CN114786251A - 5G cell synchronization method, device, electronic equipment and storage medium - Google Patents
5G cell synchronization method, device, electronic equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the application provides a 5G cell synchronization method, a device, an electronic device and a storage medium, wherein the method comprises the following steps: acquiring physical broadcast channel information of a main cell in a 5G cell; analyzing the physical broadcast channel information of the main cell to generate a broadcast channel demodulation reference sequence of the main cell; acquiring a frequency domain channel estimation value of the main cell according to the broadcast channel demodulation reference sequence of the main cell; obtaining a time domain deviation value of the main cell according to the frequency domain channel estimation value of the main cell; acquiring a time domain offset value of at least one auxiliary cell in the 5G cells; obtaining a time domain deviation between the time domain offset value of the primary cell and the time domain offset value of the at least one secondary cell; and synchronizing the primary cell and the at least one secondary cell according to the time domain deviation. By implementing the embodiment of the application, the communication between the 5G cell and the terminal can be realized, the use of radio frequency equipment is reduced, and the cost is reduced.
Description
Technical Field
The application relates to the technical field of unmanned aerial vehicle route planning, in particular to a 5G cell synchronization method, a device, electronic equipment and a computer readable storage medium.
Background
The 5G cell synchronization is a method for synchronizing multiple cells on the basis of a single cell and synchronizing secondary cells (second and more cells) through time domain data of a primary cell (a synchronized first cell), so that the load of radio frequency equipment can be reduced, and downlink synchronization of a terminal and the cells is realized.
However, in the prior art, when the 5G cell synchronization is implemented, a plurality of radio frequency devices are required, and usually only one cell synchronization can be implemented, which is time-consuming and labor-consuming, and causes a load of the radio frequency devices to be greatly increased, thereby increasing the cost.
Disclosure of Invention
An object of the embodiments of the present application is to provide a 5G cell synchronization method, apparatus, electronic device, and computer-readable storage medium, which can implement communication between a 5G cell and a terminal, reduce the use of radio frequency devices, and reduce cost.
In a first aspect, an embodiment of the present application provides a 5G cell synchronization method, where the method includes:
acquiring physical broadcast channel information of a main cell in a 5G cell;
analyzing the physical broadcast channel information of the main cell to generate a broadcast channel demodulation reference sequence of the main cell;
obtaining a frequency domain channel estimation value of the main cell according to the broadcast channel demodulation reference sequence of the main cell;
obtaining a time domain deviation value of the main cell according to the frequency domain channel estimation value of the main cell;
acquiring a time domain offset value of at least one auxiliary cell in the 5G cells;
obtaining a time domain deviation between the time domain offset value of the primary cell and the time domain offset value of the at least one secondary cell;
and synchronizing the primary cell and the at least one secondary cell according to the time domain deviation.
In the implementation process, the 5G cell synchronization is implemented by analyzing the physical broadcast channel information of the main cell and the physical broadcast channel information of the auxiliary cell in the 5G cell to obtain the time domain deviation, so that the communication between the 5G cell and the terminal can be implemented, the load of the radio frequency equipment is reduced, and the cost is saved.
Further, the step of obtaining the frequency domain channel estimation value of the primary cell according to the broadcast channel demodulation reference sequence of the primary cell includes:
acquiring a broadcast channel demodulation reference signal in the physical broadcast channel information of the main cell;
and carrying out filtering interpolation processing on the broadcast channel demodulation reference signal of the main cell and the broadcast channel demodulation reference signal sequence of the main cell to obtain a frequency domain channel estimation value of the main cell.
In the implementation process, the frequency domain channel estimation value of the main cell is obtained by using a filtering interpolation processing mode, so that the error in the calculation process can be reduced, and the accuracy of the frequency domain channel estimation value of the main cell is improved.
Further, the step of obtaining the time domain offset value of the primary cell according to the frequency domain channel estimation value of the primary cell includes:
performing inverse discrete Fourier transform on the frequency domain channel estimation value of the main cell to obtain a time domain channel estimation value of the main cell;
acquiring a maximum index of the time domain channel estimation value of the main cell;
and determining the maximum index as a time domain offset value of the primary cell.
