An interference detection circuit and electronic device

Abstract

The application provides an interference detection circuit and an electronic device. A signal receiving end of the interference detection circuit is coupled to an output end of an antenna in the electronic device, and a signal output end of the interference detection circuit is coupled to a processing module in the electronic device. The interference detection circuit is configured to provide an interference detection signal for adjusting a band-pass configuration and / or a local oscillator amplitude to the processing module. The interference detection circuit comprises a power detection module, a signal receiving end of the power detection module being coupled to the output end of the antenna in the electronic device; and a comparison module, a signal receiving end of the comparison module being coupled to an output end of the power detection module, and an output end of the comparison module being coupled to the processing module in the electronic device. In this way, the interference detection circuit is used to detect interference signals in the environment, and the processing module is used to adjust the band-pass configuration and / or the local oscillator amplitude, so as to improve the communication performance of the electronic device in the transit and cluster modes.

Description

Technical Field

[0001] This application relates primarily to the field of communication technology, and in particular to an interference detection circuit and electronic device. Background Technology

[0002] Signal interference is a common and complex problem in the field of communications. It can be divided into internal interference and external interference. Internal interference may be caused by factors such as power supply interference, wireless interference, and lightning, while external interference may come from other wireless devices or signal sources, such as Wi-Fi and Bluetooth operating on the same frequency band.

[0003] In relay or trunking environments, the anti-interference performance at close range remains insufficient. In relay and trunking network environments, the transmit and receive frequencies are typically 10MHz or even closer. In this case, the transmitter frequency will fall within the passband of the receiver's electrically tunable filter, leading to communication problems caused by short-range transmission interference. Utility Model Content

[0004] The main objective of this application is to provide an interference detection circuit and electronic device to solve the problem of mutual interference between short-range communication devices in relay or trunking mode, resulting in poor communication quality, so as to improve communication performance and ensure the needs of short-range communication in relay or trunking mode.

[0005] To address the aforementioned problems, this application provides an interference detection circuit for detecting interference at the receiving front end of an electronic device. The signal receiving end of the interference detection circuit is coupled to the output end of an antenna in the electronic device, and the signal output end of the interference detection circuit is coupled to a processing module in the electronic device. The interference detection circuit is configured to provide the processing module with an interference detection signal for adjusting the bandpass configuration and / or the local oscillator amplitude. The interference detection circuit includes: a power detection module, the signal receiving end of which is coupled to the output end of the antenna in the electronic device; and a comparison module, the signal receiving end of which is coupled to the output end of the power detection module, and the output end of the comparison module is coupled to the processing module in the electronic device.

[0006] To address the aforementioned problems, this application also provides an electronic device, wherein the electronic device includes an interference detection circuit as described in any of the embodiments above.

[0007] This application provides an interference detection circuit and an electronic device. The signal receiving end of the interference detection circuit is coupled to the output end of an antenna in the electronic device, and the signal output end of the interference detection circuit is coupled to a processing module in the electronic device. The interference detection circuit is configured to provide the processing module with an interference detection signal for adjusting the bandpass configuration and / or the local oscillator amplitude. The interference detection circuit includes: a power detection module, the signal receiving end of which is coupled to the output end of the antenna in the electronic device; and a comparison module, the signal receiving end of which is coupled to the output end of the power detection module, and the output end of the comparison module is coupled to the processing module in the electronic device. By coupling the interference detection circuit to the output end of the antenna in the electronic device, interference detection of radio frequency signals can be achieved more quickly. Furthermore, interference detection targeting the radio frequency signal at the output end of the antenna in the electronic device is more accurate, providing the processing module with a more precise interference detection signal. This allows the processing module to more accurately adjust the bandpass configuration and / or the local oscillator amplitude, improving the short-range interference reception communication problem in relay and trunking modes, and enhancing the communication performance of the corresponding electronic device in interference-prone environments. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments 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. Wherein: Figure 1 This is a schematic diagram of the structure of the first embodiment of the interference detection circuit provided in this application; Figure 2 This is a schematic diagram of the structure of the first embodiment of the power detection module provided in this application; Figure 3 This is a schematic diagram of the structure of the second embodiment of the power detection module provided in this application; Figure 4 This is a schematic diagram of the third embodiment of the power detection module provided in this application; Figure 5 This is a schematic diagram of the structure of an embodiment of the comparison module provided in this application; Figure 6 This is a schematic diagram of the structure of the second embodiment of the interference detection circuit provided in this application; Figure 7 This is a schematic diagram of the third embodiment of the interference detection circuit provided in this application; Figure 8 This is a schematic diagram of the structure of the first embodiment of the electronic device provided in this application; Figure 9This is a schematic diagram of the structure of the second embodiment of the electronic device provided in this application; Figure 10 This is a flowchart illustrating the adjustment scheme provided in this application; Figure 11 This is a schematic diagram of an embodiment of conduction blocking enhancement provided in this application; Figure 12 This is a schematic diagram of an embodiment of the anti-interference distance enhancement provided in this application; Figure 13 This is a schematic diagram of the structure of the third embodiment of the electronic device provided in this application.

