of the cable at two frequency points of 2.5GHz and 5GHz at different temperatures, and the variation of the insertion loss at each temperature based on normal temperature of 20 degrees:

Table 1

It can be seen from the above table that as the temperature rises, the absolute value of the line insertion loss is also higher. Compared with the cable insertion loss at a normal temperature of 20 degrees, the variation of the cable insertion loss can reach 84% to 120%, which will cause the channel to fluctuate. Because the insertion loss of the line at different temperatures is different, the signal attenuation at each temperature will also vary greatly. The receiver needs to compensate the received data signal according to different channel conditions, so as to effectively restore the data signal and ensure the channel The stability and reliability.

The receiver cannot directly perceive the channel change. Generally, before sending the data signal, the transmitter will first send the tracking signal Tracking Symbols to the receiver. The receiver analyzes the received tracking signal to determine the compensation coefficient, and then according to The compensation coefficient compensates the received data signal to complete the data transmission.

The decision feedback equalizer is composed of two transversal filters and a decider. The two transversal filters are a feedforward filter and a feedback filter. Since the feedback loop of the equalizer contains the decider, the equalizer can output Non-linear signal; the receiver inputs the received data signal into the decision feedback equalizer, compensates it, restores the data signal, completes the data transmission, and restores different signals by adjusting the DFE coefficient of the decision feedback equalizer.

The working process of the decision feedback equalizer includes two stages, one is the training process, and the other is the tracking process. In the training process, the transmitter transmits a set of training sequences with a known fixed length to the receiver, and the receiver sets the parameters of the filter according to the training sequence to minimize the detection error rate. A typical training sequence is a pseudo-random binary signal or a fixed waveform signal sequence, followed by a sequence of user message symbols. The decision feedback equalizer uses a recursive algorithm to estimate the channel characteristics, adjust the filter parameters, and compensate for the distortion of the channel characteristics; after the training, the equalizer parameters are basically close to the optimal value to ensure the reception of user data; then in the actual received user message data, Then, a fixed tracking signal is first used to perceive the channel characteristics, and the equalizer parameters, that is, the equalization parameter DFE coefficient of the equalization algorithm corresponding to the equalizer, are continuously changed as the channel characteristics change, to compensate for the received user message data.

When the receiver receives the tracking signal, it first perceives the channel transfer characteristics according to the tracking signal, and determines the DFE coefficient by restoring the tracking signal, and then compensates the received data signal according to the DFE coefficient; generally, the transmitter uses The tracking signal is sent at a fixed time interval, and the DFE coefficients are updated at a fixed time interval.

Figure 1 is a schematic diagram of the channel tracking method in the embodiment of the application. As shown in Figure 1, the transmitter periodically sends the tracking signal Tracking Symbol to the receiver at a fixed frequency, and the receiver updates the DFE coefficients every time the Tracking Symbol is received. , And then compensate the data signal Data Symbol received in the period according to the DFE coefficient to complete the data transmission.

In some scenarios, such as in-vehicle communication, rapid temperature changes will cause channel turbulence. If the Tracking Symbol is sent at a fixed time interval, it will cause the Tracking Symbol to fail to detect channel changes in time, and the DFE coefficients are not updated in time, so it cannot Compensate the data signal more accurately, reducing the reliability of the system.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a channel tracking method in an embodiment of the application, which is used to improve system reliability. As shown in FIG. 2, an embodiment of a channel tracking method provided by the present application includes:

201. The transmitter sends a first tracking signal to the receiver.

The transmitter periodically sends the tracking signal to monitor the channel condition. Optionally, the transmitter transmits the tracking signal once in a cycle, and the tracking signal is transmitted to the receiver through the channel, and the receiver is based on the signal loss of the received tracking signal According to the situation, to indirectly sense the channel condition, and update the DFE coefficient according to the loss of the tracking signal.

202. The receiver determines the first DFE coefficient according to the first tracking signal.

Exemplarily, the transmitter sends the first tracking signal in the first period, and the receiver updates the DFE coefficient in the period to the first DFE coefficient according to the first tracking signal, and then according to the first DFE coefficient in the period Data Xinha compensates and completes data transmission.

