Amplification circuit, electronic device, and radio frequency transceiving method

Abstract

The amplification circuit, the electronic device and the radio frequency transceiving method can realize a radio frequency front end scheme with bidirectional amplification, bypass and power detection function of receiving and transmitting state multiplexing one radio frequency channel. Through power detection, the reasonable switching of transmitting, receiving and bypass state is controlled, the appropriate processing of the signal is realized, and the signal is amplified to compensate the loss of the signal when the received signal is weak or the transmitted signal is damaged. When the received signal is large, the signal can also skip the amplification module to avoid signal distortion caused by excessive amplification and ensure the call quality of the electronic device. Multiplexing one radio frequency channel can also simplify the circuit structure, reduce the layout area and reduce the development cost.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to amplifier circuits, electronic devices and radio frequency transceiver methods. Background Technology

[0002] To reduce inter-antenna interference and adapt to changes in the form factor of electronic devices, some electronic devices employ solutions such as extending the antenna / RF front-end module. However, with such solutions, the increased distance between the RF unit and the antenna leads to increased path loss, which reduces the device's ability to receive signals and degrades its transmit power, thus affecting communication quality.

[0003] Therefore, how to improve the receiving and transmitting capabilities of equipment when using solutions such as extending the antenna distance is a question worth considering. Summary of the Invention

[0004] This application provides an amplifier circuit, electronic equipment, and RF transceiver method, enabling an RF front-end solution with bidirectional amplification, bypass, and power detection functions that reuses a single RF path for both receiving and transmitting states. Power detection controls the appropriate switching between transmitting, receiving, and bypass states, allowing for proper signal processing. When the received signal is weak or the transmitted signal is damaged, the signal is amplified to compensate for the loss. Furthermore, when the received signal is strong, the signal can bypass the amplification module, preventing excessive amplification and distortion, thus ensuring 100% call quality for the electronic equipment. Reusing a single RF path also simplifies the circuit structure, reduces board area, and lowers development costs.

[0005] In a first aspect, this application provides an electronic device, which includes: a radio frequency front-end module, an amplification unit, and an antenna;

[0006] The transmit / receive path between the RF front-end module and the antenna is multiplexed by a single RF path, which includes the amplification unit connected between the RF front-end module and the antenna. The amplification unit is used to amplify the power of the signal received by the antenna and the signal transmitted by the RF front-end module.

[0007] In this way, electronic devices can amplify signals bidirectionally, integrating receiving and transmitting amplification functions into a single radio frequency path. This achieves signal power compensation while simplifying circuit structure, reducing board area, and lowering development costs.

[0008] In conjunction with the first aspect, the bypass unit is used to select the signal of the radio frequency path to bypass the amplification unit and be transmitted through the bypass unit when the power of the signal transmitted on the radio frequency path is greater than a first threshold; the bypass unit is also used to allow the signal of the radio frequency path to be transmitted through the amplification unit when the power of the signal transmitted on the radio frequency path is less than or equal to the first threshold.

[0009] In this way, electronic devices can bypass the amplification unit during signal transmission in large signal scenarios through the bypass unit, avoiding distortion of large signals due to excessive amplification, thereby affecting communication quality.

[0010] In conjunction with the first aspect, the switching circuit is connected in parallel between the first end and the second segment of the amplification unit. The first end and the second end serve as the input and output ends of the amplification unit when the amplification unit is used to amplify the signal received by the antenna. The first end and the second end serve as the output and input ends of the amplification unit when the amplification unit is used to amplify the signal transmitted by the radio frequency front-end module.

[0011] In this way, by connecting a switching circuit in parallel with the amplification unit, the signal can be bypassed by the amplification unit when the switching circuit is closed, and the signal can still be processed by the amplification unit when the switching circuit is open, thus realizing the control of whether the amplification unit processes the signal.

[0012] In conjunction with the first aspect, the switching unit further includes a control terminal, which is used to receive a first control signal when the power of the signal transmitted on the radio frequency path is greater than a first threshold, the first control signal being used to control the switching circuit to close; and the control terminal is used to receive a second control signal when the power of the signal transmitted on the radio frequency path is less than or equal to the first threshold, the second control signal being used to control the switching circuit to open.

[0013] In this way, electronic devices can control the opening or closing of the switching circuit based on the signal strength, so that in the case of large signals, the signal transmission can skip the amplification unit and avoid the distortion of large signals due to excessive amplification, thereby affecting the communication quality.

[0014] In conjunction with the first aspect, the electronic device also includes a power detector for detecting the power of the signal on the radio frequency path.

[0015] In this way, electronic devices can detect the power of the signal on the radio frequency path through a power detector, and control the bypass unit based on the detected signal power, so as to avoid amplifying large signals, causing excessive amplification and distortion, and thus affecting communication quality.

[0016] In conjunction with the first aspect, the electronic device further includes a processor, which is configured to send the first control signal or the second control signal to the control terminal of the switching circuit based on the detection result of the power detector; wherein, if the detection result indicates that the power of the signal transmitted on the radio frequency path is greater than a first threshold, the processor sends the first control signal to the control terminal; and if the detection result indicates that the power of the signal transmitted on the radio frequency path is less than or equal to the first threshold, the processor sends the second control signal to the control terminal.

[0017] In this way, the electronic device can control the closing or opening of the switching circuit through the first control signal and the second control signal, and whether the control signal is processed by the amplification unit to realize the switching of the working state of the electronic device, so that the electronic device can process the signal in an appropriate manner and protect the communication quality of the electronic device.

[0018] In conjunction with the first aspect, the distance between the amplification unit and the antenna in the radio frequency path is less than or equal to the distance between the amplification unit and the radio frequency front-end module in the radio frequency path.

[0019] Placing the amplification unit close to the antenna allows the electronic device to perform additional signal processing on the antenna side, compensating for path loss caused by the RF traces and ensuring the communication quality of the electronic device.

[0020] In conjunction with the first aspect, the power of the signal transmitted on the radio frequency path is specifically the signal power at the first position on the radio frequency path; on the radio frequency path, the first position is closer to the antenna than the radio frequency front-end module.

[0021] In conjunction with the first aspect, when the switch unit is in the closed state, the first threshold is a first value; when the switch unit is in the open state, the first threshold is a second value; the first value is less than or equal to the second value.

