Radio frequency system, terminal and anti-interference method

Abstract

The present application discloses a radio frequency system, a terminal and an anti-interference method. The radio frequency system includes a radio frequency signal transceiver, an ENDC platform, a GPS platform, an AND gate circuit and a processor connected to the AND gate circuit. The radio frequency signal transceiver is used to transmit and receive radio frequency signals. The ENDC platform includes a first transmission path, a second transmission path, a first power supply and a second power supply. The first transmission path is connected to the radio frequency signal transceiver and supports the transmission of radio frequency signals of a first standard from a cellular antenna, and the first power supply supplies power to the first transmission path. The second transmission path is connected to the radio frequency signal transceiver and supports the transmission of radio frequency signals of a second standard from a cellular antenna, and the second power supply supplies power to the second transmission path. The GPS platform includes a GPS receiving circuit and a third power supply. The GPS receiving circuit is connected to the radio frequency signal transceiver, and is used to receive GPS radio frequency signals and transmit GPS radio frequency signals to the radio frequency signal transceiver, and the third power supply supplies power to the GPS receiving circuit. The AND gate circuit is connected to the ENDC platform and the GPS platform and outputs a detection signal.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and more specifically, to a radio frequency system, a terminal, and an anti-interference method. Background Art

[0002] The Global Positioning System (GPS) is a system that uses GPS positioning satellites to perform real-time positioning and navigation around the world. Currently, as a mature positioning and navigation system, GPS has been widely used.

[0003] On the client side, the GPS platform is mainly used to receive GPS satellite signals and determine the ground space position based on the received satellite signals. The GPS platform is easily interfered by various external signals.

[0004] During operation, the GPS platform is susceptible to interference from other electronic devices. For example, the frequency of the intermodulation signal generated by the cellular antenna operating frequency band is likely to fall near the GPS platform operating frequency band, raising the GPS platform's noise floor and reducing GPS performance. Summary of the invention

[0005] The embodiments of the present application provide a radio frequency system, a terminal and an anti-interference method, which are used to at least solve the problem of interference to GPS.

[0006] The radio frequency system of the embodiment of the present application includes a radio frequency signal transceiver, an ENDC platform, a GPS platform, an AND gate circuit and a processor. The radio frequency signal transceiver is used to transmit and receive radio frequency signals. The ENDC platform includes a first transmission path, a second transmission path, a first power supply and a second power supply. The first transmission path is connected to the radio frequency signal transceiver and supports the transmission of radio frequency signals of the first standard from the cellular antenna, and the first power supply supplies power to the first transmission path. The second transmission path is connected to the radio frequency signal transceiver and supports the transmission of radio frequency signals of the second standard from the cellular antenna, and the second power supply supplies power to the second transmission path. The GPS platform includes a GPS receiving circuit and a third power supply. The GPS receiving circuit is connected to the radio frequency signal transceiver, and is used to receive GPS radio frequency signals and transmit the GPS radio frequency signals to the radio frequency signal transceiver, and the third power supply supplies power to the GPS receiving circuit. The AND gate circuit is connected to the ENDC platform and the GPS platform and outputs a detection signal. The processor is connected to the AND gate circuit and is used to: determine the working mode of the ENDC platform and the start-up state of the GPS platform according to the detection signal; when the ENDC platform is in the ENDC working mode and the GPS platform is turned on, detect whether the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds a preset range; and when the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds the preset range, control the switching of the currently working cellular antenna on the ENDC platform.

[0007] The terminal of the embodiment of the present application includes a radio frequency system and a body, and the radio frequency system is installed on the body. The radio frequency system includes a radio frequency signal transceiver, an ENDC platform, a GPS platform, an AND gate circuit and a processor. The radio frequency signal transceiver is used to transmit and receive radio frequency signals. The ENDC platform includes a first transmission path, a second transmission path, a first power supply and a second power supply. The first transmission path is connected to the radio frequency signal transceiver and supports the transmission of radio frequency signals of the first standard from the cellular antenna, and the first power supply supplies power to the first transmission path. The second transmission path is connected to the radio frequency signal transceiver and supports the transmission of radio frequency signals of the second standard from the cellular antenna, and the second power supply supplies power to the second transmission path. The GPS platform includes a GPS receiving circuit and a third power supply. The GPS receiving circuit is connected to the radio frequency signal transceiver, and is used to receive GPS radio frequency signals and transmit the GPS radio frequency signals to the radio frequency signal transceiver, and the third power supply supplies power to the GPS receiving circuit. The AND gate circuit is connected to the ENDC platform and the GPS platform and outputs a detection signal. The processor is connected to the AND gate circuit and is used to: determine the working mode of the ENDC platform and the start-up state of the GPS platform according to the detection signal; when the ENDC platform is in the ENDC working mode and the GPS platform is turned on, detect whether the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds a preset range; and when the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds the preset range, control the switching of the currently working cellular antenna on the ENDC platform.

[0008] The anti-interference method of the embodiment of the present application is used for a radio frequency system, wherein the radio frequency system includes a radio frequency signal transceiver, an ENDC platform connected to the radio frequency signal transceiver, a GPS platform connected to the radio frequency signal transceiver, and an AND gate circuit; the anti-interference method includes: determining the working mode of the ENDC platform and the on state of the GPS platform according to the detection signal output by the AND gate circuit; when the ENDC platform is in the ENDC working mode and the GPS platform is turned on, detecting whether the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds a preset range; and when the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds the preset range, controlling the switching of the currently working cellular antenna on the ENDC platform.

