CN115021835B - IQ imbalance correction method, communication equipment and storage device - Google Patents
IQ imbalance correction method, communication equipment and storage device Download PDFInfo
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- CN115021835B CN115021835B CN202110247232.7A CN202110247232A CN115021835B CN 115021835 B CN115021835 B CN 115021835B CN 202110247232 A CN202110247232 A CN 202110247232A CN 115021835 B CN115021835 B CN 115021835B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- 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
Abstract
The application discloses an IQ imbalance correction method, communication equipment and a storage device. The method comprises the following steps: transmitting a first test signal of a target frequency band by using a transmitting link of the communication device; receiving the first test signal by using a receiving link of the communication equipment to obtain a second test signal of the target frequency band; obtaining a first IQ correction parameter of the target frequency band based on the second test signal of the target frequency band; and performing IQ imbalance correction of the target frequency band by using the first IQ correction parameter of the target frequency band. By adopting the scheme, IQ imbalance correction can be realized, and the cost of IQ imbalance correction is reduced.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to an IQ imbalance correction method, a communications device, and a storage device.
Background
In the field of communication equipment, for example, a zero intermediate frequency transceiver is used in more and more application scenes due to advantages of simple structure, low power consumption, low cost, high integration and the like. But the IQ imbalance problem of zero-if transceivers becomes an obstacle limiting their application. The amplitude or phase error exists between the two paths I and Q of the IQ, so that IQ imbalance is caused, the signal transmission quality is reduced, and the transceiver performance is affected. At present, an auxiliary correction device arranged outside the communication device is used for correcting the IQ imbalance, additional detection and analysis auxiliary devices are needed, the correction cost is high, and the IQ imbalance correction efficiency is low.
Disclosure of Invention
The application mainly solves the technical problem of providing an IQ imbalance correction method, communication equipment and a storage device, which can realize IQ imbalance correction and reduce the cost of IQ imbalance correction.
In order to solve the above problems, a first aspect of the present application provides an IQ imbalance correction method. The method comprises the following steps: transmitting a first test signal of a target frequency band by using a transmitting link of the communication device; receiving the first test signal by using a receiving link of the communication equipment to obtain a second test signal of the target frequency band; obtaining a first IQ correction parameter of the target frequency band based on the second test signal of the target frequency band; and performing IQ imbalance correction of the target frequency band by using the first IQ correction parameter of the target frequency band.
In order to solve the above-described problems, a second aspect of the present application provides a communication device including a memory and a processor coupled to each other, the memory storing program data therein, the processor being configured to execute the program data to implement any one of the steps of the IQ imbalance correction method described above.
In order to solve the above-described problems, a third aspect of the present application provides a storage device storing program data that can be executed by a processor, the program data being used to implement any one of the steps of the above-described IQ imbalance correction method.
According to the scheme, the first test signal of the target frequency band is transmitted by the transmitting link of the communication equipment, the first test signal is received by the receiving link of the communication equipment to obtain the second test signal of the target frequency band, the first IQ correction parameter of the target frequency band is obtained based on the second test signal of the target frequency band, and IQ imbalance correction of the target frequency band is carried out by the first IQ correction parameter of the target frequency band.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings required in the description of the embodiments will be briefly described below, it being obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic structural view of a first embodiment of the communication device of the present application;
fig. 2 is a schematic structural view of a second embodiment of the communication device of the present application;
FIG. 3 is a flowchart of a first embodiment of an IQ imbalance correction method according to the present application;
FIG. 4 is a flowchart of a second embodiment of the IQ imbalance correction method according to the present application;
FIG. 5 is a signal FFT diagram illustrating IQ signal imbalance correction according to a previous embodiment of the present application;
FIG. 6 is a diagram illustrating a signal constellation of the IQ signal imbalance correction according to the previous embodiment of the present application;
FIG. 7 is a flowchart illustrating the step S46 of FIG. 4 according to an embodiment of the present application;
FIG. 8 is a signal FFT diagram illustrating an IQ signal imbalance correction according to the later embodiment of the application;
FIG. 9 is a diagram illustrating a signal constellation according to the embodiment of the IQ signal imbalance correction of the present application;
fig. 10 is a schematic structural view of a third embodiment of the communication device of the present application;
FIG. 11 is a schematic diagram of a memory 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 apparent, 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 is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first" and "second" in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
The following describes embodiments of the present application in detail with reference to the drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a communication device according to the present application. The communication device 10 comprises a transmit chain 11, a receive chain 12, a digital processor 13 and a coupling circuit 14. The transmitting link 11 and the receiving link 12 are respectively connected with the digital processor 13, the coupling circuit 14 is respectively connected with the transmitting link 11 and the receiving link 12, and the receiving link 12 can receive the frequency band signal transmitted by the transmitting link 11. The communication device 10 may be a communication transceiver, such as a zero intermediate frequency transceiver, a superheterodyne transceiver, a low intermediate frequency transceiver, etc., the present application being described with respect to the communication device 10 being a zero intermediate frequency transceiver.
