Radio frequency front-end circuit, electronic device, working bandwidth switching method and device

Abstract

The embodiment of the present application discloses a radio frequency front-end circuit, wherein the first transceiver is a signal transceiver of a Beidou satellite, the second transceiver is a signal transceiver of a GPS satellite, the second filter is a frequency hopping filter, the first receiving end of the first transceiver is connected to the first output end of the first switch, the second receiving end of the first transceiver is connected to the second output end of the first switch, the receiving end of the second transceiver is connected to the output end of the first filter, the input end of the first filter is connected to the third output end of the first switch, the control end of the first switch is connected to the output end of a low noise amplifier, the input end of the low noise amplifier is connected to the output end of the second filter, the input end of the second filter is connected to an antenna, and the radio frequency front-end circuit is used to receive signals from Beidou satellites or GPS satellites. The embodiment of the present application also provides an electronic device, a method and a device for switching working bandwidth.

Description

Technical Field

[0001] The present application relates to radio frequency front-end technology, and in particular to a radio frequency front-end circuit, electronic equipment, and a method and device for switching working bandwidth. Background Art

[0002] At present, the BeiDou Satellite Navigation System (BDS) is a global satellite navigation system independently developed by China, which has a two-way communication function, allowing two-way data transmission between ground equipment and satellites and between different ground equipment. This communication method is not limited to positioning and navigation, but can also realize the sending and receiving of short messages, thus providing a means of communication in areas without network coverage.

[0003] However, in the Beidou satellite system, a large number of devices are used in the receiving path, which results in a large space being occupied by electronic equipment and is not conducive to the miniaturization of the RF front-end circuit. Summary of the invention

[0004] The embodiments of the present application provide a radio frequency front-end circuit, an electronic device, a method for switching a working bandwidth, and a device, which can reduce the number of components in the radio frequency front-end circuit to reduce the occupied space in the electronic device.

[0005] The technical solution of this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a radio frequency front-end circuit, including: a first transceiver, a second transceiver, a first filter, a first switch, a low noise amplifier, a second filter and an antenna, wherein the first transceiver is a signal transceiver of a Beidou satellite, and the second transceiver is a signal transceiver of a GPS satellite; the second filter is a frequency hopping filter; wherein,

[0007] The first receiving end of the first transceiver is connected to the first output end of the first switch, the second receiving end of the first transceiver is connected to the second output end of the first switch, the receiving end of the second transceiver is connected to the output end of the first filter, the input end of the first filter is connected to the third output end of the first switch, the control end of the first switch is connected to the output end of the low noise amplifier, the input end of the low noise amplifier is connected to the output end of the second filter, and the input end of the second filter is connected to the antenna;

[0008] The RF front-end circuit is used to receive signals from Beidou satellites or GPS satellites.

[0009] In a second aspect, an embodiment of the present application provides an electronic device, comprising a radio frequency front-end circuit as described in one or more of the above embodiments.

[0010] In a third aspect, an embodiment of the present application provides a method for switching a working bandwidth, which is applied to the electronic device described in one or more of the above embodiments, including:

[0011] Determine operating parameters of electronic equipment for satellite communications;

[0012] Determining a target operating bandwidth of the second filter according to the operating parameters;

[0013] The operating bandwidth of the second filter is switched to a target operating bandwidth.

[0014] In a fourth aspect, an embodiment of the present application provides a working bandwidth switching device, which is provided in the electronic device as described in one or more of the above embodiments, including:

[0015] A first determination module is used to determine the working parameters of the electronic device for satellite communication;

[0016] A second determination module, used to determine a target operating bandwidth of the second filter according to the operating parameters;

[0017] The switching module is used to switch the working bandwidth of the second filter to the target working bandwidth.

[0018] In a fifth aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a storage medium storing instructions executable by the processor; the storage medium relies on the processor to perform operations through a communication bus, and when the instructions are executed by the processor, the working bandwidth switching method described in one or more of the above embodiments is executed.

[0019] In a sixth aspect, an embodiment of the present application provides a computer storage medium storing executable instructions. When the executable instructions are executed by one or more processors, the processors execute the working bandwidth switching method described in one or more of the above embodiments.

