CN116546613A - Method, device, equipment and medium for determining wireless local area network I/Q time imbalance - Google Patents

Method, device, equipment and medium for determining wireless local area network I/Q time imbalance Download PDF

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CN116546613A
CN116546613A CN202310752904.9A CN202310752904A CN116546613A CN 116546613 A CN116546613 A CN 116546613A CN 202310752904 A CN202310752904 A CN 202310752904A CN 116546613 A CN116546613 A CN 116546613A
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determining
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CN116546613B (en
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邓玉前
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Gaotuoxunda Beijing Microelectronics Co ltd
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Gaotuoxunda Beijing Microelectronics Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H04B1/7183—Synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a method, a device, equipment and a medium for determining wireless local area network I/Q time imbalance, comprising the following steps: calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal; determining the time unbalance of the I path signal and the time unbalance of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value; calculating an I path signal and a Q path signal on a receiving end of a target wireless local area network system, and determining the time unbalance amount of the Q path signal on the receiving end relative to the I path signal; based on the time unbalance amount of the Q path signals on the receiving end relative to the I path signals, the time unbalance amount of the I path signals on the transmitting end and the time unbalance amount of the Q path signals, the total time unbalance amount of the target wireless local area network system is determined, and the accuracy of determining the I/Q time unbalance amount is improved.

Description

Method, device, equipment and medium for determining wireless local area network I/Q time imbalance
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a method, an apparatus, a device, and a medium for determining I/Q time imbalance of a wireless local area network.
Background
With rapid development of wireless broadband access technology and rapid popularization of wireless terminal devices, wireless local area networks (Wi-Fi) are becoming necessities of life. Among factors affecting the communication performance of wireless local area networks, the non-ideal characteristics of the radio frequency devices are one of the key influencing factors. After the non-ideal characteristics of the radio frequency device are generated, one of the main effects is I/Q imbalance between signals, and the I/Q imbalance mainly includes four aspects of gain imbalance, phase imbalance, direct current bias and time imbalance. The I/Q time imbalance means that the I-path signal and the Q-path signal have time difference when transmitted, and are not synchronous and balanced, and the main reasons of the phenomenon are that group delay is inconsistent when the I-path signal and the Q-path signal pass through a filter, and the adoption time of an analog-to-digital converter or a digital-to-analog converter is inconsistent. In practice, the problem of I/Q time imbalance is common in the baseband part of wireless lan systems and can significantly impair the demodulation performance of the system. The determination of the amount of I/Q time imbalance in a wireless local area network is a non-trivial technical problem.
Disclosure of Invention
In view of this, the present application aims to provide a method, an apparatus, a device and a medium for determining the I/Q time imbalance of a wireless local area network, so as to determine not only the integer multiple sample period deviation, but also the decimal multiple sample period deviation, and to determine the I/Q time imbalance with higher accuracy, and to improve the accuracy of determining the I/Q time imbalance.
The embodiment of the application provides a method for determining the I/Q time imbalance of a wireless local area network, which is characterized by comprising the following steps:
calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal;
determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value;
calculating the I-path signal on a receiving end of the target wireless local area network system and the Q-path signal on the receiving end, and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal;
And determining the total time unbalance amount of the target wireless local area network system based on the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, the time unbalance amount of the I-channel signal on the transmitting end and the time unbalance amount of the Q-channel signal on the transmitting end.
In one possible implementation manner, the calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, to determine the first cross-correlation value of the I-path signal and the second cross-correlation value of the Q-path signal, includes:
determining signal instantaneous power with time unbalance between the I-path signal and the Q-path signal based on the I-path signal and the Q-path signal;
and performing cross-correlation calculation on the instantaneous power of the signal, the signal powers of a plurality of signal sample points on the I-path signal without time unbalance and the signal powers of a plurality of signal sample points on the Q-path signal without time unbalance respectively, and determining the first cross-correlation value and the second cross-correlation value.
In one possible implementation manner, the determining the time imbalance of the I-path signal on the transmitting end and the time imbalance of the Q-path signal on the transmitting end based on the first cross-correlation value and the second cross-correlation value includes:
Carrying out instantaneous power maximum value solving on the first cross correlation value and the second cross correlation value, and determining the first maximum integer multiple sample point period deviation of the I path signal and the second maximum integer multiple sample point period deviation of the Q path signal;
performing quadratic polynomial fitting solution on the first maximum integer multiple sample point period deviation, and determining the time unbalance amount of the I-path signal on the transmitting end;
and carrying out quadratic polynomial fitting solution on the second maximum integer multiple sample point period deviation, and determining the time unbalance amount of the Q paths of signals on the transmitting end.
In one possible implementation manner, the calculating the I-path signal on the receiving end of the target wireless lan system and the Q-path signal on the receiving end, to determine a time imbalance amount of the Q-path signal on the receiving end relative to the I-path signal, includes:
performing Fourier transform on the I-path signal on the receiving end and the Q-path signal on the receiving end respectively to determine the I-path signal after Fourier transform and the Q-path signal after Fourier transform;
calculating the differential average value of phase angles of the ratio between the I path signals after Fourier transformation and the Q path signals after Fourier transformation, and determining the differential average value of a target phase angle;
And determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal based on the differential average value of the target phase angle.