[0022] In this way, a certain hysteresis range can be set between the threshold values ​​for switching the working state of electronic devices. This results in a certain delay in the switching between the state of amplifying signals and the state of not amplifying signals. This avoids the signal strength detected by the electronic device from fluctuating around the threshold value due to the influence of detection accuracy when the actual signal strength is near the threshold value. This prevents the electronic device from frequently switching working modes, which would affect the signal processing.

[0023] In conjunction with the first aspect, the measurement window duration of the power detector is close to half of the subcarrier spacing of the signal transmitted on the radio frequency path, where "close" means that the time interval does not exceed the first duration.

[0024] In this way, by setting a specific measurement window duration for the power detector, the electronic device can promptly identify large, transient signals and allow them to bypass the amplification unit, thus preventing damage to the unit due to processing large signals. Simultaneously, a shorter measurement window duration allows the electronic device to detect signal power more frequently. Once the large, transient signal disappears, the electronic device can quickly switch back to normal operation and perform proper signal amplification. Furthermore, due to the relationship between the measurement window duration and the subcarrier interval, the number of signals not properly processed during this period is small, having no actual impact on communication quality and ensuring a superior user experience.

[0025] In conjunction with the first aspect, the electronic device further includes a first matching network and a second matching network. In the radio frequency path, the first matching network is connected in series between the amplification unit and the radio frequency front-end module, and the second matching network is connected in series between the amplification unit and the antenna. When the amplification unit is used to amplify the signal received by the antenna, the first matching network serves as the output matching network of the amplification unit, and the second matching network serves as the input matching network of the amplification unit. When the amplification unit is used to amplify the signal transmitted by the radio frequency front-end module, the first matching network serves as the input matching network of the amplification unit, and the second matching network serves as the output matching network of the amplification unit.

[0026] In this way, electronic devices can reuse the same pair of matching networks in both transmitting and receiving states, reducing the number of components in the circuit, thereby simplifying the circuit structure, reducing the board area, and reducing development costs.

[0027] Secondly, this application provides a chip including an amplification unit, a bypass unit, a power detector, a first pin, a second pin, a third pin, and a fourth pin; the first pin is used to connect to the radio frequency signal transceiver port of an external radio frequency front-end module, and the second pin is used to connect to an antenna; the radio frequency path between the first pin and the second pin serves as both a transmission path for radio frequency signals from the first pin and a reception path for radio frequency signals from the second pin; the amplification unit is connected to the radio frequency path; the amplification unit is used to amplify the power of the signal received at the first pin before transmitting it to the second pin, and to amplify the power of the signal received at the second pin before transmitting it to the antenna. The first pin is used by the bypass unit to select whether the signal transmitted in the RF path bypasses the amplification unit and is transmitted through the bypass unit. The third pin is used to connect the external processor and the bypass unit to receive a control signal sent by the external processor. The control signal is used to control the bypass unit to select whether the signal in the RF path passes through the amplification unit. The power detector is used to detect the power of the signal transmitted in the RF path. The fourth pin is used to connect the external processor and the power detector to send the power detection result to the external processor. The external processor is used to control the bypass unit to select whether the signal transmitted in the RF path bypasses the amplification unit based on the power detection result.

[0028] In conjunction with the second aspect, the bypass unit is used to select whether the signal transmitted in the radio frequency path bypasses the amplification unit and is transmitted through the bypass unit. Specifically, it includes: when the power of the signal transmitted by the bypass unit in the radio frequency path is greater than a first threshold, selecting the signal of the radio frequency path to bypass the amplification unit and be transmitted through the bypass unit; when the power of the signal transmitted by the bypass unit in the radio frequency path is less than or equal to the first threshold, allowing the signal of the radio frequency path to be transmitted through the amplification unit.

[0029] In conjunction with the second aspect, the bypass unit includes a switching circuit connected in parallel with the amplification unit; the switching circuit also includes a control terminal connected to the third pin; when the control terminal receives a first control signal from the external processor through the third pin, it controls the switching circuit to close; when the control terminal receives a second control signal from the external processor through the third pin, it controls the switching circuit to open.

[0030] In conjunction with the second aspect, when the power detector detects that the power of the signal on the radio frequency path is greater than the first threshold, the power detector sends a first feedback signal to the fourth pin; when the power detector detects that the power of the signal on the radio frequency path is less than the first threshold, the power detector sends a second feedback signal to the fourth pin.

[0031] In conjunction with the second aspect, the power of the signal on the radio frequency path is specifically the power of the signal at the second pin.

[0032] Thirdly, this application provides a radio frequency (RF) transceiver method applied to an electronic device, the electronic device including: an RF front-end module, an amplification unit, and an antenna, wherein the RF front-end module and the antenna share a single RF path, the RF path including the amplification unit connected between the RF front-end module and the antenna, the method including: when transmitting a signal through the RF front-end module, amplifying the transmitted signal through the amplification unit; when receiving a signal through the antenna, amplifying the received signal through the amplification unit; the transmitted signal and the received signal pass through the same RF path via the amplification unit.

[0033] In conjunction with the third aspect, the electronic device further includes a bypass unit and a power detector. The bypass unit includes a switching circuit connected in parallel with the amplification unit. The power detector is connected to the radio frequency path. The method further includes: detecting the transmitted signal power on the radio frequency path using the power detector; controlling the switching circuit to close when the signal power on the radio frequency path is greater than a first threshold; and controlling the switching circuit to open when the signal power on the radio frequency path is less than or equal to a second threshold.

[0034] In conjunction with the third aspect, when the switch unit is in the closed state, the first threshold is a first value; when the switch unit is in the open state, the first threshold is a second value; the first value is less than or equal to the second value.

[0035] In conjunction with the third aspect, the measurement window duration of the power detector is close to half of the subcarrier interval of the signal transmitted on the radio frequency path, where "close" means that the time interval does not exceed the first duration.

[0036] In conjunction with the third aspect, the power detector detects the transmitted signal power on the radio frequency path, specifically including:

[0037] The power detector detects the signal power at a first location on the radio frequency path; on the radio frequency path, the first location is closer to the antenna than the radio frequency front-end module.