Optionally, the transmitter may also periodically send multiple tracking signals, and the receiver may adjust the tracking signals after receiving the multiple tracking signals, which is not specifically limited.

203. The transmitter sends a second tracking signal to the receiver.

It is understandable that the transmitter first sends the tracking signal at a fixed time interval, that is, within a time period, the transmitter first sends the tracking signal to perceive the channel change, so that the receiver adjusts the DFE coefficient, and then sends the data signal. According to the DFE coefficients, the channel loss is compensated, the signal is restored, and the transmission of the data signal is completed. Since the channel characteristics are continuously changing, in order to track the channel changes in time, the preferred solution is that each time the transmitter transmits a tracking signal, the receiver adjusts the DFE coefficient once according to the tracking signal, that is, the first tracking signal and the second tracking signal are continuous Two tracking signals corresponding to two time periods; that is, after the receiver receives the first tracking signal corresponding to the first period, it adjusts the DFE coefficient to the first DFE coefficient, and then receives the second signal transmitted by the transmitter in the second period. The DFE coefficient is adjusted again after the tracking signal, and the first period and the second period are two adjacent time periods in the time domain.

It is understandable that frequent adjustment of DFE coefficients will also increase the load of the decision feedback equalizer. An alternative solution is to extend the adjustment time of DFE coefficients; after the receiver receives the first tracking signal corresponding to the first cycle, it will The DFE coefficient is adjusted to the first DFE coefficient, and then after multiple time periods, the DFE coefficient is adjusted again in the second period, that is, the first period and the second period are not adjacent in the time domain; in order to reduce the load of the feedback equalizer , While ensuring the reliability of the compensation data signal, the first cycle and the second cycle can be directly separated by one to two cycles.

It is understandable that step 202 and step 203 are steps performed by the two execution subjects, and there is no chronological order. The transmitter can send the second tracking signal after the receiver determines the first DFE coefficient, or it can be determined by the receiver. The second tracking signal is sent before the first DFE coefficient, and the specific form is not limited.

204. The receiver determines the second DFE coefficient according to the second tracking signal.

It can be understood that the tracking signal is to sense channel changes and update the DFE coefficients in time to restore the data signal more accurately. Therefore, in a preferred solution, the receiver updates the DFE coefficients in time every time a tracking signal is received, that is, The first tracking signal and the second tracking signal are adjacent to the tracking signal. The first DFE coefficient and the second DFE coefficient are the DFE coefficients of the receiver in the adjacent period. The data signal inside is restored.

205. The receiver determines that the sending frequency of the tracking signal is the first frequency according to the first DFE coefficient and the second DFE coefficient.

It is understandable that the DFE coefficients are determined according to the tracking signals at different moments. Therefore, channel turbulence can be sensed according to the changes in the DFE coefficients in different periods. When the DFE coefficient changes greatly, it means that channel turbulence has occurred. Therefore, it is necessary to adjust the DFE coefficient in time to deal with channel turbulence and to more effectively compensate the data signal. That is, it is necessary to speed up the transmission frequency of the tracking signal, and to track the channel condition in a timely and effective manner and feed it back to the receiver.

Exemplarily, the receiver may pre-determine the threshold value range of the variation. Each threshold value range corresponds to a frequency level, and each frequency level corresponds to a transmission frequency. It is understandable that when the coefficient variation of the DFE coefficient is greater, then It means that the more violent the channel turbulence, optionally, the frequency level can be set to high, and the corresponding transmission frequency is also higher.

Exemplarily, after each channel tracking is completed, the coefficient change of the DFE coefficient at the previous moment and the current moment can be calculated according to the following formula:

Among them, dfe _change is the coefficient change of the DFE coefficient, dfe _current(i) is the DFE coefficient at the current moment, dfe _last(i) is the DFE coefficient at the previous moment, and N represents the previous N adjacent cycle groups, which can be understood When only comparing the coefficient changes between the current time and the previous time, the value of N is 1. You can also analyze multiple previous DFE coefficients to sense channel turbulence; for example, you can get the first period, the first period The coefficient change amount of the DFE coefficient of the second cycle and the third cycle, and the value of N is 2 at this time.

