CN114039619A - Zero intermediate frequency radio frequency front end circuit, system, radio frequency unit protection method and medium - Google Patents
Zero intermediate frequency radio frequency front end circuit, system, radio frequency unit protection method and medium Download PDFInfo
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- CN114039619A CN114039619A CN202111142288.2A CN202111142288A CN114039619A CN 114039619 A CN114039619 A CN 114039619A CN 202111142288 A CN202111142288 A CN 202111142288A CN 114039619 A CN114039619 A CN 114039619A
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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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/30—Circuits for homodyne or synchrodyne receivers
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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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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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 relates to a zero intermediate frequency radio frequency front end circuit, a system, a radio frequency unit protection method and a storage medium, wherein the zero intermediate frequency radio frequency front end circuit comprises a radio frequency unit module and a control module, wherein the radio frequency unit module comprises a cascaded numerical control attenuator and an amplifier; the digital control attenuator is used for attenuating the received first radio frequency signal according to a preset first attenuation amount in a preset initialization stage; in the preset initialization stage, the control module controls the controlled switch unit to be in a switch state which does not enable the amplifier. By this application. The problem that a radio frequency unit module of a zero intermediate frequency radio frequency front-end circuit is easy to damage is solved.
Description
Technical Field
The present application relates to the field of radio frequency circuits, and in particular, to a zero intermediate frequency radio frequency front end circuit, a system, a radio frequency unit protection method, and a medium.
Background
The radio frequency front end is positioned at the frontmost end of the wireless communication receiving system, the structure and the performance of the radio frequency front end directly influence the whole communication system, the structure is optimally designed to improve the performance of the wireless communication receiving system, and the radio frequency front end is an important improvement direction in the wireless communication system.
The common radio frequency front end structure of the wireless communication comprises a superheterodyne structure and a zero intermediate frequency structure, wherein the zero intermediate frequency structure is space-saving, low in cost and low in power consumption compared with the superheterodyne structure, and flexible application of bandwidth and frequency bands can be realized based on flexible software configuration. However, in the zero-if scheme, a local oscillator is leaked, a radio frequency signal emitted by an optical Transceiver is mixed with a high direct current, and under the condition that Quadrature Error Correction (QEC) is not performed, a signal generated by the optical Transceiver (Transceiver) directly enters a radio frequency unit module at the rear end, and a large direct current signal enters the radio frequency unit module, and is amplified by a power amplifier corresponding to the radio frequency unit module, so that the radio frequency unit module is damaged. Aiming at the problem that a radio frequency unit module of a zero intermediate frequency radio frequency front-end circuit is easy to damage in the related technology, no effective solution is provided at present.
Disclosure of Invention
The present embodiment provides a zero-if rf front-end circuit, a system, a method for protecting an rf unit, and a medium, so as to solve the problem that an rf unit module of a zero-if rf front-end circuit is easily damaged in the related art.
In a first aspect, the present embodiment provides a zero intermediate frequency radio frequency front end circuit, including a control module, a radio frequency transceiver and a radio frequency unit module, where the radio frequency unit module includes a cascaded digital controlled attenuator and an amplifier, a transmission port of the radio frequency transceiver is connected to a radio frequency input port, the radio frequency input port is connected to the digital controlled attenuator, the digital controlled attenuator is electrically connected to the control module in a controlled manner, the control module is further connected to the amplifier through a controlled switch unit, the controlled switch unit has a switch state that does not enable the amplifier, the control module is further connected to the radio frequency transceiver, the control module is configured to control the start and stop of the radio frequency transceiver, where the radio frequency transceiver is configured to convert a baseband signal into a first radio frequency signal in a preset initialization stage, and transmitting the data to the numerical control attenuator, wherein the preset initialization stage is an initialization configuration stage of the radio frequency transceiver; the digital control attenuator is used for attenuating the received first radio frequency signal according to a preset first attenuation amount in the preset initialization stage; and in the preset initialization stage, the control module controls the controlled switch unit to be in a switch state which does not enable the amplifier.
In some embodiments, the rf unit module further includes an isolator and a coupler, an input of the isolator is connected to an output of the amplifier, an output of the isolator is connected to an rf output port, an output of the amplifier is further connected to an input of the coupler, outputs of the coupler are respectively connected to a power detection port of the control module and a feedback port of the rf transceiver, the controlled switch unit has a switch state that enables the amplifier, and after the preset initialization stage, the control module controls the controlled switch unit to be in the switch state that enables the amplifier, wherein the amplifier is configured to amplify the first rf signal; the isolator is used for transmitting the amplified first radio-frequency signal to the radio-frequency output port; the coupler is used for collecting the amplified first radio-frequency signal, generating a first feedback signal and a power control signal, and respectively transmitting the first feedback signal and the power control signal to the radio-frequency transceiver and the control module; the radio frequency transceiver is used for carrying out first orthogonal error correction according to the received first feedback signal and converting a baseband signal into a second radio frequency signal based on the corresponding configuration parameter after the first orthogonal error correction before carrying out the next orthogonal error correction; the control module is further configured to complete power detection on the first radio frequency signal according to the received power detection signal; the numerical control attenuator is used for carrying out decrement processing on the first attenuation amount according to a preset step value and attenuating the received second radio frequency signal according to a second attenuation amount obtained by the decrement processing, wherein the lower limit of the second attenuation amount is a preset attenuation amount calibration value.
In some embodiments, the amplifier includes a first amplifier and a second amplifier, the digitally controlled attenuator, the first amplifier, the second amplifier and the isolator are connected in cascade, the coupler is connected to the second amplifier, and the first amplifier and the second amplifier are respectively connected to the control module through the corresponding controlled switch units, wherein, in the preset initialization phase, the control module controls the corresponding controlled switch units to be in a switch state that does not enable the first amplifier and the second amplifier respectively; after the preset initialization stage, the control module controls the corresponding controlled switch unit to be in a switch state enabling the first amplifier and the second amplifier, the isolator outputs the first radio-frequency signal amplified by the second amplifier to the radio-frequency output port, and the coupler collects the first radio-frequency signal amplified by the second amplifier to generate the first feedback signal and the power detection signal.
In some embodiments, the amplifier includes a third amplifier and a fourth amplifier, the digitally controlled attenuator, the third amplifier, the fourth amplifier and the isolator are connected in cascade, the coupler is connected to the third amplifier, and the third amplifier and the fourth amplifier are respectively connected to the control module through the corresponding controlled switch units, wherein, in the preset initialization stage, the control module controls at least the controlled switch unit corresponding to the third amplifier to be in a switch state that does not enable the third amplifier; after the preset initialization stage, the control module controls the corresponding controlled switch unit to be in a switch state enabling the third amplifier and the fourth amplifier, the isolator outputs the first radio-frequency signal amplified by the fourth amplifier to the radio-frequency output port, and the coupler collects the first radio-frequency signal amplified by the third amplifier to generate the first feedback signal and the power detection signal.