[0038] Fourthly, this application provides an electronic device comprising: a processor, a memory, a radio frequency front-end module, an amplification unit, and an antenna;

[0039] The transmit and receive paths between the RF front-end module and the antenna are multiplexed by a single RF path, which includes the amplification unit connected between the RF front-end module and the antenna. The amplification unit is used to amplify the power of the signal received by the antenna and the signal transmitted by the RF front-end module.

[0040] The memory stores a computer program, which the processor executes to implement the method described in the third aspect.

[0041] Fifthly, this application provides a computer-readable storage medium including a computer program that, when run on an electronic device, causes the electronic device to perform the method described in the third aspect.

[0042] In a sixth aspect, this application provides a computer program product that, when run on a computer, causes the electronic device to perform the method described in the third aspect. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the radio frequency remote extension scheme of the electronic device 100 provided in the embodiments of this application;

[0044] Figure 2 This is a schematic diagram of the radio frequency structure of the electronic device 100 provided in the embodiments of this application;

[0045] Figure 3 This is a circuit diagram of an electronic device 100 performing receiving and amplification according to an embodiment of this application;

[0046] Figure 4 This is a circuit diagram of an electronic device 100 performing receiving and transmitting amplification according to an embodiment of this application;

[0047] Figure 5 This is a circuit diagram of a bidirectional amplifier for an electronic device 100 provided in an embodiment of this application;

[0048] Figure 6 This is a schematic diagram of the structure of a bidirectional amplification unit provided in an embodiment of this application;

[0049] Figure 7 This is a schematic diagram of a bidirectional amplifier circuit including a power detector in an electronic device 100 provided in an embodiment of this application;

[0050] Figure 8 This is a schematic diagram of a bidirectional amplifier circuit including a filter array in an electronic device 100 provided in an embodiment of this application;

[0051] Figure 9 This is a schematic diagram of a power detector hysteresis range setting provided in an embodiment of this application. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. The terms “first” and “second” are used for descriptive purposes only and should not be construed as implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of that feature. “First” and “second,” etc., are used to distinguish different objects, not to describe a particular order of objects. For example, a first object and a second object are used to distinguish different objects, not to describe a particular order of objects.

[0054] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0055] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or related scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0056] The term "and / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone.

[0057] In this application embodiment, the electronic device 100 may include, but is not limited to, devices with communication functions such as mobile phones, tablets, and smartwatches. This application embodiment does not limit the specific form or type of the electronic device 100.

[0058] For devices with communication capabilities, radio frequency (RF) modules and antennas are typically used to achieve communication. However, considering factors such as antenna layout and size, antenna signal interference, and device structure, in some cases, the antenna of the electronic device is moved further away. For example... Figure 1 As shown, the electronic device 100 can be a foldable device. The communication module of the electronic device 100 may include a radio frequency (RF) module 101 and an antenna 102. The RF module 101 can be used to process signals, such as filtering and amplifying, and can also manage the receiving and transmitting states of the electronic device 100. The antenna 102 can be used to receive or transmit signals.

[0059] In some embodiments, such as Figure 2 As shown, the electronic device may also include a modem 201, which can be connected to the radio frequency module 101. The radio frequency module 101 may include a radio frequency integrated circuit (RFIC) 202 and a radio frequency front-end circuit 203. The radio frequency front-end circuit can also be called a radio frequency front-end module.

[0060] The modem 201 is used for signal modulation and demodulation, thereby enabling data transmission and reception. When the electronic device 100 is in transmitting mode, the modem 201 converts digital signals into analog signals, which can then be transmitted via radio waves using the antenna 102. When the electronic device 100 is in receiving mode, the modem 201 restores the analog signals received by the antenna 102 to digital signals, enabling the electronic device 100 to correctly identify and use the received data.

[0061] An RFIC (Radio Frequency Integrated Circuit) is an integrated circuit used to process radio frequency signals. It inherits the functions of both radio frequency and analog circuits and can also be used for transmitting and receiving wireless signals. When electronic device 100 receives signals, it receives radio electromagnetic wave signals from a base station through antenna 102. The RFIC amplifies, filters, and down-converts these weak radio frequency signals, converting them into low-frequency signals suitable for subsequent processing. When electronic device 100 transmits signals, it sends the digital signals to be transmitted to the RFIC. The RFIC up-converts, amplifies, and filters the signals, ultimately transmitting them as radio waves through antenna 102.

[0062] The modem 201 and the radio frequency integrated circuit 202 can also be used to switch the transmit and receive states in the control electronics 100.

[0063] The radio frequency (RF) front-end circuit 203 can be used to perform additional signal processing to optimize signal transmission and reception performance. For example, the RF front-end circuit 203 can be an L-PAMiD (Low Noise Amplifier-Power Amplifier Module integrated Duplexer), a highly integrated RF front-end module that integrates components such as power amplifiers, low-noise amplifiers, filters, and duplexers. It supports multi-band and multi-mode communication, meeting the requirements of various communication standards. It can be used to optimize the signal processing efficiency of the electronic device 100, extending the battery life of the electronic device 100.

[0064] That is, the electronic device 100 can process signals through the radio frequency module 101 and transmit and receive signals through the antenna 102. For example, when the electronic device 100 is in the receiving state, it can receive external signals through the antenna 102. The signals are transmitted to the radio frequency module 101 through the radio frequency line. After the radio frequency module 101 processes the signals, they are handed over to the electronic device 100 for processing.

[0065] During signal reception, after being received by antenna 102, the signal needs to travel through RF traces to reach RF module 101 for processing by electronic device 100. Because electronic device 100 employs a remote antenna 102 design, its RF traces are longer than conventional RF traces. When the signal travels along a longer RF trace, path loss increases with trace length. Optionally, in some examples, the signal transmitted through the RF trace may also be lost due to passing through the metal hinge of electronic device 100. These additional losses affect the signal reception capability of electronic device 100. Normally, after receiving a weak signal, electronic device 100 can still correctly identify and use the data in the signal after processing by RF module 101. However, if a longer RF trace results in greater path loss, the weak signal may become difficult for electronic device 100 to process after this loss. This reduces the receiving sensitivity of electronic device 100, i.e., the weakest signal level that electronic device 100 can receive.

