Signal transmitting method and electronic equipment

Abstract

The invention discloses a signal transmitting method and electronic equipment, and relates to the technical field of communication. The signal transmitting method comprises the following steps: receiving a first radio frequency signal through a first antenna and a first downlink to obtain a first radio frequency sub-signal, and receiving the first radio frequency signal through a second antenna and a second downlink to obtain a second radio frequency sub-signal; determining a difference value obtained by subtracting the phase of the second radio frequency sub-signal from the phase of the first radio frequency sub-signal to obtain a first phase difference; determining the sum of the first phase difference and a preset phase difference to obtain a second phase difference; a third radio frequency sub-signal is transmitted through the first uplink and the first antenna, a fourth radio frequency sub-signal is transmitted through the second uplink and the second antenna, and the difference value obtained by subtracting the phase of the third radio frequency sub-signal from the phase of the fourth radio frequency sub-signal is equal to the second phase difference. The signal transmitting method can realize the shaping of the uplink wave beam in satellite communication, so that the uplink wave beam has directivity and points to the satellite, and the enhancement of the uplink radio frequency signal is realized.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a signal transmission method and electronic equipment. Background Art

[0002] Satellite communication is a communication technology that uses artificial satellites as relay stations to send and receive radio frequency signals to enable multiple electronic devices to communicate with each other. With the rapid development of electronic devices such as mobile phones, tablets, and smart watches, satellite communication has gradually become one of the indispensable functions of electronic devices.

[0003] In the related art, when performing satellite communications, the satellite can achieve downlink beamforming through antenna arrays and directional antennas, so that the downlink radio frequency signal covers a specified area and enhances the downlink radio frequency signal. Similarly, if the electronic device can achieve uplink beamforming, the uplink radio frequency signal can also be enhanced. However, in the related art, it is impossible to achieve uplink beamforming in satellite communications. Summary of the invention

[0004] The embodiment of the present application provides a signal transmission method and electronic device, which can realize the shaping of uplink beams in satellite communications, so that the uplink beams are directional and point to the satellite, thereby realizing the enhancement of uplink radio frequency signals. The technical solution is as follows:

[0005] In a first aspect, a signal transmission method is provided. The signal transmission method is applied to an electronic device. The electronic device includes: a baseband, a first uplink, a second uplink, a first downlink, a second downlink, a first antenna, and a second antenna. The first uplink and the first downlink are both connected between the baseband and the first antenna. The second uplink and the second downlink are both connected between the baseband and the second antenna.

[0006] The signal transmission method comprises: the baseband receives the first radio frequency signal through the first antenna and the first downlink to obtain the first radio frequency sub-signal; and the baseband receives the first radio frequency signal through the second antenna and the second downlink to obtain the second radio frequency sub-signal. The first radio frequency signal is a downlink radio frequency signal transmitted by the satellite to the antenna. The baseband determines the difference between the phase of the first radio frequency sub-signal and the phase of the second radio frequency sub-signal to obtain the first phase difference. The first phase difference is related to the distance from the satellite to the first antenna and the distance from the satellite to the second antenna, and is related to the phase change caused by the downlink inside the electronic device. The baseband determines the sum of the first phase difference and the preset phase difference to obtain the second phase difference. The preset phase difference is used to compensate for the difference in the phase change caused by the uplink and the downlink inside the electronic device, so that the second phase difference is related to the distance from the satellite to the first antenna and the distance from the satellite to the second antenna, and is related to the phase change caused by the uplink inside the electronic device. The baseband transmits the third radio frequency sub-signal through the first uplink and the first antenna, and transmits the fourth radio frequency sub-signal through the second uplink and the second antenna. The difference between the phase of the fourth radio frequency sub-signal and the phase of the third radio frequency sub-signal is equal to the second phase difference. In this way, by compensating the phase difference of the fourth RF sub-signal, the third RF sub-signal and the fourth RF sub-signal can reach the satellite at the same time, thereby shaping the uplink beam, making the uplink beam directional and pointing to the satellite, thereby enhancing the uplink RF signal.

[0007] In some embodiments, the first uplink includes a first sublink and a second sublink. The first end of the first sublink is connected to the first end of the baseband. The second end of the first sublink is connected to the first end of the second sublink. The second end of the second sublink is connected to the first antenna. The second uplink includes a third sublink and a fourth sublink. The first end of the third sublink is connected to the second end of the baseband. The second end of the third sublink is connected to the first end of the fourth sublink. The second end of the fourth sublink is connected to the second antenna. The first downlink includes a fifth sublink and a sixth sublink. The first end of the fifth sublink is connected to the third end of the baseband. The second end of the fifth sublink is connected to the first end of the sixth sublink. The second end of the sixth sublink is connected to the first antenna. The second downlink includes a seventh sublink and an eighth sublink. The first end of the seventh sublink is connected to the fourth end of the baseband. The second end of the seventh sublink is connected to the first end of the eighth sublink. The second end of the eighth sublink is connected to the second antenna.

[0008] The signal transmission method is further described below with respect to the structure of the electronic device.

[0009] In some embodiments, the frequency of the first RF signal is the first frequency. That is, the frequency of the first RF sub-signal and the frequency of the second RF sub-signal are both the first frequency. The frequency of the third RF sub-signal and the frequency of the fourth RF sub-signal are both the second frequency.

[0010] Based on this, before the step of "the baseband receives the first RF signal through the first antenna and the first downlink to obtain the first RF sub-signal; and the baseband receives the first RF signal through the second antenna and the second downlink to obtain the second RF sub-signal", the signal transmission method also includes the following steps: the baseband calibrates the first sub-link and the third sub-link so that the first sub-link and the third sub-link produce the same amount of phase change for the RF signal of the second frequency; and the baseband calibrates the fifth sub-link and the seventh sub-link so that the fifth sub-link and the seventh sub-link produce the same amount of phase change for the RF signal of the first frequency.

[0011] Furthermore, before the step of "the baseband receives the first RF signal through the first antenna and the first downlink to obtain the first RF sub-signal; and the baseband receives the first RF signal through the second antenna and the second downlink to obtain the second RF sub-signal", the signal transmission method also includes the following steps: determining a preset phase difference.

[0012] Specifically, the step of "determining the preset phase difference" specifically includes: the baseband receives the third RF signal through the first antenna and the first downlink to obtain the fifth RF sub-signal; and the baseband receives the third RF signal through the second antenna and the second downlink to obtain the sixth RF sub-signal. The third RF signal is a downlink RF signal transmitted by the comprehensive tester to the antenna. The frequency of the third RF signal is the same as the frequency of the first RF signal, both of which are the first frequency. That is to say, the frequency of the fifth RF sub-signal and the frequency of the sixth RF sub-signal are both the first frequency. The baseband determines the difference between the phase of the fifth RF sub-signal and the phase of the sixth RF sub-signal to obtain the third phase difference. The baseband transmits the seventh RF sub-signal to the comprehensive tester through the first uplink and the first antenna, and transmits the eighth RF sub-signal to the comprehensive tester through the second uplink and the second antenna. The frequency of the seventh RF sub-signal and the frequency of the eighth RF sub-signal are both the second frequency, and the difference between the phase of the eighth RF sub-signal and the phase of the seventh RF sub-signal is equal to the third phase difference. The phase of the seventh RF sub-signal received by the comprehensive tester is subtracted from the phase of the eighth RF sub-signal received by the comprehensive tester to obtain the preset phase difference.

[0013] Among them, the third phase difference is: is the phase change amount caused by the distance from the first antenna to the comprehensive tester on the fifth radio frequency sub-signal; is the phase change amount generated by the sixth sub-link and the first antenna on the fifth radio frequency sub-signal; The phase change amount of the sixth radio frequency sub-signal caused by the distance from the comprehensive tester to the second antenna; is the phase change amount generated by the eighth sub-link and the second antenna on the sixth radio frequency sub-signal.

[0014] The preset phase difference is: The phase change amount generated by the second sub-link and the first antenna for the radio frequency sub-signal of the second frequency; It is the phase change amount generated by the fourth sub-link and the second antenna on the radio frequency sub-signal of the second frequency.

[0015] The first phase difference is: in, The phase change amount of the first radio frequency sub-signal caused by the distance from the satellite to the first antenna; is the phase change amount of the second radio frequency sub-signal caused by the distance from the satellite to the second antenna.

[0016] In some embodiments, the first sub-link and the third sub-link both include a driver amplifier, and the second sub-link and the fourth sub-link both include a cascaded filter and a power amplifier. Alternatively, the first sub-link and the third sub-link both do not include a driver amplifier, and the second sub-link and the fourth sub-link both include a cascaded driver amplifier, a filter, and a power amplifier.

[0017] The fifth sublink and the seventh sublink both include a low noise amplifier, and the sixth sublink and the eighth sublink both include a cascaded filter and a low noise amplifier. Alternatively, the fifth sublink and the seventh sublink both do not include a low noise amplifier, and the sixth sublink and the eighth sublink both include a cascaded filter and two low noise amplifiers.

[0018] The signal transmission method provided in the embodiment of the present application is further expanded below.

[0019] In some embodiments, the step of "the baseband receives a first RF signal through a first antenna and a first downlink to obtain a first RF sub-signal; and the baseband receives a first RF signal through a second antenna and a second downlink to obtain a second RF sub-signal" specifically includes: the baseband receives a plurality of first RF signals through the first antenna and the first downlink to obtain a plurality of first RF sub-signals; and the baseband receives a plurality of first RF signals through the second antenna and the second downlink to obtain a plurality of second RF sub-signals, and the plurality of first RF sub-signals and the plurality of second RF sub-signals correspond one to one.

[0020] Based on this, the step of "the baseband determines the difference between the phase of the first RF sub-signal and the phase of the second RF sub-signal to obtain a first phase difference" specifically includes: the baseband determines the difference between the phase of each first RF sub-signal and the phase of the corresponding second RF sub-signal to obtain multiple differences; the baseband takes the average of the multiple differences as the first phase difference.

[0021] Furthermore, the step of "the baseband transmits a third RF sub-signal through the first uplink and the first antenna, and transmits a fourth RF sub-signal through the second uplink and the second antenna" may specifically include: if the baseband receives a preset instruction, the third RF sub-signal is transmitted through the first uplink and the first antenna, and the fourth RF sub-signal is transmitted through the second uplink and the second antenna. The preset instruction is used to indicate that the posture change of the electronic device within a preset time period meets the preset conditions.

[0022] In some embodiments, before the step of "baseband determining the difference between the phase of the first RF sub-signal and the phase of the second RF sub-signal to obtain a first phase difference", the signal transmission method also includes the following steps: determining whether the user is holding the position of the first antenna and the position of the second antenna; if the user is not holding the position of the first antenna and the position of the second antenna, then determining the difference between the phase of the first RF sub-signal and the phase of the second RF sub-signal to obtain the first phase difference.

[0023] In a second aspect, an electronic device is also provided. The electronic device includes a baseband, a first uplink, a second uplink, a first downlink, a second downlink, a first antenna, and a second antenna. The first uplink and the first downlink are both connected between the baseband and the first antenna. The second uplink and the second downlink are both connected between the baseband and the second antenna. The electronic device is used to perform the signal transmission method in any one of the embodiments of the first aspect.

[0024] In some embodiments, the first uplink includes a first sublink and a second sublink. The first end of the first sublink is connected to the first end of the baseband. The second end of the first sublink is connected to the first end of the second sublink. The second end of the second sublink is connected to the first antenna. The second uplink includes a third sublink and a fourth sublink. The first end of the third sublink is connected to the second end of the baseband. The second end of the third sublink is connected to the first end of the fourth sublink. The second end of the fourth sublink is connected to the second antenna. The first downlink includes a fifth sublink and a sixth sublink. The first end of the fifth sublink is connected to the third end of the baseband. The second end of the fifth sublink is connected to the first end of the sixth sublink. The second end of the sixth sublink is connected to the first antenna. The second downlink includes a seventh sublink and an eighth sublink. The first end of the seventh sublink is connected to the fourth end of the baseband. The second end of the seventh sublink is connected to the first end of the eighth sublink. The second end of the eighth sublink is connected to the second antenna.

[0025] In some embodiments, the electronic device further includes: a radio frequency integrated circuit and a radio frequency front-end module. Among them, the first sub-link, the third sub-link, the fifth sub-link, and the seventh sub-link are all integrated in the radio frequency integrated circuit. The second sub-link and the fourth sub-link both include cascaded filters and power amplifiers integrated in the radio frequency front-end module. The sixth sub-link and the eighth sub-link both include cascaded filters and one or two low noise amplifiers integrated in the radio frequency front-end module.

[0026] The technical effect obtained by the above-mentioned second aspect is similar to the technical effect obtained by the corresponding technical means in the above-mentioned first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the architecture of an electronic device provided in an embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the appearance of an electronic device provided in an embodiment of the present application;

[0029] Figure 3 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of a scenario in which a first electronic device receives a downlink radio frequency signal provided by an embodiment of the present application;

[0031] Figure 5 It is a schematic diagram of a scenario in which a first electronic device transmits an uplink radio frequency signal provided in an embodiment of the present application;

[0032] Figure 6 It is a schematic diagram of a scenario in which a second electronic device receives a downlink radio frequency signal provided in an embodiment of the present application;

[0033] Figure 7 It is a schematic diagram of a scenario in which a second electronic device transmits an uplink radio frequency signal provided in an embodiment of the present application;

[0034] Figure 8 is a circuit structure diagram of a first electronic device provided in an embodiment of the present application;

[0035] Fig. 9 is a circuit structure diagram of a second electronic device provided in an embodiment of the present application;

[0036] Fig.10 is a circuit structure diagram of a third electronic device provided in an embodiment of the present application;

[0037] Fig.11 is a circuit structure diagram of a fourth electronic device provided in an embodiment of the present application;

[0038] Fig.12is a circuit structure diagram of a fifth electronic device provided in an embodiment of the present application;

[0039] Fig.13 is a flow chart of a signal transmission method provided in an embodiment of the present application;

[0040] Fig.14 is a circuit structure diagram of a sixth electronic device provided in an embodiment of the present application;

[0041] Fig.15 This is a schematic diagram of a scene of darkroom calibration of an electronic device provided in an embodiment of the present application;

[0042] Fig.16 This is a schematic diagram of a scenario in which an electronic device performs satellite communication provided by an embodiment of the present application;

[0043] Fig.17 is a circuit structure diagram of a seventh electronic device provided in an embodiment of the present application;

[0044] Fig.18 is a circuit structure diagram of an eighth electronic device provided in an embodiment of the present application;

[0045] Fig.19 is a schematic diagram of the position of a hand-grip sensor provided in an embodiment of the present application;

[0046] Fig. 20 This is a schematic diagram of the first type of user's holding position provided in an embodiment of the present application;

[0047] Fig.21 is a schematic diagram of the second type of user's holding position provided in an embodiment of the present application;

[0048] Fig. 22 is a schematic diagram of an image prompt of a user's holding position provided in an embodiment of the present application;

[0049] Fig.23 is a schematic diagram of a first user holding position image provided in an embodiment of the present application;

[0050] Fig.24 is a schematic diagram of a second user holding position image provided in an embodiment of the present application;

[0051] Fig.25 This is a schematic diagram of the third type of user's holding position provided in an embodiment of the present application.