The transmission link 11 of the communication device 10 is arranged to transmit a first test signal of the target frequency band. The coupling circuit 14 is configured to couple the first test signal of the target frequency band transmitted by the receiving and transmitting link 11 to the receiving link 12. The receiving link 12 of the communication device 10 is configured to receive the first test signal, and process the received first test signal to obtain a second test signal of the target frequency band. The second test signal is sent to the digital processor 13, so that the digital processor 13 obtains the first IQ correction parameter of the target frequency band based on the second test signal of the target frequency band, and carries out IQ imbalance correction of the target frequency band by using the first IQ correction parameter of the target frequency band.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a second embodiment of the communication device of the present application. The communication device 20 comprises a transmit chain 21, a receive chain 22, a digital processor 23 and a control switch 24. The transmitting link 21 and the receiving link 22 are respectively connected with the digital processor 23, and the receiving link 22 can receive the frequency band signal transmitted by the transmitting link 21.
The transmitting chain 21 includes a frequency generator 211 (Frequency Generating Unit, FGU for short), a Digital-to-Analog Converter (DAC for short), and a Power Amplifier 213 (PA for short), the frequency generator 211 is connected to the Digital-to-Analog Converter 212 and the Power Amplifier 213, and the Power Amplifier 213 of the transmitting chain 21 may be connected to the control switch 24. In addition, a phase-locked loop 214 (Phase Locked Loop, PLL for short) is also included between the digital processor 23 and the frequency generator 211 in the transmission link 21, and the phase-locked loop 214 is connected to the frequency generator 211.
The receiving chain 22 includes a Band Pass Filter 221 (BPF), a Low Noise Amplifier 222 (LAN), a mixer 223, a phase differentiator 224, a local oscillator 225, a first Low Pass Filter 226 (LPF), and an Analog-to-digital converter 227 (ADC). The first low-pass filter 226 further includes a programmable gain amplifier (Programmable Gain Amplifier, abbreviated as PGA), and the first low-pass filter 226 may be a low-pass filter combined with the programmable gain amplifier; the analog-to-digital converter 227 further includes a digital Filter (D-Filter), and the analog-to-digital converter 227 may be a combination of the analog-to-digital converter and the digital Filter. The band-pass filter 221 may be connected to the control switch 24, and the mixer 223, the first low-pass filter 226, and the analog-to-digital converter 227 are sequentially connected to the digital processor 23.
The control switch 24 includes a transmitting end 241 and a receiving end 242. Wherein, the transmitting end 241 is connected with the transmitting link 21, the receiving end 242 is connected with the receiving link 22, and the transmitting link 21 or the receiving link 22 can be switched on by switching the transmitting end 241 or the receiving end 242 of the control switch 24.
In addition, the communication device 20 further comprises an antenna assembly 25, wherein the antenna assembly 25 is connected to the control switch 24. Wherein the antenna assembly 25 comprises an antenna 251 and a second low-pass filter 252, the antenna 251 is connected to the second low-pass filter 252, such that the second low-pass filter 252 is connected to the control switch 24.
