CN114285509A - AAU group delay fluctuation compensation method, device, electronic equipment and storage medium - Google Patents
AAU group delay fluctuation compensation method, device, electronic equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the invention relates to the technical field of communication, and discloses an AAU group delay fluctuation compensation method, which comprises the following steps: acquiring a first reference signal sent by an AAU to a signal receiving device and a second reference signal generated by the signal receiving device; determining a phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal; and compensating the group delay fluctuation of the AAU according to the phase value. The embodiment of the invention also discloses an AAU group delay fluctuation compensation device, electronic equipment and a storage medium. The AAU group delay fluctuation compensation method, the AAU group delay fluctuation compensation device, the electronic equipment and the storage medium provided by the embodiment of the invention can effectively improve the AAU group delay fluctuation without changing the design of AAU hardware and increasing the cost of hardware design.
Description
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to an AAU group delay fluctuation compensation method, an AAU group delay fluctuation compensation device, an electronic device and a storage medium.
Background
Active Antenna Unit (AAU) is the main equipment of 5G base station, and is an implementation of large-scale Antenna array. The AAU may be regarded as a combination of a Radio Remote Unit (RRU) and an antenna, integrating a plurality of radio frequency transceiver (T/R) units.
With the rapid development of wireless communication technology, the communication system is continuously upgraded, and the signal bandwidth becomes wider and wider. The widening of the signal bandwidth affects some indexes of the AAU hardware design, such as an in-band group delay fluctuation index, and the wider the signal bandwidth, the worse the group delay fluctuation index. In the signal transmission process, if the group delay fluctuation is large, the AAU signal quality will be deteriorated.
The group delay fluctuation caused in the AAU hardware link is mainly caused by the filter, because the small in-band group delay is a difficult point in the design of the filter. The traditional method for improving the delay fluctuation of the filter group at present is to add a delay equalizer on a hardware link of the AAU. However, adding a delay equalizer to the hardware link requires a hardware design change, which increases the cost of the hardware design.
Disclosure of Invention
The main objective of the embodiments of the present application is to provide a method and an apparatus for compensating AAU group delay fluctuation, an electronic device, and a storage medium, which can effectively improve AAU group delay fluctuation without changing the design of AAU hardware and increasing the cost of hardware design.
In order to achieve the above object, an embodiment of the present application provides an AAU group delay fluctuation compensation method, including: acquiring a first reference signal sent by an AAU to a signal receiving device and a second reference signal generated by the signal receiving device; determining a phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal; and compensating the group delay fluctuation of the AAU according to the phase value.
In order to achieve the above object, an embodiment of the present application further provides an AAU group delay fluctuation compensation apparatus, including: the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a first reference signal sent by an AAU to a signal receiving device and a second reference signal generated by the signal receiving device; a determining module, configured to determine a phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal; and the compensation module is used for compensating the group delay fluctuation of the AAU according to the phase value.
In order to achieve the above object, an embodiment of the present application further provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described AAU group delay fluctuation compensation method.
To achieve the above object, an embodiment of the present application further provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the above-mentioned AAU group delay fluctuation compensation method.
Compared with the prior art, the embodiment of the invention determines the phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal which are sent to the signal receiving device by the AAU and the second reference signal which is generated by the signal receiving device, compensates the AAU group delay fluctuation according to the phase value of the AAU group delay fluctuation, can effectively improve the AAU group delay fluctuation, does not need to change the hardware design of the AAU, and does not increase the cost of the AAU hardware design; meanwhile, the hardware design of the AAU does not need to be changed, so that other indexes of the AAU hardware link can be ensured not to be influenced.
Drawings
One or more embodiments are illustrated by the corresponding figures in the drawings, which are not meant to be limiting.