After the coefficient change is determined, the threshold range corresponding to the value of the change is determined, and then the frequency level is determined according to the threshold range, and then the sending frequency of the tracking signal at the next moment is determined, and the sending cycle of the tracking signal is adjusted.

206. The receiver sends the first frequency to the transmitter.

After the receiver determines the sending frequency of the tracking signal at the next moment, it needs to send the first frequency to the receiver. For example, the receiver may send a feedback message to the transmitter, and the feedback message includes the first frequency; The message field of the feedback message can be used to indicate the first frequency. After receiving the feedback message, the transmitter queries the field corresponding to the feedback message to obtain the first frequency. The specific form is not limited.

Exemplarily, after receiving the tracking signal, the receiver sends an operation and maintenance management frame (OAM) to the transmitter. Among them, there are a total of 18 reserved (reserved) fields in an OAM frame, which can be used Any two reserved fields indicate four different tracking symbol sending frequency levels.

Exemplarily, the field <b1:b0> can be used to indicate the transmission frequency level of the tracking signal. As shown in Table 2, the mapping relationship between the coefficient variation of the DFE coefficient and the field <b1:b0> is:

取值范围Ranges	OAM帧字段<b1:b0>OAM frame field <b1:b0>
0＜dfe _change≤threshold1 0＜dfe _change ≤threshold1	0000
threshold1＜dfe _change≤threshold2 threshold1＜dfe _change ≤threshold2	0101
threshold2＜dfe _change≤threshold3 threshold2＜dfe _change ≤threshold3	1010
threshold3＜dfe _change threshold3＜dfe _change	1111

Table 2

Among them, threshold1, threshold2, and threshold3 are three defined thresholds. Different value ranges correspond to different transmission frequencies and correspond to different field values. After the transmitter receives the OAM frame, it can select the corresponding field according to the value. Value to determine the first frequency of the tracking signal.

207. The transmitter sends a tracking signal according to the first frequency.

After the transmitter receives the first frequency, it sends the tracking signal according to the first frequency and changes the transmission period of the tracking signal to ensure that the tracking signal can track channel changes in a timely and effective manner, so that the receiver can update the DFE coefficient in time.

In the technical solution provided in this embodiment, when the channel is stable, the transmitter sends a tracking signal to the receiver at a fixed frequency, and the receiver updates the DFE coefficients every time a tracking signal is received. The data signal is restored; when the channel changes greatly, the amount of change in the DFE coefficient at two moments will also increase. Therefore, the channel condition can be judged by comparing the amount of change in the DFE coefficient at adjacent moments. This implementation For example, change the sending frequency of the tracking signal according to the amount of change in the DFE coefficient. When the channel is unstable, the sending frequency of the tracking signal can be speeded up, which in turn affects the update speed of the DFE coefficient, so that the receiver can restore the received signal more accurately , To ensure that the system is stable and uninterrupted.

Please refer to FIG. 3, which is a schematic flowchart of another channel tracking method in an embodiment of the application, which is used to improve system reliability. As shown in FIG. 3, an embodiment of a channel tracking method provided by the present application includes:

301. The transmitter sends a first tracking signal to the receiver.

Step 301 is similar to step 201 in the embodiment shown in FIG. 2 and will not be repeated here.

302. The receiver determines the first DFE coefficient according to the first tracking signal.

Step 302 is similar to step 202 in the embodiment shown in FIG. 2 and will not be repeated here.

303. The transmitter sends a second tracking signal to the receiver.

Step 303 is similar to step 203 in the embodiment shown in FIG. 2 and will not be repeated here.

304. The receiver determines the second DFE coefficient according to the second tracking signal.

Step 304 is similar to step 204 in the embodiment shown in FIG. 2 and will not be repeated here.

