CN111342847A - Method for adjusting output power - Google Patents
Method for adjusting output power Download PDFInfo
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- CN111342847A CN111342847A CN202010091542.XA CN202010091542A CN111342847A CN 111342847 A CN111342847 A CN 111342847A CN 202010091542 A CN202010091542 A CN 202010091542A CN 111342847 A CN111342847 A CN 111342847A
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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
- H04B1/02—Transmitters
- H04B1/04—Circuits
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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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The application discloses radio frequency circuit, method, wireless communication equipment of adjustment output power, this radio frequency circuit are including the first power amplifier, first time division switch and the first wave filter that connect gradually, first time division switch still connects the SRS switch, first antenna is connected to first wave filter, first SRS antenna, second SRS antenna and third SRS antenna are connected respectively to the SRS switch, and first radio frequency signal passes through first power amplifier enlargies, and the first radio frequency signal of enlargeing passes through first time division switch with first wave filter reaches first antenna, or passes through first time division switch with the SRS switch reachs first SRS antenna, second SRS antenna and third SRS antenna.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a radio frequency circuit, a method for adjusting output power, and a wireless communication device.
Background
With the continuous development of mobile wireless communication technology, 5G mobile technology has matured and is practically applied. Unlike the previous generations of mobile communication technologies, 5G always needs to implement four simultaneous receptions at a single mobile terminal in order to achieve high download rates, thereby increasing the download rates. Four-path receiving needs four independent antennas, performance of the four antennas is inconsistent in mobile terminal devices such as mobile phones, the four antennas need terminal transmitting power to achieve uplink, the four antennas need terminal transmitting signals to become Sounding Reference signals (Sounding Reference Signal SRS) to achieve uplink to a base station, and channel quality detection and estimation, beam management and the like can be conducted. The switching antenna transmitting function of the sounding reference signal SRS is a necessary option of China Mobile communication group in 'Chinese Mobile 5G Scale test technology white paper _ terminal', and the SRS mainly aims to ensure the quality and parameters of 4 channels by measuring 4 antenna uplink signals of a terminal by a base station, and then carry out beam forming of a downlink large-scale multiple input and output (MIMO) antenna array aiming at the 4 channels according to channel reciprocity, so that the downlink 4 x MIMO obtains the best data transmission performance.
Disclosure of Invention
The invention aims to provide a radio frequency circuit which improves the detection precision of channel quality.
The application discloses radio frequency circuit includes: the first power amplifier, the first time division switch and the first filter are connected in sequence, the first time division switch is further connected with an SRS switch, the first filter is connected with a first antenna, the SRS switch is respectively connected with a first SRS antenna, a second SRS antenna and a third SRS antenna, a first radio frequency signal is amplified through the first power amplifier, and the amplified first radio frequency signal reaches the first antenna through the first time division switch and the first filter or reaches the first SRS antenna, the second SRS antenna and the third SRS antenna through the first time division switch and the SRS switch.
In a preferred embodiment, the radio frequency circuit includes a second power amplifier, the second time division switch, and the second filter, the second filter is connected to a second antenna, a second radio frequency signal is amplified by the second power amplifier, the second radio frequency signal has a different frequency band from the first radio frequency signal, and the amplified second radio frequency signal reaches the second antenna through the second time division switch and the second filter, or reaches the first SRS antenna, the second SRS antenna, and the third SRS antenna through the second time division switch and the SRS switch.
In a preferred example, the first radio frequency signal is a radio frequency signal of n773300-4200MHz, and the second radio frequency signal is a radio frequency signal of n 794400-5000 MHz.
In a preferred embodiment, the radio frequency circuit further includes a third power amplifier, an input terminal of the third power amplifier is connected to the first time division switch, and an output terminal of the third power amplifier is connected to the first transceiver.
In a preferred embodiment, the radio frequency circuit further includes a fourth power amplifier, an input end of the fourth power amplifier is connected to the second time division switch, and an output end of the fourth power amplifier is connected to the second transceiver.
In a preferred example, the radio frequency circuit further includes a first SRS transceiver, a second SRS transceiver, and a third SRS transceiver, and the first SRS transceiver, the second SRS transceiver, and the third SRS transceiver are respectively connected to the SRS switch.
The application also discloses a method for adjusting output power, which comprises the following steps:
amplifying the first radio frequency signal by a first power amplifier;
the amplified first radio frequency signal sequentially passes through the first time division switch and the first filter to reach the first antenna;
the amplified first radio frequency signal sequentially passes through the first time division switch and the SRS switch to reach the first SRS antenna, the second SRS antenna and the third SRS antenna.
