Radio frequency system, communication device and satellite communication method

Abstract

The invention relates to a radio frequency system, communication equipment and a satellite communication method. The radio frequency system comprises: a first antenna; a radio frequency transceiver; the satellite communication front-end module is connected with the radio frequency transceiver, and is used for supporting the processing of the SOS transmitting signal from the radio frequency transceiver, transmitting the processed SOS transmitting signal through the first antenna, and receiving an SOS receiving signal and a satellite receiving signal from the first antenna; the first receiving circuit is respectively connected with the satellite communication front-end module and the radio frequency transceiver and is used for supporting receiving processing of satellite receiving signals from the satellite communication front-end module; and the second receiving circuit is respectively connected with the satellite communication front-end module and the radio frequency transceiver, and is used for supporting the receiving processing of the SOS receiving signal from the satellite communication front-end module. By adopting the method and the device, the SOS uplink and the SOS downlink can be supported, so that the short message service and the voice service of the SOS can be supported, and the SOS function is expanded.

Description

Technical Field

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

[0002] With the rapid development of communication equipment, users have higher and higher requirements for the communication quality of communication equipment. However, in certain scenarios, such as when the signal is weak or there is no signal at all, or when encountering dangerous situations such as fire, car accidents, getting lost, etc., traditional communication equipment cannot communicate at this time, and satellite communication is needed to realize the need to send SOS to the outside.

[0003] However, the SOS functions supported by communication devices are limited. Therefore, there is an urgent need to expand the SOS functions of communication devices to meet more communication needs. Summary of the invention

[0004] The present application provides a radio frequency system, a communication device and a satellite communication method, which can support SOS uplink and SOS downlink, thereby supporting SOS text message services and voice services, and expanding the SOS function.

[0005] In a first aspect, the present application provides a radio frequency system, the radio frequency system comprising:

[0006] A first antenna is used to support the transmission of an SOS transmission signal and to support the reception of an SOS reception signal and a satellite reception signal;

[0007] RF transceiver;

[0008] a satellite communication front-end module, connected to the RF transceiver and the first antenna, respectively, for supporting the processing of the SOS transmission signal from the RF transceiver, transmitting the processed SOS transmission signal via the first antenna, and receiving the SOS reception signal and the satellite reception signal from the first antenna;

[0009] A first receiving circuit, connected to the satellite communication front-end module and the radio frequency transceiver, respectively, for supporting reception processing of the satellite reception signal from the satellite communication front-end module;

[0010] The second receiving circuit is connected to the satellite communication front-end module and the radio frequency transceiver respectively, and is used to support the reception processing of the SOS reception signal from the satellite communication front-end module.

[0011] The above-mentioned RF system, through the first antenna, the RF transceiver, the satellite communication front-end module, the first receiving circuit and the second receiving circuit, can support the transmission function of the SOS transmission signal, that is, it supports SOS uplink, and supports the reception function of the SOS reception signal and the satellite reception signal, that is, it supports SOS downlink. Compared with the related technology that only supports SOS uplink, the RF system of the present application can support SOS uplink and SOS downlink. In the scenario where there is no cellular signal, it can use the satellite reception signal to realize positioning, navigation and other functions, and it can also communicate with the satellite to support SOS SMS service and voice service, which expands the SOS function of the RF system to support satellite communication.

[0012] In a second aspect, the present application provides a communication device, wherein the communication device comprises the radio frequency system described in the first aspect.

[0013] The above-mentioned communication equipment supports the transmission function of SOS transmission signals through the radio frequency system, that is, it supports uplink, and supports the reception function of SOS reception signals and satellite reception signals, that is, it supports SOS downlink. Compared with the related technology that only supports SOS uplink, the communication equipment of the present application can support SOS uplink and SOS downlink. In the scenario where there is no cellular signal, it can use satellite reception signals to realize positioning, navigation and other functions, and it can also communicate with satellites to support SOS SMS services and voice services, thereby expanding the SOS function of satellite communication of communication equipment.

[0014] In a third aspect, the present application provides a satellite communication method, applied to the communication device described in the second aspect, the method comprising:

[0015] When the communication device cannot receive a cellular signal, waking up the satellite communication front-end module in the radio frequency system and displaying first sign information of a satellite communication icon;

[0016] Outputting prompt information for adjusting the usage direction of the communication device according to the first flag information;

[0017] When the satellite communication icon is changed to the second sign information, the service type options corresponding to the SOS transmission signal are displayed; the service type options include voice service and SMS service;

[0018] In response to the operation of the target service type option, the radio frequency system is controlled to transmit the SOS transmission signal consistent with the target service type option through the first antenna.

[0019] The above-mentioned satellite communication method can wake up the satellite communication front-end module of the radio frequency system when the communication device cannot receive the cellular signal, and output the prompt information according to the first flag information to prompt the adjustment of the use direction of the communication device. When the satellite communication icon is changed from the first flag information to the second flag information, the radio frequency system is controlled to transmit the SOS transmission signal through the first antenna. Since the communication device supports both the transmission of the SOS transmission signal and the reception of the SOS reception signal and the satellite reception signal, when the satellite communication icon is changed to the second flag information, it indicates that the communication device successfully receives the satellite communication signal. In this case, the SOS voice service and the SOS SMS service can be realized. Compared with the related satellite communication technology that only supports the SMS service, the satellite communication method provided by the present application can also support the voice service, which expands the SOS function in the satellite communication process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of an application environment of a satellite communication method provided by an embodiment;

[0021] Figure 2 One of the structural block diagrams of a radio frequency system provided by an embodiment;

[0022] Figure 3 A second structural block diagram of a radio frequency system provided by an embodiment;

[0023] Figure 4 A third structural block diagram of a radio frequency system provided by an embodiment;

[0024] Figure 5 A fourth structural block diagram of a radio frequency system provided in an embodiment;

[0025] Figure 6 A structural block diagram of a first radio frequency front-end module provided by an embodiment;

[0026] Figure 7 A fifth structural block diagram of a radio frequency system provided in an embodiment;

[0027] Figure 8 A sixth structural block diagram of a radio frequency system provided in an embodiment;

[0028] Fig. 9 A seventh structural block diagram of a radio frequency system provided in an embodiment;

[0029] Fig.10 An eighth structural block diagram of a radio frequency system provided by an embodiment;

[0030] Fig.11 A ninth structural block diagram of a radio frequency system provided in an embodiment;

[0031] Fig.12 A structural block diagram of a second RF front-end module provided by an embodiment;

[0032] Fig.13 A tenth structural block diagram of a radio frequency system provided by an embodiment;

[0033] Fig.14 The eleventh structural block diagram of a radio frequency system provided by an embodiment;

[0034] Fig.15 A structural block diagram of a satellite communication front-end module provided by an embodiment;

[0035] Fig.16 A twelfth structural block diagram of a radio frequency system provided in an embodiment;

[0036] Fig.17 A thirteenth structural block diagram of a radio frequency system provided in an embodiment;

[0037] Fig.18 A structural block diagram of a radio frequency system provided in accordance with an embodiment of the present invention;

[0038] Fig.19 A structural block diagram of a radio frequency system provided in accordance with an embodiment of the present invention;

[0039] Fig. 20 A structural block diagram of a radio frequency system provided in accordance with an embodiment of the present invention;

[0040] Fig.21 The seventeenth structural block diagram of a radio frequency system provided by an embodiment;

[0041] Fig. 22 A structural block diagram of a communication device provided by an embodiment;

[0042] Fig.23 Test data of a radio frequency system provided for an embodiment;

[0043] Fig.24 Test data of a radio frequency system provided for another embodiment;

[0044] Fig.25 A schematic diagram of a flow chart of a satellite communication method provided by an embodiment;

[0045] Fig.26 A schematic flow chart of a satellite communication method provided in another embodiment.

