Pilot guard band dynamic adjustment method and system, electronic device, and storage medium

Abstract

The application discloses a pilot guard band dynamic adjustment method and system, electronic equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: performing high-precision channel measurement based on a time delay-Doppler domain pilot structure, and constructing a time-varying parameter matrix; establishing a time delay-Doppler domain resource grid mapping relationship based on the time-varying parameter, and determining a pilot guard band; and performing adaptive optimization on the pilot guard band, and dynamically adjusting the pilot guard band range. The application utilizes a double-layer adaptive mechanism, solves the multi-scale nonlinear adaptation problem of the pilot guard band in a high dynamic scene, dynamically adjusts the pilot guard band configuration, solves the pilot pollution problem caused by the asymmetric change of the time delay and the Doppler during the satellite overtop, realizes intelligent optimization of the pilot guard band configuration, can optimize the guard band range in real time according to the channel quality, enhances the anti-interference capability when the channel is deteriorated, quickly releases the resources when the channel is recovered, and balances the system robustness and the spectrum efficiency.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a method and system for dynamic adjustment of pilot protection band, electronic equipment, and storage medium. Background Technology

[0002] With the rapid development of low-Earth orbit satellite communication and ultra-high-speed mobile terminals, Doppler spread and delay spread in time-varying channels pose serious challenges to traditional modulation techniques. Orthogonal Time Frequency Space (OTFS) technology, by mapping signals to the Delay-Doppler Domain (DD) and utilizing two-dimensional orthogonal basis functions, effectively combats the time-frequency dual-selective fading of the channel, becoming a key solution to communication bottlenecks in high-speed scenarios. However, the performance of OTFS systems is highly dependent on the dynamic configuration of the pilot guard band: insufficient guard bands lead to interference between pilot and data symbols, reducing channel estimation accuracy; excessive guard bands, on the other hand, result in wasted spectrum resources.

[0003] Existing technologies mostly configure guard bands based on static rules or single-dimensional parameters (such as Doppler shift). Especially when satellite signals are disturbed by the ionosphere or the terminal moves at high speed, the rapid degradation of the signal-to-noise ratio (SNR) and the sudden jump in channel parameters will significantly aggravate inter-symbol interference. Traditional fixed threshold models lack the ability to perceive the joint evolution of multi-dimensional states in real time, resulting in the guard band configuration being lagging or even failing. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and provide a method and system for dynamic adjustment of pilot protection band, electronic equipment, and storage medium.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] Firstly, a method for dynamically adjusting the pilot protection band is provided, including:

[0007] Transmit a channel measurement reference signal based on a time-delay-Doppler domain pilot structure, and obtain the channel measurement results corresponding to the channel measurement reference signal;

[0008] Obtain the time-varying parameter matrix constructed based on channel measurement results, and establish a time delay-Doppler domain resource grid mapping relationship based on the time-varying parameter matrix and the pre-stored multi-level pilot guard band configuration template to determine the first pilot guard band template and obtain the first pilot guard band;

[0009] The first pilot protection band is dynamically adjusted based on the channel environment to obtain the second pilot protection band, and the configuration index corresponding to the second pilot protection band is determined.

[0010] Secondly, a method for dynamically adjusting the pilot protection band is provided, applied to a base station, including:

[0011] Send a channel measurement reference signal based on a time-delay-Doppler domain pilot structure, receive the returned channel measurement results, and construct a time-varying parameter matrix based on the channel measurement results;

[0012] Based on the time-varying parameter matrix and the pre-stored multi-level pilot protection band configuration template, a time delay-Doppler domain resource grid mapping relationship is established to determine the first pilot protection band template and obtain the first pilot protection band;

[0013] The first pilot protection band is dynamically adjusted based on the channel environment to obtain the second pilot protection band, and the configuration index corresponding to the second pilot protection band is determined.