Fig. 1 is a schematic flow chart of an AAU group delay fluctuation compensation method according to a first embodiment of the present invention;
fig. 2 is a schematic flow chart of the refinement step of S102 in the AAU group delay fluctuation compensation method according to the first embodiment of the present invention;
fig. 3 is a schematic diagram of a schematic structure of group delay fluctuation compensation performed by an AAU in the prior art;
fig. 4 is a diagram illustrating an example of a practical application of the AAU group delay fluctuation compensation method according to the first embodiment of the present invention;
fig. 5 is a schematic flow chart of an AAU group delay fluctuation compensation method according to a second embodiment of the present invention;
fig. 6 is a schematic structural example of an AAU group delay fluctuation compensation method according to a second embodiment of the present invention;
fig. 7 is a flowchart illustrating group delay fluctuation detection performed by an AAU group delay fluctuation compensation method according to a second embodiment of the present invention;
fig. 8 is a flowchart illustrating group delay fluctuation compensation performed by the AAU group delay fluctuation compensation method according to the second embodiment of the present invention;
fig. 9 is a schematic block diagram of an AAU group delay fluctuation compensation apparatus according to a third embodiment of the present invention;
fig. 10 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.
The first embodiment of the present invention relates to an AAU group delay fluctuation compensation method, which includes acquiring a first reference signal sent by an AAU to a signal receiving device and a second reference signal generated by the signal receiving device, determining a phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal, and compensating the AAU group delay fluctuation according to the phase value. The group delay fluctuation of the AAU is compensated by the phase values determined by the two reference signals, the group delay fluctuation of the AAU can be effectively improved, the hardware design of the AAU does not need to be changed, and the cost of the hardware design of the AAU is not increased.
The specific flow of the AAU group delay fluctuation compensation method provided by the embodiment of the present invention is shown in fig. 1, and specifically includes the following steps:
s101: and acquiring a first reference signal sent by the AAU to the signal receiving device and a second reference signal generated by the signal receiving device.
The signal receiving device may be a device with ideal group delay fluctuation or known group delay fluctuation parameters of the radio frequency link, and the ideal group delay fluctuation refers to small group delay fluctuation or no group delay fluctuation. The ideal signal receiving device using the group delay fluctuation is used for determining the group delay fluctuation of the AAU, and the inaccurate result caused by the group delay fluctuation of the signal receiving device is avoided. And the device with the known radio frequency chain group delay fluctuation parameter can exclude the group delay fluctuation of the signal receiving device when determining the group delay fluctuation of the AAU, thereby obtaining a more accurate result. Alternatively, the signal receiving apparatus may use a device such as a spectrometer, and the specific used device is not limited specifically here.
It is understood that the Signal sent by the AAU includes various signals, some of which may be used to determine the phase value of the AAU group delay fluctuation, and an appropriate Signal may be selected as a first Reference Signal of the AAU, for example, a CSI-RS (Channel State Information-Reference Signal) Signal, which is not limited herein. The second reference signal corresponds to the signal type of the first reference signal, that is, if the first reference signal of the AAU is the a signal, the second reference signal generated by the signal receiving apparatus is also the a signal.
In a specific example, S101 may specifically be: a demodulation reference signal (DMRS) transmitted by the AAU to the signal receiving device is acquired as a first reference signal, and a demodulation reference signal generated by the signal receiving device is acquired as a second reference signal.
Alternatively, in order to ensure that the reception of signals between the AAU and the signal receiving device is not interfered by other signals, the AAU and the signal receiving device may be connected by a synchronization cable, because the synchronization cable may effectively shield the other signals. In addition, in order to effectively determine the phase value of the AAU group delay fluctuation, when acquiring the second reference signal, it may be to acquire the second reference signal generated at the same time as the first reference signal. Of course, after the second reference signal is collectively acquired for a period of time, the second reference signal at the same time as the first reference signal may be determined and acquired according to the time point. Alternatively, the first reference signal and the second reference signal may be signals of a plurality of time points.
S102: and determining the phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal.