In the implementation process, the time domain deviant with the maximum value index as the main cell is determined, so that the precision of the time domain deviant is higher, the calculation efficiency can be improved, and the calculation space can be saved.
Further, the step of obtaining the time domain offset value of at least one secondary cell in the 5G cell includes:
acquiring physical broadcast channel information of at least one auxiliary cell in the 5G cell;
analyzing the physical broadcast channel information of the at least one auxiliary cell to generate a broadcast channel demodulation reference signal sequence of the at least one auxiliary cell;
filtering and interpolating the broadcast channel demodulation reference signal sequence of the at least one auxiliary cell to obtain a frequency domain channel estimation value of the at least one auxiliary cell;
and obtaining a time domain offset value of the at least one secondary cell according to the frequency domain channel estimation value of the at least one secondary cell.
In the implementation process, the frequency domain channel estimation value of the at least one auxiliary cell is obtained in the same way, so that the accuracy of the time domain deviation value of the at least one auxiliary cell is more consistent with that of the main cell, and the accuracy of the subsequent time domain deviation can be effectively improved.
In a second aspect, an embodiment of the present application further provides a 5G cell synchronization apparatus, where the apparatus includes:
an obtaining module, configured to obtain physical broadcast channel information of a primary cell in a 5G cell; the time domain offset value of at least one auxiliary cell in the 5G cell is also acquired;
the analysis module is used for analyzing the physical broadcast channel information of the main cell and generating a broadcast channel demodulation reference sequence of the main cell;
a frequency domain channel estimation value obtaining module, configured to obtain a frequency domain channel estimation value of the primary cell according to the broadcast channel demodulation reference sequence of the primary cell;
a time domain offset value obtaining module, configured to obtain a time domain offset value of the primary cell according to the frequency domain channel estimation value of the primary cell;
a time domain offset difference obtaining module, configured to obtain a time domain offset between the time domain offset value of the primary cell and the time domain offset value of the at least one secondary cell;
and the synchronization module is used for synchronizing the primary cell and the at least one secondary cell according to the time domain deviation.
In the implementation process, the 5G cell synchronization is implemented by analyzing the physical broadcast channel information of the main cell and the physical broadcast channel information of the auxiliary cell in the 5G cell to obtain the time domain deviation, so that the communication between the 5G cell and the terminal can be implemented, the load of the radio frequency equipment is reduced, and the cost is saved.
Further, the frequency domain channel estimation value obtaining module is further configured to:
acquiring a broadcast channel demodulation reference signal in the physical broadcast channel information of the main cell;
and carrying out filtering interpolation processing on the broadcast channel demodulation reference signal of the main cell and the broadcast channel demodulation reference signal sequence of the main cell to obtain a frequency domain channel estimation value of the main cell.
In the implementation process, the frequency domain channel estimation value of the main cell is obtained by using a filtering interpolation processing mode, so that the error in the calculation process can be reduced, and the accuracy of the frequency domain channel estimation value of the main cell is improved.
Further, the time domain offset value obtaining module is further configured to:
performing inverse discrete Fourier transform on the frequency domain channel estimation value of the main cell to obtain a time domain channel estimation value of the main cell;
acquiring a maximum index of the time domain channel estimation value of the main cell;
and determining the maximum index as a time domain offset value of the primary cell.
In the implementation process, the time domain offset value with the maximum value index as the main cell is determined, so that the accuracy of the time domain offset value is higher, the calculation efficiency is improved, and the calculation space is saved.
Further, the time domain offset difference obtaining module is further configured to:
acquiring physical broadcast channel information of at least one auxiliary cell in the 5G cell;
analyzing the physical broadcast channel information of the at least one auxiliary cell to generate a broadcast channel demodulation reference signal sequence of the at least one auxiliary cell;
filtering and interpolating the broadcast channel demodulation reference signal sequence of the at least one auxiliary cell to obtain a frequency domain channel estimation value of the at least one auxiliary cell;
and obtaining the time domain deviation value of the at least one secondary cell according to the frequency domain channel estimation value of the at least one secondary cell.
