CN115941073A

CN115941073A - Link calibration method, device and storage medium

Info

Publication number: CN115941073A
Application number: CN202110997763.8A
Authority: CN
Inventors: 王世华; 吝子祥
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2023-04-07

Abstract

The present disclosure provides a link calibration method, apparatus and storage medium, which are applied to an Active Antenna Unit (AAU) of a millimeter wave, and the method includes: determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band, calibrating the intermediate frequency link to obtain an intermediate frequency reference signal, acquiring a signal to be calibrated, wherein the signal to be calibrated is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and determining a calibration compensation value corresponding to the signal to be calibrated according to the intermediate frequency reference signal, wherein the calibration compensation value is used for calibrating the target link. Therefore, the convenience of calibrating the millimeter wave active antenna unit AAU link can be effectively improved, the calibration efficiency of the millimeter wave active antenna unit AAU link is effectively improved, the calibration precision of the millimeter wave active antenna unit AAU link is effectively improved, the construction cost of the millimeter wave active antenna unit AAU link calibration system is effectively reduced, and the millimeter wave active antenna unit AAU link calibration system is suitable for large-scale production line deployment.

Description

Link calibration method, device and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a link calibration method, an apparatus, and a storage medium.

Background

The fifth generation mobile communication (5th generation, 5g) millimeter wave Active Antenna Unit (AAU) adopts a large-scale phased array technology, which relates to a phased array Antenna and realizes beam forming by adjusting the amplitude and phase characteristics of each link. Due to the fact that the amplitude and the phase of each link of the millimeter wave active antenna unit AAU are inconsistent, adverse effects such as beam pointing deviation, sidelobe level improvement and equivalent radiation power reduction can be caused, communication quality is reduced, the technical problem that the amplitude and the phase of each link of the millimeter wave active antenna unit AAU are inconsistent is solved, and the communication quality of the millimeter wave active antenna unit AAU is improved. Calibration of the millimeter wave active antenna unit AAU link is typically required.

In the related art, the calibration of the millimeter wave active antenna unit AAU link is usually realized by two methods, namely receiving array calibration and transmitting array calibration.

In the conventional method, the calibration process of the millimeter wave active antenna unit AAU link is complicated, and the precision is low, so that the calibration efficiency of the millimeter wave active antenna unit AAU link is influenced, and the calibration effect of the millimeter wave active antenna unit AAU link is influenced.

Disclosure of Invention

The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the purpose of the present disclosure is to provide a link calibration method, a device and a storage medium, which can effectively improve the convenience of the calibration of the AAU link of the millimeter wave active antenna unit, effectively improve the calibration efficiency of the AAU link of the millimeter wave active antenna unit, effectively improve the calibration precision of the AAU link of the millimeter wave active antenna unit, effectively reduce the construction cost of the AAU link calibration system of the millimeter wave active antenna unit, and are suitable for large-scale production line deployment.

The link calibration method provided in the embodiment of the first aspect of the present disclosure is applied to a millimeter wave active antenna unit AAU, and includes: determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band, calibrating the intermediate frequency link to obtain an intermediate frequency reference signal, and acquiring a signal to be calibrated, wherein the signal to be calibrated is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, the target frequency band is higher than the intermediate frequency band, and a calibration compensation value corresponding to the signal to be calibrated is determined according to the intermediate frequency reference signal, and the calibration compensation value is used for calibrating the target link.

In some embodiments of the present disclosure, determining a calibration compensation value corresponding to a calibration signal to be measured according to an intermediate frequency reference signal includes:

acquiring a local oscillation signal provided by a millimeter wave Active Antenna Unit (AAU);

performing down-conversion processing on the calibration signal to be detected and the local oscillator signal to obtain a target signal to be detected;

determining a signal parameter value corresponding to a target signal to be detected according to the intermediate frequency reference signal;

a calibration compensation value is determined based on the signal parameter value.

In some embodiments of the present disclosure, the number of the if links is multiple, and the calibrating process is performed on the if links to obtain the if reference signal, including:

determining a plurality of reference compensation values respectively corresponding to a plurality of intermediate frequency links;

and generating an intermediate frequency reference signal according to the plurality of reference compensation values.

In some embodiments of the present disclosure, generating an intermediate frequency reference signal from a plurality of reference compensation values comprises:

respectively calibrating the plurality of intermediate frequency links according to the plurality of reference compensation values to obtain a plurality of calibrated intermediate frequency links;

acquiring a plurality of target sequence signals respectively output by a plurality of calibrated intermediate frequency links;

and generating an intermediate frequency reference signal according to the plurality of target sequence signals.

In some embodiments of the present disclosure, generating an intermediate frequency reference signal from a plurality of target sequence signals comprises:

and coupling the target sequence signals to obtain an intermediate frequency reference signal.

In some embodiments of the present disclosure, determining a plurality of reference compensation values corresponding to a plurality of intermediate frequency links, respectively, includes:

determining an intermediate frequency reference link from a plurality of intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal;

acquiring a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link to be calibrated currently in a plurality of intermediate frequency links;

determining a signal parameter difference between the calibration sequence signal and the reference sequence signal;

determining a reference compensation value corresponding to the current intermediate frequency link according to the signal parameter difference;

and updating the current intermediate frequency link to obtain a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links.

In some embodiments of the present disclosure, before acquiring the calibration sequence signal output by the current if link, the method further includes:

and starting the current intermediate frequency link and closing other intermediate frequency links, wherein the current intermediate frequency link and the other intermediate frequency links jointly form a plurality of intermediate frequency links.

