CN108965559B - Method and device for wave calibration - Google Patents
Method and device for wave calibration Download PDFInfo
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- CN108965559B CN108965559B CN201710357354.5A CN201710357354A CN108965559B CN 108965559 B CN108965559 B CN 108965559B CN 201710357354 A CN201710357354 A CN 201710357354A CN 108965559 B CN108965559 B CN 108965559B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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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
Abstract
The embodiment of the invention relates to a fluctuation calibration method, which comprises the following steps: acquiring a signal coupled by a coupler, wherein the signal is a single-tone signal; measuring the signals coupled by the coupler through a wave detection port to obtain the power of each single tone signal; scanning a preset frequency band by preset steps to obtain a response curve of the preset frequency band; calculating the response curve to obtain a compensation value; and compensating the corresponding carrier according to the compensation value. The fluctuation calibration method and the device provided by the embodiment of the invention can reduce the cost, quickly calibrate the in-band flatness of the mobile phone, effectively improve the uplink transmission quality of the mobile phone and reduce the calibration time of a mobile phone factory.
Description
Technical Field
The invention relates to the technical field of fluctuation calibration, in particular to a method and a device for calibrating in-band fluctuation of an uplink of a mobile phone.
Background
In the era of mobile internet, the requirement on the communication rate of a mobile phone is higher and higher; the bandwidth of mobile phone communication is getting larger and larger from 200KHz of global mobile communication GSM to 1.2MHz of code division multiple access CDMA and then to 5MHz of wideband code division multiple access W-CDMA until the LTE is changed to 20 MHz; if the long term evolution LTE uses a Carrier Aggregation-CA (Carrier Aggregation-CA) technique, the continuous maximum bandwidth in the band reaches 80 MHz; the bandwidth of wireless local area networks WLAN is also evolving and increasing from 802.11b to 8020.11ac, increasing from 20MHz to 80MHz, and possibly even 160 MHz. In summary, the bandwidths of various communication schemes are increasingly wider, but the flatness within the bandwidth is increasingly poor. Flatness in the communication channel is mainly caused by power amplifiers, filters, etc. The main forms of the filter are a SAW surface acoustic wave filter, an antenna switch Duplexer, a Duplexer, and the like. This type of filter is mainly based on the surface acoustic wave principle, and is relatively impedance sensitive, so that in-band fluctuations are easily formed. The flatness within the bandwidth is increasingly poor and the worse the flatness in-band affects the quality of the communication and the level of power control.
In the existing scheme, a factory is required to be calibrated, and the factory is required to be provided with a matched instrument for measuring power, such as a power meter or a frequency spectrograph; meanwhile, extra time overhead is needed for factory calibration, and the test cost is increased; meanwhile, for mobile phones with large quantity, due to the production bottleneck of the production line of a factory, the problems of shortage and the like can be caused. Therefore, how to efficiently and low-cost solve the problem that the flatness in the band is poor due to the in-band fluctuation of the uplink of the mobile phone becomes a technical problem to be solved urgently.
Disclosure of Invention
Therefore, the invention provides a method and a device for calibrating fluctuation, which utilize a coupler and a power detection port which are arranged in a mobile phone to calibrate the fluctuation in the band, do not need to calibrate a factory additionally, and automatically calibrate when the mobile phone is started up each time, thereby saving the instrument cost and extra calibration time; meanwhile, calibration operation is carried out every time the mobile phone is started, so that the calibrated data are dynamic, and errors caused by mobile phone aging or temperature drift in the prior static calibration are overcome; the flatness in the mobile phone band can be calibrated quickly with low cost, the uplink emission quality of the mobile phone is effectively improved, and meanwhile, the calibration time of a mobile phone factory is reduced.
In order to achieve the above purpose, the invention provides the following technical scheme:
according to an aspect of the embodiments of the present invention, there is provided a ripple calibration method, including: acquiring a signal coupled by a coupler, wherein the signal is a single-tone signal;
measuring the signals coupled by the coupler through a wave detection port to obtain the power of each single tone signal;
scanning a preset frequency band by preset steps to obtain a response curve of the preset frequency band;
calculating the response curve to obtain a compensation value;
and compensating the corresponding carrier according to the compensation value.