In the implementation process, the frequency domain channel estimation value of the at least one auxiliary cell is obtained in the same way, so that the accuracy of the time domain deviation value of the at least one auxiliary cell can better accord with that of the main cell, and the accuracy of the subsequent time domain deviation can be effectively improved.
In a third aspect, an embodiment of the present application provides an electronic device, including: memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any of the first aspect when executing the computer program.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having instructions stored thereon, which, when executed on a computer, cause the computer to perform the method according to any one of the first aspect.
In a fifth aspect, embodiments of the present application provide a computer program product, which when run on a computer, causes the computer to perform the method according to any one of the first aspect.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
The present invention can be implemented in accordance with the teachings of the specification, which is to be read in conjunction with the following detailed description of the presently preferred embodiments of the invention.
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To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flowchart of a 5G cell synchronization method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a 5G cell synchronization apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic structural component diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The following detailed description of the present application will be made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
Example one
Fig. 1 is a schematic flowchart of a 5G cell synchronization method provided in an embodiment of the present application, and as shown in fig. 1, the method includes:
s1, acquiring the physical broadcast channel information of the main cell in the 5G cell;
s2, analyzing the physical broadcast channel information of the main cell to generate a broadcast channel demodulation reference sequence of the main cell;
s3, obtaining the frequency domain channel estimation value of the main cell according to the broadcast channel demodulation reference sequence of the main cell;
s4, obtaining the time domain deviant of the main cell according to the frequency domain channel estimation value of the main cell;
s5, acquiring a time domain offset value of at least one auxiliary cell in the 5G cells;
s6, obtaining the time domain deviation between the time domain deviation value of the main cell and the time domain deviation value of at least one auxiliary cell;
and S7, synchronizing the primary cell and the at least one secondary cell according to the time domain deviation.
In the implementation process, the 5G cell synchronization is implemented by analyzing the physical broadcast channel information of the main cell and the physical broadcast channel information of the auxiliary cell in the 5G cell to obtain the time domain deviation, so that the communication between the 5G cell and the terminal can be implemented, the load of the radio frequency equipment is reduced, and the cost is saved.
5G defines 1008 physical cell IDs, and the value range is 0-1007, in the embodiment of the present application, multiple cells are synchronized on the basis of a single cell, and the time domain offset value of a secondary cell (a second and more cells) is synchronized by the time domain offset value of a primary cell (a synchronized first cell), so that the radio frequency load can be reduced.
The 5G cell Synchronization can realize downlink Synchronization between a terminal and a cell, and on this basis, other cells are searched at possible SSB positions, and a Physical Cell (PCI) ID is determined according to a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), a Broadcast Channel (PBCH) sequence is generated, a PBCH frequency domain correlation operation is performed, and frequency domain correlation values of PBCH and PBCH are analyzed.
In S2, a Broadcast Channel Demodulation Reference Signals (PBCH DMRS) sequence is generated.
Further, S3 includes:
acquiring a broadcast channel demodulation reference signal in physical broadcast channel information of a main cell;
and carrying out filtering interpolation processing on the broadcast channel demodulation reference signal of the main cell and the broadcast channel demodulation reference signal sequence of the main cell to obtain a frequency domain channel estimation value of the main cell.
In the implementation process, the frequency domain channel estimation value of the main cell is obtained by using a filtering interpolation processing mode, so that the error in the calculation process can be reduced, and the accuracy of the frequency domain channel estimation value of the main cell is improved.
The Broadcast Channel demodulation reference signal sequence of the primary cell and the received Broadcast Channel (PBCH) demodulation reference signal are correlated, and optionally, in this embodiment, filtering interpolation processing is adopted to obtain a frequency domain Channel estimation value of the primary cell.
Further, S4 includes:
performing inverse discrete Fourier transform on the frequency domain channel estimation value of the main cell to obtain a time domain channel estimation value of the main cell;
acquiring a maximum index of a time domain channel estimation value of a main cell;
and determining the maximum value index as the time domain offset value of the main cell.
