WO2021023155A1 - Procédé de compensation de gain - Google Patents

Procédé de compensation de gain Download PDF

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Publication number
WO2021023155A1
WO2021023155A1 PCT/CN2020/106583 CN2020106583W WO2021023155A1 WO 2021023155 A1 WO2021023155 A1 WO 2021023155A1 CN 2020106583 W CN2020106583 W CN 2020106583W WO 2021023155 A1 WO2021023155 A1 WO 2021023155A1
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Prior art keywords
frequency
dsp module
band
compensation data
frequency band
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PCT/CN2020/106583
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English (en)
Chinese (zh)
Inventor
简托
褚如龙
沈滨
任爱林
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三维通信股份有限公司
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Publication of WO2021023155A1 publication Critical patent/WO2021023155A1/fr

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    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators

Definitions

  • This application relates to the field of radio frequency communication technology, and in particular to a gain compensation method.
  • the gain of the radio frequency chip will change with the change of the working frequency of the transceiver.
  • gain can be considered as a function of frequency difference.
  • the gain In order to accurately obtain the actual effective output gain, the gain must be frequency compensated.
  • the digital signal processing module of a wide-band radio frequency transceiver can be connected to radio frequency signal processing modules of different frequency bands to achieve support for the wide frequency band. Due to the difference in frequency gain between the digital signal processing module and the radio frequency signal processing module, the use of pre-calibrated power for gain compensation is prone to large errors.
  • a gain compensation method is provided, which is applied to a radio frequency transceiver.
  • the radio frequency transceiver includes a digital signal processing DSP module and a radio frequency RF module connected to each other.
  • the method includes: acquiring The working frequency band of the RF module; configure the link of the DSP module to a frequency band corresponding to the working frequency band of the RF module, and obtain the gain compensation data that is stored in the DSP module in advance and corresponds to the working frequency band of the DSP module;
  • the gain compensation data corresponding to the working frequency band of the DSP module performs gain compensation on the DSP module.
  • the gain compensation can be effectively reduced Error.
  • the gain compensation data includes: the output power corresponding to the working frequency band of the DSP module, the calibration frequency band, and the output power corresponding to the calibration frequency band, and the use of the gain compensation corresponding to the working frequency band of the DSP module
  • the data compensates the gain of the DSP module, including:
  • the output power corresponding to the working frequency band of the DSP module and the output power corresponding to the calibration frequency band; when the working frequency band of the DSP module is inconsistent with the calibration frequency band of the DSP module, the output power corresponding to the working frequency band of the DSP module is The output power corresponding to the calibrated frequency band of the DSP module calculates a corresponding gain compensation value; the gain compensation value is used to perform gain compensation on the DSP module.
  • the gain compensation data includes: the calibration frequency and the output power corresponding to the calibration frequency, multiple preset frequencies of the DSP module and their corresponding output powers, and the acquisition of the work of the DSP module
  • the output power corresponding to the frequency band and the output power corresponding to the calibrated frequency band include:
  • the determining the target preset frequency from the multiple preset frequencies according to the current operating frequency of the DSP module includes: detecting the current operating frequency of the DSP module, and comparing the multiple preset frequencies Set the preset frequency closest to the current operating frequency among the frequencies as the target preset frequency.
  • the method before the obtaining the pre-saved gain compensation data corresponding to the working frequency band of the DSP module, the method further includes: controlling the DSP module to connect to the signal generator and the spectrum analyzer through a pass-through module, And obtain full-band gain compensation data, and the frequency band corresponding to the full-band gain compensation data covers the working frequency band of the DSP module.
  • the obtaining full-band gain compensation data includes: reading the received signal information recorded by the spectrum analyzer to obtain downlink full-band compensation data; and detecting the input signal information sent by the signal generator to obtain uplink Full band compensation data.
  • the reading the received signal information recorded by the spectrum analyzer to obtain downlink full-band compensation data includes: sampling multiple frequency points from the frequency band corresponding to the downlink full-band compensation data; The single tone signals corresponding to the multiple frequency points are sent to the spectrum analyzer, and the downlink compensation data corresponding to each frequency point is read from the spectrum analyzer and saved; the downlink compensation data corresponding to each frequency point is used as the downlink Full band compensation data.