[0052] The meanings of the figures are as follows:

[0053] 10. Electronic device; 12. Radio frequency integrated circuit; 14. Radio frequency front-end module; 101. Screen and cover; 102. Shell; 103. Internal structure; 104. Back cover; 110. First uplink; 112. First sublink; 114. Second sublink; 116. Ninth sublink; 120. Second uplink; 122. Third sublink; 124. Fourth sublink; 126. Tenth sublink; 130. First downlink; 132. Fifth sublink; 134. Sixth sublink; 136. Eleventh sublink; 140. Second downlink; 142. Seventh sublink; 144. Eighth sublink; 146. Twelfth sublink; 152. First coupler; 154. Second coupler; 160. Diversity reception link; 170. Handheld sensor; 20. Satellite; 30. Comprehensive tester. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0055] It should be understood that the "multiple" mentioned in this application refers to two or more. In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of this application, the words "first" and "second" are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not limit them to be different.

[0056] Before explaining the signal transmission method provided in the embodiment of the present application in detail, the application scenario of the signal transmission method is first explained.

[0057] For example, Figure 1 1 is a schematic diagram of the architecture of an electronic device 10 provided in an embodiment of the present application. Figure 1As shown, the electronic device 10 includes an application subsystem, memory, massive storage, baseband (BB), front end module (FEM), radio frequency integrated circuit (RFIC) and antenna (ANT), and these devices can be coupled through various interconnection buses or other electrical connection methods. Among them, TX represents the transmission path, RX represents the receiving path, and different numbers represent different paths. FBRX represents the feedback receiving path, PRX represents the main receiving path, and DRX represents the diversity receiving path. HB represents high frequency, LB represents low frequency, and the two refer to the relative high and low frequencies. It can be understood that Figure 1 The numbers and components are for illustration purposes only and are only used as one possible implementation method. The embodiments of the present application also include other implementation methods.

[0058] The RF integrated circuit may include electronic devices such as a digital to analog converter (DAC), an analog to digital converter (ADC), a filter, a mixer, a driver amplifier (DA), a switch, and a low noise amplifier (LNA). The RF front-end module may include electronic devices such as a filter, a power amplifier (PA), and a switch. Among them, the RF integrated circuit and the RF front-end module may form multiple downlinks and multiple uplinks. The downlink is a RF signal receiving link, which is used to receive the RF signal through the antenna, and process the signal (such as amplification, filtering) and transmit it to the baseband BB. The uplink is a RF signal transmitting link, which is used to receive the RF signal from the baseband BB, and process the signal (such as amplification, filtering) and transmit it to the antenna, so as to radiate the RF signal into space through the antenna.

[0059] The baseband BB can implement signal processing operations such as modulation and demodulation, encoding and decoding, so as to extract useful information or data bits from the RF signal, or convert the information or data bits into the RF signal to be sent. These information or data bits can be data representing user data such as voice, text, video, or control information. For different wireless access technologies, such as 5G new radio (NR) and 5.5G (5G-Advanced), 6G, they often have different processing operations. Therefore, in order to support the integration of multiple mobile communication modes, the baseband BB can include multiple processing cores or multiple hardware accelerators (HAC) at the same time.

[0060] The baseband BB can be an independent chip, which can also be called a modem chip or a baseband processor. In addition, the baseband BB can also be further integrated into a system on chip (SOC), which is manufactured and sold in units of SOC. The software components in the baseband BB can be built into the hardware components of the chip before the chip leaves the factory, or can be imported from other non-volatile memories into the hardware components of the chip after the chip leaves the factory, or these software components can be downloaded and updated online through the network.

[0061] The application subsystem can be used as the main control system or main computing system of the electronic device 10 to run the main operating system and application programs, manage the software and hardware resources of the entire electronic device 10, and provide a user operation interface for the user. The application subsystem may include one or more processing cores. In addition, the application subsystem may also include driver software related to other subsystems (such as the baseband subsystem in the baseband BB). The baseband BB may also include one or more processing cores, as well as HAC and cache, etc.

[0062] The electronic device 10 includes a mobile phone, a tablet computer, a personal computer (PC), a wearable device, etc. Figure 2 is a schematic diagram of the appearance of an electronic device 10 provided in an embodiment of the present application, Figure 3 is a schematic diagram of the structure of an electronic device 10 provided in an embodiment of the present application, and Figure 2 and Figure 3 The electronic device 10 shown is a mobile phone. Figure 3 As shown, the electronic device 10 provided in the embodiment of the present application may include a screen and cover 101, a housing 102, an internal structure 103 and a back cover 104 in sequence from top to bottom along the paper.

[0063] The screen and cover 101 can be used to implement the display function of the electronic device 10. The housing 102 can serve as the main frame of the electronic device 10 to provide rigid support for the electronic device 10. In some embodiments, the housing 102 may include a frame and a middle frame. The internal structure 103 may include a collection of electronic components and mechanical components that implement various functions of the electronic device 10. For example, the internal structure 103 may include a shielding cover, screws, reinforcing ribs, etc. The back cover 104 may be the back appearance surface of the electronic device 10, and the back cover 104 may use glass materials, ceramic materials, plastics, etc. in different implementations.

[0064] Satellite communication is a communication technology that uses artificial satellites as relay stations to send and receive radio frequency signals to enable communication between multiple electronic devices. In the field of communication technology, satellite communication is an important part of 5.5G and 6G. It can not only provide broadband Internet of Things and wide-area Internet of Things services worldwide, but also support new functions such as precision enhanced positioning navigation and real-time earth observation. With the rapid development of electronic devices, satellite communication has gradually become one of the indispensable functions of electronic devices.

[0065] In the related art, when performing satellite communications, the satellite can implement downlink beamforming through antenna arrays and directional antennas, so that the downlink radio frequency signal covers the specified area and enhances the downlink radio frequency signal. Similarly, if the electronic device can implement uplink beamforming, the uplink radio frequency signal can also be enhanced. However, since satellite communications do not have an uplink channel measurement and feedback mechanism, the uplink beamforming in satellite communications cannot be implemented in the related art. In addition, how to support wide- and narrow-band communications, and how to support time division duplexing (TDD) and frequency division duplexing (FDD) have also become difficulties in uplink beamforming. In addition, uplink beamforming must also take into account the Doppler frequency deviation and broadband subcarrier phase difference caused by the large relative speed between the electronic device and the satellite.

[0066] Based on this, the embodiment of the present application provides a signal transmission method, which can realize the shaping of the uplink beam in satellite communication, so that the uplink beam has directionality and points to the satellite, thereby realizing the enhancement of the uplink radio frequency signal. The signal transmission method provided by the embodiment of the present application further has the following purposes: supporting broadband communication and narrowband communication; supporting TDD and FDD; proposing a response strategy when the user blocks the antenna position of the electronic device, thereby enhancing the robustness of satellite communication.

[0067] The following is a general description of the signal transmission method provided in the embodiments of the present application.

[0068] The embodiment of the present application provides a signal transmission method, which can realize the shaping of the uplink beam without the satellite measuring the uplink channel and returning the channel information. The electronic device used by the signal transmission method needs to use multiple input multiple output (MIMO) technology. The principle of the signal transmission method is: when the electronic device receives the downlink RF signal sent by the satellite, the angle of arrival (AOA) of the RF signal is measured, and the same angle is used for uplink transmission, so that the beam of the uplink RF signal is directional and points to the satellite, thereby achieving the effect of enhancing the uplink RF signal.

[0069] Specifically, Figure 4 1 is a schematic diagram of a scenario in which an electronic device 10 receives a downlink radio frequency signal provided by an embodiment of the present application. The electronic device 10 shown in the figure has two antennas for receiving and transmitting radio frequency signals, namely a first antenna ANT1 and a second antenna ANT2. Figure 4 As shown, due to the influence of the posture of the electronic device 10, when the downlink RF signal reaches the electronic device 10, the beam plane and the line between the two antennas have an angle θ (i.e., the arrival angle). The angle θ is determined by the distance difference Δd from the beam plane to the two antennas and the distance between the two antennas. Based on this, Figure 5 As shown, when the electronic device 10 transmits an uplink radio frequency signal, if the beam plane and the line between the two antennas also have an angle θ, the uplink radio frequency signal can be directed toward the satellite 20. To achieve this goal, when the electronic device 10 transmits an uplink radio frequency signal, the distance difference between the beam plane and the two antennas is also Δd.

[0070] Likewise, Figure 6 1 is a schematic diagram of another electronic device 10 receiving a downlink radio frequency signal provided by an embodiment of the present application. The electronic device 10 shown in the figure has three antennas for receiving and transmitting radio frequency signals, namely, a first antenna ANT1, a second antenna ANT2 and a third antenna ANT3. Figure 6 As shown, due to the influence of the posture of the electronic device 10, when the downlink radio frequency signal reaches the electronic device 10, the beam plane and the line connecting the first antenna ANT1 and the second antenna ANT2 have an angle θ (i.e., angle of arrival), and the angle θ is determined by the distance difference Δd1 from the beam plane to the first antenna ANT1 and the second antenna ANT2 and the distance between the first antenna ANT1 and the second antenna ANT2. The beam plane and the line connecting the first antenna ANT1 and the third antenna ANT3 have an angle α (i.e., angle of arrival), and the angle α is determined by the distance difference Δd2 from the beam plane to the first antenna ANT1 and the third antenna ANT3 and the distance between the first antenna ANT1 and the third antenna ANT3. Figure 6In the embodiment shown, since the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3 are located on the same straight line, the angle θ and the angle α form a co-position angle, that is, the angle θ and the angle α are equal. In some other embodiments, the angle θ and the angle α may also be unequal. Figure 6 The situation shown, such as Figure 7 As shown, when the electronic device 10 transmits an uplink radio frequency signal, if the beam plane and the line connecting the first antenna ANT1 and the second antenna ANT2 also have an angle θ, and the beam plane and the line connecting the first antenna ANT1 and the third antenna ANT3 also have an angle α, the uplink radio frequency signal can be directed to the satellite 20. To achieve this purpose, when the electronic device 10 transmits an uplink radio frequency signal, the distance difference between the beam plane and the first antenna ANT1 and the second antenna ANT2 is Δd1, and the distance difference between the beam plane and the first antenna ANT1 and the third antenna ANT3 is Δd2.

[0071] Taking the electronic device 10 having a first antenna ANT1 and a second antenna ANT2 as an example, in an embodiment of the present application, the angle of arrival of the downlink RF signal can be obtained according to the phase of the downlink RF signal received by the first antenna ANT1 and the phase of the downlink RF signal received by the second antenna ANT2. Similarly, the control of the transmission angle of the uplink RF signal can also be achieved by controlling the phase of the uplink RF signal transmitted by the first antenna ANT1 and the phase of the uplink RF signal transmitted by the second antenna ANT2. In an embodiment of the present application, beamforming means: a beam includes multiple RF signals, and by adjusting the phases of the multiple RF signals, the multiple RF signals are constructively interfered in certain directions in space, so that the beam containing multiple RF signals has directionality. The multiple here refers to two or more integers.

[0072] The influence of the Doppler effect on the phase measurement of the downlink RF signal is analyzed below.

[0073] The Doppler effect refers to the change in the wavelength of radiation from an object due to the relative motion between the wave source and the observer. In front of the moving wave source, the wave is compressed, the wavelength becomes shorter, and the frequency becomes higher; behind the moving wave source, the opposite effect occurs, the wavelength becomes longer, and the frequency becomes lower. The higher the relative motion speed between the wave source and the observer, the greater the effect. Broadband communication refers to communication with a larger bandwidth, which can transmit a large amount of data information at the same time. Narrowband communication refers to communication with a smaller bandwidth, which can usually only transmit a small amount of data information. Generally speaking, communications with a bandwidth greater than 1MHz (megahertz) can be considered broadband communications, and communications with a bandwidth less than 1MHz can be considered narrowband communications.

[0074] In the embodiment of the present application, the Doppler effect refers to the change in the wavelength and frequency of the radio frequency signal due to the relative motion between the satellite 20 and the electronic device 10. Since the satellite 20 orbits the earth at a high speed, there is a high-speed relative motion between the satellite 20 and the electronic device 10, which will bring about a serious Doppler effect. For narrowband communication, the Doppler effect can be equivalent to adding a relatively large frequency deviation to the carrier, which will not affect the phase measurement. However, for broadband communication, since broadband communication has multiple subcarriers transmitted simultaneously, and the Doppler effect will have different effects on each subcarrier, it is necessary to analyze the impact of the Doppler effect on the phase measurement of the downlink radio frequency signal in broadband communication.

[0075] In the case of a near-Earth circular orbit, the relative speed between the satellite 20 and the electronic device 10 located on the ground can reach up to the first cosmic speed, i.e., 7.9 km / s (kilometers per second). When the electronic device 10 performs broadband communication, the radio frequency signal received and transmitted by the electronic device 10 may include multiple data packets, each of which includes multiple orthogonal frequency division multiplexing (OFDM) symbols, and each OFDM symbol includes multiple subcarriers.

[0076] For example, each OFDM symbol contains N subcarriers, where N is an integer greater than 0. Here, k is used to represent the kth subcarrier, and X is used to represent the kth subcarrier. k represents the modulation symbol sent by satellite 20 on the kth subcarrier, using f ct Indicates the frequency of the kth subcarrier, using f s represents the frequency interval between subcarriers. For any OFDM symbol, the frequency of the subcarrier with k=0 is the reference frequency of the OFDM symbol. That is, the frequency of the subcarrier with k=0 is f ct , the frequency of the subcarrier with k≠0 is f ct +kf s In this case, the OFDM symbol transmitted by the satellite 20 can be expressed as:

[0077] Among them, y(t) means that the expression is a function of time, e is a natural constant, j is an imaginary unit, and t is time.

[0078] Since the scenario of using satellite communication is generally an outdoor unobstructed scene or an indoor scene where the obstruction (such as a building) has little attenuation on the RF signal, the channel between the satellite 20 and the electronic device 10 can be regarded as an additive white gaussian noise (AWGN) channel, and the relative speed between the near-earth satellite 20 and the electronic device 10 is on the order of 10KM / s, so the OFDM symbol received by the electronic device 10 on the ground can be expressed as:

[0079] Among them, H k is the channel of the kth subcarrier, v is the relative speed between the satellite 20 and the electronic device 10 when the satellite 20 transmits the OFDM symbol, v can be a scalar with positive and negative signs, and the positive and negative signs respectively indicate that the satellite 20 is close to the electronic device 10 and the satellite 20 is far away from the electronic device 10, c is the speed of light, and ω is Gaussian white noise.

[0080] After the OFDM symbol reaches the electronic device 10, the electronic device 10 receives the signal at a frequency f cr The OFDM symbols are down-converted and sampled at baseband to obtain:

[0081] Wherein, y(n) indicates that the expression is a function of the number of samples n, ΔT indicates the time length between the sampling time of the first sampling point of the kth subcarrier and the start time of the kth subcarrier, n indicates the nth sampling point of the kth subcarrier, and T indicates the sampling time interval between two adjacent sampling points of the kth subcarrier. Generally, ΔT<T.

[0082] Let f ct -f cr =Δf c , then:

[0083]

[0084] Assuming that the electronic device 10 has a first antenna ANT1 and a second antenna ANT2, and both the first antenna ANT1 and the second antenna ANT2 are used to receive the OFDM symbol, then under the AWGN channel, the difference in the channels can be regarded as only the difference in the receiving phase. Based on this, the OFDM symbol received by the first antenna ANT1 can be expressed as:

[0085] Where, ΔT RX1 It represents the time length between the sampling time of the first sampling point of the kth subcarrier and the starting time of the kth subcarrier when the first antenna ANT1 receives the OFDM symbol.

[0086] Similarly, the OFDM symbol received by the second antenna ANT2 can be expressed as:

[0087] Where, ΔT RX2 It represents the time length between the sampling time of the first sampling point of the kth subcarrier and the start time of the kth subcarrier when the second antenna ANT2 receives the OFDM symbol.

