A joint channel estimation method and related devices

Abstract

Embodiments of this application disclose a joint channel estimation method and related devices, which are used to improve channel estimation performance without increasing pilots. The method of the embodiments of this application includes: if the access network device determines that the terminal device meets a preset condition, the access network device adjusts the amplitude difference between the first subframe slot and the second slot; the access network device eliminates the timing difference between the first slot and the second slot; the access network device determines the joint channel estimation values corresponding to the first slot and the second slot.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of data processing, and in particular, to a joint channel estimation method and related devices. Background Art

[0002] The performance of a mobile wireless communication system is greatly affected by the wireless channel, such as shadow fading and frequency selective fading, etc., making the propagation path between the access network device and the terminal device very complex. The wireless channel is not fixed and predictable like a wired channel, but has great randomness. Therefore, channel estimation is required in the coherent detection of a mobile wireless communication system, and the accuracy of channel estimation will directly affect the performance of the entire system.

[0003] In the existing new radio (NR) network protocol, the access network device and the terminal device can configure a preamble and zero or three additional pilots for the channel, or can configure two preambles and zero or two additional pilots for the channel. The preamble and the additional pilots are used for channel estimation. The faster the moving speed of the terminal device, the higher the requirement for the time-domain density of the pilots. In the existing channel estimation schemes, usually, channel estimation is first performed according to each pilot signal, then frequency offset estimation and frequency offset phase compensation are performed, and finally, channel estimation of the physical uplink shared channel data symbols is performed.

[0004] In the existing channel estimation schemes, on the one hand, channel estimation can only be performed according to the configured pilot signals. When the moving speed of the terminal increases, only by increasing the pilots can the normal channel estimation quality be ensured, resulting in waste of network resources; on the other hand, when the number of configured pilot signals reaches the maximum value supported by the protocol, the performance of channel estimation cannot be improved. Summary of the Invention

[0005] The embodiments of the present application provide a joint channel estimation method and related devices for improving the performance of channel estimation without increasing pilots.

[0006] The embodiments of the present application provide a joint channel estimation method for improving the performance of channel estimation without increasing pilots. The method includes: if the access network device determines that the terminal device meets a preset condition, the access network device adjusts the amplitude difference between the first subframe slot and the second slot; the access network device eliminates the timing difference between the first slot and the second slot; the access network device determines the joint channel estimation value corresponding to the first slot and the second slot.

[0007] In this possible implementation, the access network device adjusts the amplitude difference between the first slot and the second slot and eliminates the timing difference between the first slot and the second slot, so as to determine the combined channel estimation value corresponding to the first slot and the second slot. On the one hand, this enables the access network device to perform channel estimation without additional pilots; on the other hand, when the number of configured pilots reaches the protocol limit, the access network device can still improve the performance of channel estimation.

[0008] In one possible implementation of the first aspect, the above-mentioned access network device adjusts the amplitude difference between the first slot and the second slot, including: the access network device obtains the power back-off amount of the first slot and the power back-off amount of the second slot of the terminal device, and the first slot and the second slot are adjacent slots; the access network device converts the amplitude difference value between the first slot and the second slot into an amplitude difference linear value, and the amplitude difference value is the difference between the power back-off amount of the first slot and the power back-off amount of the second slot; the access network device multiplies the amplitude difference linear value by the channel estimation value of the pilot of the second slot.

[0009] In this possible implementation, a method for equalizing the amplitudes of adjacent first slot and second slot is specifically provided.

[0010] In one possible implementation of the first aspect, the above-mentioned access network device eliminates the timing difference between the first slot and the second slot, including: the access network device determines the timing adjustment estimation value; the access network device adjusts the timing of the first slot according to the timing adjustment estimation value.

[0011] In this possible implementation, a method for the access network device to adjust the timing difference between the first slot and the second slot is specifically provided, which improves the feasibility of the embodiments of the present application.

[0012] In one possible implementation of the first aspect, the above-mentioned access network device determines that the terminal device meets the preset conditions, including: the access network device determines that the positions of the user scheduling resource blocks of the first slot and the second slot are the same, and the access network device determines that the terminal device has no timing adjustment; or the access network device determines that the positions of the user scheduling resource blocks of the first slot and the second slot are the same.