  • the detecting the input signal information sent by the signal generator to obtain the uplink full-band compensation data includes:
  • Sample multiple frequency points from the frequency band corresponding to the uplink full-band compensation data control the signal generator to sequentially send the tone signals corresponding to the multiple frequency points to the DSP module, and input the corresponding frequency points by detecting To obtain the uplink compensation data corresponding to each frequency point and save it; use the uplink compensation data corresponding to each frequency point as the uplink full-band compensation data.
  • the DSP module includes multiple transceiving channels, and the method further includes: acquiring downlink full-band compensation data and uplink full-band compensation data corresponding to each transceiving channel.
  • the method further includes: drawing a frequency gain curve according to the full-band gain compensation data, the frequency gain curve including a plurality of data pairs, each The data pair includes: a single preset frequency and its corresponding output power, and the frequency gain curve also includes: a calibrated frequency and its corresponding output power.
  • the compensating the gain of the radio frequency transceiver according to the gain compensation data includes: obtaining the gain of the DSP module at the working frequency band of the DSP module according to the frequency gain curve Compensation value; using the gain difference value to perform gain compensation on the DSP module.
  • FIG. 1 is a schematic structural diagram of a radio frequency transceiver according to an embodiment of the present application
  • Fig. 2 is a flowchart of a gain compensation method according to an embodiment of the present application
  • FIG. 3 is a step of an embodiment of the present application: a flow chart of using gain compensation data corresponding to the working frequency band to compensate the gain of the DSP module;
  • FIG. 4 is a flowchart of the steps of the embodiment of the present application: obtaining the output power corresponding to the working frequency band of the DSP module and the output power corresponding to the calibrated frequency band.
  • a plurality of means at least two, such as two, three, etc., unless specifically defined otherwise. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terminology used herein is only for the purpose of describing specific embodiments, and is not intended to limit the application.
  • the embodiment of the present application provides a gain compensation method, which is applied to a radio frequency transceiver 10, and the radio frequency transceiver includes a digital signal processing DSP module 110 and a radio frequency RF module 120 connected to each other.
  • the radio frequency transceiver 10 is at the transmitting end: the digital signal processing DSP (Digital Signal Processing) module 110 converts the information to be transmitted into a baseband signal, and the radio frequency (RF) (Radio Frequency) module 120 converts the baseband signal
  • the digital signal processing DSP (Digital Signal Processing) module 110 converts the information to be transmitted into a baseband signal
  • RF Radio Frequency
  • the radio frequency signal received from the antenna is first converted into a low-frequency baseband by the radio frequency RF module 120, and then converted into a digital signal by the digital signal processing DSP module 110 and decoded.
  • the radio frequency transceiver 10 may include a DSP module 110 and a plurality of RF modules 120.
  • the DSP module 110 is a functional module that converts information to be transmitted into baseband signals based on digital signal processing technology, and can also be used to convert downstream baseband signals into digital signals and decode them.
  • the DSP module 110 is not limited to DSP chips.
  • the DSP module 110 supports the full frequency band, which refers to the frequency range supported by a network system, such as 300MHz-6000MHz, and each RF module 120 supports a certain frequency band in the full frequency band, such as 300MHz-400MHz, 500MHz-700MHz.
  • a network system such as 300MHz-6000MHz
  • each RF module 120 supports a certain frequency band in the full frequency band, such as 300MHz-400MHz, 500MHz-700MHz
  • the above-mentioned frequency band values are for illustration only, and do not limit the frequency bands supported by the DSP module 110 and the RF module 120.
  • the gain compensation method provided in this application includes: step 202 to step 206.
  • Step 201 Obtain the working frequency band of the RF module
  • Step 202 Configure the link of the DSP module to a frequency band corresponding to the working frequency band of the RF module, and obtain the gain compensation data corresponding to the working frequency band of the DSP module stored in the DSP module in advance;
  • Step 203 Perform gain compensation on the DSP module by using the gain compensation data corresponding to the working frequency band of the DSP module.
  • the radio frequency transceiver includes a DSP module and at least one RF module, obtains the working frequency band of the RF module, configures the link of the DSP module to a frequency band corresponding to the working frequency band of the RF module, and then obtains the pre-saved from the DSP module
  • the gain compensation data in the DSP module corresponding to the working frequency band of the DSP module is used to perform gain compensation on the DSP module working in the frequency band.
  • the corresponding DSP module is also configured to support the working frequency of 300MHz-400MHz or 290MHz-500MHz, and the link working frequency band configured by the DSP module must completely cover the RF
  • the working frequency band corresponding to the module is sufficient.