[0088] The phase difference between each subcarrier in the OFDM symbol received by the first antenna ANT1 and the subcarrier in the OFDM symbol received by the corresponding second antenna ANT2 is calculated, and the phase difference can be obtained as follows:

[0089]

[0090] It can be seen that the calculated phase difference has a coefficient related to the kth subcarrier Where Δf c The frequency deviation is caused by the local oscillator deviation of the satellite 20 and the electronic device 10. This is the frequency deviation caused by the Doppler effect, and the frequency deviation caused by both in satellite communications is of the same magnitude. is the impact of the Doppler effect on each subcarrier. For any data packet, the frequency deviation of the entire OFDM symbol can be estimated through channel estimation and training symbols, that is, However, since it is difficult to estimate the relative speed v between the satellite 20 and the electronic device 10, it is necessary to estimate the relative speed v between the satellite 20 and the electronic device 10. For analysis. Since the relative speed v between the satellite 20 and the electronic device 10 does not exceed 10 km / s, and the speed of light is about 299792.458 km / s, No more than 3.3×10 -5 , which is negligible relative to 1. In other words, Based on this, the phase difference between each subcarrier in the OFDM symbol received by the first antenna ANT1 and the corresponding subcarrier in the OFDM symbol received by the second antenna ANT2 can be calculated. It can be seen that in the embodiment of the present application, the calculation of the phase difference caused by the frequency deviation caused by the Doppler effect can be ignored.

[0091] Since the frequencies of any two subcarriers in an OFDM symbol are different, and the frequencies of the kth subcarriers in different OFDM symbols are the same, in the signal transmission method provided in the embodiment of the present application, it is necessary to calculate the phase difference between each subcarrier in the OFDM symbol received by the first antenna ANT1 and the subcarrier in the same OFDM symbol received by the corresponding second antenna ANT2, and perform separate phase compensation for each subcarrier when transmitting the uplink RF signal. That is to say, in the embodiment of the present application, the technical solution adopted to make the transmission angle of the uplink RF signal equal to the arrival angle of the downlink RF signal is: calculate the phase difference between the phase of the downlink RF signal received by the first antenna ANT1 and the phase of the downlink RF signal received by the second antenna ANT2, and perform phase compensation when transmitting the uplink RF signal. The downlink RF signal and the uplink RF signal here both refer to any subcarrier in an OFDM symbol.

[0092] The electronic device to which the signal transmission method provided in the embodiment of the present application is applied is explained in detail below.

[0093] Figure 8 1 is a circuit structure diagram of an electronic device 10 provided in an embodiment of the present application. For example, the electronic device 10 includes two antennas for receiving and transmitting radio frequency signals. Figure 8 As shown, the electronic device 10 includes a baseband BB, a first uplink 110, a second uplink 120, a first downlink 130, a second downlink 140, a first antenna ANT1 and a second antenna ANT2.

[0094] The first uplink 110 is connected between the first end 1 of the baseband BB and the first antenna ANT1, so that the baseband BB can transmit radio frequency signals through the first uplink 110 and the first antenna ANT1. The second uplink 120 is connected between the second end 2 of the baseband BB and the second antenna ANT2, so that the baseband BB can transmit radio frequency signals through the second uplink 120 and the second antenna ANT2. The first downlink 130 is connected between the third end 3 of the baseband BB and the first antenna ANT1, so that the baseband BB can receive radio frequency signals through the first antenna ANT1 and the first downlink 130. The second downlink 140 is connected between the fourth end 4 of the baseband BB and the second antenna ANT2, so that the baseband BB can receive radio frequency signals through the second antenna ANT2 and the second downlink 140.

[0095] The first uplink 110 and the first downlink 130 can be connected to the first antenna ANT1 through the first antenna switch ANTSW1. The first antenna switch ANTSW1 can be a single-pole double-throw switch, so that at any time, only one of the first uplink 110 and the first downlink 130 is connected to the first antenna ANT1. The second uplink 120 and the second downlink 140 can be connected to the second antenna ANT2 through the second antenna switch ANTSW2. The second antenna switch ANTSW2 can be a single-pole double-throw switch, so that at any time, only one of the second uplink 120 and the second downlink 140 is connected to the second antenna ANT2.

[0096] Specifically, the first uplink 110 may include a first sublink 112 and a second sublink 114. The first end of the first sublink 112 is connected to the first end 1 of the baseband BB. The second end of the first sublink 112 is connected to the first end of the second sublink 114. The second end of the second sublink 114 is connected to the first antenna ANT1 through the first antenna switch ANTSW1. Among them, the first sublink 112 includes a first digital-to-analog converter DAC-TX1, a first filter F1, a second filter F2, a first mixer mixer1, a first driver amplifier DA1 and a first switch SW1. The first digital-to-analog converter DAC-TX1 includes a first in-phase digital-to-analog converter DAC-I1 and a first orthogonal digital-to-analog converter DAC-Q1. The first filter F1 and the second filter F2 may be low pass filters (LPF). The second sublink 114 includes a third filter F3 and a first power amplifier PA1. The third filter F3 may be a band pass filter (BPF).

[0097] The second uplink 120 may include a third sublink 122 and a fourth sublink 124. The first end of the third sublink 122 is connected to the second end 2 of the baseband BB. The second end of the third sublink 122 is connected to the first end of the fourth sublink 124. The second end of the fourth sublink 124 is connected to the second antenna ANT2 through the second antenna switch ANTSW2. Among them, the third sublink 122 includes a second digital-to-analog converter DAC-TX2, a fourth filter F4, a fifth filter F5, a second mixer mixer2, a second driver amplifier DA2 and a second switch SW2. The second digital-to-analog converter DAC-TX2 includes a second in-phase digital-to-analog converter DAC-I2 and a second orthogonal digital-to-analog converter DAC-Q2. The fourth filter F4 and the fifth filter F5 may be LPFs. The second sublink 114 includes a sixth filter F6 and a second power amplifier PA2. The sixth filter F6 may be a BPF.

[0098] The first downlink 130 may include a fifth sublink 132 and a sixth sublink 134. The first end of the fifth sublink 132 is connected to the third end 3 of the baseband BB. The second end of the fifth sublink 132 is connected to the first end of the sixth sublink 134. The second end of the sixth sublink 134 is connected to the first antenna ANT1 through the first antenna switch ANTSW1. Among them, the fifth sublink 132 includes a first analog-to-digital converter ADC-RX1, a seventh filter F7, an eighth filter F8, a third mixer mixer3, a second low noise amplifier LNA2 and a third switch SW3. The first analog-to-digital converter ADC-RX1 includes a first in-phase analog-to-digital converter ADC-I3 and a first orthogonal analog-to-digital converter ADC-Q3. The seventh filter F7 and the eighth filter F8 may be LPFs. The sixth sublink 134 includes a first low noise amplifier LNA1 and a ninth filter F9. The ninth filter F9 may be a BPF.

[0099] The second downlink 140 includes a seventh sublink 142 and an eighth sublink 144. The first end of the seventh sublink 142 is connected to the fourth end 4 of the baseband BB. The second end of the seventh sublink 142 is connected to the first end of the eighth sublink 144. The second end of the eighth sublink 144 is connected to the second antenna ANT2 through the second antenna switch ANTSW2. Among them, the seventh sublink 142 includes a second analog-to-digital converter ADC-RX2, a tenth filter F10, an eleventh filter F11, a fourth mixer mixer4, a fourth low noise amplifier LNA4 and a fourth switch SW4. The second analog-to-digital converter ADC-RX2 includes a second in-phase analog-to-digital converter ADC-I4 and a second orthogonal analog-to-digital converter ADC-Q4. The tenth filter F10 and the eleventh filter F11 can be LPFs. The eighth sublink 144 includes a third low noise amplifier LNA3 and a twelfth filter F12. The twelfth filter F12 can be a BPF.

[0100] Taking the case where the baseband BB transmits a radio frequency signal through the first uplink 110 and the first antenna ANT1 when the electronic device 10 is working as an example, the working process of the electronic device 10 is as follows: the baseband BB is used to output a digital signal. The digital signal is converted into an analog signal by the first digital-to-analog converter DAC-TX1, filtered by the first filter F1 and the second filter F2, and then moved to the carrier frequency by the first mixer mixer1, and then amplified by the first driver amplifier DA1 for the first time, sent to the third filter F3 for bandpass filtering, and then amplified by the first power amplifier PA1 for the second time, and then transmitted to the first antenna ANT1. The first antenna ANT1 completes the radiation of the radio frequency signal.

[0101] Taking the case where the baseband BB receives the radio frequency signal through the first downlink 130 and the first antenna ANT1 when the electronic device 10 is working as an example, the working process of the electronic device 10 is as follows: the first antenna ANT1 receives the radio frequency signal with the carrier frequency and transmits the signal to the ninth filter F9. After the signal is band-pass filtered by the ninth filter F9, it is amplified for the first time by the first low noise amplifier LNA1, and then amplified for the second time by the second low noise amplifier LNA2, and sent to the third mixer mixer3, and moved to the baseband BB frequency by the third mixer mixer3, and then filtered by the seventh filter F7 and the eighth filter F8, and then converted into a digital signal by the first analog-to-digital converter and sent to the baseband BB. The baseband BB is used to process the digital signal.

[0102] In the embodiment of the present application, as described above, in addition to the baseband BB and the antenna, the electronic device 10 may include a radio frequency integrated circuit 12 and a radio frequency front end module 14. The first uplink 110, the second uplink 120, the first downlink 130, and the second downlink 140 may be integrated into the radio frequency integrated circuit 12 and the radio frequency front end module 14. For example, Fig. 9 is a structural diagram of another electronic device 10 provided in an embodiment of the present application, and Fig. 9 Shows Figure 8 The electronic device 10 is integrated as shown. Fig. 9 As shown, the first sub-link 112, the third sub-link 122, the fifth sub-link 132, and the seventh sub-link 142 can be integrated into the RF integrated circuit 12. The second sub-link 114, the fourth sub-link 124, the sixth sub-link 134, and the eighth sub-link 144 can be integrated into the RF front-end module 14.

[0103] It is easy to understand that in the embodiment of the present application, the first sub-link 112, the third sub-link 122, the fifth sub-link 132, and the seventh sub-link 142 are integrated into the RF integrated circuit 12. The second sub-link 114, the fourth sub-link 124, the sixth sub-link 134, and the eighth sub-link 144 are not necessarily fully integrated into the RF front-end module 14. In other words, the first sub-link 112, the second sub-link 114...the seventh sub-link 142, and the eighth sub-link 144 are circuit structures divided for the convenience of the subsequent description of the signal transmission method, rather than being divided according to whether they are integrated in the RF integrated circuit 12 and the RF front-end module 14. In subsequent embodiments, the second sub-link 114, the fourth sub-link 124, the sixth sub-link 134, and the eighth sub-link 144 will also be described as including both electronic devices in the RF integrated circuit 12 and electronic devices in the RF front-end module 14.

[0104] The electronic device 10 provided in the embodiment of the present application is further expanded below with reference to the accompanying drawings.

[0105] When the electronic device 10 performs satellite communication, the radio frequency signals received and sent include L band, S band, C band, X band, etc. Among them, the frequency of the L band is between 1 GHz (gigahertz) and 2 GHz; the frequency of the S band is between 2 GHz and 4 GHz; the frequency of the C band is between 4 GHz and 8 GHz; the frequency of the X band is between 8 GHz and 12 GHz.

[0106] exist Figure 8 and Fig. 9 In the illustrated embodiment, the first uplink 110 and the first antenna ANT1 can be used only to transmit radio frequency signals of one frequency band (any one of the L-band, S-band, C-band, X-band, etc.), or can be used to transmit radio frequency signals of multiple frequency bands. The second uplink 120 and the second antenna ANT2 can also be used only to transmit radio frequency signals of one frequency band, or to transmit radio frequency signals of multiple frequency bands. The first antenna ANT1 and the first downlink 130 can be used only to receive radio frequency signals of one frequency band, or can be used to receive radio frequency signals of multiple frequency bands. The second antenna ANT2 and the second downlink 140 can also be used only to receive radio frequency signals of one frequency band, or can be used to receive radio frequency signals of multiple frequency bands.

[0107] In other embodiments, Fig.10 As shown, the electronic device 10 may further include a ninth sub-link 116, a tenth sub-link 126, an eleventh sub-link 136, a twelfth sub-link 146, a third antenna switch ANTSW3, a third antenna ANT3, a fourth antenna switch ANTSW4 and a fourth antenna ANT4.

[0108] Specifically, a first end of the second sub-link 114 is connected to a second end 2 of the first switch SW1 in the first sub-link 112. A second end of the second sub-link 114 is connected to the first antenna ANT1 through the first antenna switch ANTSW1. A first end of the ninth sub-link 116 is connected to a third end 3 of the first switch SW1 in the first sub-link 112. A second end of the ninth sub-link 116 is connected to the third antenna ANT3 through the third antenna switch ANTSW3. The ninth sub-link 116 includes a thirteenth filter F13 and a third power amplifier PA3. A first end of the fourth sub-link 124 is connected to a second end 2 of the second switch SW2 in the third sub-link 122. A second end of the fourth sub-link 124 is connected to the second antenna ANT2 through the second antenna switch ANTSW2. A first end of the tenth sub-link 126 is connected to a third end 3 of the second switch SW2 in the third sub-link 122. A second end of the tenth sub-link 126 is connected to the fourth antenna ANT4 through the fourth antenna switch ANTSW4. The tenth sub-link 126 includes a fourteenth filter F14 and a fourth power amplifier PA4. The first end of the sixth sub-link 134 is connected to the second end 2 of the third switch SW3 in the fifth sub-link 132. The second end of the sixth sub-link 134 is connected to the first antenna ANT1 through the first antenna switch ANTSW1. The first end of the eleventh sub-link 136 is connected to the third end 3 of the third switch SW3 in the fifth sub-link 132. The second end of the eleventh sub-link 136 is connected to the third antenna ANT3 through the third antenna switch ANTSW3. The eleventh sub-link 136 includes a fifteenth filter F15 and a fifth low noise amplifier LNA5. The first end of the eighth sub-link 144 is connected to the second end 2 of the fourth switch SW4 in the seventh sub-link 142. The second end of the eighth sub-link 144 is connected to the second antenna ANT2 through the second antenna switch ANTSW2. The first end of the twelfth sub-link 146 is connected to the third end 3 of the fourth switch SW4 in the seventh sub-link 142. The second end of the twelfth sub-link 146 is connected to the fourth antenna ANT4 through the fourth antenna switch ANTSW4. The twelfth sub-link 146 includes a sixteenth filter F16 and a sixth low noise amplifier LNA6.

[0109] Among them, each electronic device in the second sub-link 114, the fourth sub-link 124, the sixth sub-link 134, and the eighth sub-link 144 and the first antenna ANT1 and the second antenna ANT2 can operate in the first frequency band (one of the L band, the S band, the C band, and the X band); each electronic device in the ninth sub-link 116, the tenth sub-link 126, the eleventh sub-link 136, and the twelfth sub-link 146 and the third antenna ANT3 and the fourth antenna ANT4 can operate in the second frequency band (another of the L band, the S band, the C band, and the X band). In this case, the baseband BB can transmit the radio frequency signal of the first frequency band through the first sub-link 112, the second sub-link 114, and the first antenna ANT1, and can also transmit the radio frequency signal of the first frequency band through the third sub-link 122, the fourth sub-link 124, and the second antenna ANT2. In addition, the baseband BB can receive the RF signal of the first frequency band through the first antenna ANT1, the sixth sub-link 134, and the fifth sub-link 132, and can also receive the RF signal of the first frequency band through the second antenna ANT2, the eighth sub-link 144, and the seventh sub-link 142. The baseband BB can transmit the RF signal of the second frequency band through the first sub-link 112, the ninth sub-link 116, and the third antenna ANT3, and can also transmit the RF signal of the second frequency band through the third sub-link 122, the tenth sub-link 126, and the fourth antenna ANT4. In addition, the baseband BB can receive the RF signal of the second frequency band through the third antenna ANT3, the eleventh sub-link 136, and the fifth sub-link 132, and can also receive the RF signal of the second frequency band through the fourth antenna ANT4, the twelfth sub-link 146, and the seventh sub-link 142.

