Communication method and terminal equipment

Abstract

The invention provides a communication method and terminal equipment. The communication method comprises the following steps: acquiring a real-time downlink phase difference between a first downlink signal and a second downlink signal; and determining the phase compensation value corresponding to the downlink phase difference matched with the real-time downlink phase difference as a real-time phase compensation value according to the first corresponding relation. And compensating the phase difference between the first uplink signal and the second uplink signal according to the real-time phase compensation value, and transmitting the compensated signal to the wireless access equipment. Thus, the phase compensation value corresponding to the real-time phase difference is obtained by obtaining the first corresponding relation between the downlink phase difference and the corresponding phase compensation value, and then phase difference compensation is performed on the multiple paths of uplink signals, so that the phase difference of the multiple paths of uplink signals can be better controlled, and the performance of the uplink signals is improved. Therefore, the gain of the transmitting signal of the terminal equipment in the specific direction is optimal.

Description

Technical Field

[0001] The present application relates to the field of radio frequency technology, and in particular to a communication method and terminal equipment. Background Art

[0002] With the development of radio frequency technology, beamforming technology has been more widely used. Beamforming technology refers to controlling the waveform direction of the electromagnetic wave used for transmission and the radiation amplitude in that direction, so as to compensate for the signal fading and distortion introduced by factors such as space loss and multipath effect during wireless propagation, while reducing interference between users on the same channel. In a multiple input multiple output (MIMO) communication system, the communication device has at least two transmitting antennas. When beamforming technology is applied to the communication device, it is necessary to control the phase difference of the transmission signals of the two transmitting antennas, so that the gain of the transmission signal of the communication device in a specific direction is optimal. Therefore, how to control the phase difference of the transmission signals of the two transmitting antennas has become an urgent problem to be solved. Summary of the invention

[0003] In view of the above problems, the present application provides a communication method and a terminal device.

[0004] In a first aspect, the present application provides a communication method, which is applied to a terminal device, wherein the terminal device is used to generate and transmit a first uplink signal and a second uplink signal to a wireless access device, and the method includes: receiving a downlink signal from the wireless access device, and converting the downlink signal into a first downlink signal and a second downlink signal. Obtaining a real-time downlink phase difference between the first downlink signal and the second downlink signal. Obtaining a transmission inherent phase difference, wherein the transmission inherent phase difference is the difference between a first phase difference between the transmitted first uplink signal and the second uplink signal and a second phase difference between the generated first uplink signal and the second uplink signal. Obtaining a first correspondence between the downlink phase difference and the corresponding phase compensation value. According to the first correspondence, determining a phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference as a real-time phase compensation value. Compensating the phase difference between the first uplink signal and the second uplink signal according to the real-time phase compensation value and transmitting it to the wireless access device. In this way, the present application obtains the first corresponding relationship between the downlink phase difference and the corresponding phase compensation value, thereby obtaining the phase compensation value corresponding to the real-time phase difference, and then performs phase difference compensation on multiple uplink signals. This can better control the phase difference of multiple uplink signals, thereby making the gain of the terminal device's transmitted signal in a specific direction optimal.

[0005] In combination with the first aspect, in some possible implementations, the first corresponding relationship includes a first relationship between a downlink phase difference and an angle of arrival and a second relationship between the angle of arrival and a phase compensation value. According to the first corresponding relationship, the phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference is determined as the real-time phase compensation value, including: according to the first relationship, the angle of arrival corresponding to the downlink phase difference that matches the real-time downlink phase difference is determined as the real-time angle of arrival, wherein the angle of arrival is the direction angle when the downlink signal arrives at the terminal device. According to the second relationship, the phase compensation value corresponding to the angle of arrival that matches the real-time angle of arrival is determined as the real-time phase compensation value.

[0006] In combination with the first aspect, in some possible implementations, the terminal device includes a first receiving link and a second receiving link, the first receiving link is used to convert a downlink signal into a first downlink signal, and the second receiving link is used to convert a downlink signal into a second downlink signal, and the method further includes: obtaining a reception inherent phase difference, wherein the reception inherent phase difference includes a phase response difference between the first receiving link and the second receiving link. Obtain a third relationship between a preset air interface phase difference and an angle of arrival, wherein the air interface phase difference is the difference between the phase when the downlink signal arrives at the first receiving link and the phase when the downlink signal arrives at the second receiving link. The sum of each air interface phase difference and the reception inherent phase difference in the third relationship is taken as the downlink phase difference of the angle of arrival corresponding to the air interface phase difference to obtain the first relationship.

[0007] In combination with the first aspect, in some possible implementations, the method further includes: obtaining a fourth relationship between the angle of arrival and the first phase difference. Using the difference between each first phase difference and the inherent phase difference of the transmission in the fourth relationship as a phase compensation value of the angle of arrival corresponding to the first phase difference to obtain the second relationship.

[0008] In combination with the first aspect, in some possible implementations, the method further includes: receiving a plurality of test downlink signals respectively transmitted by the test device at a plurality of different locations, and converting the plurality of test downlink signals into a plurality of first test downlink signals and a plurality of corresponding second test downlink signals. Obtain a plurality of test phase differences between the plurality of first test downlink signals and the corresponding second test downlink signals. According to the first relationship, determine a plurality of arrival angles respectively corresponding to a plurality of downlink phase differences respectively matching the plurality of test phase differences. Generate a corresponding first uplink test signal and a second uplink test signal according to each arrival angle, wherein the phase difference between each first uplink test signal and the corresponding second uplink test signal is a target phase difference, and the target phase difference is used to make the signal strength received by the test device greater than the intensity threshold corresponding to the current arrival angle. Determine the target phase difference as the first phase difference corresponding to the current arrival angle. Obtain a fourth relationship according to the plurality of arrival angles and the plurality of first phase differences corresponding thereto.

[0009] In combination with the first aspect, in some possible implementations, the terminal device includes a first transmission link and a second transmission link, the first reception link includes a first reception radio frequency circuit, and the second reception link includes a second reception radio frequency circuit. The transmission inherent phase difference includes a transmission link phase difference, wherein the transmission link phase difference is a difference in phase response between the first transmission link and the second transmission link. The reception inherent phase difference includes a reception radio frequency phase difference, wherein the reception radio frequency phase difference is a difference in phase response between the first reception radio frequency circuit and the second reception radio frequency circuit.

[0010] In combination with the first aspect, in some possible implementations, the terminal device also includes a transmission link test circuit, and the method also includes: generating a first transmission link test signal and a second transmission link test signal. Receive a first transmission link feedback signal and a second transmission link feedback signal, wherein the first transmission link feedback signal is a signal after the first transmission link test signal flows through the first transmission link, the transmission link test circuit and the target receiving radio frequency circuit, and the second transmission link feedback signal is a signal after the second transmission link test signal flows through the second transmission link, the transmission link test circuit and the target receiving radio frequency circuit, and the target receiving link is the first receiving link or the second receiving link. Obtain a third phase difference between the first transmission link feedback signal and the first transmission link test signal and a fourth phase difference between the second transmission link feedback signal and the second transmission link test signal. Determine the transmission link phase difference based on the difference between the third phase difference and the fourth phase difference.

[0011] In combination with the first aspect, in some possible implementations, the terminal device also includes a receiving RF test circuit, and the method also includes: generating a receiving RF test signal. Receive a first receiving RF feedback signal and a second receiving RF feedback signal, wherein the first receiving RF feedback signal is a signal after the receiving RF test signal flows through the target transmission link, the receiving RF test circuit and the first receiving RF circuit, and the second receiving RF feedback signal is a signal after the receiving RF test signal flows through the target transmission link, the receiving RF test circuit and the second receiving RF circuit, and the target transmission link is the first transmission link or the second transmission link. Obtain a fifth phase difference between the first receiving RF feedback signal and the second receiving RF feedback signal. According to the fifth phase difference, determine the receiving RF phase difference.

[0012] In combination with the first aspect, in some possible implementations, the terminal device further includes an antenna switch circuit, the first receiving link further includes a first receiving front-end circuit, and the second receiving link further includes a second receiving front-end circuit. The transmitting inherent phase difference also includes a switch front-end phase difference, wherein the switch front-end phase difference is the difference between the phase response of the antenna switch circuit to the first uplink signal and the phase response to the second uplink signal. The receiving inherent phase difference also includes a receiving front-end phase difference, wherein the receiving front-end phase difference is the difference between the phase responses of the first receiving front-end circuit and the second receiving front-end circuit.

[0013] In combination with the first aspect, in some possible implementations, the first transmission link and the second transmission link are electrically connected to the analysis system through the antenna switch circuit, and the method also includes: generating a first transmission front-end test signal and a second transmission front-end test signal. Receive the sixth phase difference output by the analysis system, and determine the difference between the sixth phase difference and the transmission link phase difference as the switch front-end phase difference. Among them, the analysis system receives the first transmission front-end feedback signal and the second transmission front-end feedback signal, and uses the phase difference between the first transmission front-end feedback signal and the second transmission front-end feedback signal as the sixth phase difference and transmits it to the terminal device, the first transmission front-end feedback signal is the signal after the first transmission front-end test signal flows through the first transmission link and the antenna switch circuit, and the second transmission front-end feedback signal is the signal after the second transmission front-end feedback signal flows through the second transmission link and the antenna switch circuit.

[0014] In combination with the first aspect, in some possible implementations, the first receiving link and the second receiving link are electrically connected to the analysis system through the antenna switch circuit, and the method also includes: receiving a first receiving front-end feedback signal and a second receiving front-end feedback signal. Obtain the seventh phase difference between the first receiving front-end feedback signal and the second receiving front-end feedback signal. The difference between the seventh phase difference and the received RF phase difference is determined as the receiving front-end phase difference. Among them, the analysis system generates and outputs a receiving front-end test signal to the terminal device, the first receiving front-end feedback signal is a signal after the receiving front-end test signal flows through the antenna switch circuit and the first receiving link, and the second receiving front-end feedback signal is a signal after the receiving front-end test signal flows through the antenna switch circuit and the second receiving link.

[0015] In a second aspect, the present application provides a terminal device, the terminal device includes a first transmitting link, a second transmitting link, a first receiving link, a second receiving link, and a digital baseband circuit, the digital baseband circuit is electrically connected to the first transmitting link, the second transmitting link, the first receiving link, and the second receiving link, the first receiving link is used to convert a downlink signal from a wireless access device into a first downlink signal, the second receiving link is used to convert a downlink signal into a second downlink signal, the digital baseband circuit is used to generate and transmit a first uplink signal and a second uplink signal to the wireless access device, and the digital baseband circuit is used to: receive the first downlink signal and the second downlink signal. Obtain a real-time downlink phase difference between the first downlink signal and the second downlink signal. Obtain a transmission inherent phase difference, wherein the transmission inherent phase difference is the difference between the first phase difference between the transmitted first uplink signal and the second uplink signal and the second phase difference between the generated first uplink signal and the second uplink signal. Obtain a first corresponding relationship between the downlink phase difference and the phase compensation value. According to the first corresponding relationship, determine the phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference as the real-time phase compensation value. The phase difference between the first uplink signal and the second uplink signal is compensated according to the real-time phase compensation value and then transmitted to the wireless access device.

[0016] In combination with the second aspect, in some possible implementations, the first corresponding relationship includes a first relationship between a downlink phase difference and an angle of arrival and a second relationship between the angle of arrival and a phase compensation value. According to the first corresponding relationship, the phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference is determined as the real-time phase compensation value, including: the digital baseband circuit is used to: according to the first relationship, determine the angle of arrival corresponding to the downlink phase difference that matches the real-time downlink phase difference as the real-time angle of arrival, wherein the angle of arrival is the directional angle when the downlink signal arrives at the terminal device. According to the second relationship, determine the phase compensation value corresponding to the angle of arrival that matches the real-time angle of arrival as the real-time phase compensation value.