  • the working frequency band of the above DSP module can be customized according to actual needs.
  • the above-mentioned frequency band end value is only for example, and does not limit the working frequency band actually supported by the DSP module.
  • the pre-saved frequency compensation data ⁇ corresponding to 300MHz-400MHz from the DSP module (the actual link gain is lower than the theoretical gain, so ⁇ 0), and use the frequency compensation data ⁇ to apply the frequency compensation data ⁇ to the DSP module when working in the frequency band 300MHz-400MHz
  • the gain is compensated. That is, the actual gain data a and the frequency compensation data ⁇ are superimposed to perform gain compensation for the DSP module working in the frequency band of 300MHz-400MHz. For example, if the actual gain data a includes the actual gain a 0 and the frequency compensation data ⁇ includes the compensation gain ⁇ 0 , the gain of the DSP module after gain compensation is a 0 + ⁇ 0 .
  • the gain compensation data includes: the output power corresponding to the working frequency band of the DSP module, the calibration frequency band, and the output power corresponding to the calibration frequency band.
  • using the gain compensation data corresponding to the working frequency band of the DSP module to perform gain compensation on the DSP module includes:
  • Step 301 When the working frequency band of the DSP module is inconsistent with the calibration frequency band, calculate the corresponding gain compensation value according to the output power corresponding to the working frequency band of the DSP module and the output power corresponding to the calibration frequency band of the DSP module;
  • Step 302 Use the gain compensation value to perform gain compensation on the DSP module.
  • the gain compensation data includes: the output power corresponding to the working frequency band of the DSP module, the calibration frequency band of the DSP module, and the output power corresponding to the calibration frequency band.
  • the gain compensation data is the gain compensation data corresponding to the DSP module working in the frequency band 300MHz-400MHz, then the gain compensation data includes the output power of the DSP module working in the frequency band 300MHz-400MHz, the DSP module calibration frequency band and the corresponding output of the calibration frequency band power.
  • the process of using the gain compensation data corresponding to the working frequency band of the DSP module to compensate the gain of the DSP module is as follows: Analyze the pre-stored gain compensation data in the DSP module, and obtain the output power W corresponding to the working frequency band ⁇ f of the DSP module carried in the gain compensation data and DSP module calibration frequency ⁇ f 0 corresponding to the output power W 0; when the DSP module working frequency band [Delta] f with a DSP module calibration frequency ⁇ f 0 inconsistent the DSP module working frequency band [Delta] f corresponding to the output power W and the DSP module calibration frequency ⁇ f 0 corresponding
  • the output power W 0 calculates the corresponding gain compensation value ⁇ , and uses the gain compensation value ⁇ to perform gain compensation for the DSP module working at the working frequency band ⁇ f.
  • the DSP module working frequency band [Delta] f corresponding to the output power W and the DSP module calibration frequency ⁇ f 0 corresponding to the output power W 0 is calculated corresponding gain compensation calculation value ⁇ as follows: Get DSP module working frequency band [Delta] f corresponding to the output power W and the DSP module calibration frequency ⁇ f 0 W 0 corresponding to the output power, the difference between the actual output power W and the band corresponding to the nominal output power W 0 as the gain compensation value [Delta] f beta] DSP module corresponding to the working frequency band.
  • the gain compensation data includes: DSP module calibration frequency, output power corresponding to the DSP module calibration frequency, and multiple preset frequencies of the DSP module and their corresponding output powers.
  • obtaining the gain compensation data corresponding to the working frequency band of the DSP module pre-stored in the DSP module includes:
  • Step 401 Determine a target preset frequency from multiple preset frequencies according to the current operating frequency of the DSP module;
  • Step 402 Obtain the output power corresponding to the target preset frequency as the output power corresponding to the working frequency band of the DSP module;
  • Step 403 Obtain the output power corresponding to the calibrated frequency as the output power corresponding to the calibrated frequency band.
  • the gain compensation data includes: the DSP module calibration frequency, the output power corresponding to the DSP module calibration frequency, and multiple preset frequencies and their corresponding output powers.
  • gain compensation data comprises: the DSP module nominal frequency f 0 corresponding to the output power W 0, DSP module corresponding to a predetermined frequency f 1 of the output power W 1, DSP module corresponding to a predetermined frequency f 2 is the output power W 2, ising , The output power W n (n ⁇ Z) corresponding to the preset frequency f n of the DSP module.