[0013] In this possible implementation, the access network device can determine the preset conditions for combined channel estimation, so that the user can correspondingly adjust the device for combined channel estimation, making the embodiments of the present application flexibly implementable.

[0014] In a possible implementation of the first aspect, the above access network device determines the combined channel estimation values corresponding to the first slot and the second slot, including: the access network device determines the combined channel estimation values according to the adjusted timing, amplitude difference linear value of the first slot, and the product of the channel estimation values of the pilots in the first slot and the second slot.

[0015] In the embodiments of the present application, the access network device adjusts the amplitude difference between the first slot and the second slot and eliminates the timing difference between the first slot and the second slot, so as to determine the combined channel estimation values corresponding to the first slot and the second slot. On the one hand, it enables the access network device to perform channel estimation without additional pilots; on the other hand, when the number of configured pilots reaches the protocol limit, the access network device can still improve the performance of channel estimation.

[0016] The second aspect of the present application provides an access network device, which has the function of implementing the method of the above first aspect or any possible implementation manner of the first aspect. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions, such as: a determination module.

[0017] The third aspect of the present application provides an access network device, which includes at least one processor, a memory, an input / output (I / O) interface, and computer-executable instructions stored in the memory and executable on the processor. When the computer-executable instructions are executed by the processor, the processor executes the method of the above first aspect or any possible implementation manner of the first aspect.

[0018] The fourth aspect of the present application provides a computer-readable storage medium storing one or more computer-executable instructions. When the computer-executable instructions are executed by the processor, the processor executes the method of the above first aspect or any possible implementation manner of the first aspect.

[0019] The fifth aspect of the present application provides a computer program product storing one or more computer-executable instructions. When the computer-executable instructions are executed by the processor, the processor executes the method of the above first aspect or any possible implementation manner of the first aspect.

[0020] The sixth aspect of the present application provides a chip system, which includes at least one processor. The at least one processor is used to implement the functions involved in the above-mentioned first aspect or any possible implementation manner of the first aspect. In a possible design, the chip system may further include a memory, which is used to store the necessary program instructions and data for the device to process the artificial intelligence model. The chip system may be composed of chips or may include chips and other discrete devices.

[0021] As can be seen from the above technical solutions, the embodiments of the present application have the following advantages:

[0022] In the embodiments of the present application, the access network device adjusts the amplitude difference between the first slot and the second slot and eliminates the timing difference between the first slot and the second slot, so as to determine the combined channel estimation value corresponding to the first slot and the second slot. On the one hand, it enables the access network device to perform channel estimation without additional pilots; on the other hand, when the number of configured pilots reaches the protocol limit, the access network device can still improve the performance of channel estimation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic flowchart of a channel estimation method;

[0024] Figure 2 It is a network architecture diagram of a channel estimation method;

[0025] Figure 3 It is a schematic flowchart of the combined channel estimation method in the embodiments of the present application;

[0026] Figure 4 It is another schematic flowchart of the combined channel estimation method in the embodiments of the present application;

[0027] Figure 5 It is a schematic structural diagram of the access network device in the embodiments of the present application;

[0028] Figure 6 It is another schematic structural diagram of the access network device in the embodiments of the present application;

[0029] Figure 7 It is a schematic structural diagram of a wireless mobile communication system in the embodiments of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The embodiments of the present application provide a combined channel estimation method and related devices, which are used to improve the performance of channel estimation without increasing pilots.

[0031] The embodiments of the present application will be described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Those of ordinary skill in the art will know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0032] The terms "first", "second", etc. in the specification and claims of the present application and the above accompanying drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments described here can be implemented in an order other than that shown or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] As Figure 1 shown, the performance of a mobile wireless communication system is greatly affected by the wireless channel, such as shadow fading and frequency-selective fading, etc., making the propagation path between the access network device and the terminal device very complex. The wireless channel is not fixed and predictable like a wired channel, but has great randomness. Therefore, channel estimation is required in the coherent detection of a mobile wireless communication system, and the accuracy of channel estimation will directly affect the performance of the entire system. In the existing new radio (NR) network protocol, the access network device and the terminal device can configure a preamble and zero or three additional pilots for the channel, or can configure two preambles for the channel and zero or two additional pilots. The preamble and additional pilots are used for channel estimation. The faster the moving speed of the terminal device, the higher the requirement for the time-domain density of the pilots. The existing channel estimation schemes usually first perform channel estimation according to each pilot signal, then perform frequency offset estimation and frequency offset phase compensation, and finally perform physical uplink shared channel data symbol channel estimation.

