CN108880702B - Antenna correction method and device for FDD system and base station - Google Patents
Antenna correction method and device for FDD system and base station Download PDFInfo
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- CN108880702B CN108880702B CN201710324495.7A CN201710324495A CN108880702B CN 108880702 B CN108880702 B CN 108880702B CN 201710324495 A CN201710324495 A CN 201710324495A CN 108880702 B CN108880702 B CN 108880702B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Abstract
The invention provides an antenna correction method, an antenna correction device and a base station of an FDD system, which relate to the technical field of communication and comprise the following steps: a base station creates a virtual user and configures an uplink Sounding Reference Signal (SRS) period for the virtual user; the base station transmits pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station according to the SRS period; and the base station uses the receiving antenna to carry out uplink antenna correction according to the correction sequence data received by the uplink antenna correction sequence data. The embodiment of the invention can avoid the interference of the uplink signal of the user to the uplink antenna correction signal, and improve the accuracy of antenna correction, thereby improving the performance of antenna correction.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an antenna calibration method, an antenna calibration apparatus, and a base station for a Frequency Division Duplex (FDD) system.
Background
With the continuous development of mobile communication technology, the fifth Generation (5th-Generation, 5G) mobile communication technology has a significant breakthrough. Specifically, a large-scale antenna array system is deployed in a large-scale stadium, a concert, a business center, a traffic hub and other areas with high user density, and a large-scale Multiple-Input Multiple-Output (Massive MIMO) technology is utilized to effectively improve the data service transmission rate. In a practical large-scale antenna array system, each radio frequency channel has certain errors, and the core algorithm of the intelligent antenna requires accurate knowledge of the array manifold, so that the receiving and transmitting radio frequency channels need to be corrected, and the intelligent antenna can effectively control the beam direction and shape by detecting and correcting the errors among the radio frequency channels, thereby realizing intelligent transmission and intelligent reception.
Long Term Evolution (LTE) wireless communication systems are divided into two systems, Time Division Duplex (TDD) and FDD. For a TDD system, it is convenient to realize antenna calibration, because the TDD system uses the same frequency point for uplink and downlink, there is a Guard Period (GP) time slot between the uplink and downlink, and the TDD system does not receive or transmit in the GP time slot, so that the antenna calibration can be performed in the GP time slot, thus the normal receiving and transmitting of wireless communication data are not affected, and the interference of normal service signals to calibration signals and the antenna calibration performance are not affected. In the FDD system, because the uplink and the downlink respectively use different frequency points to work in parallel and no GP time slot exists, when the FDD system performs antenna correction, the uplink signal of a user can interfere with the uplink antenna correction signal, and the antenna correction performance is affected. Therefore, when the FDD system performs antenna calibration, the uplink signal of the user may interfere with the uplink antenna calibration signal.
Disclosure of Invention
Embodiments of the present invention provide an antenna calibration method, an antenna calibration apparatus, and a base station for an FDD system, which solve the problem that an uplink signal of a user may interfere with an uplink antenna calibration signal when the FDD system performs antenna calibration.
In a first aspect, to achieve the above object, an embodiment of the present invention provides an antenna calibration method for an FDD system, including:
a base station creates a virtual user and configures an uplink Sounding Reference Signal (SRS) period for the virtual user;
the base station transmits pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station according to the SRS period;
and the base station uses the receiving antenna to carry out uplink antenna correction according to the correction sequence data received by the uplink antenna correction sequence data.
In a second aspect, an embodiment of the present invention further provides an antenna calibration apparatus, including:
the system comprises a management module, a detection module and a feedback module, wherein the management module is used for creating a virtual user and configuring an uplink Sounding Reference Signal (SRS) period for the virtual user;
a transmission module, configured to transmit pre-obtained uplink antenna calibration sequence data to a receiving antenna of the base station according to the SRS period;
and the correction module is used for correcting the uplink antenna by using the receiving antenna according to the correction sequence data received by the uplink antenna correction sequence data.
In a third aspect, an embodiment of the present invention further provides a base station, including a processor, a memory, a network interface, and a user interface, where the processor, the memory, the network interface, and the user interface are coupled together through a bus system, and the processor is configured to read a program in the memory and execute the steps in the antenna calibration method for an FDD system provided in the embodiment of the present invention.