  • the process of obtaining the output power corresponding to the working frequency band of the DSP module and the output power corresponding to the calibration frequency band is as follows: the DSP module runs in the working frequency band 300MHz-400MHz, and preset frequencies f 1 , f 2 from multiple DSP modules according to the current working frequency of the DSP module ... f n is determined that the target predetermined frequency f i (1 ⁇ i ⁇ n), and acquires the predetermined frequency f i corresponding to the target output power W i; Further, the calibration data includes a gain compensation frequency f 0 corresponding to the output power W 0 .
  • determining the target preset frequency from a plurality of preset frequencies according to the current operating frequency of the DSP module includes: detecting the current operating frequency of the DSP module, and determining the one of the multiple preset frequencies that is closest to the current operating frequency The preset frequency is used as the target preset frequency.
  • the working process of determining the target preset frequency from multiple preset frequencies according to the current working frequency of the DSP module is 300MHz-400MHz, when it is detected that the current working frequency is 310MHz , 310MHz is the closest to the preset frequency f 0 , and f 0 is the calibrated frequency, then f 0 corresponds to the output power W 0 , which means that the DSP module does not need frequency gain compensation when working at 310 MHz.
  • the current operating frequency is 1230 MHz
  • f i is used as the target preset frequency.
  • the method before obtaining the pre-saved gain compensation data corresponding to the working frequency band of the DSP module, the method further includes: controlling the DSP module to connect to the signal generator and the spectrum analyzer through the pass-through module, and obtain the full-band gain compensation data, The frequency band corresponding to the full-band gain compensation data covers the working frequency band.
  • the foregoing embodiment includes the step of acquiring the gain compensation data corresponding to the working frequency band pre-stored in the DSP module.
  • the method includes obtaining the gain compensation data corresponding to the full frequency band of the DSP module working frequency band, controlling the DSP module to connect to the signal generator and the spectrum analyzer through the pass-through module, and simulating the working process of the DSP module in the radio frequency transceiver , And obtain the full frequency band gain compensation data.
  • the working frequency band corresponding to the DSP module is 300MHz-400MHz, and the full frequency band can be 200-2000MHz, or 300-5000MHz.
  • the above frequency band is only used for illustration, and the full frequency band is not limited.
  • the pre-stored full-band gain compensation data in the DSP module includes the gain compensation corresponding to multiple different working frequency bands. data.
  • obtaining full-band gain compensation data includes: obtaining downlink full-band compensation data by reading the received signal information recorded by the spectrum analyzer; obtaining uplink full-band compensation data by detecting the input signal information sent by the signal generator.
  • obtaining full-band gain compensation data includes obtaining uplink full-band gain compensation data and downlink full-band gain compensation data.
  • the downlink full-band gain compensation data refers to the full-band gain compensation data corresponding to the process of sending a signal to the spectrum analyzer after the radio frequency transmitter is modulated by the DSP module.
  • the uplink full-band gain compensation data refers to the full-band gain compensation data corresponding to the demodulation process of the DSP module when the radio frequency transmitter receives the uplink signal sent by the signal generator through the RF module.
  • acquiring downlink full-band compensation data by reading the received signal information recorded by the spectrum analyzer includes: sampling multiple frequency points from the frequency band corresponding to the downlink full-band compensation data; The single tone signal is sent to the spectrum analyzer, and the downlink compensation data corresponding to each frequency point is read from the spectrum analyzer and saved; the downlink compensation data corresponding to each frequency point is used as the downlink full-band compensation data.
  • the working process of obtaining the downlink full-band compensation data according to the received signal information recorded by the spectrum analyzer is as follows: sample multiple frequency bands from the preset full frequency band, such as the full frequency band including 300MHz-6000MHz, from which one frequency point is sampled every 100MHz , Such as 300MHZ, 400MHz, 500MHz...5900MHz, 6000MHz.
  • the DSP module sends the tone signal corresponding to each frequency point to the spectrum analyzer in turn, and reads the power information of the tone signal corresponding to each frequency point from the spectrum analyzer each time, and obtains the power information of the tone signal corresponding to each frequency point
  • the DSP module saves the frequency gain compensation value corresponding to the downlink data corresponding to each frequency point, and uses it as the downlink full-band compensation data.