[0017] In combination with the second aspect, in some possible implementations, the digital baseband circuit is further used to: obtain a reception inherent phase difference, wherein the reception inherent phase difference includes a phase response difference between a first receiving link and a second receiving link. Obtain a third relationship between a preset air interface phase difference and an angle of arrival, wherein the air interface phase difference is a difference between a phase when a downlink signal arrives at the first receiving link and a phase when the downlink signal arrives at the second receiving link. The sum of each air interface phase difference and the reception inherent phase difference in the third relationship is used as the downlink phase difference of the angle of arrival corresponding to the air interface phase difference to obtain the first relationship.

[0018] In combination with the second aspect, in some possible implementations, the digital baseband circuit further includes: obtaining a fourth corresponding relationship between the angle of arrival and the first phase difference. The difference between each first phase difference and the inherent phase difference of transmission in the fourth corresponding relationship is used as a phase compensation value of the angle of arrival corresponding to the first phase difference to obtain the second relationship.

[0019] In combination with the second aspect, in some possible implementations, the digital baseband circuit is also used to: receive multiple test downlink signals respectively transmitted by the test equipment at multiple different locations, and convert the multiple test downlink signals into multiple first test downlink signals and corresponding multiple second test downlink signals. Obtain multiple test phase differences between the multiple first test downlink signals and the corresponding second test downlink signals. According to the first relationship, determine the multiple arrival angles respectively corresponding to the multiple downlink phase differences that match the multiple test phase differences. Generate a corresponding first uplink test signal and a second uplink test signal according to each arrival angle, wherein the phase difference between each first uplink test signal and the corresponding second uplink test signal is a target phase difference, and the target phase difference is used to make the signal strength received by the test equipment greater than the intensity threshold corresponding to the current arrival angle. Determine the target phase difference as the first phase difference corresponding to the current arrival angle. According to the multiple arrival angles and their corresponding multiple first phase differences, obtain the third relationship.

[0020] In conjunction with the second aspect, in some possible implementations, the first receiving link includes a first receiving radio frequency circuit, and the second receiving link includes a second receiving radio frequency circuit. The transmitting inherent phase difference includes a transmitting link phase difference, wherein the transmitting link phase difference is a difference in phase response between the first transmitting link and the second transmitting link. The receiving inherent phase difference includes a receiving radio frequency phase difference, wherein the receiving radio frequency phase difference is a difference in phase response between the first receiving radio frequency circuit and the second receiving radio frequency circuit.

[0021] In combination with the second aspect, in some possible implementations, the terminal device also includes a transmission link test circuit, and the digital baseband circuit is also used to: generate a first transmission link test signal and a second transmission link test signal. Receive a first transmission link feedback signal and a second transmission link feedback signal, wherein the first transmission link feedback signal is a signal after the first transmission link test signal flows through the first transmission link, the transmission link test circuit and the target receiving radio frequency circuit, and the second transmission link feedback signal is a signal after the second transmission link test signal flows through the second transmission link, the transmission link test circuit and the target receiving radio frequency circuit, and the target receiving link is the first receiving link or the second receiving link. Obtain a third phase difference between the first transmission link feedback signal and the first transmission link test signal and a fourth phase difference between the second transmission link feedback signal and the second transmission link test signal. Determine the transmission link phase difference based on the difference between the third phase difference and the fourth phase difference.

[0022] In conjunction with the second aspect, in some possible implementations, the transmission link test circuit includes a first coupler, a second coupler, and a first transmission link test switch. The first end of the first coupler is coupled to the output end of the first transmission link, and the first end of the second coupler is coupled to the output end of the second transmission link. The second ends of the first coupler and the second coupler are both electrically connected to the static contact of the first transmission link test switch, and the moving contact of the first transmission link test switch is electrically connected to the target receiving link.

[0023] In combination with the second aspect, in some possible implementations, the terminal device also includes a receiving RF test circuit, and the digital baseband circuit is also used to: generate a receiving RF test signal. Receive a first receiving RF feedback signal and a second receiving RF feedback signal, wherein the first receiving RF feedback signal is a signal after the receiving RF test signal flows through the target transmission link, the receiving RF test circuit and the first receiving RF circuit, and the second receiving RF feedback signal is a signal after the receiving RF test signal flows through the target transmission link, the receiving RF test circuit and the second receiving RF circuit, and the target transmission link is the first transmission link or the second transmission link. Obtain the fifth phase difference between the first receiving RF feedback signal and the second receiving RF feedback signal. According to the fifth phase difference, determine the receiving RF phase difference.

[0024] In combination with the second aspect, in some possible implementations, the first receiving RF circuit and the second receiving RF circuit both include a first-band low-noise amplifier and a second-band low-noise amplifier, and the receiving RF test circuit includes a fifth coupler, a power divider, a first receiving RF test switch, a second receiving RF test switch, a third receiving RF test switch, and a fourth receiving RF test switch. The first end of the fifth coupler is coupled to the target transmission link, the second end of the fifth coupler is electrically connected to the input end of the power divider, and the output end of the power divider is electrically connected to the static contacts of the first receiving RF test switch, the second receiving RF test switch, the third receiving RF test switch, and the fourth receiving RF test switch. The moving contacts of the first receiving RF test switch, the second receiving RF test switch, the third receiving RF test switch, and the fourth receiving RF test switch are electrically connected to the input end of the first-band low-noise amplifier of the first receiving RF circuit, the input end of the second-band low-noise amplifier of the first receiving RF circuit, the input end of the first-band low-noise amplifier of the second receiving RF circuit, and the input end of the second-band low-noise amplifier of the second receiving RF circuit, respectively.

[0025] In conjunction with the second aspect, in some possible implementations, the terminal device further includes an antenna switch circuit, the first receiving link further includes a first receiving front-end circuit, and the second receiving link further includes a second receiving front-end circuit. The transmitting inherent phase difference also includes a switch front-end phase difference, wherein the switch front-end phase difference is the difference between the phase response of the antenna switch circuit to the first uplink signal and the phase response to the second uplink signal. The receiving inherent phase difference also includes a receiving front-end phase difference, wherein the receiving front-end phase difference is the difference in phase response between the first receiving front-end circuit and the second receiving front-end circuit.

[0026] In combination with the second aspect, in some possible implementations, the first transmission link and the second transmission link are electrically connected to the analysis system through the antenna switch circuit, and the digital baseband circuit is also used to: generate a first transmission front-end test signal and a second transmission front-end test signal. Receive the sixth phase difference output by the analysis system, and determine the difference between the sixth phase difference and the transmission link phase difference as the switch front-end phase difference. Among them, the analysis system receives the first transmission front-end feedback signal and the second transmission front-end feedback signal, and uses the phase difference between the first transmission front-end feedback signal and the second transmission front-end feedback signal as the sixth phase difference and transmits it to the terminal device. The first transmission front-end feedback signal is the signal after the first transmission front-end test signal flows through the first transmission link and the antenna switch circuit, and the second transmission front-end feedback signal is the signal after the second transmission front-end feedback signal flows through the second transmission link and the antenna switch circuit.

[0027] In combination with the second aspect, in some possible implementations, the first receiving link and the second receiving link are electrically connected to the analysis system through the antenna switch circuit, and the digital baseband circuit also includes: receiving a first receiving front-end feedback signal and a second receiving front-end feedback signal. Obtain the seventh phase difference between the first receiving front-end feedback signal and the second receiving front-end feedback signal. The difference between the seventh phase difference and the received RF phase difference is determined as the receiving front-end phase difference. Among them, the analysis system generates and outputs a receiving front-end test signal to the terminal device, the first receiving front-end feedback signal is a signal after the receiving front-end test signal flows through the antenna switch circuit and the first receiving link, and the second receiving front-end feedback signal is a signal after the receiving front-end test signal flows through the antenna switch circuit and the second receiving link. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a wireless communication system provided in the present application.

[0029] Figure 2 An application scenario diagram of the wireless communication system provided in this application.

[0030] Figure 3 Another application scenario diagram of the wireless communication system provided in this application.

[0031] Figure 4 A schematic diagram of a terminal device provided for this application.

[0032] Figure 5 Circuit diagram of the terminal device provided for this application.

[0033] Figure 6 Further circuit diagram of the terminal device provided for this application.

[0034] Figure 7 Further circuit diagram of the terminal device provided for this application.

[0035] Figure 8 A schematic diagram of the connection between the terminal device and the analysis device provided in this application.

[0036] Fig. 9 A schematic diagram of communication between a terminal device and a test device provided in this application.

[0037] Figures 10 to 19 A flow chart of the communication method provided by the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application.

[0039] It is understandable that the connection relationship described in this application refers to direct or indirect connection. For example, the connection between A and B can be either a direct connection between A and B or an indirect connection between A and B through one or more other electrical components. For example, A and C can be directly connected, and C and B can be directly connected, so that A and B are connected through C. It is also understandable that the "A connects B" described in this application can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0040] 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 way to describe 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.

[0041] In the description of this application, words such as "first" and "second" are only used to distinguish different objects, and do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit differences. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0042] See also Figure 1 , Figure 1This is a schematic diagram of a wireless communication system 10 provided in the present application. The wireless communication system 10 includes a terminal device 11 and a wireless access device 12, and the terminal device 11 and the wireless access device 12 can perform wireless communication.

[0043] The terminal device 11 includes at least two antennas. For example, antenna ANT1 and antenna ANT2. Antenna ANT1 and antenna ANT2 can both be used to transmit uplink signals to the wireless access device 12, that is, as transmitting antennas, or antenna ANT1 and antenna ANT2 can both be used to transmit downlink signals from the wireless access device 12, that is, as receiving antennas.

[0044] In some embodiments, the terminal device 11 may be a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc. The UE may include a mobile phone, a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a point of sales (POS) machine, a personal digital assistant (F1A), a wearable device, a virtual reality device, a wireless USB flash drive, a Bluetooth speaker / headphone, or a mobile or fixed terminal with an antenna, such as a vehicle-mounted front-end device, a driving recorder, a security device, etc.

[0045] In some embodiments, the wireless access device 12 can be a communication satellite, a navigation satellite, a low-orbit satellite, a network side NodeB, an evolved network side eNodeB, the network side in a 5G mobile communication system, the network side in a future mobile communication system, or an access node in a WiFi system, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.

[0046] See also Figure 2 , Figure 2 An application scenario diagram of the wireless communication system 10 provided in the present application. The following description is made by taking the application of the wireless communication system 10 in a satellite communication scenario as an example, but the present application does not impose any limitation on the application scenario of the wireless communication system 10. In the present embodiment, the wireless communication system 10 further includes a satellite ground station 13 and a base station 14, the wireless access device is a communication satellite 121, and the terminal devices are terminal devices 111 and 112.

[0047] The communication satellite 121 is used to establish a wireless communication connection with the terminal device 111 and the satellite ground station 13. The satellite ground station 13 can establish a wired, wireless or other forms of communication connection with the base station 14, and the base station 14 can establish a wireless communication connection with the terminal device 112.

[0048] When the terminal device 111 is not in the coverage of the cellular network, and the terminal device 112 is in the coverage of the cellular network, the terminal device 111 can communicate with the terminal device 112 based on the communication satellite 121, the satellite ground station 13 and the base station 14. Specifically, when the terminal device 111 needs to communicate with the terminal device 112, the terminal device 111 can send communication data, such as paging messages, target information, call data, etc., to the communication satellite 121, and the communication data can carry the device identification of the terminal device 112. Among them, the device identification can be used to identify the device, such as the number of the subscriber identity module (SIM) card of the device. The communication satellite 121 can send the communication data to the satellite ground station 13, and the satellite ground station 13 can send the communication data to the base station 14, and the base station 14 sends the communication data to the terminal device 112.