[0014] Thirdly, a method for dynamically adjusting the pilot protection band is provided, applied to a terminal, including:

[0015] A channel measurement reference signal based on a time-delay-Doppler domain pilot structure is transmitted, and a time-varying parameter matrix is ​​received, wherein the time-varying parameter matrix is ​​constructed based on the channel measurement results;

[0016] Based on the time-varying parameter matrix and the pre-stored multi-level pilot protection band configuration template, a time delay-Doppler domain resource grid mapping relationship is established to determine the first pilot protection band template and obtain the first pilot protection band;

[0017] The first pilot protection band is dynamically adjusted based on the channel environment to obtain the second pilot protection band, and the configuration index corresponding to the second pilot protection band is determined.

[0018] Fourthly, a pilot protection band dynamic adjustment system is provided, the pilot protection band dynamic adjustment system being used to perform the method described in any of the above-mentioned embodiments.

[0019] Fifthly, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in any of the preceding claims.

[0020] Sixthly, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the method described in any of the preceding claims.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention constructs a three-dimensional joint optimization model of time delay, Doppler, and channel environment. Utilizing a two-layer adaptive mechanism of joint mapping of time delay and Doppler parameters and dynamic adjustment of the channel environment, it effectively suppresses pilot pollution caused by asymmetric changes in time delay and Doppler, solves the multi-scale nonlinear adaptation problem of pilot guard bands in highly dynamic scenarios, and dynamically adjusts the pilot guard band configuration. This addresses pilot pollution caused by asymmetric changes in time delay and Doppler during satellite overflight, achieving intelligent optimization of the pilot guard band configuration. It can optimize the guard band range in real time based on channel quality, significantly improving the system's anti-interference capability and spectral efficiency. Furthermore, this invention can dynamically expand or shrink the guard band region according to channel environment fluctuations, enhancing anti-interference capability during channel degradation and rapidly releasing resources during channel recovery, balancing system robustness and spectral efficiency. It can also predict the risk of loss of synchronization based on template usage and initiate resynchronization. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a communication system provided for an exemplary embodiment of the present invention.

[0024] Figure 2 This is a flowchart of a pilot protection band dynamic adjustment method provided as an exemplary embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of a pilot symbol provided for an exemplary embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of another pilot symbol provided as an exemplary embodiment of the present invention.

[0027] Figure 5 A schematic diagram of a pilot protection band dynamic adjustment system provided as an exemplary embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of an electronic device shown in an example embodiment of the present invention. Detailed Implementation

[0029] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0030] Figure 1 This is a schematic diagram of a communication mechanism for dynamic adjustment of the pilot guard band, provided as an exemplary embodiment of the present invention. The method provided in this embodiment can initiate the path via a downlink originating from a base station or via an uplink originating from a terminal.

[0031] For ease of explanation, the following embodiments are combined with Figure 2The implementation path starting from the base station is described as an example; the implementation path starting from the terminal is similar.

[0032] Step s01: The base station sends downlink channel measurement reference signal through the downlink channel. After receiving the downlink channel measurement reference signal, the terminal completes the channel measurement and feeds back the original measurement report through the uplink channel.

[0033] Specifically, in the context of satellite-to-ground communication, the base station in this embodiment transmits a downlink channel measurement reference signal with a delay-Doppler domain (DD domain) pilot structure design via the downlink channel.

[0034] The core feature of the improved pilot structure in this embodiment of the invention is that one or more pilot symbols are inserted at a preset position in the time delay-Doppler domain (DD domain) grid, and a dynamically adjustable guard interval is set around them to form a pure measurement region isolated from the data region.

[0035] Figure 3 and Figure 4 The diagram shows two common pilot symbol placement methods. The pilot symbols in the diagram are known signals pre-inserted into the OTFS resource grid, and the guard interval is an empty symbol inserted into the OTFS resource grid, usually placed around the pilot symbols.

[0036] in, Figure 3 The diagram shows an impulse pilot diagram of a single pilot symbol, where the inverted symbol occupies a single grid point; Figure 4 The diagram shows a block pilot with multiple pilot symbols, where each pilot symbol occupies 3×2 grid points. It can be seen that, regardless of whether it is an impulse pilot or a block pilot, the adjacent grid points around the pilot symbol are set as zero-power guard intervals. Therefore, the improved pilot structure in this embodiment of the invention does not limit the number of pilot symbols.