In a preferred embodiment, the method further comprises the following steps:
amplifying a second radio frequency signal through a second power amplifier, wherein the frequency band of the second radio frequency signal is different from that of the first radio frequency signal;
the amplified second radio frequency signal sequentially passes through a second time division switch and a second filter to reach a second antenna;
the amplified second radio frequency signal sequentially passes through the second time division switch and the SRS switch to reach the first SRS antenna, the second SRS antenna and the third SRS antenna.
The application also discloses wireless communication equipment, and the wireless communication equipment adopts the radio frequency circuit.
Compared with the prior art, the method has the following beneficial effects:
in the application, when the SRS antenna of the mobile terminal transmits signals, the SRS signals are prevented from passing through the transmitting filter by changing the transmitting access of the SRS signals, the transmitting power loss of the SRS signals is reduced, the transmitting power of the SRS antenna is close to the transmitting power of the first antenna or the transmitting power of the second antenna, and the detection precision of the channel quality is improved.
The present specification describes a number of technical features distributed throughout the various technical aspects, and if all possible combinations of technical features (i.e. technical aspects) of the present specification are listed, the description is made excessively long. In order to avoid this problem, the respective technical features disclosed in the above summary of the invention of the present application, the respective technical features disclosed in the following embodiments and examples, and the respective technical features disclosed in the drawings may be freely combined with each other to constitute various new technical solutions (which should be regarded as having been described in the present specification) unless such a combination of the technical features is technically infeasible. For example, in one example, the feature a + B + C is disclosed, in another example, the feature a + B + D + E is disclosed, and the features C and D are equivalent technical means for the same purpose, and technically only one feature is used, but not simultaneously employed, and the feature E can be technically combined with the feature C, then the solution of a + B + C + D should not be considered as being described because the technology is not feasible, and the solution of a + B + C + E should be considered as being described.
Drawings
Fig. 1 is a schematic diagram of an rf circuit according to an embodiment of the invention.
Fig. 2 is a schematic diagram of an improved rf circuit in accordance with an embodiment of the present invention.
Fig. 3 is a schematic diagram of an improved rf circuit in another embodiment of the present invention.
Fig. 4 is a flow chart of a method for adjusting output power according to an embodiment of the invention.
Fig. 5 is a flow chart of a method for adjusting output power according to another embodiment of the present invention.
Detailed Description
In the following description, numerous technical details are set forth in order to provide a better understanding of the present application. However, it will be understood by those skilled in the art that the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In an embodiment of the present application, a radio frequency circuit is disclosed, and a schematic diagram of the radio frequency circuit is shown in fig. 1. The radio frequency circuit includes:
the first power amplifier 101, the first time division switch 103, the first filter 104 and the transmission switch 109 are connected in sequence, the first time division switch 103 is further connected with an SRS switch 110, the transmission switch 109 is connected with a first antenna ANT1, the SRS switch 110 is respectively connected with a first SRS antenna AUX1, a second SRS antenna AUX2 and a third SRS antenna AUX3, a first radio frequency signal n77RFin is amplified by the first power amplifier 101, and the amplified first radio frequency signal reaches the first antenna ANT1 through the first time division switch 103, the first filter 104 and the transmission switch 109, or reaches the first SRS antenna AUX1, the second SRS antenna AUX2 and the third SRS antenna AUX3 through the first time division switch 103 and the SRS switch 110.
The second power amplifier 105, the second time division switch 107, and the second filter 108 are connected in sequence, the second filter 108 is connected to the transmit switch 109, the transmit switch 109 is further connected to a second antenna ANT2, a second radio frequency signal n79 RFin is amplified by the second power amplifier 305, the second radio frequency signal n79 RFin has a different frequency band from the first radio frequency signal n77RFin, and the amplified second radio frequency signal reaches the second antenna ANT2 through the second time division switch 107, the second filter 108, and the transmit switch 109, or reaches the first SRS antenna AUX2, the second SRS antenna AUX1, and the third SRS antenna AUX3 through the second time division switch 107 and the SRS switch 110.
The radio frequency circuit further comprises a third power amplifier 102, wherein an input end of the third power amplifier 102 is connected with the first time division switch 103, and an output end of the third power amplifier 102 is connected with the first transceiver n77 RX. The received signal is input from ANT1 or ANT2, passes through the transmission switch 109, the first filter 104, and the first time division switch 103, reaches the third power amplifier 102, is amplified, and is output.
The radio frequency circuit further comprises a fourth power amplifier 106, wherein an input end of the fourth power amplifier 106 is connected to the second time division switch 107, and an output end of the fourth power amplifier 106 is connected to the second transceiver n79 RX. The received signal is input from ANT1 or ANT2, passes through the transmission switch 109, the second filter 108, and the second time division switch 107, reaches the fourth power amplifier 106, is amplified, and is output.