After the calculation processing of the response curve, the method further comprises the following steps:
normalizing the result of the calculation processing of the response curve;
storing the normalization processing result into a non-volatile memory (NV);
acquiring a preset channel bandwidth, selecting the normalization processing result corresponding to the preset channel bandwidth, and performing normalization processing according to the maximum value.
After the calculation processing of the response curve, the method further comprises the following steps:
sending the result of the calculation processing of the response curve to a transmission power control unit (TPC);
the transmit power control unit tpc (transmit power control) performs calculation processing on a result of the calculation processing.
The preset step is 90 KHz.
The calculating the response curve comprises: and converting the response curve to the amplitude of a linear domain, wherein the amplitude of the linear domain is bandwidth-amplitude.
According to another aspect of the embodiments of the present invention, there is provided a ripple calibration apparatus including: the acquisition module is used for acquiring a signal coupled by the coupler, wherein the signal is a single-tone signal;
the measuring module is used for measuring the signals coupled by the coupler through the wave detection port to obtain the power of each single tone signal;
the scanning module is used for scanning a preset frequency band in preset steps to obtain a response curve of the preset frequency band;
the calculation module is used for calculating the response curve to obtain a compensation value;
and the compensation module is used for performing compensation processing on the corresponding carrier according to the compensation value.
The computing module further comprises: the normalization processing module is used for performing normalization processing on the result of the calculation processing on the response curve;
the storage module is used for storing the normalization processing result into a nonvolatile memory (NV);
acquiring a preset channel bandwidth, selecting the normalization processing result corresponding to the preset channel bandwidth, and performing normalization processing according to the maximum value.
The invention provides a wave calibration device, which further comprises: a sending module, configured to send the result of performing calculation processing on the response curve to a transmit power control unit TPC;
and the transmission power control unit TPC performs calculation processing on the result of the calculation processing.
The preset step is 90 KHz.
The calculating the response curve comprises: and converting the response curve to the amplitude of a linear domain, wherein the amplitude of the linear domain is bandwidth-amplitude.
According to the fluctuation calibration method and the device provided by the embodiment of the invention, the in-band fluctuation calibration is carried out by utilizing the coupler and the power wave detection port which are arranged in the mobile phone, no additional calibration in a factory is needed, and the calibration processing is automatically carried out when the mobile phone is started up every time, so that the instrument cost and the extra calibration time are saved; meanwhile, calibration operation is carried out every time the mobile phone is started, so that the calibrated data are dynamic, and errors caused by mobile phone aging or temperature drift in the prior static calibration are overcome; the flatness in the mobile phone band can be calibrated quickly with low cost, the uplink emission quality of the mobile phone is effectively improved, and meanwhile, the calibration time of a mobile phone factory is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary of the invention, and that other embodiments can be derived from the drawings provided by those skilled in the art without inventive effort.
FIG. 1 is a block diagram of a mobile phone signal transmitting system in the prior art;
FIG. 2 is a flow chart of a method for calibrating a ripple according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for calibrating a ripple according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method for calibrating ripple according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a ripple calibration apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a calculation module of the fluctuation calibration apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a block diagram of a signal transmission system of a mobile phone in the prior art. It can be seen that the signal transmission system of a common mobile phone is composed of a coupler, a filter, a power amplifier and a transceiver. The transceiver is provided with a Power detector (pdet), and normally, a signal coupled back from the coupler is mainly used for Power calibration and Power control. The embodiment of the invention calculates and processes the signals coupled back by the coupler through the detection port to obtain the compensation value, and performs corresponding compensation processing according to the compensation value to achieve the purpose of fluctuation calibration.
Fig. 2 is a flowchart of a fluctuation calibration method according to an embodiment of the present invention, which provides a fluctuation calibration method, including the steps of:
301 obtaining a coupler coupled signal, said signal being a single tone signal;
302 measuring the signals coupled by the coupler through a detection port to obtain the power of each single tone signal;
303, scanning a preset frequency band in preset steps to obtain a response curve of the preset frequency band;
304, carrying out calculation processing on the response curve;
307 obtaining a compensation value;
308, according to the compensation value, compensating the corresponding carrier.