[0046] Description of Figure Numbers:

[0047] 10-communication equipment, 11-communication equipment, 12-communication equipment, 13-communication equipment, 14-base station, 15-core network, 16-Internet, 17-ground station, 20-satellite, 100-RF transceiver, 200-satellite communication front-end module, 210-transmitting circuit, 211-power amplifier, 220-switching circuit, 221-first switching module, 30-first receiving circuit, 301-first filter, 302-low noise amplifier, 303-second filter 40-second receiving circuit, 400-first RF front-end module, 410-first low noise amplifier module, 411-first low noise amplifier unit, 412-second low noise amplifier unit, 420-first sub-receiving module, 421 -first switch unit, 422-first filter unit, 430-second sub-receiving module, 431-second switch unit, 432-second filter unit, 440-first RF routing, 50-third receiving circuit, 500-second RF front-end module, 510-second low-noise amplifier module, 511-third low-noise amplifier unit, 512-fourth low-noise amplifier unit, 520-third sub-receiving module, 521-third switch unit, 522-third filter unit, 530-fourth sub-receiving module, 531-fourth switch unit, 532-fourth filter unit, 540-second RF routing, 600-third RF front-end module, 601-second switch module, 70-power supply circuit, 80-filter circuit. DETAILED DESCRIPTION

[0048] In order to facilitate the understanding of the present application, in order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application, and the preferred embodiments of the present application are given in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0050] The radio frequency system involved in the embodiment of the present application can be applied to a communication device with a communication function, and the communication device can be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., a mobile phone), a mobile station (MS), etc. For the convenience of description, the above-mentioned devices are collectively referred to as communication devices.

[0051] The radio frequency system, communication device and satellite communication method provided in the embodiments of the present application can be applied to Figure 1 In the application environment shown. Figure 1 In the embodiment, each communication device is configured with the radio frequency system provided by the embodiment of the present application. When each communication device is in an environment without cellular signals (such as the ocean or the desert), the communication device 11 and the communication device 12 can realize interconnected communication through the satellite 20. The communication devices 11 and 12 can realize communication with the communication device 13 through the satellite 20 and the mobile public network. Among them, the communication device 11 and the communication device 12 can transmit an SOS transmission signal to the satellite 20, and receive an SOS reception signal and a satellite reception signal from the satellite 20. The communication device 13 realizes interconnected communication with the satellite 20 through the base station 14, the core network 15, the Internet 16 and the ground station 17 in the mobile public network.

[0052] In one embodiment, Figure 2 As shown, a radio frequency system is provided, which includes a first antenna ANT1, a radio frequency transceiver 100, a satellite communication front-end module 200, a first receiving circuit 30 and a second receiving circuit 40. The radio frequency transceiver 100 is used to modulate the SOS transmission signal to be transmitted, and demodulate the received SOS reception signal and the satellite reception signal.

[0053] The satellite communication front-end module 200 is connected to the RF transceiver 100 and the first antenna ANT1 respectively. The satellite communication front-end module 200 is used to support the processing of the SOS transmission signal from the RF transceiver 100, and transmit the processed SOS transmission signal through the first antenna ANT1, and receive the SOS reception signal and the satellite reception signal from the first antenna ANT1. Among them, the first antenna ANT1 is used to support the transmission of the SOS transmission signal, and support the reception of the SOS reception signal and the satellite reception signal.

[0054] The first receiving circuit 30 is connected to the satellite communication front-end module 200 and the RF transceiver 100 respectively, and the first receiving circuit 30 is used to support the reception processing of the satellite reception signal from the satellite communication front-end module 200. The second receiving circuit 40 is connected to the satellite communication front-end module 200 and the RF transceiver 100 respectively, and the second receiving circuit 40 is used to support the reception processing of the SOS reception signal from the satellite communication front-end module 200. Among them, the first receiving circuit 30 and the second receiving circuit 40 are independent of each other, do not interfere with each other, and have a high degree of isolation.

[0055] SOS is an international Morse code distress signal. In an embodiment of the present application, the SOS transmission signal refers to the international Morse code distress signal transmitted by the radio frequency system to the satellite via the first antenna ANT1, and the SOS reception signal refers to the international Morse code distress signal received by the radio frequency system from the satellite via the first antenna ANT1. The SOS transmission signal and the SOS reception signal can be used for emergency rescue. Exemplarily, the SOS transmission signal may include any one of an SOS text transmission signal and an SOS voice transmission signal. The SOS reception signal may include any one of an SOS text reception signal and an SOS voice reception signal. Among them, the radio frequency system can support the SMS service by transmitting the SOS text transmission signal and receiving the SOS text reception signal; the radio frequency system can support the voice service through the SOS voice transmission signal and the SOS voice reception signal. Exemplarily, the frequency range of the SOS transmission signal and the SOS reception signal is 1610MHz-1626.5MHz.

[0056] The satellite reception signal refers to the signal received from the satellite by the radio frequency system via the first antenna ANT1, which is different from the SOS reception signal. The satellite reception signal can be used for positioning, navigation, time reporting, etc., and no limitation is made to the satellite reception signal here. The SOS transmission signal and the satellite reception signal can come from the same satellite or from different satellites. Exemplarily, the SOS reception signal can come from a satellite of the China Beidou system (China North Industries Group Corporation, Beidou Office), and the satellite reception signal can come from a satellite of the Global Positioning System (GPS). Exemplarily, the frequency range of the satellite reception signal is the GPS L1 band.

[0057] The above-mentioned RF system, through the first antenna ANT1, the RF transceiver 100, the satellite communication front-end module 200, the first receiving circuit 30 and the second receiving circuit 40, can support the transmission function of the SOS transmission signal, that is, it supports SOS uplink, and supports the reception function of the SOS reception signal and the satellite reception signal, that is, it supports SOS downlink. Compared with the related technology that only supports SOS uplink, the RF system of the present application can support SOS uplink and SOS downlink. In the scenario where there is no cellular signal, it can use the satellite reception signal to realize positioning, navigation and other functions, and it can also communicate with the satellite interconnection, support SOS SMS service and SOS voice service, and expand the SOS function in satellite communication.

[0058] In one embodiment, Figure 3 As shown, the radio frequency system includes a first antenna ANT1, a second antenna ANT2, a radio frequency transceiver 100, a satellite communication front-end module 200, a first receiving circuit 30, and a second receiving circuit 40. Among them, the second antenna ANT2 is used to support the reception of cellular signals. The second receiving circuit 40 is connected to the radio frequency transceiver 100, the satellite communication front-end module 200, and the second antenna ANT2 respectively. The second receiving circuit 40 is used to support the reception and processing of SOS reception signals and satellite reception signals from the satellite communication front-end module 200, and to support the reception and processing of cellular signals from the second antenna ANT2. Among them, cellular signals include but are not limited to various cellular network signals such as 2G signals, 3G signals, 4G signals, and 5G signals. Based on this, the radio frequency system provided in the embodiment of the present application can support the reception function of SOS reception signals and satellite reception signals, as well as the reception function of cellular signals. Therefore, in the scenario where there is a cellular signal, the second receiving circuit 40 in the radio frequency system can be used to receive cellular signals, thereby expanding the types of signals supported by the radio frequency system.

[0059] In one embodiment, Figure 4 As shown, the second receiving circuit includes a first RF front-end module 400, which is configured with a second antenna port Ant2 connected to the second antenna ANT2, a first output port RX OUT1 connected to the RF transceiver 100, and an auxiliary port AUX connected to the satellite communication front-end module 200.

[0060] The first RF front-end module 400 includes a first low noise amplifier (LNA) module 410. Multiple input ends of the first low noise amplifier module 410 are respectively connected to the second antenna port Ant2 and the auxiliary port AUX, and the output end of the first low noise amplifier module 410 is connected to the first output port RX OUT1. The first low noise amplifier module 410 is used to support power amplification processing of the cellular signal from the second antenna ANT2 and the SOS reception signal from the satellite communication front-end module 200.

[0061] In the above-mentioned RF system, the second receiving circuit includes a first RF front-end module 400, which supports low-noise amplification processing of SOS receiving signals and cellular signals through a first low-noise amplifier module 410, thereby realizing the reuse of the first low-noise amplifier module 410. There is no need to add an additional low-noise amplifier for satellite communication, which reduces the occupied area and cost of the RF system in the printed circuit board (PCB), and is conducive to the miniaturized design of the RF system and communication equipment.