In one possible implementation manner, the determining the total time imbalance amount of the target wlan system based on the time imbalance amount of the Q-channel signal on the receiving side relative to the I-channel signal, the time imbalance amount of the I-channel signal on the transmitting side, and the time imbalance amount of the Q-channel signal on the transmitting side includes:
determining the time unbalance amount of the Q-channel signal on the transmitting end relative to the I-channel signal based on the difference between the time unbalance amount of the Q-channel signal on the transmitting end and the time unbalance amount of the I-channel signal on the transmitting end;
and determining the total time unbalance amount of the target wireless local area network system based on the sum of the time unbalance amount of the Q-channel signal on the transmitting end relative to the I-channel signal and the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal.
In one possible implementation manner, after the determining the total time imbalance amount of the target wireless lan system based on the time imbalance amount of the Q-way signal on the receiving side with respect to the I-way signal, the time imbalance amount of the I-way signal on the transmitting side, and the time imbalance amount of the Q-way signal on the transmitting side, the determining method further includes:
Compensating the total time imbalance difference based on an integer multiple of sample number period and a fractional multiple of sample number period;
the integer multiple number of sample periods and the fraction multiple number of sample periods are determined by splitting the total time imbalance difference by integer multiple and fraction multiple.
In one possible implementation, for the Q-way signal, the compensating the total time imbalance difference based on an integer multiple number of sample periods and a fractional multiple number of sample periods includes:
delaying the Q-channel signals by the integer multiple sample point number period number, and determining the Q-channel signals after compensating the integer multiple sample point period deviation;
determining a time domain response of the filter based on the order of the filter and the fractional number of sample point periods;
and carrying out convolution operation on the Q paths of signals after the compensation integer multiple sampling point period deviation based on the time domain response, and determining the Q paths of signals after compensation calibration.
The embodiment of the application also provides a device for determining the I/Q time imbalance of the wireless local area network, which comprises the following steps:
the cross-correlation calculation module is used for calculating the I-path signals and the Q-path signals with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signals and a second cross-correlation value of the Q-path signals;
The transmitting end unbalance amount determining module is used for determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value;
the receiving end unbalance amount determining module is used for calculating the I path signal on the receiving end of the target wireless local area network system and the Q path signal on the receiving end and determining the time unbalance amount of the Q path signal on the receiving end relative to the I path signal;
the total time unbalance amount determining module is configured to determine a total time unbalance amount of the target wireless local area network system based on a time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, a time unbalance amount of the I-channel signal on the transmitting end, and a time unbalance amount of the Q-channel signal on the transmitting end.
The embodiment of the application also provides electronic equipment, which comprises: the system comprises a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, the processor and the memory are communicated through the bus when the electronic device is running, and the machine-readable instructions are executed by the processor to perform the steps of the method for determining the I/Q time imbalance of the wireless local area network.
Embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor performs the steps of a method for determining an I/Q time imbalance of a wireless local area network as described above.
The method, device, equipment and medium for determining the I/Q time imbalance of the wireless local area network provided by the embodiment of the application comprise the following steps: calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal; determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value; calculating the I-path signal on a receiving end of the target wireless local area network system and the Q-path signal on the receiving end, and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal; and determining the total time unbalance amount of the target wireless local area network system based on the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, the time unbalance amount of the I-channel signal on the transmitting end and the time unbalance amount of the Q-channel signal on the transmitting end. The method and the device have the advantages that not only the integer multiple sample point period deviation can be determined, but also the decimal multiple sample point period deviation can be determined, the accuracy of determining the I/Q time imbalance is higher, and the accuracy of determining the I/Q time imbalance is improved.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for determining an I/Q time imbalance of a wlan according to an embodiment of the present application;
fig. 2 is a second flowchart of a method for determining an I/Q time imbalance of a wlan according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a device for determining I/Q time imbalance of a wlan according to an embodiment of the present application;
fig. 4 is a second schematic structural diagram of a device for determining I/Q time imbalance of a wlan according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it should be understood that the accompanying drawings in the present application are only for the purpose of illustration and description, and are not intended to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. A flowchart, as used in this application, illustrates operations implemented according to some embodiments of the present application. It should be appreciated that the operations of the flow diagrams may be implemented out of order and that steps without logical context may be performed in reverse order or concurrently. Moreover, one or more other operations may be added to the flow diagrams and one or more operations may be removed from the flow diagrams as directed by those skilled in the art.
In addition, the described embodiments are only some, but not all, of the embodiments of the present application. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
In order to enable one skilled in the art to utilize the present disclosure, the following embodiments are provided in connection with a particular application scenario "determination of wireless local area network I/Q time imbalance", and the generic principles defined herein may be applied to other embodiments and applications without departing from the spirit or scope of the present disclosure.
The method, apparatus, electronic device or computer readable storage medium described below may be applied to any scenario in which determination of the wireless local area network I/Q time imbalance is required, but the embodiment of the present application is not limited to a specific application scenario, and any scheme using the method, apparatus, device and medium for determining the wireless local area network I/Q time imbalance provided by the embodiment of the present application is within the scope of protection of the present application.