305. The receiver determines the indication information corresponding to the tracking signal according to the first DFE coefficient and the second DFE coefficient.

The receiver can perceive the channel change according to the change of the DFE coefficient, and generate indication information according to the change of the DFE coefficient to prompt the transmitter to change the sending frequency of the tracking signal.

For example, the receiver may send reminder information to the transmitter, and the reminder information includes the amount of change in the DFE coefficient; the receiver may also determine the indicator according to the amount of change in the DFE coefficient, for the transmitter to identify the indicator, and to determine the indicator according to the indicator. The specific form of changing the transmission frequency of the tracking signal is not limited.

Exemplarily, if the change amount of the first DFE coefficient and the second DFE coefficient is greater than the preset threshold, it indicates that the channel is turbulent, and the receiver determines that the indication information corresponding to the tracking signal is to increase the transmission frequency of the tracking signal. Used to instruct the transmitter to change the sending frequency of the tracking signal at the next moment.

306. The receiver sends instruction information to the transmitter.

307. The transmitter determines the sending frequency of the tracking signal according to the instruction information.

After the transmitter receives the instruction information, it determines the tracking signal transmission frequency according to the instruction information. It is understandable that the transmitter can adjust the transmission frequency of the tracking signal according to its own ability, so that the tracking signal can sense channel changes in time and ensure that the receiver adjusts DFE in time. Coefficient, more effectively compensate the data signal.

308. The transmitter periodically sends a tracking signal according to the sending frequency.

In this embodiment, the transmitter can adjust the sending frequency of the tracking signal by itself according to the instruction information of the receiver, so that the transmitter can more flexibly control the transmission of the tracking signal, sense channel changes in time, effectively compensate for channel attenuation and phase distortion, and ensure system performance. Stability and reliability.

In the above-mentioned embodiments provided by the present application, the solutions of the communication methods provided by the embodiments of the present application are respectively introduced from the perspective of each network element itself and the interaction between each network element. It is understandable that each network element and device, such as the above-mentioned radio access network device, access and mobility management function network element, user equipment, data management function network element, and network slice selection function network element, in order to realize the above functions, Contains the corresponding hardware structure and/or software module to perform each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Please refer to FIG. 4, which is a schematic structural diagram of a receiving device 400 provided in an embodiment of the present application. As shown in FIG. 4, the receiving device 400 includes:

The receiving unit 401 is configured to receive at least two tracking signals sent by a transmitter, where the tracking signals are used by the receiving device 400 to adjust the DFE coefficient of the decision feedback equalizer;

The obtaining unit 402 is configured to obtain the first DFE coefficient and the second DFE coefficient according to the at least two tracking signals;

The indicating unit 403 is configured to instruct the transmitter to adjust the sending frequency of the tracking signal according to the first DFE coefficient and the second DFE coefficient.

Wherein, the receiving unit 401 performs step 201 and step 203 in the embodiment shown in FIG. 2 or the method described in step 301 and step 302 in the embodiment shown in FIG. 3, and the obtaining unit 402 performs step 202 and step 202 in the embodiment shown in FIG. Step 204 or the method described in step 302 and step 304 in the embodiment shown in FIG. 3, the instructing unit 403 executes the method described in step 205 and step 206 in the embodiment shown in FIG. 2 or the step 305 and step in the embodiment shown in FIG. 3 306 said method.

In another embodiment of the receiving device 400 provided in the embodiment of the present application, the indicating unit 403 is specifically configured to instruct the transmitter to adjust the coefficient according to the coefficient change of the first DFE coefficient and the second DFE coefficient The sending frequency of the tracking signal.

Wherein, the instruction unit 403 executes the method described in step 205 and step 206 in the embodiment shown in FIG. 2 or the method described in step 305 and step 306 in the embodiment shown in FIG. 3.