In the implementation process, the time domain offset value with the maximum value index as the main cell is determined, so that the accuracy of the time domain offset value is higher, the calculation efficiency is improved, and the calculation space is saved.
And obtaining a time domain channel estimation value of the primary cell by Inverse Discrete Fourier Transform (IDFT), taking the position of the maximum power value as a time domain synchronization point, namely determining a time domain offset value with the maximum index as the primary cell, and then subtracting the time domain offset value of the secondary cell to obtain the time domain deviation of the secondary cell relative to the primary cell.
The time domain channel estimation value is indexed by the maximum power value and is the time domain deviation value T of the main cell, and the power calculation mode adopts the mode of calculating the modular square value of the time domain channel estimation value to calculate, so that the error can be reduced to the maximum extent.
Further, S5 includes:
acquiring physical broadcast channel information of at least one auxiliary cell in the 5G cell;
analyzing the physical broadcast channel information of at least one auxiliary cell to generate a broadcast channel demodulation reference signal sequence of at least one auxiliary cell;
carrying out filtering interpolation processing on the broadcast channel demodulation reference signal sequence of at least one auxiliary cell to obtain a frequency domain channel estimation value of at least one auxiliary cell;
and obtaining the time domain offset value of at least one secondary cell according to the frequency domain channel estimation value of at least one secondary cell.
In the implementation process, the frequency domain channel estimation value of the at least one auxiliary cell is obtained in the same way, so that the accuracy of the time domain deviation value of the at least one auxiliary cell can better accord with that of the main cell, and the accuracy of the subsequent time domain deviation can be effectively improved.
In the embodiment of the application, each auxiliary cell obtains the time domain deviation value by adopting the same method as the main cell, so that the use of radio frequency equipment can be reduced, and the radio frequency load is effectively reduced.
Example two
In order to implement a corresponding method of the above embodiment to achieve corresponding functions and technical effects, the following provides a 5G cell synchronization apparatus, as shown in fig. 2, the apparatus including:
an obtaining module 1, configured to obtain physical broadcast channel information of a primary cell in a 5G cell; the time domain offset value of at least one auxiliary cell in the 5G cell is also acquired;
the analysis module 2 is used for analyzing the physical broadcast channel information of the main cell and generating a broadcast channel demodulation reference sequence of the main cell;
a frequency domain channel estimation value obtaining module 3, configured to obtain a frequency domain channel estimation value of the primary cell according to the broadcast channel demodulation reference sequence of the primary cell;
a time domain offset value obtaining module 4, configured to obtain a time domain offset value of the primary cell according to the frequency domain channel estimation value of the primary cell;
a time domain offset difference obtaining module 5, configured to obtain a time domain offset between a time domain offset value of the primary cell and a time domain offset value of the at least one secondary cell;
and the synchronization module 6 is configured to synchronize the primary cell and the at least one secondary cell according to the time domain deviation.
In the implementation process, the synchronization of the 5G cells is realized by analyzing the physical broadcast channel information of the primary cell and the physical broadcast channel information of the secondary cell in the 5G cells to obtain the time domain deviation, so that the communication between the 5G cells and the terminal can be realized, the load of radio frequency equipment is reduced, and the cost is saved.
Further, the frequency domain channel estimation value obtaining module 3 is further configured to:
acquiring a broadcast channel demodulation reference signal in the physical broadcast channel information of a main cell;
and carrying out filtering interpolation processing on the broadcast channel demodulation reference signal of the main cell and the broadcast channel demodulation reference signal sequence of the main cell to obtain a frequency domain channel estimation value of the main cell.
In the implementation process, the frequency domain channel estimation value of the main cell is obtained by using a filtering interpolation processing mode, so that the error in the calculation process can be reduced, and the accuracy of the frequency domain channel estimation value of the main cell is improved.
Further, the time domain offset value obtaining module 4 is further configured to:
performing inverse discrete Fourier transform on the frequency domain channel estimation value of the main cell to obtain a time domain channel estimation value of the main cell;
acquiring a maximum value index of a time domain channel estimation value of a main cell;
and determining the maximum value index as the time domain offset value of the main cell.