In a specific example, as shown in fig. 2, determining the phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal may specifically include the following steps:
s1021: and Fourier transforming the first reference signal of each time slot.
S1022: and carrying out conjugate multiplication on the first reference signal subjected to Fourier transform and a second reference signal corresponding to the time slot to obtain a group of complex numbers.
S1023: the average of the complex set is calculated.
S1024: and subtracting the average value of each complex value in the complex group from the average value of the complex group, and obtaining the phase value of each time slot according to the subtraction result.
S1025: and determining the phase value of the AAU group delay fluctuation according to the phase value of each time slot.
Specifically, a first reference signal of each time slot in an AAU frame is subjected to Fourier transform, and the transformed first reference signal is subjected to conjugate multiplication with a second reference signal corresponding to the time slot of the first reference signal to obtain a group of complex groups; then calculating the average value of the complex group, subtracting the average value of the complex group from each complex value in the complex group, calculating the phase value of each time slot according to the subtraction result, and determining the phase value of the time slot contained in one frame of the AAU after calculating the phase value of the time slot contained in the AAU.
For example, if an AAU frame includes 20 slots (0-19 slots), when calculating the phase value of the 0 th slot, fourier transforming the first reference signal of the 0 th slot, and conjugate-multiplying the transformed first reference signal with the second reference signal corresponding to the 0 th slot to obtain a set of complex numbers (including N complex numbers); then calculating the average value of the complex number group, subtracting the calculated average value from each complex number value in the complex number group, and calculating the phase value of the 0 th time slot according to the subtraction result; and similarly, the phase values of the 1 st to 19 th time slots are calculated, and the phase value of the AAU group delay fluctuation can be obtained.
Optionally, as mentioned above, the first reference signal and the second reference signal may be demodulation reference signals, CSI-RS, or other signals, and may be selected according to actual needs, which is not limited herein.
S103: and compensating the group delay fluctuation of the AAU according to the phase value of the AAU group delay fluctuation.
In a specific example, S103 may specifically be: and forming a group delay calibration file according to the phase value of the AAU group delay fluctuation, and performing phase compensation on the OFDM (orthogonal frequency division multiplexing) modulated signal in the AAU according to the group delay calibration file.
It can be understood that, since the AAU group delay fluctuation is determined by the hardware itself (e.g., the included filter), after the phase value of the AAU group delay fluctuation is obtained, the AAU group delay fluctuation can be compensated according to the obtained phase value, so that a corresponding group delay calibration file can be formed, and then the AAU group delay fluctuation can be compensated according to the group delay calibration file.
Alternatively, in practical applications, when compensating the group delay fluctuation of the AAU according to the phase value of the group delay fluctuation of the AAU, the compensation may be performed after the OFDM-modulated signal in the AAU and before IFFT (inverse fast fourier transform) of the AAU.
Referring to fig. 3, which is a schematic diagram illustrating a schematic structure of group delay fluctuation compensation performed by an AAU in the prior art, it can be seen from fig. 3 that the problem of group delay fluctuation is solved by adding a delay equalizer to the AAU. However, since adding a delay equalizer to the AAU changes the hardware design of the AAU, the cost of the hardware design is increased; meanwhile, the addition of the delay equalizer may also cause deterioration of other radio indicators of the AAU, such as in-band insertion loss and out-of-band rejection indicators; in addition, the delay equalizer is added to passively reduce the group delay through hardware design, and the problem of fluctuation of the in-band group delay cannot be fundamentally solved.
Please refer to fig. 4, which is a diagram illustrating an example of a practical application of the AAU group delay fluctuation compensation method according to an embodiment of the present invention. It should be understood that the group delay fluctuation phase compensation in fig. 4 does not require hardware, and can be implemented by using a software method, so that the hardware design of the AAU does not need to be changed, and the cost of the hardware design of the AAU is not increased; meanwhile, the hardware design of the AAU does not need to be changed, so that other indexes of the AAU hardware link can be ensured not to be influenced.
