Radio frequency system and communication device

Abstract

The invention relates to a radio frequency system and communication equipment, and the radio frequency system comprises a first radio frequency circuit which comprises a first communication unit and a first power amplification unit, the first communication unit is used for providing a cellular signal, and the first power amplification unit is used for amplifying the cellular signal; the first power amplification unit is used for performing power amplification on the received cellular signal and the target wireless signal and then outputting the signals to the corresponding antenna; the second radio frequency circuit is used for providing a target wireless signal, performing power amplification on the target wireless signal and outputting the target wireless signal to a corresponding antenna; the first switching circuit is respectively connected with the first communication unit, the first power amplification unit and the second radio frequency circuit and is used for switching on or switching off the second radio frequency circuit and selectively switching on a channel from a cellular signal and a target wireless signal to the first power amplification unit; the processing circuit is used for determining the on-off state of the first switching circuit according to the target transmitting power of the target wireless signal and the working state of the first power amplification unit so as to support transmitting of the target wireless signal.

Description

Technical Field

[0001] This application relates to the field of Bluetooth technology, and in particular to a radio frequency system and communication device. Background Technology

[0002] With the increasing demand for network access and interconnection between devices, a single communication method can no longer meet the needs. Therefore, more and more devices are equipped with multiple communication methods to meet the requirements for network access and interconnection, such as Long-Term Evolution (LTE), Wireless Fidelity (WIFI), Bluetooth (BT), etc.

[0003] To improve the uplink communication efficiency of WiFi or Bluetooth signals, it is often necessary to add an external power amplifier that is independent of the WiFi chip or Bluetooth signal, which is costly. Summary of the Invention

[0004] This application provides a radio frequency system and communication device that enables a target wireless signal (e.g., a WiFi signal or a Bluetooth signal) to multiplex a cellular signal power amplification unit, thereby increasing the uplink power of the target wireless signal and meeting the high uplink power requirements.

[0005] The second aspect provides a radio frequency system, including:

[0006] The first radio frequency circuit includes a first communication unit and a first power amplification unit, wherein the first communication unit is used to provide cellular signals, and the first power amplification unit is used to amplify the received cellular signals and target wireless signals and output them to the corresponding antennas.

[0007] The second radio frequency circuit is used to provide a target wireless signal and amplify the target wireless signal before outputting it to the corresponding antenna; the output power of the first radio frequency circuit is lower than the output power of the second radio frequency circuit; the target wireless transmission signal includes at least one of Bluetooth signal and WiFi signal;

[0008] The first switching circuit is connected to the first communication unit, the first power amplifier unit, and the second radio frequency circuit respectively, and is used to turn on or off the second radio frequency circuit, and to selectively turn on the path of the cellular signal and the target wireless signal to the first power amplifier unit.

[0009] The processing circuit is connected to the first radio frequency circuit and the second radio frequency circuit respectively, and is used to determine the on / off state of the first switching circuit according to the target transmission power of the target wireless signal and the operating state of the first power amplification unit, so as to support the transmission of the target wireless signal.

[0010] The second aspect provides a communication device, including the aforementioned radio frequency system.

[0011] The aforementioned radio frequency system and communication equipment include a first radio frequency circuit, a second radio frequency circuit, a first switching circuit, and a processing circuit. The first radio frequency circuit includes a first communication unit and a first power amplification unit. The first communication unit provides cellular signals, and the first power amplification unit amplifies the received cellular signals and outputs them to the corresponding antenna. The second radio frequency circuit provides target wireless signals and amplifies them before outputting them to the corresponding antenna. The first switching circuit is connected to the first communication unit, the first power amplification unit, and the second radio frequency circuit, respectively, and is used to turn the second radio frequency circuit on or off, and to selectively enable the transmission paths of cellular signals and target wireless signals to the first power amplification unit. Thus, the radio frequency system can provide two transmission paths for wireless target signals (Bluetooth or WiFi signals), one of which can reuse the first power amplification unit. The unit amplifies the power of the received wireless target signal. Another path can amplify the power of the wireless target signal based on the second radio frequency circuit. The output power of the transmission path that reuses the first power amplification unit is higher than the transmission power of the second radio frequency circuit. In this way, the radio frequency system can select the appropriate transmission path based on the transmission application scenario of the target wireless signal. For example, in the scenario of high-power transmission of the target wireless signal, the first power amplification unit can be reused to amplify the power of the target wireless signal, so as to achieve high-power output of the target wireless signal. At the same time, the hardware architecture of the radio frequency system is simple, only adding the first switching circuit. The hardware can save the need for an additional external power amplifier, effectively saving cost and area, and well balancing performance, cost and area requirements. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is one of the structural block diagrams of a radio frequency system in one embodiment;

[0015] Figure 2 This is a second structural block diagram of a radio frequency system according to one embodiment;

[0016] Figure 3 This is the third structural block diagram of the radio frequency system in one embodiment;

[0017] Figure 4 This is the fourth block diagram of the radio frequency system in one embodiment;

[0018] Figure 5a This is a structural block diagram of a radio frequency system supporting WiFi signal transmission in related technology one;

[0019] Figure 5b This is a structural framework of a radio frequency system supporting WiFi signal transmission in related technology 2;

[0020] Figure 6 This is the fifth block diagram of the radio frequency system in one embodiment;

[0021] Figure 7 This is a block diagram of the radio frequency system in one embodiment;

[0022] Figure 8 A flowchart of a communication control method in another embodiment;

[0023] Figure 9a This is a structural block diagram of a radio frequency system supporting Bluetooth signal transmission in related technology one;

[0024] Figure 9b This is a structural block diagram of a radio frequency system supporting Bluetooth signal transmission in related technology 2;

[0025] Figure 9c The structural framework of the radio frequency system supporting Bluetooth signal transmission in related technology three;

[0026] Figure 10 This is the seventh structural block diagram of a radio frequency system in one embodiment;

[0027] Figure 11 This is the eighth block diagram of the radio frequency system in one embodiment;

[0028] Figure 12 This is block diagram nine of a radio frequency system in one embodiment.

[0029] Component designation explanation:

[0030] First radio frequency circuit: 110; First communication unit: 111; First power amplifier unit: 113;

[0031] Second radio frequency circuit: 120; Second communication unit: 121; First transmit port: TX1; Second transmit port: TX2; Receive port: RX; Second power amplifier unit: 123;

[0032] First switching circuit: 130; First switch: 131; Second switch: 132; First switching unit: 133; Second switching unit: 134;

[0033] Processing circuit: 140;

[0034] Filtering circuit: 150; First filter unit: 151; Second filter unit: 152; Third switching unit: 153; Third filter unit: 154;

[0035] Second switching circuit: 160. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] It is understood that the terms "first," "second," etc., used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first radio frequency circuit may be referred to as a second radio frequency circuit, and similarly, a second radio frequency circuit may be referred to as a first radio frequency circuit. Both the first radio frequency circuit and the second radio frequency circuit are transmitting circuits, but they are not the same transceiver circuit.

[0038] like Figure 1 and Figure 2 As shown, this application provides a radio frequency system that can support wireless communication of multiple different communication standards, such as cellular mobile communication (hereinafter referred to as cellular communication), WIFI communication, Bluetooth communication, simultaneous communication of WiFi and Bluetooth, simultaneous communication of WiFi and cellular, etc.

[0039] The radio frequency system includes a first radio frequency circuit 110, a second radio frequency circuit 120, a first switching circuit 130, and a processing circuit 140. The first radio frequency circuit 110 includes a first communication unit 111 and a first power amplification unit 113. The first communication unit 111 provides cellular signals. Exemplarily, the first communication unit 111 may include a cellular chip, such as a cellular radio frequency transceiver, and an application processor capable of communicating with the cellular chip and the processing circuit 140. The first power amplification unit 113 amplifies the received cellular signal and outputs it to a corresponding antenna, such as a cellular antenna. In this embodiment, the first power amplification unit 113 is a power amplification unit for the cellular signal. In this embodiment, at least a portion of the frequency range of the cellular signal is the same as the frequency range of the target wireless signal. Exemplarily, the cellular signal may include at least a high-frequency (HB) band signal. The operating frequency band of the high-frequency band signal is similar to that of WiFi 2.4G and Bluetooth signals. Furthermore, the cellular signal may also include at least one of a low-frequency band and a mid-frequency band.