First, application scenarios applicable to the present application will be described. The method and the device can be applied to the technical field of wireless communication.
It has been found that with the rapid development of wireless broadband access technology and the rapid popularization of wireless terminal devices, wireless local area networks (Wi-Fi) are becoming a necessity for life. Among factors affecting the communication performance of wireless local area networks, the non-ideal characteristics of the radio frequency devices are one of the key influencing factors. After the non-ideal characteristics of the radio frequency device are generated, one of the main effects is I/Q imbalance between signals, and the I/Q imbalance mainly includes four aspects of gain imbalance, phase imbalance, direct current bias and time imbalance. The I/Q time imbalance means that the I-path signal and the Q-path signal have time difference when transmitted, are not synchronous and balanced, and the main reason for the phenomenon is that the group delay of the I-path signal and the Q-path signal when passing through the filter is inconsistent and the adoption time of the analog-to-digital converter or the digital-to-analog converter is inconsistent. In practice, the problem of I/Q time imbalance is common in the baseband part of wireless lan systems and can significantly impair the demodulation performance of the system. The determination of the amount of I/Q time imbalance in a wireless local area network is a non-trivial technical problem.
Based on the above, the embodiment of the application provides a method for determining the I/Q time imbalance of a wireless local area network, which not only determines the integer multiple sample period deviation, but also determines the decimal multiple sample period deviation, has higher accuracy for determining the I/Q time imbalance, and improves the accuracy for determining the I/Q time imbalance.
Referring to fig. 1, fig. 1 is a flowchart of a method for determining an I/Q time imbalance of a wlan according to an embodiment of the present application. As shown in fig. 1, a determining method provided in an embodiment of the present application includes:
s101: and calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal.
In the step, the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system are calculated, and the first cross-correlation value of the I-path signal and the second cross-correlation value of the Q-path signal are determined.
Here, the first cross-correlation value is a result of performing cross-correlation calculation on the I-channel signal.
The method comprises the following steps of obtaining an I path signal and a Q path signal with the same signal frequency domain: a special signal is constructed at the transmitting end, and the I-path signal and the Q-path signal in the time domain of the signal are the same, such as a signal subjected to pi/4-BPSK modulation.
In one possible implementation manner, the calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, to determine the first cross-correlation value of the I-path signal and the second cross-correlation value of the Q-path signal, includes:
a: and determining the signal instantaneous power with time unbalance between the I-path signal and the Q-path signal based on the I-path signal and the Q-path signal.
Here, the instantaneous power of the signal having the amount of time imbalance between the I-way signal and the Q-way signal is determined based on the I-way signal and the Q-way signal.
Wherein, the instantaneous power of the signal is determined by the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,P t （n）is the first signal with time unbalance between the I signal and the Q signalnThe instantaneous power of the individual signal samples,the first time of unbalancen（nI-way signal of 1) sample points or more>The first time of unbalancen（nQ paths of signals of more than or equal to 1) sampling points.
B: and performing cross-correlation calculation on the instantaneous power of the signal, the signal powers of a plurality of signal sample points on the I-path signal without time unbalance and the signal powers of a plurality of signal sample points on the Q-path signal without time unbalance respectively, and determining the first cross-correlation value and the second cross-correlation value.
And performing cross-correlation calculation according to the instantaneous power of the signal and the signal power of a plurality of signal sample points on the I-path signal without the time unbalance and a plurality of signal sample points on the Q-path signal without the time unbalance, and determining the first cross-correlation value and the second cross-correlation value.
Here, the first cross-correlation value and the second cross-correlation value are determined by the following formula:
wherein, the calculated signal instantaneous power isP t （n）Respectively performing cross-correlation calculation with the signal power of the I path and the Q path without time unbalance, and respectively obtaining a first cross-correlation valueWith a second cross-correlation value->N is the number of signal samples counted, < + >>、/>The delay amounts of the I/Q path signals which are respectively the original non-existing time delay amounts are expressed in terms of sample period +.>To be free of time imbalanceQuantity I signal power of a plurality of signal samples on the signal, < >>The signal power for a plurality of signal samples on the Q-way signal is measured for the absence of a time imbalance.
S102: and determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value.
In the step, the time unbalance of the I path signal on the transmitting end and the time unbalance of the Q path signal on the transmitting end are determined according to the first cross correlation value and the second cross correlation value.
The time imbalance amount refers to the amount that the I-path signal and the Q-path signal have time difference when in transmission and are not synchronous balance, and the main reasons of the phenomenon are inconsistent group delay when the I-path signal and the Q-path signal pass through a filter and inconsistent adoption time when the I-path signal and the Q-path signal pass through an analog-to-digital converter or a digital-to-analog converter.
In one possible implementation manner, the determining the time imbalance of the I-path signal on the transmitting end and the time imbalance of the Q-path signal on the transmitting end based on the first cross-correlation value and the second cross-correlation value includes:
a: and carrying out instantaneous power maximum value solving on the first cross-correlation value and the second cross-correlation value, and determining the first maximum integer multiple sample point period deviation of the I path signal and the second maximum integer multiple sample point period deviation of the Q path signal.