[0009] Icon labels: 100. Interference detection circuit; 200. Electronic equipment; 210. Antenna; 220. Processing module; 10. Power detection module; 20. Comparison module; 30. Switch control module; 31. First switch control unit; 32. Second switch control unit; 40. Amplification module; 11. Detection unit; 12. First protection unit; 13. First filtering unit; 14. Second protection unit; 21. Comparator; 22. Voltage divider unit; 230. First signal processing module; 231. Second filtering unit ; 232, First Amplification Unit; 233, Third Filtering Unit; 234, Limiter; 240, Second Signal Processing Module; 241, Mixer Unit; 242, Fourth Filtering Unit; 243, Second Amplification Unit; 2411, Mixer; 2412, First Switching Unit; 2413, Power Amplification Unit; 2414, Second Switching Unit; 2415, First Local Oscillator Unit; 2416, Second Local Oscillator Unit; 250, Transceiver Module; 260, Local Oscillator Module; 270, Mixer Module. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0011] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0012] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0013] In relay and trunking networking environments, the transmit and receive frequencies are typically spaced 10MHz or even closer. In this case, the transmitter frequency may fall within the passband of the receiver's electrically tunable filter, causing short-range transmission interference that prevents the receiver from communicating. For example, in relay mode, when the transmit and receive frequencies of network-registered machines are spaced 10MHz or closer, the transmitter interferes with the receiver, preventing short-range communication. In trunking mode, when the transmit and receive frequencies of network-registered machines are spaced 10MHz or closer, the transmitter interferes with the receiver, preventing short-range communication and causing receiver network synchronization failure. This application provides an interference detection circuit and electronic device to solve the above problems.

[0014] See Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the first embodiment of the interference detection circuit provided in this application; wherein, the interference detection circuit 100 is used to detect interference at the receiving front end of an electronic device. The signal receiving end of the interference detection circuit 100 is coupled to the output end of the antenna 210 in the electronic device 200, and the signal output end of the interference detection circuit 100 is coupled to the processing module 220 in the electronic device 200; wherein, the interference detection circuit 100 is configured to provide the processing module 220 with an interference detection signal for adjusting the bandpass configuration and / or the local oscillator amplitude.

[0015] The interference detection circuit 100 is coupled to the output of the antenna 210 in the electronic device 200, which enables faster interference detection of radio frequency signals. The interference detection is performed on the radio frequency signal at the output of the antenna 210 in the electronic device 200, and the accuracy of interference detection is higher. This provides the processing module 220 with a more accurate interference detection signal, so that the processing module 220 can more accurately adjust the bandpass configuration and / or local oscillator amplitude. This improves the problem of short-range interference reception communication in relay and trunk modes, improves the interference signal suppression degree of the device, and improves the mixing linearity and distortion, thereby improving the communication performance of the corresponding electronic device in the interference environment.