[0040] The second radio frequency circuit 120 is used to provide a target wireless signal and amplify the target wireless signal before outputting it to a corresponding antenna, such as the first antenna. In this embodiment, the target wireless signal may include at least one of a WiFi signal and a Bluetooth signal. That is, the target WiFi signal may be a WiFi signal, a Bluetooth signal, or a combination of both. It should be noted that in this embodiment, the WiFi signal is a WiFi 2.4G signal. Exemplarily, the second radio frequency circuit 120 may include at least one of a WiFi chip, a Bluetooth chip, and a WiFi & BT chip, as well as an application processor capable of communicating with the WiFi chip, Bluetooth chip, or WiFi & BT chip and the processing circuit 140.

[0041] The first switching circuit 130 is connected to the first communication unit 111, the first power amplifier unit 113, and the second radio frequency circuit 120, respectively, and is used to turn the second radio frequency circuit 120 on or off, and selectively turn on the path for cellular signals and target wireless signals to be transmitted to the first power amplifier unit 113. It can be understood that when the first switching circuit 130 turns on the path between the second radio frequency circuit 120 and the first power amplifier unit 113, it can turn on the path for the target wireless signal to be transmitted to the first power amplifier unit 113. When the first power amplifier unit 113 receives the target wireless signal, it can also support power amplification of the target wireless signal and transmit it to the corresponding antenna (e.g., a Bluetooth or WiFi antenna), which is a different antenna from the cellular antenna. The first power amplifier unit 113 can support power amplification of both cellular signals and target wireless signals. The output power of the first power amplifier unit 113 is lower than the output power of the second radio frequency circuit 120, which can be understood as the output power of the first radio frequency circuit 110 being lower than the output power of the second radio frequency circuit 120.

[0042] Furthermore, the first switching circuit 130 is also connected in series with the second radio frequency circuit 120. When the first switching circuit 130 turns on the second radio frequency circuit 120, that is, when the second radio frequency circuit 120 and its corresponding connected antenna are in the same path, the wireless target signal can be directly amplified by the second radio frequency circuit 120 and output to the corresponding antenna (e.g., a Bluetooth or WiFi antenna). It should be noted that the connection relationship between the first switching circuit 130 and the second radio frequency circuit 120 is not limited to this. Figure 1 , 2 The radio frequency system shown.

[0043] The processing circuit 140 may include one or more processors. For example, the processing circuit 140 includes at least one of a central processing unit (CPU) and an application processor. The processing circuit 140 may be connected to the first radio frequency (RF) circuit 110 and the second RF circuit 120 respectively, and may interact with the first RF circuit 110 and the second RF circuit 120 to obtain information such as the operating status and target transmission power of the first RF circuit 110 and the second RF circuit 120.

[0044] The processing circuit 140 determines the on / off state of the first switching circuit 130 based on the target transmission power of the target wireless signal and the operating state of the first power amplification unit 113, in order to support the transmission of the target wireless signal. Specifically, the processing circuit 140 can determine the on / off state of the first switch based on the target transmission power of the target wireless signal and the operating state of the first power amplification unit 113, and then output a corresponding switch control command to the target transmitting circuit, so that the target transmitting circuit can control the first switching circuit 130 to support the transmission of the target wireless signal. The target transmitting circuit may include at least one of the first transmitting band and the second radio frequency circuit 120 to control the on / off state of the first switching circuit 130. The operating state of the first power amplification unit 113 may include a cellular amplification state and a target wireless amplification state. If the first power amplification unit 113 is currently amplifying the power of a cellular signal, it is in the cellular amplification state; if the first power amplification unit 113 is currently amplifying the power of a target wireless signal, it is in the target wireless amplification state. The first power amplification unit 113 operates in a time-division multiplexing manner between the cellular amplification state and the target wireless amplification state. There are two transmission paths for the target wireless signal. One is that the second radio frequency circuit 120 amplifies the target wireless signal and outputs it. The other is that the target wireless signal is switched to the path where the first power amplification unit 113 is located by the first switching circuit 130, and then amplified by the first power amplification unit 113 before being output.

[0045] In this embodiment, the radio frequency (RF) system includes a first RF circuit, a second RF circuit, a first switching circuit, and a processing circuit. The first RF circuit includes a first communication unit and a first power amplification unit. The first communication unit provides cellular signals, and the first power amplification unit amplifies the received cellular signals and outputs them to the corresponding antenna. The second RF circuit provides target wireless signals and amplifies them before outputting them to the corresponding antenna. The first switching circuit is connected to the first communication unit, the first power amplification unit, and the second RF circuit, respectively, and is used to turn the second RF circuit on or off, and selectively enable the transmission paths of cellular signals and target wireless signals to the first power amplification unit. Thus, the RF system can provide two transmission paths for wireless target signals (Bluetooth or WiFi signals), one of which can reuse the first power amplification unit. The unit amplifies the power of the received wireless target signal. Another path can amplify the power of the wireless target signal based on the second radio frequency circuit. The output power of the transmission path that reuses the first power amplification unit is higher than the transmission power of the second radio frequency circuit. In this way, the radio frequency system can select the appropriate transmission path based on the transmission application scenario of the target wireless signal. For example, in the scenario of high-power transmission of the target wireless signal, the first power amplification unit can be reused to amplify the power of the target wireless signal, so as to achieve high-power output of the target wireless signal. At the same time, the hardware architecture of the radio frequency system is simple, only adding the first switching circuit. The hardware can save the need for an additional external power amplifier, effectively saving cost and area, and well balancing performance, cost and area requirements.

[0046] The processing circuit 140 can determine the on / off state of the first switching circuit 130 based on the target transmission power of the target wireless signal and the operating state of the first power amplification unit 113, thereby determining the transmission path of the target wireless signal. The transmission path of the target wireless signal will be described below in relation to the target transmission power and the operating state of the first power amplification unit 113.

[0047] In one embodiment, the processing circuit 140 is further configured to: when the target transmission power of the target wireless signal is greater than a first preset threshold and the first power amplification unit 113 does not amplify the power of the cellular signal, to enable the first switching circuit 130 to open the path between the second radio frequency circuit 120 and the first power amplification unit 113, and the target wireless signal is output to the corresponding antenna after being amplified by the first power amplification unit 113.

[0048] The first preset threshold can be preset and stored by the processing circuit 140. For example, the processing circuit 140 can set it according to the transmission power range of the first power amplifier unit 113 and the transmission power range of the second radio frequency circuit 120. For example, the first preset threshold can be the maximum transmission power of the second radio frequency circuit 120 to the target wireless signal. For example, if the target wireless signal is a WiFi signal, and the transmission power range of the second radio frequency circuit 120 to the WiFi signal is less than or equal to 18dBm, and the transmission power range of the first power amplifier unit 113 is less than or equal to 22dBm, then the first preset threshold can be 18dBm.

[0049] Specifically, the processing circuit 140 can acquire the target transmission power of the target wireless signal. If the target transmission power is determined to be greater than a first preset threshold, the processing circuit 140 can continue to acquire the operating status of the first power amplification unit 113 in the first radio frequency circuit 110. If the first power amplification unit 113 is not currently operating in cellular amplification mode, that is, if the first power amplification unit 113 is not currently amplifying the cellular signal, the processing circuit 140 can output a switch control signal to the target transmitting circuit to enable the first switch circuit 130 to open the path between the second radio frequency circuit 120 and the first power amplification unit 113. In this case, the target wireless signal can be amplified by the first power amplification unit 113 and then output to the corresponding antenna. In this way, the target wireless signal can reuse the first power amplification unit 113 in the first radio frequency circuit 110 to amplify the target wireless signal, thereby achieving high-power output of the target wireless signal.

[0050] In this embodiment, the first power amplifier unit 113 conventionally uses the highest modulation method of 256QAM, which can effectively cover the transmission performance of WiFi 2.4G, MCS7 and below; at the same time, the output power of the first power amplifier unit 113 can reach more than 28dBm, which is about 5dB higher than the output power of the second radio frequency circuit 120 of 23dBm, so as to enhance the uplink power of the target wireless signal.