The instantaneous power maximum value is solved for the first cross correlation value and the second cross correlation value, and the first maximum integer multiple sample point period deviation of the I path signal and the second maximum integer multiple sample point period deviation of the Q path signal are determined.
Solving the integer multiple sample point period deviation corresponding to the maximum value of the cross correlation value, and aiming at the first cross correlation valueSecond cross-correlation value->Solving the maximum value by instantaneous work to obtain the maximum value integer multiple sampling point period deviation +.>、/>，/>For the maximum integer multiple sampling point period deviation of the I-path signal, < >>Is the maximum integer multiple sampling point period deviation of Q paths of signals.
The first maximum integer multiple sample period deviation and the second maximum integer multiple sample period deviation are time unbalance amounts of the integer multiple sample periods.
b: performing quadratic polynomial fitting solution on the first maximum integer multiple sample point period deviation, and determining the time unbalance amount of the I-path signal on the transmitting end; and carrying out quadratic polynomial fitting solution on the second maximum integer multiple sample point period deviation, and determining the time unbalance amount of the Q paths of signals on the transmitting end.
And performing quadratic polynomial fitting solution on the first maximum integer multiple sample point period deviation to determine the time unbalance of the I-path signal on the transmitting end, and performing quadratic polynomial fitting solution on the second maximum integer multiple sample point period deviation to determine the time unbalance of the Q-path signal on the transmitting end.
Here, solve to obtain、/>Then, the time imbalance of the integral multiple sample point period is obtained by solvingAnd does not include fractional sample period deviations. Therefore, the scheme utilizes quadratic polynomial fitting to solve and obtain the time unbalance of the I-path signal and the Q-path signal on the final transmitting end.
Determining the time unbalance of the I-path signal and the Q-path signal of the transmitting end through the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,for the amount of time imbalance of the I-channel signal on the transmitting side,/o>For the amount of time imbalance of the Q-channel signal at the transmitting end,/o>For the second maximum integer multiple of sample period deviation,/i>For the first maximum integer multiple of sample period deviations,for +.>-1 performing a cross-correlation calculation on the signal samples corresponding to, -1>For +.>And (3) performing cross-correlation calculation on the signal sample points corresponding to the (1).
S103: and calculating the I-path signal on the receiving end of the target wireless local area network system and the Q-path signal on the receiving end, and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal.
In the step, the I-path signal and the Q-path signal on the receiving end of the target wireless local area network system are calculated, and the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal is determined.
In one possible implementation manner, the calculating the I-path signal on the receiving end of the target wireless lan system and the Q-path signal on the receiving end, to determine a time imbalance amount of the Q-path signal on the receiving end relative to the I-path signal, includes:
(1): and carrying out Fourier transform on the I-path signal on the receiving end and the Q-path signal on the receiving end respectively to determine the I-path signal after Fourier transform and the Q-path signal after Fourier transform.
The I-path signal and the Q-path signal at the receiving end are subjected to fourier transform, respectively, to determine the fourier-transformed I-path signal and the fourier-transformed Q-path signal.
The I-path signal and the Q-path signal on the receiving end are determined by the following formulas:
wherein, the liquid crystal display device comprises a liquid crystal display device,for the I-way signal on the receiving side, +.>For Q-way signal on receiving side, +.>For the signal power of a plurality of signal samples on the non-time imbalance I-way signal, < +.>For the signal power of a plurality of signal samples on the Q-way signal without time imbalance, < +.>、/>The amplitude and phase of the receiving end are unbalanced, < ->、/>Time imbalance amount introduced by I, Q paths of receiving end respectively, < > >、/>The amplitude and the phase of the transmitting end are unbalanced respectively.
Here, fourier transforms are performed on the I-path signal and the Q-path signal on the receiving side, respectively, by the following formulas:
wherein, the liquid crystal display device comprises a liquid crystal display device,、/>the I-path signal after Fourier transformation and the Q-path signal after Fourier transformation are respectively, </I >>For the number of signal samples of the fourier transform, +.>For the I-way signal on the receiving side, +.>For Q paths of signals on the receiving end, n is the number of signal sample points.
(2): and calculating the differential average value of the phase angles of the I path signals after Fourier transformation and the Q path signals after Fourier transformation, and determining the differential average value of the target phase angles.
Here, the difference mean value of the phase angles is calculated for the ratio between the I-path signals after fourier transformation and the Q-path signals after fourier transformation, and the difference mean value of the target phase angles is determined.
Wherein, the differential mean value of the target phase angle is determined by the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,Ais the differential mean value of the target phase angle,for obtaining the phase angle of the ratio of the I path signal after Fourier transformation and the Q path signal after Fourier transformation, the method comprises the following steps of->Is the number of signal samples for fourier transform.
(3): and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal based on the differential average value of the target phase angle.
Here, the amount of time imbalance of the Q-way signal on the receiving end relative to the I-way signal is determined based on the differential average of the target phase angles.