In some embodiments, the rf unit module further includes a filter disposed between the rf input port and the digitally controlled attenuator, wherein in the preset initialization phase, the filter filters the first rf signal, and after the preset initialization phase, the filter filters the second rf signal.
In some of these embodiments, the controlled switching unit comprises a radio frequency microwave electronic switch, and/or the isolator comprises a ring coupler.
In some embodiments, the zero intermediate frequency rf front-end circuit further includes an FPGA unit, and the FPGA unit is connected to the control module and the rf transceiver respectively, wherein the FPGA unit is configured to generate a baseband signal and transmit the baseband signal to the rf transceiver; the control module is further configured to control the FPGA unit to generate the baseband signal.
In some embodiments, the zero intermediate frequency rf front-end circuit further includes a first rf switch including a first input port connected to the transmit port of the rf transceiver, a first output port connected to the rf input port, a second output port connected to the feedback port of the rf transceiver, and a first control port, wherein the first rf switch is configured to selectively communicate the first input port with one of the first output port and the second output port; the control module is further configured to control the first radio frequency switch to communicate the first input port with the second output port in the preset initialization stage, and control the first radio frequency switch to communicate the first input port with the first output port after the preset initialization stage; the radio frequency transceiver is further configured to perform quadrature error correction on the radio frequency signal output along the second output port as a feedback signal in the preset initialization stage, and convert the baseband signal into a corresponding radio frequency signal based on the configuration parameter corresponding to the corrected quadrature error after the preset initialization stage and before the next quadrature error correction.
In a second aspect, a zero-if front-end system is provided in this embodiment, and includes a zero-if rf front-end circuit, where the zero-if rf front-end circuit is the zero-if rf front-end circuit of the first aspect.
In a third aspect, in this embodiment, a radio frequency unit protection method is provided, including the zero intermediate frequency radio frequency front-end circuit of the first aspect, the method includes: in the preset initialization stage, the radio frequency transceiver converts a baseband signal into a first radio frequency signal and transmits the first radio frequency signal to the numerical control attenuator, wherein the preset initialization stage is an initialization configuration stage of the radio frequency transceiver; the digital control attenuator attenuates the received first radio frequency signal according to a preset first attenuation amount and transmits the attenuated first radio frequency signal to the amplifier; the control module controls the controlled switch unit not to enable the amplifier, and the first radio-frequency signal after the amplifier is delayed and attenuated is transmitted to the next stage.
In some embodiments, the rf unit module further includes an isolator and a coupler, an input of the isolator is connected to an output of the amplifier, an output of the isolator is connected to an rf output port, an output of the amplifier is further connected to an input of the coupler, and outputs of the coupler are respectively connected to a power detection port of the control module and a feedback port of the rf transceiver, and the method includes: after the preset initialization stage, the control module controls the controlled switch unit to enable the amplifier; the amplifier amplifies the first radio frequency signal; the isolator transmits the amplified first radio-frequency signal to the radio-frequency output port; the coupler collects the amplified first radio frequency signal, generates a first feedback signal and a power control signal, and respectively transmits the first feedback signal and the power control signal to the radio frequency transceiver and the control module; the radio frequency transceiver carries out first orthogonal error correction according to the received first feedback signal, and converts a baseband signal into a second radio frequency signal based on the corresponding configuration parameter after the first orthogonal error correction before carrying out next orthogonal error correction; the control module is also used for completing power detection on the first radio frequency signal according to the received power detection signal; and the numerical control attenuator performs decrement processing on the first attenuation amount according to a preset step value, and attenuates the received second radio-frequency signal according to a second attenuation amount obtained by the decrement processing, wherein the lower limit of the second attenuation amount is a preset attenuation amount calibration value.
In some embodiments, the zero intermediate frequency rf front-end circuit further includes a first rf switch including a first input port, a first output port, a second output port, and a first control port, the first input port being connected to the transmit port of the rf transceiver, the first output port being connected to the rf input port, the second output port being connected to the feedback port of the rf transceiver, the method including: in the preset initialization stage, the control module controls the first radio frequency switch to communicate the first input port with the second output port, and the radio frequency transceiver performs quadrature error correction by using a radio frequency signal output along the second output port as a feedback signal; after the preset initialization stage, the control module controls the first radio frequency switch to communicate the first input port with the first output port, and before next quadrature error correction, the radio frequency transceiver converts the baseband signal into a corresponding radio frequency signal based on the corresponding configuration parameter after the quadrature error correction is completed, and transmits the corresponding radio frequency signal to the radio frequency unit module.
In a fourth aspect, in the present embodiment, a storage medium is provided, on which a computer program is stored, which when executed by a processor, implements the radio unit protection method of the third aspect described above.
Compared with the related art, the zero intermediate frequency rf front-end circuit, the system, the rf unit protection method and the storage medium provided in the present embodiment, the zero intermediate frequency radio frequency front-end circuit comprises a radio frequency unit module, a radio frequency input port, a numerical control attenuator, a control module and a controlled switch unit, wherein the radio frequency unit module comprises a cascaded numerical control attenuator and an amplifier, the transmitting port of a radio frequency transceiver is connected with the radio frequency input port, the radio frequency input port is connected with the numerical control attenuator, the numerical control attenuator is controlled to be electrically connected with the control module, the control module is also connected with the amplifier through the controlled switch unit, the controlled switch unit has a switch state which can not enable the amplifier, the control module is also connected with the radio frequency transceiver, the control module is used for controlling the start-stop work of the radio frequency transceiver, wherein, the RF transceiver is used for converting the baseband signal into a first RF signal at a preset initialization stage, and transmitting the data to a numerical control attenuator, wherein the preset initialization stage is an initialization configuration stage of a radio frequency transceiver; the digital control attenuator is used for attenuating the received first radio frequency signal according to a preset first attenuation amount in a preset initialization stage; in the preset initialization stage, the control module controls the controlled switch unit to be in a switch-off state without enabling the amplifier, so that the problem that a radio frequency unit module of the zero intermediate frequency radio frequency front-end circuit is easy to damage is solved, and the radio frequency unit module is protected from being damaged in the power-on initialization process of a product.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a zero if rf front-end circuit according to an embodiment of the present application.
Fig. 2 is a first schematic diagram of a structure of a zero if rf front-end circuit according to a preferred embodiment of the present application.
Fig. 3 is a schematic diagram of a structure of a zero if rf front-end circuit according to a preferred embodiment of the present application.
Fig. 4 is a schematic diagram of a structure of a zero if rf front-end circuit according to a preferred embodiment of the present application.
Fig. 5 is a schematic structural diagram of a control module, a radio frequency transceiver, a radio frequency unit module and an FPGA unit according to the preferred embodiment of the present application.