In a fourth aspect, an embodiment of the present invention further provides a computer storage medium, where one or more programs executable by a computer are stored in the computer storage medium, and when the one or more programs are executed by the computer, the computer is caused to execute the antenna calibration method of an FDD system as provided above.
One of the above technical solutions has the following advantages or beneficial effects:
in the embodiment of the invention, a virtual user is established in a base station using an FDD system, an uplink Sounding Reference Signal (SRS) period is configured for the virtual user, and when the virtual user transmits the uplink sounding reference signal, other users keep silent in the SRS period and do not transmit the uplink signal according to the regulation of an LTE protocol. By adopting the embodiment, the interference of the uplink signal of the user to the uplink antenna correction signal can be avoided, the accuracy of antenna correction is improved, and the performance of antenna correction is improved.
Drawings
Fig. 1 is a flowchart illustrating an antenna calibration method of an FDD system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an antenna calibration method of an FDD system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an antenna calibration apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another antenna calibration apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another antenna calibration apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another antenna calibration apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention can be applied to the scenes of large-scale antenna base stations using the FDD system deployed in areas with high user concentration, such as large-scale stadiums, concerts, business centers, traffic hubs and the like, and a plurality of user terminals can exist in the places with high user concentration.
Example 1
As shown in fig. 1, an embodiment of the present invention provides an antenna calibration method for an FDD system, including the following steps:
step S101, a base station creates a virtual user and configures an uplink Sounding Reference Signal (SRS) period for the virtual user;
step S102, the base station transmits pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station according to the SRS period;
and step S103, the base station uses the receiving antenna to carry out uplink antenna correction according to the correction sequence data received by the uplink antenna correction sequence data.
The base station refers to a large-scale base station with an antenna using an FDD system, and is generally deployed in areas with high user concentration, such as large stadiums, concerts, business centers, transportation hubs and the like, and the areas with high user concentration have a large demand for data transmission, and the antenna needs to be corrected in order to ensure the stability of data transmission.
In the embodiment of the present invention, the SRS period may be set to 20 ms, 40 ms or 80 ms, and is preferably set to 20 ms, where the setting of the SRS period is to allow the base station to determine the uplink antenna correction processing time according to the SRS period, and the length of the uplink antenna correction processing time is generally smaller than the length of the SRS period, and in the uplink antenna correction processing time, other users do not send uplink signals, so that the base station can perform antenna correction without being interfered by uplink signals of the users.
The uplink antenna calibration sequence data is stored in the base station, specifically in the uplink antenna sequence transmitting module shown in fig. 3, when the base station performs antenna calibration, the uplink antenna calibration sequence data is acquired in advance, and the time for acquiring the uplink antenna calibration sequence data only needs to be before the uplink antenna calibration sequence data is transmitted to the receiving antenna of the base station, and the specific time for acquiring the uplink antenna calibration sequence data is not limited herein.
In the embodiment of the invention, a virtual user is established in a base station using an FDD system, an uplink Sounding Reference Signal (SRS) period is configured for the virtual user, and when the virtual user transmits the uplink sounding reference signal, other users keep silent in the SRS period and do not transmit the uplink signal according to the regulation of an LTE protocol. Therefore, the base station can carry out uplink antenna correction in the SRS period, and the interference of uplink signals of other users to uplink antenna correction signals is avoided.
Example 2
As shown in fig. 2, an embodiment of the present invention provides another method for calibrating an antenna of an FDD system, including:
step S201, a base station creates a virtual user and configures an uplink Sounding Reference Signal (SRS) period for the virtual user;
step S202, the base station transmits the pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station according to the SRS period;
step S203, the base station uses the receiving antenna to carry out uplink antenna correction according to the correction sequence data received by the uplink antenna correction sequence data;
step S204, the base station deletes the virtual user.
In the embodiment of the invention, after all the antenna correction steps are completed, the set virtual users are deleted, so that the resources occupied by the virtual users can be released, and the processing capacity of the base station can be further optimized.
Optionally, step S202 may include:
the base station determines uplink antenna correction processing time according to the SRS period, and sets uplink antenna correction processing time in the uplink antenna correction processing time;
timing the uplink antenna correction processing time in a mode of at least one of a frame number, a subframe number and a symbol;
and when the timing reaches the uplink antenna correction processing time, transmitting the uplink antenna correction sequence data acquired in advance to a receiving antenna of the base station.