[0034] As Figure 2As shown in the figure, in the embodiments of the present application, the access network device involved is a device deployed in a radio access network to provide wireless communication functions for terminal devices. The access network device may include various forms of macro base stations, micro base stations (i.e., small stations), relay stations, access points, etc. In systems adopting different radio access technologies, the name of the access network device may be different. For example, the Base Transceiver Station (BTS) in the Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) network, the Node B (NB) in the Wideband Code Division Multiple Access (WCDMA), the eNB or eNodeB (Evolutional NodeB) in the Long Term Evolution (LTE). The access network device may also be a radio controller in the Cloud Radio Access Network (CRAN) scenario. The access network device may also be a base station device in a 5G network or an access network device in a future evolved PLMN network. The access network device may also be a wearable device or a vehicle-mounted device. The access network device may also be a Transmission and Reception Point (TRP).

[0035] In the embodiments of the present application, the terminal devices involved may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem that have wireless communication functions. The terminal device may be a Mobile Station (MS), subscriber unit, cellular phone, smart phone, wireless data card, Personal Digital Assistant (PDA) computer, tablet computer, wireless modem, handset, laptop computer, and Machine Type Communication (MTC) and other terminal devices.

[0036] Based on the mobile wireless communication system including the above-mentioned access network device and terminal device, the joint channel estimation method in the embodiments of the present application will be described below:

[0037] Please refer toFigure 3 , one process of the joint channel estimation method in the embodiments of the present application includes:

[0038] 301. The access network device receives the pilot signal sent by the terminal device.

[0039] The access network device receives the pilot signal sent by the terminal device. The pilot signal may include a preamble pilot and an additional pilot.

[0040] 302. The access network device determines that the terminal device meets the preset condition.

[0041] The access network device determines that the terminal device meets the preset condition for joint channel estimation. Specifically, if the access network device determines that the positions of the user scheduling resource blocks in the first subframe slot and the second slot are the same, the access network device determines that the terminal device meets the preset condition, that is, the access network device determines that joint channel estimation can be performed.

[0042] Specifically, the preset condition may be that the positions of the user scheduling resource blocks in the first subframe slot and the second slot are the same, or the terminal device has no timing adjustment. In addition, it may also be other preset conditions related to the terminal device. For example, it may be that the positions of the user scheduling resource blocks in the first subframe slot and the second slot are the same, and the terminal device has no timing adjustment; specifically, it is not limited here.

[0043] In the embodiments of the present application, for the access network device to determine whether the terminal device has timing adjustment, specifically, the access network device segments the scheduling physical resource block (PRB), and then determines the maximum frequency offset estimation difference between the first subframe slot and the second slot. This subframe is a subframe of a radio frame, and the first slot and the second slot are adjacent subframes. The maximum frequency offset estimation difference is the maximum value among the multiple differences of the frequency offset estimation values of each segment of the PRB in the first slot and the second slot. Then, the access network device determines whether the maximum frequency offset estimation difference is greater than a preset value. If the maximum frequency offset estimation difference is greater than the preset value, the access network device determines that the terminal device has no timing adjustment. If the maximum frequency offset estimation difference is less than the preset value, the access network device determines that the terminal device has timing adjustment.

[0044] In a possible implementation, if the access network device determines that the terminal device does not meet the preset condition for joint channel estimation, the access network device will not perform subsequent amplitude adjustment, timing adjustment, and joint channel estimation, but will perform the original single-pilot channel estimation.

[0045] 303. The access network device adjusts the amplitude difference between the first slot and the second slot.

[0046] The access network device adjusts the amplitude difference between the first slot and the second slot. Specifically, the amplitude difference between the first slot and the second slot is essentially the difference caused by the different power spectrum density. Power spectrum density, that is, the energy allocated to each resource element (RE) by the actual active power of the access network device. The actual active power of the access network device is the active power of the access network device minus the power backoff amount. The greater the actual active power of the access network device, the smaller the total number of REs, and the greater the spectrum density. The first slot and the second slot are adjacent slots, and the corresponding number of REs and the active power of the access network device are often the same. Therefore, in order to adjust the amplitude difference between the first slot and the second slot, it is often achieved by adjusting the difference in power backoff between the first slot and the second slot.