In another embodiment of a receiving device 400 provided in the embodiment of the present application, the indicating unit 403 includes a determining module 404 and a sending module 405;

The determining module 404 is configured to determine that the sending frequency of the tracking signal is the first frequency according to the coefficient variation of the first DFE coefficient and the second DFE coefficient;

The sending module 405 is configured to send the first frequency to the transmitter, so that the transmitter periodically sends the tracking signal according to the first frequency.

The determining module 404 executes the method described in step 205 in the embodiment shown in FIG. 2, and the sending module 405 executes the method described in step 206 in the embodiment shown in FIG. 2.

In another embodiment of the receiving device 400 provided in the embodiment of the present application, the determining module 404 is specifically configured to determine the frequency level corresponding to the coefficient change according to the threshold range of the coefficient change, where There is a mapping relationship between the threshold range and the frequency level; the first frequency is determined according to the frequency level.

The determining module 404 executes the method described in step 205 of the embodiment shown in FIG. 2.

In another embodiment of the receiving device 400 provided in the embodiment of the present application, when the value of the coefficient variation is larger, the frequency level is higher, and the first frequency is higher.

In another embodiment of the receiving device 400 provided in the embodiment of the present application, the sending module 405 is specifically configured to send a feedback message to the transmitter, and the feedback message includes a message field;

The indicating unit 403 is configured to indicate the first frequency according to the message field.

The sending module 405 executes the method described in step 206 of the embodiment shown in FIG. 2.

In another embodiment of the receiving device 400 provided in the embodiment of the present application, the indicating unit 403 is configured to determine the indication corresponding to the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient information;

The instruction unit 403 is further configured to send the instruction information to the transmitter, so that the transmitter determines the sending frequency of the tracking signal according to the instruction information.

Wherein, the instruction unit 403 executes the method described in step 305 and step 306 in the embodiment shown in FIG. 3.

In another embodiment of the receiving device 400 provided in the embodiment of the present application, the at least two tracking signals are the first tracking signal and the second tracking signal periodically sent by the transmitter;

The obtaining unit 402 is configured to obtain the first DFE coefficient according to the first tracking signal, and obtain the second DFE coefficient according to the second tracking signal.

Wherein, the obtaining unit 402 executes the method described in step 202 and step 204 in the embodiment shown in FIG. 2 or step 302 and step 304 in the embodiment shown in FIG. 3.

In another embodiment of the receiving device 400 provided in the embodiment of the present application, the first tracking signal and the second tracking signal are tracking signals at adjacent moments.

Please refer to FIG. 5, which is a schematic structural diagram of a transmitting device 500 provided in an embodiment of the present application. As shown in FIG. 5, the transmitting device 500 includes:

The sending unit 501 is configured to send at least two tracking signals to the receiver, where the tracking signals are used by the receiver to adjust the DFE coefficient of the decision feedback equalizer;

The receiving unit 502 is configured to receive a first message sent by the receiver, where the first message includes a transmission frequency, and the transmission frequency is determined by the receiver according to the first DFE coefficient and the second DFE coefficient;

The sending unit 501 is further configured to send the tracking signal according to the sending frequency.

The sending unit 501 executes the method described in step 201, step 203, and step 207 in the embodiment shown in FIG. 2; the receiving unit 502 executes the method described in step 206 in the embodiment shown in FIG.

Please refer to FIG. 6, which is a schematic structural diagram of a transmitting device 600 provided in an embodiment of the present application. As shown in FIG. 6, the transmitting device 600 includes:

The sending unit 601 is configured to send at least two tracking signals to the receiver, where the tracking signals are used by the receiver to adjust the DFE coefficient of the decision feedback equalizer;

The receiving unit 602 is configured to receive indication information sent by the receiver, where the indication information is determined by the receiver according to the first DFE coefficient and the second DFE coefficient;

The determining unit 603 is configured to determine the sending frequency of the tracking signal according to the indication information;

The sending unit 604 is further configured to periodically send the tracking signal according to the sending frequency.

The sending unit 601 executes the method described in step 301, step 303, and step 307 in the embodiment shown in FIG. 3; the receiving unit 602 executes the method described in step 306 in the embodiment shown in FIG. 3; the determining unit 602 executes the method shown in FIG. The method described in step 306 of the embodiment is shown.