[0020] The embodiment of the present application provides a radio frequency front-end circuit, an electronic device, and a method and device for switching a working bandwidth, including: a first transceiver, a second transceiver, a first filter, a first switch, a low noise amplifier, a second filter and an antenna, wherein the first transceiver is a signal transceiver for a Beidou satellite, and the second transceiver is a signal transceiver for a GPS satellite; the second filter is a frequency hopping filter, the first receiving end of the first transceiver is connected to the first output end of the first switch, the second receiving end of the first transceiver is connected to the second output end of the first switch, the receiving end of the second transceiver is connected to the output end of the first filter, the input end of the first filter is connected to the third output end of the first switch, the control end of the first switch is connected to the output end of the low noise amplifier, the input end of the low noise amplifier is connected to the output end of the second filter, the input end of the second filter is connected to the antenna, and the radio frequency front-end circuit is used to receive a signal from a Beidou satellite or a signal from a GPS satellite; that is, in the embodiment of the present application, the receiving link of the Beidou satellite is merged with the receiving path of the GPS satellite, thereby reducing the number of low noise amplifiers and filters, thereby reducing the number of components in the radio frequency front-end circuit and reducing the space occupied by the radio frequency front-end circuit in the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a radio frequency front-end circuit in the related art;

[0022] Figure 2 A schematic diagram of the structure of an optional radio frequency front-end circuit provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of an optional electronic device provided in an embodiment of the present application Figure 1 ;

[0024] Figure 4 A schematic flow chart of an optional working bandwidth switching method provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the structure of an example of an optional radio frequency front-end circuit provided in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the structure of an optional working bandwidth switching device provided in an embodiment of the present application;

[0027] Figure 7 A schematic diagram of an optional electronic device provided in an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0029] Figure 1 is a schematic diagram of the structure of the RF front-end circuit in the related art, such as Figure 1 As shown, the RF front-end circuit 100 includes: a transmitting link and three receiving links, one transmitting link is the L-band transmitting link (BDS_TX-L) of the Beidou satellite, which is composed of the L-band transmitting end (RFOUT_L) of the Beidou satellite transceiver X801, the filter (Fliter) 11, the amplifier circuit, the single-pole 4-throw switch (Single Pole 4Throw, SP4T) and the antenna (ANT) 12 connected in sequence; the three receiving links include: the L-band receiving link of the Beidou satellite, the L1 band receiving link of the global positioning system (GPS) satellite and the S-band receiving link of the Beidou satellite (BDS_RX-S), wherein the L-band receiving link of the Beidou satellite and the L1 band receiving link of the GPS satellite share the filter and LNA (GPS L1&BDS L).

[0030] Among them, GPS L1&BDS L is composed of the L-band receiving end (RFIN_L) of the Beidou satellite transceiver X801 and the GPS transceiver MT6686_GNSS_IN_L1, combiner 16, single pole double throw (SPDT), low noise amplifier (Electronic Low Noise Amplifier, eLNA) 14, Post surface acoustic wave filter (surfaceacoustic wave, SAW), combiner 17, SP4T and ANT12 connected in sequence. BDS_RX-S is composed of the S-band receiving end (RFIN_S) of the Beidou satellite transceiver X801, Filter12, eLNA12, Filter13, SP4T and ANT12 connected in sequence.

[0031] The above-mentioned ANT12 can receive GPS L1 signals, BT1 signals, Wireless Fidelity (Wi-Fi) 2.4G signals, CH0 signals and BDS signals.

[0032] By the above Figure 1 It can be seen that in the receiving solution of the Beidou satellite system hardware, the GPS-L1 band is used for satellite positioning, the L band of the Beidou satellite system is used to calibrate the frequency deviation, and after completion, the S band of the Beidou satellite system is used to receive signals for short message services. In the receiving solution, the L1 band / L band and the S band take two different paths, so the RF front-end solution requires two LNAs and three filters.

[0033] The L1 band / L band and S band of the above receiving solution require two hardware paths, two LNAs, and three filters, which increases the hardware cost and the area of ​​the main board and is not conducive to miniaturization.

[0034] In view of the technical problem that the RF front-end circuit in the Beidou satellite system uses a large number of devices, which results in a large space occupied by electronic equipment, the embodiment of the present application provides a RF front-end circuit. Figure 2 A schematic diagram of the structure of an optional RF front-end circuit provided in an embodiment of the present application, such as Figure 2 As shown, the RF front-end circuit 200 may include: a first transceiver 21, a second transceiver 22, a first filter 23, a first switch 24, a low noise amplifier 25, a second filter 26 and an antenna 27. The first transceiver 21 is a signal transceiver for Beidou satellites, and the second transceiver 22 is a signal transceiver for GPS satellites; the second filter 23 is a frequency hopping filter; wherein,