In the implementation process, the time domain deviant with the maximum value index as the main cell is determined, so that the precision of the time domain deviant is higher, the calculation efficiency can be improved, and the calculation space can be saved.
Further, the time domain offset difference obtaining module 5 is further configured to:
acquiring physical broadcast channel information of at least one auxiliary cell in the 5G cell;
analyzing the physical broadcast channel information of at least one auxiliary cell to generate a broadcast channel demodulation reference signal sequence of at least one auxiliary cell;
carrying out filtering interpolation processing on the broadcast channel demodulation reference signal sequence of at least one auxiliary cell to obtain a frequency domain channel estimation value of at least one auxiliary cell;
and obtaining the time domain deviation value of at least one secondary cell according to the frequency domain channel estimation value of at least one secondary cell.
In the implementation process, the frequency domain channel estimation value of the at least one auxiliary cell is obtained in the same way, so that the accuracy of the time domain deviation value of the at least one auxiliary cell is more consistent with that of the main cell, and the accuracy of the subsequent time domain deviation can be effectively improved.
The 5G cell synchronization apparatus can implement the method of the first embodiment. The options in the first embodiment above are also applicable to the present embodiment, and are not described in detail here.
The rest of the embodiments of the present application may refer to the contents of the first embodiment, and in this embodiment, details are not repeated.
EXAMPLE III
An embodiment of the present application provides an electronic device, which includes a memory and a processor, where the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the 5G cell synchronization method according to the first embodiment.
Alternatively, the electronic device may be a server.
Referring to fig. 3, fig. 3 is a schematic structural composition diagram of an electronic device according to an embodiment of the present disclosure. The electronic device may include a processor 31, a communication interface 32, a memory 33, and at least one communication bus 34. Wherein the communication bus 34 is used for realizing direct connection communication of these components. The communication interface 32 of the device in this embodiment is used for performing signaling or data communication with other node devices. The processor 31 may be an integrated circuit chip having signal processing capabilities.
The Processor 31 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor 31 may be any conventional processor or the like.
The Memory 33 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Read Only Memory (EPROM), an electrically Erasable Read Only Memory (EEPROM), and the like. The memory 33 has stored therein computer readable instructions which, when executed by said processor 31, the device is able to carry out the various steps involved in the method embodiment of fig. 1 described above.
Optionally, the electronic device may further include a memory controller, an input output unit. The memory 33, the memory controller, the processor 31, the peripheral interface, and the input/output unit are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these components may be electrically connected to each other via one or more communication buses 34. The processor 31 is adapted to execute executable modules stored in the memory 33, such as software functional modules or computer programs comprised by the device.
The input and output unit is used for providing a task for a user to create and start an optional time period or preset execution time for the task creation so as to realize the interaction between the user and the server. The input/output unit may be, but is not limited to, a mouse, a keyboard, and the like.
It will be appreciated that the configuration shown in fig. 3 is merely illustrative and that the electronic device may include more or fewer components than shown in fig. 3 or have a different configuration than shown in fig. 3. The components shown in fig. 3 may be implemented in hardware, software, or a combination thereof.
In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the 5G cell synchronization method according to the first embodiment.
Embodiments of the present application further provide a computer program product, which when running on a computer, causes the computer to execute the method described in the method embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based devices that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.
The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
Claims (10)
1. A5G cell synchronization method, the method comprising:
acquiring physical broadcast channel information of a main cell in a 5G cell;
analyzing the physical broadcast channel information of the main cell to generate a broadcast channel demodulation reference sequence of the main cell;
acquiring a frequency domain channel estimation value of the main cell according to the broadcast channel demodulation reference sequence of the main cell;
obtaining a time domain offset value of the main cell according to the frequency domain channel estimation value of the main cell;
acquiring a time domain offset value of at least one auxiliary cell in the 5G cells;
obtaining a time domain deviation between the time domain offset value of the primary cell and the time domain offset value of the at least one secondary cell;
and synchronizing the primary cell and the at least one secondary cell according to the time domain deviation.