[0062] In one embodiment, Figure 5 As shown, the first low noise amplifier module includes a first low noise amplifier unit 411 and a second low noise amplifier unit 412. The second antenna ANT2 includes a first sub-antenna ANT21 and a second sub-antenna ANT22. The second antenna port Ant2 includes a first sub-antenna port Ant21 and a second sub-antenna port Ant22. The first RF front-end module 400 is also configured with a first sub-antenna port Ant21 connected to the first sub-antenna ANT21, a second sub-antenna port Ant22 connected to the second sub-antenna ANT22, a second output port RX OUT2 connected to the first low noise amplifier unit 411, and a third output port RX OUT3 connected to the second low noise amplifier unit 412.

[0063] The first RF front-end module 400 includes a first low noise amplifier unit 411, a second low noise amplifier unit 412, a first sub-receiving module 420 and a second sub-receiving module 430. Among them, the first sub-receiving module 420 is connected to the input end of the first low noise amplifier unit 411 and the first sub-antenna port Ant21 respectively, and the first sub-receiving module 420 is used to support the reception and processing of the middle and high frequency (Middle frequency band and High frequency band, MHB) signals in the cellular signal from the first sub-antenna ANT21. Exemplarily, the MHB signal may include signals of frequency bands such as B1, B3, B7, B25, B30, B32, B34, B39, B40, B41, B66, and B70. The output end of the first low noise amplifier unit 411 is connected to the second output port RX OUT2 of the first RF front-end module 400, and the first low noise amplifier unit 411 is used to perform low noise amplification processing on the MHB signal from the first sub-receiving module 420.

[0064] The second sub-receiving module 430 is connected to the second low-noise amplifier unit 412 and the second sub-antenna port Ant22 respectively, and the second sub-receiving module 430 is used to support the reception and processing of the low-frequency (Lowfrequency band, LB) signal in the cellular signal from the second sub-antenna ANT22. Exemplarily, the LB signal may include signals of frequency bands such as B8, B20, B26, and B28. The output end of the second low-noise amplifier unit 412 is connected to the first output port RX OUT1 and the third output port RX OUT3 of the first RF front-end module 400 respectively, and the second low-noise amplifier unit 412 is used for power amplification processing of the SOS receiving signal from the satellite communication front-end module 200, and low-noise amplification processing of the low-frequency signal from the second sub-receiving module 430.

[0065] The above-mentioned RF system, wherein the first RF front-end module 400 includes a first low-noise amplifier module 410, a first sub-receiving module 420 and a second sub-receiving module 430, and the first low-noise amplifier module 410 includes a first low-noise amplifier unit 411 and a second low-noise amplifier unit 412, wherein the first low-noise amplifier unit 411 supports low-noise amplification processing of MHB signals, and the second low-noise amplifier unit 412 supports low-noise amplification processing of LB signals and SOS receiving signals, thereby realizing the multiplexing of the second low-noise amplifier unit 412, without the need to add an additional low-noise amplifier for satellite communication, reducing the occupied area and cost of the RF system, and being conducive to the miniaturized design of the RF system and communication equipment.

[0066] Alternatively, if Figure 6As shown, the first sub-receiving module 420 may include a first switch unit 421 and a plurality of first filtering units 422. Among them, the first end of the first switch unit 421 is connected to the first sub-antenna port Ant21, and the plurality of second ends of the first switch unit 421 are respectively connected to the input end of each first filtering unit 422, and the first switch unit 421 is used to select and conduct the path between the input end of each first filtering unit 422 and the first sub-antenna port Ant21. . The output end of each first filtering unit 422 is respectively connected to the input end of the first low-noise amplifier unit 411, and the first filtering unit 422 is used to filter the MHB signal from the first sub-antenna port Ant21. In this application, the type of the first switch unit 421 and the number of the first filtering units 422 are not limited in any way. Based on this, the radio frequency system provided in the embodiment of the present application can support multiple frequency bands in the MHB signal through the first switch unit 421 and the first filtering unit 422, thereby improving the receiving performance of the radio frequency system and improving the quality of the radio frequency system receiving the MHB signal.

[0067] Please continue reading Figure 6 Optionally, the second sub-receiving module 430 may include a second switch unit 431 and a plurality of second filter units 432. Among them, the first end of the second switch unit 431 is connected to the second sub-antenna port Ant22, and the plurality of second ends of the second switch unit 431 are respectively connected to the input end of each second filter unit 432, and the second switch unit 431 is used to select and conduct the path between the input end of each second filter unit 432 and the second sub-antenna port Ant22. The output end of each second filter unit 432 is respectively connected to the input end of the second low-noise amplifier unit 412, and the second filter unit 432 is used to filter the LB signal from the second sub-antenna port Ant22. In the present application, there is no limitation on the type of the second switch unit 431 and the number of the second filter units 432. Based on this, the radio frequency system provided in the embodiment of the present application can support multiple frequency bands in the LB signal through the second switch unit 431 and the second filter unit 432, thereby improving the receiving performance of the radio frequency system and improving the quality of the radio frequency system receiving the LB signal.

[0068] In one embodiment, Figure 7As shown, the second receiving circuit includes a first RF trace 440, and the first RF trace 440 is connected to the satellite communication front-end module 200 and the RF transceiver 100 respectively. The first RF trace 440 is used to transmit the SOS receiving signal from the satellite communication front-end module 200 to the RF transceiver 100. That is, the RF transceiver 100 and the satellite communication front-end module 200 form a receiving path Rx through the first RF trace 440 to support the receiving processing of the SOS receiving signal from the first antenna ANT1. The RF transceiver 100 also forms a transmitting path Tx with the satellite communication front-end module 200 through the transmitting RF trace to support the transmitting processing of the SOS transmitting signal. Based on this, the satellite communication front-end module 200 is directly connected to the RF transceiver 100 through the first RF trace 440, and no low noise amplifier or other devices are set on the receiving link, so that the receiving link trace of the SOS receiving signal is shorter, the link insertion loss is smaller, and the RF system architecture is more streamlined, further reducing the cost and occupied area.

[0069] In one embodiment, Figure 8 As shown, the radio frequency system includes a first antenna ANT1, a third antenna ANT3, a radio frequency transceiver 100, a satellite communication front-end module 200, a first receiving circuit 30, a second receiving circuit 40 and a third receiving circuit 50. Among them, the third receiving circuit 50 is connected to the radio frequency transceiver 100 and the third antenna ANT3 respectively, and the third receiving circuit 50 is used to support the reception processing of the SOS receiving signal from the third antenna ANT3. Among them, the third antenna ANT3 is used to support the reception of the SOS receiving signal from the satellite. In an embodiment of the present application, the second receiving circuit 40 can be used to support the main set MIMO reception (PRX) of the SOS receiving signal from the satellite communication front-end module 200, and the third receiving circuit 50 can be used to support the diversity MIMO reception (DRX) of the SOS receiving signal from the third antenna ANT3. Based on this, the radio frequency system provided in the embodiment of the present application supports the reception diversity of the SOS receiving signal, which helps to improve the signal quality of the SOS receiving signal.

[0070] In one embodiment, Fig. 9As shown, the RF system includes a first antenna ANT1, a third antenna ANT3, a fourth antenna ANT4, a RF transceiver 100, a satellite communication front-end module 200, a first receiving circuit 30, a second receiving circuit 40 and a third receiving circuit 50. The third receiving circuit 50 is also connected to the fourth antenna ANT4, and the third receiving circuit 50 is also used to support the reception and processing of cellular signals from the fourth antenna ANT4. Among them, cellular signals include but are not limited to various cellular network signals such as 2G, 3G, 4G, and 5G. Based on this, the RF system of the present application can support the reception function of SOS reception signals and satellite reception signals, as well as the reception function of cellular signals. Therefore, in the scenario where there is a cellular signal, the third receiving circuit 50 in the RF system can be used to receive the cellular signal, which expands the signal types supported by the RF system.