[0035] The first receiving end 211 of the first transceiver 21 is connected to the first output end 241 of the first switch 24, the second receiving end 212 of the first transceiver 21 is connected to the second output end 242 of the first switch 24, the receiving end 221 of the second transceiver 22 is connected to the output end 231 of the first filter 23, the input end 232 of the first filter 23 is connected to the third output end 243 of the first switch 24, the control end 244 of the first switch 24 is connected to the output end 251 of the low noise amplifier 25, the input end 252 of the low noise amplifier 25 is connected to the output end 261 of the second filter 26, and the input end of the second filter 262 is connected to the antenna 27;

[0036] The RF front-end circuit 200 is used to receive signals from Beidou satellites or signals from global positioning system GPS satellites.

[0037] In the embodiment of the present application, the RF front-end circuit 200 includes three receiving links in total. The first receiving link is: antenna 27 -> second filter 26 -> low noise amplifier 25 -> first output end 241 of the first switch 24 -> first receiving end 211 of the first transceiver 21. In this way, the formed receiving link enables the first receiving end 211 of the first transceiver 21 to receive satellite signals.

[0038] The second receiving link is: antenna 27 -> second filter 26 -> low noise amplifier 25 -> second output end 242 of first switch 24 -> second receiving end 212 of first transceiver 21. Thus, the formed receiving link enables the second receiving end 212 of first transceiver 21 to receive satellite signals.

[0039] The third receiving link is: antenna 27 -> second filter 26 -> low noise amplifier 25 -> third output terminal 243 of first switch 24 -> first filter 23 -> receiving terminal 221 of second transceiver 22. In this way, the formed receiving link enables the receiving terminal 221 of the second transceiver 22 to receive satellite signals.

[0040] Among them, the above-mentioned second filter is a frequency hopping filter, and the frequency hopping filter has at least three working bandwidths, and the three working bandwidths are the working bandwidths in the above-mentioned three receiving links. For example, the first receiving link receives satellite signals in the first band, so the working bandwidth of the second filter is the first band, the second receiving link receives satellite signals in the second band, so the working bandwidth of the second filter is the second band, and the third receiving link receives satellite signals in the first frequency band, so the working bandwidth of the second filter is the first frequency band.

[0041] The switching of the working bandwidth of the second filter may be implemented by a processor of the electronic device, or may be completed by an independent control device of the electronic device, and this is specifically limited in the embodiments of the present application.

[0042] In addition, the first filter and the second filter are used to filter the received satellite signals, the low noise amplifier is used to reduce noise and amplify the received satellite signals, and the first switch is used to switch the control end so that the first transceiver or the second transceiver receives the satellite signals.

[0043] It should be noted that the above-mentioned first switch can be SP4T, and the control of the control end of the first switch can be implemented by a processor of the electronic device, or can be completed by an independent control device of the electronic device. Here, the embodiment of the present application specifically limits this.

[0044] The first transceiver mentioned above is a transceiver for Beidou satellites, and the second transceiver is a transceiver for GPS. It can be seen that in the RF front-end circuit 200, two filters, a low-noise amplifier and a switch are set to receive signals from Beidou satellites or GPS satellites, thereby reducing the number of components in the RF front-end circuit and reducing the space occupied by the circuit in electronic equipment.

[0045] Regarding the antenna in the above-mentioned RF front-end circuit, in addition to being able to receive the above-mentioned at least three satellite signals, in an optional embodiment, the RF front-end circuit further includes: a combiner; wherein,

[0046] The input end of the combiner is connected to the antenna, the first output end of the combiner is connected to the input end of the second filter, and the second output end of the combiner is connected to the antenna so as to receive a receiving link of a preset frequency band.

[0047] It can be understood that a combiner is set in the RF front-end circuit, the input end of the combiner is connected to the antenna, and one output end of the combiner, that is, the first output end, is connected to the input end of the second filter, so that the above three receiving links can receive satellite signals through the antenna.

[0048] Another output end of the combiner, i.e., the second output end, is connected to a receiving link of a preset frequency band, wherein the preset frequency band is a frequency band other than the first frequency band, the second frequency band, and the first frequency band. That is to say, the combiner can output the signal received from the antenna to the above three receiving links, and can also output it to receiving links of frequency bands other than the first frequency band, the second frequency band, and the first frequency band, so that more receiving links can share one antenna, saving the number of components of the RF front-end circuit and reducing the space occupied by the RF front-end circuit in electronic equipment.