[0051] Optionally, the processing circuit 140 is further configured to: when the target transmission power of the target wireless signal is less than a first preset threshold, to turn on the second radio frequency circuit 120 via the first switching circuit 130, and the target wireless signal is amplified by the second radio frequency circuit 120 and then output to the corresponding antenna.

[0052] In this embodiment, when the target transmission power of the target wireless signal is less than the first preset threshold, the output power of the second radio frequency circuit 120 meets the uplink power requirement of the target wireless signal. At this time, the second radio frequency circuit 120 can directly amplify the power and output it to the corresponding antenna, without having to reuse the first power amplification unit 113 of the first radio frequency circuit 110, which can reduce the power consumption of the radio frequency system.

[0053] Optionally, the processing circuit 140 is further configured to, when the first power amplification unit 113 is currently amplifying the cellular signal, turn on the second radio frequency circuit 120 via the first switching circuit 130, and output the target wireless signal to the corresponding antenna after being amplified by the second radio frequency circuit 120.

[0054] In this embodiment, the priority of the first power amplification unit 113 operating in cellular amplification mode is higher than the priority of operating in target signal amplification mode. When the first power amplification unit 113 is currently amplifying the cellular signal (i.e., the first power amplification unit 113 is operating in cellular amplification mode), the target wireless signal cannot reuse the first power amplification unit 113. Instead, the second radio frequency circuit 120 can be turned on by the first switching circuit 130. The target wireless signal is then amplified by the second radio frequency circuit 120 and output to the corresponding antenna. This ensures both the normal transmission of the cellular signal and the transmission of the target wireless signal.

[0055] like Figure 3 As shown, in one embodiment, the second radio frequency circuit 120 includes a second communication unit 121 and a second power amplifier unit 123. The second communication unit 121 provides a target wireless signal. The target wireless transmission signal includes either a Bluetooth signal or a WiFi signal. The second power amplifier unit 123 can be integrated into the second communication unit 121 or independent of it. The connection relationship between the second power amplifier unit 123 and the second communication unit 121 varies slightly depending on the position of the second power amplifier unit 123 relative to the second communication unit 121.

[0056] In this embodiment, the second power amplifier unit 123 is integrated into the second communication unit 121 as an example for explanation. Generally, the second power amplifier unit 123 may include a power amplifier. It should be noted that the second communication unit 121 is generally equipped with a corresponding power amplifier, so there is no need to additionally set up a second power amplifier unit 123 based on the second communication unit 121.

[0057] The first switching circuit 130 is connected to the first communication unit 111, the second communication unit 121, the first power amplifier unit 113, and the first antenna. The first switching circuit 130 is used to select and connect the second communication unit 121 to the first power amplifier unit 113 and the first antenna, and to select and connect the first communication unit 111 to the first power amplifier unit 113. The first antenna is the antenna from which the target wireless signal is amplified by the second radio frequency circuit 120 but not by the first power amplifier unit 113. Therefore, there are two transmission paths for the target wireless signal, specifically a first transmission path and a second transmission path. The first transmission path is: second communication unit 121 → first switching circuit 130 → first antenna. The second transmission path is: second communication unit 121 → first switching circuit 130 → first power amplifier unit 113 → antenna connected to the first power amplifier unit 113.

[0058] The processing circuit 140 can determine the on / off state of the first switching circuit 130 based on the target transmission power of the target wireless signal and the operating state of the first power amplification unit 113. Then, it can transmit the target wireless signal via either the first transmission path or the second transmission path. This allows for the configuration of two transmission paths for the target wireless signal without the need for an additional second power amplification unit 123. The appropriate transmission path can be selected based on the actual communication requirements of the radio frequency system. For example, when the target wireless signal needs to operate in a high-power environment and the first power amplification unit 113 is not currently amplifying the cellular signal, the on / off state of the first switching circuit 130 can be controlled to activate the second transmission path. This allows the first power amplification unit 113 in the first radio frequency circuit 110 to be reused to increase the uplink power of the target wireless signal, meeting the high uplink power requirements and optimizing the user experience under weak signal conditions.

[0059] like Figure 4 As shown, in one embodiment, the first switch circuit 130 may include a first switch 131 and a second switch 132, wherein the first switch 131 and the second switch 132 may each be an SPDT switch. The first T-terminal of the first switch 131 is connected to the first communication unit 111, the second T-terminal of the first switch 131 is connected to the first T-terminal of the second switch 132, the P-terminal of the first switch 131 is connected to the input terminal of the first power amplifier unit 113, the second T-terminal of the second switch 132 is connected to the first antenna, and the P-terminal of the second switch 132 is connected to the second communication unit 121. It should be noted that the specific configuration of the first switch circuit 130 is not limited to the examples described above, and may also be other switch types.

[0060] In related technologies, radio frequency systems can also support the transmission and processing of WiFi signals. Two related technologies are provided below to support the transmission and processing of WiFi signals. Related Technology 1: Directly integrating a power amplifier (iPA) 501 within the WCN chip 50 and outputting it to the radio frequency front-end antenna port, such as... Figure 5a As shown. Related Technology Two: Based on Related Technology One, an external power amplifier 502 is additionally set to amplify power and enhance uplink performance, such as... Figure 5b As shown in the diagram. In one related technology, the WiFi signal is directly output to the RF front-end antenna port through the integrated iPA inside the WCN chip. The output power is relatively low, resulting in weak WiFi signals when the signal penetrates walls or is far from the router. Compared to related technology two, which uses an external power amplifier 502 to amplify the WiFi signal power, the output power is about 2dB lower. Furthermore, due to the greater distance between the WCN chip 50 and the antenna, the wiring insertion loss is large, resulting in an overall transmission performance that is about 4dB worse than that of the external power amplifier. This will affect the user experience under weak signal conditions. In related technology two, an external power amplifier 502 for WiFi 2.4G is added to the front-end RF link, which effectively improves the uplink performance. However, this increases the cost and occupies a larger PCB board area.

[0061] To address the aforementioned technical issues, the radio frequency system provided in this embodiment reuses the first power amplifier unit 113 to enhance the uplink power of the WiFi signal without adding an external power amplifier, thereby meeting the high uplink power requirements and optimizing the user experience under weak signal conditions. At the same time, the hardware architecture of the radio frequency system is simple, only adding the first switching circuit 130, which saves on the external power amplifier, effectively saving cost and area, and well balancing performance, cost, and area requirements.

[0062] For ease of explanation, we will use WiFi as an example.

[0063] The processing circuit 140 can be connected to the second communication unit 121 to obtain the target transmission power of the WiFi signal. If the target transmission power of the WiFi signal is greater than a first preset threshold (e.g., 18dBm), it continues to communicate with the first communication unit 111 to determine whether the cellular signal occupies the first power amplification unit 113. If the cellular signal does not occupy the first power amplification unit 113, the first communication unit 111 controls the first switch 131 to open the path between the second switch 132 and the first power amplification unit 113, and the second communication unit 121 controls the second switch 132 to open the path between the second communication unit 121 and the first switch 131, that is, to open the second transmission path, so that the WiFi signal can reuse the first power amplification unit 113 in the first radio frequency circuit 110 for power amplification, thereby increasing the uplink power of the WiFi signal. In this embodiment, the first power amplifier unit 113 conventionally uses the highest modulation method of 256QAM, which can effectively cover the transmission performance of WiFi 2.4G, MCS7 and below; at the same time, the output power of the first power amplifier unit 113 can reach more than 28dBm, which is about 5dB higher than the output power of the second radio frequency circuit 120 of 23dBm, so as to enhance the uplink power of the target wireless signal.

[0064] The processing circuit 140 can also control the second switch 132 through the second communication unit 121 to open the path between the second communication unit 121 and the first antenna when the cellular signal occupies the first power amplifier unit 113, or when the target transmission power of the WiFi signal is less than or equal to the first preset threshold (e.g., 18dBm), that is, to open the first transmission path and realize the transmission of the WiFi signal.