Due to the loss caused by the extra pass through the SRS switch 110, the SRS signal reaching AUX1/AUX2/AUX3 is about 1dB smaller than the antenna ANT1/ANT2 signal, which may affect the accuracy of channel quality detection.
In an embodiment of the present application, an improved rf circuit is disclosed, and a schematic diagram of the rf circuit is shown with reference to fig. 2. The radio frequency circuit includes: the first power amplifier 201, the first time division switch 203 and the first filter 204 are connected in sequence, the first time division switch 203 is further connected with an SRS switch 210, the first filter 204 is connected with a first antenna ANT, the SRS switch 210 is respectively connected with a first SRS antenna AUX1, a second SRS antenna AUX2 and a third SRS antenna AUX3, a first radio frequency signal n77RFin is amplified by the first power amplifier 201, and the amplified first radio frequency signal reaches the first antenna ANT through the first time division switch 203 and the first filter 204, or reaches the first SRS antenna AUX1, the second SRS antenna AUX2 and the third SRS antenna AUX3 through the first time division switch 203 and the SRS switch 210.
In a preferred embodiment, the rf circuit further includes a third power amplifier 202, an input terminal of the third power amplifier 202 is connected to the first time division switch 203, and an output terminal thereof is connected to the first transceiver n77 RX.
Fig. 2 is a block diagram of a single-frequency n77 radio frequency front end solution, when an SRS antenna of a mobile terminal transmits signals, by changing a transmission path of the SRS signals, the SRS signals are prevented from passing through a transmission filter, and the transmission power loss of the SRS signals is reduced, so that the transmission powers of AUX1/AUX2/AUX3 and ANT1 are close to each other, and the detection accuracy of channel quality is improved. It should be understood by those skilled in the art that fig. 2 may also be used to implement an n79 single-frequency rf front end in other embodiments of the present application, and only the n77rf input needs to be changed to n79 rf input, which has the same working process and principle, and is not described herein again.
In another embodiment of the present application, another improved rf circuit is disclosed, and a schematic diagram of the rf circuit is shown with reference to fig. 3. The radio frequency circuit includes: the first power amplifier 301, the first time division switch 303 and the first filter 304 are connected in sequence, the first time division switch 303 is further connected with an SRS switch 310, the first filter 304 is connected with a first antenna ANT1, the SRS switch 310 is respectively connected with a first SRS antenna AUX1, a second SRS antenna AUX2 and a third SRS antenna AUX3, a first radio frequency signal n77RFin is amplified by the first power amplifier 301, and the amplified first radio frequency signal reaches the first antenna ANT1 through the first time division switch 303 and the first filter 304, or reaches the first SRS antenna AUX1, the second SRS antenna AUX2 and the third SRS antenna AUX3 through the first time division switch 303 and the SRS switch 310. The rf circuit further includes a second power amplifier 305, the second time switch 307, and the second filter 308, the second filter 308 is connected to a second antenna ANT2, a second rf signal n79 RFin is amplified by the second power amplifier 305, the second rf signal n79 RFin has a different frequency band from the first rf signal n77RFin, and the amplified second rf signal reaches the second antenna ANT2 through the second time switch 307 and the second filter 308, or reaches the first SRS antenna AUX2, the second SRS antenna AUX1, and the third SRS antenna AUX3 through the second time switch 307 and the SRS switch 310.
Fig. 3 is a block diagram of a dual-band rf front-end solution of n77 and n79, when an SRS antenna of a mobile terminal transmits signals, by changing a transmission path of the SRS signals, the SRS signals are prevented from passing through a transmission filter, and the transmission power loss of the SRS signals is reduced, so that the transmission powers of AUX1/AUX2/AUX3 and ANT1/ANT2 are close to each other, thereby improving the detection accuracy of channel quality.
In a preferred example, the first radio frequency signal is a radio frequency signal of n773300-4200MHz, and the second radio frequency signal is a radio frequency signal of n 794400-5000 MHz. In another preferred example, the second radio frequency signal is a radio frequency signal of n773300-4200MHz, and the first radio frequency signal is a radio frequency signal of n 794400-5000 MHz.
In a preferred embodiment, the radio frequency circuit further includes a third power amplifier 302, an input terminal of the third power amplifier 302 is connected to the first time division switch 303, and an output terminal thereof is connected to the first transceiver n77 RX.
In a preferred embodiment, the radio frequency circuit further includes a fourth power amplifier 306, an input terminal of the fourth power amplifier 306 is connected to the second time division switch 307, and an output terminal of the fourth power amplifier 306 is connected to the second transceiver n79 RX.