In some embodiments of the present disclosure, the number of the target links is multiple, and before acquiring the calibration signal to be tested, the method further includes:

and starting a current target link and closing other target links, wherein the current target link is a target link to be calibrated currently, and the current target link and the other target links jointly form a plurality of target links.

The method provided by the embodiment of the first aspect of the disclosure includes determining an intermediate frequency link, where the intermediate frequency link corresponds to an intermediate frequency band, calibrating the intermediate frequency link to obtain an intermediate frequency reference signal, and obtaining a calibration signal to be detected, where the calibration signal to be detected is associated with a target link corresponding to an AAU of a millimeter wave active antenna unit, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band, and then determining a calibration compensation value corresponding to the calibration signal to be detected according to the intermediate frequency reference signal, where the calibration compensation value is used for calibrating the target link, so that convenience in calibrating the AAU link of the millimeter wave active antenna unit can be effectively improved, calibration efficiency of the AAU link of the millimeter wave active antenna unit is effectively improved, calibration accuracy of the AAU link of the millimeter wave active antenna unit is effectively improved, construction cost of an AAU link calibration system of the millimeter wave active antenna unit is effectively reduced, and the method is suitable for large-scale deployment of a production line.

The link calibration device provided by the embodiment of the second aspect of the present disclosure includes: the first determining unit is used for determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band; the calibration unit is used for calibrating the intermediate frequency link to obtain an intermediate frequency reference signal; the device comprises an acquisition unit, a detection unit and a control unit, wherein the acquisition unit is used for acquiring a signal to be calibrated, the signal to be calibrated is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than an intermediate frequency band; and the second determining unit is used for determining a calibration compensation value corresponding to the signal to be calibrated according to the intermediate frequency reference signal, and the calibration compensation value is used for calibrating the target link.

In some embodiments of the present disclosure, the second determining unit is specifically configured to:

performing down-conversion processing on the calibrated to-be-detected signal and the local oscillator signal to obtain a target to-be-detected signal;

and determining a calibration compensation value according to the signal parameter value.

In some embodiments of the present disclosure, the number of the if links is multiple, and the calibration unit is specifically configured to:

determining a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links;

In some embodiments of the present disclosure, the calibration unit is further configured to:

and updating the current intermediate frequency link to obtain a plurality of reference compensation values respectively corresponding to the intermediate frequency links.

before a calibration sequence signal output by a current intermediate frequency link is obtained, the current intermediate frequency link is started, and other intermediate frequency links are closed, wherein the current intermediate frequency link and the other intermediate frequency links jointly form a plurality of intermediate frequency links.

In some embodiments of the present disclosure, the number of target links is plural, further comprising:

and the starting unit is used for starting the current target link and closing other target links before the calibration to-be-detected signal is acquired, wherein the current target link is the current target link to be calibrated, and the current target link and the other target links jointly form a plurality of target links.

The link calibration device provided by the embodiment of the second aspect of the disclosure calibrates an intermediate frequency link by determining the intermediate frequency link, where the intermediate frequency link corresponds to an intermediate frequency band, to obtain an intermediate frequency reference signal, and obtains a calibration signal to be measured, where the calibration signal to be measured is associated with a target link corresponding to an AAU of a millimeter wave active antenna unit, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band, and then determines a calibration compensation value corresponding to the calibration signal to be measured according to the intermediate frequency reference signal, where the calibration compensation value is used for calibrating the target link, so that convenience in calibrating the AAU link of the millimeter wave active antenna unit can be effectively improved, calibration efficiency of the AAU link of the millimeter wave active antenna unit is effectively improved, calibration accuracy of the AAU link of the millimeter wave active antenna unit is effectively improved, construction cost of an AAU link calibration system of the millimeter wave active antenna unit is effectively reduced, and the link calibration device is suitable for large-scale production line deployment.

The link calibration device provided in the embodiment of the third aspect of the present disclosure includes: memory, transceiver, processor: a memory for storing a computer program; a transceiver for transceiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band;

calibrating the intermediate frequency link to obtain an intermediate frequency reference signal;

acquiring a calibration to-be-detected signal, wherein the calibration to-be-detected signal is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band;

and determining a calibration compensation value corresponding to the signal to be calibrated according to the intermediate frequency reference signal, wherein the calibration compensation value is used for calibrating the target link.

In some embodiments of the disclosure, the processor is specifically configured to:

In some embodiments of the disclosure, the number of the if links is multiple, and the processor is specifically configured to:

before a signal to be calibrated is acquired, a current target link is opened, and other target links are closed, wherein the current target link is a target link to be calibrated currently, and the current target link and the other target links jointly form a plurality of target links.

A processor-readable storage medium according to an embodiment of a fourth aspect of the present disclosure stores a computer program for causing a processor to execute: the embodiment of the first aspect of the present disclosure provides a link calibration method.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.

Drawings

The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic flowchart of a link calibration method according to an embodiment of the disclosure;

fig. 2 is a schematic structural diagram of an AAU link calibration system of a millimeter wave active antenna unit in an embodiment of the present disclosure;

FIG. 3a is a schematic diagram of an X-axis step-and-scan pattern of an embodiment of the present disclosure;

FIG. 3b is a schematic diagram of a Y-axis step-and-scan pattern in accordance with an embodiment of the present disclosure;

fig. 4 is a schematic flowchart of a link calibration method according to another embodiment of the disclosure;

fig. 5 is a schematic flowchart of a link calibration method according to another embodiment of the disclosure;

fig. 6 is a schematic diagram of an intermediate frequency link calibration of an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a link calibration apparatus according to an embodiment of the disclosure;

fig. 8 is a schematic structural diagram of a link calibration apparatus according to another embodiment of the present disclosure.