[0037] The pilot structure can also be represented as pilot symbols occupying one or more grid points in the time-delay-Doppler domain (DD domain) {( The adjacent grid points around it are set as dynamically adjustable zero-power protection intervals.

[0038] Among them, l p Let l be the position coordinates in the Doppler dimension, corresponding to... Figure 3 and Figure 4 The horizontal axis dimension in k; p Let k be the position coordinates in the time delay dimension, and k corresponds to... Figure 3 and Figure 4 The vertical axis dimension.

[0039] The improved scheme in this embodiment allows the receiver to directly reflect the channel characteristics by detecting the offset of the pilot symbol in the time delay and Doppler dimensions, ensuring that the terminal can complete the channel parameter measurement under conditions without data interference.

[0040] After receiving the channel measurement reference signal at the terminal side, channel measurement needs to be performed. The channel measurement process includes:

[0041] S101 measures the strength of the received signal.

[0042] After performing a time-delay-Doppler domain (DD domain) transform on the received signal, the terminal calculates the strength of the received signal by detecting the instantaneous power of the pilot symbols. (r represents the receiver), which can be characterized by the following formula:

[0043] (1)

[0044] in To receive the signal at the pilot position The time delay-Doppler domain (DD domain) amplitude.

[0045] S102, perform time delay estimation on the pilot symbol to obtain the original time delay value.

[0046] The terminal detects the energy spread range of the pilot symbols in the time delay dimension and extracts the raw time delay value. The time delay dimension corresponds to the grid vertical coordinate index. .

[0047] Specifically, the original delay value Indexed by the reference delay offset of the pilot symbol With system latency resolution The product is determined as follows:

[0048] (2)

[0049] s103, perform Doppler frequency offset estimation on the pilot symbol to obtain the original Doppler frequency offset value.

[0050] In Doppler dimensions (corresponding to the horizontal coordinate index of the grid) Reference frequency offset index for detecting pilot symbols on the ) Combined with the system's Doppler resolution Calculate the original Doppler frequency offset :

[0051] (3)

[0052] In a preferred embodiment, the terminal carries the original measurement report containing the channel measurement results in the PUSCH or PUCCH and feeds back the original measurement report through the uplink channel.

[0053] In a preferred embodiment, the original measurement report includes at least the received signal strength, the original time delay value, and the original Doppler frequency offset value.

[0054] An example of the original measurement report is shown in Table 1 below.

[0055] Table 1. Original Measurement Report Data Configuration

[0056]

[0057] If the measurement data is directly measured by the base station in the implementation path originating from the terminal, then there is no need to provide feedback again.

[0058] In step s02, after receiving the original measurement report, the base station parses the feedback information from it, calculates the equivalent signal-to-noise ratio γ, the time delay value τ, and the Doppler frequency shift value ν, and constructs a time-varying parameter matrix. .

[0059] The time-varying parameter matrix Its dimension is [3×1], and it contains the following elements:

[0060] (4)

[0061] Specifically, the mapping relationship between the elements is as follows:

[0062] (1)=γ,

[0063] ,

[0064] .

[0065] The equivalent signal-to-noise ratio γ is calculated as follows:

[0066] The base station bases the signal strength reported by the terminal. Combined with the noise floor of local storage Including interference statistics, calculate the equivalent signal-to-noise ratio. :

[0067] (5)

[0068] in, The equivalent interference power includes at least neighboring cell interference, multi-user interference, and other comprehensive factors.

[0069] The delay normalization coefficient is obtained by normalizing the current channel's maximum delay spread dimension, and the corresponding calculation method is as follows:

[0070] (6)

[0071] in, The maximum delay of the current channel. For the current measurement delay spread, This represents the maximum historical statistical delay.

[0072] The Doppler normalization coefficients are obtained based on the maximum Doppler frequency offset normalization, and the corresponding calculation method is as follows:

[0073] (7)

[0074] in, The maximum relative speed supported by the system. denoted as carrier frequency, and c as the speed of light.

[0075] Formulas (6) and (7) map link quality to dimensionless scalar indices through normalization, reflecting the essential characteristics of channel conditions.

[0076] After determining and calculating the above indicators, the time-varying parameter matrix is ​​constructed as follows:

[0077] (8).