In a preferred example, the radio frequency circuit further includes a first SRS transceiver RX1, a second SRS transceiver RX2 and a third SRS transceiver RX3, and the first SRS transceiver RX1, the second SRS transceiver RX2 and the third SRS transceiver RX3 are respectively connected to the SRS switch 310.
The present application also discloses a method for adjusting output power, and fig. 4 is a flowchart of the method for adjusting output power in this embodiment, where the method includes:
In a preferred embodiment, referring to fig. 5, the method further comprises:
Another embodiment of the present application further discloses a wireless communication device, which employs the above radio frequency circuit, and includes the above first antenna and/or second antenna, and the first SRS antenna, the second SRS antenna, and the third SRS antenna. The wireless communication devices to which embodiments of the present application relate may include electronic devices or network devices, which may be various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices linked to wireless modems having wireless communication capabilities, as well as various forms of user equipment, mobile terminals, terminal devices, and the like.
It is noted that, in the present patent application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element. In the present patent application, if it is mentioned that a certain action is executed according to a certain element, it means that the action is executed according to at least the element, and two cases are included: performing the action based only on the element, and performing the action based on the element and other elements. The expression of a plurality of, a plurality of and the like includes 2, 2 and more than 2, more than 2 and more than 2.
All documents mentioned in this specification are to be considered as being incorporated in their entirety into the disclosure of the present application so as to be subject to modification as necessary. It should be understood that the above description is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of the present disclosure should be included in the scope of protection of one or more embodiments of the present disclosure.
In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Claims (9)
1. A radio frequency circuit, comprising: the first power amplifier, the first time division switch and the first filter are connected in sequence, the first time division switch is further connected with an SRS switch, the first filter is connected with a first antenna, the SRS switch is respectively connected with a first SRS antenna, a second SRS antenna and a third SRS antenna, a first radio frequency signal is amplified through the first power amplifier, and the amplified first radio frequency signal reaches the first antenna through the first time division switch and the first filter or reaches the first SRS antenna, the second SRS antenna and the third SRS antenna through the first time division switch and the SRS switch.
2. The radio frequency circuit according to claim 1, wherein the radio frequency circuit includes a second power amplifier, the second time division switch, and the second filter, the second filter is connected to a second antenna, a second radio frequency signal is amplified by the second power amplifier, the second radio frequency signal is in a different frequency band from the first radio frequency signal, and the amplified second radio frequency signal reaches the second antenna through the second time division switch and the second filter, or reaches the first SRS antenna, the second SRS antenna, and a third SRS antenna through the second time division switch and the SRS switch.
3. The radio frequency circuit of claim 1, wherein the first radio frequency signal is a radio frequency signal of n773300-4200MHz, and the second radio frequency signal is a radio frequency signal of n 794400-5000 MHz.
4. The radio frequency circuit of claim 1, further comprising a third power amplifier having an input coupled to the first time division switch and an output coupled to the first transceiver.
5. The radio frequency circuit of claim 2, further comprising a fourth power amplifier having an input connected to the second time division switch and an output connected to the second transceiver.
6. The radio frequency circuit of claim 1, further comprising a first SRS transceiver, a second SRS transceiver, and a third SRS transceiver, the first SRS transceiver, the second SRS transceiver, and the third SRS transceiver being respectively connected to the SRS switch.
7. A method of adjusting output power, comprising:
amplifying the first radio frequency signal by a first power amplifier;
the amplified first radio frequency signal sequentially passes through the first time division switch and the first filter to reach the first antenna;
the amplified first radio frequency signal sequentially passes through the first time division switch and the SRS switch to reach the first SRS antenna, the second SRS antenna and the third SRS antenna.
8. The method of adjusting output power of claim 7, further comprising:
amplifying a second radio frequency signal through a second power amplifier, wherein the frequency band of the second radio frequency signal is different from that of the first radio frequency signal;
the amplified second radio frequency signal sequentially passes through a second time division switch and a second filter to reach a second antenna;
the amplified second radio frequency signal sequentially passes through the second time division switch and the SRS switch to reach the first SRS antenna, the second SRS antenna and the third SRS antenna.
9. A wireless communication device, characterized in that a radio frequency circuit according to any of claims 1-6 is used.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010091542.XA CN111342847B (en) | 2020-02-13 | 2020-02-13 | Method for adjusting output power |
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| CN202010091542.XA CN111342847B (en) | 2020-02-13 | 2020-02-13 | Method for adjusting output power |
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| CN111342847B (en) | 2021-11-30 |
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