Detailed Description

The term "and/or" in the embodiments of the present disclosure describes an association relationship of associated objects, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The term "plurality" in the embodiments of the present disclosure means two or more, and other terms are similar thereto.

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can be applied to various systems, especially 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a universal internet Access (WiMAX) system, a New Radio Network (NR) system, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

Fig. 1 is a schematic flowchart of a link calibration method according to an embodiment of the disclosure.

It should be noted that the main execution body of the link calibration method of this embodiment is a link calibration device, which may be implemented in a software and/or hardware manner, and the device may be integrated with the millimeter wave active antenna unit AAU to form a millimeter wave active antenna unit AAU link calibration system.

As shown in fig. 1, the link calibration method includes:

s101: and determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band.

As shown in fig. 2, fig. 2 is a schematic structural diagram of an AAU link calibration system of a millimeter wave active antenna unit in the embodiment of the present disclosure, including: the microwave oven comprises a microwave dark box, a probe, a scanning frame, a switch box, a frequency conversion module, a vector network analyzer, a millimeter wave active antenna Unit AAU, a baseband processing Unit (Base Band Unit, BBU), a network switch, a network cable, a radio frequency cable, an optical fiber and a trigger line of 10M, wherein the trigger line refers to a Moving Average power distribution (MACD) and a Personal Computer (PC), the probe can be 8 dual-polarization probe antennas, and the number of channels of the switch box can be 2X16 without limitation.

The link calibration method described in the embodiment of the present disclosure may be applied to the millimeter wave active antenna unit AAU shown in fig. 2, so as to implement calibration of each link in the millimeter wave active antenna unit AAU.

In the embodiment of the present disclosure, before calibrating each link of the millimeter wave active antenna unit AAU, the millimeter wave active antenna unit AAU link calibration system shown in fig. 2 may be preprocessed, for example: the vector network analyzer can be set according to the frequency point requirement of the millimeter wave active antenna unit AAU for calibration, the standard horn antenna is used for aligning the probes of the microwave dark box one by one, the amplitude and the phase of the probes and the switch box are measured respectively, and the amplitude value and the phase value obtained by measurement are stored.

In the millimeter wave active antenna unit AAU, the links may be intermediate frequency links, high frequency links, and the like, and the number of the intermediate frequency links may be one or more, which is not limited to this.

The if link corresponds to an if band (i.e., an if band corresponding to Sub-6G), and Sub-6G means a frequency lower than 6GHz.

That is, in this embodiment, the determining of the intermediate frequency link may be determining, as the intermediate frequency link, a link whose frequency band corresponds to Sub-6G from among the plurality of links in the millimeter wave active antenna unit AAU.

S102: and calibrating the intermediate frequency link to obtain an intermediate frequency reference signal.

After the intermediate frequency link is obtained, the intermediate frequency link may be calibrated to obtain a coupling signal of a signal output by the calibrated intermediate frequency link, where the signal may be referred to as an intermediate frequency reference signal, and the intermediate frequency reference signal may be used as a reference signal for calibrating the high frequency link to assist in performing link calibration

After the link calibration processing on the intermediate frequency link is completed, a signal output by the intermediate frequency link after the calibration processing can be obtained and used as an intermediate frequency reference signal.

S103: and acquiring a calibration to-be-detected signal, wherein the calibration to-be-detected signal is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band.

In this embodiment, before the calibration to-be-detected signal is acquired, the current target link may be opened, and other target links may be closed, so that in the acquisition process of the calibration to-be-detected signal, signal interference of other links on the current link may be effectively reduced, and the accuracy of the acquired calibration to-be-detected signal may be effectively ensured.

The current target link is a target link to be calibrated currently, and the current target link and other target links jointly form a plurality of target links.

The target link may correspond to a target frequency band, the target frequency band is higher than the intermediate frequency band, the target link may output a calibration sequence signal, the signal may be referred to as a calibration signal to be measured, and the calibration signal to be measured may be used as a reference signal when the target link is calibrated, so as to implement calibration of the target link.

That is to say, in the embodiment of the present disclosure, a high-frequency link with a frequency band higher than an intermediate-frequency band may be set as a target link, and calibration of the high-frequency link is implemented by acquiring a calibration to-be-measured signal sent by the high-frequency link and combining the acquired intermediate-frequency reference signal.

In some embodiments, the acquiring of the calibration to-be-detected signal may be adjusting the distance between probes in a microwave dark box in the millimeter wave active antenna unit AAU link calibration system shown in fig. 2 and adjusting the mode of the scanning frame to be an X-axis step mode or a Y-axis step mode according to the layout of the antenna array of the millimeter wave active antenna unit AAU, as shown in fig. 3a and fig. 3b, where fig. 3a is a schematic diagram of an X-axis step scanning mode in the embodiment of the present disclosure, and fig. 3b is a schematic diagram of a Y-axis step scanning mode in the embodiment of the present disclosure.

S104: and determining a calibration compensation value corresponding to the signal to be calibrated according to the intermediate frequency reference signal, wherein the calibration compensation value is used for calibrating the target link.

After the calibration to-be-detected signal is obtained, a calibration compensation value corresponding to the calibration to-be-detected signal can be determined according to the obtained intermediate frequency reference signal, and the calibration compensation value can be used for performing calibration compensation on the target link so as to realize calibration of the target link.