[0110] like Fig.10 As shown, in this embodiment, the integration of each sub-link (including the first sub-link 112, the second sub-link 114 ... the twelfth sub-link 146) in the RF integrated circuit 12 and the RF front-end module 14 can be: the first sub-link 112, the third sub-link 122, the fifth sub-link 132, and the seventh sub-link 142 are integrated into the RF integrated circuit 12. The second sub-link 114, the fourth sub-link 124, the sixth sub-link 134, the eighth sub-link 144, the ninth sub-link 116, the tenth sub-link 126, the eleventh sub-link 136, and the twelfth sub-link 146 are integrated into the RF front-end module 14.

[0111] exist Fig.10In the embodiment shown, the sixth sub-link 134 and the eleventh sub-link 136 share the second low noise amplifier LNA2. That is, the second low noise amplifier LNA2 works both in the first frequency band and in the second frequency band. The eighth sub-link 144 and the twelfth sub-link 146 share the fourth low noise amplifier LNA4. That is, the fourth low noise amplifier LNA4 works both in the first frequency band and in the second frequency band. In some other embodiments, such as Fig.11 As shown, the electronic device 10 may further include a seventh low noise amplifier LNA7. In this embodiment, the second low noise amplifier LNA2 only works in the first frequency band, and the seventh low noise amplifier LNA7 only works in the second frequency band. Based on this, the second low noise amplifier LNA2 is connected between the first low noise amplifier LNA1 and the second end 2 of the third switch SW3; the seventh low noise amplifier LNA7 is connected between the fifth low noise amplifier LNA5 and the third end 3 of the third switch SW3. Similarly, the electronic device 10 may further include an eighth low noise amplifier LNA8, the fourth low noise amplifier LNA4 only works in the first frequency band, and the eighth low noise amplifier LNA8 only works in the second frequency band, which will not be described in detail.

[0112] In the embodiment of the present application, the division of the fifth sub-link 132 and the seventh sub-link 142 both starts from the baseband BB and ends at the switch (the third switch SW3 and the fourth switch SW4). Fig.11 As shown, although the second low noise amplifier LNA2 is integrated in the RF integrated circuit 12, it is divided into the sixth sub-link 134 together with the ninth filter F9 and the first low noise amplifier LNA1 in the RF front-end module 14. Similarly, although the seventh low noise amplifier LNA7 is integrated in the RF integrated circuit 12, it is divided into the eleventh sub-link 136 together with the fifteenth filter F15 and the fifth low noise amplifier LNA5 in the RF front-end module 14. Although the fourth low noise amplifier LNA4 is integrated in the RF integrated circuit 12, it is divided into the eighth sub-link 144 together with the twelfth filter F12 and the third low noise amplifier LNA3 in the RF front-end module 14. Although the eighth low noise amplifier LNA8 is integrated in the RF integrated circuit 12, it is divided into the twelfth sub-link 146 together with the sixteenth filter F16 and the sixth low noise amplifier LNA6 in the RF front-end module 14.

[0113] Similarly, in Fig.10In the embodiment shown, the second sub-link 114 and the ninth sub-link 116 share the first driver amplifier DA1. That is, the first driver amplifier DA1 works in both the first frequency band and the second frequency band. The fourth sub-link 124 and the tenth sub-link 126 share the second driver amplifier DA2. That is, the second driver amplifier DA2 works in both the first frequency band and the second frequency band. In other embodiments, such as Fig.12 As shown, the electronic device 10 may further include a third driving amplifier DA3. In this embodiment, the first driving amplifier DA1 only works in the first frequency band, and the third driving amplifier DA3 only works in the second frequency band. Based on this, the first driving amplifier DA1 is connected between the second end 2 of the first switch SW1 and the third filter F3; the third driving amplifier DA3 is connected between the third end 3 of the first switch SW1 and the thirteenth filter F13. Similarly, the electronic device 10 may further include a fourth driving amplifier DA4, the second driving amplifier DA2 only works in the first frequency band, and the fourth driving amplifier DA4 only works in the second frequency band, which will not be repeated.

[0114] In this embodiment, the first driver amplifier DA1 can be divided into the second sub-link 114, the third driver amplifier DA3 can be divided into the ninth sub-link 116, the second driver amplifier DA2 can be divided into the fourth sub-link 124, and the fourth driver amplifier DA4 can be divided into the tenth sub-link 126, which will not be repeated.

[0115] As can be seen from the above description, in the embodiment of the present application, when the first sub-link 112 includes a driver amplifier, the second sub-link 114 may include a cascaded filter and a power amplifier. When the first sub-link 112 does not include a driver amplifier, the second sub-link 114 may include a cascaded driver amplifier, a filter, and a power amplifier. When the third sub-link 122 includes a driver amplifier, the fourth sub-link 124 may include a cascaded filter and a power amplifier. When the third sub-link 122 does not include a driver amplifier, the fourth sub-link 124 may include a cascaded driver amplifier, a filter, and a power amplifier. When the fifth sub-link 132 includes a low noise amplifier, the sixth sub-link 134 may include a cascaded filter and a low noise amplifier. When the fifth sub-link 132 does not include a low noise amplifier, the sixth sub-link 134 may include a cascaded filter and two low noise amplifiers. When the seventh sub-link 142 includes a low noise amplifier, the eighth sub-link 144 may include a cascaded filter and a low noise amplifier. When the seventh sub-link 142 does not include a low noise amplifier, the eighth sub-link 144 may include a cascaded filter and two low noise amplifiers.

[0116] The signal transmission method provided in the embodiment of the present application is explained in detail below.

[0117] The signal transmission method provided in the embodiment of the present application can be applied to the electronic device 10 in any of the above embodiments. Figure 8 The electronic device 10 shown is used as an example for description. Fig.13 is a flow chart of a signal transmission method provided by an embodiment of the present application. Fig.13 As shown, the signal transmission method includes the following steps S110 to S140.

[0118] S110, the baseband BB receives the first RF signal through the first antenna ANT1 and the first downlink 130 to obtain a first RF sub-signal; and the baseband BB receives the first RF signal through the second antenna ANT2 and the second downlink 140 to obtain a second RF sub-signal.

[0119] The first radio frequency signal is a downlink radio frequency signal transmitted by the satellite 20. The first radio frequency signal here may refer to any subcarrier in any OFDM symbol in any data packet transmitted by the satellite 20 to the electronic device 10.

[0120] The electronic device 10 can receive the first RF signal through the first antenna ANT1 and the second antenna ANT2. For ease of description, the signal obtained by the baseband BB receiving the first RF signal through the first antenna ANT1 and the first downlink 130 is called the first RF sub-signal; the signal obtained by the baseband BB receiving the first RF signal through the second antenna ANT2 and the second downlink 140 is called the second RF sub-signal. Here, the first RF signal has a first frequency. That is, the frequency of the first RF sub-signal and the frequency of the second RF sub-signal are both the first frequency.

[0121] S120: The baseband BB determines a difference between a phase of the first radio frequency sub-signal and a phase of the second radio frequency sub-signal to obtain a first phase difference.

[0122] The phase of the first RF sub-signal received by the baseband BB is: in, It is the initial phase of the first RF signal when the satellite 20 transmits the first RF signal. It is the phase change amount of the radio frequency signal (including the first radio frequency sub-signal) caused by the distance from the satellite 20 to the first antenna ANT1. It is the phase change amount generated by the first antenna ANT1 and the first downlink 130 on the first radio frequency sub-signal.

[0123] The phase of the second RF sub-signal received by the baseband BB is: in, It is the phase change amount of the radio frequency signal (including the second radio frequency sub-signal) caused by the distance from the satellite 20 to the second antenna ANT2. It is the phase change amount generated by the second antenna ANT2 and the second downlink 140 for the second radio frequency sub-signal.

[0124] It can be seen that the first phase difference is:

[0125]

[0126] That is to say, the first phase difference is related to the distance from the satellite 20 to the first antenna ANT1 and the distance from the satellite 20 to the second antenna ANT2, and is related to the phase change caused by the internal downlink of the electronic device 10 (i.e., the first antenna ANT1 and the first downlink 130, the second antenna ANT2 and the second downlink 140).

[0127] S130, the baseband BB determines the sum of the first phase difference and the preset phase difference to obtain a second phase difference.

[0128] The preset phase difference can be set by a person skilled in the art to compensate for the difference in phase change caused by the uplink (i.e., the first uplink 110 and the first antenna ANT1, the second uplink 120 and the second antenna ANT2) and the downlink (i.e., the first antenna ANT1 and the first downlink 130, the second antenna ANT2 and the second downlink 140) inside the electronic device 10.

[0129] Specifically, for ease of description, the signal transmitted in the first uplink 110 and the first antenna ANT1 when the electronic device 10 transmits a radio frequency signal to the satellite 20 is referred to as the third radio frequency sub-signal; the signal transmitted in the second uplink 120 and the second antenna ANT2 when the electronic device 10 transmits a radio frequency signal to the satellite 20 is referred to as the fourth radio frequency sub-signal. It is easy to understand that the first uplink 110 and the first antenna ANT1 will affect the phase of the third radio frequency sub-signal; the second uplink 120 and the second antenna ANT2 will affect the phase of the fourth radio frequency sub-signal. Based on this, the preset phase difference can be expressed by the formula:

[0130] in, It is the phase change amount generated by the first uplink 110 and the first antenna ANT1 for the third radio frequency sub-signal. It is the phase change amount generated by the second uplink 120 and the second antenna ANT2 for the fourth radio frequency sub-signal.

[0131] In this case, the second phase difference is:

[0132]

[0133] It can be seen that the obtained second phase difference is related to the distance from the satellite 20 to the first antenna ANT1 and the distance from the satellite 20 to the second antenna ANT2 , and is related to the phase change caused by the internal uplink of the electronic device 10 .

[0134] S140 , the baseband BB transmits a third radio frequency sub-signal through the first uplink 110 and the first antenna ANT1 , and transmits a fourth radio frequency sub-signal through the second uplink 120 and the second antenna ANT2 .

[0135] The third RF sub-signal and the fourth RF sub-signal are both sub-signals of the second RF signal. The second RF signal is an uplink RF signal transmitted by the electronic device 10. The second RF signal may refer to any subcarrier in any OFDM symbol in any data packet transmitted by the electronic device 10 to the satellite 20. Here, the third RF sub-signal refers to the second RF signal transmitted through the first uplink 110 and the first antenna ANT1; the fourth RF sub-signal refers to the second RF signal transmitted through the second uplink 120 and the second antenna ANT2. The second RF signal has a second frequency. That is, the frequency of the third RF sub-signal and the frequency of the fourth RF sub-signal are both the second frequency.

[0136] In step S140, when the baseband BB transmits the fourth RF sub-signal through the second uplink 120 and the second antenna ANT2, the fourth RF sub-signal is also phase compensated so that the difference between the phase of the fourth RF sub-signal and the phase of the third RF sub-signal is equal to the second phase difference. For example, the phase of the third RF sub-signal can be set to 0, and the phase of the fourth RF sub-signal can be set to the second phase difference, that is,

[0137] In this case, when the satellite 20 receives the third radio frequency sub-signal, the phase of the third radio frequency sub-signal is:

[0138]

[0139] When the satellite 20 receives the fourth radio frequency sub-signal, the phase of the fourth radio frequency sub-signal is:

[0140]

[0141] It can be seen that when the satellite 20 receives the third RF sub-signal and the fourth RF sub-signal, the phase difference between the two signals is 0. In other words, the third RF sub-signal and the fourth RF sub-signal arrive at the satellite 20 at the same time. In this way, by compensating the phase difference of the fourth RF sub-signal, the third RF sub-signal and the fourth RF sub-signal can arrive at the satellite 20 at the same time, thus realizing the shaping of the uplink beam, so that the uplink beam has directionality and points to the satellite 20, thereby realizing the enhancement of the uplink RF signal.

[0142] It is easy to understand that in the above embodiment, only the electronic device 10 includes two groups of RF structures as an example to illustrate the signal transmission method provided in the embodiment of the present application. Here, a group of RF structures includes an antenna and an uplink and a downlink connected to the antenna. That is to say, the first antenna ANT1, the first uplink 110, and the first downlink 130 constitute the first RF structure; the second antenna ANT2, the second uplink 120, and the second downlink 140 constitute the second RF structure. In some other embodiments, when the electronic device 10 also includes more RF structures that are not listed, the first RF structure can be used as a reference, and each group of RF structures that are not listed can be used as a second RF structure to perform the above signal transmission method, so that the uplink beam is directional and points to the satellite 20. In this case, when the electronic device 10 includes N groups of RF structures, the above steps S110 to S140 need to be performed N-1 times. N is an integer greater than or equal to 2.

[0143] The process of determining the preset phase difference is described below.

[0144] As known from the above description, the preset phase difference is expressed by the formula: When the third radio frequency sub-signal and the fourth radio frequency sub-signal simultaneously reach the satellite 20, the preset phase difference is related to the following four parameters:

[0145] (1) That is, the phase change amount generated by the first uplink 110 and the first antenna ANT1 on the third RF sub-signal. Since the first uplink 110 includes the first sub-link 112 and the second sub-link 114, It can be expressed as:

[0146] in, is the phase change amount generated by the first sub-link 112 on the third RF sub-signal. is the phase change amount generated by the second sub-link 114 on the third RF sub-signal. It is the phase change amount generated by the first antenna ANT1 to the third radio frequency sub-signal.

[0147] (2) That is, the phase change amount generated by the second uplink 120 and the second antenna ANT2 on the fourth radio frequency sub-signal. Since the second uplink 120 includes the third sub-link 122 and the fourth sub-link 124, It can be expressed as:

[0148] in, is the phase change amount generated by the third sub-link 122 on the fourth RF sub-signal. is the phase change amount generated by the fourth sub-link 124 on the fourth radio frequency sub-signal. is the phase change amount generated by the second antenna ANT2 on the fourth radio frequency sub-signal.

[0149] (3) That is, the phase change amount generated by the first antenna ANT1 and the first downlink 130 on the first RF sub-signal. Since the first downlink 130 includes the fifth sub-link 132 and the sixth sub-link 134, It can be expressed as:

[0150] in, is the phase change amount generated by the fifth sub-link 132 on the first RF sub-signal. is the phase change amount generated by the sixth sub-link 134 on the first RF sub-signal. It is the phase change amount generated by the first antenna ANT1 for the first radio frequency sub-signal.

[0151] (4) That is, the phase change amount generated by the second antenna ANT2 and the second downlink 140 on the second RF sub-signal. Since the second downlink 140 includes the seventh sub-link 142 and the eighth sub-link 144, It can be expressed as:

[0152] in, is the phase change amount generated by the seventh sub-link 142 on the second radio frequency sub-signal. is the phase change amount generated by the eighth sub-link 144 on the second RF sub-signal. is the phase change amount generated by the second antenna ANT2 for the second radio frequency sub-signal.