[0009] In the RF system, terminal and anti-interference method of the implementation mode of the present application, when the ENDC platform is in the ENDC working mode and the GPS platform is turned on, if the influence of the RF signal of the ENDC platform on the GPS RF signal exceeds a preset range, the currently working cellular antenna on the ENDC platform is controlled to switch, thereby selecting a cellular antenna with a greater isolation from the GPS antenna in the GPS platform to work, so that the intensity of the intermodulation signal entering the GPS antenna becomes smaller, thereby reducing or even eliminating the interference of the cellular signal on the GPS RF signal, thereby ensuring GPS performance.

[0010] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0012] Figure 1 is a schematic diagram of the structure of a radio frequency system of certain embodiments of the present application;

[0013] Figure 2 is a schematic diagram of the structure of a radio frequency system of certain embodiments of the present application;

[0014] Figure 3 is a schematic flow chart of an anti-interference method in certain embodiments of the present application;

[0015] Figure 4 is a schematic flow chart of an anti-interference method in certain embodiments of the present application;

[0016] Figure 5 It is a schematic diagram of the structure of a terminal of certain embodiments of the present application.

[0017] Description of main component symbols:

[0018] Terminal 1000, radio frequency system 100, main body 200;

[0019] A radio frequency signal transceiver 10;

[0020] ENDC platform 20; first transmitting path 21, first transmitting module 211, first antenna group 215, first cellular antenna 2151, first switch 217; second transmitting path 23, second transmitting module 231, second antenna group 235, second cellular antenna 2351, second switch 237; first power supply 25, second power supply 27;

[0021] GPS platform 30, GPS receiving circuit 31, first filter 311, amplifier 313, second filter 315, third power supply 33;

[0022] AND gate circuit 40 , first AND gate 41 , second AND gate 43 , AND gate 45 ; processor 50 , memory 60 . DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0024] At present, on the client side, the GPS platform is mainly used to receive GPS satellite signals, and the ground space position is determined based on the received satellite signals. The GPS platform is susceptible to interference from various external signals. During operation, the GPS platform is susceptible to interference from other electronic devices. For example, the frequency of the intermodulation signal generated by the working frequency band of the cellular antenna is likely to fall near the working frequency band of the GPS platform, raising the background noise of the GPS platform and reducing GPS performance. To solve this problem, the present application provides a radio frequency system 100 ( Figure 1 or Figure 2 As shown), terminal 1000 ( Figure 5 as shown) and anti-interference methods.

[0025] See also Figure 1 and Figure 2 The radio frequency system 100 provided in the present application includes a radio frequency signal transceiver 10, a 4G and 5G dual connectivity technology (E-UTRA NR Dual Connectivity, ENDC) platform 20, a GPS platform 30, an AND gate circuit 40 and a processor 50.

[0026] The radio frequency signal transceiver 10 is used to transmit and receive radio frequency signals.

[0027] The ENDC platform 20 includes a first transmission path 21, a second transmission path 23, a first power supply 25, and a second power supply 27. The first transmission path 21 is connected to the RF signal transceiver 10 and supports the transmission of a first-standard RF signal from a cellular antenna, and the first power supply 25 supplies power to the first transmission path 21. The second transmission path 23 is connected to the RF signal transceiver 10 and supports the transmission of a second-standard RF signal from a cellular antenna, and the second power supply 27 supplies power to the second transmission path 23.

[0028] The GPS platform 30 includes a GPS receiving circuit 31 and a third power source 33. The GPS receiving circuit 31 is connected to the RF signal transceiver 10, and is used to receive GPS RF signals and transmit the GPS RF signals to the RF signal transceiver 10. The third power source 33 supplies power to the GPS receiving circuit 31.

[0029] The AND gate circuit 40 is connected to the ENDC platform 20 and the GPS platform 30 and outputs a detection signal.

[0030] The processor 50 is connected to the AND gate circuit 40 and is used to: determine the working mode of the ENDC platform 20 and the on state of the GPS platform 30 according to the detection signal; when the ENDC platform 20 is in the ENDC working mode and the GPS platform 30 is on, detect whether the influence of the RF signal of the ENDC platform 20 on the GPS RF signal exceeds a preset range; and when the influence of the RF signal of the ENDC platform 20 on the GPS RF signal exceeds a preset range, control the switching of the currently working cellular antenna on the ENDC platform 20.

[0031] In the RF system 100 of the embodiment of the present application, when the ENDC platform 20 is in the ENDC working mode and the GPS platform 30 is turned on, if the influence of the RF signal of the ENDC platform 20 on the GPS RF signal exceeds a preset range, the control switches the currently working cellular antenna on the ENDC platform 20, thereby selecting a cellular antenna with a greater isolation from the GPS antenna in the GPS platform 30 to work, so that the intensity of the intermodulation signal entering the GPS antenna becomes smaller, thereby reducing or even eliminating the interference of the cellular signal on the GPS RF signal, thereby ensuring GPS performance.

[0032] In some embodiments, the RF system 100 may further include a memory 60, and the gate circuit 40 is connected to the processor 50 via the memory 60. The control signal of the processor 50 may be transmitted to the first switch 217 of the first transmitting path 21 and / or the second switch 237 of the second transmitting path 23 via the memory 60.