Fig. 6 is a schematic diagram of a structure of a zero if rf front-end circuit according to a preferred embodiment of the present application.
Detailed Description
For a clearer understanding of the objects, aspects and advantages of the present application, reference is made to the following description and accompanying drawings.
Unless defined otherwise, technical or scientific terms used herein shall have the same general meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" and "an" and "the" and similar referents in the context of this application do not denote a limitation of quantity, either in the singular or the plural. The terms "comprises," "comprising," "has," "having," and any variations thereof, as referred to in this application, are intended to cover non-exclusive inclusions; for example, a process, method, and system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or modules, but may include other steps or modules (elements) not listed or inherent to such process, method, article, or apparatus. Reference throughout this application to "connected," "coupled," and the like is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference to "a plurality" in this application means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. In general, the character "/" indicates a relationship in which the objects associated before and after are an "or". The terms "first," "second," "third," and the like in this application are used for distinguishing between similar items and not necessarily for describing a particular sequential or chronological order.
The various techniques described herein may be used in various Wireless communication systems, such as 2G, 3G, 4G, 5G communication systems and next generation communication systems, such as Global System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wideband Code Division Multiple Access (OFDMA), Frequency Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), FDMA-System, General Packet Radio Service (GPRS), LTE-5G (Radio System for Long Term Evolution (LTE), abbreviated NR) systems and other such communication systems.
The embodiment provides a zero intermediate frequency radio frequency front end circuit which is applied to a wireless communication receiving system with a zero intermediate frequency structure. Fig. 1 is a schematic structural diagram of a zero if rf front-end circuit according to an embodiment of the present application. As shown in fig. 1, the zero-if rf front-end circuit includes a control module 100, an rf transceiver 200 and an rf unit module 300, the rf unit module 300 at least includes a cascaded digitally controlled attenuator 31 and an amplifier 32, a transmitting port 21 of the rf transceiver 200 is connected to a rf input port 301, the rf input port 301 is connected to the digitally controlled attenuator 31, the digitally controlled attenuator 31 is electrically connected to the control module 100 in a controlled manner, the control module 100 is further connected to the amplifier 32 through a controlled switch unit 400, the control module 100 is further connected to the rf transceiver 200, the control module 100 is configured to control the rf transceiver 200 to start and stop, wherein,
the rf transceiver 200 is configured to convert the baseband signal into a first rf signal and transmit the first rf signal to the digital controlled attenuator 31 in a preset initialization stage, where the preset initialization stage is an initialization configuration stage of the rf transceiver 200.
In this embodiment, in the preset initialization stage, the control module 100 first controls the rf transceiver 200 to start, and because the rf transceiver 200 does not complete quadrature error correction (QEC correction), the first rf signal converted from the baseband signal carries a dc signal with a power much higher than that of the required signal; in the present embodiment, the initialization phase defines a time period from the power-on of the zero if rf front-end circuit to the completion of the configuration of the rf transceiver 200.
And the numerical control attenuator 31 is configured to attenuate the received first radio frequency signal for multiple times according to a preset first attenuation amount in a preset initialization stage.
In this embodiment, since the first rf signal carries a dc signal with a power much higher than that of the desired signal, the dc signal needs to be attenuated, so that the amplifier 32 is not over-amplified and damaged when the first rf signal is transmitted to the subsequent amplifier 32.
The controlled switching cell 400 has a switching state that does not enable the amplifier 32; in the preset initialization phase, the control module 100 controls the controlled switching unit 400 to be in a switching state that does not enable the amplifier 32.
In the present embodiment, the control module 100 turns off or on the amplifier 32 by controlling the controlled switching unit 400; in the present embodiment, the controlled switching unit 400 has switching states including a switching state that enables the amplifier 32 to be turned on, and a switching state that does not enable the amplifier 32 to be turned on, that is, turns off the amplifier 32; in this embodiment, in order to avoid that the rf signal that is not attenuated by the digitally controlled attenuator 31 is transmitted to the amplifier 32 and amplified by the amplifier 32 during the preset initialization phase, and thus damages to the amplifier 32, the control module 100 turns off the amplifier 32 during the initialization phase by controlling the controlled switch unit 400. By turning off the amplifier 32, the signal attenuated by the digital controlled attenuator 31 is not transmitted to the post-stage unit of the amplifier 32 in the initialization stage, so as to prevent the rf transceiver 200 from obtaining a feedback signal from the post-stage unit located at the post-stage of the amplifier 32 and performing corresponding calibration based on the corresponding feedback signal, which may cause calibration error and affect the conversion of the baseband signal into the rf signal, for example: in the corresponding radio frequency signal, the direct current signal is not calibrated to be in a smaller state.
The control module 100 includes one of: singlechip, FPGA, DSP, control module 100 is as the control maincenter of zero intermediate frequency radio frequency front end circuit, controls the work of corresponding module, for example: controls the operation of the rf transceiver 200 and the rf unit module 300. It should be understood that the control module 100 for controlling the operations of the modules is suitable for the present embodiment, for example: the control module 100 may select: CMS89F2235B single-chip microcomputer, SH79F1619AM single-chip microcomputer, STM32F0 series single-chip microcomputer and AT89C51/52 single-chip microcomputer.
It should be noted that, in this embodiment, by turning off the amplifier 32 in the initialization stage of the radio frequency transceiver 200, and setting the numerical control attenuator 31 to have a large attenuation value, that is, to be the first attenuation amount, the radio frequency signal transmitted in the initialization stage after the radio frequency transceiver 200 is powered on is attenuated by the numerical control attenuator 31 by the large attenuation amount, and after the dc component in the corresponding radio frequency signal is sent to the amplifier 32 for amplification, the power of the dc component is far lower than the upper power limit of the amplifier 32, which will not damage the amplifier.
In some embodiments, referring to fig. 1, the rf unit module 300 further includes an isolator 33 and a coupler 34, an input of the isolator 33 is connected to an output of the amplifier 32, an output of the isolator 33 is connected to the rf output port 302, an output of the amplifier 32 is further connected to an input of the coupler 34, outputs of the coupler 34 are respectively connected to the power detection port of the control module 100 and the feedback port 22 of the rf transceiver 200, the controlled switch unit 400 has a switch state enabling the amplifier 32, and after a preset initialization phase, the control module 100 controls the controlled switch unit 400 to be in the switch state enabling the amplifier 32, wherein,
an amplifier 32 for amplifying at least the first radio frequency signal.
In this embodiment, the amplifier 32 first amplifies the radio frequency signal attenuated by the digital control attenuator 31 by the first attenuation amount at the preset initialization stage, and then the amplifier 32 amplifies the radio frequency signal corresponding to the radio frequency signal converted by the radio frequency transceiver 200 after the initialization is completed and after the radio frequency signal passes through the digital control attenuator 31, at this time, the amplification processing performed by the amplifier 32 belongs to the processing of the radio frequency signal by the normal radio frequency unit module 300, and does not belong to the key point of the problem researched and needed to be solved in this embodiment.