[0049] The terminal device 112 may also send communication data to the terminal device 111 along the communication path in the reverse direction. Taking the case where the terminal device 112 initiates a call request to the terminal device 111 as an example, the terminal device 112 may send a paging message carrying the device identification of the terminal device 111 to the base station 14. The base station 14 may forward the paging message to the satellite ground station 13. The satellite ground station 13 may send the received paging message to the communication satellite 121. The communication satellite 121 may send the paging message to the terminal device 111. In this way, based on the communication satellite 121, the satellite ground station 13 and the base station 14, the terminal device 111 and the terminal device 112 may communicate with each other.

[0050] See also Figure 3 , Figure 3 Another application scenario diagram of the wireless communication system 10 provided in the present application. In this embodiment, the access device is a communication satellite 121, and the terminal devices are terminal devices 111 and 112. The communication satellite 121 is used to establish a wireless communication connection with the terminal device 111 and / or the terminal device 112.

[0051] When both the terminal device 111 and the terminal device 112 are not in the coverage of the cellular network, the terminal device 111 can communicate with the terminal device 112 based on the communication satellite 121. Specifically, when the terminal device 111 needs to communicate with the terminal device 112, the terminal device 111 can send communication data to the communication satellite 121, and the communication data can carry the device identification of the terminal device 112. The communication satellite 121 can send the communication data to the terminal device 112.

[0052] The terminal device 112 may also send communication data to the terminal device 111 along the communication path in the reverse direction. Taking the case where the terminal device 112 initiates a call request to the terminal device 111 as an example, the terminal device 112 may send a paging message carrying the device identification of the terminal device 111 to the communication satellite 121. The communication satellite 121 may send the paging message to the terminal device 111. In this way, based on the communication satellite 121, the terminal devices 111 and 112 may communicate with each other.

[0053] Depend on Figure 2 and Figure 3 It can be seen that if the terminal device 111 needs to initiate a satellite call request to the terminal device 112, the terminal device 111 needs to transmit the communication data to the communication satellite 121 through the uplink signal. Since the distance between the terminal device 111 and the communication satellite 121 is too far, and the transmission power of the terminal device 111 is relatively limited, the terminal device 111 needs to perform beamforming on the uplink signal, and then needs to control multiple transmitting antennas, for example, the phase difference of the transmitted signals of the antenna ANT1 and the antenna ANT2, so that the terminal device 111 can achieve the best benefit in the direction of the communication satellite 121. Specifically, the transmission direction of the beam is determined by the phase difference when the antenna ANT1 and the antenna ANT2 transmit signals. By adjusting the phase difference of the signals transmitted by the antenna ANT1 and the antenna ANT2, the direction of the beam can be controlled.

[0054] Specifically, see Figure 4 , Figure 4It is a schematic diagram of a terminal device 111. The terminal device 111 includes a digital baseband circuit 1101, a transmission chain group, a receiving chain group, an antenna switch circuit 1106, and an antenna array. Among them, the transmission chain group includes at least two transmission chains, and the transmission chain group includes a first transmission chain 1102 and a second transmission chain 1103 as an example for explanation, but the present application does not impose any limitation on the number of transmission chains included in the transmission chain group. Similarly, the receiving chain group includes at least two receiving chains, and the receiving chain group includes a first receiving chain 1104 and a second receiving chain 1105 as an example for explanation, but the present application does not impose any limitation on the number of receiving chains included in the receiving chain group. The antenna array includes at least four antennas, and the antenna array includes a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, and a fourth antenna ANT4 as an example for explanation, but the present application does not impose any limitation on the number of antennas included in the antenna array.

[0055] The first transmit chain 1102 includes a first transmit front-end circuit 1102a and a first transmit RF circuit 1102b. The first transmit front-end circuit 1102a is electrically connected between the antenna switch circuit 1106 and the first transmit RF circuit 1102b. The first transmit RF circuit 1102b is electrically connected to the digital baseband circuit 1101.

[0056] The second transmit chain 1103 includes a second transmit front-end circuit 1103a and a second transmit RF circuit 1103b. The second transmit front-end circuit 1103a is electrically connected between the antenna switch circuit 1106 and the second transmit RF circuit 1103b. The second transmit RF circuit 1103b is electrically connected to the digital baseband circuit 1101.

[0057] The first receiving chain 1104 includes a first receiving front-end circuit 1104a and a first receiving RF circuit 1104b. The first receiving front-end circuit 1104a is electrically connected between the antenna switch circuit 1106 and the first receiving RF circuit 1104b. The first receiving RF circuit 1104b is electrically connected to the digital baseband circuit 1101.

[0058] The second receiving chain 1105 includes a second receiving front-end circuit 1105a and a second receiving RF circuit 1105b. The second receiving front-end circuit 1105a is electrically connected between the antenna switch circuit 1106 and the second receiving RF circuit 1105b. The second receiving RF circuit 1105b is electrically connected to the digital baseband circuit 1101.

[0059] The first antenna ANT1 and the second antenna ANT2 are both selectively electrically connected to the first transmitting front-end circuit 1102 a or the first receiving front-end circuit 1104 a through the antenna switch circuit 1106 .

[0060] The third antenna ANT3 and the fourth antenna ANT4 are both selectively electrically connected to the second transmitting front-end circuit 1103 a or the second receiving front-end circuit 1105 a through the antenna switch circuit 1106 .

[0061] When the terminal device 111 works in the transmission mode, the digital baseband circuit 1101 is used to generate a digital baseband signal and transmit the digital baseband signal to the first transmission radio frequency circuit 1102b and / or the second transmission radio frequency circuit 1103b. The digital baseband signal includes a first uplink signal and a second uplink signal. The digital baseband circuit 1101 can transmit the first uplink signal.

[0062] The digital baseband circuit 1101 can receive information such as text, audio, image, video, etc. through an input interface, and generate a digital baseband signal carrying the above information. For example, the digital baseband circuit 1101 receives text information through a text input device or component such as a keyboard or a touchpad, receives audio information through an audio input device or component such as a microphone, and receives image information through an image input device or component such as a camera. For another example, the digital baseband circuit 1101 can also obtain information such as text, audio, image, video, etc. from other processors. This application does not impose any restrictions on the source and method of obtaining the information carried by the digital baseband signal generated by the digital baseband circuit 1101.

[0063] The first transmit RF circuit 1102b and the second transmit RF circuit 1103b are used to perform transmit RF signal processing on the first uplink signal and / or the second uplink signal, and transmit them to the corresponding transmit front-end circuit. Among them, the digital baseband signal includes the first uplink signal and the second uplink signal. The digital baseband circuit 1101 can transmit the first uplink signal to the first transmit RF circuit 1102b and transmit the second uplink signal to the second transmit RF circuit 1103b. Transmit RF signal processing may include digital-to-analog conversion, drive amplification, up-conversion, filtering, etc. The first transmit front-end circuit 1102a and the second transmit front-end circuit 1103a are used to perform transmit front-end signal processing on the signal after the transmit RF signal processing, and transmit it to the corresponding antenna through the antenna switch circuit 1106. Among them, the transmit front-end signal processing may include filtering, power amplification, etc.

[0064] The antenna switch circuit 1106 is used to conduct the electrical connection between the first transmit front-end circuit 1102a and the antenna, and / or the electrical connection between the second transmit front-end circuit 1103a and the antenna. In this way, one or more antennas can radiate signals.

[0065] When the terminal device 111 is operating in the receiving mode, the antenna switch circuit 1106 is used to conduct the electrical connection between the first receiving front-end circuit and the antenna, and / or the electrical connection between the second receiving front-end circuit and the antenna. In this way, one or more antennas can receive downlink signals from other terminal devices or wireless access devices, etc., and convert them into two downlink components through the antenna switch circuit 1106, and transmit them to the first receiving front-end circuit 1104a and the second receiving front-end circuit 1105a respectively.

[0066] The first receiving front-end circuit 1104a and the second receiving front-end circuit 1105a are used to perform receiving front-end signal processing on the downlink signal and transmit it to the corresponding receiving RF circuit. The receiving front-end signal processing may include low noise amplification, filtering, etc.

[0067] The first receiving RF circuit 1104b and the second receiving RF circuit 1105b are used to perform receiving RF signal processing on the signal after receiving the front-end signal processing, so as to obtain the first downlink signal and the second downlink signal respectively, and transmit the first downlink signal and the second downlink signal to the digital baseband circuit 1101. The receiving RF signal processing may include low noise amplification, down conversion, transimpedance amplification, low pass filtering, analog-to-digital conversion, etc.

[0068] The digital baseband circuit 1101 is used to receive a first received baseband signal and / or a second received baseband signal, and perform baseband signal processing on the first received baseband signal and / or the second received baseband signal to obtain text, audio, image, video and other information carried by the first received baseband signal and / or the second received baseband signal.

[0069] See also Figure 5 , Figure 5 This is a circuit diagram of the terminal device 111 provided in this application.

[0070] In this embodiment, the first transmitting RF circuit 1102b, the second transmitting RF circuit 1103b, the first receiving RF circuit 1104b, and the second receiving RF circuit 1105b are all integrated on a radio frequency chip (RFIC). The RFIC also includes a transmitting port Tx1_1, a transmitting port Tx1_2, a transmitting port Tx2_1, a transmitting port Tx2_2, a receiving port Rx1_1, a receiving port Rx1_2, a receiving port Rx2_1, a receiving port Rx2_2, and a control port Cx.

[0071] The first transmitting front-end circuit 1102a includes a first band transmitting circuit Tx1_P1 and a second band transmitting circuit Tx1_P2. The first band transmitting circuit Tx1_P1 and the second band transmitting circuit Tx1_P2 each include a power amplifier and a filter electrically connected in sequence. The first transmitting RF circuit 1102b includes a first transmitting RF switch 1102b_5, a driving amplifier 1102b_1, an up-conversion circuit 1102b_2, a low-pass filter 1102b_3 and a digital-to-analog converter 1102b_4 electrically connected in sequence. The digital-to-analog converter 1102b_4 is electrically connected to the digital baseband circuit 1101. The first transmitting RF switch 1102b_5 is a single pole double throw (SF1T) switch, and two static contacts of the first transmitting RF switch 1102b_5 are respectively electrically connected to the filter of the first band transmitting circuit Tx1_P1 and the filter of the second band transmitting circuit Tx1_P2 through the transmitting port Tx1_1 and the transmitting port Tx1_2. The moving contact of the first transmitting RF switch 1102b_5 is electrically connected to the driving amplifier 1102b_1.

[0072] The second transmitting front-end circuit 1103a includes a first band transmitting circuit Tx2_P1 and a second band transmitting circuit Tx2_P2. The first band transmitting circuit Tx2_P1 and the second band transmitting circuit Tx2_P2 both include a power amplifier and a filter electrically connected in sequence. The second transmitting radio frequency circuit 1103b includes a second transmitting radio frequency switch 1103b_5, a driving amplifier 1103b_1, an up-conversion circuit 1102b_2, a low-pass filter 1103b_3 and a digital-to-analog converter 1103b_4 electrically connected in sequence. The digital-to-analog converter 1103b_4 is electrically connected to the digital baseband circuit 1101. Among them, the second transmitting radio frequency switch 1103b_5 is an SF1T switch, and the two static contacts of the second transmitting radio frequency switch 1103b_5 are respectively distributed through the transmitting port Tx2_1 and the transmitting port Tx2_2 to correspond to the filters electrically connected to the first band transmitting circuit Tx2_P1 and the second band transmitting circuit Tx2_P2. The moving contact of the second transmitting RF switch 1103b_5 is electrically connected to the driving amplifier 1103b_1.