[0033] Please continue reading Figure 1 and Figure 2 In some embodiments, the processor 50 is also used to: obtain the respective operating frequency bands of multiple current cellular antennas that are currently operating, and the multiple operating frequency bands of the multiple current cellular antennas generate intermodulation signals; when the intermodulation signal is within a preset range of the GPS frequency band of the GPS radio frequency signal, obtain the target cellular antenna on each transmission path according to a preset isolation table; and control the current cellular antenna to switch to the target cellular antenna to operate.

[0034] The isolation table is a table pre-stored in the memory 60 of the radio frequency system 100, reflecting the isolation between each cellular antenna (cellular antenna 1 to cellular antenna n+m) and the GPS antenna, as shown in Table 1 below. Isolation refers to the ratio of the power of the local oscillator or radio frequency signal leaking to other ports to the input power, in dB. The isolation between antennas is different. For example, in the terminal 1000 ( Figure 5 As shown in FIG. 1 , if the two antennas are relatively close to each other, the isolation is relatively poor, and if the two antennas are relatively far away, the isolation is greater.

[0035] Table 1

[0036]

[0037] In addition, in the 5G enhanced mobile bandwidth (eMBB) application scenario, the geometrically increasing demand for massive data has put forward unprecedented requirements on the data communication capabilities of terminals. The two major deployment solutions of 5G NSA (non-standalone networking) and SA (standalone networking) have key solutions to improve the communication rate. For the terminal circuit, NSA (non-standalone networking) requires LTE and NR to work simultaneously. Figure 1 and Figure 2 In the RF system 100 of the illustrated embodiment, the first transmitting module 211 corresponds to LTE (i.e., transmitting RF signals of the first standard), has a first operating frequency band, and corresponds to the first antenna group 215. The first antenna group 215 has multiple cellular antennas that all operate in the first operating frequency band, for example, cellular antenna 1 to cellular antenna n all operate in the first operating frequency band fx. The second transmitting module 231 corresponds to NR (i.e., transmitting RF signals of the second standard), has a second operating frequency band, and corresponds to the second antenna group 235. The second antenna group 235 has multiple cellular antennas that all operate in the second operating frequency band, for example, cellular antenna n+1 to cellular antenna n+m all operate in the second operating frequency band fy. The first operating frequency band is different from the second operating frequency band, that is, fx≠fy. Figure 1 and Figure 2The RF system 100 of the illustrated embodiment includes only two transmitting modules, and correspondingly, there are also two cellular antennas currently in operation, for example, cellular antenna x1 and cellular antenna y1, where 1≤x1≤n, n+1≤y1≤n+m. Correspondingly, the operating frequency band of cellular antenna x1 is fx (first operating frequency band), and the operating frequency band of cellular antenna y1 is fy (second operating frequency band). In other embodiments, if the RF system 100 includes three or more transmitting modules, correspondingly, there are also three or more cellular antennas currently in operation, for example, taking three as an example, the currently operating ones are: cellular antenna x1, cellular antenna y1 and cellular antenna z1, and correspondingly, the operating frequency band of cellular antenna x1 is fx (first operating frequency band), the operating frequency band of cellular antenna y1 is fy (second operating frequency band), and the operating frequency band of cellular antenna z1 is fz (third operating frequency band). This article only takes two transmitting modules as an example for explanation, and the case where there are multiple transmitting modules can refer to two executions, which will not be repeated in this article.

[0038] Since the current 5G base station coverage is small, the number of 5G base stations required to cover the same area of ​​LTE is more than three times the number of base stations required to cover LTE, and the network construction cost has increased sharply. Due to uneven economic development around the world and different 4G to 5G evolution strategies in different countries, the ENDC solution will become an important 5G coverage solution for a long time around the world, that is, the use of 4G and 5G dual connection solutions to ensure signal continuity in areas where 5G signals are unstable or not covered.

[0039] ENDC is a dual connection of 4G and 5G. Currently, there are multiple frequency bands such as LB / MB / HB for LTE worldwide, and multiple frequency bands such as LB / MB / HB / SUB6G for 5G. In NSA ENDC mode, the LTE circuit and the NR circuit will work at the same time, which means that at the same time, there will be two frequency signals, namely the LTE signal fx and the NR signal fy. The frequency of the intermodulation signal generated by these two frequency signals is likely to fall near the working frequency band of the GPS platform (within the preset range of the GPS frequency band), thereby raising the background noise of the GPS platform and reducing GPS performance.

[0040] In the radio frequency system 100 of the present application, when the radio frequency system 100 is in the ENDC working mode and the GPS platform 30 is turned on, if the intermodulation signal is within the preset range of the GPS frequency band, the target cellular antenna corresponding to each working frequency band is obtained according to the preset isolation table and multiple working frequency bands, and the current cellular antenna is switched to the target cellular antenna for operation, thereby selecting the cellular antenna x2 (a cellular antenna with a greater isolation than the cellular antenna x1 and the GPS antenna) and the cellular antenna y2 (a cellular antenna with a greater isolation than the cellular antenna y1 and the GPS antenna) with a greater isolation from the GPS antenna in the GPS platform to work, so that the intensity of the intermodulation signal entering the GPS antenna becomes smaller, thereby reducing or even eliminating the interference of the cellular signal on the GPS radio frequency signal, thereby ensuring the GPS performance.