[0078] In one embodiment, after receiving the channel measurement results, the base station calculates the time-varying parameters to obtain a time-varying parameter matrix constructed based on the channel measurement results. In another embodiment, along the path from the terminal, the base station sends the constructed time-varying parameter matrix to the terminal via the downlink channel, thereby enabling the terminal to obtain the time-varying parameter matrix constructed based on the channel measurement results. In yet another embodiment, the location for calculating the time-varying parameter matrix may not be specifically limited, as long as the time-varying parameter matrix constructed based on the channel measurement results can be obtained and subsequent steps can be performed.

[0079] Step s03: Based on the time-varying parameter matrix and the pre-stored multi-level pilot protection band configuration template, establish the delay-Doppler domain resource grid mapping relationship, determine the basic configuration of the pilot protection band, and use the best matching protection band template as the first pilot protection band template to obtain the corresponding first pilot protection band.

[0080] In this embodiment of the invention, the base station and / or terminal will pre-store multi-level (M-level in one embodiment) pilot guard band templates. Each template is defined as a set of guard region parameters in the delay-Doppler domain (DD domain):

[0081] (9)

[0082] in, To protect the number of resource grids in the latency dimension, T represents the number of resource grids in the Doppler protection zone. i This represents the set of protection zone resource grids traversed in the time-delay-Doppler domain (DD domain), determined by the number of protection zone resource grids in the time-delay dimension and the number of protection zone resource grids in the Doppler dimension. This is the traversal range.

[0083] As a preferred embodiment, the pre-stored multi-level pilot protection band configuration template is shown in Table 2 below.

[0084] Table 2 Example of Pilot Protection Band Configuration Template

[0085]

[0086] The pilot protection band configuration template designed in this embodiment of the invention includes multiple levels M. The value range of level M can be specifically set according to the specific needs of the scenario. The template level can continue to be extended downwards, but it shall not exceed the resource grid boundary.

[0087] Subsequently, the base station receives and processes the time-varying parameter matrix. Calculate the resource grid offset of the pilot symbol in the delay-Doppler domain (DD domain), i.e., the pilot offset.

[0088] In a preferred embodiment, the pilot offset is calculated based on a normalized parameter matrix. Calculate the dynamic pilot offset of the pilot symbol in the time-delay-Doppler domain (DD domain), including:

[0089] (1) Delay dimension resource grid offset :

[0090] (10)

[0091] K represents the total number of resource grids in the latency dimension.

[0092] (2) Doppler dimension resource grid offset :

[0093] (11)

[0094] Where L represents the total number of resource grids in the Doppler dimension.

[0095] If the calculated value exceeds the grid range (e.g.) If the value is >K, then the offset will be truncated to the maximum value.

[0096] Then, based on the calculated pilot offset, the best pilot protection band template is selected and matched from the pre-prepared multi-level pilot protection band configuration templates, and used as the first pilot protection band template.

[0097] In a preferred embodiment, when selecting the guard band configuration template based on the pilot offset, a time delay dimension priority strategy is adopted. That is, the time delay dimension in the pre-stored multi-level pilot guard band configuration template is considered first, and then the Doppler dimension of the multi-level pilot guard band configuration template is determined to select the template sequence.

[0098] In a preferred embodiment, the pilot guard band configuration template is used as follows:

[0099] First, determine the calculated latency dimension resource grid offset. By comparing the column containing "Delay Dimension Resource Grid Offset (per Delay Grid)" in the protection strip configuration template table, find the matching template sequences.

[0100] Secondly, examine the calculated Doppler dimension offset. In the templates after the first matching, select the most suitable one from the column of "Doppler dimension resource grid offset (per Doppler grid)" in the protection strip configuration template table.

[0101] Then, the template corresponding to the template sequence index m in the first column of the table is recorded as the best pilot guard band template. The number of delay grids (second column) and the number of Doppler grids (third column) corresponding to the mth sequence index in the table are the delay grid width and Doppler grid width corresponding to the best pilot guard band template.