[0066] For example, when the trace distance between antenna 102 and RF module 101 is greater than 20mm, it can be considered that antenna 102 is in a remote state, and the path loss of RF line will have an additional impact on the received / transmitted signal.

[0067] To address the increased path loss mentioned above, in some embodiments, the electronic device 100 can provide additional enhancement to the received signal. For example... Figure 3As shown, a receiving amplification unit can be added between the antenna 102 and the RF front-end circuit 203 of the electronic device 100. This receiving amplification unit may include a bypass unit 301 and a low-noise amplifier (LNA) 302. The LNA is connected between the RF front-end circuit 203 and the antenna 102. The bypass unit 301 is connected in parallel across the LNA and is connected to the modem 201, the RFIC, and the RF front-end circuit 203.

[0068] An LNA (Low Noise Amplifier) ​​is a unit used to amplify weak signals and minimize noise interference. It primarily amplifies the very weak signals received from antenna 102, making them easier for subsequent circuits to process. During amplification, the LNA strives to minimize noise, thus maintaining signal clarity. An LNA typically includes an LNA core and a matching network. The LNA core is usually composed of transistors, which can amplify the signal through multi-stage amplification circuits. Furthermore, by optimizing the transistor's operating state and bias conditions, the amplifier's own noise can be reduced, minimizing the noise figure during signal amplification. The matching network, typically composed of inductors, capacitors, and other components, is located at the LNA's input and output terminals. It optimizes impedance matching and power transfer, improving signal reception and transmission efficiency.

[0069] The bypass unit 301 can, under certain circumstances, allow the signal received by the antenna 102 to bypass the LNA and be directly processed by subsequent circuitry to achieve the switching function of the LNA. This is because, in high-signal scenarios, if the signal received by the antenna 102 is already strong, further amplification by the LNA may cause signal saturation due to the high gain of the LNA, leading to signal distortion. Therefore, the electronic device 100 can use the bypass unit 301 to reduce unnecessary amplification when the received signal is strong, avoiding the introduction of additional noise and distortion.

[0070] In this way, the problem of reduced receiving sensitivity caused by radio frequency distance can be solved by the receiving amplification unit. However, the amplification function of the LNA can only be applied in receiving mode. During the signal transmission process of electronic device 100, after the signal is processed by radio frequency module 101, it is transmitted to antenna 102 through radio frequency lines for transmission. The transmitted signal will also be weakened by path loss. This will also reduce the transmission power of electronic device 100.

[0071] Therefore, in some embodiments, in addition to the LNA, the electronic device 100 may also add a power amplifier 401 (PA) between the RF front-end circuit 203 and the antenna 102. The PA can amplify the power of the input signal. The electronic device 100 can use the PA to amplify the transmitted signal, thereby compensating for path loss and maintaining the expected strength of the transmitted signal. The power amplifier 401 may include a PA core and a matching network. The PA core is composed of transistors and may also include bias circuitry and a DC power supply. The PA core can be used to amplify the power of the RF signal to a sufficient level for radiation through the antenna 102. The matching network is used for impedance matching and power transmission optimization, reducing signal loss during transmission and improving transmission efficiency.

[0072] like Figure 4 As shown, between the RF front-end circuit 203 and the antenna 102, except... Figure 3 The electronic device 100, shown with LNA and bypass unit 301, can also include an additional PA and a switching unit 402. The electronic device 100 can switch between transmit and receive states via the switching unit 402. When the electronic device 100 is in receive state, the switching unit 402 activates the LNA's circuit. After receiving a weak signal through antenna 102, the electronic device 100 can amplify the signal with low noise through the LNA to maintain signal strength before further processing. When the electronic device 100 is in transmit state, the switching unit activates the PA's circuit. The electronic device 100 outputs the processed signal, which is then amplified by power to compensate for path loss before being transmitted through antenna 102.

[0073] This approach reduces sensitivity loss caused by 100% pre-amplifier losses in electronic devices, improves receiver sensitivity, and also solves the problem of reduced output power due to antenna relocation. However, solving the transmission problem comes at the cost of adding an RF trace, a switch, and a power amplifier (PA), which significantly increases the board area and layout costs.

[0074] To address the impact of path loss on receive and transmit power over long lines at a lower cost, this application provides an electronic device 100, which may have a radio frequency transceiver structure.

[0075] like Figure 5 As shown, the radio frequency transceiver structure may include a modem 201, a radio frequency integrated circuit 202, a radio frequency front-end circuit 203, an antenna 102, and an amplification unit 501.

[0076] The amplification unit 501 may include a bidirectional amplifier 502 and a bypass unit 301. The bidirectional amplifier 502 is connected between the RF front-end circuit 203 and the antenna 102. The bypass unit 301 is connected in parallel with the bidirectional amplifier 502. With this structure, the electronic device 100 can achieve bidirectional enhancement of both transmitted and received signals through the amplification unit 501 without adding new RF traces, thus compensating for path loss caused by extending the antenna 102. This protects the communication quality of the electronic device 100 while maintaining board area and controlling cost.

[0077] For the specific circuit structure of amplifier unit 501, please refer to Figure 6 .like Figure 6 As shown, the amplification unit 501 may include a PA core 601, an LNA core 602, a matching network 1, a matching network 2, and a bypass unit 301.

[0078] In this configuration, one side of matching network 1 is connected to the aforementioned RF front-end circuit 203, and the other side is connected to the input side of PA core 601. The output side of PA core 601 is connected to one side of matching network 2, and the other side of matching network 2 is connected to antenna 102. In contrast to PA core 601, the input side of LNA core 602 is connected to matching network 2, and the output side is connected to matching network 1.

[0079] Matching networks can be used to optimize impedance matching, which can significantly improve power transmission efficiency, improve signal quality, and protect components such as power amplifiers and low-noise amplifiers.

[0080] PA core 601 can be used to perform the power amplification function in the PA, and LNA core 602 can be used to perform the low-noise amplification function in the LNA. PA core 601 and LNA core 602 can share matching network 1 and matching network 2. Compared to the above... Figure 4 The complete PA and complete LNA shown each carry a matching network, while Figure 5 The structure shown allows the PA core 601 and LNA core 602 to share a single matching network, reducing the number of components, optimizing the board layout area, and saving costs.