[0016] The interference detection circuit 100 includes a power detection module 10 and a comparison module 20. The signal receiving end of the power detection module 10 is coupled to the output end of the antenna 210 in the electronic device 200. The signal receiving end of the comparison module 20 is coupled to the output end of the power detection module 10, and the output end of the comparison module 20 is coupled to the processing module 220 in the electronic device 200.

[0017] A portion of the radio frequency signal is coupled at the front end of the radio frequency signal receiving circuit, and the coupled energy is detected by the power detection module 10. The detected signal is then output to the comparison module 20. The radio frequency signal is judged by comparing it with the reference voltage through the comparison module 20. The level of interference in the environment is judged and a voltage signal is output to the processing module 220. The processing module 220 is then used to adjust the electronic device 200.

[0018] Regarding the specific structural design of the power detection module 10: In one embodiment, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of the first embodiment of the power detection module provided in this application; the power detection module 10 includes: a detection unit 11, the input terminal of the detection unit 11 is coupled to the output terminal of the antenna 210 in the electronic device 200, and the output terminal of the detection unit 11 is coupled to the signal receiving terminal of the comparison module 20.

[0019] In one embodiment, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the second embodiment of the power detection module provided in this application; the power detection module 10 also includes: a first protection unit 12, a first filtering unit 13, and a second protection unit 14.

[0020] The first end of the first protection unit 12 is coupled to the output end of the antenna 210 in the electronic device 200, the second end of the first protection unit 12 is coupled to the input end of the detection unit 11, and the third end of the first protection unit 12 is grounded; the first end of the first filtering unit 13 is coupled to the output end of the detection unit 11, and the second end of the first filtering unit 13 is grounded; the first end of the second protection unit 14 is coupled to the output end of the detection unit 11, and the second end of the second protection unit 14 is grounded.

[0021] In the above embodiments, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the third embodiment of the power detection module provided in this application; the specific configuration of each unit structure includes the following: In one embodiment, the first protection unit 12 includes: a first resistor R1 and a second resistor R2; wherein, the first end of the first resistor R1 is coupled to the output terminal of the antenna 210; the first end of the second resistor R2 is coupled to the second end of the first resistor R1, and the second end of the second resistor R2 is grounded.

[0022] And / or, the first filter unit 13 includes: a first capacitor C1, the first end of the first capacitor C1 being coupled to the output end of the detector unit 11, and the second end of the first capacitor C1 being grounded.

[0023] And / or, the second protection unit 14 includes: a third resistor R3, the first end of the third resistor R3 being coupled to the output terminal of the detector unit 11, and the second end of the third resistor R3 being grounded.

[0024] In one embodiment, such as Figure 4 As shown, the above scheme also includes diode D1, with the anode of diode D1 coupled to the second terminal of the first resistor R1 and the cathode of diode D1 coupled to the first terminal of the first capacitor C1.

[0025] See Figure 5 As shown, Figure 5 This is a schematic diagram of an embodiment of the comparison module provided in this application; the comparison module 20 compares the signal output by the power detection module 10 with the reference voltage, and then outputs the corresponding level signal to the processing module 220, which adjusts the electronic device 200 according to the signal.

[0026] In one embodiment, such as Figure 5 As shown, the comparison module 20 includes: a comparator 21, the positive input terminal of the comparator 21 is coupled to the output terminal of the power detection module 10, the negative input terminal of the comparator 21 is used to receive a reference voltage, and the output terminal of the comparator 21 is coupled to the processing module 220.

[0027] In one embodiment, such as Figure 5As shown, the comparison module 20 also includes: a fourth resistor R4, a second capacitor C2, and a voltage divider unit 22; wherein, the first end of the fourth resistor R4 is coupled to the output terminal of the power detection module 10; the first end of the second capacitor C2 is coupled to the second end of the fourth resistor R4, and the second end of the second capacitor C2 is grounded; the first end of the voltage divider unit 22 is coupled to a voltage source, the second end of the voltage divider unit 22 is coupled to the negative phase input terminal of the comparator 21, and the third end of the voltage divider unit 22 is grounded.