[0071] In one embodiment, Fig.10 As shown, the third receiving circuit 50 includes a second RF front-end module 500, which is configured with a third antenna port Ant3 connected to the third antenna ANT3, a fourth antenna port Ant4 connected to the fourth antenna ANT4, and a fourth output port RX OUT4 connected to the RF transceiver 100.

[0072] The second RF front-end module 500 includes a second low-noise amplifier module 510, and multiple input ends of the second low-noise amplifier module 510 are respectively connected to the third antenna port Ant3 and the fourth antenna port Ant4, and the output end of the second low-noise amplifier module 510 is connected to the fourth output port Ant4. The second low-noise amplifier module 510 is used to support power amplification processing of the SOS receiving signal from the third antenna ANT3 and the cellular signal from the fourth antenna.

[0073] In the above-mentioned RF system, the third receiving circuit 50 includes a second RF front-end module 500, which supports low-noise amplification processing of SOS receiving signals and cellular signals through a second low-noise amplifier module 510, thereby realizing multiplexing of the second low-noise amplifier module 510. There is no need to add an additional low-noise amplifier for diversity reception of SOS receiving signals, thereby reducing the occupied area and cost of the RF system, and facilitating the miniaturization design of RF systems and communication equipment.

[0074] In one embodiment, Fig.11As shown, the second low noise amplifier module includes a third low noise amplifier unit 511 and a fourth low noise amplifier unit 512. The fourth antenna ANT4 includes a third sub-antenna ANT41 and a fourth sub-antenna ANT42. The fourth antenna port Ant4 includes a third sub-antenna port Ant41 and a fourth sub-antenna port Ant42. The second RF front-end module 500 is also configured with a third sub-antenna port Ant41 connected to the third sub-antenna ANT41, a fourth sub-antenna port Ant42 connected to the fourth sub-antenna ANT42, a fifth output port RX OUT5 connected to the third low noise amplifier unit 511, and a sixth output port RX OUT6 connected to the fourth low noise amplifier unit 512.

[0075] The second RF front-end module 500 includes a third low noise amplifier unit 511, a fourth low noise amplifier unit 512, a third sub-receiving module 520 and a fourth sub-receiving module 530. Among them, the third sub-receiving module 520 is respectively connected to the input end of the third low noise amplifier unit 511 and the third sub-antenna port Ant41, and the third sub-receiving module 520 is used to support the reception and processing of the MHB signal in the cellular signal from the third sub-antenna ANT41. Exemplarily, the MHB signal may include signals of frequency bands such as B1, B3, B7, B25, B30, B32, B34, B39, B40, B41, B66, and B70. The output end of the third low noise amplifier unit 511 is connected to the fifth output port RX OUT5 of the second RF front-end module 510, and the third low noise amplifier unit 511 is used to perform low noise amplification processing on the MHB signal from the third sub-receiving module 520.

[0076] The fourth sub-receiving module 530 is respectively connected to the input end of the fourth low noise amplifier unit 512, the fourth sub-antenna port Ant42, and the third antenna port Ant3. The fourth sub-receiving module 530 is used to support the reception and processing of the LB signal in the cellular signal from the fourth sub-antenna ANT42, and to support the SOS reception signal from the third antenna ANT3. Exemplarily, the LB signal may include signals of frequency bands such as B8, B20, B26, and B28. The input end of the fourth low noise amplifier unit 512 is also connected to the third antenna port Ant3 of the second RF front-end module, and the output end of the fourth low noise amplifier unit 512 is respectively connected to the fourth output port RX OUT4 and the sixth output port RX OUT6 of the second RF front-end module. The fourth low noise amplifier unit 512 is used for power amplification processing of the SOS reception signal from the third antenna ANT3, and low noise amplification processing of the low frequency signal from the fourth sub-receiving module 530.

[0077] The above-mentioned RF system, wherein the second RF front-end module 500 includes a second low-noise amplifier module 510, a third sub-receiving module 520 and a fourth sub-receiving module 530, and the second low-noise amplifier module 510 includes a third low-noise amplifier unit 511 and a fourth low-noise amplifier unit 512, wherein the third low-noise amplifier unit 511 supports low-noise amplification processing of MHB signals, and the fourth low-noise amplifier unit 512 supports low-noise amplification processing of LB signals and SOS receiving signals, thereby realizing the multiplexing of the fourth low-noise amplifier unit 512, without the need to add an additional low-noise amplifier for satellite communication, reducing the occupied area and cost of the RF system, and being conducive to the miniaturized design of the RF system and communication equipment.

[0078] Alternatively, if Fig.12 As shown, the third sub-receiving module 520 may include a third switch unit 521 and a plurality of third filtering units 522. Among them, the first end of the third switch unit 521 is connected to the third sub-antenna port Ant41, and the plurality of second ends of the third switch unit 521 are respectively connected to the input end of each third filtering unit 522, and the third switch unit 521 is used to select and conduct the path between the input end of each third filtering unit 522 and the third sub-antenna port Ant41. Exemplarily, the third switch unit 521 may be a single-pole ten-throw switch (SP10T). The output end of each third filtering unit 522 is respectively connected to the input end of the third low-noise amplifier unit 511, and the third filtering unit 522 is used to filter the MHB signal from the third sub-antenna port Ant41. In the present application, there is no limitation on the type of the third switch unit 521 and the number of the third filtering units 522. Based on this, the RF system provided in the embodiment of the present application can support multiple frequency bands in the MHB signal through the third switch unit 521 and the third filter unit 522, further improving the receiving performance of the RF system and improving the quality of the RF system receiving the MHB signal.

[0079] Please continue reading Fig.12Optionally, the fourth sub-receiving module 530 may include a fourth switch unit 531 and a plurality of fourth filtering units 532. Among them, the first end of the fourth switch unit 531 is connected to the fourth sub-antenna port Ant42, and the plurality of second ends of the fourth switch unit 531 are respectively connected to the input end of each fourth filtering unit 532, and the fourth switch unit 531 is used to select and conduct the path between the input end of each fourth filtering unit 532 and the fourth sub-antenna port Ant42. Exemplarily, the fourth switch unit 531 may be a single-pole seven-throw switch (SP7T). The output end of each fourth filtering unit 532 is respectively connected to the input end of the fourth low-noise amplifier unit 512, and the fourth filtering unit 532 is used to filter the LB signal from the fourth sub-antenna port Ant42. In the present application, there is no limitation on the type of the fourth switch unit 531 and the number of the fourth filtering units 532. Based on this, the RF system provided in the embodiment of the present application can support multiple frequency bands in the LB signal through the fourth switch unit 531 and the fourth filter unit 532, further improving the receiving performance of the RF system and improving the quality of the LB signal received by the RF system.

[0080] In one embodiment, Fig.13 As shown, the third receiving circuit 50 includes a second RF trace 540, and the second RF trace 540 is connected to the RF transceiver 100, and the second RF trace 540 is used to transmit the SOS receiving signal from the third antenna ANT3 to the RF transceiver 100. That is, the RF transceiver 100 and the satellite communication front-end module 200 form a receiving path Rx through the second RF trace 540 to support the receiving processing of the SOS receiving signal from the third antenna ANT3. The RF transceiver 100 also forms a transmitting path Tx with the satellite communication front-end module 200 through the transmitting RF trace to support the transmitting processing of the SOS transmitting signal. Based on this, the third antenna ANT3 is directly connected to the RF transceiver 100 through the second RF trace 540, and no low noise amplifier or other devices are set on the receiving link, so that the receiving link trace of the SOS receiving signal is shorter, the link insertion loss is smaller, the RF system architecture is more streamlined, and the cost and occupied area are further reduced.

[0081] In one embodiment, Fig.14 As shown, the satellite communication front-end module 200 is configured with a first antenna port Ant1 connected to the first antenna ANT1, a first input port RFIN connected to the RF transceiver 100, a seventh output port RX OUT7 connected to the first receiving circuit 30, and an eighth output port RX OUT8 connected to the second receiving circuit 40.