In the embodiment of the present invention, after determining the uplink antenna calibration processing time according to the SRS period, the base station may time the uplink antenna calibration processing time in a manner of at least one of a frame number, a subframe number, and a symbol in the system, and then the time reaches the uplink antenna calibration processing time, and transmit uplink antenna calibration sequence data, which is obtained in advance from an uplink antenna calibration sequence transmitting module of the antenna calibration device shown in fig. 3, to a receiving antenna of the base station.
Optionally, step S202 may include:
and the base station transmits the pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station in a coupling mode according to the SRS period.
In the embodiment of the present invention, the coupling mode may be capacitive coupling or transformer coupling, and may be any coupling mode for transmitting the uplink antenna calibration sequence data to the receiving antenna of the base station.
Optionally, the base station includes multiple receiving antennas, and step S203 may include:
the base station controls the plurality of receiving antennas to receive the uplink antenna correction sequence data;
the base station carries out frequency reduction processing on the antenna correction sequence data received by the plurality of receiving antennas;
the base station identifies difference values between antenna correction sequence data received by the plurality of receiving antennas after frequency reduction processing, wherein the difference values are at least one difference value of amplitude and phase;
and the base station corrects at least one of the amplitude and the phase corrected by the plurality of receiving antennas to be the same according to the difference value.
In the embodiment of the present invention, various optional embodiments are added on the basis of the embodiment shown in fig. 1, and these optional embodiments may be implemented in combination with each other or individually, and can achieve the effect of avoiding interference of uplink signals of other users to uplink antenna calibration signals when a base station using an FDD system performs antenna calibration.
In the embodiment of the invention, the base station comprises a plurality of receiving antennas, the base station controls the plurality of receiving antennas to receive uplink antenna correction sequence data taking electromagnetic waves as carriers, then the uplink antenna correction sequence data taking induced current as carriers are obtained through conversion, then the uplink antenna correction sequence data received by the plurality of receiving antennas are subjected to frequency reduction processing, then difference values among the antenna correction sequence data received by the plurality of receiving antennas after the frequency reduction processing are identified, and finally the base station corrects at least one of the amplitude and the phase corrected by the plurality of receiving antennas to be the same according to the difference values. The frequency-reducing processing comprises a processing process of sequentially reducing uplink antenna correction sequence data which are received by a receiving antenna and take electromagnetic waves as carriers into radio-frequency signals and intermediate-frequency signals through conversion to obtain the uplink antenna correction sequence data which take induced current as carriers. Wherein the difference value is a difference value of at least one of the amplitude and the phase. Through the processing procedure, the correction of the uplink antenna can be realized more conveniently.
Example 3
As shown in fig. 3, fig. 3 is a schematic structural diagram of an antenna calibration apparatus according to an embodiment of the present invention, and the antenna calibration apparatus may include an antenna calibration management module 301, a timing control module 302, an uplink calibration sequence sending module 303, a receiving antenna 305, an uplink radio frequency module 306, an uplink intermediate frequency module 307, and an uplink baseband module 308.
The antenna calibration management module 301 may create a virtual user according to the uplink antenna calibration requirement, configure an SRS period for the virtual user, determine uplink antenna processing time according to the SRS period of the virtual user, set uplink antenna calibration processing time within the uplink antenna calibration processing time, and notify the uplink antenna calibration processing time to the timing control module 302, and at the same time, the antenna calibration management module 301 notifies the uplink baseband module 308 of SRS configuration resources of the virtual user, where the SRS configuration resources include frequency points occupied by SRS;
the timing control module 302 may perform timing by using at least one of a frame number, a subframe number, or a symbol, and when the timing reaches the uplink antenna calibration processing time, transmit the uplink antenna calibration sequence data stored in the uplink calibration sequence transmitting module 303, which is acquired in advance, to the receiving antenna 305 of the base station through the coupling loop 304, and simultaneously, the timing control module 302 notifies the uplink baseband module 308;
the antenna calibration apparatus includes a plurality of receiving antennas 305, wherein the antenna calibration apparatus can control the plurality of receiving antennas 305 to receive the uplink antenna calibration sequence data through the coupling loop 304 and perform down-conversion processing on the uplink antenna calibration sequence data.