[0081] It should be understood that, Figure 6 The line connected to PA core 601 is represented by a solid line, and the line connected to LNA core 602 is represented by a dashed line. The dashed line is not connected to PA core 601. PA core 601 and LNA core 602 are each connected to matching network 1 and matching network 2 through different lines.

[0082] One end of the bypass unit 301 is connected between the matching network 1 and the RF front-end circuit 203, and the other end is connected between the matching network 2 and the antenna 102. When the bypass unit 301 is turned on, the signal can flow directly between the RF front-end circuit 203 and the antenna 102, bypassing the intermediate amplification unit 501. The bypass unit 301 also includes a control terminal connected to the modem 201. The electronic device 100 can control the switching of the bypass unit 301 by sending control signals through the modem 201. For example, the bypass unit 301 is turned on when it receives a high-level signal and turned off when it receives a low-level signal.

[0083] The working principle of the amplification unit 501 is described below. Please refer to the following for further information. Figure 5 .

[0084] In some embodiments, the PA core 601 and LNA core 602 may be connected to the modem 201 respectively. The modem 201 can be used to control the power-on and power-off of the PA core 601 and LNA core 602. In this way, the electronic device 100 can control the switching of its receive and transmit modes through the modem 201.

[0085] For example, electronic device 100 communicates using time-division duplex mode. When electronic device 100 switches to transmit mode, it controls the power-on of PA core 601 and the power-off of LNA core 602. Electronic device 100 can transmit signals through line 603, and the signals are amplified by PA core 601 and then transmitted by antenna 102. When electronic device 100 switches to receive mode to receive weak signals, it controls the power-on of LNA core 602 and the power-off of PA core 601. Electronic device 100 transmits the received signals through line 604, and the weak signals are amplified with low noise by LNA core 602 before further processing.

[0086] Optionally, both lines 603 and 604 can be differential circuits. Differential circuits can amplify differential-mode signals and suppress common-mode signals, significantly improving the anti-interference capability and stability of signal transmission. They have advantages such as strong anti-interference capability, high signal amplitude, good linearity, and high signal-to-noise ratio.

[0087] Alternatively, lines 603 and 604 can also be single paths. The specific form of lines 603 and 604 is not limited in the embodiments of this application.

[0088] In high-signal scenarios, when the electronic device 100 detects that the received signal strength is greater than the threshold, it can control the bypass unit 301 to be turned on, so that the received signal skips the LNA core 602 and avoids distortion due to excessive amplification.

[0089] In some embodiments, the electronic device 100 can detect signal strength via an RFIC. After receiving a signal through the antenna 102, the electronic device 100 processes the signal through the RF front-end circuit before transmitting it to the RFIC. The RFIC can detect the signal strength. If the RFIC detects that the signal strength does not require low-noise amplification, it can output a control signal to the bypass unit 301 to control the bypass unit 301 to turn on. However, in the method of detecting large signals by the RFIC, the signal will first undergo some processing by the RF front-end circuit before being transmitted to the RFIC. Thus, after processing, the signal may undergo signal conversion, gain, etc., which may lead to errors in the strength detection of the original signal. Furthermore, the RFIC can only perform detection after the RF front-end circuit has processed the signal, which may lead to detection lag, resulting in the bypass unit 301 not turning on in a timely manner. This may cause many large signals to be distorted due to over-amplification, affecting the communication quality of the electronic device 100.

[0090] To detect signal strength more accurately and promptly, the electronic device 100 may also include a power detector 701 (PD) in the amplification unit 501. For example... Figure 7 As shown, one end of the PD can be connected to the modem 201, and the other end can be connected between the amplifier unit 501 and the RF front-end circuit 203. The PD can be used to detect the signal strength in the path and feed back the detection result to the modem 201. The modem 201 can control the bypass unit 301 based on the detection result of the PD.

[0091] The following is a detailed introduction. Figure 7 The operating logic of the circuit shown is illustrated in the table below:

[0092]

[0093]

[0094] For reference Figure 7 , Figure 7The dashed line represents the amplification unit 501 provided in this embodiment, which can be integrated into a chip. The connection points between the amplification unit 501 and other components in the circuit can be described as multiple nodes, including points A, B, C, and P. Point A can be used to connect the bypass unit 301 and the modem 201, allowing the modem 201 to send control signals to control the conduction of the bypass unit 301. Point B can be used to connect the PD and the modem 201. Point C can be used to connect the amplification unit 501 and the RF front-end circuit 203 for transmitting RF signals. Point P can be used to connect the amplification unit 501 and the antenna 102, and can also be used to transmit RF signals. The PD can feed back the detection result to the modem 201 through point B. Point P can also be considered a reference point for the PD to detect the signal strength; that is, the signal strength detected by the PD is the signal strength at point P.

[0095] It should be understood that the PD can adaptively convert the detected signal strength. Taking the receiving state as an example, when the signal at point P detected by the PD has been amplified by the LNA core, the PD can calculate the actual signal strength at point P based on the received signal strength. For example, the PD can divide the detected signal strength by the amplification factor of the LNA core 602. If the signal at point P detected by the PD is transmitted through the bypass unit, then the signal strength is basically equivalent to the signal strength at point P.

[0096] When the electronic device 100 is in receiving mode, it can control the PA core 601 to power down and the LNA core 602 to power on via the modem 201. The electronic device 100 can process signals via the LNA core 602, or periodically detect the signal strength on the path via the PD.

[0097] In a low-signal scenario, the electronic device 100 receives a weak signal through the antenna 102. After being processed by the amplification unit 501, the signal arrives at the radio frequency front-end circuit 203 for further processing. During this process, the control signal transmitted by the modem 201 through point A is at a low level (0), and the bypass unit 301 can be in an off state.

[0098] For example, as shown in the table above, when the signal strength received by the electronic device is less than or equal to -20dBm, the signal output by the PD to the modem 201 through point B is low level (0). This indicates that the signal received by the electronic device 100 at this time is a small signal and needs to be amplified for low noise. The modem 201 will also keep the control signal output at point A low level (0), and the bypass unit 301 will be in the off state.