[0153] In the embodiment of the present application, the specific value of the preset phase difference can be determined through the calibration process of the electronic device 10. Therefore, the calibration process of the electronic device 10 needs to be described first.

[0154] The calibration process of the electronic device 10 is generally divided into three types, namely: power-on calibration, factory calibration and darkroom calibration.

[0155] Power-on calibration refers to calibrating a certain electronic device in the electronic device 10 when the electronic device is powered on. In the RF structure, the electronic device that needs power-on calibration is generally an electronic device whose phase characteristics are prone to change (such as the phase characteristics change every time the power is turned on, or the phase characteristics change when the ambient temperature changes). For example, since the RF integrated circuit 12 is an active device and the phase is unstable, the RF integrated circuit 12 needs to be powered on and calibrated. In other words, the RF integrated circuit 12 needs to be calibrated every time the electronic device 10 starts satellite communication.

[0156] by Fig. 9 In the embodiment shown, since the first sub-link 112, the third sub-link 122, the fifth sub-link 132, and the seventh sub-link 142 are integrated in the RF integrated circuit 12, when determining the preset phase difference, The calibration can be performed during power-on calibration.

[0157] Factory calibration is applicable to electronic components with stable phases during the life cycle of the electronic device 10 , and generally, the electronic device 10 only needs to be calibrated once when it leaves the factory.

[0158] Darkroom calibration refers to calibration performed in a microwave darkroom, and is generally applicable to calibration involving air interface transceiver. Since satellite communications need to use authorized frequency bands, and air interface transceiver needs to comply with regulations and cannot be sent at will, calibration involving air interface transceiver needs to be performed in a microwave darkroom. Darkroom calibration is applicable to electronic devices with stable phases during the life cycle of the electronic device 10. For example, the calibration of the antenna involves air interface transceiver, and the phase of the antenna is stable, so the antenna needs to be calibrated in a darkroom. In addition, due to the high power of the transmitting part in the RF front-end module 14 and the need to release the signal energy through the antenna, and because the receiving part in the RF front-end module 14 cannot insert other electronic devices except the filter between the antenna in order to ensure the integrity of the link, the RF front-end module 14 also needs to be calibrated in a darkroom.

[0159] by Fig. 9 For the embodiment shown, the first antenna ANT1 and the second antenna ANT2 need to be calibrated in a darkroom. That is, when determining the preset phase difference, In addition, since the second sub-link 114, the fourth sub-link 124, the sixth sub-link 134, and the eighth sub-link 144 are integrated in the RF front-end module 14, when determining the preset phase difference, The determination can be done in a darkroom calibration.

[0160] Based on this, let:

[0161]

[0162] Then we have: It is the phase change amount generated by the second sub-link 114 and the first antenna ANT1 for the RF sub-signal of the second frequency (including the third RF sub-signal). It is the phase change amount generated by the fourth sub-link 124 and the second antenna ANT2 for the RF sub-signals of the second frequency (including the fourth RF sub-signal). It is the phase change amount generated by the sixth sub-link 134 and the first antenna ANT1 for the RF sub-signal of the first frequency (including the first RF sub-signal). It is the phase change amount generated by the eighth sub-link 144 and the second antenna ANT2 for the RF sub-signal of the first frequency (including the second RF sub-signal).

[0163] In this case, we can get:

[0164]

[0165] Below Fig. 9 Taking the electronic device 10 as an example, the power-on calibration of the RF integrated circuit 12 and the darkroom calibration of the RF front-end module 14 and the antenna are described from two parts, respectively, to obtain the specific value of the preset phase difference.

[0166] 1. The first part is power-on calibration of the RF integrated circuit 12.

[0167] The power-on calibration of the RFIC 12 is the calibration of the first sub-link 112, the third sub-link 122, the fifth sub-link 132, and the seventh sub-link 142. The power-on calibration of the RFIC 12 may include the following steps S210 and S220.

[0168] S210: The baseband BB calibrates the first sub-link 112 and the third sub-link 122 so that the phase changes generated by the first sub-link 112 and the third sub-link 122 for the radio frequency signal of the second frequency are the same.

[0169] S220: The baseband BB calibrates the fifth sub-link 132 and the seventh sub-link 142 so that the phase changes generated by the fifth sub-link 132 and the seventh sub-link 142 for the radio frequency signal of the first frequency are the same.

[0170] Step S210 and step S220 are located before step S110. Because in step S110, the first RF sub-signal received by the baseband BB through the first antenna ANT1 and the first downlink 130 (including the fifth sub-link 132 and the sixth sub-link 134), and the second RF sub-signal received through the second antenna ANT2 and the second downlink 140 (including the seventh sub-link 142 and the eighth sub-link 144) are all RF signals of the first frequency. Therefore, in step S220, when calibrating the fifth sub-link 132 and the seventh sub-link 142, it is necessary to make the fifth sub-link 132 and the seventh sub-link 142 produce the same phase change amount for the RF signal of the first frequency (including the first RF sub-signal and the second RF sub-signal). In this way, after calibration in step S220, it can be made

[0171] Similarly, in step S140, the third RF sub-signal transmitted by the baseband BB through the first uplink 110 (including the first sub-link 112 and the second sub-link 114) and the first antenna ANT1, and the fourth RF sub-signal transmitted through the second uplink 120 (including the third sub-link 122 and the fourth sub-link 124) and the second antenna ANT2 are all RF signals of the second frequency. Therefore, in step S110, when calibrating the first sub-link 112 and the third sub-link 122, it is necessary to make the first sub-link 112 and the third sub-link 122 produce the same phase change amount for the RF signal of the second frequency (including the third RF sub-signal and the fourth RF sub-signal). In this way, after the calibration of step S210, it can be made

[0172] The specific process of step S210 and step S220 is described below.

[0173] Step S210 and step S220 may be performed based on Fig.14 The electronic device 10 shown. Figure 8 , Fig. 9 The electronic device 10 shown in FIG. Fig.14 In the electronic device 10 shown, the first switch SW1 further has a fourth end 4 and a fifth end 5, the second switch SW2 further has a fourth end 4 and a fifth end 5, the third switch SW3 further has a fourth end 4 and a fifth end 5, and the fourth switch SW4 further has a fourth end 4 and a fifth end 5. The fourth end 4 of the first switch SW1 is connected to the fourth end 4 of the third switch SW3 through a wire; the fourth end 4 of the second switch SW2 is connected to the fourth end 4 of the fourth switch SW4 through a wire; the fifth end 5 of the second switch SW2 is connected to the fifth end 5 of the third switch SW3 through a wire; and the fifth end 5 of the first switch SW1 is connected to the fifth end 5 of the fourth switch SW4 through a wire.

[0174] Based on this, the present application embodiment provides the following three implementations of step S210 and step S220. It is understandable that those skilled in the art can expand more specific embodiments of step S210 and step S220 based on the following three implementations of step S210 and step S220.

[0175] 1. The first implementation method.

[0176] Step S220 includes the following steps S221A to S223A.

[0177] S221A, the baseband BB controls the fourth end 4 and the fifth end 5 of the second switch SW2 to be conductive with the first end 1, controls the fourth end 4 of the fourth switch SW4 to be conductive with the first end 1, and controls the fifth end 5 of the third switch SW3 to be conductive with the first end 1.

[0178] S222A, the second end 2 of the baseband BB outputs a first calibration signal of a first frequency to the third sub-link 122 .

[0179] S223A, the baseband BB determines the phase difference between the phase of the first calibration signal received by the third end 3 through the fifth sub-link 132 and the phase of the first calibration signal received by the fourth end 4 through the seventh sub-link 142, and compensates the phase difference to the seventh sub-link 142.

[0180] In this way, after the phase difference is compensated, the phase changes of the fifth sub-link 132 and the seventh sub-link 142 on the first frequency radio frequency signal (including the first calibration signal, the first radio frequency sub-signal, and the second radio frequency sub-signal) can be made the same, and at this time, the fifth sub-link 132 and the seventh sub-link 142 are said to be aligned. That is, after the phase difference is compensated,

[0181] It is easy to understand that there is an error δ in the baseband BB when determining the phase difference RX , so the phase difference determined in step S223A still has an error δ RX Similarly, due to the wire will bring a certain error δ 线 , so the phase difference determined in step S223A still has an error δ 线 That is, the error of the phase difference determined in step S223A is δ RX +δ 线 .

[0182] Step S210 includes the following steps S211A to S213A.

[0183] S211A, the baseband BB controls the first end 1 and the fourth end 4 of the first switch SW1 to be turned on, controls the first end 1 and the fourth end 4 of the second switch SW2 to be turned on, controls the first end 1 and the fourth end 4 of the third switch SW3 to be turned on, and controls the first end 1 and the fourth end 4 of the fourth switch SW4 to be turned on.

[0184] S212A, the first end 1 of the baseband BB outputs a second calibration signal of a second frequency to the first sub-link 112 , and at the same time, the second end 2 of the baseband BB outputs a third calibration signal of a second frequency to the third sub-link 122 .

[0185] S213A, the baseband BB determines the phase difference between the phase of the second calibration signal received by the third end 3 through the fifth sub-link 132 and the phase of the third calibration signal received by the fourth end 4 through the seventh sub-link 142, and compensates the phase difference to the third sub-link 122.

[0186] When the fifth sub-link 132 and the seventh sub-link 142 are aligned, through steps S211A to S213A, the phase changes of the first sub-link 112 and the third sub-link 122 on the second frequency radio frequency signal (including the second calibration signal, the third calibration signal, the third radio frequency sub-signal, and the fourth radio frequency sub-signal) can be the same, and at this time, the first sub-link 112 and the third sub-link 122 are aligned. That is, after the phase difference is compensated,

[0187] In this implementation, steps S221A to S223A must be performed first to align the fifth sub-link 132 and the seventh sub-link 142 , and then steps S211A to S213A must be performed to align the first sub-link 112 and the third sub-link 122 .

[0188] It is easy to understand that since the execution of steps S211A to S213A needs to be based on steps S221A to S223A, the error δ of the phase difference determined in step S223A will be RX +δ 线 Based on this, an error δ is introduced again RX +δ 线 In this case, the error of the phase difference determined in step S213A is 2δ RX +2δ 线 .

[0189] Among them, the error δ RX is a random error, which can be reduced by multiple measurements. That is, by performing steps S210 and S220 multiple times, the error δ RX Ignore it, so the only error left is 2δ caused by the wire 线The error 2δ caused by the wire 线 can be compensated in the subsequent darkroom calibration, so the error δ RX and 2δ 线 It will not affect the implementation of this plan.

[0190] 2. The second implementation method.

[0191] Step S220 includes the following steps S221B to S223B.

[0192] S221B, the baseband BB controls the fourth end 4 and the fifth end 5 of the second switch SW2 to be conductive with the first end 1, controls the fourth end 4 of the fourth switch SW4 to be conductive with the first end 1, and controls the fifth end 5 of the third switch SW3 to be conductive with the first end 1.

[0193] S222B, the second end 2 of the baseband BB outputs a first calibration signal of the first frequency to the third sub-link 122 .

[0194] S223B, the baseband BB determines the phase difference between the phase of the first calibration signal received by the third end 3 through the fifth sub-link 132 and the phase of the first calibration signal received by the fourth end 4 through the seventh sub-link 142, and compensates the phase difference to the seventh sub-link 142.

[0195] Steps S221B to S223B are the same as steps S221A to S223A and will not be repeated herein.

[0196] Step S210 includes the following steps S211B to S213B.

[0197] S211B, the baseband BB controls the first terminal 1 and the fourth terminal 4 of the first switch SW1 to be turned on, controls the first terminal 1 and the fifth terminal 5 of the second switch SW2 to be turned on, and controls the fourth terminal 4 and the fifth terminal 5 of the third switch SW3 to be turned on with the first terminal 1.

[0198] S212B, the first end 1 of the baseband BB outputs a second calibration signal of the second frequency to the first sub-link 112 , and at the same time, the second end 2 of the baseband BB outputs a third calibration signal of the second frequency to the third sub-link 122 .

[0199] S213B, the baseband BB determines the phase difference between the phase of the second calibration signal and the phase of the third calibration signal received by the third end 3 through the fifth sub-link 132 , and compensates the phase difference to the third sub-link 122 .

[0200] In this way, after the phase difference is compensated, the phase changes of the first sub-link 112 and the third sub-link 122 to the second frequency radio frequency signal (including the second calibration signal, the third calibration signal, the third radio frequency sub-signal, and the fourth radio frequency sub-signal) can be made the same, and at this time, the first sub-link 112 and the third sub-link 122 are said to be aligned. That is, after the phase difference is compensated,

[0201] In this embodiment, the implementation of steps S211B to S213B does not need to be based on steps S221B to S223B. Therefore, the errors of the phase differences determined in steps S223B and S213B are both δ RX +δ 线 Similarly, the error δ RX is a random error, which can be reduced by multiple measurements, so that only the error δ caused by the wire remains 线 The error δ caused by the wire 线 can be compensated in the subsequent darkroom calibration, so the error δ RX and δ 线 It will not affect the implementation of this plan.

[0202] In this embodiment, steps S221B to S223B may be performed first, and then steps S211B to S213B may be performed. Alternatively, in some other embodiments, steps S211B to S213B may be performed first, and then steps S221B to S223B may be performed.

[0203] 3. The third implementation method.

[0204] Step S220 includes the following steps S221C to S223C.

[0205] S221C, the baseband BB controls the fourth end 4 and the fifth end 5 of the second switch SW2 to be conductive with the first end 1, controls the fourth end 4 of the fourth switch SW4 to be conductive with the first end 1, and controls the fifth end 5 of the third switch SW3 to be conductive with the first end 1.

[0206] S222C, the second end 2 of the baseband BB outputs a first calibration signal of a first frequency to the third sub-link 122 .

[0207] S223C, the baseband BB determines the phase difference between the phase of the first calibration signal received by the third end 3 through the fifth sub-link 132 and the phase of the first calibration signal received by the fourth end 4 through the seventh sub-link 142, and compensates the phase difference to the seventh sub-link 142.

[0208] Steps S221C to S223C are the same as steps S221A to S223A and will not be repeated herein.

[0209] Step S210 includes the following steps S211C to S213C.

[0210] S211C, the baseband BB controls the first end 1 and the fifth end 5 of the first switch SW1 to be turned on, controls the first end 1 and the fourth end 4 of the second switch SW2 to be turned on, and controls the fourth end 4 and the fifth end 5 of the fourth switch SW4 to be turned on with the first end 1.

[0211] S212C, the first end 1 of the baseband BB outputs a second calibration signal of a second frequency to the first sub-link 112 , and at the same time, the second end 2 of the baseband BB outputs a third calibration signal of a second frequency to the third sub-link 122 .

[0212] S213C, the baseband BB determines the phase difference between the phase of the second calibration signal and the phase of the third calibration signal received by the fourth end 4 through the seventh sub-link 142 , and compensates the phase difference to the third sub-link 122 .

[0213] The principle of steps S211C to S213C is the same as that of steps S211B to S213B, and will not be described in detail. In this embodiment, the phase difference errors determined in steps S211C and S213C are both δ RX +δ 线 .

[0214] In this embodiment, steps S221C to S223C may be performed first, and then steps S211C to S213C may be performed. Alternatively, in some other embodiments, steps S211C to S213C may be performed first, and then steps S221C to S223C may be performed.