[0102] Furthermore, the template sequence index m can be determined based on the currently measured time delay spread value τ and Doppler frequency offset value ν, as well as the calculated time delay dimension resource grid offset. and Doppler dimension offset From the pre-stored pilot protection band configuration templates, select the template with the smallest m value among all protection band configurations that simultaneously meet the following conditions as the optimal pilot protection band template for matching:

[0103] (12)

[0104] The latency is the latency value corresponding to a single resource grid in the latency dimension; This represents the frequency offset of a single resource grid in the Doppler dimension.

[0105] If the current delay spread value τ and Doppler frequency offset value ν exceed the coverage range of all templates, the maximum guard band template is selected, and an early warning signal is triggered, indicating a risk of loss of synchronization. Upon receiving the early warning signal, the base station / terminal executes an emergency time-frequency synchronization procedure in the next frame to compensate for the correct frequency offset for Doppler estimation.

[0106] Step s04: Based on the channel environment, the base station executes the adaptive optimization mechanism for the protection band, dynamically adjusts the protection band range, obtains the second pilot protection band, and determines the final configuration index corresponding to the second protection band.

[0107] In a preferred embodiment, the channel environment is primarily the signal-to-noise ratio (SNR). That is, the base station executes an adaptive guard band optimization mechanism based on changes in the SNR, and dynamically adjusts the guard band range. This dynamic adjustment includes either expansion or reduction.

[0108] In a preferred embodiment, the guard band adaptive optimization mechanism is implemented based on an SNR degradation gradient model. When SNR degradation or improvement is detected, the guard band region is nonlinearly expanded or reduced according to a preset degradation gradient model. The expansion or reduction level is positively correlated with the degree of deviation of the current SNR value from the historical best value, resulting in a second pilot guard band after expansion or reduction, and a corresponding guard band region range. The base station then distributes the final configuration index to the terminal via the downlink channel.

[0109] As a preferred embodiment, the dynamic detection of SNR and maintenance of historical benchmarks include two cases: low SNR environment and high SNR environment.

[0110] In low SNR environments, noise and interference exacerbate the contamination of pilot symbols, often accompanied by increased channel delay spread and Doppler frequency offset. In this case, the extended guard band can isolate the mutual interference between data symbols and pilots, improving the purity of the pilot region and ensuring channel estimation accuracy; it can also accommodate larger delay-Doppler offsets, preventing pilot energy leakage into the data region and causing inter-symbol and inter-carrier interference.

[0111] In high SNR environments, stable channel conditions are often present. In such cases, delay spread and Doppler frequency offset may be overestimated, requiring a conservative design in step s03. At this point, secondary optimization based on SNR can eliminate redundancy and achieve refined configuration.

[0112] The base station / terminal continuously monitors the downlink signal-to-noise ratio γ(t) and dynamically maintains the historical best SNR value. :

[0113] (13)

[0114] Degradation gradient calculation defines the degree of SNR degradation as the relative deviation between the current value and the historical best value:

[0115] (14)

[0116] Simultaneously calculate the temporal gradient of the degradation rate:

[0117] (15)

[0118] in, The sampling interval is denoted as .

[0119] In another preferred embodiment, the guard band extension decision is an internal implementation scheme, one embodiment of which is a guard band extension decision based on a neural network.

[0120] Specifically, the input parameters for the neural network are set as follows:

[0121] (16)

[0122] Where γ(t) is the current signal-to-noise ratio; , used to characterize the degree of SNR degradation; Represents the instantaneous rate of change of SNR; This indicates the best SNR in history.

[0123] right Perform decay update:

[0124] (17)

[0125] Output parameters:

[0126] (18)

[0127] To protect the number of grids that are expanded or reduced.

[0128] In a preferred embodiment, considering resource grid limitations, the range of the number of grids n that can be expanded or reduced can be set to -1 to 3.

[0129] The output layer of the neural network uses a sigmoid function with linear scaling to map to a preset range of grid cells. Optimal guardrail labels are generated through link simulation for training.

[0130] The loss function uses weighted Huber loss to balance the sensitivity to large and small errors.