[0099] When the signal strength exceeds a certain threshold in a large signal scenario, the PD will send this information back to the modem 201. For example, as shown in column B of the table, when the signal strength exceeds -15dBm, it means that the signal no longer needs to be amplified. Then the PD can send a high-level signal (1) to the modem 201 through point B. After receiving the high-level signal, the modem 201 can send a high-level (1) control signal to the bypass unit 301 through point A. The high-level control signal can be used to trigger the bypass unit 301 to turn on, so that the signals subsequently received by the electronic device 100 bypass the LNA core 602 and avoid distortion caused by excessive amplification.

[0100] When electronic device 100 is in transmitting mode, it can control the LNA core 602 to power down and the PA core 601 to power on via modem 201. Electronic device 100 can process signals via PA core 601 and periodically detect signal strength on the path via PD.

[0101] For example, as shown in the table above, when the electronic device 100 switches to the transmit state, the modem 201 can first send a high-level (1) control signal to the bypass unit 301 through point A by default, so that the bypass unit 301 is turned on, and the transmitted signal bypasses the PA core 601 and is not amplified. This is because the signal transmitted by the electronic device 100 generally has a large power, and the path loss generally does not affect the communication quality. By default setting the bypass unit 301 to be turned on in the transmit state, the working time of the PA can be reduced, and the power consumption of the electronic device 100 can be reduced. Then, the electronic device 100 can monitor its own transmit power. If the transmit power is only slightly affected and can be ignored, the PD can output a high-level (1) feedback signal through point B to keep the bypass unit 301 turned on. If the transmit power is detected to be significantly reduced, affecting the communication quality, the PD can output a low-level (0) feedback signal through point B to trigger the modem 201 to control the bypass unit 301 to be turned off, so that the transmitted signal is amplified by the PA core 601 to compensate for the path loss and maintain the communication quality of the electronic device 100.

[0102] In the above description of the operating logic, the PD is used to periodically detect signal strength and trigger the switching of the operating mode of the RF front-end transceiver module. Regarding the receiving state of electronic device 100, since the electronic device 100 has already received signals for a certain period of time during the signal detection process, if the detection process is too long or the switching is not timely, the received signal may not be processed correctly. Therefore, the setting of the PD's signal detection measurement window is also crucial.

[0103] In some embodiments, the electronic device 100 may be subject to interference from transient large signals during communication. If the received large signal is amplified with low noise, it may damage related devices. Therefore, the electronic device 100 may set the measurement window of the PD to no more than half a subcarrier spacing (SCS).

[0104] For example, if electronic device 100 communicates via a subcarrier at a frequency of 60 kHz, since the SCS at 60 kHz is 17.8 μs, the measurement window duration for the PD can be set to 8 μs. If electronic device 100 communicates via subcarriers at other frequencies, the upper limit of the PD measurement window can be set to half the SCS of the corresponding frequency. Thus, by setting the measurement window below half an SCS, damage to devices in the RF path can be avoided when processing large signals.

[0105] This configuration of the PD's detection window avoids the significant impact of instantaneous large signals on the operation of the electronic device 100. For example, if the electronic device 100 is in receiving mode, receiving and amplifying small signals within the target frequency band, and if it suddenly receives large signal noise outside the target frequency band during a detection cycle, the PD will misjudge the signal strength, activate the bypass unit 301, and switch to bypass mode. Thus, the electronic device 100 will be unable to amplify small signals within the target frequency band. After the instantaneous large signal ends, the PD can quickly determine through subsequent detection that the signal strength is still small. In this way, the electronic device 100 can quickly switch back to the low-noise amplification mode, and because the PD's detection window is short, the loss of symbols within half a SCS generally will not affect the overall communication quality, and the signal distortion will not be perceived by the user.

[0106] It should be understood that when electronic device 100 receives signals within a target frequency band, if the signals within the target frequency band are weak, a sudden increase in large signals within the target frequency band is generally unlikely in a short period. Large signals usually originate from interference outside the target frequency band. For example, if another device is very close to electronic device 100, its emitted large signals may affect electronic device 100. To address large signals outside the target frequency band, electronic device 100 can also employ filters to achieve the purpose of filtering large signals.

[0107] like Figure 8As shown, the electronic device 100 can place a filter array 801 between the RF front-end circuit 203 and the antenna 102. The filter array 801 can isolate large signals outside the target frequency band. In this way, when the electronic device 100 receives small signals within the target frequency band in low-noise amplification mode, it will not be interfered with by large signals, thus ensuring communication quality and saving power consumption of the LNA core 602 in amplifying large signals outside the target frequency band. At the same time, the isolation of large signals can also play a certain role in protecting the circuit devices, preventing the bidirectional amplifier 502 and the RF front-end circuit 203 from being damaged due to processing large signals.

[0108] When the electronic device 100 is in receiving mode, in addition to large signal interference outside the target frequency band, factors that may cause the electronic device 100 to erroneously switch operating modes include PD detection errors. When the electronic device 100 controls operating mode switching by detecting signal strength through the PD, the PD is configured with a signal strength threshold. For example, if the detected signal strength exceeds the threshold, the PD determines it as a large signal. If the detected signal strength is below the threshold, the PD determines it as a small signal. The PD can provide different feedback based on the relationship between the detected signal strength and the threshold, thereby triggering the bypass unit 301 to turn on or off, thus switching the operating mode of the electronic device 100.

[0109] Because the PD may have detection errors, the signal strength detected by the PD may deviate from the actual signal strength. If the actual signal strength is near a threshold, the signal strength detected by the PD may frequently cross the threshold due to the detection error, causing the PD to frequently switch operating modes. This will affect the communication quality of the electronic device 100.

[0110] For example, when electronic device 100 receives a signal in bypass mode, the actual signal strength is -12dBm, and the threshold value of the PD is configured to -15dBm. Since the PD's detection accuracy is ±3dBm, the signal strength range that the PD may detect is -9dBm to -15dBm. If the PD detects a signal strength of -15dBm, electronic device 100 will misjudge the signal strength as weak and require low-noise amplification, thus switching from bypass mode to low-noise amplification mode. This leads to inappropriate signal processing and results in signal distortion. If the actual signal strength is -14dBm, due to the influence of detection accuracy, the result of each detection by the power amplifier may fluctuate frequently around -15dBm, causing electronic device 100 to sometimes use bypass mode and sometimes low-noise amplification mode, resulting in chaotic signal processing.