[0215] By executing step S210 and step S220, that is, power-on calibration of the RF integrated circuit 12, the And make In this case, the preset phase difference can be expressed using the formula:

[0216]

[0217] It can be seen that after the first sub-link 112 and the third sub-link 122 are calibrated, and the fifth sub-link 132 and the seventh sub-link 142 are calibrated, the preset phase difference is only The four parameters are related, and the preset phase difference is In this case, the preset phase difference can be determined by darkroom calibration.

[0218] At the same time, the RF integrated circuit 12 is powered on and calibrated. And make In the case of , the first phase difference can be expressed using the formula:

[0219]

[0220] 2. The second part is the darkroom calibration of the RF front-end module 14 and the antenna.

[0221] right Fig. 9 For the embodiment shown, the power-on calibration of the RF front-end module 14 is the calibration of the second sub-link 114, the fourth sub-link 124, the sixth sub-link 134, and the eighth sub-link 144. The darkroom calibration of the RF front-end module 14 and the antenna may include the following steps S310 to S340. Steps S310 to S340 need to be performed in a microwave darkroom.

[0222] S310, the baseband BB receives the third RF signal through the first antenna ANT1 and the first downlink 130 to obtain a fifth RF sub-signal; and the baseband BB receives the third RF signal through the second antenna ANT2 and the second downlink 140 to obtain a sixth RF sub-signal.

[0223] Fig.15 FIG. 1 is a schematic diagram of a scene of a darkroom calibration of an electronic device 10 provided in an embodiment of the present application. Fig.15 As shown, the microwave darkroom for darkroom calibration has a comprehensive tester 30. The comprehensive tester 30 includes a vector signal generator (vectorsignal generator, VSG) and a vector signal analyzer (vector signal analyzer, VSA). VSG can generate various types of vector signals, including digital modulation signals, analog modulation signals, and continuous wave signals. These signals can simulate the radio frequency signal transmitted by the satellite 20 in satellite communication. VSA can analyze the received radio frequency signal (the radio frequency signal is a vector signal) to obtain the frequency, amplitude, phase, modulation quality, spectrum characteristics, etc. of the radio frequency signal.

[0224] The third RF signal is a downlink RF signal transmitted by the comprehensive tester 30. The electronic device 10 can receive the third RF signal through the first antenna ANT1 and the second antenna ANT2. For ease of description, the signal obtained by the baseband BB receiving the third RF signal through the first antenna ANT1 and the first downlink 130 is called the fifth RF sub-signal; the signal obtained by the baseband BB receiving the third RF signal through the second antenna ANT2 and the second downlink 140 is called the sixth RF sub-signal. Here, the third RF signal has a first frequency. That is to say, the frequency of the fifth RF sub-signal and the frequency of the sixth RF sub-signal are also the first frequency.

[0225] S320: The baseband BB determines a difference between the phase of the fifth RF sub-signal and the phase of the sixth RF sub-signal to obtain a third phase difference.

[0226] like Fig.15 As shown, use Indicates the phase change caused by the distance from the first antenna ANT1 to the comprehensive tester 30 to the radio frequency signal (including the fifth radio frequency sub-signal); use It indicates the phase change amount of the radio frequency signal (including the sixth radio frequency sub-signal) caused by the distance from the comprehensive tester 30 to the second antenna ANT2.

[0227] Based on this, when the first sub-link 112 and the third sub-link 122 are calibrated, and the fifth sub-link 132 and the seventh sub-link 142 are calibrated, the third phase difference can be expressed as:

[0228] in, Still represents the phase change amount generated by the sixth sub-link 134 and the first antenna ANT1 to the radio frequency signal of the first frequency (including the fifth radio frequency sub-signal); It still represents the phase change amount generated by the eighth sub-link 144 and the second antenna ANT2 for the radio frequency signal of the first frequency (including the sixth radio frequency sub-signal).

[0229] It is easy to understand that this formula is an expression of the third phase difference. In actual situations, the baseband BB of the electronic device 10 can calculate the specific value of the third phase difference.

[0230] S330 , the baseband BB transmits a seventh radio frequency sub-signal to the comprehensive tester 30 through the first uplink 110 and the first antenna ANT1 , and transmits an eighth radio frequency sub-signal to the comprehensive tester 30 through the second uplink 120 and the second antenna ANT2 .

[0231] The seventh RF sub-signal and the eighth RF sub-signal are both sub-signals of the fourth RF signal. The fourth RF signal is an uplink RF signal transmitted by the electronic device 10 to the VSA of the comprehensive tester 30. Here, the seventh RF sub-signal refers to the fourth RF signal transmitted through the first uplink 110 and the first antenna ANT1; the eighth RF sub-signal refers to the fourth RF signal transmitted through the second uplink 120 and the second antenna ANT2. The fourth RF signal has a second frequency. That is, the frequency of the seventh RF sub-signal and the frequency of the eighth RF sub-signal are both the second frequency.

[0232] In step S330, the difference between the phase of the eighth RF sub-signal and the phase of the seventh RF sub-signal is equal to the third phase difference. For example, the phase of the seventh RF sub-signal can be set to 0, and the phase of the eighth RF sub-signal can be set to the third phase difference, that is, the phase of the eighth RF sub-signal can be expressed as

[0233] Based on this, when using The phase change amount of the RF signal (including the seventh RF sub-signal) caused by the distance from the first antenna ANT1 to the comprehensive tester 30 is expressed by The phase change amount of the radio frequency signal (including the eighth radio frequency sub-signal) caused by the distance from the comprehensive tester 30 to the second antenna ANT2 is expressed by represents the phase change amount generated by the second sub-link 114 and the first antenna ANT1 for the second frequency RF sub-signal (including the seventh RF sub-signal); and still using In the case where the phase change amount generated by the fourth sub-link 124 and the second antenna ANT2 for the second frequency RF sub-signal (including the eighth RF sub-signal), the phase of the seventh RF sub-signal received by the VSA can be expressed as The phase of the eighth RF sub-signal received by the VSA can be expressed as Right now

[0234] S340, the comprehensive tester 30 subtracts the phase of the received eighth radio frequency sub-signal from the phase of the received seventh radio frequency sub-signal to obtain a preset phase difference.

[0235] According to step S330, the comprehensive tester 30 subtracts the phase of the received seventh RF sub-signal from the phase of the received eighth RF sub-signal, and the result is:

[0236] Thus, in step S340, the phase of the seventh RF sub-signal received by the comprehensive tester 30 minus the phase of the eighth RF sub-signal received is the preset phase difference. Similarly, in step S340, the comprehensive tester 30 can obtain the specific value of the preset phase difference.

[0237] Fig.16 FIG. 1 is a schematic diagram of a scenario in which an electronic device 10 performs satellite communication according to an embodiment of the present application. Fig.16 As shown, still use The phase change amount of the radio frequency signal (including the first radio frequency sub-signal and the third radio frequency sub-signal) caused by the distance from the satellite 20 to the first antenna ANT1 is expressed by The phase change amount of the radio frequency signal (including the second radio frequency sub-signal and the fourth radio frequency sub-signal) caused by the distance from the satellite 20 to the second antenna ANT2 is expressed. In this way, when the specific value of the preset phase difference is obtained, when the electronic device 10 performs satellite communication, after calibrating the first sub-link 112 and the third sub-link 122, and calibrating the fifth sub-link 132 and the seventh sub-link 142, the executed steps S110 to S140 may be specifically:

[0238] After the baseband BB receives the first RF sub-signal and the second RF sub-signal, it obtains the phase difference between the first RF sub-signal and the second RF sub-signal, that is, the first phase difference. The first phase difference is expressed as Since the satellite 20 is far away from the electronic device 10, the first phase difference basically depends on the position of the electronic device 10 relative to the satellite 20 (including the position and attitude of the electronic device 10 relative to the satellite 20). The baseband BB adds the first phase difference to the preset phase difference to obtain the second phase difference, which is expressed as Therefore, the second phase difference is expressed as When the baseband BB transmits the third radio frequency sub-signal and the fourth radio frequency sub-signal, the phase of the third radio frequency sub-signal may be set to 0, and the phase of the fourth radio frequency sub-signal may be set to In this case, when the satellite 20 receives the third radio frequency sub-signal, the phase of the third radio frequency sub-signal is: When the satellite 20 receives the fourth radio frequency sub-signal, the phase of the fourth radio frequency sub-signal is: Right now It can be seen that when the satellite 20 receives the third radio frequency sub-signal and the fourth radio frequency sub-signal, the phase difference between the two signals is 0. In other words, the third radio frequency sub-signal and the fourth radio frequency sub-signal arrive at the satellite 20 at the same time.

[0239] In the darkroom calibration of the RF front-end module 14 and the antenna, i.e., in steps S310 to S340, when determining the preset phase difference, since the complete downlink (including the first downlink 130 and the second downlink 140) and the uplink (including the first uplink 110 and the second uplink 120) are used, the wire error δ generated in steps S210 and S220 can be 线 (or 2δ 线 ) is used for compensation. When determining the preset phase difference, in steps S310 to S340, since the baseband BB has an error δ when determining the phase difference RX , and there is an error δ when the comprehensive tester 30 works 综 , so the final preset phase difference still has an error δ RX +δ 综 Error δ RX and error δ 综 All of them are random errors and can be reduced by multiple measurements. That is, by measuring the preset phase difference multiple times, the preset phase difference finally obtained can be made to have no error or negligible error.

[0240] In the above embodiment, only Fig. 9Taking the electronic device 10 shown in the figure as an example, the power-on calibration of the RF integrated circuit 12 and the darkroom calibration of the RF front-end module 14 and the antenna are described. It is easy to understand that in some other embodiments, when the structure of the electronic device 10 is as follows Fig.11 As shown, when the sixth sub-link 134 also includes the second low noise amplifier LNA2 located in the RF integrated circuit 12 and the eighth sub-link 144 also includes the fourth low noise amplifier LNA4 located in the RF integrated circuit 12, when the RF integrated circuit 12 is powered on and calibrated, it is not necessary to perform power-on calibration on the second low noise amplifier LNA2 and the fourth low noise amplifier LNA4. In this case, the phase difference caused by the second low noise amplifier LNA2 to the RF signal will be included in the power-on calibration. included in The phase difference caused by the fourth low noise amplifier LNA4 to the RF signal will be included in included in Similarly, in other embodiments, when the structure of the electronic device 10 is as follows Fig.12 As shown, when the second sub-link 114 also includes the first driver amplifier DA1 located in the RF integrated circuit 12 and the fourth sub-link 124 also includes the second driver amplifier DA2 located in the RF integrated circuit 12, when the RF integrated circuit 12 is powered on and calibrated, it is not necessary to perform power-on calibration on the first driver amplifier DA1 and the second driver amplifier DA2. In this case, the phase difference caused by the first driver amplifier DA1 to the RF signal will be included in the included in The phase difference caused by the second driving amplifier DA2 to the RF signal will be included in included in Inside.

[0241] It is easy to understand that since the calibration of the RF integrated circuit 12 is a power-on calibration, the signal transmission method provided in the embodiment of the present application needs to perform power-on calibration on the RF integrated circuit 12 when the preset phase difference needs to be determined before the electronic device 10 leaves the factory. After the electronic device 10 leaves the factory, the RF integrated circuit 12 also needs to be calibrated before each execution of step S110 (i.e., before each satellite communication).

[0242] It is easy to understand that in the above embodiment, the signal transmission method (including the process of determining the preset phase difference) is described only by taking the electronic device 10 for receiving a radio frequency signal of a first frequency and transmitting a radio frequency signal of a second frequency as an example. According to the above embodiment, when any one of the following six parameters changes, the preset phase difference may change: (1) the frequency of the uplink radio frequency signal; (2) the frequency of the downlink radio frequency signal; (3) the gain multiple of the driving amplifier in the first sub-link 112 and the third sub-link 122; (4) the gain multiple of the power amplifier in the second sub-link 114 and the fourth sub-link 124; (5) the gain multiple of the low noise amplifier in the radio frequency front-end module 14 in the downlink; (6) the gain multiple of the low noise amplifier in the radio frequency integrated circuit 12 in the downlink. Based on this, the signal transmission method provided in the embodiment of the present application needs to determine the preset phase difference for any combination of these six parameters, and use the corresponding preset phase difference when executing steps S110 to S140, which will not be described in detail.

[0243] The signal transmission method provided in the embodiment of the present application is further expanded from two aspects as follows.

[0244] 1. In a first aspect, a signal transmission method supports an electronic device 10 of TDD and FDD.

[0245] 1. Signal Transmission Method An electronic device 10 supports TDD.

[0246] For the TDD electronic device 10, in addition to the above-mentioned calibration of the RF integrated circuit 12, the calibration of the RF front-end module 14 and the calibration of the antenna, the electronic device 10 also includes in-phase (I) and quadrature (Q) calibration (hereinafter referred to as IQ calibration), direct current (DC) calibration, and digital pre-distortion (DPD) calibration. Among them, IQ calibration is used to eliminate the amplitude imbalance and phase error between the in-phase and quadrature signals. DC calibration is used to eliminate the DC offset caused when the electronic device 10 receives and transmits RF signals. DPD calibration is used to improve the linearity of the power amplifier in the RF front-end module 14.

[0247] Fig.17 FIG. 1 is a circuit diagram of another electronic device 10 provided in an embodiment of the present application. Fig.17 As shown, compared to Fig.14 In the electronic device 10 shown, a phase shifter is connected between the fourth end of the first switch SW1 and the fourth end of the third switch SW3, and a phase shifter is also connected between the fourth end of the second switch SW2 and the fourth end of the fourth switch SW4 for IQ calibration. Fig.14 The electronic device 10 shown, Fig.17 The electronic device 10 shown also includes a first coupler 152 and a second coupler 154. The first coupler 152 is coupled between the first power amplifier PA1 and the first antenna ANT1, and is connected to the sixth end 6 of the third switch SW3. In this way, when the second end 2 of the first switch SW1 is turned on with the first end 1, and the sixth end 6 of the third switch SW3 is turned on with the first end 1, a calibration loop can be formed starting from the first end 1 of the baseband BB, passing through the first sub-link 112, the second sub-link 114, the first coupler 152, and the fifth sub-link 132 and returning to the third end 3 of the baseband BB. The calibration loop can be used to perform DPD calibration on the first power amplifier PA1. The second coupler 154 is coupled between the second power amplifier PA2 and the second antenna ANT2, and is connected to the sixth end 6 of the fourth switch SW4. In this way, when the second end 2 of the second switch SW2 is connected to the first end 1, and the sixth end 6 of the fourth switch SW4 is connected to the first end 1, a calibration loop can be formed starting from the second end 2 of the baseband BB, passing through the third sub-link 122, the fourth sub-link 124, the second coupler 154, the fourth switch SW4, and the seventh sub-link 142 and returning to the fourth end 4 of the baseband BB. The calibration loop can be used to perform DPD calibration on the second power amplifier PA2.

[0248] In the embodiment of the present application, when the signal transmission method requires an electronic device 10 that supports TDD, then:

[0249] Before the electronic device 10 leaves the factory, the electronic device 10 may sequentially perform IQ calibration and DC calibration, power-on calibration of the RF integrated circuit 12 (steps S210 and S220), DPD calibration, and darkroom calibration of the RF front-end module 14 and the antenna (steps S310 to S340).

[0250] After the electronic device 10 leaves the factory, each time the user uses the satellite communication function of the electronic device 10, before step S110, the electronic device 10 may also sequentially perform IQ calibration and DC calibration, and power-on calibration of the RF integrated circuit 12 (steps S210 and S220). When the electronic device 10 performs satellite communication, receives and transmits the first data packet (i.e., when performing steps S110 and S140 for the first time), DPD calibration may also be performed.