Please refer to FIG. 7, which is a schematic structural diagram of a receiving device provided by an embodiment of this application, which includes a central processing unit 701, a memory 702, and a communication interface 703.

The memory 702 may be short-term storage or persistent storage. Furthermore, the central processing unit 701 may be configured to communicate with the memory 702, and execute a series of instruction operations in the memory 702 on the sending device.

In this embodiment, the central processing unit 701 can perform operations performed by the receiver in the embodiments shown in FIG. 2 and FIG. 3, and details are not described herein again.

In this embodiment, the specific functional module division in the central processing unit 701 may be similar to the functional module division of the receiving unit, acquiring unit, and indicating unit described in FIG. 4, and will not be repeated here.

Please refer to FIG. 8, which is a schematic structural diagram of a transmitting device provided by an embodiment of this application, which includes a central processing unit 801, a memory 802, and a communication interface 803.

The memory 802 may be short-term storage or persistent storage. Furthermore, the central processing unit 801 may be configured to communicate with the memory 802 and execute a series of instruction operations in the memory 802 on the sending device.

In this embodiment, the central processing unit 801 can perform the operations performed by the transmitter in the embodiment shown in FIG. 2, and details are not described herein again.

In this embodiment, the specific functional module division in the central processing unit 801 may be similar to the functional module division of the sending unit and the receiving unit described in FIG. 5, and will not be repeated here.

Please refer to FIG. 9, which is a schematic structural diagram of a transmitting device according to an embodiment of this application, which includes a central processing unit 901, a memory 902, and a communication interface 903.

The memory 902 may be short-term storage or persistent storage. Furthermore, the central processing unit 901 may be configured to communicate with the memory 902, and execute a series of instruction operations in the memory 902 on the sending device.

In this embodiment, the central processing unit 901 can perform operations performed by the transmitter in the embodiment shown in FIG. 3, and details are not described herein again.

In this embodiment, the specific functional module division in the central processing unit 901 may be similar to the functional module division of the sending unit, the receiving unit, and the determining unit described in FIG. 6, and will not be repeated here.

An embodiment of the present application also provides a channel tracking system, including: a receiving device as shown in FIG. 4 or FIG. 7 and a transmitting device as shown in FIG. 5 or FIG. 8.

An embodiment of the present application also provides a channel tracking system, including: a receiving device as shown in FIG. 4 or FIG. 7 and a transmitting device as shown in FIG. 6 or FIG. 9.

The embodiment of the present application also provides a chip or chip system. The chip or chip system includes at least one processor and a communication interface. The communication interface and the at least one processor are interconnected through a wire. One or more steps in the method embodiment shown in FIG. 2 or FIG. 3, or optional implementation manners thereof, are used to implement the function of the receiving device in the foregoing method.

In a possible implementation, the chip or chip system described above further includes at least one memory, and instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, for example, a register, a cache, etc., or a storage unit of the chip (for example, a read-only memory, a random access memory, etc.).

The embodiments of the present application also provide a chip or chip system. The chip or chip system includes at least one processor and a communication interface. The communication interface and the at least one processor are interconnected by wires, and the at least one processor is used to run computer programs or instructions. To perform the execution method of the transmitting device described in any one of the possible implementation manners of the embodiments shown in FIG. 2 and FIG. 3;

The embodiment of the present application further provides a computer storage medium, and the computer storage medium stores computer program instructions for implementing the function of the receiving device in the channel tracking method provided in the embodiment of the present application.

The embodiment of the present application also provides a computer storage medium, and the computer storage medium stores computer program instructions for implementing the transmitting device in the channel tracking method provided in the embodiment of the present application.

The embodiment of the present application also provides a computer program product. The computer program product includes computer software instructions that can be loaded by a processor to implement the process in the channel tracking method shown in FIG. 2 or FIG. 3.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part.