[0049] For example, the receiving link of the other frequency bands may be a receiving link of Wi-Fi 2.4G.

[0050] In this way, the RF front-end circuit can not only receive signals in the Beidou satellite band and the GPS satellite band, but also receive signals in other frequency bands, so that more receiving links can share the antenna, reducing the space occupied by the RF front-end circuit in the electronic device.

[0051] In view of the fact that the antenna in the above-mentioned RF front-end circuit can not only receive signals but also transmit signals, in an optional embodiment, the RF front-end circuit further includes: a second switch; wherein,

[0052] The control end of the second switch is connected to the antenna, the first output end of the second switch is connected to the input end of the combiner, and the second output end of the second switch is connected to a transmission link of a preset frequency band that can be received by the antenna.

[0053] It can be understood that a second switch is also provided in the RF front-end circuit, the control end of the second switch is connected to the antenna, and one of the two output ends of the first switch is connected to the input end of the combiner, so that the above three receiving links can receive signals and can receive signals in the above preset frequency band.

[0054] The other output end is connected to the transmission link of the preset frequency band, that is, the first switch can output the signal received from the antenna to the above three receiving links or the receiving link of the preset frequency band, and can also transmit the signals in the transmission links of frequency bands other than the first band, the second band and the first frequency band, so that the transmission links can share one antenna, saving the number of components in the RF front-end circuit and reducing the space occupied by the RF front-end circuit in the electronic device.

[0055] In this way, in addition to receiving satellite signals or signals in a preset frequency band, the RF front-end circuit can also transmit signals in a preset frequency band, so that the receiving link and the transmitting link can share the antenna, further reducing the space occupied by the RF front-end circuit in the electronic device.

[0056] With respect to the second switch mentioned above, in an optional embodiment, the second switch is SPDT.

[0057] It can be understood that the use of SPDT enables the RF front-end circuit to not only receive satellite signals or signals in the preset frequency band, but also transmit signals in the preset frequency band. At the same time, the insertion loss of SPDT is small, which can reduce the insertion loss of the RF front-end circuit and improve the performance of the RF front-end circuit.

[0058] When the above-mentioned RF front-end circuit receives a satellite signal through the first transceiver, in an optional embodiment, the signal receiving end of the first band of the first transceiver is connected to the first output end of the first switch; wherein,

[0059] When the control end of the first switch is connected to the first output end of the first switch and the control end of the second switch is connected to the first output end of the second switch, the antenna is used to receive the signal of the first band, the second filter is used to filter the signal of the first band according to the working bandwidth of the first band, the low noise amplifier is used to perform noise reduction and amplifier processing on the filtered signal, and the first transceiver is used to receive the processed signal through the receiving end of the first band.

[0060] It can be understood that the control end of the first switch is connected to the first output end of the first switch, and the control end of the second switch is connected to the first output end of the second switch, and the receiving link formed is the above-mentioned first receiving link, so that the first transceiver can receive the satellite signal of the first band.

[0061] In practical applications, the first band may be an L band, and the first receiving link is used to receive satellite signals in the L band, wherein the satellite signals in the L band are used to calibrate frequency deviation.

[0062] It should be noted that when the first receiving link receives L-band satellite signals, the working bandwidth of the second filter needs to be adjusted to the first band, so that the second filter can filter out signals outside the first band.

[0063] In this way, the RF front-end circuit can receive satellite signals in the first band when the first receiving link is connected, and the satellite signals in the first band can still be received while reducing the occupied space of the RF front-end circuit.

[0064] In addition, when the above-mentioned RF front-end circuit receives satellite signals through the first transceiver, in an optional embodiment, the signal receiving end of the second band of the first transceiver is connected to the second output end of the first switch; wherein,

[0065] When the control end of the first switch is connected to the second output end of the first switch and the control end of the second switch is connected to the first output end of the second switch, the antenna is used to receive the signal of the second band, the second filter is used to perform a first filtering on the signal of the second band according to the second band, the low noise amplifier is used to perform noise reduction and amplifier processing on the filtered signal, the first filter is used to perform a second filtering on the processed signal, and the first transceiver is used to receive the second filtered signal through the signal receiving end of the second band.

[0066] It can be understood that the control end of the first switch is connected to the second output end of the first switch, and the control end of the second switch is connected to the first output end of the second switch, and the receiving link formed is the above-mentioned second receiving link, so that the first transceiver can receive satellite signals in the second band.