The time unbalance amount of the Q paths of signals on the receiving end relative to the I paths of signals is determined by the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,for the time unbalance of the receiving end Q path relative to the I path, A is the differential average value of the target phase angle,is the number of signal samples for fourier transform.
S104: and determining the total time unbalance amount of the target wireless local area network system based on the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, the time unbalance amount of the I-channel signal on the transmitting end and the time unbalance amount of the Q-channel signal on the transmitting end.
In the step, the total time unbalance amount of the target wireless local area network system is determined according to the time unbalance amount of the Q path signal on the receiving end relative to the I path signal, the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal.
In one possible implementation manner, the determining the total time imbalance amount of the target wlan system based on the time imbalance amount of the Q-channel signal on the receiving side relative to the I-channel signal, the time imbalance amount of the I-channel signal on the transmitting side, and the time imbalance amount of the Q-channel signal on the transmitting side includes:
i: and determining the time unbalance amount of the Q-channel signal on the transmitting end relative to the I-channel signal based on the difference between the time unbalance amount of the Q-channel signal on the transmitting end and the time unbalance amount of the I-channel signal on the transmitting end.
Here, the amount of time imbalance of the Q signal on the transmitting end relative to the I signal is determined based on the difference between the amount of time imbalance of the Q signal on the transmitting end and the amount of time imbalance of the I signal on the transmitting end.
II: and determining the total time unbalance amount of the target wireless local area network system based on the sum of the time unbalance amount of the Q-channel signal on the transmitting end relative to the I-channel signal and the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal.
Here, the total time unbalance amount of the target wireless lan system is determined according to the sum of the time unbalance amount of the Q-way signal on the transmitting end with respect to the I-way signal and the time unbalance amount of the Q-way signal on the receiving end with respect to the I-way signal.
Wherein, the time unbalance of the transmitting end and the receiving end can obtain the time unbalance of the total systemI.e. +.>，/>For the time unbalance of the Q path relative to the I path of the receiving end,/>The time unbalance of the Q path of the transmitting end relative to the I path is obtained.
According to the scheme, the integer multiple sample point period deviation can be estimated, the decimal multiple sample point period deviation can also be estimated, and the estimation accuracy is higher.
The embodiment of the application provides a method for determining the I/Q time imbalance of a wireless local area network, which comprises the following steps: calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal; determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value; calculating the I-path signal on a receiving end of the target wireless local area network system and the Q-path signal on the receiving end, and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal; and determining the total time unbalance amount of the target wireless local area network system based on the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, the time unbalance amount of the I-channel signal on the transmitting end and the time unbalance amount of the Q-channel signal on the transmitting end. The method and the device have the advantages that not only the integer multiple sample point period deviation can be determined, but also the decimal multiple sample point period deviation can be determined, the accuracy of determining the I/Q time imbalance is higher, and the accuracy of determining the I/Q time imbalance is improved.
Referring to fig. 2, fig. 2 is a second flowchart of a method for determining an I/Q time imbalance of a wlan according to an embodiment of the present application. As shown in fig. 2, the determining method provided in the embodiment of the present application includes:
s201: and calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal.
S202: and determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value.
S203: and calculating the I-path signal on the receiving end of the target wireless local area network system and the Q-path signal on the receiving end, and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal.
S204: and determining the total time unbalance amount of the target wireless local area network system based on the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, the time unbalance amount of the I-channel signal on the transmitting end and the time unbalance amount of the Q-channel signal on the transmitting end.
The descriptions of S201 to S204 may refer to the descriptions of S101 to S104, and the same technical effects can be achieved, which will not be described in detail.
S205: compensating the total time imbalance difference based on an integer multiple of sample number period and a fractional multiple of sample number period; the integer multiple number of sample periods and the fraction multiple number of sample periods are determined by splitting the total time imbalance difference by integer multiple and fraction multiple.
In this step, the total time unbalance amount is compensated according to the integer number of sample periods and the fraction number of sample periods.
Here, the integer number of sample periods and the fractional number of sample periods are determined by dividing the total time imbalance by an integer number and a fractional number. If the determined total time unbalance amount is 2.3s, splitting the 2.3s sample number into an integer multiple of sample number period number of 2 and a decimal multiple of sample number period number of 0.3.
Wherein, the time unbalance of the total Q path relative to the I path is obtainedAfterwards, +.>Dividing into integer multiple of sample number period number->And decimal number of sample number period +.>I.e. +. >。
In one possible implementation, for the Q-way signal, the compensating the total time imbalance difference based on an integer multiple number of sample periods and a fractional multiple number of sample periods includes:
i: and delaying the Q paths of signals by the integer multiple of sampling point number period quantity, and determining the Q paths of signals after compensating the integer multiple of sampling point period deviation.
Here, the Q-way signal after compensating the integer multiple of the sample point period deviation is determined for the Q-way signal delayed by the integer multiple of the sample point period number.