[0028] In one embodiment, such as Figure 5 As shown, the voltage divider unit 22 includes: a fifth resistor R5 and a sixth resistor R6; the first end of the fifth resistor R5 is coupled to a voltage source, and the second end of the fifth resistor R5 is coupled to the negative phase input of the comparator 21; the sixth resistor R6 has its first end coupled to the second end of the fifth resistor R5, and the second end of the sixth resistor R6 is grounded.

[0029] In the above manner, the interference detection circuit 100 couples energy through the detector tube to output a detector voltage, which is compared with a reference voltage, and then outputs a high-level or low-level signal to the processing module 220 to realize the hardware sensing function of environmental interference signals.

[0030] In one embodiment, such as Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of the second embodiment of the interference detection circuit provided in this application; wherein, the interference detection circuit 100 further includes: a switch control module 30 and an amplification module 40; specifically, the switch control module 30 is coupled to the local oscillator module 260, the mixer module 270 and the processing module 220 of the electronic device 200; the amplification module 40 is coupled to the switch control module 30; wherein, the switch control module 30 is used to adjust the local oscillator amplitude of the local oscillator module 260 according to the interference detection signal.

[0031] Regarding the amplification module 40, in some embodiments, it may be a separately added amplification module 40. In other embodiments, it may be a pre-amplification circuit in the transmitter of the multiplexed electronic device 200.

[0032] In one embodiment, such as Figure 7 As shown, Figure 7This is a schematic diagram of the third embodiment of the interference detection circuit provided in this application; wherein, the switch control module 30 includes: a first switch control unit 31 and a second switch control unit 32; specifically, the first end of the first switch control unit 31 is coupled to the local oscillator module 260 of the electronic device 200, the second end of the first switch control unit 31 is coupled to the processing module 220, and the third end of the first switch control unit 31 is coupled to the amplification module 40; the first end of the second switch control unit 32 is coupled to the amplification module 40, the second end of the second switch control unit 32 is coupled to the mixer module 270 of the electronic device 200, and the third end of the second switch control unit 32 is coupled to the processing module 220.

[0033] According to the above method, the first switch control unit 31 and the second switch control unit 32 are controlled by the processing module 220 to adjust the local oscillator amplitude of the local oscillator module 260 according to the interference detection signal.

[0034] Regarding the above solution, this application also provides an embodiment of an electronic device 200, see reference. Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of the first embodiment of the electronic device provided in this application; wherein, the electronic device 200 includes: an antenna 210, a first signal processing module 230, a second signal processing module 240, and a transceiver module 250; specifically, the antenna 210; the first signal processing module 230, the signal receiving end of the first signal processing module 230 is coupled to the output end of the antenna 210; the second signal processing module 240, the first signal receiving end of the second signal processing module 240 is coupled to the output end of the first signal processing module 230, and the second signal receiving end of the second signal processing module 240 is coupled to the processing module 220; the transceiver module 250, the signal receiving end of the transceiver module 250 is coupled to the output end of the second signal processing module 240; the processing module 220, the processing module 220 is coupled to the output end of the transceiver module 250; wherein, the processing module 220 is configured to adjust the bandpass configuration of the first signal processing module 230 and / or the local oscillator amplitude of the second signal processing module 240.

[0035] For the first signal processing module 230 and the second signal processing module 240, such as Figure 9 As shown, Figure 9This is a schematic diagram of the structure of the second embodiment of the electronic device provided in this application; specifically, the first signal processing module 230 includes: a second filtering unit 231, a first amplification unit 232, and a third filtering unit 233; wherein, the input terminal of the second filtering unit 231 is coupled to the output terminal of the antenna 210; the input terminal of the first amplification unit 232 is coupled to the output terminal of the second filtering unit 231; the input terminal of the third filtering unit 233 is coupled to the output terminal of the first amplification unit 232, and the output terminal of the third filtering unit 233 is coupled to the second signal processing module 240; wherein, the second filtering unit 231 and the third filtering unit 233 are also coupled to the processing module 220, and the processing module 220 outputs a control signal to adjust the bandpass configuration of the second filtering unit 231 and the third filtering unit 233.