And an isolator 33 for transmitting the amplified first rf signal to the rf output port 302.
In the present embodiment, the signal transmitted from the isolator 33 to the rf output port 302 is not limited to the rf signal corresponding to the first rf signal amplified by the amplifier 32; after the initialization is completed, the rf signal generated by the rf transceiver 200 is attenuated and amplified sequentially by the digitally controlled attenuator 31 and the amplifier 32, and then transmitted to the rf output port 302 by the isolator 33 after being attenuated and amplified.
The coupler 34 is configured to collect the amplified first radio frequency signal, generate a first feedback signal and a power control signal, and transmit the first feedback signal and the power control signal to the radio frequency transceiver 200 and the control module 100, respectively.
In this embodiment, the radio frequency signal collected by the coupler 34 is not limited to the radio frequency signal corresponding to the first radio frequency signal amplified by the amplifier 32; in this embodiment, the radio frequency signal acquired by the coupler 34 and corresponding to the first radio frequency signal amplified by the amplifier 32 is a data reference for the radio frequency transceiver 200 to complete the first QEC correction; after the initialization of the rf transceiver 200 is completed, the baseband signal is converted into a normal rf signal, and the rf signal is sequentially attenuated and amplified by the digital control attenuator 31 and the amplifier 32, and then collected by the coupler 34 after being attenuated and amplified, so as to be used as a data reference for the corresponding round of QEC calibration of the rf transceiver 200 and the corresponding round of power detection of the control module 100.
The rf transceiver 200 is configured to perform a first quadrature error correction according to the received first feedback signal, and convert the baseband signal into a second rf signal based on a configuration parameter corresponding to the first quadrature error correction before performing a next quadrature error correction.
In the present embodiment, the data reference used for performing the first quadrature error correction is the first rf signal collected by the coupler 34 and amplified by the amplifier 32. After the first quadrature error correction is completed, the radio frequency transceiver 200 has completed the initialization configuration, and then, the radio frequency transceiver 200 generates and transmits the radio frequency signal to the radio frequency input port 301, and the direct current signal is subjected to QEC correction, so that the power is low, and the amplifier 32 is not affected; meanwhile, after the first QEC correction is completed, the radio frequency transceiver 200 also performs the QEC correction every other period of time, so as to ensure that the power corresponding to the dc component in the radio frequency signal is always kept in a small state, thereby ensuring that the dc component is not suddenly deteriorated to cause damage to the amplifier 32 and the radio frequency unit module 300.
The control module 100 is further configured to complete power detection on the first radio frequency signal according to the received power detection signal.
And the numerical control attenuator 31 is configured to perform decrement processing on the first attenuation amount according to a preset step value, and attenuate the received second radio frequency signal according to a second attenuation amount obtained through the decrement processing, where a lower limit of the second attenuation amount is a preset attenuation amount calibration value.
In this embodiment, after the coupler 34 collects the amplified first rf signal and generates the corresponding first feedback signal, the rf transceiver 200 completes the first QEC correction based on the first feedback signal, after the rf transceiver 200 completes the first QEC correction, the dc signal in the second rf signal generated by the rf transceiver 200 is corrected to a smaller state, at this time, the second rf signal is transmitted to the rf unit module 300 without damaging the rf unit module 300, at this time, the first attenuation amount of the maximum value set by the numerical control attenuator 31 may be released, that is, the attenuation value corresponding to the single attenuation of the rf signal by the numerical control attenuator 31 is reduced, or is gradually reduced according to the preset steps, or the first attenuation amount is directly reduced to the preset attenuation amount calibration value, the numerical control attenuator 31 attenuates the rf signal transmitted by the rf transceiver 200 according to the reduced second attenuation amount, the attenuated rf signal is amplified by the amplifier 32, so that the power of the output rf signal is a predetermined power.
It should be noted that the focus of the research in this application is: the zero intermediate frequency rf front-end circuit processes the rf signal in the initialization stage and a period of time after the initialization stage, thereby protecting the rf unit module 300, and after the initialization stage, and after the rf transceiver 200 completes the corresponding configuration and QEC correction, the rf signal generated and transmitted by the rf transceiver 200 will not affect the rf unit module 300, and at this time, the processing of the zero intermediate frequency rf front-end circuit will be understood by those skilled in the art, for example, the related processing methods in the prior art may be used for processing: the radio frequency transceiver 200 transmits a radio frequency signal, the numerical control attenuator 31 of the radio frequency unit module 300 attenuates the radio frequency signal, the amplifier 32 amplifies the radio frequency signal and outputs the radio frequency signal with preset power, the isolator 33 transmits the radio frequency signal with preset power to the radio frequency output port 302 for outputting, and the coupler 34 collects the radio frequency signal with preset power and feeds the radio frequency signal back to the radio frequency transceiver 200 and the control module 100, so that the toronto QEC correction and the power detection of the radio frequency signal are completed.
Fig. 2 is a schematic structural diagram of a zero intermediate frequency rf front-end circuit according to a preferred embodiment of the present application, referring to fig. 2, in some embodiments, an amplifier 32 includes a first amplifier 321 and a second amplifier 322, a digitally controlled attenuator 31, the first amplifier 321, the second amplifier 322 and an isolator 33 are connected in cascade, a coupler 34 is connected to the second amplifier 322, the first amplifier 321 and the second amplifier 322 are respectively connected to a control module 100 through corresponding controlled switch units 400, wherein,
in the preset initialization stage, the control module 100 controls the corresponding controlled switching units 400 to be in the switching states that do not enable the first amplifier 321 and the second amplifier 322, respectively.
In this embodiment, in the initialization stage, the first amplifier 321 and the second amplifier 322 are controlled to be in the off state, so as to avoid that the signal carrying a large dc component, which is not attenuated by the digitally controlled attenuator 31, is transmitted to the first amplifier 321 and the second amplifier 322 to be power-amplified, which causes damage to the first amplifier 321 and/or the second amplifier 322; meanwhile, by turning off the first amplifier 321 and the second amplifier 322, the signal attenuated by the digital controlled attenuator 31 is not transmitted to the coupler 34 at the subsequent stage of the first amplifier 321 and the second amplifier 322 in the initialization stage, so as to prevent the rf transceiver 200 from acquiring the feedback signal through the coupler 34 and performing corresponding calibration based on the corresponding feedback signal, which causes calibration error and affects the conversion of the baseband signal into the rf signal, for example: in the corresponding radio frequency signal, the direct current signal is not calibrated to be in a smaller state.