In some embodiments, the calibration compensation value corresponding to the calibration signal is determined according to the intermediate frequency reference signal, which may be performing difference processing on a signal parameter corresponding to the calibration to-be-detected signal and a signal parameter corresponding to the intermediate frequency reference signal to obtain a signal parameter difference value, and using the obtained signal parameter difference value as the calibration compensation value, which is not limited herein.

For example, the signal amplitude value and the phase value of the intermediate frequency reference signal may be determined respectively, the signal amplitude value and the phase value of the calibration to-be-detected signal may be determined, the amplitude difference between the calibration to-be-detected signal and the intermediate frequency reference signal and the phase difference between the calibration to-be-detected signal and the intermediate frequency reference signal may be determined respectively, and the amplitude difference and the phase difference are used together as a calibration compensation value corresponding to the calibration to-be-detected signal, which is not limited to this.

For an explanation on calibration of the target link according to the calibration compensation value, reference may be specifically made to the explanation of the following embodiments, which are not described herein again.

In this embodiment, an intermediate frequency link is determined, where the intermediate frequency link corresponds to an intermediate frequency band, the intermediate frequency link is calibrated to obtain an intermediate frequency reference signal, and a calibration signal to be measured is obtained, where the calibration signal to be measured is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band, and then a calibration compensation value corresponding to the calibration signal to be measured is determined according to the intermediate frequency reference signal, where the calibration compensation value is used to calibrate the target link, so that convenience in calibrating the millimeter wave active antenna unit AAU link can be effectively improved, calibration efficiency of the millimeter wave active antenna unit AAU link is effectively improved, calibration accuracy of the millimeter wave active antenna unit AAU link is effectively improved, construction cost of an AAU link calibration system is effectively reduced, and the system is suitable for large-scale production line deployment.

Fig. 4 is a flowchart illustrating a link calibration method according to another embodiment of the disclosure.

As shown in fig. 4, the link calibration method includes:

s401: and determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band.

For the description of S401, reference may be made to the foregoing embodiments, which are not described herein again.

S402: a plurality of reference compensation values corresponding to the plurality of intermediate frequency links, respectively, are determined.

After the intermediate frequency links are determined, a plurality of reference compensation values corresponding to the plurality of intermediate frequency links, respectively, may be determined.

The reference value for compensating each if link may be referred to as a reference compensation value.

In some embodiments, the determining the reference compensation values corresponding to the multiple intermediate frequency links may be determining multiple signal parameter values corresponding to the multiple intermediate frequency links, and determining multiple reference compensation values corresponding to the multiple intermediate frequency links by combining the multiple signal parameter values corresponding to the multiple intermediate frequency links, which is not limited in this respect.

S403: and generating an intermediate frequency reference signal according to the plurality of reference compensation values.

After the reference compensation values respectively corresponding to the intermediate frequency links are obtained, link compensation can be performed according to the reference compensation values to generate the intermediate frequency reference signal, and the intermediate frequency reference signal is generated according to the reference compensation values corresponding to the intermediate frequency links, so that the generation effect of the intermediate frequency reference signal can be effectively guaranteed while the applicability of the intermediate frequency reference signal generation method is effectively improved, and when the reference intermediate frequency reference signal assists in calibrating the target link, the reference value of the reference intermediate frequency signal can be effectively improved, thereby improving the calibration effect on the target link to a greater extent.

S404: and acquiring a calibration to-be-detected signal, wherein the calibration to-be-detected signal is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band.

For the description of S404, reference may be made to the foregoing embodiments, which are not described herein again.

S405: and acquiring a local oscillation signal provided by the millimeter wave active antenna unit AAU.

When the calibration to-be-detected signal output by the high-frequency link in the millimeter wave active antenna unit AAU is obtained, the local oscillation signal provided by the millimeter wave active antenna unit AAU can be obtained together.

S406: and performing down-conversion processing on the calibration to-be-detected signal and the local oscillator signal to obtain a target to-be-detected signal.

After the local oscillator signal and the calibration to-be-detected signal provided by the millimeter wave active antenna unit AAU are obtained, the calibration to-be-detected signal and the local oscillator signal may be down-converted to obtain a down-converted signal, which may be referred to as a target to-be-detected signal.

In this embodiment, the calibration signal to be detected and the local oscillator signal may be input into the frequency conversion module shown in fig. 2, and the frequency conversion module performs down conversion processing on the calibration signal to be detected and the local oscillator signal, that is, the target frequency band corresponding to the calibration signal to be detected is moved to the intermediate frequency band, so as to obtain the target signal to be detected whose frequency band is the intermediate frequency band.

S407: and determining a signal parameter value corresponding to the target signal to be detected according to the intermediate frequency reference signal.

After the calibration to-be-detected signal and the local oscillator signal are down-converted to obtain the target to-be-detected signal, a signal parameter value corresponding to the target to-be-detected signal may be determined according to the intermediate frequency reference signal, where the signal parameter value may be used to describe a signal parameter corresponding to the target to-be-detected signal, and the signal parameter may be, for example, a signal amplitude, a signal phase, or the like, which is not limited thereto.