[0065] It should be noted that when the target wireless signal is a Bluetooth signal, the switching control logic of its first switching circuit 130 is the same as that of the WiFi signal, and will not be described again.

[0066] like Figure 6 and Figure 7 Based on any of the foregoing embodiments, the radio frequency system may include a filter circuit 150. The filter circuit 150 is connected to both the first output terminal of the first power amplifier unit 111 and the output terminal of the second radio frequency circuit 120. In this embodiment, the first power amplifier unit 111 has multiple output terminals. The first output terminal is used to output the amplified target wireless signal, and the other output terminals of the first power amplifier unit 111 can output low-frequency and high-frequency signals other than high-frequency signals. The filter circuit 150 is used to filter out spurious signals other than the target wireless signal and output the filtered signal to the corresponding antenna.

[0067] Optionally, the first power amplification unit provided in this application embodiment can be an RF PA Mid device, an MMPA device, or other devices capable of power amplification processing of high-frequency signals of cellular signals. In this application embodiment, the specific device type of the first power amplification unit is not limited.

[0068] In one embodiment, please continue to refer to Figure 6 The filtering circuit 150 includes a first filtering unit 151 and a second filtering unit 152. The first filtering unit 151 is connected to the first output terminal of the first power amplifier unit 111 and is used to filter out spurious signals other than the target wireless signal, outputting a signal to the first sub-antenna. The second filtering unit 152 is connected to the output terminal of the second radio frequency circuit 120 and is used to filter out spurious signals other than the target wireless signal, outputting a signal to the second sub-antenna. Exemplarily, the first filtering unit 151 and the second filtering unit 152 may each include a filter. When the target wireless signal is a Bluetooth signal, the filter can be a Bluetooth filter; when the target wireless signal is a WiFi signal, the filter can be a WiFi 2.4G filter.

[0069] In this embodiment, the antennas on the first and second transmission paths of the target wireless signal are independent of each other, and each transmission path is provided with a corresponding filtering unit to filter out spurious signals other than the target wireless signal, thereby improving the transmission performance of the target wireless signal.

[0070] Optionally, the second radio frequency circuit 120 further includes a receiving sub-circuit for supporting the reception and processing of the target wireless signal. In this embodiment, the receiving sub-circuit can be configured in the second communication unit 121. The radio frequency system also includes a second switching circuit (not shown in the figure), which is connected to the first filter unit, the second filter unit, the first output terminal of the first power amplifier unit, the output terminal of the second radio frequency circuit, and the receiving sub-circuit. The processing circuit is further configured to: time-division switch the paths between the first sub-antenna and the second sub-antenna and the receiving sub-circuit via the second switching circuit to determine the target antenna of the target wireless signal, where the target antenna is one of the first sub-antenna and the second sub-antenna.

[0071] For example, the second communication unit or processing circuit can switch according to the signal quality of the first sub-antenna and the second sub-antenna. For example, by periodically polling the first sub-antenna and the second sub-antenna, the received signal quality of the first sub-antenna and the second sub-antenna can be detected, such as the Received Signal Strength Indication (RSSI). The antenna with the higher RSSI can be selected as the target antenna for the target wireless signal to support the reception and transmission of the target wireless signal.

[0072] In this embodiment, the radio frequency system can be equipped with two antennas to support the target wireless signal, and the target antenna of the wireless target antenna can be determined by controlling the second switching circuit and based on the signal quality of the two antennas, so as to support the reception and transmission of the wireless target signal and improve the communication performance of the target wireless signal.

[0073] Optionally, unlike the previous embodiments, in this embodiment, the first transmission path and the second transmission path can reuse the same antenna, such as the first antenna. Please refer to [further details]. Figure 7 The filtering circuit 150 includes a third switching unit 153 and a third filtering unit 154. The third switching unit 153 is connected to the first output terminal of the first power amplifier unit 111, the output terminal of the second radio frequency circuit 120, and the first terminal of the third filtering unit 154. The second terminal of the third filtering unit 154 is connected to the first antenna. For example, the third switching unit 153 can be an SPDT switch, with its first T terminal connected to the first output terminal of the first power amplifier unit 111, its second T terminal connected to the output terminal of the second radio frequency circuit 120, its P terminal connected to the first terminal of the third filtering unit 154, and the second terminal of the third filtering unit 154 connected to the first antenna.

[0074] When the target transmission path is determined to be the first transmission path, the first communication unit 111 or the second communication unit 121 can control the third switching unit 153 to connect the second radio frequency circuit 120 to the first antenna. Correspondingly, when the target transmission path is determined to be the first transmission path, the first communication unit 111 or the second communication unit 121 can control the third switching unit 153 to connect the first output terminal of the first power amplifier unit 111 to the first antenna.

[0075] In this embodiment, the filter circuit 150 includes a third switching unit 153 and a third filtering unit 154. By setting the connection relationship between the third switching unit 153, the third filtering unit 154, the first radio frequency circuit 110, the second radio frequency circuit 120 and the first antenna, the first radio frequency circuit 110 and the second radio frequency circuit 120 can time-division multiplex the third filtering unit 154 and the first antenna, thereby reducing the cost of the radio frequency system.

[0076] Unlike the previous embodiments, in the following embodiments, the second radio frequency circuit 120 can provide Bluetooth and WiFi signals. For example... Figure 8As shown, specifically, the second radio frequency circuit 120 includes a second communication unit 121 and a second power amplifier unit 123. The second power amplifier unit 123 is independent of the second communication unit 121; that is, the second power amplifier unit 123 is not integrated within the second communication unit 121. The second communication unit 121 is configured with a first transmitting port for providing Bluetooth signals and a second transmitting port for providing WiFi signals. In this embodiment, the second communication unit 121 may include a WiFi & Bluetooth chip, and may also include an application processor, etc. The second communication unit 121 can output Bluetooth signals through the first transmitting port and WiFi signals through the second transmitting port.

[0077] The second power amplifier unit 123 can be connected to the first transmitting port TX1 and the second transmitting port TX2 of the second communication unit 121 via the first switching circuit 130, respectively. It can amplify the received Bluetooth and WiFi signals and transmit them to the corresponding antennas. Exemplarily, in this embodiment, the second power amplifier unit 123 may include a second power amplifier. The second power amplifier can be understood as an external power amplifier for the second communication unit 121, which can support power amplification of WiFi signals. Since the frequency ranges of WiFi and Bluetooth signals are similar, the Bluetooth signal can reuse the external power amplifier; that is, the second power amplifier can also support power amplification of Bluetooth signals.

[0078] The first switching circuit 130 is connected to the first communication unit 111, the first transmitting port TX1, the second transmitting port TX2, the first power amplifier unit 113, and the second power amplifier unit 123, respectively. The first switching circuit 130 is used to select the path for transmitting the target wireless signal to the first power amplifier unit 113 and the second power amplifier unit 123, select the path between the first communication unit 111 and the first power amplifier unit 113, and select the path between the first transmitting port TX1, the second transmitting port TX2, and the second power amplifier unit 123, respectively.

[0079] In this embodiment, the target wireless signal can be a Bluetooth signal or a WiFi signal, and its transmission path remains two. Alternatively, the target wireless signal can also include both Bluetooth and WiFi signals, each with its own transmission path. When the target wireless signal includes both Bluetooth and WiFi signals, the first power amplifier unit 113 can be time-division multiplexed. Since the transmission power of different transmission paths is different, the processing circuit 140 can determine the conduction state of the first switching circuit 130 based on the target transmission power of the target wireless signal and the operating state of the first power amplifier unit 113, thereby determining the target transmission path of the target wireless signal. This allows the use of a target transmission path adapted to the current communication requirements to transmit the target wireless signal. The radio frequency system can be applied to different scenarios. Selecting a high-power output target transmission path can improve the uplink communication performance of the target wireless signal, while selecting a low-power output target transmission path can reduce power consumption while still meeting the uplink communication requirements of the target wireless signal.