After the initialization stage, the control module 100 controls the corresponding controlled switch unit 400 to be in the switch state enabling the first amplifier 321 and the second amplifier 322, the isolator 33 outputs the first radio frequency signal amplified by the second amplifier 322 to the radio frequency output port, and the coupler 33 collects the first radio frequency signal amplified by the second amplifier 322 to generate the first feedback signal and the power detection signal.
In this embodiment, the rf signal reference for the first QEC correction performed by the rf transceiver 200 is collected by the coupler 33 from the output end of the second amplifier 322, the coupler 33 generates a first feedback signal based on the collected rf signal, and after the first feedback signal is fed back to the rf transceiver 200, the rf transceiver 200 performs the corresponding QEC correction, so as to calibrate the dc signal in the subsequently generated rf signal to a smaller state.
Fig. 3 is a schematic structural diagram of a zero intermediate frequency rf front-end circuit according to a preferred embodiment of the present application, referring to fig. 3, in some embodiments, the amplifier 32 includes a third amplifier 323 and a fourth amplifier 324, the digitally controlled attenuator 31, the third amplifier 323, the fourth amplifier 324 and the isolator 33 are connected in cascade, the coupler 34 is connected to the third amplifier 323, the third amplifier 323 and the fourth amplifier 324 are respectively connected to the control module 100 through corresponding controlled switch units 400, wherein,
in the preset initialization stage, the control module 100 controls at least the controlled switching unit 400 corresponding to the third amplifier 323 to be in a switching state that does not enable the third amplifier 323.
In this embodiment, in the initialization stage, the third amplifier 323 is controlled to be in the off state, and the radio frequency signal carrying a large dc component that is not attenuated by the digitally controlled attenuator 31 or the radio frequency signal attenuated by the digitally controlled attenuator 31 is delayed from the third amplifier 323 and is not transmitted to the next stage, so that the first amplifier 321 and/or the second amplifier 322 are not damaged by overdischarge.
After the initialization stage, the control module 100 controls the corresponding controlled switch unit 400 to be in the switch state enabling the third amplifier 323 and the fourth amplifier 324, the isolator 33 outputs the first radio frequency signal amplified by the fourth amplifier 324 to the radio frequency output port, and the coupler 34 collects the first radio frequency signal amplified by the third amplifier 323 to generate the first feedback signal and the power detection signal.
In this embodiment, the rf signal reference for the first QEC correction performed by the rf transceiver 200 is collected by the coupler 33 from the output terminal of the third amplifier 323, the coupler 33 generates a first feedback signal based on the collected rf signal, and after the first feedback signal is fed back to the rf transceiver 200, the rf transceiver 200 performs the corresponding QEC correction, so as to calibrate the dc signal in the subsequently generated rf signal to a smaller state.
Fig. 4 is a schematic structural diagram of a zero if rf front-end circuit according to a preferred embodiment of the present application, referring to fig. 4, in some embodiments, the rf unit module 300 further includes a filter 35, and the filter 35 is disposed between the rf input port 301 and the digitally controlled attenuator 31, where the filter 35 filters a first rf signal during a preset initialization phase, and the filter 35 filters a second rf signal after the preset initialization phase.
In some of these embodiments, the controlled switching unit 400 includes, but is not limited to, a radio frequency microwave electronic switch, and/or the isolator 34 includes a ring coupler.
Fig. 5 is a schematic structural diagram of a control module, a radio frequency transceiver, a radio frequency unit module and an FPGA unit according to a preferred embodiment of the present application, and referring to fig. 5, in some embodiments, the zero-if radio frequency front-end circuit further includes an FPGA unit 500, the FPGA unit 500 is respectively connected to the control module 100 and the radio frequency transceiver 200, wherein the FPGA unit 500 is configured to generate a baseband signal and transmit the baseband signal to the radio frequency transceiver 200; the control module 100 is further configured to control the FPGA unit 500 to generate a baseband signal.
Fig. 6 is a schematic structural diagram of a zero-if rf front-end circuit according to a preferred embodiment of the present application, referring to fig. 6, in some embodiments, the zero-if rf front-end circuit further includes a first rf switch 600, where the first rf switch 600 includes a first input port, a first output port, a second output port, and a first control port, the first input port is connected to the transmission port 21 of the rf transceiver 200, the first output port is connected to the rf input port 301, the second output port is connected to the feedback port 22 of the rf transceiver 200, where,
a first rf switch 600 for selectively connecting the first input port to one of the first output port and the second output port.
The control module 100 is further configured to control the first rf switch 600 to connect the first input port with the second output port in a preset initialization stage, and control the first rf switch 600 to connect the first input port with the first output port after the preset initialization stage.
The rf transceiver 200 is further configured to perform quadrature error correction on the rf signal output along the second output port as a feedback signal in a preset initialization stage, and convert the baseband signal into a corresponding rf signal based on the configuration parameter after the quadrature error correction is completed before performing the next quadrature error correction in the preset initialization stage.
In this embodiment, the first rf switch 600 is disposed at the front end of the rf unit module 300, and in the initialization stage, the reflection port 21 of the rf transceiver 200 is connected to the feedback port 22 thereof through the first rf switch 600, so that the rf signal is transmitted as a feedback signal, and after the QEC calibration is completed, the rf signal is switched back to the rf unit module 300, that is, to the main rf link.
By such a configuration, before the radio frequency transceiver 200 performs QEC correction, it is avoided that a radio frequency signal carrying a large dc component is transmitted to the amplifier 32 of the radio frequency unit module 300, thereby avoiding damage to the radio frequency unit module 300.
The present embodiment provides a zero-if front-end system, which includes a zero-if rf front-end circuit, wherein the zero-if rf front-end circuit is the zero-if rf front-end circuit in the foregoing embodiments.
The embodiment further provides a radio frequency unit protection method, which includes the zero intermediate frequency radio frequency front-end circuit of the embodiment and implements the following steps:
step 1, in a preset initialization stage, a radio frequency transceiver converts a baseband signal into a first radio frequency signal and transmits the first radio frequency signal to a numerical control attenuator, wherein the preset initialization stage is an initialization configuration stage of the radio frequency transceiver.
And 2, attenuating the received first radio frequency signal by the numerical control attenuator according to a preset first attenuation amount, and transmitting the attenuated first radio frequency signal to the amplifier.
And 3, the control module controls the controlled switch unit not to enable the amplifier, the amplifier does not carry out power amplification on the attenuated first radio-frequency signal, and the attenuated first radio-frequency signal is transmitted to the next stage in a delayed mode.
In some embodiments, the rf unit module further includes an isolator and a coupler, an input end of the isolator is connected to an output end of the amplifier, an output end of the isolator is connected to the rf output port, an output end of the amplifier is further connected to an input end of the coupler, an output end of the coupler is respectively connected to the power detection port of the control module and the feedback port of the rf transceiver, and after the initialization stage is preset, the following steps are further performed:
and step 1, the control module controls the controlled switch unit to enable the amplifier.