[0047] The access network device adjusts the amplitude difference between the first slot and the second slot in the following steps:

[0048] a. The access network device obtains the power backoff amount of the first slot and the power backoff amount of the second slot of the terminal device. The modulation modes corresponding to the first slot and the second slot are different, which affects the power backoff amount of the first slot and the second slot differently. The first slot and the second slot are adjacent slots. The different power backoff amounts of the first slot and the second slot may also be affected by other factors, which are not limited here.

[0049] b. The access network device converts the amplitude difference value between the first slot and the second slot into an amplitude difference linear value, where the amplitude difference value is the difference between the power backoff amount of the first slot and the power backoff amount of the second slot.

[0050] c. The access network device multiplies the amplitude difference linear value by the channel estimation value of the pilot of the second slot. The product is the corrected pilot channel estimation value of the second slot, thereby correcting the pilot channel estimation value of the second slot.

[0051] 304. The access network device eliminates the timing difference between the first slot and the second slot.

[0052] The access network device first determines the estimated value of the timing adjustment, and then adjusts the timing of the first slot according to the estimated value of the timing adjustment, thereby eliminating the timing difference between the first slot and the second slot. This timing is called timing advance (TA), which is generally used for UE uplink transmission. The timing advance refers to the amount of advance of sending data packets in advance by a corresponding time in order to make the uplink packet of the user equipment arrive at the base station device at the desired time, estimating the radio frequency transmission delay caused by the distance.

[0053] Specifically, the access network device first assumes that the timing adjustment value is within the range of {-nTs, nTs}, where Ts is the unit of timing. It determines the phase deviation between slots according to the assumed timing adjustment value, and then performs a matching search process with the actual value, and takes the one with the highest matching degree as the timing adjustment estimated value. Then, the access network device adjusts the timing according to the timing adjustment estimated value. The specific adjustment method is as follows:

[0054] H2(k, t) = H1(k, t) * e j*M , M = 2π * Nts * (k + L + S (i) +1024) / 2048.

[0055] Among them, k refers to the subcarrier index, t refers to the symbol index. Here, t can be changed to nslot = 1, e is a constant, L is the system guard band, S (i) is the starting position of the user resource block (RB), and Nts is the timing adjustment estimated value.

[0056] 305. The access network device determines the joint channel estimation value.

[0057] The access network device determines the joint channel estimation value according to the product of the determined adjusted timing and the amplitude difference linear value and the channel estimation values of the pilots in the first slot and the second slot. The specific calculation method is as follows:

[0058] H PUSCH (l, k) = W1 * H DMRS (n slot = 0, k) + J * W2 * H DMRS (n slot = 1, k)

[0059] Among them, W1 and W2 are weighting coefficients. The above formula represents obtaining the data symbol channel estimation value through interpolation of the two pilot channel estimations. J is the amplitude difference linear value between the first slot and the second slot in step 303.

[0060] Next, the access network device in the embodiment of the present application will be described. Please refer to Figure 5 , an access network device 500 provided in the embodiment of the present application. This access network device can be the above-mentioned Figure 3 access network device. The access network device 500 includes:

[0061] The second determination module 501 is used to determine that the positions of the user scheduling resource blocks in the first slot and the second slot are the same. For the specific implementation method, please refer to Figure 3In the embodiment shown, step 301: The access network device determines that the terminal device meets the preset conditions, which will not be elaborated here.

[0062] In a possible implementation manner, the above-mentioned second determination module 501 includes:

[0063] A third determination unit 502, configured to determine the maximum frequency offset estimation difference between the first slot and the second slot, where the maximum frequency offset estimation difference is the maximum value of the differences between the frequency offset estimation values of each PRB of the first slot and the second slot; for the specific implementation manner, please refer to Figure 3 In the embodiment shown, step 302: The access network device determines that the terminal device meets the preset conditions, which will not be elaborated here.

[0064] A fourth determination unit 503, configured to determine that the terminal device has no timing adjustment if it is greater than a preset value. For the specific implementation manner, please refer to Figure 3 In the embodiment shown, step 302: The access network device determines that the terminal device meets the preset conditions, which will not be elaborated here.