In addition, an SPI interface 26 (Serial Peripheral Interface ) is also provided between the digital processor 23 and the receiving link 22, and can be used for data transmission between the digital processor 23 and the receiving link 22.
Specifically, the digital-to-analog converter 212 may be used to process the signal of the target frequency band without debugging, so as to convert the digital signal into an analog signal, send the processed signal to the frequency generator 211 for modulation and superposition, so as to oscillate the signal into a transmitting radio frequency signal, amplify the transmitting radio frequency signal by the power amplifier 213 to obtain a first test signal of the target frequency band, and switch the control switch 24 to the transmitting end 241, so as to transmit the first test signal of the target frequency band signal through the antenna assembly 25.
In addition, the antenna assembly 25 may also receive the first test signal in the target frequency band, switch the control switch 24 to the receiving end 242, transmit the first test signal to the receiving link 22, select the signal in the specific frequency band to pass through the band-pass filter 221, limit the signal in the other frequency band to pass through, and amplify the first test signal in the target frequency band by using the low noise amplifier 222. The amplified first test signal of the target frequency band is demodulated by the mixer 223, the phase differentiator 224 and the local oscillator 225, and a demodulated IQ signal is obtained. The IQ signal includes an I-path signal and a Q-path signal, the IQ signal is an In-Phase and Quadrature signal, and the I-path signal and the Q-path signal are 90 degrees out of Phase. The first low-pass filter 226 and the analog-to-digital converter 227 are adopted to obtain a second test signal of the target frequency band, that is, an IQ signal through filtering, gain amplification, analog-to-digital conversion and the like. The second test signal is transmitted to the digital processor 23 for processing.
In some embodiments, the communication device 20 further includes a first control circuit 27 and a second control circuit 28. Wherein the first control circuit 27 and/or the second control circuit 28 may be control lines. The first control circuit 27 is connected with the digital processor 23 and the control switch 24, and the first control circuit 27 can be used as an auxiliary circuit for transmitting control signals; the second control circuit 28 is connected to the digital processor 23 and the low noise amplifier 222, and the second control circuit 28 may be used as an auxiliary circuit for transmitting control signals. Using the digital processor 23, the first control circuit 27 can generate a first switch control signal T/R to control the switch 24 to be turned on or off; with the digital processor 23, the second control circuit 28 generates the second switch control signal lna_en, which can control the low noise amplifier 222 to be turned on or off.
Optionally, during the process of correcting IQ imbalance, for example, when the first test signal of the target frequency band is transmitted by using the transmitting link 21 of the communication device 20, the first switch control signal of the first control circuit 27 and/or the second switch control signal of the second control circuit 28 are in a high level state, the control switch 24 is connected to the transmitting terminal 241, and the low noise amplifier 222 in the receiving link 22 is in an off state. When IQ imbalance correction is not performed, or when the receiving link 22 of the communication device 20 is used to receive the first test signal and obtain the second test signal of the target frequency band, the first switch control signal of the first control circuit 27 and/or the second switch control signal of the second control circuit 28 may be in a low level state, the control switch 24 is connected to the receiving end 242, and the low noise amplifier 222 in the receiving link 22 is in an on state. Wherein the high state is a high level relatively higher than the low state.
Referring to fig. 1 to 3, fig. 3 is a flowchart illustrating a first embodiment of an IQ imbalance correction method according to the present application. The method comprises the following steps:
s31: a first test signal of a target frequency band is transmitted using a transmit chain of the communication device.
The communication device may be a communication transceiver, such as a zero intermediate frequency transceiver, a superheterodyne transceiver, a low intermediate frequency transceiver, etc., and the present application is described by taking the communication device as a zero intermediate frequency transceiver as an example. The signal frequency band to be corrected can be selected as a target frequency band, a transmitting link is started, and the transmitting link of the communication equipment is utilized to process the target frequency band to obtain a first test signal so as to transmit the first test signal of the target frequency band by utilizing the reflecting link.