[0073] In some embodiments, the up-conversion circuits in the first transmit RF circuit 1102b and the second transmit RF circuit 1103b may be the same up-conversion circuit, that is, the first transmit RF circuit 1102b and the second transmit RF circuit 1103b share a common up-conversion circuit 1102b_2, wherein the up-conversion circuit 1102b_2 includes a mixer 1102b_6, a frequency divider 1102b_7, and a local oscillator circuit 1102b_8.

[0074] The first receiving front-end circuit 1104a includes a first band receiving circuit Rx1_P1 and a second band receiving circuit Rx1_P2. The first band receiving circuit Rx1_P1 and the second band receiving circuit Rx1_P2 both include a low noise amplifier and a filter electrically connected in sequence. The first receiving radio frequency circuit 1104b includes two attenuators corresponding to the receiving port Rx1_1 and the receiving port Rx1_2, respectively, and two low noise amplifiers connected to the receiving port, respectively, a first receiving switch 1104b_5, a down-conversion circuit 1104b_6, a transimpedance amplifier 1104b_7, a low-pass filter 1104b_8, and an analog-to-digital converter 1104b_9. The analog-to-digital converter 1104b_9 is electrically connected to the digital baseband circuit 1101. The first receiving switch 1104b_5 is a SF1T switch, two static contacts of the first receiving switch 1104b_5 are electrically connected to the low noise amplifier 1104b_3 and the low noise amplifier 1104b_4 respectively, and a moving contact of the first receiving switch 1104b_5 is electrically connected to the down-conversion circuit 1104b_6.

[0075] The second receiving front-end circuit 1105a includes a first band receiving circuit Rx2_P1 and a second band receiving circuit Rx2_P2. The first band receiving circuit Rx2_P1 and the second band receiving circuit Rx2_P2 both include a low noise amplifier and a filter electrically connected in sequence. The second receiving radio frequency circuit 1105b includes two attenuators corresponding to the receiving port Rx2_1 and the receiving port Rx2_2, respectively, and two low noise amplifiers connected to the receiving port, a second receiving switch 1105b_5, a down-conversion circuit 1104b_6, a transimpedance amplifier 1105b_7, a low-pass filter 1105b_8, and an analog-to-digital converter 1105b_9. The output end of the analog-to-digital converter 1105b_9 is electrically connected to the digital baseband circuit 1101. The second receiving switch 1105b_5 is a SF1T switch, the two static contacts of the second receiving switch 1105b_5 are electrically connected to the low noise amplifier 1105b_3 and the low noise amplifier 1105b_4 respectively, and the moving contact of the second receiving switch 1105b_5 is electrically connected to the down-conversion circuit 1104b_6. The low noise amplifiers corresponding to the receiving ports Rx1_1 and Rx2_1 are first-band low noise amplifiers, and the low noise amplifiers corresponding to the receiving ports Rx1_2 and Rx2_2 are second-band low noise amplifiers.

[0076] In some embodiments, the down-conversion circuits in the first receiving RF circuit 1104b and the second receiving RF circuit 1105b may be the same down-conversion circuit, that is, the first receiving RF circuit 1104b and the second receiving RF circuit 1105b share a down-conversion circuit 1104b_6. The down-conversion circuit 1104b_6 includes a mixer 1104b_10, a frequency divider 1104b_11, and a local oscillator circuit 1104b_12.

[0077] The antenna switch circuit 1106 includes an antenna switch S1, an antenna switch S2, an antenna switch S3, and an antenna switch S4. The antenna switches S1, S2, S3, and S4 are all single-pole double-throw switches. The two moving contacts of the antenna switch S1 are electrically connected to the power amplifier of the second-band transmitting circuit Tx1_P2 and the low-noise amplifier of the second-band receiving circuit Rx1_P2. The static contact of the antenna switch S1 is electrically connected to the antenna ANT1. The two moving contacts of the antenna switch S2 are electrically connected to the power amplifier of the first-band transmitting circuit Tx1_P1 and the low-noise amplifier of the first-band receiving circuit Rx1_P1. The static contact of the antenna switch S2 is electrically connected to the antenna ANT2. The two moving contacts of the antenna switch S3 are electrically connected to the power amplifier of the first-band transmitting circuit Tx2_P1 and the low-noise amplifier of the first-band receiving circuit Rx2_P1. The static contact of the antenna switch S3 is electrically connected to the antenna ANT3. The two moving contacts of the antenna switch S4 are electrically connected to the power amplifier of the second band transmitting circuit Tx2_P2 and the low noise amplifier of the second band receiving circuit Rx2_P2 respectively. The stationary contact of the antenna switch S4 is electrically connected to the antenna ANT4.

[0078] In some embodiments, the two attenuators and the corresponding electrically connected low noise amplifiers in the first receiving RF circuit 1104b may be omitted.

[0079] In some embodiments, the first band transmitting circuit Tx1_P1 is used to perform transmitting front-end signal processing on a first uplink signal having a first band frequency, and the second band transmitting circuit Tx1_P2 is used to perform transmitting front-end signal processing on an uplink signal having a second band frequency. The first band may be an L band, and the corresponding first band frequency is 1 GHz-2 GHz. The second band may be an S band, and the corresponding second band frequency is 2 GHz-4 GHz.

[0080] In some embodiments, the digital baseband circuit 1101 is also used to output a transmission gain control signal to the gain control end of the low-pass filter 1102b_3, the low-pass filter 1103b_3, the driver amplifier 1102b_1, and the driver amplifier 1103b_1 through the control port Cx, and the transmission gain control signal is used to indicate the filtering gain of the low-pass filter 1102b_3, the low-pass filter 1103b_3 and / or the driving amplification gain of the driver amplifier 1102b_1, and the driver amplifier 1103b_1, for example, the digital filtering gain and / or analog filtering gain of the low-pass filter 1102b_3, the low-pass filter 1103b_3, and the digital driving gain and / or analog driving gain of the driver amplifier 1102b_1, and the driver amplifier 1103b_1.

[0081] In some embodiments, the first band receiving circuit Rx2_P1 is used to perform receiving front-end signal processing on a second wireless receiving signal having a first band frequency. The second band receiving circuit Rx2_P2 is used to perform receiving front-end signal processing on a second wireless receiving signal having a second band frequency.

[0082] The communication principle between the terminal device 111 and the communication satellite 121 is explained below.

[0083] The digital baseband circuit 1101 can receive the first downlink signal and the second downlink signal. In addition, the digital baseband circuit 1101 can also generate and transmit the first uplink signal and the second uplink signal to the communication satellite 121. Specifically, the first receiving link 1104 is used to convert the downlink signal from the communication satellite 121 into the first downlink signal, and the second receiving link 1105 is used to convert the downlink signal into the second downlink signal.

[0084] The digital baseband circuit 1101 can obtain the real-time downlink phase difference between the first downlink signal and the second downlink signal, the transmission inherent phase difference, and the first corresponding relationship between the downlink phase difference and the phase compensation value. The transmission inherent phase difference is the difference between the first phase difference between the transmitted first uplink signal and the second uplink signal and the second phase difference between the generated first uplink signal and the second uplink signal.

[0085] The digital baseband circuit 1101 may determine, according to the first corresponding relationship, a phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference as the real-time phase compensation value.

[0086] The digital baseband circuit 1101 may compensate for the phase difference between the first uplink signal and the second uplink signal according to the real-time phase compensation value and then transmit the compensated phase difference to the wireless access device 12 .

[0087] In this way, the terminal device 111 can determine the real-time phase compensation value according to the real-time downlink phase difference between the first downlink signal and the second downlink signal, and perform phase difference compensation on the first uplink signal and the second uplink signal, so as to optimize the communication benefit of the terminal device 111 in the direction of the communication satellite 121.

[0088] The following describes the working principle of the digital baseband circuit 1101 to obtain the inherent phase difference of the transmission. Figure 6 , Figure 6 A further circuit diagram of the terminal device 111 provided in the present application. The terminal device 111 also includes a transmission link test circuit. The transmission link test circuit includes a coupler CP1, a coupler CP2, a coupler CP3, a coupler CP4, a transmission link test switch TF1, and a transmission link test switch TF2. Among them, the transmission link test switch TF1 and the transmission link test switch TF2 are both SF1T switches. Coupler CP1 and coupler CP3 are first couplers, and coupler CP2 and coupler CP4 are second couplers.

[0089] The coupler CP1 is coupled to the output end of the power amplifier of the first band transmitting circuit Tx1_P1, and the coupler CP1 is electrically connected to one of the static contacts of the transmitting link test switch TF1. The other static contact of the transmitting link test switch TF1 is electrically connected to the filter of the first band receiving circuit Rx1_P1, and the moving contact of the transmitting link test switch TF1 is electrically connected to the receiving port Rx1_1.

[0090] The coupler CP2 is coupled to the output end of the power amplifier of the second band transmitting circuit Tx1_P2, and the coupler CP2 is electrically connected to one of the static contacts of the transmitting link test switch TF2. Another static contact of the transmitting link test switch TF2 is electrically connected to the filter of the second band receiving circuit Rx1_P2, and the moving contact of the transmitting link test switch TF1 is electrically connected to the receiving port Rx1_2.

[0091] The coupler CP3 is coupled to the output end of the power amplifier of the first band transmitting circuit Tx2_P1 , and the coupler CP3 is electrically connected to one of the static contacts of the transmitting link test switch TF1 and one end of the coupler CP1 .

[0092] The coupler CP4 is coupled to the output end of the power amplifier of the second band transmitting circuit Tx1_P2 , and the coupler CP4 is electrically connected to one of the static contacts of the transmitting link test switch TF2 and one end of the coupler CP2 .

[0093] The receiving link to which the moving contact of the transmitting link test switch TF1 and the moving contact of the transmitting link test switch TF2 are electrically connected is the target receiving link. In this embodiment, the first receiving link 1104 is the target receiving link. In other embodiments, the target receiving link may also be the second receiving link. That is, the moving contact of the transmitting link test switch TF1 and the moving contact of the transmitting link test switch TF2 may also be connected to the receiving port Rx2_1 and the receiving port Rx2_2, respectively.

[0094] In some embodiments, whether the attenuator is set can be determined based on the signal amplitude of the first transmission link test signal and the second transmission link test signal. For example, when the signal amplitude of the first transmission link test signal and the second transmission link test signal is small, the first band attenuator 1104b_1 and the attenuator 1104b_2 can be omitted. Similarly, when the target receiving link is the second receiving link 1105, whether the attenuator 1105b_1 and the attenuator 1105b_2 are set can also be determined based on the signal amplitude of the first transmission link test signal and the second transmission link test signal.

[0095] In this embodiment, the transmission inherent phase difference includes a transmission link phase difference. The transmission link phase difference includes a difference in phase response between the first transmission link 1102 and the second transmission link 1103. The phase response can characterize the phase delay effect of the corresponding transmission link on the signal.

[0096] When the digital baseband circuit 1101 obtains the transmission link phase difference, it generates a first transmission link test signal and a second transmission link test signal, and transmits them to the first transmission link 1102 and the second transmission link 1103 respectively. The frequencies of the first transmission link test signal and the second transmission link test signal are the first transmission link test frequency ft1 and the second transmission link test frequency ft2 respectively, and the first transmission link test signal and the second transmission link test signal are both single-tone signals, and have the same amplitude Pt and the same phase Pht when generated, that is, the amplitude difference and the phase shift phase difference of the first transmission link test signal and the second transmission link test signal are both zero.

[0097] In some embodiments, the digital baseband circuit 1101 can control the local oscillator circuit 1102b_8 and the local oscillator circuit 1104b_12 to operate at the uplink frequency, thereby ensuring that the frequencies of the first transmission link test signal and the second transmission link test signal conform to the frequency band of the uplink signal and can be correctly modulated and demodulated.