Those skilled in the art can clearly understand that, for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described 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 they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium. , Including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), magnetic disks or optical disks and other media that can store program codes. .

Claims

A channel tracking method, characterized in that the method includes:

The receiver receives at least two tracking signals sent by the transmitter, where the tracking signals are used by the receiver to adjust the DFE coefficients of the decision feedback equalizer;

Obtaining, by the receiver, a first DFE coefficient and a second DFE coefficient according to the at least two tracking signals;

The receiver instructs the transmitter to adjust the sending frequency of the tracking signal according to the first DFE coefficient and the second DFE coefficient.
The method according to claim 1, wherein the instructing the transmitter to adjust the sending frequency of the tracking signal by the receiver according to the first DFE coefficient and the second DFE coefficient comprises:

The receiver instructs the transmitter to adjust the sending frequency of the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient.
The method according to claim 2, wherein the receiver instructing the transmitter to adjust the sending frequency of the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient comprises:

Determining, by the receiver, the transmission frequency of the tracking signal as the first frequency according to the coefficient variation of the first DFE coefficient and the second DFE coefficient;

The receiver transmits the first frequency to the transmitter, so that the transmitter periodically transmits the tracking signal according to the first frequency.
The method according to claim 3, wherein the receiver determines that the sending frequency of the tracking signal is the first frequency according to the coefficient variation of the first DFE coefficient and the second DFE coefficient, comprising:

The receiver determines the frequency level corresponding to the coefficient change according to the threshold range in which the coefficient change is located, wherein there is a mapping relationship between the threshold range and the frequency level;

The receiver determines the first frequency according to the frequency level.
The method according to claim 4, wherein when the value of the coefficient change is larger, the frequency level is higher, and the first frequency is higher.
The method according to claims 3 to 5, wherein the sending of the first frequency by the receiver to the transmitter comprises:

Sending, by the receiver, a feedback message to the transmitter, the feedback message including message fields;

The receiver indicates the first frequency according to the message field.
The method according to claim 2, wherein the receiver instructing the transmitter to adjust the sending frequency of the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient comprises:

Determining, by the receiver, the indication information corresponding to the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient;

The receiver sends the indication information to the transmitter, so that the transmitter determines the sending frequency of the tracking signal according to the indication information.
The method according to claims 1 to 7, wherein the at least two tracking signals are a first tracking signal and a second tracking signal periodically sent by the transmitter, and the receiver is based on the at least two tracking signals. Obtaining the first DFE coefficient and the second DFE coefficient for one tracking signal, including:

The receiver obtains the first DFE coefficient according to the first tracking signal, and obtains the second DFE coefficient according to the second tracking signal.
8. The method according to claim 8, wherein the first tracking signal and the second tracking signal are tracking signals at adjacent moments.
A channel tracking method, characterized in that the method includes:

The transmitter sends at least two tracking signals to the receiver, where the tracking signals are used by the receiver to adjust the DFE coefficients of the decision feedback equalizer;

Receiving, by the transmitter, a first message sent by the receiver, where the first message includes a transmission frequency, and the transmission frequency is determined by the receiver according to a first DFE coefficient and a second DFE coefficient;

The transmitter transmits the tracking signal according to the transmission frequency.
A channel tracking method, characterized in that the method includes:

The transmitter sends at least two tracking signals to the receiver, where the tracking signals are used by the receiver to adjust the DFE coefficients of the decision feedback equalizer;

Receiving, by the transmitter, indication information sent by the receiver, where the indication information is determined by the receiver according to the first DFE coefficient and the second DFE coefficient;

Determining, by the transmitter, the sending frequency of the tracking signal according to the indication information;

The transmitter periodically transmits the tracking signal according to the transmission frequency.
A receiving device, characterized in that the receiving device includes:

A receiving unit, configured to receive at least two tracking signals sent by a transmitter, where the tracking signals are used by the receiving device to adjust the DFE coefficient of the decision feedback equalizer;

An obtaining unit, configured to obtain a first DFE coefficient and a second DFE coefficient according to the at least two tracking signals;