[0251] It is easy to understand that the same calibration loop is required for IQ calibration and calibration of the RFIC 12. Therefore, the phase shifter needs to be turned on during IQ calibration; when the IQ calibration is completed and the RFIC 12 needs to be powered on for calibration, the phase shifter needs to be turned off.

[0252] It is easy to understand that during the use of the electronic device 10, the phase characteristic of the antenna generally does not change, that is, Generally, there will be no change, but the RF front-end module 14 will age, resulting in Based on this, in the embodiment of the present application, the DPD calibration loop can also be used to compensate for the phase shift caused by aging of the RF front-end module 14.

[0253] Specifically, after the electronic device 10 leaves the factory, when the electronic device 10 performs satellite communication for the first time and executes step S140, the baseband BB can detect the phase of the transmitted third RF sub-signal through the first coupler 152 and the fifth sub-link 132. Thereafter, each time the electronic device 10 performs satellite communication and executes step S140, the baseband BB can detect the phase of the transmitted third RF sub-signal through the first coupler 152 and the fifth sub-link 132. As the RF front-end module 14 ages, when the electronic device 10 performs satellite communication for the Nth time and executes step S140, the phase of the third RF sub-signal detected by the baseband BB will change compared to the phase of the third RF sub-signal detected for the first time. In this case, the baseband BB can calculate the phase difference, and when the electronic device 10 performs satellite communication for the N+1th time and executes step S140, the phase difference is compensated to the third RF sub-signal, thereby offsetting the phase offset caused by the aging of the RF front-end module 14. N is an integer greater than or equal to 2.

[0254] Similarly, each time the electronic device 10 performs satellite communication and executes step S140, the baseband BB can also detect the phase of the transmitted fourth radio frequency sub-signal through the second coupler 154 and the seventh sub-link 142. When the electronic device 10 performs satellite communication for the N+1th time and executes step S140, the baseband BB can perform phase compensation on the fourth radio frequency sub-signal, thereby offsetting the phase offset caused by aging of the radio frequency front-end module 14.

[0255] It is easy to understand that, since the error of a single phase measurement is relatively large, the baseband BB can retain the phase of the third RF sub-signal and the phase of the fourth RF sub-signal detected each time, and compensate the phase of the third RF sub-signal and the phase of the fourth RF sub-signal according to their changing trends when the electronic device 10 performs satellite communication for the N+1th time and executes step S140. In this way, the impact of aging of the RF front-end module 14 on the uplink can be reduced.

[0256] 2. Signal transmission method The electronic device 10 supports FDD.

[0257] For the FDD electronic device 10, in addition to the above calibration of the RF IC 12, the RF front-end module 14 and the antenna, the electronic device 10 also includes IQ calibration, DC calibration and DPD calibration.

[0258] Different from the embodiment of "the electronic device 10 supporting TDD in the signal transmission method", in the FDD electronic device 10, the uplink and the downlink need to operate at different frequencies. Fig.18 As shown, compared to Fig.14 The electronic device 10 shown, the electronic device 10 supporting FDD needs to further include a diversity reception link 160. The diversity reception link 160 operates at the same frequency as the first uplink 110 and the second uplink 120, that is, the diversity reception link 160 also operates at the second frequency.

[0259] Specifically, if Fig.18 As shown, the first end of the diversity reception link 160 is connected to the fifth end 5 of the baseband BB. The diversity reception link 160 includes a third analog-to-digital converter ADC-RX3, a seventeenth filter F17, an eighteenth filter F18, a fifth mixer mixer5 and a fifth switch SW5. Among them, the third analog-to-digital converter ADC-RX3 includes a third in-phase analog-to-digital converter ADC-I5 and a third orthogonal analog-to-digital converter ADC-Q5. The seventeenth filter F17 and the eighteenth filter F18 can be LPFs. The first end 1 of the fifth switch SW5 is connected to the fifth mixer mixer5, the second end 2 of the fifth switch SW5 is connected to the first coupler 152, and the third end 3 of the fifth switch SW5 is connected to the second coupler 154. In this way, when the second end 2 of the first switch SW1 is connected to the first end 1, and the second end 2 of the fifth switch SW5 is connected to the first end 1, a calibration loop can be formed starting from the first end 1 of the baseband BB, passing through the first sub-link 112, the second sub-link 114, the first coupler 152, and the diversity reception link 160 to return to the fifth end 5 of the baseband BB. The calibration loop can be used to perform DPD calibration on the first power amplifier PA1. When the second end 2 of the second switch SW2 is connected to the first end 1, and the third end 3 of the fifth switch SW5 is connected to the first end 1, a calibration loop can be formed starting from the second end 2 of the baseband BB, passing through the third sub-link 122, the fourth sub-link 124, the second coupler 154, and the diversity reception link 160 to return to the fifth end 5 of the baseband BB. The calibration loop can be used to perform DPD calibration on the second power amplifier PA2.

[0260] In the embodiment of the present application, the electronic device 10 may further include a first phase-locked loop and a second phase-locked loop. The first phase-locked loop is used to connect with the first mixer mixer1, the second mixer mixer2 and the fifth mixer mixer5. The second phase-locked loop is used to connect with the third mixer mixer3 and the fourth mixer mixer4. In other words, the first mixer mixer1, the second mixer mixer2 and the fifth mixer mixer5 multiplex a phase-locked loop.

[0261] In the embodiment of the present application, when the signal transmission method is used for an electronic device 10 supporting FDD, then:

[0262] Before the electronic device 10 leaves the factory, the electronic device 10 may sequentially perform IQ calibration and DC calibration, power-on calibration of the RF integrated circuit 12 (steps S210 and S220), DPD calibration, and darkroom calibration of the RF front-end module 14 and the antenna (steps S310 to S340).

[0263] After the electronic device 10 leaves the factory, each time the user uses the satellite communication function of the electronic device 10, before step S110, the electronic device 10 may also sequentially perform IQ calibration and DC calibration, and power-on calibration of the RF integrated circuit 12 (steps S210 and S220). When the electronic device 10 performs satellite communication, receives and transmits the first data packet (i.e., when performing steps S110 and S140 for the first time), DPD calibration may also be performed.

[0264] It is easy to understand that the same calibration loop is required for IQ calibration and calibration of the RFIC 12. Therefore, the phase shifter needs to be turned on during IQ calibration; when the IQ calibration is completed and the RFIC 12 needs to be powered on for calibration, the phase shifter needs to be turned off.

[0265] It is easy to understand that in this embodiment, the DPD calibration loop can also be used to compensate for the phase shift caused by aging of the RF front-end module 14, which will not be described in detail.

[0266] 2. The second aspect is the response of signal transmission methods in special scenarios.

[0267] 1. The first special scenario: the posture of the electronic device 10 changes.

[0268] In some embodiments, in order to improve the accuracy of the electronic device 10 determining the first phase difference when executing step S120, the electronic device 10 may specifically perform the following when executing step S110:

[0269] The baseband BB receives multiple first RF signals through the first antenna ANT1 and the first downlink 130 to obtain multiple first RF sub-signals; and the baseband BB receives multiple first RF signals through the second antenna ANT2 and the second downlink 140 to obtain multiple second RF sub-signals.

[0270] Specifically, as mentioned above, when the electronic device 10 performs satellite communication, the electronic device 10 may receive multiple data packets, each of which includes multiple OFDM symbols, each of which includes multiple subcarriers, and the frequencies of the kth subcarriers in different OFDM symbols are the same. Here, "multiple first RF signals" refer to the kth subcarrier in each OFDM symbol in multiple OFDM symbols in one or more data packets transmitted by the satellite 20 to the electronic device 10. The multiple first RF sub-signals correspond one to one with the multiple second RF sub-signals.

[0271] Based on this, step S120 may specifically include the following steps S121 to S122.

[0272] S121, the baseband BB determines the difference between the phase of each first RF sub-signal and the phase of the corresponding second RF sub-signal to obtain a plurality of differences.

[0273] S122: The baseband BB uses an average value of the multiple differences as a first phase difference.

[0274] That is to say, since the influence of the Doppler effect on the phase difference calculation of the subcarrier can be ignored, even if the Doppler parameters have changed between multiple consecutive OFDM symbols (multiple OFDM symbols can be located in one or more data packets), the influence of the Doppler effect on the phase difference calculation of the subcarrier can still be ignored. In this case, in order to improve the accuracy of the first phase difference, when calculating the first phase difference, the baseband BB can take multiple OFDM symbols within a period of time (hereinafter referred to as the "first period of time"), and calculate the phase difference of multiple first RF sub-signals and the corresponding second RF sub-signals within a second period of time after the first period of time, and take the average value to obtain the first phase difference, so as to reduce the measurement error. In an embodiment of the present application, the time period from the start time of the first period of time to the end time of the second period of time is referred to as the preset period of time. That is to say, the preset period of time is the period of time during which the baseband BB receives multiple first RF sub-signals and multiple second RF sub-signals, and calculates multiple phase differences and takes the average value to obtain the first phase difference.

[0275] However, it is easy to understand that the first phase difference depends on the position and posture of the electronic device 10 relative to the satellite 20 (including the position and attitude of the electronic device 10 relative to the satellite 20). Therefore, only when the position and posture of the electronic device 10 does not change within the preset time length, the steps S110 and S120 in the above embodiment can have the effect of "improving the accuracy of the first phase difference". If the position and posture of the electronic device 10 changes within the preset time length, the steps S110 and S120 in the above embodiment do not have the effect of "improving the accuracy of the first phase difference".

[0276] In the embodiment of the present application, the electronic device 10 may further include a processor, a gyroscope, and an acceleration sensor. The processor may be a central processing unit (CPU) in the electronic device 10 or other electronic device with processing functions. The gyroscope is used to detect the angular velocity of the electronic device 10; the acceleration sensor is used to detect the acceleration of the electronic device 10. The processor is connected to the gyroscope and the acceleration sensor, and is used to obtain the angular velocity of the electronic device 10 detected by the gyroscope, and is used to obtain the acceleration of the electronic device 10 detected by the acceleration sensor. The processor can determine whether the posture of the electronic device 10 changes within a preset time length based on the angular velocity and acceleration of the electronic device 10. For example, if within the preset time length, the processor determines that the angular velocity of the electronic device 10 is greater than or equal to the first threshold, and / or the processor determines that the acceleration of the electronic device 10 is greater than or equal to the second threshold, then the processor determines that the posture of the electronic device 10 changes within the preset time length.

[0277] In some other embodiments, the gyroscope and the acceleration sensor may also be integrated into the posture sensor.

[0278] In an embodiment of the present application, when the processor determines that the posture of the electronic device 10 has not changed within a preset time length, the processor may transmit a first preset instruction to the baseband BB. The first preset instruction is used to indicate that the posture of the electronic device 10 has not changed within a preset time length (or that the change in the posture of the electronic device 10 within the preset time length meets the preset conditions). When the processor determines that the posture of the electronic device 10 has changed within a preset time length, the processor may transmit a second preset instruction to the baseband BB. The second preset instruction is used to indicate that the posture of the electronic device 10 has changed within a preset time length (or that the change in the posture of the electronic device 10 within the preset time length does not meet the preset conditions).

[0279] Based on this, step S140 may specifically be: if the baseband BB receives the first preset instruction, a third RF sub-signal is transmitted through the first uplink 110 and the first antenna ANT1, and a fourth RF sub-signal is transmitted through the second uplink 120 and the second antenna ANT2.

[0280] In parallel with step S140, the signal transmission method provided in the embodiment of the present application may further include the following steps: if the baseband BB receives a second preset instruction, the currently calculated first phase difference is discarded, and step S110 is re-executed.

[0281] It is easy to understand that when step S110 is re-executed, the baseband BB can shorten the preset duration. The baseband BB can shorten the preset duration by reducing the number of the received multiple first RF sub-signals and multiple second RF sub-signals.

[0282] 2. The second special scenario: the user holds the antenna in his hand.

[0283] When the electronic device 10 includes a first antenna ANT1 and a second antenna ANT2 for satellite communication, and at least one of the first antenna ANT1 and the second antenna ANT2 is held by a user, the accuracy of the first phase difference will be affected. Therefore, before step S120, the radio frequency transmission method may further include the following steps:

[0284] S410: The processor determines whether the user is holding the first antenna ANT1 and the second antenna ANT2.

[0285] The processor here can be the processor in the "first special scenario" or another electronic device with processing function, such as baseband BB, etc. In the embodiment of the present application, the processor can determine whether the user is holding the first antenna ANT1 and the second antenna ANT2 in the following two different ways.

[0286] (1) The frame of the RF front-end module 14 of the electronic device 10 may be provided with a plurality of grip sensors 170, and each grip sensor 170 may be used to detect whether the user is holding the position of the grip sensor 170 of the electronic device 10. In some specific embodiments, the grip sensor 170 may include a capacitor. When the user holds the position of the grip sensor 170, the capacitance of the capacitor may change. The processor is connected to the plurality of grip sensors 170 to detect the capacitance of the capacitor in each grip sensor 170, thereby determining whether the user is holding the position of any grip sensor 170.

[0287] Fig.19 1 is a schematic diagram of the position of a hand grip sensor 170 provided in an embodiment of the present application. Fig.19As shown, the hand holding sensor 170 can be located near the first antenna ANT1 and the second antenna ANT2. In addition, a hand holding sensor 170 can also be provided at one end of the electronic device 10 away from the first antenna ANT1 and the second antenna ANT2. Based on multiple hand holding sensors 170, the processor can determine that the user's holding position includes the following three types: ① The user does not hold the first antenna ANT1 and the second antenna ANT2; ② The user holds the antenna position (including the user only holds the first antenna ANT1, or the user only holds the second antenna ANT2, or the user holds the first antenna ANT1 and the second antenna ANT2) but does not hold the electronic device 10 away from the first antenna ANT1 and the second antenna ANT2 (the lower end along the paper direction); ③ The user holds the antenna position and holds the electronic device 10 away from the first antenna ANT1 and the second antenna ANT2.

[0288] Fig. 20 and Fig.21 is a schematic diagram of two different user holding positions provided in an embodiment of the present application, and the portion framed by a dotted line in the figure represents the user's holding position. Fig. 20 In the embodiment shown, the user only holds the first antenna ANT1; Fig.21 In the illustrated embodiment, the user holds the first antenna ANT1 and the second antenna ANT2. Fig. 20 The embodiments shown and Fig.21 The embodiments shown all belong to the above situation ②.

[0289] (2) As mentioned above, to perform DPD calibration, the electronic device 10 further includes a first coupler 152 and a second coupler 154 to form a DPD calibration loop. Here, the DPD calibration loop can be reused to determine whether the user is holding the antenna position.

[0290] For example, when the user holds the position where the first antenna ANT1 is located, the impedance of the first antenna ANT1 will change. In this case, in order to detect whether the user is holding the position where the first antenna ANT1 is located, the baseband BB can control the formation of a calibration loop starting from the first end 1 of the baseband BB, through the first sub-link 112, the second sub-link 114, the first coupler 152, and the fifth sub-link 132 and returning to the third end 3 of the baseband BB. At this time, the baseband BB can transmit a radio frequency signal from the first end 1 and receive the radio frequency signal through the third end 3 of the baseband BB. The baseband BB can determine the impedance of the first antenna ANT1 by detecting the phase and amplitude of the radio frequency signal received by the third end 3, thereby determining whether the user is holding the position where the first antenna ANT1 is located. According to the same principle, the baseband BB can also determine whether the user is holding the position where the second antenna ANT2 is located.

[0291] Based on step S410, step S120 is specifically as follows: if the user does not hold the position of the first antenna ANT1 and does not hold the position of the second antenna ANT2, the baseband BB determines the difference between the phase of the first RF sub-signal and the phase of the second RF sub-signal to obtain a first phase difference.