[0111] To avoid erroneous switching of operating states due to detection accuracy issues, the PD in the electronic device 100 can be configured with a hysteresis range to make the switching of operating modes less responsive. For example, the electronic device 100 can be configured with a hysteresis range of 5dBm for the PD.

[0112] like Figure 9 As shown, in some embodiments, the detection threshold of the PD can be adjusted between -30dBm and 20dBm. For example, still using -15dBm as the threshold, if the electronic device 100 is in bypass mode, it will only switch to low-noise amplification mode when the signal strength detected by the PD is below -20dBm. Conversely, when the electronic device 100 is in low-noise amplification mode, it will only switch to bypass mode when the signal strength detected by the PD is above -15dBm. That is, there is a certain delay when the electronic device 100 switches from one operating mode to another. The 5dBm between -15dBm and -20dBm can be referred to as the hysteresis range set by the electronic device 100.

[0113] Thus, when electronic device 100 is in bypass mode, if the PD detects a signal strength drop to around -15dBm, electronic device 100 will not immediately switch to low-noise amplification mode. Instead, it will wait until the detected signal strength drops to -20dBm before switching. Conversely, when electronic device 100 is in low-noise amplification mode and detects a signal strength increase to -20dBm, it will not quickly switch to bypass mode. Instead, it will wait until the detected signal strength increases to -15dBm before switching from low-noise amplification mode to bypass mode. The difference in the actual thresholds for switching between the two modes prevents the detected signal strength from fluctuating around the threshold. For example, if electronic device 100 is in bypass mode and the actual signal strength fluctuates around -20dBm, even if the PD detects a signal strength below -20dBm due to a detection error and switches to low-noise amplification mode, the signal strength will still be less than -15dBm, making low-noise amplification an appropriate treatment. After switching to low-noise amplification mode, when electronic device 100 wants to switch back to bypass mode, the PD needs to detect a signal higher than -15dBm. In this way, even if the signal strength detected by the PD continues to fluctuate around -20dBm due to the influence of detection accuracy, electronic device 100 will not switch back to bypass mode, thus avoiding the frequent switching of working modes.

[0114] In this way, by setting the hysteresis range to be greater than the PD detection error range, the mode switching of the electronic device 100 can be delayed, avoiding frequent mode switching of the electronic device 100 due to detection errors when the actual signal strength is near the threshold value.

[0115] Based on the electronic device 100 provided in this application embodiment, a radio frequency front-end solution with bidirectional amplification, bypass, and power detection functions can be implemented, which reuses a single radio frequency path for both receiving and transmitting states. By controlling the reasonable switching between transmitting, receiving, and bypass states through power detection, appropriate signal processing is achieved. When the received signal is weak or the transmitted signal is damaged, the signal is amplified to compensate for signal loss. Furthermore, when the received signal is strong, the signal can bypass the amplification module, avoiding excessive amplification and distortion, thus ensuring the call quality of the electronic device 100. Reusing a single radio frequency path also simplifies the circuit structure, reduces board area, and lowers development costs.

[0116] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0117] As used in the above embodiments, depending on the context, the term "when..." can be interpreted as meaning "if...", "after...", "in response to determining...", or "in response to detecting...". Similarly, depending on the context, the phrase "when determining..." or "if (the stated condition or event) is interpreted as meaning "if determining...", "in response to determining...", "when (the stated condition or event) is detected", or "in response to detecting (the stated condition or event)".

[0118] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive), etc.

[0119] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

Claims

1. An electronic device, characterized in that, The electronic device includes: a radio frequency front-end module, an amplification unit, and an antenna; The transmit / receive path between the RF front-end module and the antenna is multiplexed by a single RF path, which includes the amplification unit connected between the RF front-end module and the antenna. The amplification unit is used to amplify the power of the signal received by the antenna and the signal transmitted by the RF front-end module.

2. The electronic device according to claim 1, characterized in that, The bypass unit is used to select the signal in the radio frequency path to bypass the amplification unit and be transmitted through the bypass unit when the power of the signal transmitted on the radio frequency path is greater than a first threshold. The bypass unit is also used to allow the signal in the radio frequency path to be transmitted through the amplification unit when the power of the signal transmitted on the radio frequency path is less than or equal to a first threshold.

3. The electronic device according to claim 2, characterized in that, The bypass unit includes a switching circuit connected in parallel between the first end and the second segment of the amplification unit. The first end and the second end serve as the input and output ends of the amplification unit when the amplification unit is used to amplify the signal received by the antenna. The first end and the second end also serve as the output and input ends of the amplification unit when the amplification unit is used to amplify the signal transmitted by the radio frequency front-end module.

4. The electronic device according to claim 3, characterized in that, The switching unit further includes a control terminal, which is used to receive a first control signal when the power of the signal transmitted on the radio frequency path is greater than a first threshold. The first control signal is used to control the switching circuit to close. The control terminal is used to receive a second control signal when the power of the signal transmitted on the radio frequency path is less than or equal to a first threshold. The second control signal is used to control the switching circuit to disconnect.

5. The electronic device according to any one of claims 1-4, characterized in that, The electronic device also includes a power detector for detecting the power of the signal on the radio frequency path.

6. The electronic device according to claim 5, characterized in that, The electronic device includes a processor, which is configured to send the first control signal or the second control signal to the control terminal of the switching circuit based on the detection result of the power detector. Wherein, if the detection result indicates that the power of the signal transmitted on the radio frequency path is greater than a first threshold, the processor sends the first control signal to the control terminal; If the detection result indicates that the power of the signal transmitted on the radio frequency path is less than or equal to a first threshold, the processor sends the second control signal to the control terminal.

7. The electronic device according to any one of claims 1-6, characterized in that, The distance between the amplification unit and the antenna in the radio frequency path is less than or equal to the distance between the amplification unit and the radio frequency front-end module in the radio frequency path.

8. The electronic device according to any one of claims 1-7, characterized in that, The power of the signal transmitted on the radio frequency path is specifically the signal power at the first position on the radio frequency path; on the radio frequency path, the first position is closer to the antenna than the radio frequency front-end module.