[0131] (19)

[0132] Record the number of grids n that the guard band expands or shrinks, which is used to generate the final index configuration. When configuring the guard band, the guard band template determined in the previous step is used as a basis, and it is expanded or shrunk by n grids in both the time delay dimension and the Doppler dimension. If it exceeds the resource grid boundary, it is truncated to the maximum value, thus completing the dynamic adjustment and configuration decision of the guard band size.

[0133] The degradation gradient model and neural network described above are two model examples used to implement the guard band adaptive optimization mechanism in the embodiments of the present invention. The embodiments of the present invention do not impose specific restrictions on which model is used to complete the guard band adaptive optimization mechanism.

[0134] After the protection band extension decision is completed, the configuration index is encapsulated and distributed. This is mainly done by generating the final configuration index I(t), which must contain at least the protection band template identifier and the protection band dynamic adjustment parameters.

[0135] In a preferred embodiment, the final configuration index I(t) is obtained by combining the guard band template index identifier m and the guard band dynamic adjustment index parameter n to obtain a multi-bit sequence, wherein the low-order bits store the guard band dynamic adjustment index parameter n, the high-order bits store the guard band template index identifier m, and the sequence is sent to the terminal (base station) through the downlink channel (uplink channel).

[0136] Corresponding to the aforementioned embodiments of the pilot protection band dynamic adjustment method, the present invention also provides embodiments of the pilot protection band dynamic adjustment system.

[0137] Figure 5 This is a schematic diagram of a pilot protection band dynamic adjustment system provided as an exemplary embodiment of the present invention. The pilot protection band dynamic adjustment system is used to execute the dynamic adjustment method described in any of the foregoing embodiments.

[0138] Specifically, the pilot protection band dynamic adjustment system includes:

[0139] The time-varying parameter acquisition module 51 is used to send a channel measurement reference signal based on the time-delay-Doppler domain pilot structure, acquire the corresponding channel measurement results, and acquire the time-varying parameter matrix constructed based on the channel measurement results;

[0140] The first protection band determination module 52 is used to establish a time delay-Doppler domain resource grid mapping relationship based on the time-varying parameter matrix and the pre-stored multi-level pilot protection band configuration template, determine the first pilot protection band template, and obtain the first pilot protection band.

[0141] The second protection band determination module 53 is used to dynamically adjust the first pilot protection band based on the channel environment to obtain the second pilot protection band and determine the configuration index corresponding to the second pilot protection band.

[0142] In a preferred embodiment, the present invention is further specified as a pilot guard band dynamic adjustment system implemented in a base station, the system comprising:

[0143] The time-varying parameter acquisition module 51 is used to send a channel measurement reference signal based on the time-delay-Doppler domain pilot structure, receive the returned channel measurement results, and construct a time-varying parameter matrix based on the channel measurement results;

[0144] The first protection band determination module 52 is used to establish a time delay-Doppler domain resource grid mapping relationship based on the time-varying parameter matrix and the pre-stored multi-level pilot protection band configuration template, determine the first pilot protection band template, and obtain the first pilot protection band.

[0145] The second protection band determination module 53 is used to dynamically adjust the first pilot protection band based on the channel environment to obtain the second pilot protection band and determine the configuration index corresponding to the second pilot protection band.

[0146] In another preferred embodiment, the present invention is further specified as a pilot protection band dynamic adjustment system implemented in a terminal, the system comprising:

[0147] The time-varying parameter acquisition module 51 is used to send a channel measurement reference signal based on a time-delay-Doppler domain pilot structure and receive a time-varying parameter matrix, wherein the time-varying parameter matrix is ​​constructed based on the channel measurement results;

[0148] The first protection band determination module 52 is used to establish a time delay-Doppler domain resource grid mapping relationship based on the time-varying parameter matrix and the pre-stored multi-level pilot protection band configuration template, determine the first pilot protection band template, and obtain the first pilot protection band.

[0149] The second protection band determination module 53 is used to dynamically adjust the first pilot protection band based on the channel environment to obtain the second pilot protection band and determine the configuration index corresponding to the second pilot protection band.

[0150] For the system embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The system embodiments described above are merely illustrative, and the modules described as separate modules may or may not be physically separate. Some or all of the modules can be selected according to actual needs to achieve the purpose of the present invention. Those skilled in the art can understand and implement this without creative effort.