[0036] like Figure 9 As shown, a limiter 234 is also provided between the second filtering unit 231 and the first amplification unit 232. The first end of the limiter 234 is coupled to the second end of the second filtering unit 231, and the second end of the limiter 234 is grounded. The limiter 234 limits the amplitude of the input signal, compressing the portion of the signal that is higher or lower than a set threshold to a reasonable amplitude.

[0037] Understandably, after the interference detection circuit 100 detects interference in the environment, it transmits the sensing results to the processing module 220 via a signal. The processing module 220 adjusts the signal in real time based on the transmitted sensing results. In one embodiment, the first filtering unit 13 and the second filtering unit 231 are band-pass filters (BPF). By dynamically adjusting the TV configuration of the first filtering unit 13 and the second filtering unit 231 (where TV configuration is the band-pass configuration, the main purpose of which is to select signals in a specific frequency band, ensuring that the receiver only receives the required frequency signals, and reducing interference and noise), the suppression degree of the band-pass filter on the interference frequency points in the passband is improved, thereby improving the impact of interference.

[0038] Among them, such as Figure 9As shown, the second signal processing module 240 includes: a mixer unit 241, a fourth filter unit 242, and a second amplification unit 243; wherein, the first input terminal of the mixer unit 241 is coupled to the output terminal of the first signal processing module 230, and the second input terminal of the mixer unit 241 is coupled to the processing module 220; the input terminal of the fourth filter unit 242 is coupled to the output terminal of the mixer unit 241; the second amplification unit 243 has its input terminal coupled to the output terminal of the fourth filter unit 242, and its output terminal coupled to the transceiver module 250; wherein, the processing module 220 outputs a control signal to adjust the local oscillator amplitude of the mixer unit 241. It can be understood that, in one embodiment, the fourth filter unit 242 is an intermediate frequency filter; and the second amplification unit 243 is an intermediate frequency amplifier.

[0039] It is understood that the mixing unit 241 here corresponds to the mixing module 270 in the electronic device 200 described in the above embodiments.

[0040] Furthermore, it is understood that the above function is achieved by adjusting the local oscillator amplitude in the mixer unit 241 in this application. The specific structure and scheme are as follows: Among them, such as Figure 9 As shown, the mixing unit 241 includes: a mixer 2411, a first switching unit 2412, a power amplifier unit 2413, a second switching unit 2414, and a first local oscillator unit 2415; the first input terminal of the mixer 2411 is coupled to the first signal processing module 230, and the output terminal of the mixer 2411 is coupled to the third filter unit 233; the first switching unit 2412 is coupled to the second input terminal of the mixer 2411; the output terminal of the power amplifier unit 2413 is coupled to the first switching unit 2412; the input terminal of the second switching unit 2414 is coupled to the input terminal of the power amplifier unit 2413; the first local oscillator unit 2415 is coupled to the second input terminal of the mixer 2411 and the second switching unit 2414; wherein, the control units of the first switching unit 2412 and the second switching unit 2414 are coupled to the processing module 220, and the processing module 220 adjusts the local oscillator amplitude of the first local oscillator unit 2415 by controlling the on and off states of the first switching unit 2412 and the second switching unit 2414.

[0041] The second local oscillator unit 2416 is disposed at the transceiver module 250 and coupled to the transceiver module 250 to provide the transceiver module 250 with the corresponding local oscillator signal.

[0042] It is understood that the first local oscillator unit 2415 and the second local oscillator unit 2416 here correspond to the local oscillator module 260 described in the above embodiments.