[0080] The radio frequency system provided in this embodiment can provide both Bluetooth and WiFi signals through the second communication unit 121. By setting the connection relationship between the first switch circuit 130 and the first communication unit 111, the second communication unit 121, the first power amplifier unit 113, and the second power amplifier unit 123, and by reusing the original first power amplifier unit 113 (high-frequency power amplifier for cellular signals) and second power amplifier unit 123 (external power amplifier for WiFi signals) in the radio frequency system, the radio frequency system can also support multiple working modes, such as cellular communication mode, Bluetooth communication mode, WiFi working mode, simultaneous Bluetooth and WiFi communication mode, and simultaneous cellular and Bluetooth communication mode. This can expand the communication function of the radio frequency system while reducing the hardware cost of the radio frequency system.

[0081] Bluetooth communication is one of the key communication technologies for communication devices. Among related technologies, radio frequency systems can also support the transmission and processing of Bluetooth signals. The following are three related technologies to support the transmission and processing of Bluetooth signals. Related Technology 1: (e.g., ...) Figure 9a As shown, the Bluetooth signal is directly amplified by the power amplifier iPA901 integrated within the Bluetooth chip 90 before being output to the RF front-end antenna port. Compared to an external power amplifier, the linearity of the internally integrated power amplifier is worse, and the maximum output power is about 2dB lower. Furthermore, because it is difficult to ensure the Bluetooth chip is placed close to the antenna, the circuit board trace insertion loss is greater. Therefore, the overall transmission performance is about 3dB worse than that of an external power amplifier. This solution cannot support the high-power transmission performance requirements of Bluetooth. Related Technology Two: Figure 9bAs shown, the Bluetooth signal is multiplexed using an external power amplifier 902 that also supports WiFi signals, and the WiFi signal is time-division multiplexed via a switch. This solution allows the Bluetooth signal to utilize the external power amplifier 902 of the WiFi signal to enhance uplink power, meeting high-power transmission performance requirements. However, WiFi and Bluetooth signals need to be used in a time-division manner and cannot be used simultaneously. In scenarios where WiFi and Bluetooth signals communicate simultaneously, their latency, throughput, and other performance characteristics will significantly decrease. The most typical scenario is when using Bluetooth headsets over a WiFi network; the time-division mechanism leads to problems such as high latency, stuttering, and audio-visual asynchrony. Related technical solution three: such as... Figure 9c As shown, adding an external power amplifier 903 to the Bluetooth signal can effectively improve Bluetooth transmission performance, but it increases the cost and layout area significantly, which does not meet the current cost and area optimization requirements of communication equipment.

[0082] In summary, current Bluetooth RF front-end solutions each have their advantages and disadvantages, failing to balance performance, cost, area, and performance degradation issues when coexisting with WiFi signals. Therefore, the RF system provided in this application can solve the aforementioned technical problems. It allows the Bluetooth signal to reuse the first power amplifier unit 113 (e.g., a cellular high-frequency power amplifier HB PA) and the second power amplifier unit 123 (an external WiFi power amplifier WiFi PA). This means that switching between the two power amplifiers enhances the uplink Bluetooth signal, improving Bluetooth uplink performance by approximately 3dB, while simultaneously addressing the performance degradation issue in scenarios where Bluetooth and WiFi signals coexist. Furthermore, the RF system has a simple hardware architecture, requiring only the addition of a first switching circuit 130, which eliminates the need for an external Bluetooth power amplifier, effectively saving cost and area, and achieving a good balance between performance, cost, and area requirements.

[0083] For ease of explanation, we will use Bluetooth as an example to illustrate the concept.

[0084] The first switching circuit 130 is connected to the first communication unit 111, the first transmitting port TX1, the second transmitting port TX2, the first power amplifier unit 113, and the second power amplifier unit 123, respectively. It can be used to select and connect the first transmitting port TX1 to the first power amplifier unit 113 and the second power amplifier unit 123, select and connect the first communication unit 111 to the first power amplifier unit 113, and select and connect the first transmitting port TX1, the second transmitting port TX2 and the second power amplifier unit 123, respectively.

[0085] The processing circuit 140 is further configured to: determine the on / off state of the first switching circuit 130 according to the target operating mode of the radio frequency system, wherein the target operating mode includes at least one of Bluetooth communication mode, Bluetooth and WiFi simultaneous communication mode, and cellular and Bluetooth simultaneous communication mode.

[0086] In one embodiment, the Bluetooth communication mode can be understood as a Bluetooth standalone transmission mode. The Bluetooth mode may include a first Bluetooth communication mode and a second Bluetooth communication mode that operate in a time-division multiplexing manner. The Bluetooth signal transmission power corresponding to the first Bluetooth communication mode is lower than that corresponding to the second Bluetooth communication mode. The first Bluetooth communication mode corresponds to a first Bluetooth transmission path, and the second Bluetooth communication mode corresponds to a second Bluetooth transmission path. The first Bluetooth transmission path is: first RF port → first switching circuit 130 → second power amplifier unit 123 → antenna connected to the second power amplifier unit 123; the second Bluetooth transmission path is: first RF port → first switching circuit 130 → first power amplifier unit 113 → antenna connected to the first power amplifier unit 113.

[0087] In this embodiment, the radio frequency system can determine the target operating mode based on Bluetooth uplink communication requirements (e.g., power requirements). For example, when the radio frequency system's Bluetooth communication requires high power, the target operating mode can be determined as a second Bluetooth operating mode, and the on / off state of the first switching circuit 130 can be determined to conduct the second Bluetooth transmission path. Correspondingly, when the radio frequency system's Bluetooth communication requires low power, the target operating mode can be determined as a first Bluetooth operating mode, and the on / off state of the first switching circuit 130 can be determined to conduct the first Bluetooth transmission path.

[0088] For further information, please continue to refer to [link / reference]. Figure 8 The first switching circuit 130 includes a first switching unit 133 and a second switching unit 134. A first terminal of the first switching unit 133 is connected to the first communication unit 111, a second terminal of the first switching unit 133 is connected to a first terminal of the second switching unit 134, and the second terminal of the first switching unit 133 is connected to the input terminal of the first power amplifier unit 113. The other first terminal of the second switching unit 134 is connected to the input terminal of the second power amplifier unit 123, and the two second terminals of the second switching unit 134 are respectively connected to the first transmission port TX1 and the second transmission port TX2.

[0089] In this embodiment, the first switching unit 133 may include a third switch, such as an SPDT switch. The second switching unit 134 may include a fourth switch and a fifth switch; exemplarily, the fourth and fifth switches may each be an SPDT switch. In this embodiment, the third, fourth, and fifth switches are each an SPDT switch for illustration. The P terminal of the third switch is connected to the input of the first power amplifier unit 113; the first T terminal of the third switch is connected to the first communication unit 111; the second T terminal of the third switch is connected to the first T terminal of the fourth switch; the second T terminal of the fourth switch is connected to the first T terminal of the fifth switch; the P terminal of the fourth switch is connected to the first transmission port TX1; the second T terminal of the fifth switch is connected to the second transmission port TX2; and the P terminal of the fifth switch is connected to the input of the second power amplifier unit 123.

[0090] The processing circuit 140 is further configured to: when the target operating mode is the first Bluetooth communication mode, to cause the first switching circuit 130 to open the radio frequency path between the first transmitting port TX1 and the second power amplifier unit 123, and to disconnect the radio frequency path between the second transmitting port TX2 and the second power amplifier unit 123. Specifically, when the target operating mode is determined to be the first Bluetooth operating mode, the second communication unit 121 can provide Bluetooth signals, and also causes the fourth switch to open the path between the second T terminal and the P terminal, and the fifth switch to open the path between the first T terminal and the P terminal, so as to conduct the first Bluetooth transmission path. In addition, the first communication unit 111 stops providing cellular signals.

[0091] The processing circuit 140 is further configured to: when the target operating mode is the second Bluetooth communication mode, to cause the first switch circuit 130 to open the radio frequency path between the first transmitting port TX1 and the first power amplifier unit 113, and to disconnect the radio frequency path between the first communication unit 111 and the first power amplifier unit 113. Specifically, when the target operating mode is determined to be the second Bluetooth operating mode, the second communication unit 121 can provide Bluetooth signals and stop providing WiFi signals, and also causes the fourth switch to open the path between the first T terminal and the P terminal, and the third switch to open the path between the second T terminal and the P terminal, so as to open the second Bluetooth transmission path.