The indicating unit is configured to instruct the transmitter to adjust the sending frequency of the tracking signal according to the first DFE coefficient and the second DFE coefficient.
The receiving device according to claim 12, wherein the indicating unit is specifically configured to instruct the transmitter to adjust the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient. Send frequency.
The receiving device according to claim 13, wherein the indicating unit includes a determining module and a sending module;

The determining module is configured to determine that the sending frequency of the tracking signal is the first frequency according to the coefficient variation of the first DFE coefficient and the second DFE coefficient;

The sending module is configured to send the first frequency to the transmitter, so that the transmitter periodically sends the tracking signal according to the first frequency.
The receiving device according to claim 14, wherein the determining module is specifically configured to determine the frequency level corresponding to the coefficient change according to the threshold range of the coefficient change, wherein the threshold range and The frequency level has a mapping relationship; the first frequency is determined according to the frequency level.
The receiving device according to claim 15, wherein when the value of the coefficient variation is larger, the frequency level is higher, and the first frequency is higher.
The receiving device according to claims 14 to 16, wherein the sending module is specifically configured to send a feedback message to the transmitter, and the feedback message includes a message field;

The indicating unit is configured to indicate the first frequency according to the message field.
The receiving device according to claim 13, wherein the indication unit is configured to determine the indication information corresponding to the tracking signal according to the coefficient variation of the first DFE coefficient and the second DFE coefficient;

The instruction unit is further configured to send the instruction information to the transmitter, so that the transmitter determines the sending frequency of the tracking signal according to the instruction information.
The receiving device according to claims 12 to 18, wherein the at least two tracking signals are a first tracking signal and a second tracking signal periodically sent by the transmitter;

The obtaining unit is configured to obtain the first DFE coefficient according to the first tracking signal, and obtain the second DFE coefficient according to the second tracking signal.
The receiving device according to claim 19, wherein the first tracking signal and the second tracking signal are tracking signals at adjacent moments.
A transmitting device, characterized in that the transmitting device includes:

A sending unit, configured to send at least two tracking signals to the receiver, where the tracking signals are used by the receiver to adjust the DFE coefficients of the decision feedback equalizer;

A receiving unit, configured to receive a first message sent by the receiver, where the first message includes a transmission frequency, and the transmission frequency is determined by the receiver according to the first DFE coefficient and the second DFE coefficient;

The sending unit is further configured to send the tracking signal according to the sending frequency.
A transmitting device, characterized in that the transmitting device includes:

A sending unit, configured to send at least two tracking signals to the receiver, where the tracking signals are used by the receiver to adjust the DFE coefficients of the decision feedback equalizer;

A receiving unit, configured to receive indication information sent by the receiver, where the indication information is determined by the receiver according to the first DFE coefficient and the second DFE coefficient;

A determining unit, configured to determine the sending frequency of the tracking signal according to the indication information;

The sending unit is further configured to periodically send the tracking signal according to the sending frequency.
A receiving device, comprising: at least one processor and a memory, the memory stores computer-executable instructions that can run on the processor, and when the computer-executable instructions are executed by the processor, the processor executes the above-mentioned rights The method described in any one of the possible implementation manners of claim 1 to claim 9.
A transmitting device, comprising: at least one processor and a memory. The memory stores computer-executable instructions that can run on the processor. When the computer-executable instructions are executed by the processor, the processor executes the rights as described above. The method described in claim 10.
A transmitting device, comprising: at least one processor and a memory. The memory stores computer-executable instructions that can run on the processor. When the computer-executable instructions are executed by the processor, the processor executes the rights as described above. The method described in claim 10.
A channel tracking system, comprising: a receiving device and a transmitting device, the receiving device is the receiving device according to any one of claims 12 to 20, and the transmitting device is the receiving device according to claim 21 or 22. The described launching equipment.
A computer-readable storage medium storing one or more computer-executable instructions, wherein when the computer-executable instructions are executed by a processor, the processor executes any one of the preceding claims 1 to 11 Methods.