[0041] It should be noted that the intermodulation signal is within the preset range of the GPS frequency band, which means that the frequency of the intermodulation signal is within a predetermined small range of the frequency of the GPS frequency band. Assuming that the frequency of the GPS frequency band is fg, the preset range of the GPS frequency band may be (fg±100)MHZ, that is, if the frequency of the intermodulation signal falls within the range of (fg-100)MHZ (including this number) to (fg+100)MHZ (including this number), it indicates that the intermodulation signal is within the preset range of the GPS frequency band, which may interfere with the GPS radio frequency signal. In some embodiments, the preset range of the GPS frequency band is determined before leaving the factory based on numerous empirical values.

[0042] In some implementations, the processor 50 is further configured to control the current cellular antenna to continue operating when the intermodulation signal is outside a preset range of the GPS frequency band.

[0043] The intermodulation signal is outside the preset range of the GPS frequency band means that: the frequency of the intermodulation signal is outside the predetermined small range of the frequency of the GPS frequency band. Assuming that the frequency of the GPS frequency band is fg, the preset range of the GPS frequency band may be (fg±100)MHZ. That is, if the frequency of the intermodulation signal is less than (fg-100)MHZ or greater than (fg+100)MHZ, it indicates that the intermodulation signal is outside the preset range of the GPS frequency band and will not interfere with the GPS RF signal. The current cellular antenna continues to work to meet the requirements of the GPS RF signal and the cellular signal.

[0044] In some implementations, the processor 50 is further configured to determine whether the intermodulation signal is within a preset range of the GPS frequency band according to a preset intermodulation signal table and a plurality of operating frequency bands.

[0045] Among them, the intermodulation signal table is a table pre-stored in the memory 60 of the radio frequency system 100, reflecting whether the frequency of the intermodulation signal generated by multiple working frequency bands falls within the preset range of the GPS frequency band, as shown in Table 2 below. Usually, the first working frequency band 1 and the second working frequency band 2 are both known, for example, a and b respectively. Then, by looking up the intermodulation signal table, it can be known that the intermodulation signal is within the preset range of the GPS frequency band, indicating that the currently working cellular antenna needs to be switched. If the first working frequency band 1 and the second working frequency band 2 are e and f respectively, it means that there is no need to switch the currently working cellular antenna, and maintaining the currently working cellular antenna to continue working can satisfy both the GPS radio frequency signal and the wireless communication signal (4G signal and 5G signal).

[0046] Table 2

[0047] The first working frequency band 1 The first working frequency band 2 Does the intermodulation signal fall near the GPS frequency band? a b YES c d YES …… …… …… e f NO

[0048] In some implementations, the processor 50 is further configured to select a cellular antenna having the maximum isolation from the GPS antenna from among multiple cellular antennas corresponding to each working frequency band, as a target cellular antenna corresponding to the working frequency band.

[0049] Specifically, see also Figure 1 and Figure 2 In some embodiments, the first transmission path 21 may include a first transmission module 211, a first antenna group 215, and a first switch 217. The first antenna group 215 includes a plurality of first cellular antennas 2151, and the first transmission module 211 is conductively connected to the current first cellular antenna 2151 through the first switch 217. The second transmission path 23 includes a second transmission module 231, a second antenna group 235, and a second switch 237. The second antenna group 235 includes a plurality of second cellular antennas 2351, and the second transmission module 231 is conductively connected to the current second cellular antenna 2351 through the second switch 237.

[0050] The processor 50 is also used to: obtain the current working frequency band of the first cellular antenna 2151 and the current working frequency band of the second cellular antenna 2351, and the current working frequency band of the first cellular antenna 2151 and the current working frequency band of the second cellular antenna 2351 generate an intermodulation signal; when the intermodulation signal is within a preset range of the GPS frequency band, obtain the target first cellular antenna 2151 on the first transmission path 21 and the target second cellular antenna 2351 on the second transmission path 23 according to a preset isolation table; and control the first switch 217 to switch to conduction and connect the first transmission module 211 and the target first cellular antenna 2151, and control the second switch 237 to switch to conduction and connect the second transmission module 231 and the target second cellular antenna 2351.

[0051] More specifically, the first cellular antenna 2151 includes cellular antenna 1 to cellular antenna n, and the cellular antenna 1 to cellular antenna n in the first antenna group 215 all operate in the first operating frequency band. The first input end of the first switch 217 is connected to the first transmitting module 211, the second input end of the first switch 217 is connected to the third end of the memory 60, and the multiple output ends of the first switch 217 are respectively connected to the multiple first cellular antennas 2151.

[0052] The second cellular antenna 2351 includes cellular antenna n+1 to cellular antenna n+m, and the cellular antenna n+1 to cellular antenna n+m in the second antenna group 235 all operate in the second operating frequency band. The first input end of the second switch 237 is connected to the second transmitting module 231, the second input end of the second switch 237 is connected to the third end of the memory 60, and the multiple output ends of the second switch 237 are respectively connected to the multiple second cellular antennas 2351.