[0082] The satellite communication front-end module 200 includes a transmitting circuit 210 and a switch circuit 220. The input end of the transmitting circuit 210 is connected to the first input port RFIN, and the transmitting circuit 210 is used to support the transmission processing of the SOS transmission signal. The switch circuit 220 is respectively connected to the output end of the transmitting circuit 210, the first antenna port Ant1, the seventh output port RX OUT7, and the eighth output port RX OUT8. The switch circuit 220 is used to select the path between the output end of the transmitting circuit 210, the seventh output port RXOUT7, and the eighth output port RX OUT8 and the first antenna port Ant1.

[0083] In the above-mentioned radio frequency system, the satellite communication front-end module 200 includes a transmitting circuit 210 and a switching circuit 220. The switching circuit 220 can select the path between the output end of the transmitting circuit 210, the seventh output port RX OUT7, and the eighth output port RX OUT8 and the first antenna port Ant1, respectively, thereby adopting a time division duplexing (TDD) working mode to realize the time-sharing switching of the SOS transmitting signal, the SOS receiving signal and the satellite receiving signal using the same antenna, thereby reducing the occupation of spectrum resources.

[0084] In one embodiment, Fig.15 As shown, the transmitting circuit 210 includes a power amplifier (PA) 211, the input end of the power amplifier 211 is connected to the first input port RFIN, and the power amplifier 211 is used to perform power amplification processing on the SOS transmitting signal received by the first input port RFIN.

[0085] The switch circuit 220 includes a first switch module 221, a plurality of first ends of the first switch module 221 are respectively connected to the output end of the power amplifier 211, the seventh output port RX OUT7, and the eighth output port RX OUT8, and a second end of the first switch module 221 is connected to the first antenna port Ant1. The first switch module 221 is used to select and conduct the paths between the output end of the power amplifier 211, the seventh output port RX OUT7, the eighth output port RX OUT8, and the first antenna port Ant1. Exemplarily, the first switch module 221 can be a single-pole three-throw (SP3T) switch.

[0086] In the above-mentioned radio frequency system, the transmitting circuit 210 includes a power amplifier 211, and the switching circuit 220 includes a first switching module 221. Thus, the SOS transmitting signal can be power amplified by the power amplifier 211 to support the transmitting function of the SOS transmitting signal. In addition, the first switching module 221 can select and turn on the paths between the output end of the power amplifier 211, the seventh output port RX OUT7, and the eighth output port RX OUT8 and the first antenna port Ant1, respectively, to achieve time-sharing switching of the SOS transmitting signal, the SOS receiving signal and the satellite receiving signal using the same antenna, thereby reducing the occupation of spectrum resources and improving the receiving and transmitting performance of the radio frequency system.

[0087] Alternatively, if Fig.16 As shown, the radio frequency system includes a radio frequency transceiver 100, a satellite communication front-end module 200, a first receiving circuit 30, a second receiving circuit 40 and a power supply circuit 70. Fig.15 , the satellite communication front-end module 200 includes a transmitting circuit 210, a switching circuit 220 and a DC switch (DC Switch) 230. The satellite communication front-end module 200 is also configured with a power supply port SW, and the satellite communication front-end module 200 is connected to the power supply circuit 70 through the power supply port SW. Among them, the DC switch 230 is respectively connected to the power supply port SW and the power amplifier 211 of the transmitting circuit 210, and the DC switch 230 is used to select the path between the power supply port SW and the power amplifier 211. Among them, the power supply circuit 70 is also used to power the power amplifier in the transmitting module that supports the transmission of cellular signals. Based on this, the power amplifier 211 is powered by the multiplexing power supply circuit 70, so that the power amplifier 211 performs power amplification processing on the SOS transmission signal to support the transmission processing of the SOS transmission signal, without the need to add an additional PA, saving PCB area and device costs.

[0088] Optionally, the satellite communication front-end module may further include a control circuit, the control circuit being connected to the RF transceiver, and the control circuit being used to control the communication control between the RF transceiver and the satellite communication front-end module. Exemplarily, the control circuit may be a mobile industry processor interface (MIPI) controller. Based on this, the communication between the RF transceiver and the satellite communication front-end module may be effectively controlled to improve the reliability of the RF system.

[0089] In one embodiment, Fig.17As shown, the RF transceiver 100 is configured with a first transmitting port TX. The RF system includes the RF transceiver 100, the satellite communication front-end module 200, the first receiving circuit 30, the second receiving circuit 40, the third RF front-end module 600 and the second switch module 601. Among them, the third RF front-end module 600 is used to support the transmission processing of the 2G signal (or GSM signal) in the cellular signal. The first end of the second switch module 601 is used to connect to the first transmitting port TX, the second end of the second switch module 601 is used to connect to the satellite communication front-end module 200, and the other second end of the second switch module 601 is used to connect to the third RF front-end module 600. The second switch module 601 is used to select the path between the satellite communication front-end module 200, the third RF front-end module 600 and the RF transceiver 100. Exemplarily, the second switch module 601 can be a single-pole double-throw (SPDT) switch. Based on this, the RF system provided in the embodiment of the present application realizes the transmission of SOS transmission signals and 2G signals by multiplexing the first transmission port TX, and can support the transmission function of 2G signals through the third RF front-end module 600, further expanding the signal types supported by the RF system.

[0090] In one embodiment, Fig.18 As shown, the first receiving circuit 30 includes a first filter 301, a low noise amplifier 302 and a second filter 303. Among them, the first filter 301 is connected to the satellite communication front-end module 200, and the first filter 301 is used to filter the satellite reception signal from the satellite communication front-end module 200. The low noise amplifier 302 is connected to the first filter 301, and the low noise amplifier 302 is used to perform low noise amplification processing on the satellite reception signal output by the first filter 301. The second filter 303 is connected to the low noise amplifier 302 and the RF transceiver 100 respectively, and the second filter 303 is used to filter the satellite reception signal output by the low noise amplifier 302. Exemplarily, the first filter 301 and the second filter 320 can be surface acoustic wave (Surface Acoustic Wave, SAW) filters. Based on this, the RF system provided in the embodiment of the present application can support the reception processing of the satellite reception signal through the first filter 301, the low noise amplifier 302 and the second filter 303, so that the RF transceiver 100 demodulates the satellite reception signal, thereby improving the signal quality of the satellite reception signal.

[0091] In one embodiment, Fig.19As shown, the radio frequency system includes a radio frequency transceiver 100, a satellite communication front-end module 200, a first receiving circuit 30, a second receiving circuit 40 and a filtering circuit 80. Among them, the filtering circuit 80 is connected to the satellite communication front-end module 200, and the filtering circuit 80 is used to filter the SOS transmission signal from the satellite communication front-end module 200, the SOS receiving signal from the first antenna ANT1, and the satellite receiving signal. Exemplarily, the filtering circuit 80 may include any one of a resistor, a capacitor and an inductor, without any limitation. Based on this, the radio frequency line system provided in the embodiment of the present application can filter out the harmonics in the SOS transmission signal, the SOS receiving signal and the satellite receiving signal through the filtering circuit 80, thereby improving the signal quality of the radio frequency system.

[0092] In one embodiment, Fig. 20 As shown, a radio frequency system is provided, which includes a radio frequency transceiver 100, a satellite communication front-end module 200, a first receiving circuit 30, a first radio frequency front-end module 400, a second radio frequency front-end module 500, a third radio frequency front-end module 600, a second switch module 601, a power supply circuit 70, a filtering circuit 80, a first antenna ANT1, a first sub-antenna ANT21, a second sub-antenna ANT22, a third antenna ANT3, a third sub-antenna ANT41 and a fourth sub-antenna ANT42.

[0093] The satellite communication front-end module 200 includes a power amplifier 211, a first switch module 221 and a DC switch 230. The first receiving circuit 30 includes a first filter 301, a low noise amplifier 302 and a second filter 302. The first RF front-end module 400 includes a first low noise amplifier unit 411, a second low noise amplifier unit 412, a first switch unit 421, a second switch unit 431, a plurality of first filter units 422 and a plurality of second filter units 432. The second RF front-end module 500 includes a third low noise amplifier unit 511, a fourth low noise amplifier unit 512, a third switch unit 521, a fourth switch unit 531, a plurality of third filter units 522 and a plurality of fourth filter units 532.