2. The 5G cell synchronization method according to claim 1, wherein the step of obtaining the frequency domain channel estimation value of the primary cell according to the broadcast channel demodulation reference sequence of the primary cell comprises:
acquiring a broadcast channel demodulation reference signal in the physical broadcast channel information of the main cell;
and carrying out filtering interpolation processing on the broadcast channel demodulation reference signal of the main cell and the broadcast channel demodulation reference signal sequence of the main cell to obtain a frequency domain channel estimation value of the main cell.
3. The 5G cell synchronization method according to claim 1, wherein the step of obtaining the time domain offset value of the primary cell according to the frequency domain channel estimation value of the primary cell comprises:
performing inverse discrete Fourier transform on the frequency domain channel estimation value of the main cell to obtain a time domain channel estimation value of the main cell;
acquiring a maximum index of the time domain channel estimation value of the main cell;
and determining the maximum index as a time domain offset value of the primary cell.
4. The 5G cell synchronization method according to claim 1, wherein the step of obtaining the time domain offset value of at least one secondary cell in the 5G cell comprises:
acquiring physical broadcast channel information of at least one auxiliary cell in the 5G cell;
analyzing the physical broadcast channel information of the at least one auxiliary cell to generate a broadcast channel demodulation reference signal sequence of the at least one auxiliary cell;
filtering and interpolating the broadcast channel demodulation reference signal sequence of the at least one auxiliary cell to obtain a frequency domain channel estimation value of the at least one auxiliary cell;
and obtaining a time domain offset value of the at least one secondary cell according to the frequency domain channel estimation value of the at least one secondary cell.
5. A 5G cell synchronization apparatus, the apparatus comprising:
the system comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring the physical broadcast channel information of a main cell in a 5G cell; the method is also used for acquiring a time domain offset value of at least one auxiliary cell in the 5G cell;
the analysis module is used for analyzing the physical broadcast channel information of the main cell and generating a broadcast channel demodulation reference sequence of the main cell;
a frequency domain channel estimation value obtaining module, configured to obtain a frequency domain channel estimation value of the primary cell according to the broadcast channel demodulation reference sequence of the primary cell;
a time domain offset value obtaining module, configured to obtain a time domain offset value of the primary cell according to the frequency domain channel estimation value of the primary cell;
a time domain offset difference obtaining module, configured to obtain a time domain offset between the time domain offset value of the primary cell and the time domain offset value of the at least one secondary cell;
and the synchronization module is used for synchronizing the primary cell and the at least one secondary cell according to the time domain deviation.
6. The 5G cell synchronization apparatus of claim 5, wherein the frequency domain channel estimation value obtaining module is further configured to:
acquiring a broadcast channel demodulation reference signal in the physical broadcast channel information of the main cell;
and carrying out filtering interpolation processing on the broadcast channel demodulation reference signal of the main cell and the broadcast channel demodulation reference signal sequence of the main cell to obtain a frequency domain channel estimation value of the main cell.
7. The 5G cell synchronization apparatus of claim 5, wherein the time domain offset value obtaining module is further configured to:
performing inverse discrete Fourier transform on the frequency domain channel estimation value of the main cell to obtain a time domain channel estimation value of the main cell;
acquiring a maximum index of the time domain channel estimation value of the main cell;
and determining the maximum index as a time domain offset value of the primary cell.
8. The 5G cell synchronization apparatus of claim 5, wherein the time domain offset difference obtaining module is further configured to:
acquiring physical broadcast channel information of at least one auxiliary cell in the 5G cell;
analyzing the physical broadcast channel information of the at least one auxiliary cell to generate a broadcast channel demodulation reference signal sequence of the at least one auxiliary cell;
carrying out filtering interpolation processing on the broadcast channel demodulation reference signal sequence of the at least one auxiliary cell to obtain a frequency domain channel estimation value of the at least one auxiliary cell;
and obtaining a time domain offset value of the at least one secondary cell according to the frequency domain channel estimation value of the at least one secondary cell.
9. An electronic device, comprising a memory for storing a computer program and a processor that executes the computer program to cause the electronic device to perform the 5G cell synchronization method of any of claims 1-4.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the 5G cell synchronization method of any of claims 1 to 4.
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