And 2, amplifying the first radio frequency signal by the amplifier.
And 3, transmitting the amplified first radio-frequency signal to a radio-frequency output port by the isolator.
And 4, acquiring the amplified first radio frequency signal by the coupler, generating a first feedback signal and a power control signal, and respectively transmitting the first feedback signal and the power control signal to the radio frequency transceiver and the control module.
And step 5, the radio frequency transceiver performs the first orthogonal error correction according to the received first feedback signal, and converts the baseband signal into a second radio frequency signal based on the corresponding configuration parameter after the first orthogonal error correction before performing the next orthogonal error correction.
Step 6, the control module also completes the power detection of the first radio frequency signal according to the received power detection signal;
and 7, carrying out decrement processing on the first attenuation amount by the numerical control attenuator according to a preset step value, and attenuating the received second radio-frequency signal according to a second attenuation amount obtained by the decrement processing, wherein the lower limit of the second attenuation amount is a preset attenuation amount calibration value.
In some embodiments, the zero intermediate frequency rf front-end circuit further includes a first rf switch, where the first rf switch includes a first input port, a first output port, a second output port, and a first control port, the first input port is connected to the transmit port of the rf transceiver, the first output port is connected to the rf input port, and the second output port is connected to the feedback port of the rf transceiver; each unit module of the zero intermediate frequency radio frequency front-end circuit also implements the following processes:
step 1, in a preset initialization stage, a control module controls a first radio frequency switch to communicate a first input port with a second output port, and a radio frequency transceiver takes a radio frequency signal output along the second output port as a feedback signal to perform quadrature error correction.
And 2, after the initialization stage is preset, the control module controls the first radio frequency switch to communicate the first input port with the first output port, and before next orthogonal error correction, the radio frequency transceiver converts the baseband signal into a corresponding radio frequency signal based on the corresponding configuration parameters after the orthogonal error correction is finished and transmits the corresponding radio frequency signal to the radio frequency unit module.
In addition, in combination with the radio frequency unit protection method provided in the foregoing embodiment, a storage medium may also be provided in this embodiment. The storage medium having stored thereon a computer program; the computer program, when executed by a processor, implements any of the radio unit protection methods in the above embodiments.
It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to be limiting. All other embodiments, which can be derived by a person skilled in the art from the examples provided herein without any inventive step, shall fall within the scope of protection of the present application.
It is obvious that the drawings are only examples or embodiments of the present application, and it is obvious to those skilled in the art that the present application can be applied to other similar cases according to the drawings without creative efforts. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
The term "embodiment" is used herein to mean that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present 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. It is to be expressly or implicitly understood by one of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the patent protection. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (13)
1. A zero intermediate frequency radio frequency front end circuit comprises a control module, a radio frequency transceiver and a radio frequency unit module, and is characterized in that the radio frequency unit module comprises a cascaded numerical control attenuator and an amplifier, a transmitting port of the radio frequency transceiver is connected with a radio frequency input port, the radio frequency input port is connected with the numerical control attenuator, the numerical control attenuator is controlled and electrically connected with the control module, the control module is also connected with the amplifier through a controlled switch unit, the controlled switch unit has a switch state which can not enable the amplifier, the control module is also connected with the radio frequency transceiver, the control module is used for controlling the start and stop of the radio frequency transceiver, wherein,
the radio frequency transceiver is used for converting a baseband signal into a first radio frequency signal in a preset initialization stage and transmitting the first radio frequency signal to the numerical control attenuator, wherein the preset initialization stage is an initialization configuration stage of the radio frequency transceiver;
the digital control attenuator is used for attenuating the received first radio frequency signal according to a preset first attenuation amount in the preset initialization stage;
and in the preset initialization stage, the control module controls the controlled switch unit to be in a switch state which does not enable the amplifier.
2. The zero intermediate frequency radio frequency front end circuit according to claim 1, wherein the radio frequency unit module further comprises an isolator and a coupler, an input terminal of the isolator is connected to an output terminal of the amplifier, an output terminal of the isolator is connected to a radio frequency output port, an output terminal of the amplifier is further connected to an input terminal of the coupler, output terminals of the coupler are respectively connected to a power detection port of the control module and a feedback port of the radio frequency transceiver, the controlled switch unit has a switch state enabling the amplifier, and after the preset initialization stage, the control module controls the controlled switch unit to be in the switch state enabling the amplifier, wherein,
the amplifier is used for amplifying the first radio frequency signal;
the isolator is used for transmitting the amplified first radio-frequency signal to the radio-frequency output port;
the coupler is used for collecting the amplified first radio-frequency signal, generating a first feedback signal and a power control signal, and respectively transmitting the first feedback signal and the power control signal to the radio-frequency transceiver and the control module;
the radio frequency transceiver is used for carrying out first orthogonal error correction according to the received first feedback signal and converting a baseband signal into a second radio frequency signal based on the corresponding configuration parameter after the first orthogonal error correction before carrying out the next orthogonal error correction;
the control module is further configured to complete power detection on the first radio frequency signal according to the received power detection signal;
the numerical control attenuator is used for carrying out decrement processing on the first attenuation amount according to a preset step value and attenuating the received second radio frequency signal according to a second attenuation amount obtained by the decrement processing, wherein the lower limit of the second attenuation amount is a preset attenuation amount calibration value.
3. The zero intermediate frequency radio frequency front-end circuit according to claim 2, wherein the amplifier comprises a first amplifier and a second amplifier, the digitally controlled attenuator, the first amplifier, the second amplifier and the isolator are connected in cascade, the coupler is connected with the second amplifier, the first amplifier and the second amplifier are respectively connected with the control module through the corresponding controlled switch units, wherein,
in the preset initialization stage, the control module controls the corresponding controlled switch units to be respectively in a switch state which does not enable the first amplifier and the second amplifier;
after the preset initialization stage, the control module controls the corresponding controlled switch unit to be in a switch state enabling the first amplifier and the second amplifier, the isolator outputs the first radio-frequency signal amplified by the second amplifier to the radio-frequency output port, and the coupler collects the first radio-frequency signal amplified by the second amplifier to generate the first feedback signal and the power detection signal.
4. The zero intermediate frequency radio frequency front-end circuit according to claim 2, wherein the amplifier comprises a third amplifier and a fourth amplifier, the digitally controlled attenuator, the third amplifier, the fourth amplifier and the isolator are connected in cascade, the coupler is connected to the third amplifier, the third amplifier and the fourth amplifier are respectively connected to the control module through the corresponding controlled switch units, wherein,
in the preset initialization stage, the control module at least controls the controlled switch unit corresponding to the third amplifier to be in a switch state which does not enable the third amplifier;
after the preset initialization stage, the control module controls the corresponding controlled switch unit to be in a switch state enabling the third amplifier and the fourth amplifier, the isolator outputs the first radio-frequency signal amplified by the fourth amplifier to the radio-frequency output port, and the coupler collects the first radio-frequency signal amplified by the third amplifier to generate the first feedback signal and the power detection signal.