In this embodiment, the signal parameter value corresponding to the target signal to be measured is determined according to the intermediate frequency reference signal, the target signal to be measured may be input into Port2 of the vector network analyzer shown in fig. 2, at this time, the vector network analyzer is connected with the intermediate frequency reference signal and the signal to be measured for calibration, and the 10M synchronization signal provided by the BBU, at this time, the scanning frame may be controlled to scan and measure different array elements of the millimeter wave AAU antenna array one by one to obtain amplitude data and phase data of the high frequency link corresponding to the different array elements of the millimeter wave AAU antenna array, after the amplitude data and phase data of the high frequency link are obtained, the amplitude data and phase data of the high frequency link and amplitude data and phase data of the probe and the switch box stored in the preprocessing process may be correspondingly subtracted to obtain actual amplitude data and phase data of the high frequency link, and the actual amplitude data and phase data of the high frequency link are used as the signal parameter value corresponding to the target signal to be measured.

S408: and determining a calibration compensation value according to the signal parameter value.

After the signal parameter value corresponding to the target signal to be measured is determined according to the intermediate frequency reference signal, the calibration compensation value can be determined according to the signal parameter value.

In some embodiments, the calibration compensation value is determined according to the signal parameter value, which may be obtained by correspondingly subtracting the amplitude value and the phase value of the target signal to be measured output by the target link q from the amplitude values and the phase values of the signals output by the other links T to obtain a corresponding amplitude difference value and a corresponding signal difference value, and taking the amplitude difference value and the phase difference value as the calibration compensation value, where the specific calculation manner is as follows:

ΔI＝I _T –I _q

wherein, the Delta I is the amplitude difference value,

is the phase difference value.

After the corresponding amplitude difference value and phase difference value are calculated according to the signal parameter values and are used as the calibration compensation values, the calibration compensation can be performed on the target link according to the calibration compensation values, for example, amplitude and phase calibration factors can be used according to the calibration compensation values

And compensating the target link to realize the calibration of the target link.

Therefore, in this embodiment, by obtaining the local oscillator signal provided by the millimeter wave active antenna unit AAU, and performing down-conversion processing on the calibration to-be-detected signal and the local oscillator signal to obtain the target to-be-detected signal, then according to the intermediate frequency reference signal, determining a signal parameter value corresponding to the target to-be-detected signal, and according to the signal parameter value, determining the calibration compensation value, the technical problem that the local oscillator signal introduces a random phase, which results in that the compensation value cannot be effectively obtained, can be effectively solved, the accuracy of the calibration compensation value is effectively ensured, and therefore, the link calibration effect can be effectively improved based on the calibration compensation value.

In this embodiment, after the intermediate frequency link and the plurality of reference compensation values corresponding to the plurality of intermediate frequency links are determined, the intermediate frequency reference signal may be generated according to the plurality of reference compensation values, and the intermediate frequency reference signal may be generated according to the plurality of reference compensation values corresponding to the intermediate frequency links, so that the applicability of the intermediate frequency reference signal generation method may be effectively improved, and meanwhile, the generation effect of the intermediate frequency reference signal may be effectively ensured, and when the target link is calibrated by referring to the intermediate frequency reference signal, the reference value of the reference intermediate frequency signal may be effectively improved, so that the calibration effect for the target link may be greatly improved, and then the signal to be calibrated may be acquired.

Fig. 5 is a flowchart illustrating a link calibration method according to another embodiment of the disclosure.

As shown in fig. 5, the link calibration method includes:

s501: and determining an intermediate frequency link, wherein the intermediate frequency link corresponds to an intermediate frequency band.

For the description of S501, reference may be made to the foregoing embodiments, and details are not repeated here.

S502: an intermediate frequency reference link is determined from the plurality of intermediate frequency links, wherein the intermediate frequency reference link corresponds to the reference sequence signal.

The intermediate frequency link used for calibration reference of the intermediate frequency link may be referred to as an intermediate frequency reference link, and the intermediate frequency reference link belongs to a plurality of intermediate frequency links.

After determining the plurality of if chains, an if reference chain may be determined from the plurality of if chains, and the if reference chain may have a corresponding signal, which may be referred to as a reference sequence signal.

In some embodiments, one or more if links may be randomly selected from the plurality of if links and used as the if reference link, which is not limited herein.

S503: and starting the current intermediate frequency link and closing other intermediate frequency links, wherein the current intermediate frequency link and the other intermediate frequency links jointly form a plurality of intermediate frequency links.

The intermediate frequency link to be calibrated currently may be referred to as a current intermediate frequency link, and accordingly, the intermediate frequency lines other than the current intermediate frequency link in the plurality of intermediate frequency links may be referred to as other intermediate frequency links, and the other intermediate frequency links may form a plurality of intermediate frequency links together with the current intermediate frequency link.

In this embodiment, in order to acquire a signal output by the current intermediate frequency link, the current intermediate frequency link may be opened, and other intermediate frequency links may be closed, so that interference of the other intermediate frequency links on the current intermediate frequency link may be minimized in the signal acquisition process, and thus, the signal acquisition effect may be effectively ensured.

S504: and acquiring a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link to be calibrated currently in a plurality of intermediate frequency links.

After the current if link is opened and the other if links are closed, a signal output by the current if link may be obtained, and the signal may be referred to as a calibration sequence signal.

In this embodiment, the obtaining of the calibration sequence signal output by the current intermediate frequency link may be opening any intermediate frequency link in the current intermediate frequency link, and closing other intermediate frequency links in the current intermediate frequency link to obtain the calibration sequence signal output by the intermediate frequency link, and sequentially opening all intermediate frequency links in the current intermediate frequency link according to the method to obtain a plurality of calibration sequence signals output by the current intermediate frequency link.

S505: a signal parameter difference between the calibration sequence signal and the reference sequence signal is determined.