9. The electronic device according to any one of claims 2-8, characterized in that, When the switch unit is in the closed state, the first threshold is a first value; when the switch unit is in the open state, the first threshold is a second value; the first value is less than or equal to the second value.

10. The electronic device according to any one of claims 2-9, characterized in that, The measurement window duration of the power detector is close to half of the subcarrier spacing of the signal transmitted on the radio frequency path, where close means that the time interval does not exceed a first duration.

11. The electronic device according to any one of claims 1-10, characterized in that, The electronic device further includes a first matching network and a second matching network. In the radio frequency path, the first matching network is connected in series between the amplification unit and the radio frequency front-end module, and the second matching network is connected in series between the amplification unit and the antenna. When the amplification unit amplifies the signal received by the antenna, the first matching network serves as the output matching network of the amplification unit, and the second matching network serves as the input matching network of the amplification unit. When the amplification unit amplifies the signal transmitted by the radio frequency front-end module, the first matching network serves as the input matching network of the amplification unit, and the second matching network serves as the output matching network of the amplification unit.

12. A chip, characterized in that, The chip includes an amplification unit, a bypass unit, a power detector, a first pin, a second pin, a third pin, and a fourth pin; The first pin is used to connect to the radio frequency signal transceiver port of an external radio frequency front-end module, and the second pin is used to connect to an external antenna; the radio frequency path between the first pin and the second pin serves as both a transmission path for radio frequency signals from the first pin and a reception path for radio frequency signals from the second pin. The amplification unit is connected to the radio frequency path; the amplification unit is used to amplify the signal received by the first pin and transmit it to the second pin, and amplify the signal received by the second pin and transmit it to the first pin. The bypass unit is used to select whether the signal transmitted through the radio frequency path bypasses the amplification unit and is transmitted through the bypass unit; The third pin is used to connect an external processor and the bypass unit to receive control signals sent by the external processor; the control signals are used to control the bypass unit to select whether the signal on the RF path passes through the amplification unit; The power detector is used to detect the power of the signal transmitted on the radio frequency path; The fourth pin is used to connect an external processor and the power detector to send the power detection result to the external processor. The external processor is used to control the bypass unit to select whether the signal transmitted in the radio frequency path bypasses the amplification unit based on the power detection result.

13. The chip according to claim 12, characterized in that, The bypass unit is used to select whether the signal transmitted through the radio frequency path bypasses the amplification unit and is transmitted through the bypass unit, specifically including: If the power of the signal transmitted on the radio frequency path by the bypass unit is greater than a first threshold, the signal on the radio frequency path is selected to bypass the amplification unit and be transmitted through the bypass unit. When the power of the signal transmitted on the radio frequency path is less than or equal to a first threshold, the bypass unit allows the signal on the radio frequency path to be transmitted through the amplification unit.

14. The chip according to claim 13, characterized in that, The bypass unit includes a switching circuit, which is connected in parallel with the amplification unit; the switching circuit also includes a control terminal, which is connected to the third pin. When the control terminal receives a first control signal from the external processor through the third pin, it controls the switching circuit to close. When the control terminal receives a second control signal from the external processor through the third pin, it controls the switching circuit to disconnect.

15. The chip according to any one of claims 12-14, characterized in that, When the power detector detects that the power of the signal on the radio frequency path is greater than the first threshold, the power detector sends a first feedback signal to the fourth pin; When the power detector detects that the power of the signal on the radio frequency path is less than the first threshold, the power detector sends a second feedback signal to the fourth pin.

16. The chip according to claim 15, characterized in that, The power of the signal on the radio frequency path is specifically the power of the signal at the second pin.

17. A radio frequency transceiver method, characterized in that, The method is applied to an electronic device, the electronic device comprising: a radio frequency (RF) front-end module, an amplification unit, and an antenna, wherein the transmit / receive path between the RF front-end module and the antenna is multiplexed into a single RF path, the RF path including the amplification unit, the amplification unit being connected between the RF front-end module and the antenna, and the method comprising: When transmitting a signal through the radio frequency front-end module, the amplification unit is controlled to amplify the power of the transmitted signal. When receiving a signal through the antenna, the amplification unit is controlled to amplify the power of the received signal; the transmitted signal and the received signal pass through the amplification unit via the radio frequency path.

18. The method according to claim 17, characterized in that, The electronic device further includes a bypass unit and a power detector. The bypass unit includes a switching circuit connected in parallel with the amplification unit. The power detector is connected to the radio frequency path. The method further includes: The power detector is used to detect the signal power transmitted on the radio frequency path; When the signal power on the radio frequency path is greater than the first threshold, the switching circuit is controlled to close. When the signal power on the radio frequency path is less than or equal to the second threshold, the switching circuit is controlled to disconnect.

19. The method according to claim 18, characterized in that, When the switch unit is in the closed state, the first threshold is a first value; when the switch unit is in the open state, the first threshold is a second value; the first value is less than or equal to the second value.

20. The method according to claims 18 and 19, characterized in that, The measurement window duration of the power detector is close to half of the subcarrier spacing of the signal transmitted on the radio frequency path, where close means that the time interval does not exceed a first duration.

21. The method according to any one of claims 18-20, characterized in that, Detecting the signal power transmitted on the radio frequency path using the power detector specifically includes: The power detector detects the signal power at a first location on the radio frequency path; on the radio frequency path, the first location is closer to the antenna than the radio frequency front-end module.

22. An electronic device, characterized in that, The electronic device includes: a processor, a memory and a radio frequency front-end module, an amplification unit and an antenna; The transmit / receive path between the RF front-end module and the antenna is multiplexed into a single RF path, which includes the amplification unit connected between the RF front-end module and the antenna. The amplification unit is used to amplify the power of the signal received by the antenna and the signal transmitted by the RF front-end module. The memory stores a computer program, and the processor executes the computer program to implement the method of any one of claims 17-21.

23. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a computer program that, when run on an electronic device, causes the electronic device to perform the method as described in any one of claims 17-21.

24. A computer program product, characterized in that, When the computer program product is run on a computer, it causes the electronic device to perform the method as described in any one of claims 17-21.

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