  • acquiring uplink full-band compensation data by detecting the input signal information sent by the signal generator includes: sampling multiple frequency points from the frequency band corresponding to the uplink full-band compensation data; controlling the signal generator to send multiple The single tone signal corresponding to the frequency point is sent to the DSP module, and the uplink compensation data corresponding to each frequency point is obtained and saved by detecting the input tone signal corresponding to each frequency point; the uplink compensation data corresponding to each frequency point is used as the uplink full-band compensation data .
  • the process of detecting the uplink data input from the RF module to the DSP module and obtaining the uplink full-band gain compensation data is as follows: sample multiple frequency bands from the preset full frequency band, for example, the full frequency band includes 300MHz-6000MHz, from which every 100MHz Sampling a frequency point, such as 300MHZ, 400MHz, 500MHz...5900MHz, 6000MHz.
  • the signal generator sends the tone signal corresponding to each frequency point in turn to the DSP module.
  • the DSP module detects the input tone signal corresponding to each frequency point and obtains the uplink frequency compensation data corresponding to each frequency point, which is used as the uplink full-band compensation data .
  • the DSP module includes multiple transceiving channels, and the method further includes: obtaining downlink full-band compensation data and uplink full-band compensation data corresponding to each transceiving channel.
  • each transceiver channel obtains downlink full-band gain compensation data and uplink full-band gain compensation data corresponding to each transceiver channel due to different parameters.
  • the identification information corresponding to the transceiver channel is obtained, and the downlink full-band gain compensation data and the uplink full-band gain compensation data corresponding to the identification information are searched for frequency gain compensation.
  • the method further includes: drawing a frequency gain curve based on the full-band gain compensation data, the frequency gain curve includes multiple data pairs, and each data pair includes: a single preset frequency and The corresponding output power and frequency gain curve also include: the calibrated frequency and its corresponding output power.
  • a frequency gain curve is drawn according to the obtained full-band gain compensation data.
  • the frequency gain curve is drawn by multiple data pairs, and the data pairs include multiple preset frequencies and their corresponding output powers.
  • the full frequency band refers to 300MHz-6000MHz, from which a frequency point is sampled every 100MHz, such as 300MHZ, 400MHz, 500MHz...5900MHz, 6000MHz.
  • Each frequency point corresponds to an output power, and each frequency point and its corresponding output power are regarded as a data pair, plus a data pair composed of a calibrated frequency and corresponding output power. Plot the above multiple data pairs into a frequency-frequency gain curve.
  • compensating the gain of the radio frequency transceiver according to the gain compensation data includes: obtaining the gain compensation value of the DSP module at the working frequency band according to the frequency gain curve; and using the gain difference value to perform gain compensation on the DSP module.
  • the working process of compensating the gain of the radio frequency transceiver according to the gain compensation data is as follows: draw a frequency power curve according to the frequency gain compensation data, then obtain the current working frequency, and find the current working frequency from the frequency power curve Preset the frequency point and find the output power corresponding to the preset frequency point, calculate the difference between the output power and the output power corresponding to the calibrated frequency, and use the difference to perform gain compensation for the currently working DSP module.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Transmitters (AREA)

Abstract

La présente invention concerne un procédé de compensation de gain appliqué à un émetteur-récepteur radiofréquence, l'émetteur-récepteur radiofréquence comprenant un module de traitement de signal numérique (DSP) et un module radiofréquence (RF) reliés l'un à l'autre. Le procédé consiste : à acquérir une bande de fréquences de travail d'un module RF ; à configurer une liaison d'un module DSP en tant que bande de fréquence correspondant à la bande de fréquence de travail du module RF, et à acquérir des données de compensation de gain pré-sauvegardées dans le module DSP et correspondant à une bande de fréquence de travail du module DSP ; et à réaliser une compensation de gain sur le module DSP à l'aide des données de compensation de gain correspondant à la bande de fréquence de travail du module DSP. Par la configuration de la liaison du module DSP en tant que bande de fréquence correspondant à la bande de fréquence de travail du module RF, et la réalisation d'une compensation de gain sur le module DSP à l'aide des données de compensation de gain correspondant à la bande de fréquence de travail du module DSP, des erreurs dans la compensation de gain peuvent être efficacement réduites.
PCT/CN2020/106583 2019-08-05 2020-08-03 Procédé de compensation de gain WO2021023155A1 (fr)

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