S32: and receiving the first test signal by using a receiving link of the communication equipment to obtain a second test signal of the target frequency band.
And starting a receiving link, and receiving the first test signal by using the receiving link of the communication equipment so as to process the first test signal by using the receiving link to obtain a second test signal of the target frequency band. The IQ signal, i.e., the I-path signal and the Q-path signal, may be obtained based on the second test signal.
S33: and obtaining a first IQ correction parameter of the target frequency band based on the second test signal of the target frequency band.
After the second test signal of the target frequency band is obtained, based on the obtained IQ signal, the first IQ correction parameter of the target frequency band can be obtained according to the phase difference of the I-path signal and the Q-path signal. The IQ signal includes an I-path signal and a Q-path signal, the IQ signal is an In-Phase and Quadrature signal, and the I-path signal and the Q-path signal are 90 degrees out of Phase.
S34: and performing IQ imbalance correction of the target frequency band by using the first IQ correction parameter of the target frequency band.
The first IQ correction parameters of the first target frequency band may be stored in the communication device such that IQ imbalance correction of the target frequency band is performed using the first IQ correction parameters of the target frequency band. In addition, the information of the target frequency band corresponding to the first IQ correction parameter can be stored, and the first IQ correction parameter is used as a standby correction parameter for IQ imbalance correction of the target frequency band.
In this embodiment, a first test signal of a target frequency band is transmitted by using a transmitting link of a communication device, then the first test signal is received by using a receiving link of the communication device to obtain a second test signal of the target frequency band, a first IQ correction parameter of the target frequency band is obtained based on the second test signal of the target frequency band, and IQ imbalance correction of the target frequency band is performed by using the first IQ correction parameter of the target frequency band.
Referring to fig. 1, 2 and 4, fig. 4 is a flowchart illustrating a IQ imbalance correction method according to a second embodiment of the present application. The method comprises the following steps:
s41: dividing a receiving frequency band of a receiving link into a plurality of sub-frequency bands, and taking each sub-frequency band as a target frequency band.
The receiving frequency band of the receiving link is divided into a plurality of sub-frequency bands, the receiving frequency band can be divided into a plurality of sub-frequency bands according to the preset frequency band width, the receiving frequency band can be divided into a plurality of sub-frequency bands according to the preset frequency band number, and any word frequency band can be used as a target frequency band. When IQ imbalance correction is performed on the received frequency band, each sub-band may be respectively used as a target frequency band. For example, the receiving frequency band is 350-400 MHz, and the receiving frequency band can be divided into 5 sub-frequency bands, wherein the sub-frequency bands are 350-360 MHz, 360-370 MHz, 370-380 MHz, 380-390 MHz and 390-400 MHz. For example, the first segment sub-band 350-360 MHz is selected as the target band.
S42: a first test signal of a target frequency band is transmitted using a transmit chain of the communication device.
Specifically, transmitting, by using a transmission link of the communication device, a first test signal of a target frequency band, including: and acquiring a center frequency point of the target frequency band to serve as a frequency point of the first test signal. For example, when the sub-band is 350-360 MHz as the target band, the center frequency point of the target band is 355MHz, that is, the channel is set, and the center frequency point is used as the frequency point of the first test signal of the target band.
The switch is connected to the transmit chain by a first switch control signal T/R of the first control circuit, the turn-off of the low noise amplifier is controlled by a second switch control signal lna_en of the second control circuit, and the transmit chain is set to a low power mode. For example, the low power mode is a mode in which the digital processor controls the transmit power of the transmit chain to be 1w power. And transmitting the first test signal by using the transmitting link based on the frequency point of the first test signal.
Optionally, before step S44, the following steps may be further included:
s43: and detecting the transmitted signal strength of the first test signal transmitted by the transmitting link, and judging whether the transmitted signal strength is smaller than or equal to a first preset threshold value.