5. The zero intermediate frequency rf front-end circuit according to claim 2, wherein the rf unit module further comprises a filter disposed between the rf input port and the digitally controlled attenuator, wherein the filter filters the first rf signal during the preset initialization phase, and wherein the filter filters the second rf signal after the preset initialization phase.
6. The zero intermediate frequency radio frequency front end circuit according to claim 2, characterized in that the controlled switching unit comprises a radio frequency microwave electronic switch and/or the isolator comprises a ring coupler.
7. The zero intermediate frequency radio frequency front-end circuit according to claim 1, further comprising an FPGA unit connected to the control module and the radio frequency transceiver, respectively, wherein,
the FPGA unit is used for generating a baseband signal and transmitting the baseband signal to the radio frequency transceiver;
the control module is further configured to control the FPGA unit to generate the baseband signal.
8. The zero intermediate frequency radio frequency front-end circuit according to claim 1, further comprising a first radio frequency switch including a first input port connected to a transmit port of the radio frequency transceiver, a first output port connected to the radio frequency input port, a second output port connected to a feedback port of the radio frequency transceiver, and a first control port, wherein,
the first radio frequency switch is used for selectively communicating the first input port with one of the first output port and the second output port;
the control module is further configured to control the first radio frequency switch to communicate the first input port with the second output port in the preset initialization stage, and control the first radio frequency switch to communicate the first input port with the first output port after the preset initialization stage;
the radio frequency transceiver is further configured to perform quadrature error correction on the radio frequency signal output along the second output port as a feedback signal in the preset initialization stage, and convert the baseband signal into a corresponding radio frequency signal based on the configuration parameter corresponding to the corrected quadrature error after the preset initialization stage and before the next quadrature error correction.
9. A zero-if front-end system comprising a zero-if rf front-end circuit, wherein the zero-if rf front-end circuit is the zero-if rf front-end circuit of any one of claims 1 to 8.
10. A method for protecting a radio frequency unit, using the zero if radio frequency front end circuit of claim 1, the method comprising:
in the preset initialization stage, the radio frequency transceiver converts a baseband signal into a first radio frequency signal and transmits the first radio frequency signal to the numerical control attenuator, wherein the preset initialization stage is an initialization configuration stage of the radio frequency transceiver;
the digital control attenuator attenuates the received first radio frequency signal according to a preset first attenuation amount and transmits the attenuated first radio frequency signal to the amplifier;
the control module controls the controlled switch unit not to enable the amplifier, and the first radio-frequency signal after the amplifier is delayed and attenuated is transmitted to the next stage.
11. The method of claim 10, wherein the rf unit module further comprises an isolator and a coupler, wherein an input of the isolator is connected to an output of the amplifier, an output of the isolator is connected to an rf output port, an output of the amplifier is further connected to an input of the coupler, and outputs of the coupler are connected to the power detection port of the control module and the feedback port of the rf transceiver, respectively, the method comprising: after the pre-set initialization phase has been described,
the control module controls the controlled switch unit to enable the amplifier;
the amplifier amplifies the first radio frequency signal;
the isolator transmits the amplified first radio-frequency signal to the radio-frequency output port;
the coupler collects the amplified first radio frequency signal, generates a first feedback signal and a power control signal, and respectively transmits the first feedback signal and the power control signal to the radio frequency transceiver and the control module;
the radio frequency transceiver carries out first orthogonal error correction according to the received first feedback signal, and converts a baseband signal into a second radio frequency signal based on the corresponding configuration parameter after the first orthogonal error correction before carrying out next orthogonal error correction;
the control module is also used for completing power detection on the first radio frequency signal according to the received power detection signal;
and the numerical control attenuator performs decrement processing on the first attenuation amount according to a preset step value, and attenuates the received second radio-frequency signal according to a second attenuation amount obtained by the decrement processing, wherein the lower limit of the second attenuation amount is a preset attenuation amount calibration value.
12. The method of claim 10, wherein the zero intermediate frequency radio frequency front end circuit further comprises a first radio frequency switch comprising a first input port, a first output port, a second output port, and a first control port, the first input port being connected to a transmit port of the radio frequency transceiver, the first output port being connected to the radio frequency input port, the second output port being connected to a feedback port of the radio frequency transceiver, the method comprising:
in the preset initialization stage, the control module controls the first radio frequency switch to communicate the first input port with the second output port, and the radio frequency transceiver performs quadrature error correction by using a radio frequency signal output along the second output port as a feedback signal;
after the preset initialization stage, the control module controls the first radio frequency switch to communicate the first input port with the first output port, and before next quadrature error correction, the radio frequency transceiver converts the baseband signal into a corresponding radio frequency signal based on the corresponding configuration parameter after the quadrature error correction is completed, and transmits the corresponding radio frequency signal to the radio frequency unit module.