Wherein, after Q paths of signal compensation are setDelay the Q-channel signal by integer multiple of the sample period number + ->Obtaining a signal without integer multiple of sample period deviation +.>I.e. +.>。/>
If the I-channel signal is delayed by the integer multiple sampling point period number, determining the I-channel signal after compensating the integer multiple sampling point period deviation, and if necessary, increasing the I-channel signal by the integer multiple sampling point period numberAnd obtaining an I-path signal without integer multiple sampling point period deviation.
ii: and determining the time domain response of the filter based on the order of the filter and the fractional number of sample point number period.
Here, assuming that the order of the input filter is L, the time domain response of the filter can be expressed as . Wherein the operator "II" represents a successive product operation; when L is an even numberWhen L is an odd number +.>，h（n）For the time domain response +.>Is a fractional multiple of the number of sample dot cycles.
iii: and carrying out convolution operation on the Q paths of signals after the compensation integer multiple sampling point period deviation based on the time domain response, and determining the Q paths of signals after compensation calibration.
And performing convolution operation on the Q paths of signals subjected to compensation of the integer multiple sampling point period deviation according to the time domain response, and determining the Q paths of signals subjected to compensation calibration.
For example, the Q paths of signals after compensating the period deviation of the integer multiple sampling points are filtered to obtain the final compensated and calibrated signals：/>。
Wherein if the signal is directed to the I-path signal, thenAnd carrying out convolution operation on the I-path signals after the compensation of the integer multiple sample point period deviation according to the time domain response, and determining the I-path signals after compensation and calibration.
The scheme can correct the I/Q signals aiming at the transmitting end and the receiving end which have I/Q time imbalance at the same time, and the system does not influence actual estimation and compensation when the I/Q is unbalanced, so that the application scene of practical application is wider.
The embodiment of the application provides a method for determining the I/Q time imbalance of a wireless local area network, which comprises the following steps: calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal; determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value; calculating the I-path signal on a receiving end of the target wireless local area network system and the Q-path signal on the receiving end, and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal; and determining the total time unbalance amount of the target wireless local area network system based on the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, the time unbalance amount of the I-channel signal on the transmitting end and the time unbalance amount of the Q-channel signal on the transmitting end. Compensating the total time imbalance difference based on an integer multiple of sample number period and a fractional multiple of sample number period; the integer multiple number of sample periods and the fraction multiple number of sample periods are determined by splitting the total time imbalance difference by integer multiple and fraction multiple. The scheme can correct the I/Q signals for the transmitter and the receiver with the I/Q time imbalance, and the system does not influence the actual estimation and compensation when the I/Q imbalance exists, so that the application scene of the practical application is wider.
Referring to fig. 3 and fig. 4, fig. 3 is a schematic structural diagram of a device for determining I/Q time imbalance of a wlan according to an embodiment of the present application; fig. 4 is a second schematic structural diagram of a device for determining I/Q time imbalance of a wlan according to an embodiment of the present application. As shown in fig. 3, the determining apparatus 300 includes:
the cross-correlation calculation module 310 is configured to calculate an I-path signal and a Q-path signal, which have the same signal frequency domain at a transmitting end of the target wireless lan system, and determine a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal;
a transmitting-end unbalance determining module 320, configured to determine, based on the first cross-correlation value and the second cross-correlation value, a time unbalance amount of the I-path signal on the transmitting end and a time unbalance amount of the Q-path signal on the transmitting end;
a receiving-end imbalance determining module 330, configured to calculate the I-path signal on the receiving end of the target wireless local area network system and the Q-path signal on the receiving end, and determine a time imbalance amount of the Q-path signal on the receiving end relative to the I-path signal;
A total time imbalance difference determining module 340, configured to determine a total time imbalance difference of the target wlan system based on a time imbalance difference of the Q-channel signal on the receiving end relative to the I-channel signal, a time imbalance of the I-channel signal on the transmitting end, and a time imbalance of the Q-channel signal on the transmitting end.
Further, when the cross-correlation calculation module 310 is configured to calculate the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless lan system, it determines a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal, the cross-correlation calculation module 310 is specifically configured to:
determining signal instantaneous power with time unbalance between the I-path signal and the Q-path signal based on the I-path signal and the Q-path signal;
and performing cross-correlation calculation on the instantaneous power of the signal, the signal powers of a plurality of signal sample points on the I-path signal without time unbalance and the signal powers of a plurality of signal sample points on the Q-path signal without time unbalance respectively, and determining the first cross-correlation value and the second cross-correlation value.
Further, when the transmitting-end unbalance amount determining module 320 is configured to determine the amount of time unbalance of the I-path signal on the transmitting end and the amount of time unbalance of the Q-path signal on the transmitting end based on the first cross-correlation value and the second cross-correlation value, the transmitting-end unbalance amount determining module 320 is specifically configured to:
carrying out instantaneous power maximum value solving on the first cross correlation value and the second cross correlation value, and determining the first maximum integer multiple sample point period deviation of the I path signal and the second maximum integer multiple sample point period deviation of the Q path signal;
performing quadratic polynomial fitting solution on the first maximum integer multiple sample point period deviation, and determining the time unbalance amount of the I-path signal on the transmitting end;
and carrying out quadratic polynomial fitting solution on the second maximum integer multiple sample point period deviation, and determining the time unbalance amount of the Q paths of signals on the transmitting end.