[0098] In some embodiments, the digital baseband circuit 1101 can control the static contacts of the first transmitting RF switch 1102b_5 and the second transmitting RF switch 1103b_5 to be turned on according to the frequency bands of the first uplink signal and the second uplink signal. For example, when the frequency band of the first uplink signal is the S band, the first transmitting RF switch 1102b_5 turns on the static contact connected to the transmitting port Tx1_2. For another example, when the frequency band of the second uplink signal is the L band, the second transmitting RF switch 1103b_5 turns on the static contact electrically connected to the transmitting port Tx2_1. Here, the frequency bands of the first uplink signal and the second uplink signal are both the L band as an example for explanation.

[0099] The first transmission link test signal flows through the first transmission link 1102, the coupler CP1, and the first receiving link 1104, and is converted into a first transmission link feedback signal and is output to the digital baseband circuit 1101. The second transmission link test signal flows through the second transmission link 1103, the coupler CP3, and the first receiving link 1104, and is converted into a second transmission link feedback signal and is output to the digital baseband circuit 1101.

[0100] The digital baseband circuit 1101 can distinguish the first transmission link feedback signal and the second transmission link feedback signal according to the signal frequency. For example, the digital baseband circuit 1101 can use the received signal with a frequency of ft1 as the first transmission link feedback signal, and use the received signal with a frequency of ft2 as the second transmission link feedback signal.

[0101] The digital baseband circuit 1101 obtains the amplitude P1 and the phase Ph1 of the first transmission link feedback signal, and obtains the amplitude P2 and the phase Ph2 of the second transmission link feedback signal.

[0102] The digital baseband circuit 1101 determines the transmission link phase difference as the difference between Ph1h and Ph and Ph2h according to the difference between Ph1 and Ph and the difference between Ph2 and Ph, Ph2h, wherein Ph1h is the third phase difference and Ph2h is the fourth phase difference.

[0103] In some embodiments, since the frequencies of the first transmission link test signal and the second transmission link test signal are different, the transmission link phase difference may vary with the specific values ​​of ft1 and ft2. Therefore, the digital baseband circuit 1101 can convert the obtained transmission link phase difference into a co-frequency phase difference to reduce the influence of the different frequencies of the first transmission link test signal and the second transmission link test signal on the calculation accuracy of the transmission link phase difference.

[0104] In some embodiments, since the first transmission link test signal and the second transmission link test signal flow through the transmission link test circuit, the phase response of the transmission link test circuit will also affect the calculated transmission link phase difference. Among them, the phase response of the transmission link test circuit includes the phase change introduced by one or more of the coupler CP1, the coupler CP2, the coupler CP3, the coupler CP4, the transmission link test switch TF1 and the transmission link test switch TF2, and the circuit routing. Therefore, the digital baseband circuit 1101 can subtract the phase difference corresponding to the phase response of the transmission link test circuit from the obtained transmission link phase difference, thereby improving the calculation accuracy of the transmission link phase difference.

[0105] The digital baseband circuit 1101 determines the link with smaller transmission power between the first transmission link 1102 and the second transmission link 1103 as the target increase link according to the comparison result of P1 and P2. For example, when P1 is greater than P2, the second transmission link 1103 is the link with smaller transmission power, and when P1 is less than P2, the first transmission link 1102 is the link with smaller transmission power.

[0106] The digital baseband circuit 1101 is also used to adjust the transmission gain control signal output to the target up-conversion link, so that the filtering gain of the low-pass filter and / or the driving gain of the driving amplifier in the target up-conversion link are increased, so that P1 and P2 are equal. For example, the digital baseband circuit 1101 can adjust the data bit, duty cycle, signal amplitude, etc. of the transmission gain control signal output to the target up-conversion link to increase the filtering gain and / or driving gain indicated by the transmission gain control signal. In this way, the digital baseband circuit 1101 can align the transmission power of the first transmission link 1102 and the second transmission link 1103, and reduce the influence of the amplitude difference between the first transmission link 1102 and the second transmission link 1103 on beamforming.

[0107] In some embodiments, the digital baseband circuit 1101 is further used to adjust the transmission gain control signal according to the preset correspondence between the temperature and the filter gain and the drive amplifier gain. For example, when the temperature is high, the filter gain of the low-pass filter in the first transmission chain 1102 and the second transmission chain 1103 is reduced. At this time, the digital baseband circuit 1101 can adjust the transmission gain control signal to increase the filter gain of the low-pass filter and / or the drive amplifier gain, thereby achieving temperature compensation of the filter gain and / or the drive amplifier gain.

[0108] In some embodiments, since both the first transmission link test signal and the second transmission link test signal need to pass through the first receiving link 1104, the digital baseband circuit 1101 can also adjust the transmission gain control signal according to the preset corresponding relationship between the temperature and the receiving gain of the first receiving link 1104. The receiving gain may include the amplification gain of the low noise amplifier 1104b_4, the amplification gain of the transimpedance amplifier 1104b_7, the filtering gain of the low pass filter 1104b_8, etc. in the first receiving link 1104. For example, when the temperature is high, the receiving gain of the first receiving link 1104 decreases. At this time, the digital baseband circuit 1101 can adjust the transmission gain control signal to increase the filtering gain of the low pass filter and / or the driving amplification gain of the driving amplifier, thereby compensating the filtering gain and / or driving amplification gain of the first transmission link 1102 and the second transmission link 1103 according to the temperature and the receiving gain of the first receiving link 1104.

[0109] In some embodiments, the transmission gain control signal includes a digital transmission gain control signal and an analog transmission gain control signal. The digital transmission gain control signal is used to indicate the digital filter gain of the low-pass filter in the first transmission link 1102 and / or the second transmission link 1103, the digital drive amplification gain of the driver amplifier, etc., and the analog transmission gain control signal is used to indicate the analog filter gain of the low-pass filter in the first transmission link 1102 and / or the second transmission link 1103, the analog drive amplification gain of the driver amplifier, etc. The digital baseband circuit 1101 adjusts the transmission gain control signal, which may include adjusting the digital transmission gain control signal, thereby adjusting the digital filter gain and the digital drive amplification gain. Since the changes in the digital filter gain and the digital drive amplification gain will only affect the amplitude of the first transmission link test signal and the second transmission link test signal, but will not affect the phase. Therefore, adjusting the digital transmission gain control signal can reduce the phase drift of the first transmission link test signal and the second transmission link test signal caused by the changes in the analog filter gain and the analog drive amplification gain, thereby improving the calculation accuracy of the transmission link phase difference.

[0110] In addition, the digital baseband circuit 1101 can also obtain a received RF phase difference. The received RF phase difference includes a difference in phase response between the first received RF circuit 1104b and the second received RF circuit 1105b. Figure 7 , Figure 7 A further circuit diagram of the terminal device 111 provided in the present application. The terminal device 111 also includes a receiving RF test circuit, which includes a coupler CP5, a power divider F1, a receiving RF test switch RF1, a receiving RF test switch RF2, a receiving RF test switch RF3, and a receiving RF test switch RF4. Among them, the coupler CP5 is a fifth coupler.

[0111] The coupler CP5 is coupled to the output end of the driving amplifier 1103b_1 in the second transmitting RF circuit 1103b, and is electrically connected to the input end of the power divider F1. The four output ends of the power divider F1 are electrically connected to one of the static contacts of the receiving RF test switch RF1, the receiving RF test switch RF2, the receiving RF test switch RF3, and the receiving RF test switch RF4. The other static contact of the receiving RF test switch RF1, the receiving RF test switch RF2, the receiving RF test switch RF3, and the receiving RF test switch RF4 is electrically connected to the receiving port Rx1_1, the receiving port Rx1_2, the receiving port Rx2_1, and the receiving port Rx2_2. The moving contacts of the receiving RF test switch RF1, the receiving RF test switch RF2, the receiving RF test switch RF3, and the receiving RF test switch RF4 are electrically connected to the input end of the low noise amplifier through an attenuator.

[0112] The transmission link coupled to the coupler CP5 is the target transmission link. In this embodiment, the second transmission link 1103 is the target transmission link. In other embodiments, the target transmission link may also be the first transmission link 1102. That is, the coupler CP5 may be coupled to the output end of the driver amplifier 1102b_1 in the first transmission RF circuit 1102b.

[0113] In this embodiment, when the digital baseband circuit 1101 obtains the transmission link phase difference, the first transmission link test signal and the second transmission link test signal need to pass through the transmission link test switch T1 and the receiving RF test switch RF1. The degree of deterioration of the noise coefficient of the terminal device 111 caused by the transmission link test switch T1 and the receiving RF test switch RF1 is less than 0.2dB. Therefore, the introduction of the transmission link test switch T1 and the receiving RF test switch RF1 can enable the terminal device 111 to still have a higher noise coefficient.

[0114] When the digital baseband circuit 1101 obtains the received RF phase difference, it generates a received RF test signal and transmits it to the target transmission link.

[0115] In some embodiments, the digital baseband circuit 1101 can control the local oscillator circuit 1102b_8 and the local oscillator circuit 1104b_12 to operate at the downlink frequency, thereby ensuring that the frequency of the received RF test signal meets the frequency band of the downlink signal and can be correctly modulated and demodulated.

[0116] After the received RF test signal flows through the second transmitting RF circuit 1103b, the coupler CP5, and the power divider F1, it is divided into two paths for transmission, one path flows through the first receiving RF circuit 1104b, is converted into a first receiving RF feedback signal, and is output to the digital baseband circuit 1101. The other path flows through the second receiving RF circuit 1105b, is converted into a second receiving RF feedback signal, and is output to the digital baseband circuit 1101.

[0117] The digital baseband circuit 1101 receives the first received RF feedback signal and the second received RF feedback signal, and acquires a fifth phase difference between the first received RF feedback signal and the second received RF feedback signal.

[0118] The digital baseband circuit 1101 determines a received radio frequency phase difference according to the fifth phase difference.

[0119] In some embodiments, since the first receiving RF test signal and the second receiving RF test signal flow through the receiving RF test circuit, the phase response of the receiving RF test circuit will also affect the calculated receiving RF phase difference. Among them, the phase response of the receiving RF test circuit includes the phase changes introduced by one or more of the coupler CP5, the power divider F1, the receiving RF test switch RF1, the receiving RF test switch RF2, the receiving RF test switch RF3, the receiving RF test switch RF4, and the circuit routing. Therefore, the digital baseband circuit 1101 can subtract the phase difference corresponding to the phase response of the receiving RF test circuit from the obtained receiving RF phase difference, thereby improving the calculation accuracy of the receiving RF phase difference.

[0120] Another working principle of the digital baseband circuit 1101 for obtaining the inherent phase difference of transmission is described below. Figure 8 , Figure 8 The present application provides a connection diagram of a terminal device 111 and an analysis system 113. The analysis system 113 includes a host device 1131, a vector signal analyzer (Vector Signal Analyzer, VSA) 1132, a vector signal generator (Vector Signal Analyzer, VSG) 1133, a first power divider 1134, a second power divider 1135, a third power divider 1136, and a fourth power divider 1137.

[0121] The output end of the VSA 1132 and the input end of the VSG 1133 are both connected to the host device 1131. The host device 1131 can be connected to the digital baseband circuit 1101 of the terminal device 111 by wireless or wired means.

[0122] The first end of the first power divider 1134 is electrically connected to the first input end of VSA 1132, the second end of the first power divider 1134 is electrically connected to the first output end of VSG 1133, the third end of the first power divider 1134 is electrically connected to the first end of the second power divider 1135, and the second end and the third end of the second power divider 1135 are electrically connected to the antenna switch S1 and the antenna switch S4, respectively.

[0123] A first end of the third power divider 1136 is electrically connected to the second input end of VSA 1132, a second end of the third power divider 1136 is electrically connected to the second output end of VSG 1133, a third end of the third power divider 1136 is electrically connected to a first end of the fourth power divider 1137, and a second end and a third end of the fourth power divider 1137 are electrically connected to the antenna switch S2 and the antenna switch S3, respectively.