Where the transmit signal strength (Received Signal Strength Indicator, RSSI for short) is the wideband receive power over the bandwidth of the transmit or receive channel of the communication device. And detecting the transmitted signal strength of the first test signal transmitted by the transmitting link, and judging whether the transmitted signal strength is smaller than or equal to a first preset threshold value. For example, the intensity of the transmitted field of the first test signal transmitted by the transmitting link, the intensity of the transmitted power and the like are detected, and whether the intensity of the transmitted signal is less than or equal to 50dB is judged.
In correcting IQ imbalance, a closed loop is formed between a transmission link and a reception link in a communication device to correct the IQ imbalance without using an additional device. Detecting the intensity of a transmission signal of a first test signal transmitted by the transmission link, and when the intensity of the transmission signal is smaller than or equal to a first preset threshold value, receiving the first test signal of the target frequency band by the receiving link, so that the power between the power of the transmission link and the power of the receiving link is controlled, and the damage to the receiving link caused by the overlarge power of the signal transmitted by the transmission link can be prevented.
In step S43, if yes, the transmitted signal strength is less than or equal to the first preset threshold, step S44 is performed.
If no in step S43, the process continues to step S41, or the flow ends, and the present application will be described taking the process of continuing to step S41 as an example.
S44: and receiving the first test signal by using a receiving link of the communication equipment to obtain a second test signal of the target frequency band.
And starting a receiving link, and receiving the first test signals for a preset number of times by using the receiving link of the communication equipment to obtain a preset number of second test signals of the target frequency band. That is, the receiving link is used to collect a preset number of second test signals to obtain a preset number of IQ signals. Wherein the preset number is an integer equal to or greater than 1.
Specifically, the first test signal is filtered and amplified by a band-pass filter and a low noise amplifier of the receiving link to obtain a preprocessed second test signal. And then demodulating, filtering, gain amplifying and analog-to-digital converting the second test signal of the target frequency band by using a phase differentiator, a mixer, a local oscillator, a low-pass filter and an analog-to-digital converter in the receiving link, so as to obtain an IQ signal. The IQ signal includes an I-path signal and a Q-path signal, the IQ signal is an In-Phase and Quadrature signal, and the I-path signal and the Q-path signal are 90 degrees out of Phase. The IQ signal may be transmitted to a digital processor for processing.
Fig. 5 to 6 show a signal FFT of an IQ signal imbalance correction prior embodiment of the present application, and fig. 6 shows a signal constellation of an IQ signal imbalance correction prior embodiment of the present application. For example, the resulting IQ signal is unbalanced, as shown in fig. 5-6, with deviations in phase and amplitude of the IQ signal. In the FFT chart, the signal frequency band with two waveforms has the same bandwidth as the IQ signal frequency band, but the waveform signals with different phases can be called image signals, namely interference signals, the image signals can deteriorate adjacent channel interference or block interference, and when the communication equipment is a zero intermediate frequency transceiver, the same channel interference can be deteriorated, the signal to noise ratio can be reduced, or the error rate can be improved, so that the communication quality and performance of the communication equipment can be reduced. In the constellation diagram, the IQ constellation diagram is not a standard circle, that is, the phase and the amplitude of the IQ signal are different. The imbalance of IQ signals may cause an increase in error rate or a decrease in signal-to-noise ratio of the communication device, thereby reducing communication quality and performance of the communication device.
S45: and obtaining a first IQ correction parameter of the target frequency band based on the second test signal of the target frequency band.
Based on the phase difference between the IQ signals, a first IQ correction parameter is obtained. And acquiring a preset number of second test signals of the target frequency band, so that a preset number of IQ signals can be obtained, and based on the phase difference between each group of IQ signals of the target frequency band, obtaining a first IQ correction parameter of each group of IQ signals of the target frequency band. Each second test signal correspondingly obtains a first IQ correction parameter, and the preset number is an integer equal to or greater than 1.
S46: and performing IQ imbalance correction of the target frequency band by using the first IQ correction parameter of the target frequency band.
Optionally, referring to fig. 7, step S46 includes the steps of:
s461: and obtaining second IQ correction parameters of the target frequency band based on the preset number of first IQ correction parameters of the target frequency band.