[0053] After the control signal output by the processor 50 passes through the memory 60, the first switch 217 is controlled to switch the current cellular antenna in the first working frequency band to the target cellular antenna for operation, and the second switch 237 is controlled to switch the current cellular antenna in the second working frequency band to the target cellular antenna for operation. Assume that the current cellular antennas are the cellular antenna x1 in the first antenna group 215 and the cellular antenna y1 in the second antenna group 235, wherein 1≤x1≤n, n+1≤y1≤n+m, the cellular antenna x1 corresponds to the first working frequency band fx, and the cellular antenna y1 corresponds to the first working frequency band fy. When the intermodulation signal is determined to be within the preset range of the GPS frequency band according to the preset intermodulation signal table and multiple working frequency bands, a cellular antenna with the maximum isolation from the GPS antenna is selected from the cellular antennas 1 to n in the first antenna group 215 as the target cellular antenna corresponding to the first working frequency band, assuming that it is cellular antenna x2; at the same time, a cellular antenna with the maximum isolation from the GPS antenna is selected from the cellular antennas n+1 to n+m in the second antenna group 235 as the target cellular antenna corresponding to the second working frequency band, assuming that it is cellular antenna y2. The control signal output by the processor 50 controls the first switch 217 to switch the cellular antenna x1 to the cellular antenna x2 for operation, and controls the second switch 237 to switch the cellular antenna y1 to the cellular antenna y2 for operation. Since cellular antenna x2 is the cellular antenna with the maximum isolation from the GPS antenna in the first working frequency band fx, and cellular antenna y2 is the cellular antenna with the maximum isolation from the GPS antenna in the second working frequency band fy, although cellular antenna x2 and cellular antenna y2 will still generate intermodulation signals, the intensity of the intermodulation signals entering the GPS antenna becomes smaller, thereby reducing or even eliminating the interference of cellular signals on GPS RF signals, thereby ensuring GPS performance.

[0054] It can be understood that in other embodiments, the processor 50 is not limited to selecting the cellular antenna with the maximum isolation with the GPS antenna from the multiple cellular antennas corresponding to each working frequency band as the target cellular antenna corresponding to the working frequency band. Alternatively, the processor 50 may select the cellular antenna with a greater isolation with the GPS antenna than the original one (greater than the isolation between the currently working cellular antenna and the GPS) from the multiple cellular antennas corresponding to each working frequency band as the target cellular antenna corresponding to the working frequency band.

[0055] The working modes of the radio frequency system 100 include an ENDC working mode and a non-ENDC working mode. In other words, the ENDC platform 20 can be in an ENDC working mode and a non-ENDC working mode. The radio frequency system 100 of the present application is implemented by the AND gate circuit 40 cooperating with the processor 50 to determine which mode the ENDC platform 20 is in.

[0056] Specifically, see Figure 1 In some embodiments, the AND gate circuit 40 may include a first AND gate 41 and a second AND gate 43. The first AND gate 41 is connected between the first transmitting path 21 and the second transmitting path 23. The second AND gate 43 is connected between the GPS platform 30 and the first AND gate 41, and the second AND gate 43 outputs a detection signal to the processor 50. When the detection signal is a first preset signal, the processor 50 determines that the ENDC platform 20 is in the ENDC working mode and the GPS platform 30 is turned on.

[0057] More specifically, a first input end of the first AND gate 41 is connected between the first power supply 25 and the first transmitting module 211, and a second input end of the first AND gate 41 is connected between the second power supply 27 and the second transmitting module 231. A first input end of the second AND gate 43 is connected to an output end of the first AND gate 41, a second input end of the second AND gate 43 is connected between the third power supply 33 and the GPS receiving circuit 31, an output end of the second AND gate 43 is connected to a first end of the memory 60, a second end of the memory 60 is connected to the processor 50, and a third end of the memory 60 is connected to both the first switch 217 and the second switch 237.

[0058] Among them, the first preset signal can be a high-level signal. That is, the signal output by the output end (the end connected to the memory 60) of the second AND gate 43 is a high-level signal, which can determine that the radio frequency system 100 is in the ENDC working mode and the GPS platform 30 is turned on, that is, the first transmitting module 211, the second transmitting module 231, and the GPS platform 30 are all in working state. Of course, the first preset signal can also be embodied in other forms, for example, the first preset signal can also be a low-level signal.

[0059] The radio frequency system 100 of this embodiment sets the first AND gate 41 and the second AND gate 43, and designs the connection relationship and layout of the first AND gate 41 and the second AND gate 43 in the radio frequency system 100, so that by reading the signal at the output end of the second AND gate 43, it is possible to know whether the GPS platform 30 is in the ENDC working mode and whether the GPS platform 30 is turned on. As a pre-program for subsequent detection of whether the influence of the radio frequency signal of the ENDC platform 20 on the GPS radio frequency signal exceeds a preset range, there is no need to make too many switching designs in the process. The pre-program is simple and convenient, thereby improving the overall execution efficiency of resisting the interference of the radio frequency signal of the cellular antenna on the GPS radio frequency signal in the radio frequency system 100.

[0060] See also Figure 2 In some other embodiments, the AND gate circuit 40 may further include an AND gate 45, which is connected between the GPS platform 30 and the second transmitting path 23. The AND gate 45 outputs a detection signal to the processor 50. When the detection signal is the second preset signal and the processor 50 self-checks that it is the third preset signal, the processor 50 determines that the ENDC platform 20 is in the ENDC working mode and the GPS platform 30 is turned on.