According to the AAU group delay fluctuation compensation method provided by the embodiment of the invention, the first reference signal sent by the AAU to the signal receiving device and the second reference signal generated by the signal receiving device are obtained, the phase value of the AAU group delay fluctuation is determined according to the first reference signal and the second reference signal, and the group delay fluctuation of the AAU is compensated according to the phase value, so that the AAU group delay fluctuation can be effectively improved, the hardware design of the AAU does not need to be changed, and the cost of the AAU hardware design is not increased; meanwhile, the hardware design of the AAU does not need to be changed, so that other indexes of the AAU hardware link can be ensured not to be influenced.
A second embodiment of the present invention relates to an AAU group delay fluctuation compensation method, and is substantially the same as the first embodiment except that: before acquiring a first reference signal sent by the AAU to the signal receiving device and a second reference signal generated by the signal receiving device, data time delay alignment of the AAU and the signal receiving device is also performed.
It can be understood that, in the first embodiment, when the data delay is small, a better group delay fluctuation compensation effect can be achieved. In the embodiment of the invention, the data time delay alignment of the AAU and the signal receiving device can effectively eliminate the influence of the data time delay and improve the accuracy of the obtained AAU group time delay fluctuation.
A specific flow of the AAU group delay fluctuation compensation method provided by the embodiment of the present invention is shown in fig. 5, and specifically includes the following steps:
s201: and acquiring a signal sent by the AAU to the signal receiving device, and acquiring a third reference signal generated by the signal receiving device.
S202: and determining a time delay value between the AAU and the signal receiving device according to the signal sent by the AAU to the signal receiving device and the third reference signal.
S203: and carrying out data time delay alignment between the AAU and the signal receiving device according to the time delay value.
S204: and acquiring a first reference signal sent by the AAU to the signal receiving device and a second reference signal generated by the signal receiving device.
S205: and determining the phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal.
S206: and compensating the group delay fluctuation of the AAU according to the phase value of the AAU group delay fluctuation.
S204 to S206 are the same as S101 to S103 in the first embodiment, and please refer to the description in the first embodiment for details, which will not be repeated herein.
For S201-S203, the following is specified:
alternatively, the signal transmitted by the acquisition AAU to the signal receiving apparatus and the third reference signal may be the same as the first reference signal and the second reference signal in the first embodiment, such as a demodulation reference signal, or may be other signals, such as an SSB (single sideband) signal, and the specific used signal is not limited herein.
When determining the delay value between the AAU and the signal receiving device according to the signal sent by the AAU to the signal receiving device and the third reference signal, specifically, the delay value may be: according to
Determining a delay value between the AAU and the signal receiving device, wherein f (a, b) is the delay value between the AAU and the signal receiving device, and c (a, b) is the time delay value sent by the AAU to the signal receiving deviceThe covariance of the received signal and the third reference signal, s (a) is the variance of the signal sent by the AAU to the signal receiving device, and s (b) is the variance of the third reference signal.
When performing data delay alignment between the AAU and the signal receiving apparatus based on the delay value, the data delay alignment between the AAU and the signal receiving apparatus may be performed based on the delay value corresponding to the maximum value of f (a, b). It should be understood that according to
The correlation calculation between the signal sent by the AAU to the signal receiving device and the third reference signal is carried out, the maximum value of f (a, b) corresponds to the delay value with the maximum correlation, the frame header position of the signal sent by the AAU to the signal receiving device can be determined according to the maximum value of f (a, b), and then the data delay alignment between the AAU and the signal receiving device is carried out according to the frame header position of the signal.