Further, when the receiving-end imbalance determining module 330 is configured to calculate the I-path signal on the receiving end of the target wlan system and the Q-path signal on the receiving end, and determine a time imbalance amount of the Q-path signal on the receiving end relative to the I-path signal, the receiving-end imbalance determining module 330 is specifically configured to:
Performing Fourier transform on the I-path signal on the receiving end and the Q-path signal on the receiving end respectively to determine the I-path signal after Fourier transform and the Q-path signal after Fourier transform;
calculating the differential average value of phase angles of the ratio between the I path signals after Fourier transformation and the Q path signals after Fourier transformation, and determining the differential average value of a target phase angle;
and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal based on the differential average value of the target phase angle.
Further, the total time unbalance amount determining module 340 is specifically configured to, when determining the total time unbalance amount of the target wireless lan system based on the time unbalance amount of the Q-channel signal on the receiving side with respect to the I-channel signal, the time unbalance amount of the I-channel signal on the transmitting side, and the time unbalance amount of the Q-channel signal on the transmitting side:
determining the time unbalance amount of the Q-channel signal on the transmitting end relative to the I-channel signal based on the difference between the time unbalance amount of the Q-channel signal on the transmitting end and the time unbalance amount of the I-channel signal on the transmitting end;
And determining the total time unbalance amount of the target wireless local area network system based on the sum of the time unbalance amount of the Q-channel signal on the transmitting end relative to the I-channel signal and the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal.
Further, as shown in fig. 4, the determining apparatus 300 further includes a correction module 350, where the correction module 350 is configured to:
compensating the total time imbalance difference based on an integer multiple of sample number period and a fractional multiple of sample number period;
the integer multiple number of sample periods and the fraction multiple number of sample periods are determined by splitting the total time imbalance difference by integer multiple and fraction multiple.
Further, the correction module 350 is configured to compensate the total time imbalance difference for the Q-channel signal based on the integer number of sample periods and the fractional number of sample periods, and includes:
delaying the Q-channel signals by the integer multiple sample point number period number, and determining the Q-channel signals after compensating the integer multiple sample point period deviation;
determining a time domain response of the filter based on the order of the filter and the fractional number of sample point periods;
And carrying out convolution operation on the Q paths of signals after the compensation integer multiple sampling point period deviation based on the time domain response, and determining the Q paths of signals after compensation calibration.
The embodiment of the application provides a device for determining the I/Q time imbalance of a wireless local area network, which comprises the following components: the cross-correlation calculation module is used for calculating the I-path signals and the Q-path signals with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signals and a second cross-correlation value of the Q-path signals; the transmitting end unbalance amount determining module is used for determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value; the receiving end unbalance amount determining module is used for calculating the I path signal on the receiving end of the target wireless local area network system and the Q path signal on the receiving end and determining the time unbalance amount of the Q path signal on the receiving end relative to the I path signal; the total time unbalance amount determining module is configured to determine a total time unbalance amount of the target wireless local area network system based on a time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, a time unbalance amount of the I-channel signal on the transmitting end, and a time unbalance amount of the Q-channel signal on the transmitting end. The method and the device have the advantages that not only the integer multiple sample point period deviation can be determined, but also the decimal multiple sample point period deviation can be determined, the accuracy of determining the I/Q time imbalance is higher, and the accuracy of determining the I/Q time imbalance is improved.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 5, the electronic device 500 includes a processor 510, a memory 520, and a bus 530.
The memory 520 stores machine-readable instructions executable by the processor 510, and when the electronic device 500 is running, the processor 510 communicates with the memory 520 through the bus 530, and when the machine-readable instructions are executed by the processor 510, the steps of the method for determining the I/Q time imbalance of the wlan in the method embodiments shown in fig. 1 and fig. 2 can be executed, and the specific implementation is referred to the method embodiments and will not be described herein.
The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps of the method for determining the I/Q time imbalance of the wireless local area network in the method embodiments shown in fig. 1 and fig. 2 may be executed, and a specific implementation manner may refer to the method embodiment and will not be repeated herein.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods 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 (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the foregoing examples are merely specific embodiments of the present application, and are not intended to limit the scope of the present application, but the present application is not limited thereto, and those skilled in the art will appreciate that while the foregoing examples are described in detail, the present application is not limited thereto. Any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope of the disclosure of the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A method for determining an I/Q time imbalance of a wireless local area network, the method comprising:
calculating the I-path signal and the Q-path signal with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signal and a second cross-correlation value of the Q-path signal;
determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value;
calculating the I-path signal on a receiving end of the target wireless local area network system and the Q-path signal on the receiving end, and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal;
and determining the total time unbalance amount of the target wireless local area network system based on the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, the time unbalance amount of the I-channel signal on the transmitting end and the time unbalance amount of the Q-channel signal on the transmitting end.