[0061] More specifically, in some embodiments, a first input terminal of the AND gate 45 is connected between the second transmitting module 231 and the second power supply 27, a second input terminal of the AND gate 45 is connected between the third power supply 33 and the GPS platform 30, an output terminal of the AND gate 45 is connected to a first terminal of the memory 60, a second terminal of the memory 60 is connected to the processor 50, and a third terminal of the memory 60 is connected to both the first switch 217 and the second switch 237.

[0062] Among them, both the second preset signal and the third preset signal can be high-level signals. That is, the signal output by the output end (the end connected to the memory 60) of the AND gate 45 is a high-level signal, which can determine that the second transmitting module 231 is in working state and the GPS platform is turned on, but it is not certain whether the first transmitting module 211 is in working state. Therefore, the processor 50 needs to self-check to determine that the radio frequency system 100 is in ENDC mode. Specifically, after the memory 60 receives the second preset signal (high-level signal), it will be transmitted to the processor 50, and the processor 50 will start to perform self-check. If the third preset signal is obtained after the self-check, it can be determined that the radio frequency system 100 is in ENDC mode. Of course, the second preset signal and the third preset signal can also be embodied in other forms, for example, the second preset signal and the third preset signal can also be low-level signals, etc., which are not limited here.

[0063] In the radio frequency system 100 of the present embodiment, only one AND gate 45 is provided, and the connection relationship and layout of the AND gate 45 in the radio frequency system 100 are designed, so that by reading the signal at the output end of the AND gate 45 and starting the self-test program of the processor 50, it is possible to know whether the radio frequency system 100 is in the ENDC working mode and whether the GPS platform 30 is turned on. As a pre-program for subsequent detection of whether the influence of the radio frequency signal of the ENDC platform 20 on the GPS radio frequency signal exceeds a preset range, there is no need to provide two AND gates, and the circuit structure is simplified, thereby simplifying the structure of the radio frequency system 100 and saving costs.

[0064] Please continue reading Figure 1 and Figure 2 In some embodiments, the architecture of the GPS platform 30 is pre-saw+LNA+postsaw, that is, the GPS platform 30 includes a GPS antenna, a first filter 311 (pre-saw), an amplifier 313, and a second filter 315 (post-saw). The first filter 311, the amplifier 313, and the second filter 315 are sequentially connected between the GPS antenna and the RF signal transceiver 10. The first filter 311 is used to protect the amplifier 313 and to suppress signals outside the GPS frequency band. The amplifier 313 is a low-noise amplifier for amplifying the received signal. The second filter 315 is used to protect the RF signal transceiver 10 and to suppress signals outside the GPS frequency band.

[0065] In the radio frequency system 100 of the embodiment of the present application, by setting the architecture of the GPS platform 30 to pre-saw+LNA+post-saw, on the one hand, the signals outside the GPS frequency band are suppressed, further reducing the interference of the cellular signal on the GPS radio frequency signal, thereby ensuring the GPS performance from the reverse direction; on the other hand, the signals in the GPS frequency band are amplified, thereby ensuring the GPS performance from the forward direction.

[0066] See also Figure 1 and Figure 3 The present application also provides an anti-interference method, which is used in the radio frequency system 100 of any of the above embodiments. The anti-interference method includes:

[0067] 01: Determine the working mode of the ENDC platform 20 and the start-up state of the GPS platform 30 according to the detection signal output by the AND gate circuit 40;

[0068] 03: When the ENDC platform 20 is in the ENDC working mode and the GPS platform 30 is turned on, detecting whether the influence of the RF signal of the ENDC platform 20 on the GPS RF signal exceeds a preset range; and

[0069] 05: When the influence of the radio frequency signal of the ENDC platform 20 on the GPS radio frequency signal exceeds a preset range, control switching of the currently working cellular antenna on the ENDC platform 20.

[0070] See also Figure 1 and Figure 4 In some embodiments, 03: detecting whether the influence of the radio frequency signal of the ENDC platform 20 on the GPS radio frequency signal exceeds a preset range, including:

[0071] Acquire respective working frequency bands of multiple current cellular antennas currently in operation, where the multiple working frequency bands of the multiple current cellular antennas generate intermodulation signals; and

[0072] In the case where the intermodulation signal is within the preset range of the GPS frequency band of the GPS radio frequency signal, it is determined that the influence of the radio frequency signal of the ENDC platform 20 on the GPS radio frequency signal exceeds the preset range.

[0073] Please continue reading Figure 1 and Figure 4 In some embodiments, 05: controlling the switching of the currently working cellular antenna on the ENDC platform 20 includes:

[0074] 051: Obtain the target cellular antenna on each transmission path according to a preset isolation table; and

[0075] 053: Control the current cellular antenna to switch to the target cellular antenna.

[0076] In the anti-interference method of the present application, when the radio frequency system 100 is in the ENDC working mode and the GPS platform 30 is turned on, if the intermodulation signal is within the preset range of the GPS frequency band, the target cellular antenna corresponding to each working frequency band is obtained according to the preset isolation table and multiple working frequency bands, and the current cellular antenna is switched to the target cellular antenna for operation, thereby selecting the cellular antenna x2 (a cellular antenna with a greater isolation than the cellular antenna x1 and the GPS antenna) and the cellular antenna y2 (a cellular antenna with a greater isolation than the cellular antenna y1 and the GPS antenna) with a greater isolation from the GPS antenna in the GPS platform to work, so that the intensity of the intermodulation signal entering the GPS antenna becomes smaller, thereby reducing or even eliminating the interference of the cellular signal on the GPS radio frequency signal, thereby ensuring GPS performance.