In a specific example, before S201, the method may further include: and performing trigger synchronization and clock synchronization on the AAU and the signal receiving device. Please refer to fig. 6, which is a diagram illustrating a schematic structure of an AAU group delay fluctuation compensation method according to an embodiment of the present invention. Specifically, the AAU sends a signal to the signal receiving apparatus through the antenna ANTn, and the signal receiving apparatus performs data delay synchronization calculation and group delay fluctuation calculation of the AAU and the signal receiving apparatus through the data processing module. Before performing the data delay synchronization calculation, the AAU provides an external reference (i.e., Ref in fig. 6) and an external flip-flop (i.e., Trigger in fig. 6) to the signal receiving apparatus for flip-flop synchronization and clock synchronization.
By synchronizing the AAU and the line trigger of the signal receiving device and synchronizing the clock, the errors of the frequency and the time delay of the AAU and the signal receiving device can be eliminated, thereby obtaining more accurate AAU group time delay fluctuation.
In a specific example, after determining the phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal, the method may further include: according to Δ n ═ A · FS/(2π·Fc) Calculating the group delay fluctuation point of the AAU, wherein delta n is the group delay fluctuation point, A is the phase value of the AAU group delay fluctuation,FSsampling rate, F, of AAU signals for signal receiving meanscThe frequency points of the signals sent to the signal receiving device by the AAU are set.
It can be understood that the AAU group delay fluctuation compensation method provided in the embodiments of the present invention and the first embodiment can be performed in two stages of detection and compensation.
Please refer to fig. 7, which is an exemplary diagram of a flow of group delay fluctuation detection performed by the AAU group delay fluctuation compensation method according to an embodiment of the present invention, and the exemplary diagram is as follows: 1. the AAU outputs a known source signal; 2. the signal receiving device receives a source signal output by the AAU; 3. collecting signals by a signal collecting module in a signal receiving device; 4. synchronously calculating according to the signal receiving device and the acquired signal to perform data delay alignment; 5. taking the demodulation reference signal of each time slot of the AAU to be conjugate multiplied with the local demodulation reference signal of the signal receiving device to obtain a group of complex number groups; 6. calculating the average value of the complex number group, subtracting each complex number point of the complex number group from the average value to obtain a phase value corresponding to each time slot, and determining a phase value A of the AAU group delay fluctuation according to the phase value of each time slot; 7. from the phase values A and Δ n ═ A · FS/(2π·Fc) Solving the group delay fluctuation point of the AAU; 8. and generating a group delay calibration file according to the phase value of the AAU group delay fluctuation.
Please refer to fig. 8, which is a flowchart illustrating group delay fluctuation compensation performed by the AAU group delay fluctuation compensation method according to an embodiment of the present invention, and the method includes the following steps: 1. the OFDM of the AAU sends out standard signals; 2. importing the group delay fluctuation calibration file into an AAU (asynchronous access unit) to perform phase compensation of the AAU group delay fluctuation; 3. performing time-frequency conversion on the signals subjected to the phase compensation by the IFFT; 4. and the converted signal is processed by an AAU radio frequency link and then is transmitted out through a radio frequency interface.
According to the AAU group delay fluctuation compensation method provided by the embodiment of the invention, the data delay alignment of the AAU and the signal receiving device is carried out before the first reference signal and the second reference signal are obtained, namely before the AAU group delay fluctuation is determined, so that the influence of data delay can be effectively eliminated, and the accuracy of the obtained AAU group delay fluctuation is improved.
In addition, those skilled in the art can understand that the steps of the above methods are divided for clarity, and the implementation can be combined into one step or split into some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, and the method is within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
A third embodiment of the present invention provides an AAU group delay fluctuation compensation apparatus 300, as shown in fig. 9, including an obtaining module 301, a determining module 302, and a compensating module 303, where functions of the modules are described in detail as follows:
an obtaining module 301, configured to obtain a first reference signal sent by an AAU to a signal receiving apparatus and a second reference signal generated by the signal receiving apparatus;
a determining module 302, configured to determine a phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal;
and a compensation module 303, configured to compensate for group delay fluctuation of the AAU according to the phase value.