[0067] In practical applications, the second band may be the S band, and the second receiving link is used to receive S band satellite signals, wherein the S band satellite signals are used to realize communication between the terminal and the Beidou satellite, or to realize communication between two terminals through the Beidou satellite.

[0068] It should be noted that when the second receiving link receives the S-band satellite signal, the working bandwidth of the second filter needs to be adjusted to the second band, so that the second filter can filter out signals outside the second band.

[0069] In this way, the RF front-end circuit can receive satellite signals in the second band when the second receiving link is connected, and the satellite signals in the second band can still be received while reducing the occupied space of the RF front-end circuit.

[0070] When the above-mentioned RF front-end circuit receives satellite signals through the second transceiver, in an optional embodiment, the signal receiving end of the first frequency band of the second transceiver is connected to the third output end of the first switch; wherein,

[0071] When the control end of the first switch is connected to the third output end of the first switch and the control end of the second switch is connected to the first output end of the second switch, the antenna is used to receive the signal of the first frequency band, the second filter is used to filter the signal of the first frequency band according to the first frequency band, the low noise amplifier is used to perform noise reduction and amplifier processing on the filtered signal, and the second transceiver is used to receive the processed signal through the signal receiving end of the first frequency band.

[0072] It can be understood that the control end of the first switch is connected to the third output end of the first switch, and the control end of the second switch is connected to the first output end of the second switch, and the receiving link formed is the above-mentioned third receiving link, so that the second transceiver can receive the satellite signal of the first frequency band.

[0073] In practical applications, the first frequency band may be the GPS-L1 frequency band, and the third receiving link is used to receive satellite signals in the GPS-L1 frequency band, wherein the satellite signals in the GPS-L1 frequency band are used to realize terminal positioning.

[0074] It should be noted that when the third receiving link receives satellite signals in the GPS-L1 frequency band, the working bandwidth of the second filter needs to be adjusted to the first frequency band, so that the second filter can filter out signals outside the first frequency band.

[0075] In this way, the RF front-end circuit can receive satellite signals in the first frequency band when the third receiving link is connected, and the satellite signals in the first frequency band can still be received on the basis of reducing the occupied space of the RF front-end circuit.

[0076] In order to protect the above three receiving links from being affected by other links, in an optional embodiment, the RF front-end circuit further includes: a grounding resistor; wherein,

[0077] The grounding resistor is connected to the fourth output terminal of the first switch, and the grounding resistor is used to isolate the RF front-end circuit when the RF front-end circuit transmits a signal.

[0078] It can be understood that a grounding circuit is provided in the RF front-end circuit, wherein, in practical applications, the resistance of the grounding circuit may be 50 ohms.

[0079] In the RF front-end circuit, the grounding resistor is connected to the fourth output terminal of the first switch, wherein the fourth switch may be SP4T. By setting a grounding circuit in the RF front-end circuit, the RF front-end circuit can isolate the three receiving links in the RF front-end circuit when transmitting a signal.

[0080] In this way, when the RF front-end circuit transmits signals, the above three receiving links are not affected by other circuits.

[0081] An embodiment of the present application provides an electronic device, Figure 3 A schematic diagram of an optional electronic device provided in an embodiment of the present application Figure 1 ,like Figure 3 As shown, the electronic device 300 includes the RF front-end circuit 200 as described in one or more of the above embodiments.

[0082] The present application provides a method for switching a working bandwidth. Figure 4 A schematic flow chart of an optional working bandwidth switching method is provided for the present application embodiment, such as Figure 4 As shown, the working bandwidth switching method may include:

[0083] S401: Determine working parameters of the electronic device for satellite communication;

[0084] S402: Determine a target operating bandwidth of the second filter according to the operating parameters;

[0085] S403: Switch the operating bandwidth of the second filter to the target operating bandwidth.

[0086] In order to enable the above three receiving links to receive satellite signals, in an embodiment of the present application, the electronic device first determines the working parameters of the satellite communication, where the working parameters are mainly the band or frequency band used when receiving signals for satellite communication.

[0087] After the working parameters are determined, the target working bandwidth of the second filter is determined according to the working parameters. Here, the target working bandwidth of the second filter is determined according to the wave band or frequency band used when receiving the signal.

[0088] After determining the target operating bandwidth, the operating bandwidth of the second filter can be switched to the target operating bandwidth, so that the RF front-end circuit can receive signals through the above-mentioned first receiving link, or receive signals through the above-mentioned second receiving link, or receive signals through the above-mentioned third receiving link.