[0077] The terminal 1000 may be, but is not limited to, a mobile phone, a tablet (PAD), a notebook computer, a handheld game console, or other device with GPS and mobile communication functions. Figure 5 The example in which the terminal 1000 is a mobile phone is used only, but the present invention is not limited to the case in which the terminal 1000 is a mobile phone.

[0078] See also Figure 5 The terminal 1000 provided in the present application includes the radio frequency system 100 and the main body 200 of any one of the above-mentioned embodiments, and the radio frequency system 100 is installed in the main body 200.

[0079] Please combine Figure 1 or Figure 2 In the terminal 1000 of the present application, when the ENDC platform 20 is in the ENDC working mode and the GPS platform 30 is turned on, if the intermodulation signal is within the preset range of the GPS frequency band, the target cellular antenna corresponding to each working frequency band will be obtained according to the preset isolation table and multiple working frequency bands, and the current cellular antenna will be switched to the target cellular antenna for operation, thereby selecting the cellular antenna x2 (a cellular antenna with a greater isolation than the cellular antenna x1 and the GPS antenna) and the cellular antenna y2 (a cellular antenna with a greater isolation than the cellular antenna y1 and the GPS antenna) with a greater isolation from the GPS antenna in the GPS platform to work, so that the intensity of the intermodulation signal entering the GPS antenna becomes smaller, thereby reducing or even eliminating the interference of the cellular signal to the GPS radio frequency signal, thereby ensuring the GPS performance.

[0080] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0081] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0082] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A radio frequency system, characterized in that: include: A radio frequency signal transceiver, used for transmitting and receiving radio frequency signals; The ENDC platform comprises a first transmitting path, a second transmitting path, a first power supply and a second power supply, wherein the first transmitting path is connected to the radio frequency signal transceiver and supports the transmission of a radio frequency signal of a first standard from a cellular antenna, and the first power supply supplies power to the first transmitting path; the second transmitting path is connected to the radio frequency signal transceiver and supports the transmission of a radio frequency signal of a second standard from a cellular antenna, and the second power supply supplies power to the second transmitting path; The GPS platform comprises a GPS receiving circuit and a third power supply, wherein the GPS receiving circuit is connected to the radio frequency signal transceiver and is used to receive GPS radio frequency signals and transmit the GPS radio frequency signals to the radio frequency signal transceiver, and the third power supply supplies power to the GPS receiving circuit; An AND gate circuit is connected to the ENDC platform and the GPS platform and outputs a detection signal, and the AND gate circuit includes: A first AND gate connected between the first transmitting path and the second transmitting path; and A second AND gate connected between the GPS platform and the first AND gate; and A processor is connected to the AND gate circuit and is used to: Determining the working mode of the ENDC platform and the start-up state of the GPS platform according to the detection signal; When the ENDC platform is in the ENDC working mode and the GPS platform is turned on, detecting whether the influence of the ENDC platform's radio frequency signal on the GPS radio frequency signal exceeds a preset range; and When the influence of the RF signal of the ENDC platform on the GPS RF signal exceeds the preset range, the currently working cellular antenna on the ENDC platform is controlled to switch, and the second AND gate outputs the detection signal to the processor. When the detection signal is the first preset signal, the processor determines that the ENDC platform is in the ENDC working mode and the GPS platform is turned on.

2. The radio frequency system according to claim 1, characterized in that: The processor is further configured to: Acquire respective working frequency bands of a plurality of current cellular antennas currently in operation, wherein the plurality of working frequency bands of the plurality of current cellular antennas generate intermodulation signals; When the intermodulation signal is within a preset range of the GPS frequency band of the GPS radio frequency signal, obtaining a target cellular antenna on each transmission path according to a preset isolation table; and Control the current cellular antenna to switch to the target cellular antenna to work.

3. The radio frequency system according to claim 2, characterized in that: The first transmission path includes a first transmission module, a first antenna group and a first switch, the first antenna group includes a plurality of first cellular antennas, and the first transmission module is conductively connected to the current first cellular antenna through the first switch; the second transmission path includes a second transmission module, a second antenna group and a second switch, the second antenna group includes a plurality of second cellular antennas, and the second transmission module is conductively connected to the current second cellular antenna through the second switch; the processor is further configured to: Acquire a current working frequency band of the first cellular antenna and a current working frequency band of the second cellular antenna, wherein the current working frequency band of the first cellular antenna and the current working frequency band of the second cellular antenna generate the intermodulation signal; When the intermodulation signal is within a preset range of the GPS frequency band, obtaining a target first cellular antenna on the first transmission path and a target second cellular antenna on the second transmission path according to a preset isolation table; and The first switch is controlled to switch to connect the first transmitting module with the target first cellular antenna, and the second switch is controlled to switch to connect the second transmitting module with the target second cellular antenna.

4. The radio frequency system according to claim 2 or 3, characterized in that: The processor is further configured to: When the intermodulation signal is outside the preset range of the GPS frequency band, the current cellular antenna is controlled to continue working.