Wherein the preset step is 90 KHz. The calculating the response curve comprises: and converting the response curve to the amplitude of a linear domain, wherein the amplitude of the linear domain is bandwidth-amplitude.
The in-band fluctuation calibration is carried out by utilizing the coupler and the power detection port which are arranged in the mobile phone, no additional calibration is needed in a factory, and the calibration processing is automatically carried out when the mobile phone is started up every time, so that the instrument cost and the extra calibration time are saved; meanwhile, calibration operation is carried out every time the mobile phone is started, so that the calibrated data are dynamic, and errors caused by mobile phone aging or temperature drift in the prior static calibration are overcome; the flatness in the mobile phone band can be calibrated quickly with low cost, the uplink emission quality of the mobile phone is effectively improved, and meanwhile, the calibration time of a mobile phone factory is reduced.
Fig. 3 is a flowchart of a fluctuation calibration method according to an embodiment of the present invention, which provides a fluctuation calibration method, including the steps of:
301 obtaining a coupler coupled signal, said signal being a single tone signal;
302 measuring the signals coupled by the coupler through a detection port to obtain the power of each single tone signal;
303, scanning a preset frequency band in preset steps to obtain a response curve of the preset frequency band;
304, carrying out calculation processing on the response curve;
305 normalizing the result of the calculation processing of the response curve; storing the normalization processing result into a non-volatile memory (NV); acquiring a preset channel bandwidth, selecting the normalization processing result corresponding to the preset channel bandwidth, and performing normalization processing according to the maximum value.
307 obtaining a compensation value;
308, according to the compensation value, compensating the corresponding carrier.
Wherein the preset step is 90 KHz. The calculating the response curve comprises: and converting the response curve to the amplitude of a linear domain, wherein the amplitude of the linear domain is bandwidth-amplitude.
The in-band fluctuation calibration is carried out by utilizing the coupler and the power detection port which are arranged in the mobile phone, no additional calibration is needed in a factory, and the calibration processing is automatically carried out when the mobile phone is started up every time, so that the instrument cost and the extra calibration time are saved; meanwhile, calibration operation is carried out every time the mobile phone is started, so that the calibrated data are dynamic, and errors caused by mobile phone aging or temperature drift in the prior static calibration are overcome; the flatness in the mobile phone band can be calibrated quickly with low cost, the uplink emission quality of the mobile phone is effectively improved, and meanwhile, the calibration time of a mobile phone factory is reduced.
Fig. 4 is a flowchart of a ripple calibration method according to another embodiment of the present invention, which provides a ripple calibration method, including the steps of:
301 obtaining a coupler coupled signal, said signal being a single tone signal;
302 measuring the signals coupled by the coupler through a detection port to obtain the power of each single tone signal;
303, scanning a preset frequency band in preset steps to obtain a response curve of the preset frequency band;
304, carrying out calculation processing on the response curve;
306 sending the result of calculation processing of the response curve to a transmit power control unit TPC; and the transmission power control unit TPC performs calculation processing on the result of the calculation processing.
307 obtaining a compensation value;
308, according to the compensation value, compensating the corresponding carrier.
Wherein the preset step is 90 KHz. The calculating the response curve comprises: and converting the response curve to the amplitude of a linear domain, wherein the amplitude of the linear domain is bandwidth-amplitude.
The in-band fluctuation calibration is carried out by utilizing the coupler and the power detection port which are arranged in the mobile phone, no additional calibration is needed in a factory, and the calibration processing is automatically carried out when the mobile phone is started up every time, so that the instrument cost and the extra calibration time are saved; meanwhile, calibration operation is carried out every time the mobile phone is started, so that the calibrated data are dynamic, and errors caused by mobile phone aging or temperature drift in the prior static calibration are overcome; the flatness in the mobile phone band can be calibrated quickly with low cost, the uplink emission quality of the mobile phone is effectively improved, and meanwhile, the calibration time of a mobile phone factory is reduced.