[0065] An adjustment module 504, configured to adjust the amplitude difference between the first slot and the second slot if the access network device determines that the terminal device meets the preset conditions; for the specific implementation manner, please refer to Figure 3 In the embodiment shown, step 303: The access network device adjusts the amplitude difference between the first slot and the second slot, which will not be elaborated here.

[0066] The above-mentioned adjustment module 504 includes:

[0067] An acquisition unit 505, configured to acquire the power back-off amount of the first slot of the terminal device and the power back-off amount of the second slot, where the first slot and the second slot are adjacent slots; for the specific implementation manner, please refer to Figure 3 In the embodiment shown, step 303: The access network device adjusts the amplitude difference between the first slot and the second slot, which will not be elaborated here.

[0068] A conversion unit 506, configured to convert the amplitude difference value between the first slot and the second slot into an amplitude difference linear value, where the amplitude difference value is the difference between the power back-off amount of the first slot and the power back-off amount of the second slot; for the specific implementation manner, please refer to Figure 3 In the embodiment shown, step 303: The access network device adjusts the amplitude difference between the first slot and the second slot, which will not be elaborated here.

[0069] A first determination unit 507, configured to determine the product of the amplitude difference linear value and the channel estimation value of the pilot of the second slot. For the specific implementation manner, please refer to Figure 3Step 303 in the illustrated embodiment: The access network device adjusts the amplitude difference between the first slot and the second slot, which will not be elaborated here.

[0070] The elimination module 508 is used to eliminate the timing difference between the first slot and the second slot; for the specific implementation method, please refer to Figure 3 Step 304 in the illustrated embodiment: The access network device eliminates the timing difference between the first slot and the second slot, which will not be elaborated here.

[0071] The above-mentioned elimination module 508 includes:

[0072] The second determination unit 509 is used to determine the timing adjustment estimated value; for the specific implementation method, please refer to Figure 3 Step 304 in the illustrated embodiment: The access network device eliminates the timing difference between the current TTI and the next TTI, which will not be elaborated here.

[0073] The adjustment unit 510 is used to adjust the timing of the current TTI according to the timing adjustment estimated value. For the specific implementation method, please refer to Figure 3 Step 304 in the illustrated embodiment: The access network device eliminates the timing difference between the current TTI and the next TTI, which will not be elaborated here.

[0074] The first determination module 511 is used to determine the combined channel estimation value corresponding to the first slot and the second slot. The first determination module 511 is specifically used to determine the combined channel estimation value according to the product of the adjusted timing of the first slot, the linear value of the amplitude difference, and the channel estimation value of the pilots of the first slot and the second slot. For the specific implementation method, please refer to Figure 3 Step 305 in the illustrated embodiment: The access network device determines the combined channel estimation value, which will not be elaborated here.

[0075] In this embodiment, the access network device can perform the operations performed by the access network device in any one of the foregoing Figure 3 illustrated embodiments, which will not be elaborated here specifically.

[0076] Figure 6 FIG. is a schematic structural diagram of an access network device provided by an embodiment of the present application. The access network device 600 may include one or more central processing units (CPUs) 601 and a memory 605, and one or more application programs or data are stored in the memory 605.

[0077] Among them, the memory 605 can be volatile storage or persistent storage. The program stored in the memory 605 may include one or more modules, and each module may include a series of instruction operations in the access network device. Further, the central processing unit 601 may be configured to communicate with the memory 605 and execute a series of instruction operations in the memory 605 on the access network device 600.

[0078] Among them, the central processing unit 601 is used to execute the computer program in the memory 605, so that the access network device 600 is used to execute: if the access network device determines that the terminal device meets the preset conditions, the access network device adjusts the amplitude difference between the first slot and the second slot; the access network device eliminates the timing difference between the first slot and the second slot; the access network device determines the combined channel estimation values corresponding to the first slot and the second slot; for the specific implementation manner, please refer to Figure 3 Steps 301-305 in the illustrated embodiment, which will not be elaborated here.

[0079] The access network device 600 may further include one or more power supplies 602, one or more wired or wireless network interfaces 603, one or more input / output interfaces 604, and / or one or more operating systems, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

[0080] The access network device 600 can perform the operations performed by the access network device in the foregoing Figure 3 illustrated embodiment, which will not be elaborated here specifically.

[0081] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, which will not be elaborated here.