[0151] Figure 6 This is a schematic diagram of the structure of a corresponding electronic device 60 shown in another embodiment of the present invention. Figure 6The electronic device 60 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0152] like Figure 6 As shown, electronic device 60 can be represented as a general-purpose computing device, such as a server device. Components of electronic device 60 may include, but are not limited to: at least one processor 61, at least one memory 62, and a bus 63 connecting different system components (including memory 62 and processor 61). Bus 63 includes a data bus, an address bus, and a control bus.

[0153] The memory 62 may include volatile memory, such as random access memory (RAM) 621 and / or cache memory 622, and may further include read-only memory (ROM) 623.

[0154] The memory 62 may also include a program tool 625 having at least one program module 624, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0155] The processor 61 performs various functional applications and data processing, such as the methods provided in any of the above embodiments, by running computer programs stored in the memory 62.

[0156] Electronic device 60 can also communicate with one or more external devices 64 (e.g., a keyboard). This communication can be performed via input / output (I / O) interface 65. The electronic device 60 corresponding to the model can also communicate with one or more networks via network adapter 66. As shown, network adapter 66 communicates with other modules of the model-generated electronic device 60 via bus 63. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the model-generated electronic device 60, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0157] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0158] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the method provided in any of the above embodiments.

[0159] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for dynamically adjusting the pilot protection band, characterized in that, include: Send a channel measurement reference signal based on a time-delay-Doppler domain pilot structure and obtain the corresponding channel measurement results; Obtain the time-varying parameter matrix constructed based on channel measurement results, and establish a time delay-Doppler domain resource grid mapping relationship based on the time-varying parameter matrix and the pre-stored multi-level pilot guard band configuration template to determine the first pilot guard band template and obtain the first pilot guard band; The time-varying parameter matrix includes: equivalent signal-to-noise ratio, time delay normalization coefficient, and Doppler normalization coefficient; the pre-stored multi-level pilot protection band configuration template is a set of protection region parameters in the time delay-Doppler domain; Construct a joint feature space of time delay-Doppler-channel environment; adaptively and dynamically adjust the area range of the first pilot protection band according to the changes in the channel environment to obtain the second pilot protection band, wherein the dynamic adjustment includes expansion or reduction; determine the area range of the second pilot protection band corresponding to the second pilot protection band, form a configuration index corresponding to the area range of the second pilot protection band, and complete the dynamic adjustment decision of the pilot protection band.

2. The method for dynamically adjusting the pilot protection band according to claim 1, characterized in that, The time-delay-Doppler domain pilot structure includes: inserting one or more pilot symbols at preset positions in the time-delay-Doppler domain grid, and setting a dynamically adjustable zero-power protection interval around the pilot symbols.

3. The method for dynamically adjusting the pilot protection band according to claim 1, characterized in that, Channel measurement results include at least the received signal strength and pilot symbol parameters.

4. The method for dynamically adjusting the pilot protection band according to claim 1 or 3, characterized in that, The acquisition of channel measurement results includes: The received signal is subjected to a time-delay-Doppler domain transform, and the instantaneous power of the pilot symbol is detected to calculate the received signal strength. The time delay of the pilot symbol is estimated to obtain the original time delay value. The Doppler frequency offset of the pilot symbol is estimated to obtain the original Doppler frequency offset value.

5. The method for dynamically adjusting the pilot protection band according to claim 1, characterized in that, The equivalent signal-to-noise ratio is calculated based on the received signal strength, noise floor, and interference statistics; the time delay normalization coefficient is obtained by normalizing the current channel's maximum time delay spread dimension; and the Doppler normalization coefficient is obtained by normalizing the maximum Doppler frequency offset.

6. The method for dynamically adjusting the pilot protection band according to claim 1, characterized in that, The set of protected area parameters is a set of protected zone resource grid traversals determined by the time-delay dimension protected zone resource grid and the Doppler dimension protected zone resource grid.