After the calibration sequence signal output by the current intermediate frequency link is obtained, signal parameter values respectively corresponding to the calibration sequence signal and the reference sequence signal may be determined, and the signal parameter values may specifically be, for example, a signal amplitude value, a signal phase value, and the like, which is not limited herein.

For example, the calibration sequence signal obtained as described above may be input into a coupling network as shown in fig. 6 (fig. 6 is a schematic diagram of the calibration of the intermediate frequency link according to the embodiment of the present disclosure), the attenuation and phase shift of each port of the coupling network are the same, the calibration sequence signal is coupled to the calibration channel through the coupling network, in the process, the corresponding signal amplitude value and the signal phase value are recorded, and the recorded signal amplitude value and signal phase value are used as the signal parameter values corresponding to the calibration sequence signal and the reference sequence signal.

Further, after determining the signal parameter values corresponding to the calibration sequence signal and the reference sequence signal, the signal parameter difference between the calibration sequence signal and the reference sequence signal may be determined according to the signal parameter values, and the signal parameter difference may specifically be, for example, a signal amplitude difference and a phase difference between the calibration sequence signal and the reference sequence signal, which is not limited herein.

In this embodiment, a specific calculation method for determining a signal parameter difference between the calibration sequence signal and the reference sequence signal is as follows:

ΔI _m ＝I _Tm –I _p

wherein, delta I _m May be used to represent the amplitude difference between the calibration sequence signal and the reference sequence signal,

can be used to represent the phase difference between the calibration sequence signal and the reference sequence signal, P represents the reference sequence signal and Tm represents the calibration sequence signal.

S506: and determining a reference compensation value corresponding to the current intermediate frequency link according to the signal parameter difference.

After the amplitude difference value and the phase difference value between the calibration sequence signal and the reference sequence signal are determined, the reference compensation value corresponding to the current intermediate frequency link can be determined according to the signal parameter difference value.

In this embodiment, the reference compensation value corresponding to the current intermediate frequency link may be obtained by calculation according to the signal parameter difference, and the specific calculation manner is as follows:

wherein, C _p Indicating a reference compensation value corresponding to the current if link.

S507: and updating the current intermediate frequency link to obtain a plurality of reference compensation values respectively corresponding to the intermediate frequency links.

In this embodiment, an intermediate frequency reference link is determined from a plurality of intermediate frequency links, where the intermediate frequency reference link corresponds to a reference sequence signal, and a calibration sequence signal output by a current intermediate frequency link is obtained, where the current intermediate frequency link is an intermediate frequency link to be calibrated currently in the plurality of intermediate frequency links, the current intermediate frequency link belongs to the plurality of intermediate frequency links, a signal parameter difference between the calibration sequence signal and the reference sequence signal is determined, a reference compensation value corresponding to the current intermediate frequency link is determined according to the signal parameter difference, and the current intermediate frequency link is updated to obtain a plurality of reference compensation values respectively corresponding to the plurality of intermediate frequency links, so that flexibility of the reference compensation value determination method can be effectively improved, practicality of the reference compensation value determination method is effectively improved, and accuracy of the reference compensation value can be greatly ensured.

S508: and respectively calibrating the plurality of intermediate frequency links according to the plurality of reference compensation values to obtain a plurality of calibrated intermediate frequency links.

After the reference compensation value corresponding to the current intermediate frequency link is determined according to the signal parameter difference, the plurality of intermediate frequency links may be calibrated according to the plurality of reference compensation values, so as to obtain a plurality of calibrated intermediate frequency links.

That is to say, after the reference compensation value corresponding to the current intermediate frequency link is determined, amplitude compensation and phase compensation may be performed on the intermediate frequency link according to the reference compensation value, so as to calibrate the intermediate frequency link, and obtain a plurality of calibrated intermediate frequency links.

S509: and acquiring a plurality of target sequence signals respectively output by the calibrated intermediate frequency links.

After the calibration of the intermediate frequency link is completed and a plurality of calibrated intermediate frequency links are obtained, a plurality of signals respectively output by the plurality of calibrated intermediate frequency links can be obtained, and the signals can be referred to as target sequence signals.

S510: and generating an intermediate frequency reference signal according to the plurality of target sequence signals.

After obtaining the plurality of target sequence signals respectively output by the plurality of calibrated intermediate frequency links, the intermediate frequency reference signal may be generated according to the plurality of target sequence signals.

Optionally, in some embodiments, the intermediate frequency reference signal is generated according to a plurality of target sequence signals, the plurality of target sequence signals may be coupled to obtain the intermediate frequency reference signal, and the plurality of target sequence signals are coupled to obtain the intermediate frequency reference signal, so that accuracy of the intermediate frequency reference signal can be effectively guaranteed, and therefore, the link calibration accuracy can be effectively assisted to be improved based on the intermediate frequency reference signal.

For example, a plurality of target sequence signals respectively Output by a plurality of calibrated intermediate frequency links may be input into the coupling network shown in fig. 6, after the coupling network performs coupling processing on the plurality of target sequence signals, the coupling network may Output a corresponding intermediate frequency signal through a Test Output Port, and simultaneously input the intermediate frequency signal into Port1 of a vector network analyzer to assist in calibrating the target links, where the intermediate frequency signal may be referred to as an intermediate frequency reference signal.

S511: and acquiring a calibration to-be-detected signal, wherein the calibration to-be-detected signal is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band.

S512: and determining a calibration compensation value corresponding to the signal to be calibrated according to the intermediate frequency reference signal, wherein the calibration compensation value is used for calibrating the target link.