[0094] Fig. 20The RF system shown can adopt TDD working mode, modulate the SOS transmission signal to be transmitted through the RF transceiver 100, the first switch module 601 conducts the path between the first transmission port TX of the RF transceiver 100 and the first input port RFIN of the satellite communication front-end module 200, the power amplifier 211 conducts power amplification processing on the SOS transmission signal from the RF transceiver 100, the second switch module 221 conducts the path between the output end of the power amplifier 211 and the first antenna port Ant1, and is transmitted by the first antenna ANT1 after filtering processing by the filter circuit 80. Among them, the frequency range of the SOS transmission signal is 1610MHz-1626.5MHz.

[0095] The first antenna ANT1 receives an SOS reception signal and a GPS signal, wherein the frequency range of the SOS reception signal is 1610MHz-1626.5MHz, and the GPS signal is a signal of the GPS L1 frequency band. When the second switch module 221 conducts the path between the first antenna port Ant1 and the eighth output port RX OUT8 of the satellite communication front-end module 200, the first filter 301 filters the GPS signal from the satellite communication front-end module 200, and after being processed by the low noise amplifier 302 and the second filter 303, the GPS signal is demodulated by the RF transceiver 100. When the second switch module 221 conducts the path between the first antenna port Ant1 and the seventh output port RX OUT7 of the satellite communication front-end module 200, the SOS reception signal enters the second low noise amplifier unit 412 through the auxiliary port AUX of the first RF front-end module 400, and the RF transceiver 100 demodulates the SOS reception signal output by the second low noise amplifier unit 412 after low noise amplification. The transmission of the SOS transmission signal, the reception of the SOS reception signal and the GPS signal are switched by the second switch module, so as to realize the time-sharing reception and transmission of the common first antenna ANT.

[0096] The third antenna ANT3 receives the SOS receiving signal in diversity. The fourth low noise amplifier unit 512 in the second RF front-end module 500 performs low noise amplification processing on the SOS receiving signal from the third antenna ANT3 and transmits it to the RF transceiver 100. The RF transceiver 100 demodulates the SOS receiving signal, thereby realizing diversity reception of the SOS receiving signal.

[0097] Among them, the first RF front-end module 400 can also support the reception and processing of the MHB signal from the first sub-antenna ANT21, and support the reception and processing of the LB signal from the second sub-antenna ANT22. The second RF front-end module 500 can also support the reception and processing of the MHB signal from the third sub-antenna ANT41, and support the reception and processing of the LB signal from the fourth sub-antenna ANT422. The third RF front-end module 600 supports the transmission processing of the GSM signal modulated by the RF transceiver 100. The power supply circuit 70 can power the power amplifier 211, and can also power the PA of the transmission module supporting cellular signals. The filter circuit 80 can filter the signal transmitted on the path between the satellite communication front-end module 200 and the first antenna ANT1.

[0098] In one embodiment, Fig.21 As shown, another RF system is provided, which includes an RF transceiver 100, a satellite communication front-end module 200, a first receiving circuit 30, a third RF front-end module 600, a second switch module 601, a power supply circuit 70, a filter circuit 80, a first RF trace 440, a second RF trace 540, a first antenna ANT1, a first sub-antenna ANT21, a second sub-antenna ANT22, a third antenna ANT3, a third sub-antenna ANT41 and a fourth sub-antenna ANT42. The first RF trace 440 is connected to the seventh output port RX OUT7 and the RF transceiver 100 respectively, and the second RF trace 540 is connected to the third antenna ANT3 and the RF transceiver 100 respectively.

[0099] Fig.21 The process of transmitting SOS and receiving GPS signals by the radio frequency system shown in FIG. 1 , the third radio frequency front-end module 600, the power supply circuit 70, and the filter circuit 80 are all the same as Fig. 20 The RF system shown is the same, please refer to the above related content for details, and will not be repeated here. Fig.21 In the process of receiving the SOS reception signal by the RF system shown, the second switch module 221 conducts the path between the first antenna port Ant1 and the satellite communication front-end module RX OUT7, and the RF transceiver 100 demodulates the SOS reception signal from the satellite communication front-end module 200. The RF transceiver 100 also supports demodulation of the SOS reception signal from the ANT3 diversity reception.

[0100] Fig. 20 and Fig.21The radio frequency system shown adopts the TDD working mode, which occupies less spectrum resources and does not affect the use of other systems compared to the frequency division duplexing (FDD) working mode adopted in the related art; the second switch module 221 can realize the time-sharing switching of the common antenna for GPS and SOS communications; a filter circuit 80 is provided in the path between the first antenna ANT1 and the satellite communication front-end module 200 to filter out harmonics, reduce the number of filters on the transmitting and receiving paths, optimize the radio frequency link, improve the radio frequency performance, and save PCB area and cost; in addition, the power supply circuit 70 can be reused to power the power amplifier 211 and the PA of the transmitting module supporting cellular signals, without the need for an additional boost chip (Boost IC), saving PCB area and device cost; Fig. 20 The LNA in the first RF front-end module 400 and the second RF front-end module 500 are reused, and no additional low-noise amplifier is required, saving PCB area and device cost; and supports receive diversity of SOS receive signals with high signal quality; it can also support SOS uplink and SOS downlink, support SMS service and voice service, and the SOS communication function is relatively comprehensive.

[0101] Through actual testing, when the PRX and DRX of the SOS receiving signal are not processed by the low noise amplifier, that is, when the LNA device is skipped, the reception performance of the main set and diversity also meets the design requirements. The sensitivity difference between the SOS receiving signal after low noise amplification and without low noise amplification is 1dB-1.5dB, and both can meet the design requirements of more than -116dBm. The actual test was carried out using the development board (Evaluation Board, EVB), Fig. 20 and Fig.21 The RF indicators of the RF system shown meet the requirements. The test data is as follows Fig. 22 and Fig.23 As shown, the RF power (Transmitter Power) is 36±1dB, and the sensitivity (Downlink BER Sensitivity) is less than or equal to -116dBm. Fig.21 In the RF system shown, the SOS receiving signal does not undergo low-noise amplification processing, its receiving link routing is shorter, the link insertion loss is smaller, and the RF architecture is more streamlined.

[0102] In one embodiment, Fig.24 As shown, a communication device is provided, the communication device 10 includes the radio frequency system provided by any of the above embodiments, wherein the radio frequency system may include a first antenna ANT1, a radio frequency transceiver, a satellite communication front-end module, a first receiving circuit and a second receiving circuit, Fig.24Only the first antenna ANT1 is shown. For a detailed introduction to the radio frequency system, please refer to the aforementioned related content and will not be repeated here.

[0103] The above-mentioned communication equipment supports the transmission function of SOS transmission signals through the radio frequency system, that is, it supports SOS uplink, and supports the reception function of SOS reception signals and satellite reception signals, that is, it supports SOS downlink. Compared with the related technology that only supports SOS uplink, the communication equipment of the present application can support SOS uplink and SOS downlink. In the scenario where there is no cellular signal, it can use satellite reception signals to realize positioning, navigation and other functions, and it can also communicate with satellites to support SMS services and voice services, thereby expanding the SOS function of satellite communication of communication equipment.

[0104] Please continue reading Fig.24 In one embodiment, the radio frequency system may include a first antenna ANT1, a second antenna ANT2, a radio frequency transceiver, a satellite communication front-end module, a first receiving circuit and a second receiving circuit. Fig.24 Only the first antenna ANT1 and the second antenna ANT2 are shown. For a detailed introduction to the radio frequency system, please refer to the above-mentioned related content, which will not be repeated here. Among them, the second antenna ANT2 is connected to the second receiving circuit of the radio frequency system, and the second antenna ANT2 is used to support the reception of cellular signals. Among them, the second receiving circuit is used to support the reception and processing of cellular signals from the second antenna ANT2. The second receiving circuit can refer to the related content of the aforementioned embodiment, which will not be repeated here. Among them, cellular signals include but are not limited to various mobile communication signals such as 2G signals, 3G signals, 4G signals, and 5G signals. Based on this, the communication device provided in the embodiment of the present application can also support the reception and processing of cellular signals through the second antenna ANT2 and the radio frequency system, thereby improving the reception performance of cellular signals.