Fig. 5 is a schematic structural diagram of a ripple calibration apparatus according to an embodiment of the present invention, and the ripple calibration apparatus according to the embodiment of the present invention includes:
an obtaining module 401, configured to obtain a signal coupled by a coupler, where the signal is a single-tone signal;
a measuring module 402, configured to measure the signal coupled by the coupler through a detection port, so as to obtain a power of each single tone signal;
a scanning module 403, configured to scan a preset frequency band in preset steps to obtain a response curve of the preset frequency band;
a calculating module 404, configured to perform calculation processing on the response curve to obtain a compensation value;
and a compensation module 405, configured to perform compensation processing on a corresponding carrier according to the compensation value.
Wherein the preset step is 90 KHz. The calculating the response curve comprises: and converting the response curve to the amplitude of a linear domain, wherein the amplitude of the linear domain is bandwidth-amplitude.
The in-band fluctuation calibration is carried out by utilizing the coupler and the power detection port which are arranged in the mobile phone, no additional calibration is needed in a factory, and the calibration processing is automatically carried out when the mobile phone is started up every time, so that the instrument cost and the extra calibration time are saved; meanwhile, calibration operation is carried out every time the mobile phone is started, so that the calibrated data are dynamic, and errors caused by mobile phone aging or temperature drift in the prior static calibration are overcome; the flatness in the mobile phone band can be calibrated quickly with low cost, the uplink emission quality of the mobile phone is effectively improved, and meanwhile, the calibration time of a mobile phone factory is reduced.
Fig. 6 is a schematic structural diagram of a calculation module of the fluctuation calibration apparatus according to an embodiment of the present invention, where the calculation module 404 includes:
the normalization processing module is used for performing normalization processing on the result of the calculation processing on the response curve;
the storage module is used for storing the normalization processing result into a nonvolatile memory (NV);
acquiring a preset channel bandwidth, selecting the normalization processing result corresponding to the preset channel bandwidth, and performing normalization processing according to the maximum value.
The device also comprises a sending module used for sending the result of the calculation processing of the response curve to a transmission power control unit TPC.
And the transmission power control unit TPC performs calculation processing on the result of the calculation processing.
After the mobile phone is turned on, the modem units of the mobile phone send single-tone signals one by one, and the detection port sequentially measures the power (generally, voltage, which has a monotonic correspondence with power) of each single-tone signal coupled back by the coupler. The whole frequency band is scanned in steps of 90KHz to obtain the response curve (bandwidth-power) of the whole frequency band. The offset of the access channel is a minimum of 100KHz so that 90KHz steps meet the accuracy requirement.
After obtaining the response curve, the power in the logarithmic domain is converted into the amplitude (bandwidth-amplitude) in the linear domain, the reciprocal is calculated, the normalization is carried out, the amplitude value corresponding to the bandwidth is selected from the stored NV after the access channel is determined (namely after the bandwidth is determined) and stored in NV., and the normalization is carried out according to the maximum value. After normalization, the corresponding carriers are interpolated and then each subcarrier is compensated.
If the complexity of real-time calculation needs to be reduced, direct interpolation and compensation can be performed without normalization. The above steps are completed in the power detector, and finally the corresponding compensation value is calculated in the TPC (transmit power control) unit.
According to the fluctuation calibration method and device provided by the embodiment of the invention, the in-band fluctuation calibration is carried out by utilizing the coupler and the power wave detection port which are arranged in the mobile phone, no additional calibration in a factory is needed, and the calibration processing is automatically carried out when the mobile phone is started up every time, so that the instrument cost and the extra calibration time are saved; meanwhile, calibration operation is carried out every time the mobile phone is started, so that the calibrated data are dynamic, and errors caused by mobile phone aging or temperature drift in the prior static calibration are overcome; the flatness in the mobile phone band can be calibrated quickly with low cost, the uplink emission quality of the mobile phone is effectively improved, and meanwhile, the calibration time of a mobile phone factory is reduced.