[0124] In this embodiment, the inherent transmission phase difference also includes a switch front end phase difference, wherein the switch front end phase difference includes the difference in phase response of the antenna switch circuit 1106 to two uplink signals, for example, the difference in phase response of the antenna switch circuit 1106 to the first uplink signal and the second uplink signal.

[0125] When the digital baseband circuit 1101 obtains the switch front-end phase difference, a first transmission front-end test signal and a second transmission front-end test signal are generated. The frequencies of the first transmission front-end test signal and the second transmission front-end test signal are respectively the first transmission front-end test frequency ff1 and the second transmission front-end test frequency ff2, the first transmission front-end test signal and the second transmission front-end test signal are both single-tone signals, and have the same amplitude Pf and the same phase Phf when generated, that is, the amplitude difference and the phase shift phase difference of the first transmission front-end test signal and the second transmission front-end test signal are both zero.

[0126] The first transmit front-end test signal flows through the first transmit link 1102 and the antenna switch circuit 1106, is converted into a first transmit front-end feedback signal, and is output to the analysis system 113. Taking the case where the first transmit front-end test signal flows through the first-band transmit circuit Tx1_P1 as an example, at this time, the digital baseband circuit 1101 can control the antenna switch S2 to conduct the electrical connection between the first-band transmit circuit Tx1_P1 and the analysis system 113. The second transmit front-end test signal flows through the second transmit link 1103 and the antenna switch circuit 1106, is converted into a second transmit front-end feedback signal, and is output to the analysis system 113. Taking the case where the second transmit link test signal flows through the first-band transmit circuit Tx2_P1 as an example, at this time, the digital baseband circuit 1101 can control the antenna switch S2 to conduct the electrical connection between the first-band transmit circuit Tx2_P1 and the analysis system 113.

[0127] The fourth power divider 1137 outputs the first transmit front-end feedback signal and the second transmit front-end feedback signal to the second input end of VSA 1132 through its first end and the first end of the third power divider 1136, and VSA 1132 outputs the first transmit front-end feedback signal and the second transmit front-end feedback signal to the host device 1131.

[0128] The host device 1131 can distinguish the first transmission front-end feedback signal and the second transmission front-end feedback signal according to the signal frequency. For example, the host device 1131 can use the received signal with a frequency of ff1 as the first transmission front-end feedback signal, and use the received signal with a frequency of ff2 as the second transmission front-end feedback signal.

[0129] The host device 1131 obtains a phase Phf1 of the first transmit front-end feedback signal, and obtains a phase Phf2 of the second transmit front-end feedback signal.

[0130] The host device 1131 determines that the total phase difference between the first transmission front-end feedback signal and the second transmission front-end feedback signal is the difference Phf1f and Phf2f according to the difference Phf1f between Phf1 and Phf and the difference Phf2f between Phf2 and Phf, where Phf12 is the sixth phase difference.

[0131] The host device 1131 can output the sixth phase difference to the digital baseband circuit 1101 of the terminal device 111 through wired connection or wireless communication. At this time, the digital baseband circuit 1101 receives the sixth phase difference output by the host device 1131, and determines the difference between the sixth phase difference and the transmission link phase difference as the switch front end phase difference.

[0132] In addition, the digital baseband circuit 1101 can also obtain a reception front-end phase difference. The reception front-end phase difference includes a difference in phase response between the first reception front-end circuit 1104a and the second reception front-end circuit 1105a.

[0133] Specifically, when the digital baseband circuit 1101 obtains the reception front-end phase difference, the host device 1131 controls the VSG 1133 to generate a reception front-end test signal and outputs it to the second end of the third power divider 1136. The third power divider 1136 outputs the reception front-end test signal to the antenna switch S2 and the antenna switch S3 through the second end and the third end of the fourth power divider 1137, respectively.

[0134] The digital baseband circuit 1101 controls the static contacts connecting the antenna switches S1, S2, S3, and S4 to the first receiving front-end circuit 1104a or the second receiving front-end circuit 1105a to be turned on. In this way, the receiving front-end test signal will flow through the first receiving link 1104 and be converted into the first receiving front-end feedback signal, and the receiving front-end test signal will flow through the second receiving link 1105 and be converted into the second receiving front-end feedback signal.

[0135] The digital baseband circuit 1101 receives the first reception front-end feedback signal and the second reception front-end feedback signal, and obtains a seventh phase difference between the first reception front-end feedback signal and the second reception front-end feedback signal.

[0136] The digital baseband circuit 1101 determines the difference between the seventh phase difference and the received radio frequency phase difference as the receiving front-end phase difference.

[0137] Therefore, when the terminal device 111 obtains the receiving front-end phase difference, the phase change introduced by components such as the low-noise amplifier, filter, antenna switch circuit 1106, circuit routing, etc. in the receiving front-end circuit can be used as the receiving front-end phase difference through the analysis system 113 to improve the accuracy of the receiving inherent phase difference.

[0138] In some embodiments, the host device 1131 controls the VSG 1133 to generate a reception front-end test signal and can also output it to the second end of the first power divider 1134. The first power divider 1134 outputs the reception front-end test signal to the antenna switch S1 and the antenna switch S4 through the second end and the third end of the second power divider 1135 respectively.

[0139] After the digital baseband circuit 1101 obtains the transmission link phase difference, the reception RF phase difference, the switch front end phase difference and the reception front end phase difference, the sum of the transmission link phase difference and the switch front end phase difference can be used as the transmission inherent phase difference, and the sum of the reception RF phase difference and the reception front end phase difference can be used as the reception inherent phase difference, and stored in the register.

[0140] The following describes the working principle of the digital baseband circuit 1101 to obtain the first corresponding relationship. Fig. 9 , Fig. 9The figure is a schematic diagram of the communication between the terminal device 111 and the test device 114. The terminal device 111 and the test device 114 are both arranged in a microwave darkroom, and the interval distance between the terminal device 111 and the test device 114 is greater than the preset distance. In this way, the influence of electromagnetic noise or clutter interference on the wireless communication between the terminal device 111 and the test device 114 can be reduced. When the interval distance between the terminal device 111 and the test device 114 is greater than the preset distance, the electromagnetic waves for communication between the terminal device 111 and the test device 114 are more stable, and the accuracy of the calculation of the communication parameters between the terminal device 111 and the test device 114 can be improved.

[0141] The test device 114 can transmit a test downlink signal to the terminal device 111 through the antenna ANTX. At this time, the terminal device 111 receives the test downlink signal, the first receiving link 1104 converts the test downlink signal into a first test downlink signal, and the second receiving link 1105 converts the downlink signal into a second test downlink signal.

[0142] The relative positions of the test device 114 and the terminal device 111 are changed so that the test device 114 transmits a plurality of different test downlink signals at a plurality of different positions.

[0143] The digital baseband circuit 1101 can obtain a third relationship between a preset air interface phase difference and an arrival angle. The air interface phase difference is the difference between the phase when the downlink signal arrives at the first receiving link 1104 and the phase when the downlink signal arrives at the second receiving link 1105. The arrival angle is the direction angle when the downlink signal arrives at the terminal device 111, and the downlink signal may include multiple test downlink signals.

[0144] The digital baseband circuit 1101 may use the sum of each air interface phase difference and the inherent reception phase difference in the third relationship as the downlink phase difference of the arrival angle corresponding to the air interface phase difference, so as to obtain the first relationship between the downlink phase difference and the arrival angle.

[0145] The digital baseband circuit 1101 can also obtain multiple test phase differences between multiple first test downlink signals and corresponding second test downlink signals, and determine multiple arrival angles corresponding to multiple downlink phase differences that match the multiple test phase differences based on the first relationship between the downlink phase difference and the arrival angle.

[0146] The digital baseband circuit 1101 can generate a corresponding first uplink test signal and a second uplink test signal according to each arrival angle, wherein the phase difference between each first uplink test signal and the corresponding second uplink test signal is a target phase difference, and the target phase difference is used to make the signal strength received by the test device 114 greater than the strength threshold corresponding to the current arrival angle. Thereafter, the digital baseband circuit 1101 can determine the target phase difference as the first phase difference corresponding to the current arrival angle, and obtain a fourth relationship between the arrival angle and the first phase difference according to multiple arrival angles and their corresponding multiple first phase differences.

[0147] The digital baseband circuit 1101 may use the difference between each first phase difference and the inherent phase difference of the transmission in the fourth relationship as the phase compensation value of the angle of arrival corresponding to the first phase difference to obtain a second relationship between the angle of arrival and the phase compensation value. In this way, the digital baseband circuit 1101 may determine the first relationship and the second relationship included in the first corresponding relationship, thereby obtaining the first corresponding relationship.

[0148] Combine the following Figures 10 to 18 The communication method provided in the present application is described. The communication method is executed by the terminal device 111. The detailed description of each step can be found in the specific functional description of the digital baseband circuit 1101 above, which will not be repeated here.

[0149] See also Fig.10 , Fig.10 This is a flow chart of the communication method provided by the present application. The communication method is executed by the terminal device 111, and the communication method includes the following steps.

[0150] Step S101: receiving a downlink signal from a wireless access device, and converting the downlink signal into a first downlink signal and a second downlink signal.

[0151] Step S102: Acquire a real-time downlink phase difference between the first downlink signal and the second downlink signal.

[0152] Step S103: Acquire a first corresponding relationship between a downlink phase difference and a phase compensation value.

[0153] Step S104: According to the first corresponding relationship, a phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference is determined as the real-time phase compensation value.

[0154] Step S105: Compensate the phase difference between the first uplink signal and the second uplink signal according to the real-time phase compensation value and transmit the phase difference to the wireless access device.

[0155] See also Fig.11 , Fig.11A flow chart of a method for obtaining a corresponding relationship between a preset downlink phase difference and a first phase difference in the communication method provided in the present application. The steps included are as follows.

[0156] Step S1101: According to the first relationship, the arrival angle corresponding to the downlink phase difference that matches the real-time downlink phase difference is determined as the real-time arrival angle.

[0157] Step S1102: According to the second relationship, a phase compensation value corresponding to an angle of arrival that matches the real-time angle of arrival is determined as a real-time phase compensation value.

[0158] See also Fig.12 , Fig.12 A flow chart of a method for obtaining a first relationship in a communication method provided by the present application. The steps included are as follows.

[0159] Step S1201, obtaining a receiving inherent phase difference.

[0160] Step S1202: Obtain a third relationship between a preset air interface phase difference and an arrival angle.

[0161] Step S1203: taking the sum of each air interface phase difference and the inherent reception phase difference in the third relationship as the downlink phase difference of the arrival angle corresponding to the air interface phase difference, so as to obtain the first relationship.

[0162] See also Fig.13 , Fig.13 A flow chart of a method for obtaining a second relationship in the communication method provided by the present application. The steps included are as follows.

[0163] Step S1301, obtaining the transmission inherent phase difference.

[0164] Step S1302: Acquire a fourth relationship between the arrival angle and the first phase difference.

[0165] Step S1303: taking the difference between each first phase difference and the transmission inherent phase difference in the fourth relationship as the phase compensation value of the arrival angle corresponding to the first phase difference, so as to obtain the second relationship.

[0166] See also Fig.14 , Fig.14 A flow chart of a method for obtaining a third relationship in the communication method provided by the present application. The steps included are as follows.

[0167] Step S1401: receiving a plurality of test downlink signals respectively transmitted by a test device at a plurality of different positions, and converting the plurality of test downlink signals into a plurality of first downlink test signals and a plurality of corresponding second test downlink signals.

[0168] Step S1402: Acquire a plurality of test phase differences between a plurality of first downlink test signals and corresponding second test downlink signals.

[0169] Step S1403: Determine, according to the first relationship, a plurality of arrival angles corresponding to a plurality of downlink phase differences that respectively match the plurality of test phase differences.