[0292] That is to say, when the user's holding position belongs to the above-mentioned situation ①, step S120 and subsequent steps can be executed.

[0293] For the above-mentioned situations ② and ③, the radio frequency control method provided in the embodiment of the present application may have the following two processing methods.

[0294] 1) The first approach.

[0295] Prompt the user with a recommended holding position. When the processor determines that the user's holding position belongs to the above situation ② or situation ③, the user may be prompted by at least one of sound, image, and vibration.

[0296] In some embodiments, the sound prompt may be, for example: please hold the lower part of the electronic device; or, do not hold the top of the electronic device.

[0297] In some embodiments, the image prompt may be as follows: Fig. 22 As shown. Fig. 22 In the embodiment shown, the prompt image includes the following three contents:

[0298] 1. User holding position image. Fig.23 is a schematic diagram of a user holding position image provided by an embodiment of the present application, such as Fig.23 As shown in the figure, in this image, the hand of the user holding the electronic device 10 includes a solid line part and a dotted line part. The solid line part is used to represent the part of the user's hand that is not blocked by the electronic device 10 at this viewing angle; the dotted line part is used to represent the part of the user's hand that is blocked by the electronic device 10 at this viewing angle. In practical applications, the transparency of the dotted line part shown in the figure can be set to express that the part is blocked by the electronic device 10. For example, the transparency of the blocked part can be set to 5% to 40%; the transparency of the unblocked part can be set to 0 (completely opaque).

[0299] In addition, Fig. 22 and Fig.23 In the user holding position image shown in FIG. 1 , the user holds the electronic device 10 with his left hand. In some other embodiments, the user holding position image may also be as shown in FIG. Fig.24 As shown. Fig.24 In the embodiment, the user holds the electronic device 10 with his right hand. In some other embodiments, the user holding image may include Fig.23 The images shown and Fig.24 Image shown.

[0300] 2. The orientation of the electronic device 10. Fig. 22 In the figure, the arrow is used to indicate the direction of the electronic device 10. Generally, the first antenna ANT1 and the second antenna ANT2 are arranged on the top of the electronic device 10. When performing satellite communication, the first antenna ANT1 and the second antenna ANT2 can face the sky. Based on this, a text prompt can be used next to the arrow: the top of the electronic device faces the sky.

[0301] 3. The boundary between the top and the bottom. Fig. 22 In FIG. 1 , a horizontal dotted line is used to show the boundary between the top and the bottom. The first antenna ANT1 and the second antenna ANT2 are disposed at the top of the electronic device 10 , and the user can hold the bottom of the electronic device 10 .

[0302] 2) The second approach.

[0303] As mentioned above, when the signal transmission method provided in the embodiment of the present application is executed, the electronic device 10 used should at least include a first antenna ANT1 and a second antenna ANT2. In some embodiments, the electronic device 10 may also include a third antenna ANT3, a fourth antenna ANT4, and the like.

[0304] In this embodiment, when the processor detects that the user is holding the antenna, it can determine whether the antenna not held by the user supports the signal transmission method provided in the embodiment of the present application. In other words, when the processor detects that the user is holding the antenna, it can determine whether the number of antennas not held by the user is greater than or equal to 2.

[0305] like Fig.25 As shown, when the number of antennas not held by the user is greater than or equal to 2, it indicates that the antennas not held by the user can support the signal transmission method provided in the embodiment of the present application. In this case, the above steps S110 to S140 can be performed by the antennas not held.

[0306] like Fig. 20 and Fig.21 As shown, when the number of antennas not held by the user is less than 2, it indicates that the antennas not held by the user cannot support the signal transmission method provided in the embodiment of the present application. In this case, the above steps S110 to S140 are not performed. In this case, the RF signal can be received by all antennas; and the uplink RF signal can be transmitted by the antenna with the best downlink received signal quality.

[0307] The signal transmission method provided in the embodiment of the present application has at least the following beneficial effects:

[0308] (1) By measuring the phase difference of multiple sub-signals of the downlink radio frequency signal, when transmitting the uplink radio frequency signal, the phase of the multiple sub-signals of the uplink radio frequency signal is compensated, so that the multiple sub-signals of the uplink radio frequency signal can reach the satellite 20 at the same time, thereby realizing the shaping of the uplink beam, so that the uplink beam has directionality and points to the satellite 20, thereby realizing the enhancement of the uplink radio frequency signal. In other words, the measurement of the arrival angle of the downlink radio frequency signal is realized, and the same angle is used for transmission during uplink transmission.

[0309] (2) Since the frequency deviation caused by the Doppler effect can be ignored in the calculation of the phase difference, the signal transmission method can be applied to both narrowband communication and broadband communication.

[0310] (3) The preset phase difference takes into account the phase changes caused by multiple uplinks and multiple downlinks, making the compensation of the phase difference more accurate.

[0311] (4) The electronic device 10 can be compatible with TDD and FDD. The IQ calibration and the power-on calibration of the RF integrated circuit 12 can reuse the same calibration loop. The DPD calibration loop can be reused to compensate for the phase offset caused by the aging of the RF front-end module 14, thereby reducing the impact of the aging of the RF front-end module 14 on the uplink.

[0312] (5) In order to suppress the negative benefits of phase compensation in special scenarios (when the posture of the electronic device 10 changes or the user holds the antenna), when the posture of the electronic device 10 changes, the first phase difference is recalculated and the calculation time is shortened. When the user is detected holding the antenna, on the one hand, the user can be reminded to correct the holding posture; on the other hand, the signal transmission method can be abandoned for response.

[0313] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A signal transmission method, applied to electronic equipment, characterized in that: The electronic device comprises: a baseband, a first uplink, a second uplink, a first downlink, a second downlink, a first antenna, and a second antenna; the first uplink and the first downlink are both connected between the baseband and the first antenna, and the second uplink and the second downlink are both connected between the baseband and the second antenna; The method comprises: Receiving a first radio frequency signal through the first antenna and the first downlink to obtain a first radio frequency sub-signal; and receiving the first radio frequency signal through the second antenna and the second downlink to obtain a second radio frequency sub-signal; Determine a difference between the phase of the first radio frequency sub-signal and the phase of the second radio frequency sub-signal to obtain a first phase difference; Determine the sum of the first phase difference and the preset phase difference to obtain a second phase difference; A third RF sub-signal is transmitted through the first uplink and the first antenna, and a fourth RF sub-signal is transmitted through the second uplink and the second antenna, and the difference between the phase of the fourth RF sub-signal and the phase of the third RF sub-signal is equal to the second phase difference.

2. The method according to claim 1, characterized in that The first uplink includes a first sublink and a second sublink, the first end of the first sublink is connected to the first end of the baseband, the second end of the first sublink is connected to the first end of the second sublink, and the second end of the second sublink is connected to the first antenna; The second uplink includes a third sublink and a fourth sublink, the first end of the third sublink is connected to the second end of the baseband, the second end of the third sublink is connected to the first end of the fourth sublink, and the second end of the fourth sublink is connected to the second antenna; The first downlink includes a fifth sublink and a sixth sublink, a first end of the fifth sublink is connected to the third end of the baseband, a second end of the fifth sublink is connected to the first end of the sixth sublink, and a second end of the sixth sublink is connected to the first antenna; The second downlink includes a seventh sublink and an eighth sublink, the first end of the seventh sublink is connected to the fourth end of the baseband, the second end of the seventh sublink is connected to the first end of the eighth sublink, and the second end of the eighth sublink is connected to the second antenna.

3. The method according to claim 2, characterized in that The frequency of the first radio frequency sub-signal and the frequency of the second radio frequency sub-signal are both the first frequency; the frequency of the third radio frequency sub-signal and the frequency of the fourth radio frequency sub-signal are both the second frequency; receiving a first radio frequency signal through the first antenna and the first downlink to obtain a first radio frequency sub-signal; Before receiving the first radio frequency signal through the second antenna and the second downlink to obtain the second radio frequency sub-signal, the method further includes: Calibrate the first sub-link and the third sub-link so that the first sub-link and the third sub-link generate the same phase change on the radio frequency signal of the second frequency; as well as, The fifth sub-link and the seventh sub-link are calibrated so that the phase changes generated by the fifth sub-link and the seventh sub-link on the radio frequency signal of the first frequency are the same.

4. The method according to claim 3, characterized in that receiving a first radio frequency signal through the first antenna and the first downlink to obtain a first radio frequency sub-signal; Before receiving the first radio frequency signal through the second antenna and the second downlink to obtain the second radio frequency sub-signal, the method further includes: The preset phase difference is determined.

5. The method according to claim 4, characterized in that The determining the preset phase difference comprises: receiving a third radio frequency signal through the first antenna and the first downlink to obtain a fifth radio frequency sub-signal; and receiving the third radio frequency signal through the second antenna and the second downlink to obtain a sixth radio frequency sub-signal, wherein the frequencies of the fifth radio frequency sub-signal and the sixth radio frequency sub-signal are both the first frequency, and the third radio frequency signal is transmitted by the comprehensive tester; Determine a difference between the phase of the fifth radio frequency sub-signal and the phase of the sixth radio frequency sub-signal to obtain a third phase difference; transmitting a seventh radio frequency sub-signal to the comprehensive tester through the first uplink and the first antenna, and transmitting an eighth radio frequency sub-signal to the comprehensive tester through the second uplink and the second antenna, wherein the frequency of the seventh radio frequency sub-signal and the frequency of the eighth radio frequency sub-signal are both the second frequency, and the difference between the phase of the eighth radio frequency sub-signal and the phase of the seventh radio frequency sub-signal is equal to the third phase difference; The phase of the eighth radio frequency sub-signal received by the comprehensive tester is subtracted from the phase of the seventh radio frequency sub-signal received by the comprehensive tester to obtain the preset phase difference.

6. The method according to claim 5, characterized in that The third phase difference is: in, is the phase change amount caused by the distance from the first antenna to the comprehensive tester on the fifth radio frequency sub-signal; is a phase change amount generated by the sixth sub-link and the first antenna on the fifth radio frequency sub-signal; is the phase change amount of the sixth radio frequency sub-signal caused by the distance from the comprehensive tester to the second antenna; is the phase change amount generated by the eighth sub-link and the second antenna on the sixth radio frequency sub-signal.

7. The method according to any one of claims 3 to 6, characterized in that: The preset phase difference is: in, is a phase change amount generated by the second sub-link and the first antenna on the radio frequency sub-signal of the second frequency; is a phase change amount generated by the fourth sub-link and the second antenna on the radio frequency sub-signal of the second frequency; is a phase change amount generated by the sixth sub-link and the first antenna on the radio frequency sub-signal of the first frequency; It is the phase change amount generated by the eighth sub-link and the second antenna on the radio frequency sub-signal of the first frequency.

8. The method according to any one of claims 3 to 6, characterized in that: The first phase difference is: in, is the phase change amount of the first radio frequency sub-signal caused by the distance from the satellite to the first antenna; is a phase change amount generated by the sixth sub-link and the first antenna on the first radio frequency sub-signal; is the phase change amount of the second radio frequency sub-signal caused by the distance from the satellite to the second antenna; is the phase change amount generated by the eighth sub-link and the second antenna on the second RF sub-signal.

9. The method according to claim 2, characterized in that The first sub-link and the third sub-link both include a driver amplifier, and the second sub-link and the fourth sub-link both include a cascaded filter and a power amplifier; Alternatively, the first sub-link and the third sub-link do not include a driver amplifier, and the second sub-link and the fourth sub-link both include a cascaded driver amplifier, a filter, and a power amplifier.

10. The method according to claim 2, characterized in that The fifth sub-link and the seventh sub-link both include a low noise amplifier, and the sixth sub-link and the eighth sub-link both include a cascaded filter and a low noise amplifier; Alternatively, the fifth sub-link and the seventh sub-link do not include a low noise amplifier, and the sixth sub-link and the eighth sub-link both include a cascaded filter and two low noise amplifiers.

11. The method according to claim 1, characterized in that receiving a first radio frequency signal through the first antenna and the first downlink to obtain a first radio frequency sub-signal; and receiving the first radio frequency signal through the second antenna and the second downlink to obtain a second radio frequency sub-signal, specifically including: Receiving the first RF signals through the first antenna and the first downlink to obtain a plurality of first RF sub-signals; and receiving the first RF signals through the second antenna and the second downlink to obtain a plurality of second RF sub-signals, wherein the plurality of first RF sub-signals correspond to the plurality of second RF sub-signals in one-to-one correspondence; The determining a difference between a phase of the first radio frequency sub-signal and a phase of the second radio frequency sub-signal to obtain a first phase difference specifically includes: respectively determining a difference between the phase of each of the first radio frequency sub-signals and the phase of the corresponding second radio frequency sub-signal to obtain a plurality of differences; An average value of the plurality of differences is used as the first phase difference.

12. The method according to claim 11, characterized in that The transmitting a third radio frequency sub-signal through the first uplink and the first antenna, and transmitting a fourth radio frequency sub-signal through the second uplink and the second antenna specifically includes: If a preset instruction is received, a third RF sub-signal is transmitted through the first uplink and the first antenna, and a fourth RF sub-signal is transmitted through the second uplink and the second antenna. The preset instruction is used to indicate that the posture change of the electronic device within a preset time period meets the preset conditions.

13. The method according to claim 1, characterized in that Before determining the difference between the phase of the first radio frequency sub-signal and the phase of the second radio frequency sub-signal to obtain the first phase difference, the method further includes: determining whether the user is holding the position where the first antenna is located and the position where the second antenna is located; If the user does not hold the position where the first antenna is located, and does not hold the position where the second antenna is located, a difference between the phase of the first RF sub-signal and the phase of the second RF sub-signal is determined to obtain a first phase difference.

14. An electronic device, characterized in that: The electronic device includes a baseband, a first uplink, a second uplink, a first downlink, a second downlink, a first antenna, and a second antenna; the first uplink and the first downlink are both connected between the baseband and the first antenna, and the second uplink and the second downlink are both connected between the baseband and the second antenna; The electronic device is used to execute the method according to any one of claims 1 to 13.

15. The electronic device according to claim 14, characterized in that: The first uplink includes a first sublink and a second sublink, the first end of the first sublink is connected to the first end of the baseband, the second end of the first sublink is connected to the first end of the second sublink, and the second end of the second sublink is connected to the first antenna; The second uplink includes a third sublink and a fourth sublink, the first end of the third sublink is connected to the second end of the baseband, the second end of the third sublink is connected to the first end of the fourth sublink, and the second end of the fourth sublink is connected to the second antenna; The first downlink includes a fifth sublink and a sixth sublink, a first end of the fifth sublink is connected to the third end of the baseband, a second end of the fifth sublink is connected to the first end of the sixth sublink, and a second end of the sixth sublink is connected to the first antenna; The second downlink includes a seventh sublink and an eighth sublink, the first end of the seventh sublink is connected to the fourth end of the baseband, the second end of the seventh sublink is connected to the first end of the eighth sublink, and the second end of the eighth sublink is connected to the second antenna.

16. The electronic device according to claim 15, characterized in that: The electronic device further comprises: a radio frequency integrated circuit and a radio frequency front-end module; The first sub-link, the third sub-link, the fifth sub-link, and the seventh sub-link are all integrated in the radio frequency integrated circuit; The second sub-link and the fourth sub-link both include cascaded filters and power amplifiers integrated in the RF front-end module; The sixth sub-link and the eighth sub-link both include cascaded filters and one or two low-noise amplifiers integrated in the RF front-end module.

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