Further, the AAU group delay fluctuation compensation apparatus 300 according to the embodiment of the present invention further includes a first alignment module, where the first alignment module is configured to:
collecting a signal sent by the AAU to the signal receiving device, and acquiring a third reference signal generated by the signal receiving device;
determining a time delay value between the AAU and the signal receiving device according to a signal sent by the AAU to the signal receiving device and a third reference signal;
and carrying out data time delay alignment of the AAU and the signal receiving device according to the time delay value.
Further, the first alignment module is specifically configured to:
according to
Determining a delay value between the AAU and the signal receiving device, wherein f (a, b) is the delay value and c (a, b) is issued by the AAUCovariance of the signal to the signal receiving means and the third reference signal, s (a) is the variance of the signal sent by the AAU to the signal receiving means, and s (b) is the variance of the third reference signal;
and performing data delay alignment of the AAU and the signal receiving device according to the delay value corresponding to the maximum value of f (a, b).
Further, the third reference signal is a demodulation reference signal or SSB signal generated by the signal receiving apparatus.
Further, the AAU group delay fluctuation compensation apparatus 300 according to the embodiment of the present invention further includes a second alignment module, where the second alignment module is configured to:
and performing trigger synchronization and clock synchronization on the AAU and the signal receiving device.
Further, the AAU group delay fluctuation compensation apparatus 300 provided in the embodiment of the present invention further includes a calculating module, where the calculating module is configured to:
according to Δ n ═ A · FS/(2π·Fc) Calculating the group delay fluctuation point of the AAU, wherein delta n is the group delay fluctuation point, A is the phase value, FSSampling rate, F, of AAU signals for signal receiving meanscThe frequency points of the signals sent to the signal receiving device by the AAU are set.
Further, the obtaining module 301 is specifically configured to:
and acquiring a demodulation reference signal sent by the AAU to the signal receiving device as a first reference signal and acquiring a demodulation reference signal generated by the signal receiving device as a second reference signal.
Further, the determining module 302 is specifically configured to:
performing Fourier transform on the first reference signal of each time slot;
performing conjugate multiplication on the first reference signal subjected to Fourier transform and a second reference signal corresponding to a time slot to obtain a group of complex groups;
calculating the average value of the plurality of groups;
subtracting the average value of each complex value in the complex group from the average value of the complex group, and obtaining the phase value of each time slot according to the subtraction result;
and determining the phase value of the AAU group delay fluctuation according to the phase value of each time slot.
Further, the compensation module 303 is specifically configured to:
forming a group delay calibration file according to the phase value of the AAU group delay fluctuation;
and performing phase compensation on the OFDM modulated signal in the AAU according to the group delay calibration file.
It should be understood that this embodiment is an example of the apparatus corresponding to the first and second embodiments, and may be implemented in cooperation with the first and second embodiments. The related technical details mentioned in the first and second embodiments are still valid in this embodiment, and are not described herein again to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first and second embodiments.
It should be noted that each module referred to in this embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
A fourth embodiment of the present invention relates to an electronic apparatus, as shown in fig. 10, including: at least one processor 401; and a memory 402 communicatively coupled to the at least one processor 401; the memory 402 stores instructions executable by the at least one processor 401, and the instructions are executed by the at least one processor 401, so that the at least one processor 401 can execute the AAU group delay fluctuation compensation method.
Where the memory and processor are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting together one or more of the various circuits of the processor and the memory. The bus may also connect 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. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor.
The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store data used by the processor in performing operations.
A fifth embodiment of the present invention relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. 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 or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (12)
1. A method for compensating delay fluctuation of an AAU group is characterized by comprising the following steps:
acquiring a first reference signal sent by an AAU to a signal receiving device and a second reference signal generated by the signal receiving device;
determining a phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal;
and compensating the group delay fluctuation of the AAU according to the phase value.