[0105] Please continue reading Fig.24 In one embodiment, the radio frequency system may include a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, a radio frequency transceiver, a satellite communication front-end module, a first receiving circuit, a second receiving circuit, and a third receiving circuit. Fig.24Only the first antenna ANT1, the second antenna ANT2 and the third antenna ANT3 are shown. For a detailed introduction to the radio frequency system, please refer to the above-mentioned related content, which will not be repeated here. Among them, the third antenna ANT3 is connected to the third receiving circuit of the radio frequency system, and the third antenna ANT3 is used to support the reception of the SOS receiving signal. Among them, the third receiving circuit can refer to the related content of the aforementioned embodiment, which will not be repeated here. Specifically, the first antenna ANT1 is used to support the main set MIMO reception of the SOS receiving signal, and the third antenna ANT3 is used to support the diversity MIMO reception of the SOS receiving signal. Based on this, the communication device provided in the embodiment of the present application realizes the main set MIMO reception and diversity MIMO reception of the SOS receiving signal through the first antenna ANT1, the third antenna ANT3 and the radio frequency system, which is beneficial to improve the quality of the SOS receiving signal.

[0106] Optionally, the above communication device may further include a fourth antenna ANT4 ( Fig.24 The fourth antenna ANT3 is connected to the third receiving circuit of the radio frequency system, and the fourth antenna ANT4 is used to support the reception of cellular signals. Based on this, the communication device provided in the embodiment of the present application receives cellular signals through the first antenna ANT1, the third antenna ANT3, the fourth antenna ANT4 and the radio frequency system, thereby further improving the reception performance of the communication device for cellular signals.

[0107] In one embodiment, Fig.25 As shown, a satellite communication method is provided, which is applied to the communication device provided by any of the above embodiments. The method may include the following S2502 to S2508.

[0108] S2502: When the communication device cannot receive a cellular signal, wake up the satellite communication front-end module in the radio frequency system and display the first sign information of the satellite communication icon.

[0109] After waking up the satellite communication front-end module, the satellite communication front-end module can be used to support the transmission processing of the SOS transmission signal. The first flag information is used to indicate that the communication device has not received the satellite reception signal. Exemplarily, the first flag information can be the color information of the satellite communication icon.

[0110] S2504: Outputting prompt information for adjusting the use direction of the communication device according to the first flag information, wherein the prompt information is used to guide the adjustment of the use direction of the communication device so as to successfully receive the satellite reception signal.

[0111] S2506: When the satellite communication icon is changed to the second symbol information, the service type option corresponding to the SOS transmission signal is displayed.

[0112] When the satellite communication icon changes from the first sign information to the second sign information, it indicates that the communication device has successfully received the satellite reception signal. In this case, the communication device is interconnected with the satellite and can communicate with the satellite. The second sign information is used to indicate that the communication device has received the satellite reception signal. The service type options include voice service and SMS service.

[0113] S2508: In response to the operation on the target service type option, control the radio frequency system to transmit an SOS transmission signal consistent with the target service type option through the first antenna.

[0114] The target service type option includes any one of a voice service and a short message service. The SOS transmission signal includes an SOS voice transmission signal and an SOS text transmission signal. If the target service type option is a voice service, the radio frequency system can be controlled to transmit an SOS voice transmission signal through the first antenna. In this case, the SOS voice reception signal can be received by the radio frequency system to implement the voice service. If the target service type option is a short message service, the radio frequency system can be controlled to transmit an SOS text transmission signal through the first antenna. In this case, the SOS text reception signal can be received by the radio frequency system to implement the short message service.

[0115] The above-mentioned satellite communication method can wake up the satellite communication front-end module of the radio frequency system when the communication device cannot receive the cellular signal, and output a prompt message according to the first flag information to prompt the adjustment of the use direction of the communication device. When the satellite communication icon changes from the first flag information to the second flag information, the radio frequency system is controlled to transmit the SOS transmission signal through the first antenna. Since the communication device supports both the transmission of the SOS transmission signal and the reception of the SOS reception signal and the satellite reception signal, when the satellite communication icon changes to the second flag information, it indicates that the communication device successfully receives the satellite communication signal. In this case, the SOS voice service and the SOS SMS service can be realized. Compared with the related satellite communication technology that only supports the SMS service, the satellite communication method provided in this application can also support the voice service, which expands the SOS function of the satellite communication.

[0116] In one embodiment, the SOS transmission signal includes an SOS text transmission signal and an SOS voice transmission signal. The above step S2508: in response to the operation of the target service type option, controlling the radio frequency system to transmit the SOS transmission signal consistent with the target service type option through the first antenna may include: when the target service type option is a voice service, in response to the operation of the voice service, controlling the radio frequency system to transmit the SOS voice transmission signal through the first antenna; when the target service type option is a text message service, in response to the operation of the text message service, controlling the radio frequency system to transmit the SOS text transmission signal through the first antenna. Based on this, the SOS voice transmission signal and the SOS text transmission signal are transmitted to the satellite through the first antenna, thereby realizing the SOS voice service and the SOS text message service, thereby realizing the expansion of the SOS function of the communication device.

[0117] In one embodiment, the satellite communication method may further include: in response to the operation of the target service type option, controlling the radio frequency system to receive the SOS reception signal and the satellite reception signal consistent with the target service type option through the first antenna. Based on this, the communication device receives the SOS reception signal and the satellite reception signal from the satellite on the basis of transmitting the SOS transmission signal, realizes the SOS uplink and SOS downlink, thereby realizing the SOS voice service and SOS SMS service, and can also receive the satellite reception signal to realize other satellite functions such as positioning, navigation, and time reporting, thereby expanding the SOS function of the communication device.

[0118] In one embodiment, the flag information may include at least one of the shape, color, and progress bar of the satellite communication icon. The first flag information is different from the second flag information. Exemplarily, the flag information includes color. For example, the first flag information is set to gray, that is, when the satellite communication icon is gray, the communication device cannot successfully receive the satellite reception signal; the second flag information is set to green, that is, when the satellite communication icon is green, the communication device can successfully receive the satellite reception signal. In practical applications, the first flag information and the second flag information can be set in advance, and no limitation is made to the first flag information and the second flag information. Based on the first flag information and the second flag information, the communication status between the communication device and the satellite can be more intuitively understood, so as to guide the operation of adjusting the use direction of the communication device and selecting the target service type option, thereby improving the user experience.

[0119] In one embodiment, Fig.26 As shown, another satellite communication method is provided. The method is applied to the communication device provided in any of the above embodiments.

[0120] Specifically, in case of emergency, make an emergency call, such as 112, to confirm whether you can connect. If you cannot connect, it means that the signal of the communication device is weak or there is no signal, and the SOS satellite communication function will be automatically awakened. After waking up the SOS satellite communication function, a questionnaire dialog box pops up, and you can select the problem you encounter according to your own situation, such as fire, car accident, getting lost, injury, disease, crime and other emergency rescue situations. Then confirm whether to notify the emergency contact (the emergency contact has been added by default). If you do not select it, you will choose to contact the nearest local emergency department. At this time, a gray satellite communication icon will appear. According to the position of the satellite communication icon, adjust the direction of the phone until the icon turns green. Then, a dialog box pops up, and you can choose to communicate by phone voice or text message according to the actual situation. If you choose to communicate by text message, edit the text message content, including the questionnaire just filled in, location and power information, etc.; if you choose the phone voice communication method, call directly for a voice call until it ends.