13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the radio unit protection method according to any one of claims 10 to 12.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117240226A (en) * | 2023-09-28 | 2023-12-15 | 扬州万方科技股份有限公司 | High-power amplification system based on closed-loop modulation and digital overshoot prevention method |
Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000278147A (en) * | 1999-03-26 | 2000-10-06 | Denso Corp | Radio communication unit and method for controlling transmission power of the radio communication unit |
| US6496062B1 (en) * | 2001-07-13 | 2002-12-17 | Lucent Technologies Inc. | Predistortion system and method using a pilot signal |
| CN1893473A (en) * | 2005-06-29 | 2007-01-10 | 乐金电子(中国)研究开发中心有限公司 | Click noise remove apparatus and method for mobile communication device |
| US20070049225A1 (en) * | 2005-08-23 | 2007-03-01 | Samsung Electronics Co., Ltd. | Apparatus for protecting receiver circuit in time division duplexing wireless communication system |
| CN101056463A (en) * | 2007-05-31 | 2007-10-17 | 武汉虹信通信技术有限责任公司 | A method for uplink and downlink time division switching management in the TD-SCDMA RF receiving and transmission module |
| CN101079599A (en) * | 2007-06-11 | 2007-11-28 | 浙江三维通信股份有限公司 | An implementation method and device for quickly responding to switch power amplification |
| WO2008020067A1 (en) * | 2006-08-18 | 2008-02-21 | Nokia Siemens Networks Gmbh & Co. Kg | Device for radio transmission |
| CN101588187A (en) * | 2008-05-23 | 2009-11-25 | 鸿富锦精密工业（深圳）有限公司 | Radio-frequency signal transceiver and communication system using same |
| CN101621853A (en) * | 2009-06-29 | 2010-01-06 | 中兴通讯股份有限公司 | Audio enabled device and audio enabled method |
| US20100210231A1 (en) * | 2007-10-19 | 2010-08-19 | Shenzhen Grentech Co., Ltd. | Compensation method of radio frequency module performance and radio frequency module |
| CN102420573A (en) * | 2011-12-02 | 2012-04-18 | 熊猫电子集团有限公司 | Setting method for amplifying cluster communication power and power amplifier |
| CN103095317A (en) * | 2011-10-28 | 2013-05-08 | 美国博通公司 | Rf Transceiver With Calibrated Pre-distortion And Methods For Use Therewith |
| CN103187934A (en) * | 2011-12-30 | 2013-07-03 | 中兴通讯股份有限公司 | Protection method for radio frequency power amplifier and RRU (remote RF (radio frequency) unit) |
| CN104158505A (en) * | 2013-05-14 | 2014-11-19 | 中兴通讯股份有限公司 | Radio frequency power amplification circuit, control method and terminal |
| CN106100675A (en) * | 2016-05-23 | 2016-11-09 | 广东欧珀移动通信有限公司 | A kind of radio frequency front-end device, antenna assembly and mobile terminal |
| US20170093355A1 (en) * | 2011-05-13 | 2017-03-30 | Skyworks Solutions, Inc. | Apparatus and methods for biasing of power amplifiers |
| CN107070466A (en) * | 2015-09-30 | 2017-08-18 | 天工方案公司 | The parallel of Serial Control for improving wireless device and power amplifier module uses |
| CN109155611A (en) * | 2016-06-06 | 2019-01-04 | 华为技术有限公司 | Inhibit the method and device thereof of local oscillator leakage in microwave chip |
| JP6496051B1 (en) * | 2017-12-14 | 2019-04-03 | オ，ハクソ | RF communication method between automatic transfer device and equipment in automatic transfer system |
| CN109802692A (en) * | 2019-02-27 | 2019-05-24 | 中国电子科技集团公司第五十四研究所 | A kind of restructural receiving and transmitting front end of ultra wide band and signal transmit-receive method |
| US20200212862A1 (en) * | 2018-12-27 | 2020-07-02 | Qualcomm Incorporated | Radio frequency front-end protection with tunable coupler |
| CN111478711A (en) * | 2019-01-24 | 2020-07-31 | 海能达通信股份有限公司 | Receiver and communication equipment |
-
2021
- 2021-09-28 CN CN202111142288.2A patent/CN114039619B/en active Active
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000278147A (en) * | 1999-03-26 | 2000-10-06 | Denso Corp | Radio communication unit and method for controlling transmission power of the radio communication unit |
| US6496062B1 (en) * | 2001-07-13 | 2002-12-17 | Lucent Technologies Inc. | Predistortion system and method using a pilot signal |
| CN1893473A (en) * | 2005-06-29 | 2007-01-10 | 乐金电子(中国)研究开发中心有限公司 | Click noise remove apparatus and method for mobile communication device |
| US20070049225A1 (en) * | 2005-08-23 | 2007-03-01 | Samsung Electronics Co., Ltd. | Apparatus for protecting receiver circuit in time division duplexing wireless communication system |
| WO2008020067A1 (en) * | 2006-08-18 | 2008-02-21 | Nokia Siemens Networks Gmbh & Co. Kg | Device for radio transmission |
| CN101056463A (en) * | 2007-05-31 | 2007-10-17 | 武汉虹信通信技术有限责任公司 | A method for uplink and downlink time division switching management in the TD-SCDMA RF receiving and transmission module |
| CN101079599A (en) * | 2007-06-11 | 2007-11-28 | 浙江三维通信股份有限公司 | An implementation method and device for quickly responding to switch power amplification |
| US20100210231A1 (en) * | 2007-10-19 | 2010-08-19 | Shenzhen Grentech Co., Ltd. | Compensation method of radio frequency module performance and radio frequency module |
| CN101588187A (en) * | 2008-05-23 | 2009-11-25 | 鸿富锦精密工业（深圳）有限公司 | Radio-frequency signal transceiver and communication system using same |
| CN101621853A (en) * | 2009-06-29 | 2010-01-06 | 中兴通讯股份有限公司 | Audio enabled device and audio enabled method |
| US20170093355A1 (en) * | 2011-05-13 | 2017-03-30 | Skyworks Solutions, Inc. | Apparatus and methods for biasing of power amplifiers |
| CN103095317A (en) * | 2011-10-28 | 2013-05-08 | 美国博通公司 | Rf Transceiver With Calibrated Pre-distortion And Methods For Use Therewith |
| CN102420573A (en) * | 2011-12-02 | 2012-04-18 | 熊猫电子集团有限公司 | Setting method for amplifying cluster communication power and power amplifier |
| CN103187934A (en) * | 2011-12-30 | 2013-07-03 | 中兴通讯股份有限公司 | Protection method for radio frequency power amplifier and RRU (remote RF (radio frequency) unit) |
| CN104158505A (en) * | 2013-05-14 | 2014-11-19 | 中兴通讯股份有限公司 | Radio frequency power amplification circuit, control method and terminal |
| CN107070466A (en) * | 2015-09-30 | 2017-08-18 | 天工方案公司 | The parallel of Serial Control for improving wireless device and power amplifier module uses |
| CN106100675A (en) * | 2016-05-23 | 2016-11-09 | 广东欧珀移动通信有限公司 | A kind of radio frequency front-end device, antenna assembly and mobile terminal |
| CN109155611A (en) * | 2016-06-06 | 2019-01-04 | 华为技术有限公司 | Inhibit the method and device thereof of local oscillator leakage in microwave chip |
| JP6496051B1 (en) * | 2017-12-14 | 2019-04-03 | オ，ハクソ | RF communication method between automatic transfer device and equipment in automatic transfer system |
| US20200212862A1 (en) * | 2018-12-27 | 2020-07-02 | Qualcomm Incorporated | Radio frequency front-end protection with tunable coupler |
| CN111478711A (en) * | 2019-01-24 | 2020-07-31 | 海能达通信股份有限公司 | Receiver and communication equipment |
| CN109802692A (en) * | 2019-02-27 | 2019-05-24 | 中国电子科技集团公司第五十四研究所 | A kind of restructural receiving and transmitting front end of ultra wide band and signal transmit-receive method |
Non-Patent Citations (2)
| Title |
|---|
| ALI A. NASIR.ETC: "《Timing and Carrier Synchronization With Channel Estimation in Multi-Relay Cooperative Networks》", 《IEEE TRANSACTIONS ON SIGNAL PROCESSING》 * |
| 尧长青等: "基于STM32的GaAs放大器控制系统设计", 《现代计算机(专业版)》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117240226A (en) * | 2023-09-28 | 2023-12-15 | 扬州万方科技股份有限公司 | High-power amplification system based on closed-loop modulation and digital overshoot prevention method |
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| CN114039619B (en) | 2023-05-09 |
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