[0092] When the radio frequency system operates in the second Bluetooth communication mode, since the operating frequency band of the high-frequency band of the cellular signal is close to that of the Bluetooth signal, the Bluetooth signal can reuse the power amplifier in the first power amplifier unit 113, which is a power amplifier for the high-frequency band of the cellular signal. Because the main modulation methods of Bluetooth are Gaussian frequency shift keying (GFSK) and π / 4 offset differential quadrature phase shift keying (QPSK),... There are three modulation methods: rotated differential quadrature phase shift keying (π / 4-DPSK), 8-state differential phase shift keying (8DPSK), and the highest modulation method commonly used in the power amplifier of cellular high-frequency signals is 256QAM. The performance of the power amplifier of cellular high-frequency signals can cover the performance requirements of Bluetooth communication. At the same time, the maximum output power of the power amplifier of cellular high-frequency signals can reach more than 28dBm, which can effectively meet the high power requirements of Bluetooth uplink signals and has stronger uplink performance than the first Bluetooth transmission path.

[0093] Optionally, unlike the aforementioned embodiments, the radio frequency system can also support simultaneous communication of WiFi and Bluetooth. The processing circuit 140 is further configured to: when the target operating mode is simultaneous Bluetooth and WiFi communication mode, to cause the first switch circuit 130 to open the radio frequency path between the first transmitting port TX1 and the first power amplifier unit 113, and to disconnect the radio frequency path between the first communication unit 111 and the first power amplifier unit 113; and to open the radio frequency path between the second transmitting port TX2 and the second power amplifier unit 123. Specifically, when the target operating mode is determined to be simultaneous Bluetooth and WiFi communication mode, the second communication unit 121 can simultaneously provide Bluetooth and WiFi signals. Furthermore, the third switch opens the path between the second T terminal and the P terminal, the fourth switch opens the path between the first T terminal and the P terminal, thus opening the second Bluetooth transmission path, and simultaneously, the fifth switch opens the path between the second T terminal and the P terminal, thus opening the WiFi signal transmission path.

[0094] Optionally, unlike the aforementioned embodiments, the radio frequency system can also support simultaneous cellular and Bluetooth communication. The processing circuit 140 is further configured to: when the target operating mode is simultaneous cellular and Bluetooth communication, to cause the first switching circuit 130 to open the radio frequency path between the first communication unit 111 and the first power amplifier unit 113, and to disconnect the radio frequency path between the first transmitting port TX1 and the first power amplifier unit 113; and to control the first switching circuit 130 to open the radio frequency path between the first transmitting port TX1 and the second power amplifier unit 123, and to disconnect the radio frequency path between the second transmitting port TX2 and the second power amplifier unit 123. Specifically, when the target operating mode is determined to be simultaneous cellular and Bluetooth communication, the first communication unit 111 provides a cellular signal, the second communication unit 121 provides a Bluetooth signal, and a third switch is also made to open the path between the first T terminal and the P terminal to conduct the cellular signal transmission path; simultaneously, a fourth switch opens the path between the second T terminal and the P terminal, and a fifth switch opens the path between the first T terminal and the P terminal to conduct the first Bluetooth transmission path.

[0095] Optionally, the operating modes of the radio frequency system may also include WiFi communication mode and cellular communication mode.

[0096] The processing circuit 140 is further configured to, when the target operating mode is WiFi communication mode, cause the first switching circuit 130 to open the radio frequency path between the second transmitting port TX2 and the second power amplifier unit 123, and disconnect the radio frequency path between the first transmitting port TX1 and the second power amplifier unit 123. Specifically, when the target operating mode is determined to be WiFi communication mode, the second communication unit 121 provides a WiFi signal. In addition, the fifth switch opens the path between the second T terminal and the P terminal, thus opening the WiFi transmission path. Furthermore, the first communication unit 111 stops providing cellular signals.

[0097] The processing circuit 140 is further configured to, when the target operating mode is cellular communication, cause the first switching circuit 130 to open the radio frequency path between the first communication unit 111 and the first power amplifier unit 113, and disconnect the radio frequency path where the second power amplifier unit 123 is located. Specifically, when the target operating mode is determined to be cellular communication mode, the first communication unit 111 provides cellular signals, the second communication unit 121 can stop providing Bluetooth and WiFi signals, and in addition, the third switch is also made to open the path between the first T terminal and the P terminal to open the transmission path of the cellular signal.

[0098] In one embodiment, based on the foregoing embodiments, the target wireless signal of the radio frequency system in this embodiment includes Bluetooth and WiFi signals. That is, in addition to supporting multiple operating modes as described in the foregoing embodiments, such as a first Bluetooth communication mode, a second Bluetooth communication mode, a first WiFi communication mode, a second WiFi communication mode, a simultaneous Bluetooth and WiFi communication mode, and a simultaneous cellular and Bluetooth communication mode, the radio frequency system can also support two WiFi communication modes, such as a first WiFi communication mode and a second WiFi communication mode. The WiFi signal transmission power corresponding to the first WiFi communication mode is lower than that corresponding to the second WiFi communication mode. Furthermore, the second WiFi communication mode and the second Bluetooth communication mode are not synchronized.

[0099] like Figure 10As shown, in this embodiment, the first switching circuit 130 is used to select and connect the first transmitting port TX1, the second transmitting port TX2, the first communication unit 111, and the first power amplifier unit 113, respectively, and to select and connect the first transmitting port TX1, the second transmitting port TX2, and the second power amplifier unit 123, respectively. Specifically, the first switching unit 133 may include a sixth switch, such as an SPDT switch. The second switching unit 134 may include a seventh switch; exemplarily, the seventh switch may be a DPDT switch. In this embodiment, the sixth switch is an SPDT switch, and the seventh switch may be a DPDT switch, as an example for explanation.

[0100] The P terminal of the sixth switch is connected to the input of the first power amplifier unit 113, the first T terminal of the sixth switch is connected to the first communication unit 111, the second T terminal of the sixth switch is connected to the first P terminal of the seventh switch, the second P terminal of the seventh switch is connected to the input of the second power amplifier unit 123, the first T terminal of the seventh switch is connected to the first transmission port TX1, and the second T terminal of the seventh switch is connected to the second transmission port TX2.

[0101] The following explanation uses the target operating modes of the radio frequency system, including a first WiFi communication mode, a second WiFi communication mode, and a simultaneous Bluetooth and WiFi communication mode, as examples. It should be noted that the first WiFi communication mode and the second WiFi communication mode can be understood as WiFi-only transmission modes. The WiFi signal transmission power corresponding to the first WiFi communication mode is lower than that corresponding to the second WiFi communication mode. The first WiFi communication mode corresponds to a first WiFi transmission path, and the second WiFi communication mode corresponds to a second WiFi transmission path. The first WiFi transmission path is: second radio frequency port → first switching circuit 130 → second power amplifier unit 123 → antenna connected to the second power amplifier unit 123; the second WiFi transmission path is: second radio frequency port → first switching circuit 130 → first power amplifier unit 113 → antenna connected to the first power amplifier unit 113.

[0102] In this embodiment, the radio frequency (RF) system can determine the target operating mode based on WiFi uplink communication requirements (e.g., power requirements). For example, when the RF system's WiFi communication requires high power, the target operating mode can be determined as a second WiFi operating mode, and the on / off state of the first switching circuit 130 can be determined to conduct the second WiFi transmission path. Correspondingly, when the RF system's WiFi communication requires low power, the target operating mode can be determined as a first WiFi operating mode, and the on / off state of the first switching circuit 130 can be determined to conduct the first WiFi transmission path.

[0103] The processing circuit 140 is further configured to, when the target operating mode is the first WiFi communication mode, cause the first switching circuit 130 to open the radio frequency path between the second transmitting port TX2 and the second power amplifier unit 123. Specifically, when the target operating mode is determined to be the first WiFi operating mode, the second communication unit 121 can provide WiFi signals, stops providing Bluetooth signals, and also causes the seventh switch to open the path between the second T terminal and the second P terminal to open the first WiFi transmission path. In addition, the first communication unit 111 stops providing cellular signals.