For the description of S511-S512, reference may be made to the above embodiments, which are not described herein again.

In this embodiment, by determining the intermediate frequency link, determining the intermediate frequency reference link from the plurality of intermediate frequency links, then opening the current intermediate frequency link, and closing the other intermediate frequency links, and by determining the intermediate frequency reference link from the plurality of intermediate frequency links, where the intermediate frequency reference link corresponds to the reference sequence signal, and acquiring the calibration sequence signal output by the current intermediate frequency link, then determining the signal parameter difference between the calibration sequence signal and the reference sequence signal, and determining the reference compensation value corresponding to the current intermediate frequency link according to the signal parameter difference, the flexibility of the reference compensation value determination method can be effectively improved, the practicability of the reference compensation value determination method can be effectively improved, and the accuracy of the reference compensation value can be greatly ensured. The calibration method comprises the steps of calibrating a plurality of intermediate frequency links according to a plurality of reference compensation values to obtain a plurality of calibrated intermediate frequency links, obtaining a plurality of target sequence signals output by the plurality of calibrated intermediate frequency links respectively, generating intermediate frequency reference signals according to the plurality of target sequence signals, obtaining calibration signals to be detected, and determining calibration compensation values corresponding to the calibration signals to be detected according to the intermediate frequency reference signals, wherein the calibration compensation values are used for calibrating the target links, so that the calibration convenience of the millimeter wave active antenna unit AAU links can be effectively improved, the calibration efficiency of the millimeter wave active antenna unit AAU links is effectively improved, and the calibration precision of the millimeter wave active antenna unit AAU links is effectively improved.

To sum up, the embodiment of the present disclosure provides a 5G millimeter wave antenna unit AAU link calibration method, which can effectively improve the beamforming capability of the 5G millimeter wave antenna unit AAU, and has the following advantages compared with the existing link calibration method:

(1) The invention adopts a method of combining point-to-point alignment and internal and external (air interface) calibration, can calibrate the whole link of the 5G millimeter wave antenna unit AAU, can effectively reduce the calibration error introduced by the edge effect of the antenna array surface, and has the advantages of long calibration link and high calibration precision compared with the prior art.

(2) Compared with the complex process of a rotation vector method, the method has the advantages of convenience, rapidness, short time consumption and high efficiency, and is more suitable for large-scale deployment of a production line.

(3) According to the invention, the problem of amplitude and phase calibration of the 5G millimeter wave antenna unit AAU is converted into an intermediate frequency (Sub-6G) frequency band by adopting a down-conversion method, so that the system construction cost can be greatly reduced, the system is more suitable for large-scale deployment of a production line with low cost, and the industrial problem is solved.

Fig. 7 is a schematic structural diagram of a link calibration apparatus according to an embodiment of the disclosure.

As shown in fig. 7, the link calibration apparatus 70 includes:

a first determining unit 701, configured to determine an intermediate frequency link, where the intermediate frequency link corresponds to an intermediate frequency band;

a calibration unit 702, configured to perform calibration processing on an intermediate frequency link to obtain an intermediate frequency reference signal;

an obtaining unit 703 is configured to obtain a calibration to-be-detected signal, where the calibration to-be-detected signal is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band;

a second determining unit 704, configured to determine a calibration compensation value corresponding to the calibration signal to be measured according to the intermediate frequency reference signal, where the calibration compensation value is used to calibrate the target link.

In some embodiments of the present disclosure, the second determining unit 704 is specifically configured to:

In some embodiments of the present disclosure, the number of the if links is multiple, and the calibration unit 702 is specifically configured to:

In some embodiments of the present disclosure, the calibration unit 702 is further configured to:

In some embodiments of the present disclosure, the number of target links is plural, and the link calibration apparatus 70 further includes:

the starting unit 705 is configured to, before acquiring a signal to be calibrated, start a current target link and close other target links, where the current target link is a target link to be calibrated currently, and the current target link and the other target links jointly form a plurality of target links.

It should be noted that the apparatus provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

It should be noted that, the division of the units in the embodiment of the present disclosure is schematic, and is only one logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functioning unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium.

Based on such understanding, the technical solution of the present disclosure 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, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

In this embodiment, an intermediate frequency link is determined, where the intermediate frequency link corresponds to an intermediate frequency band, the intermediate frequency link is calibrated to obtain an intermediate frequency reference signal, and a calibration to-be-detected signal is obtained, where the calibration to-be-detected signal is associated with a target link corresponding to an active antenna unit AAU of millimeter waves, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band, and then a calibration compensation value corresponding to the calibration to-be-detected signal is determined according to the intermediate frequency reference signal, where the calibration compensation value is used to calibrate the target link, so that convenience in calibrating the active antenna unit AAU of millimeter waves can be effectively improved, calibration efficiency of the active antenna unit AAU of millimeter waves can be effectively improved, calibration accuracy of the active antenna unit AAU of millimeter waves can be effectively improved, construction cost of an AAU link calibration system of the active antenna unit of millimeter waves can be effectively reduced, and the system is suitable for large-scale deployment of a production line.

Referring to fig. 8, the link calibration apparatus 80 includes a memory 801, a transceiver 802, a processor 803, and a user interface 804: a memory 801 for storing a computer program; a transceiver 802 for transceiving data under the control of the processor 803; a processor 803 for reading the computer program in the memory 801 and performing the following operations:

Wherein in fig. 8 the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 803 and various circuits represented by memory 801 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 802 may be a plurality of elements including a transmitter and receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The user interface 804 may also be an interface capable of interfacing externally to a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 803 is responsible for managing the bus architecture and general processing, and the memory 801 may store data used by the processor 800 in performing operations.