Based on the phase deviation of the I-path signals and the Q-path signals in the preset number of IQ-path signals of the target frequency band, the obtained preset number of first IQ correction parameters are imbalance values of the IQ signals. Obtaining the average value of the preset number of first IQ correction parameters, and taking the average value of the preset number of first IQ correction parameters as the second IQ correction parameters of the target frequency band.
S462: and performing IQ imbalance correction of the target frequency band by using the second IQ correction parameter of the target frequency band.
And taking the average value of the preset number of first IQ correction parameters, namely the second IQ correction parameters, as an imbalance value of the IQ signals of the target frequency band, and carrying out IQ imbalance correction on the target frequency band by utilizing the second IQ correction parameters of the target frequency band.
Specifically, the phase deviation of the phase differentiator in the receiving link in the target frequency band may be set by the digital processor based on the second IQ correction parameter, and the second IQ correction parameter may be set as an IQ imbalance value of the phase differentiator, so as to perform IQ imbalance correction on the target frequency band. In addition, the second IQ correction parameter of the target frequency band can be saved to be used as a standby IQ correction parameter.
Fig. 8 to 9 show a signal FFT of an IQ signal imbalance correction according to the present application, and fig. 9 shows a signal constellation of an IQ signal imbalance correction according to the present application. In the FFT graph, no image signal exists in the corrected IQ signal, so that the image interference signal of the IQ signal is well restrained, and the image rejection ratio is effectively improved; in addition, in the constellation diagram, the corrected IQ constellation diagram is shown as a standard circle, that is, the phase and amplitude of the IQ signal are the same, the phase and amplitude deviation of the IQ signal is zero, and the IQ signal after the imbalance correction is balanced. After the IQ signal is subjected to unbalance correction, the deviation of the phase and the amplitude of the IQ signal is obviously reduced, the image rejection ratio is effectively improved, and the IQ signal can be effectively subjected to unbalance correction.
For the implementation of this embodiment, reference may be made to the implementation process of the foregoing embodiment, which is not described herein.
In this embodiment, different from the above embodiment, the receiving frequency band of the receiving link is divided into a plurality of sub-frequency bands, each sub-frequency band is used as a target frequency band, IQ imbalance correction is performed on each target frequency band, so that the difference of IQ imbalance between different frequency bands can be solved, IQ imbalance is corrected by adopting unused IQ correction parameters for different target frequency bands, and IQ imbalance correction accuracy is improved; in addition, for the same target frequency band, the first test signals are received for a preset number of times by utilizing the receiving link of the communication equipment to obtain a preset number of second test signals of the target frequency band, so that IQ signals are acquired for a plurality of times for the same target frequency band, a preset number of first IQ correction parameters are obtained through a plurality of times of processing, IQ imbalance correction of the target frequency band is performed by utilizing the average value of the preset number of first IQ correction parameters, reliability of the IQ correction parameters can be improved, and accuracy of the IQ imbalance correction is further improved.
In addition, because the IQ imbalance correction is carried out by utilizing a closed-loop circuit of the communication equipment, no additional auxiliary instrument is needed, the flexibility of IQ imbalance correction is improved, and the IQ imbalance correction cost is reduced; meanwhile, compared with the emission of the target frequency band through the signal source instrument, the emission link replaces the previous signal source instrument, and the emission link emits the target frequency band, so that IQ imbalance correction can be calibrated in real time, namely, IQ imbalance can be corrected in real time.
For the foregoing embodiments, the present application provides a communication device, please refer to fig. 10, and fig. 10 is a schematic structural diagram of a third embodiment of the communication device of the present application. The communication device 100 comprises a memory 101 and a processor 102, wherein the memory 101 and the processor 102 are coupled to each other, the memory 101 stores program data, and the processor 102 is configured to execute the program data to implement the steps of any of the embodiments of the IQ imbalance correction method described above.
In this embodiment, the processor 102 may also be referred to as a CPU (Central Processing Unit ). The processor 102 may be an integrated circuit chip having signal processing capabilities. Processor 102 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor 102 may be any conventional processor or the like.