[0104] The processing circuit 140 is further configured to: when the target operating mode is the second WiFi communication mode, to cause the first switch circuit 130 to open the radio frequency path between the second transmitting port TX2 and the first power amplifier unit 113, and to disconnect the radio frequency path between the first communication unit 111 and the first power amplifier unit 113. Specifically, when the target operating mode is determined to be the second WiFi operating mode, the second communication unit 121 can provide WiFi signals and stop providing WiFi signals, and also causes the seventh switch to open the path between the first T terminal and the second P terminal, and the sixth switch to open the path between the second T terminal and the P terminal, so as to open the second WiFi transmission path.

[0105] The simultaneous Bluetooth and WiFi communication mode has multiple sub-modes. In different sub-modes, WiFi signals and Bluetooth signals can be time-division multiplexed using the first power amplifier unit 113. The transmission power of WiFi signals and Bluetooth signals is different in different sub-modes.

[0106] The processing circuit 140 is further configured to, when the target operating mode is the first sub-mode, cause the first switching circuit 130 to open the radio frequency path between the first transmitting port TX1 and the first power amplifier unit 113, and the radio frequency path between the second transmitting port TX2 and the second power amplifier unit 123. Specifically, the radio frequency system can determine the target operating mode as the first sub-mode when the transmission power of the WiFi signal is less than the transmission power of the Bluetooth signal. In this mode, the second communication unit 121 can simultaneously provide Bluetooth and WiFi signals, and also causes the seventh switch to open the path between the first T terminal and the first P terminal, the path between the second T terminal and the second P terminal, and the sixth switch to open the path between the second T terminal and the P terminal, so as to support the simultaneous transmission of WiFi and Bluetooth signals.

[0107] The processing circuit 140 is further configured to, when the target operating mode is the second sub-mode, enable the first switching circuit 130 to conduct the radio frequency path between the first transmitting port TX1 and the second power amplifier unit 123, and the radio frequency path between the second transmitting port TX2 and the first power amplifier unit 113. Specifically, the radio frequency system can determine the target operating mode as the second sub-mode when the transmission power of the WiFi signal is greater than the transmission power of the Bluetooth signal. In this mode, the second communication unit 121 can simultaneously provide Bluetooth and WiFi signals, and also enables the seventh switch to conduct the path between the second T terminal and the first P terminal, the path between the first T terminal and the second P terminal, and the sixth switch to conduct the path between the second T terminal and the P terminal, so as to support the simultaneous transmission of WiFi and Bluetooth signals.

[0108] The working principles of other operating modes of the radio frequency system provided in this embodiment can be referred to the foregoing description, and will not be repeated here.

[0109] Optionally, such as Figure 11 , 12 As shown, the filter circuit 150 in the foregoing embodiment can also be applied to, for example... Figure 8-10 The specific filtering function and control logic of the third switching unit 153 in the radio frequency system shown can be found in the relevant descriptions in the foregoing embodiments, and will not be repeated here.

[0110] Optionally, the second communication unit is also configured with a receiving port RX, which can be connected to the filtering circuit 150 to receive the target wireless signal and realize the reception of the target wireless signal.

[0111] Please continue to refer to this. Figure 12 Based on the radio frequency system including the first filtering unit 151 and the second filtering unit 152, the radio frequency system may further include a second switching circuit 160. Furthermore, the second communication unit 121 is also configured with a receiving port RX for receiving wireless target signals. For ease of explanation, the target wireless signal is taken as a Bluetooth signal as an example. The second switching circuit 160 can be connected to the first filtering unit, the second filtering unit, the first output terminal of the first power amplifier unit, and the output terminal of the second power amplifier unit, respectively. It can time-division multiplex the first Bluetooth transmission path, the second Bluetooth transmission path, and the two Bluetooth receiving paths of the Bluetooth signal.

[0112] For example, the second communication unit or processing circuit can switch according to the signal quality of the Bluetooth signals received by the first sub-antenna and the second sub-antenna respectively. For example, by periodically turning on the receiving path where the first sub-antenna and the second sub-antenna are located, detecting the RSSI of the first sub-antenna and the second sub-antenna, and selecting the antenna with the higher RSSI as the target antenna for Bluetooth, so as to support the reception and transmission of Bluetooth.

[0113] In this embodiment, the radio frequency system can be equipped with two antennas to support Bluetooth, and the target antenna for Bluetooth can be determined by controlling the second switching circuit and based on the signal quality of the two antennas, so as to support the reception and transmission of Bluetooth and improve the communication performance of Bluetooth.

[0114] This application also provides a communication device, including the radio frequency system of any of the above embodiments. The communication device includes a first radio frequency circuit, a second radio frequency circuit, a first switching circuit, and a processing circuit. The first radio frequency circuit includes a first communication unit and a first power amplification unit. The first communication unit provides a cellular signal, and the first power amplification unit amplifies the received cellular signal and outputs it to a corresponding antenna. The second radio frequency circuit provides a target wireless signal and amplifies the target wireless signal before outputting it to a corresponding antenna. The first switching circuit is connected to the first communication unit, the first power amplification unit, and the second radio frequency circuit, respectively, and is used to turn the second radio frequency circuit on or off, and selectively turn on the path for the cellular signal and the target wireless signal to be transmitted to the first power amplification unit. Thus, the radio frequency system can provide two transmission paths for the wireless target signal (Bluetooth or WiFi signal), one of which can reuse the first power amplification unit. The unit amplifies the power of the received wireless target signal. Another path can amplify the power of the wireless target signal based on the second radio frequency circuit. The output power of the transmission path that reuses the first power amplification unit is higher than the transmission power of the second radio frequency circuit. In this way, the radio frequency system can select the appropriate transmission path based on the transmission application scenario of the target wireless signal. For example, in the scenario of high-power transmission of the target wireless signal, the first power amplification unit can be reused to amplify the power of the target wireless signal, so as to achieve high-power output of the target wireless signal. At the same time, the hardware architecture of the radio frequency system is simple, only adding the first switching circuit. The hardware can save the need for an additional external power amplifier, effectively saving cost and area, and well balancing performance, cost and area requirements.

[0115] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A radio frequency system, characterized in that, include: The first radio frequency circuit includes a first communication unit and a first power amplification unit, wherein the first communication unit is used to provide cellular signals, and the first power amplification unit is used to amplify the received cellular signals and target wireless signals and output them to the corresponding antennas. The second radio frequency circuit is used to provide a target wireless signal and amplify the target wireless signal before outputting it to the corresponding antenna; the output power of the first radio frequency circuit is lower than the output power of the second radio frequency circuit; the target wireless transmission signal includes at least one of Bluetooth signal and WiFi signal; The first switching circuit is connected to the first communication unit, the first power amplifier unit, and the second radio frequency circuit respectively, and is used to turn on or off the second radio frequency circuit, and to selectively turn on the path of the cellular signal and the target wireless signal to the first power amplifier unit. The processing circuit is connected to the first radio frequency circuit and the second radio frequency circuit respectively, and is used to determine the on / off state of the first switching circuit according to the target transmission power of the target wireless signal and the operating state of the first power amplification unit, so as to support the transmission of the target wireless signal.

2. The radio frequency system according to claim 1, characterized in that, The processing circuit is further configured to: When the target transmission power of the target wireless signal is greater than a first preset threshold and the first power amplification unit does not amplify the power of the cellular signal, the first switching circuit is used to open the path between the second radio frequency circuit and the first power amplification unit, and the target wireless signal is output to the corresponding antenna after being amplified by the first power amplification unit.

3. The radio frequency system according to claim 1, characterized in that, The processing circuit is further configured to: When the target transmission power of the target wireless signal is less than a first preset threshold, the first switching circuit is turned on to activate the second radio frequency circuit, and the target wireless signal is amplified by the second radio frequency circuit and then output to the corresponding antenna.

4. The radio frequency system according to claim 1, characterized in that, The processing circuit is further configured to: When the first power amplification unit is currently amplifying the power of the cellular signal, the first switching circuit is turned on to activate the second radio frequency circuit, and the target wireless signal is amplified by the second radio frequency circuit and then output to the corresponding antenna.