Optionally, the processor 803 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor may also have a multi-core architecture.

The processor is used for executing any method provided by the embodiment of the disclosure according to the obtained executable instructions by calling the computer program stored in the memory. The processor and memory may also be physically separated.

In some embodiments of the present disclosure, the processor 803 is specifically configured to:

acquiring a local oscillation signal provided by the millimeter wave active antenna unit AAU;

performing down-conversion processing on the calibration to-be-detected signal and the local oscillator signal to obtain a target to-be-detected signal;

determining a signal parameter value corresponding to the target signal to be detected according to the intermediate frequency reference signal;

and determining the calibration compensation value according to the signal parameter value.

In some embodiments of the disclosure, the number of the if links is multiple, and the processor 803 is specifically configured to:

and generating the intermediate frequency reference signal according to the plurality of reference compensation values.

acquiring a plurality of target sequence signals respectively output by the calibrated intermediate frequency links;

and generating the intermediate frequency reference signal according to the plurality of target sequence signals.

and coupling the target sequence signals to obtain the intermediate frequency reference signal.

determining an intermediate frequency reference link from the plurality of intermediate frequency links, wherein the intermediate frequency reference link corresponds to a reference sequence signal;

acquiring a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link to be calibrated currently in the plurality of intermediate frequency links;

before the calibration sequence signal output by the current intermediate frequency link is obtained, the current intermediate frequency link is opened, and other intermediate frequency links are closed, wherein the current intermediate frequency link and the other intermediate frequency links jointly form the plurality of intermediate frequency links.

before the calibration to-be-detected signal is acquired, a current target link is opened, and other target links are closed, wherein the current target link is a target link to be calibrated currently, and the current target link and the other target links jointly form a plurality of target links.

In order to achieve the above embodiments, the embodiments of the present disclosure propose a processor-readable storage medium storing a computer program for causing a processor to execute a link calibration method.

As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications can be made in the present disclosure without departing from the spirit and scope of the disclosure. Thus, if such modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such modifications and variations as well.

It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present disclosure, "a plurality" means two or more unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present disclosure includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.

It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present disclosure may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.

Claims

1. A link calibration method, applied to a millimeter wave Active Antenna Unit (AAU), the method comprising:

2. The method of claim 1, wherein said determining a calibration compensation value corresponding to the calibration signal-under-test from the intermediate frequency reference signal comprises:

3. The method of claim 1, wherein the number of the if chains is plural, and the calibrating the if chains to obtain the if reference signal comprises:

4. The method of claim 3, wherein said generating the intermediate frequency reference signal based on the plurality of reference compensation values comprises:

5. The method of claim 4, wherein said generating the intermediate frequency reference signal from the plurality of target sequence signals comprises:

6. The method of claim 3, wherein determining a plurality of reference compensation values corresponding to the plurality of intermediate frequency links, respectively, comprises:

acquiring a calibration sequence signal output by a current intermediate frequency link, wherein the current intermediate frequency link is an intermediate frequency link to be calibrated currently in the intermediate frequency links;

7. The method of claim 6, wherein prior to said obtaining the calibration sequence signal of the current intermediate frequency link output, further comprising:

and starting the current intermediate frequency link and closing other intermediate frequency links, wherein the current intermediate frequency link and the other intermediate frequency links jointly form the plurality of intermediate frequency links.

8. The method of claim 1, wherein the number of target links is plural, and further comprising, prior to said acquiring the calibration signal under test:

the method comprises the steps of starting a current target link and closing other target links, wherein the current target link is a target link to be calibrated currently, and the current target link and the other target links jointly form a plurality of target links.

9. A link calibration apparatus for use with a millimeter wave Active Antenna Unit (AAU), the apparatus comprising:

the device comprises a first determining unit, a second determining unit and a control unit, wherein the first determining unit is used for determining an intermediate frequency link, and the intermediate frequency link corresponds to an intermediate frequency band;

the calibration unit is used for calibrating the intermediate frequency link to obtain an intermediate frequency reference signal;

an obtaining unit, configured to obtain a calibration to-be-detected signal, where the calibration to-be-detected signal is associated with a target link corresponding to the millimeter wave active antenna unit AAU, the target link corresponds to a target frequency band, and the target frequency band is higher than the intermediate frequency band;

a second determining unit, configured to determine, according to the intermediate frequency reference signal, a calibration compensation value corresponding to the calibration to-be-detected signal, where the calibration compensation value is used to calibrate the target link.

10. The apparatus of claim 9, wherein the second determining unit is specifically configured to:

11. The apparatus according to claim 9, wherein the number of if chains is plural, and the calibration unit is specifically configured to:

12. The apparatus of claim 11, wherein the calibration unit is further configured to:

13. The apparatus of claim 12, wherein the calibration unit is further configured to:

14. The apparatus of claim 11, wherein the calibration unit is further configured to:

15. The apparatus of claim 14, wherein the calibration unit is further configured to:

16. The apparatus of claim 9, wherein the number of target links is plural, further comprising:

and the starting unit is used for starting a current target link and closing other target links before the calibration to-be-detected signal is acquired, wherein the current target link is a current target link to be calibrated, and the current target link and the other target links jointly form a plurality of target links.

17. A link calibration device, comprising a memory, a transceiver, a processor: a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

18. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to perform the method of any one of claims 1 to 8.