The uplink baseband module 308 may identify a difference value between antenna calibration sequence data received by the multiple receiving antennas 305 after frequency reduction processing according to the time indication sent by the timing control module 302, input the difference value into the antenna calibration management module 301, and calibrate at least one of the amplitude and the phase calibrated by the multiple receiving antennas in the antenna calibration management module 301 to be the same. Wherein the difference value is a difference value of at least one of the amplitude and the phase.
In the embodiment of the present invention, each process of performing antenna calibration in the method embodiments provided in fig. 1 to fig. 2 can be implemented through cooperation between the different modules, and is not described herein again to avoid repetition.
As shown in fig. 4, fig. 4 is a schematic structural diagram of an antenna calibration apparatus according to an embodiment of the present invention, and an embodiment of the present invention provides an antenna calibration apparatus 400, which is applied to a base station and includes:
a management module 401, configured to create a virtual user and configure an uplink sounding reference signal SRS period for the virtual user;
a transmission module 402, configured to transmit pre-obtained uplink antenna calibration sequence data to a receiving antenna of the base station according to the SRS period;
a calibration module 403, configured to perform uplink antenna calibration by using the receiving antenna according to the calibration sequence data received by the uplink antenna calibration sequence data.
Optionally, as shown in fig. 5, the transmission module 402 includes:
the time processing submodule 40201 is configured to determine uplink antenna correction processing time according to the SRS period, and set uplink antenna correction processing time in the uplink antenna correction processing time;
a timing submodule 40202 for timing the uplink antenna correction processing time in at least one of a frame number, a subframe number, and a symbol;
a transmission sub-module 40203, configured to transmit the uplink antenna calibration sequence data acquired in advance to the receiving antenna of the base station when the timing reaches the uplink antenna calibration processing time.
The time processing submodule 40201 determines uplink antenna correction processing time according to the SRS period, after uplink antenna correction processing time is set in the uplink antenna correction processing time, the timing submodule 40202 times the uplink antenna correction processing time in a manner of at least one of a frame number, a subframe number and a symbol, when the time reaches the uplink antenna correction processing time, the timing submodule 40202 sends a start command to an uplink correction sequence sending module of the base station and notifies the uplink baseband module, and after receiving the start command, the uplink correction sequence sending module sends uplink antenna correction sequence data to a receiving antenna of the base station through the transmission submodule 40203.
Optionally, the transmission module 402 is configured to transmit the uplink antenna calibration sequence data acquired in advance to the receiving antenna of the base station in a coupling manner according to the SRS period.
Optionally, as shown in fig. 6, the correction module 403 includes:
a receiving submodule 40301, configured to control the multiple receiving antennas to receive the uplink antenna calibration sequence data;
a down conversion sub-module 40302, configured to down convert the antenna correction sequence data received by the multiple receiving antennas;
an identifying sub-module 40303, configured to identify a difference value between the antenna calibration sequence data received by the multiple receiving antennas after frequency reduction processing, where the difference value is a difference value of at least one of an amplitude and a phase;
a correction sub-module 40304, configured to correct at least one of the corrected amplitudes and phases of the multiple receiving antennas to be the same according to the difference value.
The antenna calibration apparatus 400 can implement each process of antenna calibration in the method embodiments provided in fig. 1 to fig. 2, and is not described herein again to avoid repetition. The antenna calibration apparatus 400 can solve the problem that the uplink signal of the user will interfere with the uplink antenna calibration signal when the base station using the FDD system performs antenna calibration, and provides an antenna calibration apparatus in which the uplink signal of the user will not interfere with the uplink antenna calibration signal when performing antenna calibration.
In this embodiment of the present invention, the management module 401 and the correction module 403 in the antenna correction apparatus 400 may be processors in a base station, and the transmission module 402 may be a receiving antenna in the base station.
Example 5
As shown in fig. 7, fig. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention, where the base station includes: a processor 701, a memory 702, a network interface 704, and a user interface 703. The various components in the base station 700 are coupled together by a bus system 705. It is understood that the bus system 705 is used to enable communications among the components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various busses are labeled in figure 7 as the bus system 705.
The user interface 703 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.
It is to be understood that the memory 702 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 702 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 702 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 7021 and application programs 7022.
In some embodiments, memory 702 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 7021 and application programs 7022.