2. The AAU group delay fluctuation compensation method of claim 1, further comprising, before acquiring the first reference signal sent by the AAU to the signal receiving apparatus and the second reference signal generated by the signal receiving apparatus:
collecting a signal sent by the AAU to the signal receiving device, and acquiring a third reference signal generated by the signal receiving device;
determining a delay value between the AAU and the signal receiving device according to a signal sent by the AAU to the signal receiving device and the third reference signal;
and performing data time delay alignment of the AAU and the signal receiving device according to the time delay value.
3. The AAU group delay ripple compensation method of claim 2, wherein the determining the delay value between the AAU and the signal receiving apparatus according to the signal sent by the AAU to the signal receiving apparatus and the third reference signal comprises:
according to
Determining a delay value between the AAU and the signal receiving device, wherein f (a, b) is the delay value, c (a, b) is a covariance of a signal issued by the AAU to the signal receiving device and the third reference signal, s (a) is a variance of a signal issued by the AAU to the signal receiving device, and s (b) is a variance of the third reference signal;
the aligning the data time delays of the AAU and the signal receiving apparatus according to the time delay value specifically includes:
and performing data time delay alignment of the AAU and the signal receiving device according to the time delay value corresponding to the maximum value of the f (a, b).
4. The AAU group delay fluctuation compensation method of claim 2, wherein the third reference signal is a demodulation reference signal or SSB signal generated by the signal receiving apparatus.
5. The AAU group delay ripple compensation method of claim 2, wherein before the acquiring the signal sent by the AAU to the signal receiving apparatus and obtaining the third reference signal generated by the signal receiving apparatus, the method further comprises:
and performing trigger synchronization and clock synchronization on the AAU and the signal receiving device.
6. The AAU group delay ripple compensation method of claim 2, further comprising, after the determining the phase value of the AAU group delay ripple from the first reference signal and the second reference signal:
according to Δ n ═ A · FS/(2π·Fc) Calculating the group delay fluctuation point of the AAU, wherein the delta n is the group delay fluctuation point, the A is the phase value, and the F isSFor the sampling rate of the AAU signal by the signal receiving device, the FcAnd sending out the frequency points of the signals to the signal receiving device for the AAU.
7. The AAU group delay fluctuation compensation method of any one of claims 1 to 6, wherein the obtaining the first reference signal sent by the AAU to the signal receiving apparatus and the second reference signal generated by the signal receiving apparatus are specifically:
and acquiring a demodulation reference signal sent by the AAU to the signal receiving device as the first reference signal, and acquiring a demodulation reference signal generated by the signal receiving device as the second reference signal.
8. The AAU group delay ripple compensation method of claim 7, wherein said determining the phase value of the AAU group delay ripple from the first reference signal and the second reference signal comprises:
fourier transforming the first reference signal of each slot;
performing conjugate multiplication on the first reference signal subjected to Fourier transform and the second reference signal corresponding to the time slot to obtain a group of complex groups;
calculating an average of the complex group;
subtracting the average value of each complex value in the complex group from the average value of the complex group, and obtaining the phase value of each time slot according to the subtraction result;
and determining the phase value of the AAU group delay fluctuation according to the phase value of each time slot.
9. The AAU group delay fluctuation compensation method of claim 8, wherein the compensating the AAU group delay fluctuation according to the phase value comprises:
forming a group delay calibration file according to the phase value;
and carrying out phase compensation on the OFDM modulated signals in the AAU according to the group delay calibration file.
10. An apparatus for compensating for delay fluctuation of an AAU group, comprising:
the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a first reference signal sent by an AAU to a signal receiving device and a second reference signal generated by the signal receiving device;
a determining module, configured to determine a phase value of the AAU group delay fluctuation according to the first reference signal and the second reference signal;
and the compensation module is used for compensating the group delay fluctuation of the AAU according to the phase value.
11. An electronic device, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the AAU group delay ripple compensation method of any one of claims 1 to 9.
12. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the AAU group delay fluctuation compensation method according to any one of claims 1 to 9.
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