5. The radio frequency system according to claim 1, characterized in that, The second radio frequency circuit includes: The second communication unit is used to provide the target wireless signal; the target wireless transmission signal includes either a Bluetooth signal or a WiFi signal. The second power amplifier unit, integrated in the second communication unit, is used to amplify the power of the received target wireless signal; The first switching circuit is connected to the first communication unit, the second communication unit, the first power amplification unit, and the first antenna respectively. The first switching circuit is used to select and connect the paths between the second communication unit and the first power amplification unit and the first antenna respectively, and to select and connect the path between the first communication unit and the first power amplification unit. The first antenna is the antenna in which the target wireless signal is amplified by the second radio frequency circuit and is output without being amplified by the first power amplification unit.

6. The radio frequency system according to claim 5, characterized in that, The first switching circuit includes a first switch and a second switch, wherein the first T terminal of the first switch is connected to the first communication unit, the second T terminal of the first switch is connected to the first T terminal of the second switch, the P terminal of the first switch is connected to the input terminal of the first power amplifier unit, the second T terminal of the second switch is connected to the first antenna, and the P terminal of the second switch is connected to the second communication unit.

7. The radio frequency system according to claim 1, characterized in that, The second radio frequency circuit includes: The second communication unit is configured with a first transmission port for providing the Bluetooth signal and a second transmission port for providing the WiFi signal; The second power amplifier unit, independent of the second communication unit, amplifies the power of the received WiFi and Bluetooth signals and transmits them to the corresponding antennas. The first switching circuit is connected to the first communication unit, the first transmitting port, the second transmitting port, the first power amplification unit, and the second power amplification unit, respectively. The first switching circuit is used to select the path for transmitting the target wireless signal to the first power amplification unit and the second power amplification unit, select the path between the first communication unit and the first power amplification unit, and select the path between the first transmitting port, the second transmitting port, and the second power amplification unit, respectively.

8. The radio frequency system according to claim 7, characterized in that, The Bluetooth signal is the target wireless signal; wherein, the first switching circuit is used to select and connect the path between the first transmitting port and the first power amplification unit and the second power amplification unit respectively, select and connect the path between the first communication unit and the first power amplification unit, and select and connect the path between the first transmitting port and the second transmitting port and the second power amplification unit respectively. The processing circuit is further configured as follows: Based on the target operating mode of the radio frequency system, the on / off state of the first switching circuit is determined. The target operating mode includes at least one of the following: Bluetooth communication mode, simultaneous Bluetooth and WiFi communication mode, and simultaneous cellular and Bluetooth communication mode.

9. The radio frequency system according to claim 8, characterized in that, The Bluetooth communication modes include a first Bluetooth communication mode and a second Bluetooth communication mode that operate in a time-division multiplexing manner. The Bluetooth signal transmission power corresponding to the first Bluetooth communication mode is lower than the Bluetooth signal transmission power corresponding to the second Bluetooth communication mode. The processing circuit is further configured as follows: When the target operating mode is the first Bluetooth communication mode, the first switching circuit is used to connect the radio frequency path between the first transmitting port and the first power amplifier unit, and disconnect the radio frequency path between the first communication unit and the first power amplifier unit. When the target operating mode is the second Bluetooth communication mode, the first switching circuit is used to connect the radio frequency path between the first transmitting port and the second power amplifier unit, and disconnect the radio frequency path between the second transmitting port and the second power amplifier unit.

10. The radio frequency system according to claim 8, characterized in that, The processing circuit is further configured as follows: When the target operating mode is the simultaneous communication mode of Bluetooth and WiFi, the first switching circuit is used to turn on the radio frequency path between the first transmitting port and the first power amplifier unit, and to disconnect the radio frequency path between the first communication unit and the first power amplifier unit. And to establish the radio frequency path between the second transmitting port and the second power amplification unit.

11. The radio frequency system according to claim 8, characterized in that, The processing circuit is further configured as follows: When the target operating mode is the simultaneous cellular and Bluetooth communication mode, the first switching circuit is used to connect the radio frequency path between the first communication unit and the first power amplifier unit, and disconnect the radio frequency path between the first transmitting port and the first power amplifier unit. And control the first switching circuit to turn on the radio frequency path between the first transmitting port and the second power amplifier unit, and to turn off the radio frequency path between the second transmitting port and the second power amplifier unit.

12. The radio frequency system according to claim 8, characterized in that, The target operating mode also includes a WiFi communication mode and a cellular communication mode, and the processing circuit is further configured as follows: When the target operating mode is the WiFi communication mode, the first switching circuit is used to connect the radio frequency path between the second transmitting port and the second power amplifier unit, and disconnect the radio frequency path between the first transmitting port and the second power amplifier unit. When the target operating mode is cellular communication, the first switching circuit is used to connect the radio frequency path between the first communication unit and the first power amplifier unit, and disconnect the radio frequency path where the second power amplifier unit is located.

13. The radio frequency system according to claim 7, characterized in that, The target wireless signal includes the Bluetooth signal and the WiFi signal; wherein... The first switching circuit is used to select and connect the first transmitting port, the second transmitting port, the first communication unit and the first power amplifier unit respectively, and to select and connect the first transmitting port and the second transmitting port and the second power amplifier unit respectively. The processing circuit is further configured as follows: Based on the target operating mode of the radio frequency system, the on / off state of the first switching circuit is determined. The target operating mode includes at least one of the following: a first Bluetooth communication mode, a second Bluetooth communication mode, a first WiFi communication mode, a second WiFi communication mode, a simultaneous Bluetooth and WiFi communication mode, and a simultaneous cellular and Bluetooth communication mode. The Bluetooth signal transmission power corresponding to the first Bluetooth communication mode is lower than the Bluetooth signal transmission power corresponding to the second Bluetooth communication mode. The WiFi signal transmission power corresponding to the first WiFi communication mode is lower than the WiFi signal transmission power corresponding to the second WiFi communication mode.

14. The radio frequency system according to claim 7, characterized in that, The first switching circuit includes: a first switching unit and a second switching unit, wherein, A first terminal of the first switching unit is connected to the first communication unit, a second terminal of the first switching unit is connected to a first terminal of the second switching unit, and the second terminal of the first switching unit is connected to the input terminal of the first power amplifier unit. The other first terminal of the second switching unit is connected to the input terminal of the second power amplifier unit, and the two second terminals of the second switching unit are respectively connected to the first transmitting port and the second transmitting port.

15. The radio frequency system according to claim 1, characterized in that, The radio frequency system also includes: The filtering circuit is connected to the first output terminal of the first power amplifier unit and the output terminal of the second radio frequency circuit, respectively, and is used to filter out stray signals other than the target wireless signal. The first output terminal of the first power amplifier unit is used to output the filtered target wireless signal.

16. The radio frequency system according to claim 15, characterized in that, The filtering circuit includes: The first filtering unit is connected to the first output terminal of the first power amplification unit and is used to filter out spurious signals other than the target wireless signal, so as to output a signal to the first sub-antenna. The second filtering unit is connected to the output of the second radio frequency circuit and is used to filter out spurious signals other than the target wireless signal so as to output a signal to the second sub-antenna.

17. The radio frequency system according to claim 15, characterized in that, The filtering circuit includes a third switching unit and a third filtering unit; wherein the third switching unit is connected to the first output terminal of the first power amplifier unit, the output terminal of the second radio frequency circuit, and the first terminal of the third filtering unit, and the second terminal of the third filtering unit is connected to the first antenna.

18. The radio frequency system according to claim 16, characterized in that, The second radio frequency circuit further includes a receiving sub-circuit for supporting the reception and processing of target wireless signals, wherein the radio frequency system further includes: The second switching circuit is connected to the first filter unit, the second filter unit, the first output terminal of the first power amplifier unit, the output terminal of the second radio frequency circuit, and the receiving sub-circuit, respectively. The processing circuit is further configured to: The second switching circuit uses a time-division switching mechanism to connect the first sub-antenna and the second sub-antenna to the receiving sub-circuit, thereby determining the target antenna of the target wireless signal, wherein the target antenna is one of the first sub-antenna and the second sub-antenna.

19. A communication device, characterized in that, Including the radio frequency system as described in any one of claims 1-18.

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