[0170] Step S1404: Generate a corresponding first uplink test signal and a corresponding second uplink test signal according to each arrival angle, wherein the phase difference between each first uplink test signal and the corresponding second uplink test signal is a target phase difference.

[0171] Step S1405: determine the target phase difference as the first phase difference corresponding to the current arrival angle.

[0172] Step S1406: Acquire a fourth relationship according to the multiple arrival angles and the multiple first phase differences corresponding thereto.

[0173] See also Fig.15 , Fig.15 This is a flow chart of a method for obtaining a transmission link phase difference in a communication method provided in the present application. The steps included are as follows.

[0174] Step S1501: Generate a first transmission link test signal and a second transmission link test signal.

[0175] Step S1502: Receive a first transmit link feedback signal and a second transmit link feedback signal.

[0176] Step S1503: Acquire a third phase difference between the first transmission link feedback signal and the first transmission link test signal and a fourth phase difference between the second transmission link feedback signal and the second transmission link test signal.

[0177] Step S1504: determine the transmission link phase difference according to the difference between the third phase difference and the fourth phase difference.

[0178] In some embodiments, after step S1503, the communication method further includes the following steps (not shown in the figure).

[0179] Step S1505, obtaining the amplitudes of the first transmission link feedback signal and the first transmission link test signal.

[0180] Step S1506: The link with the smaller transmission power between the first transmission link 1102 and the second transmission link 1103 is used as the target transmission link to be increased.

[0181] Step S1507, adjusting the transmission gain control signal output to the target gain-increasing link so that the amplitude of the first transmission link feedback signal is equal to the amplitude of the first transmission link test signal.

[0182] See also Fig.16 , Fig.16 A flow chart of a method for obtaining a received radio frequency phase difference in a communication method provided in the present application. The steps included are as follows.

[0183] Step S1601: Generate a received radio frequency test signal.

[0184] Step S1602: Receive a first received RF feedback signal and a second received RF feedback signal.

[0185] Step S1603: Acquire a fifth phase difference between the first received RF feedback signal and the second received RF feedback signal.

[0186] Step S1604: determine a received radio frequency phase difference according to the fifth phase difference.

[0187] See also Fig.17 , Fig.17 This is a flow chart of a method for obtaining a switch front end phase difference in a communication method provided in the present application. The steps included are as follows.

[0188] Step S1701, generating a first transmit front-end test signal and a second transmit front-end test signal.

[0189] Step S1702: Receive and analyze the sixth phase difference output by the system, and determine the difference between the sixth phase difference and the transmission link phase difference as the switch front end phase difference.

[0190] See also Fig.18 , Fig.18 A flow chart of a method for obtaining a receiving front-end phase difference in a communication method provided in the present application. The steps included are as follows.

[0191] Step S1801, receiving a first receiving front-end feedback signal and a second receiving front-end feedback signal.

[0192] Step S1802: Acquire a seventh phase difference between the first receiving front-end feedback signal and the second receiving front-end feedback signal.

[0193] Step S1803: determine the difference between the seventh phase difference and the receiving radio frequency phase difference as the receiving front-end phase difference.

[0194] See also Fig.19 , Fig.19 Another flow chart of the communication method provided by the present application. In some embodiments, the communication method provided by the present application includes a power-on loopback calibration phase, a production line calibration phase, a darkroom calibration phase, and an application phase. The power-on loopback calibration phase includes steps S1901 to S1903. For details, please refer to Figure 15 to Figure 16The relevant steps of the production line calibration phase include steps S1904 to S1905. For details, please refer to Figure 17 to Figure 18 The darkroom calibration phase includes step S1907, and the specific description can be found in Figures 11 to 14 The application stage includes step S1908, and the specific description can be found in Fig.10 The relevant steps are described in detail here.

[0195] Step S1901: Generate a received radio frequency test signal, receive a first received radio frequency feedback signal and a second received radio frequency feedback signal, and determine a received radio frequency phase difference.

[0196] Step S1902: Generate a first transmission link test signal and a second transmission link test signal, receive a first transmission link feedback signal and a second transmission link feedback signal, and determine a transmission link phase difference.

[0197] Step S1903, adjusting the transmission gain control signal output to the target gain-increasing link so that the amplitude of the first transmission link feedback signal is equal to the amplitude of the first transmission link test signal.

[0198] Step S1904, generating a first transmit front-end test signal and a second transmit front-end test signal, and receiving a sixth phase difference output by the analysis system to determine a switch front-end phase difference.

[0199] Step S1905: receiving a first receiving front-end feedback signal and a second receiving front-end feedback signal, and determining a receiving front-end phase difference.

[0200] Step S1906, determining that the transmission inherent phase difference is the sum of the transmission link phase difference and the switch front end phase difference, and the reception inherent phase difference is the sum of the reception RF phase difference and the reception front end phase difference.

[0201] Step S1907, receiving multiple test downlink signals respectively transmitted by the test equipment at multiple different positions, and converting the multiple test downlink signals into multiple first downlink test signals and corresponding multiple second test downlink signals to obtain a first corresponding relationship between the downlink phase difference and the phase compensation value.

[0202] Step S1908, receiving a downlink signal from a wireless access device, and converting the downlink signal into a first downlink signal and a second downlink signal, determining a real-time phase compensation value according to the first corresponding relationship, and compensating the phase difference between the first uplink signal and the second uplink signal according to the real-time phase compensation value before transmitting to the wireless access device.

[0203] Therefore, the communication method provided by the present application obtains the first corresponding relationship between the downlink phase difference and the corresponding phase compensation value, thereby obtaining the phase compensation value corresponding to the real-time phase difference, and then performs phase difference compensation on multiple uplink signals, which can better control the phase difference of multiple uplink signals, so that the gain of the transmitted signal of the terminal device in a specific direction is optimal. At the same time, for the circuit structure of the terminal device 111, the phase changes introduced by components such as each transmitting link, receiving link, test circuit, antenna switch, circuit routing, etc. can be calibrated, and the digital gain of each transmitting link can be compensated according to the temperature, thereby improving the dynamic working stability of the terminal device 111.

[0204] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection claimed in the present application.

Claims

1. A communication method, applied to a terminal device, wherein the terminal device is used to generate and transmit a first uplink signal and a second uplink signal to a wireless access device, characterized in that: The method comprises: Receiving a downlink signal from the wireless access device, and converting the downlink signal into a first downlink signal and a second downlink signal; Acquire a real-time downlink phase difference between the first downlink signal and the second downlink signal; Obtaining a first corresponding relationship between a downlink phase difference and a phase compensation value; According to the first corresponding relationship, determining the phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference as the real-time phase compensation value; The phase difference between the first uplink signal and the second uplink signal is compensated according to the real-time phase compensation value and then transmitted to the wireless access device.

2. The communication method according to claim 1, characterized in that: The first corresponding relationship includes a first relationship between a downlink phase difference and an angle of arrival and a second relationship between the angle of arrival and a phase compensation value, and determining, according to the first corresponding relationship, a phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference as the real-time phase compensation value, includes: According to the first relationship, determining the arrival angle corresponding to the downlink phase difference that matches the real-time downlink phase difference as the real-time arrival angle, wherein the arrival angle is the direction angle when the downlink signal reaches the terminal device; According to the second relationship, a phase compensation value corresponding to the arrival angle that matches the real-time arrival angle is determined as the real-time phase compensation value.

3. The communication method according to claim 2, characterized in that: The terminal device includes a first receiving link and a second receiving link, the first receiving link is used to convert the downlink signal into the first downlink signal, and the second receiving link is used to convert the downlink signal into the second downlink signal, and the method further includes: Acquire a receiving inherent phase difference, wherein the receiving inherent phase difference comprises a phase response difference between the first receiving link and the second receiving link; Obtaining a third relationship between a preset air interface phase difference and an arrival angle, wherein the air interface phase difference is a difference between a phase when the downlink signal arrives at the first receiving link and a phase when the downlink signal arrives at the second receiving link; The sum of each air interface phase difference in the third relationship and the inherent reception phase difference is used as the downlink phase difference of the arrival angle corresponding to the air interface phase difference, so as to obtain the first relationship.

4. The communication method according to claim 3, characterized in that: The method further comprises: Acquire a transmission inherent phase difference, wherein the transmission inherent phase difference is a difference between a first phase difference between the transmitted first uplink signal and the second uplink signal and a second phase difference between the generated first uplink signal and the second uplink signal; acquiring a fourth relationship between the angle of arrival and the first phase difference; The difference between each first phase difference in the fourth relationship and the transmission inherent phase difference is used as the phase compensation value of the arrival angle corresponding to the first phase difference to obtain the second relationship.

5. The communication method according to claim 4, characterized in that: The method further comprises: Receiving a plurality of test downlink signals respectively transmitted by the test equipment at a plurality of different positions, and converting the plurality of test downlink signals into a plurality of first test downlink signals and a plurality of corresponding second test downlink signals; Acquire a plurality of test phase differences between a plurality of the first test downlink signals and corresponding second test downlink signals; Determine, according to the first relationship, a plurality of arrival angles respectively corresponding to a plurality of downlink phase differences respectively matching the plurality of test phase differences; Generate a corresponding first uplink test signal and a corresponding second uplink test signal according to each arrival angle, wherein the phase difference between each of the first uplink test signal and the corresponding second uplink test signal is a target phase difference, and the target phase difference is used to make the signal strength received by the test device greater than the strength threshold corresponding to the current arrival angle; Determine the target phase difference as a first phase difference corresponding to the current angle of arrival; The fourth relationship is obtained according to a plurality of arrival angles and a plurality of first phase differences corresponding thereto.

6. The communication method according to claim 4, characterized in that: The terminal device includes a first transmitting link and a second transmitting link, the first receiving link includes a first receiving radio frequency circuit, and the second receiving link includes a second receiving radio frequency circuit; The transmission inherent phase difference comprises a transmission link phase difference, wherein the transmission link phase difference is a difference in phase response between the first transmission link and the second transmission link; The receiving inherent phase difference includes a receiving radio frequency phase difference, and the receiving radio frequency phase difference is a difference in phase response between the first receiving radio frequency circuit and the second receiving radio frequency circuit.

7. The communication method according to claim 6, characterized in that: The terminal device further includes a transmission link test circuit, and the method further includes: Generate a first transmission link test signal and a second transmission link test signal; receiving a first transmission link feedback signal and a second transmission link feedback signal, wherein the first transmission link feedback signal is a signal of the first transmission link test signal after flowing through the first transmission link, the transmission link test circuit, and the target receiving link, and the second transmission link feedback signal is a signal of the second transmission link test signal after flowing through the second transmission link, the transmission link test circuit, and the target receiving link, and the target receiving link is the first receiving link or the second receiving link; Acquire a third phase difference between the first transmission link feedback signal and the first transmission link test signal and a fourth phase difference between the second transmission link feedback signal and the second transmission link test signal; The transmission link phase difference is determined according to the difference between the third phase difference and the fourth phase difference.

8. The communication method according to claim 6, characterized in that: The terminal device further includes a receiving radio frequency test circuit, and the method further includes: generating a receive radio frequency test signal; Receive a first received RF feedback signal and a second received RF feedback signal, wherein the first received RF feedback signal is a signal of the received RF test signal after it flows through the target transmission link, the received RF test circuit and the first received RF circuit, and the second received RF feedback signal is a signal of the received RF test signal after it flows through the target transmission link, the received RF test circuit and the second received RF circuit, and the target transmission link is the first transmission link or the second transmission link; Acquire a fifth phase difference between the first received RF feedback signal and the second received RF feedback signal; The received radio frequency phase difference is determined according to the fifth phase difference.