[0089] In addition, it should be noted that in addition to controlling the second filter, it is also necessary to control the control end of the first switch and the control end of the second switch so that the first receiving link, the second receiving link or the third receiving link are connected, and then control the target working bandwidth of the second filter, so that the electronic device can switch the first receiving link, the second receiving link or the third receiving link, so that the three receiving links can receive satellite signals.

[0090] With respect to determining the target operating bandwidth, in an optional embodiment, determining the target operating bandwidth of the second filter according to the operating parameters includes:

[0091] In the case where the operating parameters indicate that the electronic device receives satellite communication signals using the first band, determining the target operating bandwidth to be the first band;

[0092] In the case where the operating parameters indicate that the electronic device receives satellite communication signals using the second band, determining the target operating bandwidth to be the second band;

[0093] When the operating parameters indicate that the electronic device receives satellite communication signals using a first frequency band, the target operating bandwidth is determined to be the first frequency band.

[0094] It can be understood that when the working parameters indicate that the electronic device uses the first band to receive satellite communication signals, it means that the electronic device needs to receive satellite signals in the first band through the first receiving link. Then, the working bandwidth of the second filter needs to be switched to the first band to filter out signals outside the first band.

[0095] When the working parameters indicate that the electronic device uses the second band to receive satellite communication signals, it means that the electronic device needs to receive satellite signals in the second band through a second receiving link. In this case, the working bandwidth of the second filter needs to be switched to the second band to suppress signals outside the second band.

[0096] When the working parameters indicate that the electronic device uses the first frequency band to receive satellite communication signals, it means that the electronic device needs to receive satellite signals in the first frequency band through the third receiving link. In this case, the working bandwidth of the second filter needs to be switched to the first frequency band to suppress signals outside the first frequency band.

[0097] In this way, the operating bandwidth of the second filter can be determined, so that the electronic device can switch between the first receiving link, the second receiving link or the third receiving link.

[0098] The following examples are used to describe the RF front-end circuit and the method for switching the working bandwidth described in one or more of the above embodiments.

[0099] Figure 5 A schematic diagram of the structure of an example of an optional RF front-end circuit provided in an embodiment of the present application, such as Figure 5 As shown, in Figure 1 On this basis, the three receiving links, namely, the Beidou satellite L-band receiving link, the Global Positioning System (GPS) satellite L1-band receiving link and the Beidou satellite S-band receiving link (BDS_RX-S), are further merged.

[0100] and Figure 1In comparison, in the RF front-end circuit 500, a filter 51, an eLNA52, a SP4T53 and a SPDT54 are set, so that RFIN_L, SP4T53, eLNA52, a filter 51, a combiner 17, SPDT54 and ANT12 are connected in sequence to form BDS_RX_L; the GPS transceiver MT6686_GNSS_IN_L1, SP4T53, eLNA52, a filter 51, a combiner 17, SPDT54 and ANT12 are connected in sequence to form GPS L1; and RFIN_S, a Filter12, SP4T53, eLNA52, a filter 51, a combiner 17, SPDT54 and ANT12 are connected in sequence to form BDS_RX_S.

[0101] It can be seen that the previous receiving hardware solution is optimized and the receiving paths of L1 band L band / S band are merged together first. Figure 1 The SP4T switch in the system uses the SPDT54 with smaller insertion loss. After the combiner 17, the original two filters are replaced by the frequency hopping filter solution. Therefore, when the L1 band L band / S band work respectively, the program controls the frequency hopping filter to select the corresponding L1 band L band / S band to work and suppress its out-of-band frequency band. In addition, an eLNA including the L1 band L band / S band is selected to replace the original two eLNA devices to save one eLNA. The original SPDT device is replaced with SP4T53 at the eLNA output to realize the switching of the four states of Beidou L band / S band, GPS-L1 band, and high isolation (ohmic resistance 50 ohms, grounded). In addition, the RF front end replaces the SP4T with SPDT54 to reduce insertion loss and improve sensitivity.

[0102] In other words, replacing two narrowband eLNAs with one broadband eLNA can effectively save printed circuit board (PCB) area and cost. Similarly, replacing two filters with one frequency hopping filter can also save PCB area. The combiner of GPS satellites and Beidou satellites can also be removed to save area and cost.