2. The method for determining according to claim 1, wherein the calculating the I-path signal and the Q-path signal with the same signal frequency domain at the transmitting end of the target wireless lan system, determining the first cross-correlation value of the I-path signal and the second cross-correlation value of the Q-path signal, includes:
determining signal instantaneous power with time unbalance between the I-path signal and the Q-path signal based on the I-path signal and the Q-path signal;
and performing cross-correlation calculation on the instantaneous power of the signal, the signal powers of a plurality of signal sample points on the I-path signal without time unbalance and the signal powers of a plurality of signal sample points on the Q-path signal without time unbalance respectively, and determining the first cross-correlation value and the second cross-correlation value.
3. The method according to claim 1, wherein the determining the amount of time imbalance of the I-path signal on the transmitting side and the amount of time imbalance of the Q-path signal on the transmitting side based on the first cross-correlation value and the second cross-correlation value includes:
carrying out instantaneous power maximum value solving on the first cross correlation value and the second cross correlation value, and determining the first maximum integer multiple sample point period deviation of the I path signal and the second maximum integer multiple sample point period deviation of the Q path signal;
Performing quadratic polynomial fitting solution on the first maximum integer multiple sample point period deviation, and determining the time unbalance amount of the I-path signal on the transmitting end;
and carrying out quadratic polynomial fitting solution on the second maximum integer multiple sample point period deviation, and determining the time unbalance amount of the Q paths of signals on the transmitting end.
4. The determining method according to claim 1, wherein the calculating the I-path signal on the receiving side of the target wireless lan system and the Q-path signal on the receiving side, determining the amount of time imbalance of the Q-path signal on the receiving side with respect to the I-path signal, includes:
performing Fourier transform on the I-path signal on the receiving end and the Q-path signal on the receiving end respectively to determine the I-path signal after Fourier transform and the Q-path signal after Fourier transform;
calculating the differential average value of phase angles of the ratio between the I path signals after Fourier transformation and the Q path signals after Fourier transformation, and determining the differential average value of a target phase angle;
and determining the time unbalance amount of the Q-path signal on the receiving end relative to the I-path signal based on the differential average value of the target phase angle.
5. The method according to claim 1, wherein the determining the total time imbalance amount of the target wireless lan system based on the time imbalance amount of the Q-way signal on the receiving side with respect to the I-way signal, the time imbalance amount of the I-way signal on the transmitting side, and the time imbalance amount of the Q-way signal on the transmitting side includes:
determining the time unbalance amount of the Q-channel signal on the transmitting end relative to the I-channel signal based on the difference between the time unbalance amount of the Q-channel signal on the transmitting end and the time unbalance amount of the I-channel signal on the transmitting end;
and determining the total time unbalance amount of the target wireless local area network system based on the sum of the time unbalance amount of the Q-channel signal on the transmitting end relative to the I-channel signal and the time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal.
6. The determination method according to claim 1, wherein after the determination of the total time imbalance amount of the target wireless local area network system based on the time imbalance amount of the Q-way signal on the receiving side with respect to the I-way signal, the time imbalance amount of the I-way signal on the transmitting side, and the time imbalance amount of the Q-way signal on the transmitting side, the determination method further comprises:
Compensating the total time imbalance difference based on an integer multiple of sample number period and a fractional multiple of sample number period;
the integer multiple number of sample periods and the fraction multiple number of sample periods are determined by splitting the total time imbalance difference by integer multiple and fraction multiple.
7. The method of determining according to claim 6, wherein the compensating the total time imbalance difference amount based on an integer number of sample periods and a fractional number of sample periods for the Q-way signal comprises:
delaying the Q-channel signals by the integer multiple sample point number period number, and determining the Q-channel signals after compensating the integer multiple sample point period deviation;
determining a time domain response of the filter based on the order of the filter and the fractional number of sample point periods;
and carrying out convolution operation on the Q paths of signals after the compensation integer multiple sampling point period deviation based on the time domain response, and determining the Q paths of signals after compensation calibration.
8. A device for determining a wireless local area network I/Q time imbalance, the device comprising:
the cross-correlation calculation module is used for calculating the I-path signals and the Q-path signals with the same signal frequency domain on the transmitting end of the target wireless local area network system, and determining a first cross-correlation value of the I-path signals and a second cross-correlation value of the Q-path signals;
The transmitting end unbalance amount determining module is used for determining the time unbalance amount of the I path signal on the transmitting end and the time unbalance amount of the Q path signal on the transmitting end based on the first cross correlation value and the second cross correlation value;
the receiving end unbalance amount determining module is used for calculating the I path signal on the receiving end of the target wireless local area network system and the Q path signal on the receiving end and determining the time unbalance amount of the Q path signal on the receiving end relative to the I path signal;
the total time unbalance amount determining module is configured to determine a total time unbalance amount of the target wireless local area network system based on a time unbalance amount of the Q-channel signal on the receiving end relative to the I-channel signal, a time unbalance amount of the I-channel signal on the transmitting end, and a time unbalance amount of the Q-channel signal on the transmitting end.
9. An electronic device, comprising: a processor, a memory and a bus, said memory storing machine readable instructions executable by said processor, said processor and said memory communicating via said bus when the electronic device is running, said machine readable instructions when executed by said processor performing the steps of the method of determining an I/Q time imbalance of a wireless local area network according to any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the method for determining a wireless local area network I/Q time imbalance according to any one of claims 1 to 7.
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