For the implementation of this embodiment, reference may be made to the implementation process of the foregoing embodiment, which is not described herein.
For the method of the above embodiment, which can be implemented in the form of a computer program, the present application proposes a storage device, please refer to fig. 11, fig. 11 is a schematic structural diagram of an embodiment of the storage device of the present application. The memory device 200 stores program data 201 that can be executed by a processor, and the program data can be executed by the processor to implement the steps of any of the embodiments of the IQ imbalance correction method described above.
For the implementation of this embodiment, reference may be made to the implementation process of the foregoing embodiment, which is not described herein.
The storage device 200 of this embodiment may be a medium that may store program data, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or may be a server that stores the program data, and the server may send the stored program data to another device for running, or may also self-run the stored program data.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., 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 an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical, or other forms.
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 over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional unit in the embodiments 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 integrated units may be implemented in hardware or in software functional units.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a storage device, which is a computer readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in part or all or part of the technical solution contributing to the prior art or in the form of a software product stored in a storage medium, comprising several instructions for causing a communication device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the method of the embodiments of the present application.
It will be apparent to those skilled in the art that the modules or steps of the application described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, or they may alternatively be implemented in program code executable by computing devices, such that they may be stored in a memory device for execution by the computing devices, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module. Thus, the present application is not limited to any specific combination of hardware and software.
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.
Claims (8)
1. An IQ imbalance correction method, the method comprising:
dividing a receiving frequency band of a receiving link of the communication equipment into a plurality of sub-frequency bands, and taking each sub-frequency band as a target frequency band;
connecting a switch to a transmit chain using a first switch control signal of a first control circuit of the communication device, and controlling a low noise amplifier to turn off using a second switch control signal of a second control circuit of the communication device;
transmitting a first test signal of the target frequency band by using a transmitting link of the communication equipment;
connecting a switch to a receiving link by using a first switch control signal of a first control circuit of the communication device, and controlling a low noise amplifier to be turned on by using a second switch control signal of a second control circuit of the communication device;
receiving the first test signals for a preset number of times by utilizing a receiving link of the communication equipment to obtain a preset number of second test signals of the target frequency band; the preset number is an integer equal to or greater than 1;
obtaining first IQ correction parameters of the target frequency band based on second test signals of the target frequency band, wherein each second test signal correspondingly obtains one first IQ correction parameter;
obtaining second IQ correction parameters of the target frequency band by using a preset number of first IQ correction parameters of the target frequency band;
and performing IQ imbalance correction of the target frequency band by using the second IQ correction parameter of the target frequency band.
2. The method of claim 1 wherein said performing IQ imbalance correction for the target frequency band using the second IQ correction parameter for the target frequency band comprises:
setting the phase deviation of a phase differentiator in the receiving link in the target frequency band based on the second IQ correction parameter;
and/or, the method further comprises:
and saving a second IQ correction parameter of the target frequency band.
3. The method of claim 1, wherein the obtaining the second IQ correction parameters for the target frequency band based on the preset number of first IQ correction parameters for the target frequency band comprises:
and taking the average value of the preset number of first IQ correction parameters as a second IQ correction parameter of the target frequency band.
4. The method of claim 1, wherein the deriving the first IQ correction parameter for the target frequency band based on the second test signal for the target frequency band comprises:
processing the second test signal of the target frequency band by using a phase differentiator in the receiving link to obtain an IQ signal;
and obtaining the first IQ correction parameter based on the phase difference of the IQ signals.
5. The method of claim 1, wherein transmitting the first test signal for the target frequency band using a transmit chain of a communication device comprises:
acquiring a center frequency point of the target frequency band to serve as a frequency point of the first test signal;
and transmitting the first test signal by using the transmitting link based on the frequency point of the first test signal.