5. The radio frequency system according to claim 1, characterized in that: The radio frequency system also includes: A memory, wherein the AND gate circuit is connected to the processor via the memory, and a control signal of the processor is transmitted to the first switch of the first transmitting path and / or the second switch of the second transmitting path via the memory.

6. The radio frequency system according to claim 5, characterized in that: The first input end of the first AND gate is connected between the first power supply and the first transmitting module, and the second input end of the first AND gate is connected between the second power supply and the second transmitting module; the first input end of the second AND gate is connected to the output end of the first AND gate, and the second input end of the second AND gate is connected between the third power supply and the GPS receiving circuit, the output end of the second AND gate is connected to the first end of the memory, the second end of the memory is connected to the processor, and the third end of the memory is connected to both the first switch and the second switch.

7. A radio frequency system, characterized in that: include: A radio frequency signal transceiver, used for transmitting and receiving radio frequency signals; The ENDC platform comprises a first transmitting path, a second transmitting path, a first power supply and a second power supply, wherein the first transmitting path is connected to the radio frequency signal transceiver and supports the transmission of a radio frequency signal of a first standard from a cellular antenna, and the first power supply supplies power to the first transmitting path; the second transmitting path is connected to the radio frequency signal transceiver and supports the transmission of a radio frequency signal of a second standard from a cellular antenna, and the second power supply supplies power to the second transmitting path; The GPS platform comprises a GPS receiving circuit and a third power supply, wherein the GPS receiving circuit is connected to the radio frequency signal transceiver and is used to receive GPS radio frequency signals and transmit the GPS radio frequency signals to the radio frequency signal transceiver, and the third power supply supplies power to the GPS receiving circuit; an AND gate circuit connected to the ENDC platform and the GPS platform and outputting a detection signal, wherein the AND gate circuit comprises an AND gate connected between the GPS platform and the second transmitting path; and A processor is connected to the AND gate circuit and is used to: Determining the working mode of the ENDC platform and the start-up state of the GPS platform according to the detection signal; When the ENDC platform is in the ENDC working mode and the GPS platform is turned on, detecting whether the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds a preset range; and When the influence of the RF signal of the ENDC platform on the GPS RF signal exceeds the preset range, the currently working cellular antenna on the ENDC platform is controlled to switch, and the AND gate outputs the detection signal to the processor. When the detection signal is the second preset signal and the processor self-checks the third preset signal, the processor determines that the ENDC platform is in the ENDC working mode and the GPS platform is turned on.

8. The radio frequency system according to claim 7, characterized in that: The processor is further configured to: Acquire respective working frequency bands of a plurality of current cellular antennas currently in operation, wherein the plurality of working frequency bands of the plurality of current cellular antennas generate intermodulation signals; When the intermodulation signal is within a preset range of the GPS frequency band of the GPS radio frequency signal, obtaining a target cellular antenna on each transmission path according to a preset isolation table; and Control the current cellular antenna to switch to the target cellular antenna to work.

9. The radio frequency system according to claim 7, characterized in that: The radio frequency system also includes: A memory, wherein the AND gate is connected to the processor via the memory, and a control signal of the processor is transmitted to the first switch of the first transmitting path and / or the second switch of the second transmitting path via the memory.

10. The radio frequency system according to claim 9, characterized in that: The first input end of the AND gate is connected between the second transmitting module and the second power supply, the second input end of the AND gate is connected between the third power supply and the GPS platform, the output end of the AND gate is connected to the first end of the memory, the second end of the memory is connected to the processor, and the third end of the memory is connected to both the first switch and the second switch.

11. A terminal, characterized in that: include: The radio frequency system according to any one of claims 1 to 10; and The main body is provided with the radio frequency system installed on the main body.

12. An anti-interference method, used in the radio frequency system according to any one of claims 1 to 10, characterized in that: The anti-interference method comprises: Determining the working mode of the ENDC platform and the start-up state of the GPS platform according to the detection signal output by the AND gate circuit; When the ENDC platform is in the ENDC working mode and the GPS platform is turned on, detecting whether the influence of the ENDC platform's radio frequency signal on the GPS radio frequency signal exceeds a preset range; and When the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds the preset range, control is performed to switch the currently working cellular antenna on the ENDC platform.

13. The anti-interference method according to claim 12, characterized in that: The ENDC platform includes a first transmission path, a second transmission path, a first power supply and a second power supply, wherein the first transmission path is connected to the RF signal transceiver and supports the transmission of a RF signal of a first standard from a cellular antenna, and the first power supply supplies power to the first transmission path; the second transmission path is connected to the RF signal transceiver and supports the transmission of a RF signal of a second standard from a cellular antenna, and the second power supply supplies power to the second transmission path; The detecting whether the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds a preset range includes: Acquire respective working frequency bands of a plurality of current cellular antennas currently in operation, wherein the plurality of working frequency bands of the plurality of current cellular antennas generate intermodulation signals; and In the case where the intermodulation signal is within a preset range of the GPS frequency band of the GPS radio frequency signal, it is determined that the influence of the radio frequency signal of the ENDC platform on the GPS radio frequency signal exceeds the preset range.

14. The anti-interference method according to claim 13, characterized in that: The controlling and switching of the currently working cellular antenna on the ENDC platform includes: Obtaining a target cellular antenna on each transmission path according to a preset isolation table; and Control the current cellular antenna to switch to the target cellular antenna to work.

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