7. The method for dynamically adjusting the pilot protection band according to claim 1, characterized in that, Based on the time-varying parameter matrix and the pre-stored multi-level pilot guard band configuration template, a time-delay-Doppler domain resource grid mapping relationship is established to determine the first pilot guard band template, thus obtaining the first pilot guard band, including: Calculate the dynamic pilot offset of the pilot symbol in the time-delay-Doppler domain based on the time-varying parameter matrix; Based on the calculated pilot offset combined with the currently measured time delay spread and Doppler frequency offset, the first pilot protection band template is selected from the pre-stored multi-level pilot protection band configuration templates; The time delay grid number and Doppler grid number corresponding to the first pilot guard band template are determined to obtain the first pilot guard band and the corresponding first pilot guard band region range.

8. The pilot protection band dynamic adjustment method according to claim 1 or 7, characterized in that, If the currently measured delay spread and Doppler frequency offset values ​​exceed the coverage range of all templates in the pre-stored multi-level pilot protection band configuration templates, select the largest protection band template as the first pilot protection band template, and trigger an early warning signal and / or execute an emergency time-frequency synchronization procedure to compensate for the correct frequency offset.

9. The method for dynamically adjusting the pilot protection band according to claim 1, characterized in that, The dynamic pilot offset includes resource grid offsets in both the time delay dimension and the Doppler dimension.

10. The method for dynamically adjusting the pilot protection band according to claim 1, characterized in that, The channel environment refers to the channel signal-to-noise ratio (SNR).

11. The method for dynamically adjusting the pilot protection band according to claim 1, characterized in that, The configuration index includes at least the first pilot protection band template and dynamic adjustment parameters.

12. The method for dynamically adjusting the pilot protection band according to claim 11, characterized in that, The dynamic adjustment parameters are parameters that expand or reduce the range of the first pilot protection band.

13. A method for dynamically adjusting the pilot protection band, applied to a base station, characterized in that, include: Send a channel measurement reference signal based on a time-delay-Doppler domain pilot structure, receive the returned channel measurement results, and construct a time-varying parameter matrix based on the channel measurement results; Based on the time-varying parameter matrix and the pre-stored multi-level pilot protection band configuration template, a time delay-Doppler domain resource grid mapping relationship is established to determine the first pilot protection band template and obtain the first pilot protection band; The time-varying parameter matrix includes: equivalent signal-to-noise ratio, time delay normalization coefficient, and Doppler normalization coefficient; the pre-stored multi-level pilot protection band configuration template is a set of protection region parameters in the time delay-Doppler domain; Construct a joint feature space of time delay-Doppler-channel environment; adaptively and dynamically adjust the area range of the first pilot protection band according to the changes in the channel environment to obtain the second pilot protection band, wherein the dynamic adjustment includes expansion or reduction; determine the area range of the second pilot protection band corresponding to the second pilot protection band, form a configuration index corresponding to the area range of the second pilot protection band, and complete the dynamic adjustment decision of the pilot protection band.

14. A method for dynamically adjusting the pilot protection band, applied to a terminal, characterized in that, include: A channel measurement reference signal based on a time-delay-Doppler domain pilot structure is transmitted, and a time-varying parameter matrix is ​​received, wherein the time-varying parameter matrix is ​​constructed based on the channel measurement results; Based on the time-varying parameter matrix and the pre-stored multi-level pilot protection band configuration template, a time delay-Doppler domain resource grid mapping relationship is established to determine the first pilot protection band template and obtain the first pilot protection band; The time-varying parameter matrix includes: equivalent signal-to-noise ratio, time delay normalization coefficient, and Doppler normalization coefficient; the pre-stored multi-level pilot protection band configuration template is a set of protection region parameters in the time delay-Doppler domain; Construct a joint feature space of time delay-Doppler-channel environment; adaptively and dynamically adjust the area range of the first pilot protection band according to the changes in the channel environment to obtain the second pilot protection band, wherein the dynamic adjustment includes expansion or reduction; determine the area range of the second pilot protection band corresponding to the second pilot protection band, form a configuration index corresponding to the area range of the second pilot protection band, and complete the dynamic adjustment decision of the pilot protection band.

15. A pilot protection band dynamic adjustment system, characterized in that, The pilot protection band dynamic adjustment system is used to perform the method described in any one of claims 1-14.

16. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 14.

17. 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 of any one of claims 1 to 14.

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