[0121] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0122] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0123] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A radio frequency system, characterized in that: The radio frequency system comprises: A first antenna is used to support the transmission of an SOS transmission signal and to support the reception of an SOS reception signal and a satellite reception signal; RF transceiver; a satellite communication front-end module, connected to the RF transceiver and the first antenna, respectively, for supporting the processing of the SOS transmission signal from the RF transceiver, transmitting the processed SOS transmission signal via the first antenna, and receiving the SOS reception signal and the satellite reception signal from the first antenna; A first receiving circuit, connected to the satellite communication front-end module and the radio frequency transceiver, respectively, for supporting reception processing of the satellite reception signal from the satellite communication front-end module; The second receiving circuit is connected to the satellite communication front-end module and the radio frequency transceiver respectively, and is used to support the reception processing of the SOS reception signal from the satellite communication front-end module.

2. The radio frequency system according to claim 1, characterized in that: The radio frequency system also includes a second antenna for supporting reception of cellular signals; the second receiving circuit is connected to the second antenna and is also used to support reception processing of the cellular signals from the second antenna.

3. The radio frequency system according to claim 2, characterized in that: The second receiving circuit includes a first RF front-end module, the first RF front-end module is configured with a second antenna port connected to the second antenna, a first output port connected to the RF transceiver, and an auxiliary port connected to the satellite communication front-end module, wherein the first RF front-end module includes: A first low noise amplifier module, wherein a plurality of input ends of the first low noise amplifier module are respectively connected to the second antenna port and the auxiliary port, an output end of the first low noise amplifier module is connected to the first output port, and the first low noise amplifier module is used to support power amplification processing of a cellular signal from the second antenna and a SOS receiving signal from the satellite communication front-end module.

4. The radio frequency system according to claim 3, characterized in that: The first low noise amplifier module includes a first low noise amplifier unit and a second low noise amplifier unit, the second antenna includes a first sub-antenna and a second sub-antenna, the second antenna port includes a first sub-antenna port and a second sub-antenna port, the first RF front-end module is also configured with the first sub-antenna port connected to the first sub-antenna, the second sub-antenna port connected to the second sub-antenna, a second output port connected to the first low noise amplifier unit, and a third output port connected to the second low noise amplifier unit, the first RF front-end module also includes: a first sub-receiving module, connected to the input end of the first low-noise amplifier unit and the first sub-antenna port respectively, and used to support reception and processing of medium and high frequency signals in the cellular signal from the first sub-antenna; a second sub-receiving module, connected to the input end of the second sub-low noise amplifier unit and the second sub-antenna port respectively, and used to support reception and processing of a low-frequency signal in a cellular signal from the second antenna; Among them, the output end of the first low noise amplifier unit is connected to the second output port, and the first low noise amplifier is used to perform low noise amplification processing on the medium and high frequency signals from the first sub-receiving module; the output end of the second low noise amplifier unit is respectively connected to the first output port and the third output port, and the second low noise amplifier unit is used to perform power amplification processing on the SOS receiving signal from the satellite communication front-end module, and perform low noise amplification processing on the low frequency signal from the second sub-receiving module.

5. The radio frequency system according to claim 1, characterized in that: The radio frequency system also includes: A third antenna, used to support receiving the SOS reception signal; The third receiving circuit is connected to the radio frequency transceiver and the third antenna respectively, and is used to support reception processing of the SOS reception signal from the third antenna.

6. The radio frequency system according to claim 5, characterized in that: The radio frequency system also includes: a fourth antenna for supporting reception of cellular signals; The third receiving circuit is connected to the fourth antenna, and is also used to support reception processing of cellular signals from the fourth antenna.

7. The radio frequency system according to claim 6, characterized in that: The third receiving circuit includes a second RF front-end module, the second RF front-end module is configured with a third antenna port connected to the third antenna, a fourth antenna port connected to the fourth antenna, and a fourth output port connected to the RF transceiver, wherein the second RF front-end module includes: a second low noise amplifier module, wherein a plurality of input ends of the second low noise amplifier module are respectively connected to the third antenna port and the fourth antenna port, an output end of the second low noise amplifier module is connected to the fourth output port, and the second low noise amplifier module is used to support power amplification processing of the SOS reception signal from the third antenna and the cellular signal from the fourth antenna.

8. The radio frequency system according to claim 1, characterized in that: The satellite communication front-end module is configured with a first antenna port connected to the first antenna, a first input port connected to the radio frequency transceiver, a seventh output port connected to the first receiving circuit, and an eighth output port connected to the second receiving circuit; wherein the satellite communication front-end module includes: a transmitting circuit, wherein an input end of the transmitting circuit is connected to the first input port, and is used to support transmission processing of the SOS transmission signal; The switch circuit is respectively connected to the output end of the transmitting circuit, the first antenna port, the seventh output port, and the eighth output port, and is used to select and conduct the paths between the output end of the transmitting circuit, the seventh output port, the eighth output port and the first antenna port respectively.

9. The radio frequency system according to claim 8, characterized in that: The transmitting circuit includes a power amplifier, an input end of the power amplifier is connected to the first input port, and is used to perform power amplification processing on the SOS transmitting signal received by the first input port; The switching circuit includes a first switching module, wherein multiple first ends of the first switching module are respectively connected to the output end of the power amplifier, the seventh output port, and the eighth output port, and the second end of the first switching module is connected to the first antenna port. The first switching module is used to select and conduct the paths between the output end of the power amplifier, the seventh output port, the eighth output port and the first antenna port respectively.

10. The radio frequency system according to claim 1, characterized in that: The radio frequency transceiver is configured with a first transmitting port, and the radio frequency system further comprises: A third RF front-end module is used to support the transmission processing of 2G signals in cellular signals; A second switch module, a first end of the second switch module is used to connect to the first transmitting port, a second end of the second switch module is used to connect to the satellite communication front-end module, and another second end of the second switch module is used to connect to the third RF front-end module. The second switch module is used to select and conduct the paths between the satellite communication front-end module, the third RF front-end module and the RF transceiver respectively.

11. The radio frequency system according to claim 1, characterized in that: The first receiving circuit comprises: A first filter, connected to the satellite communication front-end module, for filtering the satellite reception signal from the satellite communication front-end module; a low noise amplifier, connected to the first filter, and configured to perform low noise amplification processing on the satellite reception signal output by the first filter; The second filter is connected to the low noise amplifier and the radio frequency transceiver respectively, and is used for filtering the satellite reception signal output by the low noise amplifier.

12. The radio frequency system according to claim 1, characterized in that: The radio frequency system also includes a filtering circuit, which is connected to the satellite communication front-end module. The filtering circuit is used to filter the SOS transmission signal from the satellite communication front-end module, the SOS reception signal from the first antenna, and the satellite reception signal.

13. A communication device, characterized in that: The communication device comprises: A radio frequency system as claimed in any one of claims 1 to 12.

14. A satellite communication method, characterized in that: Applied to the communication device as claimed in claim 13, the method comprises: When the communication device cannot receive a cellular signal, waking up the satellite communication front-end module in the radio frequency system and displaying first sign information of a satellite communication icon; Outputting prompt information for adjusting the usage direction of the communication device according to the first flag information; When the satellite communication icon is changed to the second sign information, the service type options corresponding to the SOS transmission signal are displayed; the service type options include voice service and SMS service; In response to the operation of the target service type option, the radio frequency system is controlled to transmit the SOS transmission signal consistent with the target service type option through the first antenna.

15. The communication device according to claim 14, characterized in that The SOS transmission signal includes an SOS text transmission signal and an SOS voice transmission signal, and in response to the operation on the target service type option, controlling the radio frequency system to transmit the SOS transmission signal consistent with the target service type option through the first antenna includes: When the target service type option is the voice service, in response to an operation on the voice service, controlling the radio frequency system to transmit the SOS voice transmission signal through the first antenna; In a case where the target service type option is the SMS service, in response to an operation on the SMS service, the radio frequency system is controlled to transmit the SOS text transmission signal through the first antenna.

16. The communication device according to claim 14, characterized in that The method further comprises: In response to the operation on the target service type option, the radio frequency system is controlled to receive the SOS reception signal and the satellite reception signal consistent with the target service type option through the first antenna.

17. The communication device according to claim 14, characterized in that The logo information includes at least one of a shape, a color, and a progress bar of the satellite communication icon.

Images