9. The communication method according to claim 6, characterized in that: The terminal device further includes an antenna switch circuit, the first receiving link further includes a first receiving front-end circuit, and the second receiving link further includes a second receiving front-end circuit; The transmission inherent phase difference also includes a switch front end phase difference, wherein the switch front end phase difference is a difference between a phase response of the antenna switch circuit to the first uplink signal and a phase response of the antenna switch circuit to the second uplink signal; The receiving inherent phase difference also includes a receiving front-end phase difference, wherein the receiving front-end phase difference is a difference in phase response between the first receiving front-end circuit and the second receiving front-end circuit.

10. The communication method according to claim 9, characterized in that: The first transmission link and the second transmission link are both electrically connected to the analysis system through the antenna switch circuit, and the method further includes: Generate a first transmit front-end test signal and a second transmit front-end test signal; receiving a sixth phase difference output by the analysis system, and determining a difference between the sixth phase difference and the transmission link phase difference as the switch front end phase difference; Among them, the analysis system receives a first transmit front-end feedback signal and a second transmit front-end feedback signal, and uses the phase difference between the first transmit front-end feedback signal and the second transmit front-end feedback signal as the sixth phase difference and transmits it to the terminal device, the first transmit front-end feedback signal is the signal after the first transmit front-end test signal flows through the first transmit link and the antenna switching circuit, and the second transmit front-end feedback signal is the signal after the second transmit front-end feedback signal flows through the second transmit link and the antenna switching circuit.

11. The communication method according to claim 10, characterized in that: The first receiving link and the second receiving link are both electrically connected to the analysis system through the antenna switch circuit, and the method further includes: Receiving a first receiving front-end feedback signal and a second receiving front-end feedback signal; Acquire a seventh phase difference between the first receiving front-end feedback signal and the second receiving front-end feedback signal; Determine the difference between the seventh phase difference and the receiving radio frequency phase difference as the receiving front-end phase difference; In which, the analysis system generates and outputs a receiving front-end test signal to the terminal device, the first receiving front-end feedback signal is the signal after the receiving front-end test signal flows through the antenna switch circuit and the first receiving link, and the second receiving front-end feedback signal is the signal after the receiving front-end test signal flows through the antenna switch circuit and the second receiving link.

12. A terminal device, characterized in that: The terminal device includes a first transmitting link, a second transmitting link, a first receiving link, a second receiving link, and a digital baseband circuit, wherein the digital baseband circuit is electrically connected to the first transmitting link, the second transmitting link, the first receiving link, and the second receiving link, wherein the first receiving link is used to convert a downlink signal from a wireless access device into a first downlink signal, and the second receiving link is used to convert the downlink signal into a second downlink signal, and the digital baseband circuit is used to generate and transmit a first uplink signal and a second uplink signal to the wireless access device, and the digital baseband circuit is used to: receiving the first downlink signal and the second downlink signal; Acquire a real-time downlink phase difference between the first downlink signal and the second downlink signal; Obtaining a first corresponding relationship between a downlink phase difference and a phase compensation value; According to the first corresponding relationship, determining the phase compensation value corresponding to the downlink phase difference that matches the real-time downlink phase difference as the real-time phase compensation value; The phase difference between the first uplink signal and the second uplink signal is compensated according to the real-time phase compensation value and then transmitted to the wireless access device.

13. The terminal device according to claim 12, characterized in that: The first corresponding relationship includes a first relationship between a downlink phase difference and an angle of arrival and a second relationship between an angle of arrival and a phase compensation value, and the phase compensation value corresponding to the downlink phase difference matching the real-time downlink phase difference is determined as the real-time phase compensation value according to the first corresponding relationship, including: the digital baseband circuit is used to: According to the first relationship, determining the arrival angle corresponding to the downlink phase difference that matches the real-time downlink phase difference as the real-time arrival angle, wherein the arrival angle is the direction angle when the downlink signal reaches the terminal device; According to the second relationship, a phase compensation value corresponding to the arrival angle that matches the real-time arrival angle is determined as the real-time phase compensation value.

14. The terminal device according to claim 13, characterized in that: The digital baseband circuit is also used for: Acquire a receiving inherent phase difference, wherein the receiving inherent phase difference comprises a phase response difference between the first receiving link and the second receiving link; Obtaining a third relationship between a preset air interface phase difference and an arrival angle, wherein the air interface phase difference is a difference between a phase when the downlink signal arrives at the first receiving link and a phase when the downlink signal arrives at the second receiving link; The sum of each air interface phase difference in the third relationship and the inherent reception phase difference is used as the downlink phase difference of the arrival angle corresponding to the air interface phase difference, so as to obtain the first relationship.

15. The terminal device according to claim 14, characterized in that: The digital baseband circuit is also used for: Acquire a transmission inherent phase difference, wherein the transmission inherent phase difference is a difference between a first phase difference between the transmitted first uplink signal and the second uplink signal and a second phase difference between the generated first uplink signal and the second uplink signal; acquiring a fourth relationship between the angle of arrival and the first phase difference; The difference between each first phase difference in the fourth relationship and the transmission inherent phase difference is used as the phase compensation value of the arrival angle corresponding to the first phase difference to obtain the second relationship.

16. The terminal device according to claim 15, characterized in that: The digital baseband circuit is also used for: Receiving a plurality of test downlink signals respectively transmitted by the test equipment at a plurality of different positions, and converting the plurality of test downlink signals into a plurality of first test downlink signals and a plurality of corresponding second test downlink signals; Acquire a plurality of test phase differences between a plurality of the first test downlink signals and corresponding second test downlink signals; Determine, according to the first relationship, a plurality of arrival angles respectively corresponding to a plurality of downlink phase differences respectively matching the plurality of test phase differences; Generate a corresponding first uplink test signal and a corresponding second uplink test signal according to each arrival angle, wherein the phase difference between each of the first uplink test signal and the corresponding second uplink test signal is a target phase difference, and the target phase difference is used to make the signal strength received by the test device greater than the strength threshold corresponding to the current arrival angle; Determine the target phase difference as a first phase difference corresponding to the current angle of arrival; The fourth relationship is obtained according to a plurality of arrival angles and a plurality of first phase differences corresponding thereto.

17. The terminal device according to claim 15, characterized in that: The first receiving chain includes a first receiving radio frequency circuit, and the second receiving chain includes a second receiving radio frequency circuit; The transmission inherent phase difference comprises a transmission link phase difference, wherein the transmission link phase difference is a difference in phase response between the first transmission link and the second transmission link; The receiving inherent phase difference includes a receiving radio frequency phase difference, and the receiving radio frequency phase difference is a difference in phase response between the first receiving radio frequency circuit and the second receiving radio frequency circuit.

18. The terminal device according to claim 17, characterized in that: The terminal device further includes a transmission link test circuit, and the digital baseband circuit is further used for: Generate a first transmission link test signal and a second transmission link test signal; receiving a first transmission link feedback signal and a second transmission link feedback signal, wherein the first transmission link feedback signal is a signal of the first transmission link test signal after flowing through the first transmission link, the transmission link test circuit, and the target receiving link, and the second transmission link feedback signal is a signal of the second transmission link test signal after flowing through the second transmission link, the transmission link test circuit, and the target receiving link, and the target receiving link is the first receiving link or the second receiving link; Acquire a third phase difference between the first transmission link feedback signal and the first transmission link test signal and a fourth phase difference between the second transmission link feedback signal and the second transmission link test signal; The transmission link phase difference is determined according to the difference between the third phase difference and the fourth phase difference.

19. The terminal device according to claim 18, characterized in that: The transmission link test circuit includes a first coupler, a second coupler and a first transmission link test switch; A first end of the first coupler is coupled to an output end of the first transmission link, and a first end of the second coupler is coupled to an output end of the second transmission link; The second ends of the first coupler and the second coupler are both electrically connected to the static contact of the first transmission link test switch, and the moving contact of the first transmission link test switch is electrically connected to the target receiving link.

20. The terminal device according to claim 17, characterized in that: The terminal device further includes a receiving radio frequency test circuit, and the digital baseband circuit is further used for: generating a receive radio frequency test signal; Receive a first received RF feedback signal and a second received RF feedback signal, wherein the first received RF feedback signal is a signal of the received RF test signal after it flows through the target transmission link, the received RF test circuit and the first received RF circuit, and the second received RF feedback signal is a signal of the received RF test signal after it flows through the target transmission link, the received RF test circuit and the second received RF circuit, and the target transmission link is the first transmission link or the second transmission link; Acquire a fifth phase difference between the first received RF feedback signal and the second received RF feedback signal; The received radio frequency phase difference is determined according to the fifth phase difference.

21. The terminal device according to claim 20, characterized in that: The first receiving RF circuit and the second receiving RF circuit both include a first-band low-noise amplifier and a second-band low-noise amplifier, and the receiving RF test circuit includes a fifth coupler, a power divider, a first receiving RF test switch, a second receiving RF test switch, a third receiving RF test switch, and a fourth receiving RF test switch; The first end of the fifth coupler is coupled to the target transmission link, the second end of the fifth coupler is electrically connected to the input end of the power divider, and the output end of the power divider is electrically connected to the static contacts of the first receiving RF test switch, the second receiving RF test switch, the third receiving RF test switch, and the fourth receiving RF test switch; The moving contacts of the first receiving RF test switch, the second receiving RF test switch, the third receiving RF test switch and the fourth receiving RF test switch are respectively electrically connected to the input end of the first-band low-noise amplifier of the first receiving RF circuit, the input end of the second-band low-noise amplifier of the first receiving RF circuit, the input end of the first-band low-noise amplifier of the second receiving RF circuit and the input end of the second-band low-noise amplifier of the second receiving RF circuit.

22. The terminal device according to claim 17, characterized in that: The terminal device further includes an antenna switch circuit, the first receiving link further includes a first receiving front-end circuit, and the second receiving link further includes a second receiving front-end circuit; The transmission inherent phase difference also includes a switch front end phase difference, wherein the switch front end phase difference is a difference between a phase response of the antenna switch circuit to the first uplink signal and a phase response of the antenna switch circuit to the second uplink signal; The receiving inherent phase difference also includes a receiving front-end phase difference, wherein the receiving front-end phase difference is a difference in phase response between the first receiving front-end circuit and the second receiving front-end circuit.

23. The terminal device according to claim 22, characterized in that: The first transmission link and the second transmission link are both electrically connected to the analysis system through the antenna switch circuit, and the digital baseband circuit is further used for: Generate a first transmit front-end test signal and a second transmit front-end test signal; receiving a sixth phase difference output by the analysis system, and determining a difference between the sixth phase difference and the transmission link phase difference as the switch front end phase difference; Among them, the analysis system receives a first transmit front-end feedback signal and a second transmit front-end feedback signal, and uses the phase difference between the first transmit front-end feedback signal and the second transmit front-end feedback signal as the sixth phase difference and transmits it to the terminal device, the first transmit front-end feedback signal is the signal after the first transmit front-end test signal flows through the first transmit link and the antenna switching circuit, and the second transmit front-end feedback signal is the signal after the second transmit front-end feedback signal flows through the second transmit link and the antenna switching circuit.

24. The terminal device according to claim 23, characterized in that: The first receiving link and the second receiving link are both electrically connected to the analysis system through the antenna switch circuit, and the digital baseband circuit further includes: Receiving a first receiving front-end feedback signal and a second receiving front-end feedback signal; Acquire a seventh phase difference between the first receiving front-end feedback signal and the second receiving front-end feedback signal; Determine the difference between the seventh phase difference and the receiving radio frequency phase difference as the receiving front-end phase difference; In which, the analysis system generates and outputs a receiving front-end test signal to the terminal device, the first receiving front-end feedback signal is the signal after the receiving front-end test signal flows through the antenna switch circuit and the first receiving link, and the second receiving front-end feedback signal is the signal after the receiving front-end test signal flows through the antenna switch circuit and the second receiving link.

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