[0103] The embodiment of the present application provides a radio frequency front-end circuit, including: a first transceiver, a second transceiver, a first filter, a first switch, a low noise amplifier, a second filter and an antenna, the first transceiver is a signal transceiver for a Beidou satellite, and the second transceiver is a signal transceiver for a GPS satellite; the second filter is a frequency hopping filter, the first receiving end of the first transceiver is connected to the first output end of the first switch, the second receiving end of the first transceiver is connected to the second output end of the first switch, the receiving end of the second transceiver is connected to the output end of the first filter, the input end of the first filter is connected to the third output end of the first switch, the control end of the first switch is connected to the output end of the low noise amplifier, the input end of the low noise amplifier is connected to the output end of the second filter, the input end of the second filter is connected to the antenna, and the radio frequency front-end circuit is used to receive signals from Beidou satellites or GPS satellites; that is, in the embodiment of the present application, the receiving link of the Beidou satellite is merged with the receiving path of the GPS satellite, thereby reducing the number of low noise amplifiers and filters, thereby reducing the number of components in the radio frequency front-end circuit and reducing the space occupied by the radio frequency front-end circuit in the electronic device.

[0104] Based on the same inventive concept as the above embodiments, an embodiment of the present application provides a working bandwidth switching device, which is arranged in the electronic device described in one or more of the above embodiments. Figure 6 A schematic diagram of the structure of an optional working bandwidth switching device provided in an embodiment of the present application, such as Figure 6 As shown, the working bandwidth switching device includes: a first determining module 61, a second determining module 62 and a switching module 63; wherein,

[0105] A first determination module 61 is used to determine the working parameters of the electronic device for satellite communication;

[0106] A second determination module 62, configured to determine a target operating bandwidth of the second filter according to the operating parameters;

[0107] The switching module 63 is used to switch the working bandwidth of the second filter to the target working bandwidth.

[0108] In an optional embodiment, the second determining module 62 is specifically configured to:

[0109] In the case where the operating parameters indicate that the electronic device receives satellite communication signals using the first band, determining the target operating bandwidth to be the first band;

[0110] In the case where the operating parameters indicate that the electronic device receives satellite communication signals using a second band, determining the target operating bandwidth to be the second band;

[0111] When the operating parameters indicate that the electronic device receives satellite communication signals using a first frequency band, the target operating bandwidth is determined to be the first frequency band.

[0112] In practical applications, the first determination module 61, the second determination module 62 and the switching module 63 can be implemented by a processor located on a switching device of the working bandwidth, specifically a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP) or a field programmable gate array (FPGA).

[0113] Figure 7 A schematic diagram of an optional electronic device provided in an embodiment of the present application Figure 2 ,like Figure 7 As shown, an embodiment of the present application provides an electronic device 700, including:

[0114] A processor 71 and a storage medium 72 storing instructions executable by the processor; the storage medium 72 relies on the processor 71 to perform operations through a communication bus 73, and when the instructions are executed by the processor, the working bandwidth switching method executed by the processor side in one or more of the above embodiments is executed.

[0115] It should be noted that in actual application, the various components in the computer device are coupled together through the communication bus 73. It is understandable that the communication bus 73 is used to realize the connection and communication between these components. In addition to the data bus, the communication bus 73 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Figure 7 Various buses are labeled as communication buses 73.

[0116] An embodiment of the present application provides a computer storage medium storing executable instructions. When the executable instructions are executed by one or more processors, the processors execute the working bandwidth switching method described in one or more of the above embodiments.

[0117] Among them, the computer-readable storage medium can be a ferromagnetic random access memory (FRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, a magnetic surface memory, an optical disk, or a compact disc read-only memory (CD-ROM) and other memories.

[0118] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of hardware embodiments, software embodiments, or embodiments in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0119] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0120] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0121] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0122] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A radio frequency front-end circuit, characterized in that: include: A first transceiver, a second transceiver, a first filter, a first switch, a low noise amplifier, a second filter and an antenna, wherein the first transceiver is a signal transceiver of a Beidou satellite, and the second transceiver is a signal transceiver of a GPS satellite; the second filter is a frequency hopping filter; wherein, The first receiving end of the first transceiver is connected to the first output end of the first switch, the second receiving end of the first transceiver is connected to the second output end of the first switch, the receiving end of the second transceiver is connected to the output end of the first filter, the input end of the first filter is connected to the third output end of the first switch, the control end of the first switch is connected to the output end of the low noise amplifier, the input end of the low noise amplifier is connected to the output end of the second filter, and the input end of the second filter is connected to the antenna; The radio frequency front-end circuit is used to receive the signal of the Beidou satellite or the signal of the GPS satellite.