6. The method of claim 1, wherein prior to said receiving the first test signal a predetermined number of times with the receiving link of the communication device to obtain a predetermined number of second test signals for the target frequency band, the method further comprises:
detecting the transmission signal strength of the first test signal transmitted by the transmission link;
and if the strength of the transmitting signal is smaller than or equal to a first preset threshold value, executing the preset number of times of receiving the first test signals by using the receiving link of the communication equipment to obtain the preset number of second test signals of the target frequency band.
7. A communication device comprising a memory and a processor coupled to each other, the memory having stored therein program data, the processor being adapted to execute the program data to implement the steps of the method of any of claims 1 to 6.
8. A storage device storing program data executable by a processor for implementing the steps of the method of any one of claims 1 to 6.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001016145A (en) * | 1999-07-01 | 2001-01-19 | Mitsubishi Electric Corp | Frequency characteristics corrector for radio communication equipment |
| CN102035561A (en) * | 2009-09-25 | 2011-04-27 | 英特尔公司 | Calibration of quadrature imbalance via loopback phase shifts |
| CN103765841A (en) * | 2011-07-03 | 2014-04-30 | Dsp集团有限公司 | Apparatus and method for correcting IQ imbalance |
| CN104753544A (en) * | 2013-12-29 | 2015-07-01 | 展讯通信（上海）有限公司 | Power calibration method and system for radio frequency receiver of terminal |
| CN107317588A (en) * | 2016-04-26 | 2017-11-03 | 美国亚德诺半导体公司 | The apparatus and method of broadband receivers |
| CN110708084A (en) * | 2019-10-15 | 2020-01-17 | 成都振芯科技股份有限公司 | Envelope detection based originating IQ correction circuit and method |
| CN112187293A (en) * | 2015-12-17 | 2021-01-05 | 华为技术有限公司 | Method for determining correction parameters of zero intermediate frequency wireless receiver and zero intermediate frequency wireless receiver |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9166707B2 (en) * | 2012-03-28 | 2015-10-20 | Panasonic Corporation | Transmitter, signal generation device, calibration method, and signal generation method |
| US9356732B2 (en) * | 2013-03-15 | 2016-05-31 | Analog Devices, Inc. | Quadrature error detection and correction |
-
2021
- 2021-03-05 CN CN202110247232.7A patent/CN115021835B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001016145A (en) * | 1999-07-01 | 2001-01-19 | Mitsubishi Electric Corp | Frequency characteristics corrector for radio communication equipment |
| CN102035561A (en) * | 2009-09-25 | 2011-04-27 | 英特尔公司 | Calibration of quadrature imbalance via loopback phase shifts |
| CN103765841A (en) * | 2011-07-03 | 2014-04-30 | Dsp集团有限公司 | Apparatus and method for correcting IQ imbalance |
| CN104753544A (en) * | 2013-12-29 | 2015-07-01 | 展讯通信（上海）有限公司 | Power calibration method and system for radio frequency receiver of terminal |
| CN112187293A (en) * | 2015-12-17 | 2021-01-05 | 华为技术有限公司 | Method for determining correction parameters of zero intermediate frequency wireless receiver and zero intermediate frequency wireless receiver |
| CN107317588A (en) * | 2016-04-26 | 2017-11-03 | 美国亚德诺半导体公司 | The apparatus and method of broadband receivers |
| CN110708084A (en) * | 2019-10-15 | 2020-01-17 | 成都振芯科技股份有限公司 | Envelope detection based originating IQ correction circuit and method |
Non-Patent Citations (4)
| Title |
|---|
| Frequency Domain IQ Correction in a Direct conversion Receiver for DVB-T;R. B. Palipana;《2005 Asia-Pacific Conference on Communications》;全文 * |
| MB-OFDM UWB接收机IQ不平衡和载波频偏的联合估计与补偿;任世杰;《北京理工大学学报》;全文 * |
| 宽带相控阵雷达发射多波束形成和雷达通信一体化技术研究;岳寅;《中国博士学位论文全文数据库信息科技辑》;全文 * |
| 龙柯宇.宽带雷达信号侦察接收机关键技术研究.《中国优秀硕士学位论文全文数据库信息科技辑》.2012,全文. * |
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