[0082] Figure 7 It is a schematic structural diagram of a mobile wireless communication system provided by an embodiment of the present application. The mobile wireless communication system 700 may include an access network device 701 and a terminal device 702. The access network device 701 and the terminal device 702 can respectively perform the operations performed by the access network device in any one of the foregoing Figure 3 illustrated embodiments. For the specific implementation manner, please refer to Figure 3 Steps 301-305 in the illustrated embodiment, which will not be elaborated here.

[0083] In several embodiments provided by this application, it should be understood that the disclosed systems, devices, and methods 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. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0084] 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 can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0085] In addition, the functional units in each embodiment of this application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0086] If the above-mentioned 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 such an understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of this application. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM, read-only memory), random access memories (RAM, random access memory), magnetic disks, or optical discs and other various media that can store program codes.

Claims

1. A joint channel estimation method, characterized in that, The method includes: If the access network device determines that the terminal device meets a preset condition, the access network device adjusts the amplitude difference between the first subframe slot and the second slot; The access network device eliminates the timing difference between the first slot and the second slot; The access network device determines the joint channel estimation value corresponding to the first slot and the second slot; The access network device adjusts the amplitude difference between the first slot and the second slot, including: The access network device obtains the power back-off amount of the first slot of the terminal device and the power back-off amount of the second slot, where the first slot and the second slot are adjacent slots; The access network device converts the amplitude difference value between the first slot and the second slot into an amplitude difference linear value, and the amplitude difference value is the difference between the power back-off amount of the first slot and the power back-off amount of the second slot; The access network device multiplies the amplitude difference linear value by the channel estimation value of the pilot of the second slot; The access network device determines the joint channel estimation value corresponding to the first slot and the second slot, including: The access network device determines the joint channel estimation value according to the adjusted timing of the first slot, the amplitude difference linear value, and the product of the channel estimation values of the pilots of the first slot and the second slot.

2. The method according to claim 1, characterized in that, The access network device eliminates the timing difference between the first slot and the second slot, including: The access network device determines the timing adjustment estimation value; The access network device adjusts the timing of the first slot according to the timing adjustment estimation value.

3. The method according to claim 2, wherein The access network device determines that the terminal device meets the preset condition, including: The access network device determines that the positions of the user scheduling resource blocks of the first slot and the second slot are the same.

4. An access network device, characterized in that, The access network device includes: An adjustment module, configured to adjust the amplitude difference between the first subframe slot and the second slot if the access network device determines that the terminal device meets a preset condition; An elimination module, configured to eliminate the timing difference between the first slot and the second slot; A first determination module, configured to determine the joint channel estimation value corresponding to the first slot and the second slot. The adjustment module includes: An acquisition unit, configured to acquire the power back-off amount of the first slot of the terminal device and the power back-off amount of the second slot, where the first slot and the second slot are adjacent slots; A conversion unit, configured to convert the amplitude difference value between the first slot and the second slot into an amplitude difference linear value, and the amplitude difference value is the difference between the power back-off amount of the first slot and the power back-off amount of the second slot; A first determination unit, configured to determine the product of the amplitude difference linear value and the channel estimation value of the pilot of the second slot; The first determination module is specifically configured to: Determine a joint channel estimation value based on the timing adjusted according to the first slot, the linear value of the amplitude difference, and the product of the channel estimation values of the pilots of the first slot and the second slot.

5. The access network device according to claim 4, wherein The cancellation module includes: A second determination unit, configured to determine a timing adjustment estimation value; An adjustment unit, configured to adjust the timing of the first slot according to the timing adjustment estimation value.

6. The access network device according to claim 5, characterized in that The access network device further includes a second determination module, and the second determination module is configured to: Determine that the positions of the user scheduling resource blocks of the first slot and the second slot are the same.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method according to any one of claims 1-3.

8. A controller, characterized in that, Comprising a processor and a computer-readable storage medium storing a computer program; The processor is coupled to the computer-readable storage medium, and when the computer program is executed by the processor, it implements the method according to any one of claims 1-3.

9. A chip system, characterized in that, Comprising a processor, and the processor is called to execute the method according to any one of claims 1-3.

10. A mobile radio communication system, characterized in that, Comprising an access network device and a terminal device, and the access network device communicates with the terminal device; The access network device is configured to implement the method according to any one of claims 1-3.

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