The embodiment of the invention can reduce the cost of a factory; a feedback receiver is not needed, only a detector is needed (almost all mobile phones have the whole function), and a better index can still be achieved in a low-cost scheme. The problem of reducing the fluctuation in an uplink band is solved; improving the quality of the transmitted signal (EVM); and the start-up calibration reduces the time cost and the tool cost of factory calibration, thereby improving the efficiency. The in-band fluctuation of the mobile phone has influence on the quality of a transmitted signal; in-band fluctuation can also cause inaccurate uplink transmission power and influence closed-loop power control. The fluctuation calibration method and the fluctuation calibration device provided by the embodiment of the invention can perfectly solve the problems.
In addition, the effect achieved by the invention can be achieved by using a high-cost feedback receiver; the feedback receiver has complete IQ demodulation capability, and the power detector is a common carrier power detection unit.
The division of the modules and functions in the above embodiments of the present invention is schematic and representative, and is only a logical function division, and there may be other divisions and embodiments in actual implementation.
The division of the modules in the above embodiments of the present invention is schematic, and only one logical function division is provided, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by software (DSP) plus necessary general hardware platform, and of course, can also be implemented by hardware (ASIC). The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method of ripple calibration, comprising:
the method comprises the steps that when the mobile phone is started up every time, a signal coupled by a coupler is obtained, wherein the signal is a single-tone signal;
measuring the signals coupled by the coupler through a wave detection port to obtain the power of each single tone signal;
scanning a preset frequency band by preset steps to obtain a response curve of the preset frequency band;
calculating the response curve;
normalizing the result of the calculation processing of the response curve;
storing the normalization processing result into a non-volatile memory (NV);
acquiring a preset channel bandwidth, selecting the normalization processing result corresponding to the preset channel bandwidth, and performing normalization processing according to the maximum value;
obtaining a compensation value;
and compensating the corresponding carrier according to the compensation value.
2. The method of claim 1, wherein the computing the response curve further comprises:
sending the result of the calculation processing of the response curve to a transmission power control unit (TPC);
and the transmission power control unit TPC performs calculation processing on the result of the calculation processing.
3. The method of claim 1, wherein the predetermined step is 90 KHz.
4. The method according to any one of claims 1 to 2, wherein said computationally processing the response curve comprises: and converting the response curve to the amplitude of a linear domain, wherein the amplitude of the linear domain is bandwidth-amplitude.
5. A ripple calibration device, comprising:
the acquisition module is used for acquiring a signal coupled by the coupler when the mobile phone is started every time, wherein the signal is a single-tone signal;
the measuring module is used for measuring the signals coupled by the coupler through the wave detection port to obtain the power of each single tone signal;
the scanning module is used for scanning a preset frequency band in preset steps to obtain a response curve of the preset frequency band;
the calculation module is used for calculating the response curve to obtain a compensation value;
the compensation module is used for compensating the corresponding carrier according to the compensation value;
the computing module further comprises:
the normalization processing module is used for performing normalization processing on the result of the calculation processing on the response curve;
the storage module is used for storing the normalization processing result into a nonvolatile memory (NV);
acquiring a preset channel bandwidth, selecting the normalization processing result corresponding to the preset channel bandwidth, and performing normalization processing according to the maximum value.
6. The apparatus of claim 5, further comprising:
a sending module, configured to send the result of performing calculation processing on the response curve to a transmit power control unit TPC;
and the transmission power control unit TPC performs calculation processing on the result of the calculation processing.
7. The apparatus of claim 5, wherein the predetermined step is 90 KHz.
8. The apparatus according to any one of claims 5 to 6, wherein said performing calculation processing on said response curve comprises: and converting the response curve to the amplitude of a linear domain, wherein the amplitude of the linear domain is bandwidth-amplitude.
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| CN101453276B (en) * | 2007-12-04 | 2013-04-24 | 京信通信系统（中国）有限公司 | Detection system for repeater product radio frequency performance, and detection method thereof |
| CN101383666B (en) * | 2008-09-25 | 2012-02-29 | 中兴通讯股份有限公司 | Power calibrating method suitable for multiple signal bandwidth |
| CN101369835B (en) * | 2008-10-14 | 2013-04-24 | 华为终端有限公司 | Gain compensation method and device of wireless terminal |
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