The operating system 7021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 7022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. Programs that implement methods in accordance with embodiments of the present invention can be included within application program 7022.
In the embodiment of the present invention, the processor 701 is configured to, by calling a program or an instruction stored in the memory 702, specifically, a program or an instruction stored in the application 7022:
creating a virtual user, and configuring an uplink Sounding Reference Signal (SRS) period for the virtual user;
transmitting the pre-acquired uplink antenna correction sequence data to a receiving antenna of a base station according to the SRS period;
and correcting the uplink antenna by using the receiving antenna according to the correction sequence data received by the uplink antenna correction sequence data.
The method disclosed in the above embodiments of the present invention may be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The Processor 701 may be a general-purpose Processor, 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 device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702 and performs the steps of the above method in combination with the hardware thereof.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
Optionally, the transmitting, by the processor 701, the uplink antenna calibration sequence data acquired in advance to the receiving antenna of the base station according to the SRS period includes:
the processor 701 determines uplink antenna correction processing time according to the SRS period, and sets uplink antenna correction processing time in the uplink antenna correction processing time;
the processor 701 times the uplink antenna correction processing time in a manner of at least one of a frame number, a subframe number and a symbol;
when the timing reaches the uplink antenna calibration processing time, the processor 701 transmits the uplink antenna calibration sequence data acquired in advance to the receiving antenna of the base station.
Optionally, the transmitting, by the processor 701, the uplink antenna calibration sequence data acquired in advance to the receiving antenna of the base station according to the SRS period includes:
the processor 701 transmits the uplink antenna calibration sequence data acquired in advance to the receiving antenna of the base station in a coupling manner according to the SRS period.
Optionally, after the processor 701 performs uplink antenna calibration using the calibration sequence data received by the receiving antenna according to the uplink antenna calibration sequence data, the method further includes:
the processor 701 deletes the virtual user.
Optionally, the processor 701 performs uplink antenna calibration by using the receiving antenna according to the calibration sequence data received by the uplink antenna calibration sequence data, including:
the processor 701 controls the multiple receiving antennas to receive the uplink antenna calibration sequence data;
the processor 701 performs down-conversion processing on the antenna correction sequence data received by the multiple receiving antennas;
the processor 701 identifies a difference value between the antenna calibration sequence data received by the plurality of receiving antennas after the frequency reduction processing, wherein the difference value is at least one of an amplitude difference value and a phase difference value;
the processor 701 corrects at least one of the amplitude and the phase of the plurality of receiving antenna corrections to be the same according to the difference value.
It should be noted that, in this embodiment, the base station may implement any implementation manner in the method embodiments of the present invention, and achieve the same beneficial effects, and details are not described here.
It will be understood by those skilled in the art that all or part of the steps of the method for implementing the above embodiments may be implemented by hardware associated with program instructions, and the program may be stored in a computer readable medium, and when executed, the program includes the following steps:
a base station creates a virtual user and configures an uplink Sounding Reference Signal (SRS) period for the virtual user;
the base station transmits pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station according to the SRS period;
and the base station uses the receiving antenna to carry out uplink antenna correction according to the correction sequence data received by the uplink antenna correction sequence data.
When the program is executed, the base station transmits the uplink antenna calibration sequence data acquired in advance to the receiving antenna of the base station according to the SRS period, and the program includes:
the base station determines uplink antenna correction processing time according to the SRS period, and sets uplink antenna correction processing time in the uplink antenna correction processing time;
counting the uplink antenna correction processing time in a mode of at least one of a frame number, a subframe number and a symbol;
and when the count reaches the uplink antenna correction processing time, transmitting the uplink antenna correction sequence data acquired in advance to a receiving antenna of the base station.
Optionally, the transmitting, by the base station, the uplink antenna calibration sequence data acquired in advance to the receiving antenna of the base station according to the SRS period includes:
and the base station transmits the pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station in a coupling mode according to the SRS period.
Optionally, the program further includes, when executed: and the base station deletes the virtual user.
Optionally, the base station performs uplink antenna calibration by using the receiving antenna according to the calibration sequence data received by the uplink antenna calibration sequence data, including:
the base station controls the plurality of receiving antennas to receive the uplink antenna correction sequence data;
the base station carries out frequency reduction processing on the antenna correction sequence data received by the plurality of receiving antennas;
the base station identifies difference values between antenna correction sequence data received by the plurality of receiving antennas after frequency reduction processing, wherein the difference values are at least one difference value of amplitude and phase;
and the base station corrects at least one of the amplitude and the phase corrected by the plurality of receiving antennas to be the same according to the difference value.
The storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An antenna calibration method for FDD system in FDD system is characterized in that the method comprises the following steps:
a base station creates a virtual user, configures an uplink Sounding Reference Signal (SRS) period for the virtual user, and when the virtual user sends the uplink sounding reference signal, other users do not send uplink signals in the SRS period;
the base station transmits pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station according to the SRS period;
the base station uses the receiving antenna to carry out uplink antenna correction according to the correction sequence data received by the uplink antenna correction sequence data;
the base station transmits the pre-acquired uplink antenna correction sequence data to a receiving antenna of the base station according to the SRS period, and the method comprises the following steps:
the base station determines uplink antenna correction processing time according to the SRS period, and sets uplink antenna correction processing time in the uplink antenna correction processing time;
timing the uplink antenna correction processing time;
and when the timing reaches the uplink antenna correction processing time, the base station transmits the uplink antenna correction sequence data acquired in advance to a receiving antenna of the base station in a coupling mode according to the SRS period.
2. The method of claim 1, wherein the timing the uplink antenna correction processing time comprises: and timing the uplink antenna correction processing time in a mode of at least one of a frame number, a subframe number and a symbol.
3. The method according to any of claims 1-2, wherein after the base station performs uplink antenna calibration using the receive antenna based on the calibration sequence data received from the uplink antenna calibration sequence data, the method further comprises:
and the base station deletes the virtual user.
4. The method according to any of claims 1-2, wherein the base station performs uplink antenna calibration using the receive antenna based on the calibration sequence data received from the uplink antenna calibration sequence data, comprising:
the base station controls a plurality of receiving antennas to receive the uplink antenna correction sequence data;
the base station carries out frequency reduction processing on the antenna correction sequence data received by the plurality of receiving antennas;
the base station identifies difference values between antenna correction sequence data received by the plurality of receiving antennas after frequency reduction processing, wherein the difference values are at least one difference value of amplitude and phase;
and the base station corrects at least one of the amplitude and the phase corrected by the plurality of receiving antennas to be the same according to the difference value.
5. An antenna calibration device applied to a base station, comprising:
the management module is used for creating a virtual user and configuring an uplink Sounding Reference Signal (SRS) period for the virtual user, and when the virtual user sends the uplink sounding reference signal, other users do not send uplink signals in the SRS period;
a transmission module, configured to transmit pre-obtained uplink antenna calibration sequence data to a receiving antenna of the base station according to the SRS period;
a correction module, configured to perform uplink antenna correction using the receiving antenna according to correction sequence data received by the uplink antenna correction sequence data;
the transmission module includes:
the time processing submodule is used for determining uplink antenna correction processing time according to the SRS period and setting uplink antenna correction processing time in the uplink antenna correction processing time;
the timing submodule is used for timing the uplink antenna correction processing time;
and the transmission sub-module is used for transmitting the uplink antenna correction sequence data acquired in advance to the receiving antenna of the base station in a coupling mode according to the SRS period when the timing reaches the uplink antenna correction processing time.
6. The antenna calibration device according to claim 5, wherein the timing submodule is configured to time the uplink antenna calibration processing time in at least one of a frame number, a subframe number, and a symbol.
7. The antenna calibration device of any one of claims 5 or 6, wherein the calibration module comprises:
a receiving submodule, configured to control multiple receiving antennas to receive the uplink antenna calibration sequence data;
the frequency reduction sub-module is used for performing frequency reduction processing on the antenna correction sequence data received by the plurality of receiving antennas;
the identification submodule is used for identifying difference values between antenna correction sequence data received by the plurality of receiving antennas after frequency reduction processing, wherein the difference values are at least one difference value of amplitude and phase;
and the correction submodule is used for correcting at least one of the amplitude and the phase corrected by the plurality of receiving antennas to be the same according to the difference value.
8. A base station comprising a processor, a memory, a network interface and a user interface, coupled together by a bus system, the processor being configured to read a program from the memory and to perform the steps of the method for antenna calibration in an FDD system according to any of claims 1 to 4.
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