2. The circuit according to claim 1, characterized in that The RF front-end circuit also includes: a combiner; wherein, The input end of the combiner is connected to the antenna, the first output end of the combiner is connected to the input end of the second filter, and the second output end of the combiner is connected to a receiving link of the antenna that can receive a preset frequency band; The preset frequency band is a frequency band other than the first frequency band, the second frequency band and the first frequency band.

3. The circuit according to claim 2, characterized in that The RF front-end circuit further includes: a second switch; wherein, The control end of the second switch is connected to the antenna, the first output end of the second switch is connected to the input end of the combiner, and the second output end of the second switch is connected to the transmission link of the preset frequency band that the antenna can receive.

4. The circuit according to claim 3, characterized in that The second switch is SPDT.

5. The circuit according to claim 4, characterized in that The signal receiving end of the first band of the first transceiver is connected to the first output end of the first switch; wherein, When the control end of the first switch is connected to the first output end of the first switch and the control end of the second switch is connected to the first output end of the second switch, the antenna is used to receive the signal of the first band, the second filter is used to filter the signal of the first band according to the working bandwidth of the first band, the low-noise amplifier is used to perform noise reduction and amplifier processing on the filtered signal, and the first transceiver is used to receive the processed signal through the receiving end of the first band.

6. The circuit according to claim 4, characterized in that The signal receiving end of the second band of the first transceiver is connected to the second output end of the first switch; wherein, When the control end of the first switch is connected to the second output end of the first switch and the control end of the second switch is connected to the first output end of the second switch, the antenna is used to receive the signal of the second band, the second filter is used to perform a first filtering on the signal of the second band according to the working bandwidth of the second band, the low noise amplifier is used to perform noise reduction and amplifier processing on the filtered signal, the first filter is used to perform a second filtering on the processed signal, and the first transceiver is used to receive the second filtered signal through the receiving end of the second band.

7. The circuit according to claim 4, characterized in that The signal receiving end of the first frequency band of the second transceiver is connected to the third output end of the first switch; wherein, When the control end of the first switch is connected to the third output end of the first switch and the control end of the second switch is connected to the first output end of the second switch, the antenna is used to receive the signal of the first frequency band, the second filter is used to filter the signal of the first frequency band according to the working bandwidth of the first frequency band, the low noise amplifier is used to perform noise reduction and amplifier processing on the filtered signal, and the second transceiver is used to receive the processed signal through the receiving end of the first frequency band.

8. The circuit according to any one of claims 1 to 7, characterized in that: The RF front-end circuit also includes: a grounding resistor; wherein, The grounding resistor is connected to the fourth output terminal of the first switch, and the grounding resistor is used to isolate the RF front-end circuit when the RF front-end circuit transmits a signal.

9. An electronic device, characterized in that: Comprising the radio frequency front-end circuit as described in any one of claims 1 to 8.

10. A method for switching working bandwidth, characterized in that: Applicable to the electronic device as claimed in claim 9, comprising: Determining operating parameters of the electronic device for satellite communication; Determining a target operating bandwidth of the second filter according to the operating parameters; The operating bandwidth of the second filter is switched to the target operating bandwidth.

11. The method according to claim 10, characterized in that The step of determining a target operating bandwidth of the second filter according to the operating parameters includes: In a case where the operating parameter indicates that the electronic device receives satellite communication signals using a first band, determining that the target operating bandwidth is the first band; In a case where the operating parameter indicates that the electronic device receives satellite communication signals using a second band, determining that the target operating bandwidth is the second band; When the operating parameter indicates that the electronic device receives satellite communication signals using a first frequency band, the target operating bandwidth is determined to be the first frequency band.

12. A working bandwidth switching device, characterized in that: The electronic device as claimed in claim 9 comprises: A first determination module, used to determine the working parameters of the electronic device for satellite communication; A second determining module, configured to determine a target operating bandwidth of the second filter according to the operating parameters; A switching module is used to switch the working bandwidth of the second filter to the target working bandwidth.

13. An electronic device, characterized in that: include: A processor and a storage medium storing instructions executable by the processor; The storage medium relies on the processor to perform operations through the communication bus, and when the instructions are executed by the processor, the working bandwidth switching method described in claim 10 or 11 is executed.

14. A computer storage medium, characterized in that: Executable instructions are stored, and when the executable instructions are executed by one or more processors, the processors execute the working bandwidth switching method described in claim 10 or 11.

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