[0043] In one embodiment, the first switching unit 2412 and the second switching unit 2414 can be single-pole double-throw (SPDT) switches. An SPDT is a type of electronic switch with one input and two outputs, which can be switched from one output port to the other manually or via electrical signal control. Similarly, the first switching control unit 31 and the second switching control unit 32 described in the above embodiments are similar to the first switching unit 2412 and the second switching unit 2414.

[0044] like Figure 9 As shown, the processing module 220 may further include a digital signal processor (MCU) and a microcontroller unit (DSP). The interference detection signal output by the interference detection circuit 100 is transmitted to the digital signal processor (MCU). The digital signal processor detects the environmental interference signal. Based on the detection result of the environmental interference signal, the DSP dynamically adjusts the bandpass TV configuration in real time, thereby improving the suppression of interference frequencies within the passband by the bandpass filter and improving the interference effect from the source.

[0045] Understandably, the processing module 220 controls the first switching unit 2412 and the second switching unit 2414 based on the detection signal output by the interference detection circuit 100, in order to adjust the amplitude of the local oscillator signal. It makes full use of the pre-amplification circuit of the transmitter and controls its application state intermittently. When there is strong interference in the radio frequency signal, the switching unit is switched on, that is, the first switching module and the second switching module are turned on, so that the first local oscillator unit 2415 is amplified by the power amplification unit 2413 to amplify the local oscillator power, thereby improving the nonlinearity of the mixer 2411, improving the distortion problem and enhancing the blocking performance of strong signals.

[0046] In the above scheme, the TV value of the receiver front-end electronically tuned filter is adjusted in real time according to the scenario perception, thereby improving the suppression of interference signals with an out-of-band offset of 10M and fundamentally improving the transmission short-range interference reception communication; and combined with the transmit and receive time slot control, the transmit preamplifier is reused to improve the receive local oscillator power, thereby improving the linearity of the receiver mixer 2411, improving distortion, and improving the transmission short-range interference reception communication.

[0047] In conjunction with the above solutions, this application provides a process scheme for adjusting the bandpass configuration and / or the local oscillator amplitude; for details, please refer to [link to relevant documentation]. Figure 10 As shown, Figure 10This is a schematic diagram of the adjustment scheme provided in this application. When the terminal is powered on and in standby mode, it is configured with the original bandpass TV value and a low-amplitude local oscillator scheme by default. In receiving mode, environmental signal detection is performed. Based on different detection results, the interference detection circuit 100 outputs a level signal to the processing module 220. For example, when there is no strong interference signal in the environment (i.e., the terminal is in an environment with no or minimal interference), the interference detection circuit 100 outputs a low level to the MCU in the processing module 220. The MCU notifies the DSP to adjust the bandpass TV value configuration to maintain the original bandpass and controls the switching of local oscillator amplification to a low-amplitude local oscillator scheme. When there is strong interference signal in the environment, the interference detection circuit 100 outputs a high level to the MCU. The MCU then notifies the DSP to adjust the new TV value configuration and simultaneously controls the first switching unit 2412 and the second switching unit 2414 to switch to the pre-amplification circuit for local oscillator amplification processing. After completing the above adjustments, the circuit continues to perform interference detection. If strong interference is still detected, the new TV value configuration and high-amplitude local oscillator scheme are maintained. If no interference is detected, the circuit switches back to the default TV value and low-amplitude local oscillator scheme.

[0048] Furthermore, such as Figure 11 and Figure 12 As shown, where, Figure 11 This is a schematic diagram of an embodiment of conduction blocking enhancement provided in this application; Figure 12 This is a schematic diagram of an embodiment of the anti-interference distance enhancement provided in this application; from Figure 11 and Figure 12 As can be seen, the above solutions have improved the transmission blockage and anti-interference distance to a certain extent, effectively improving the mutual interference problem between registered machines in relay and cluster modes, improving the inability to make calls at close range, and enhancing the user experience.

[0049] To solve the above problems, such as Figure 13 As shown, Figure 13 This is a schematic diagram of the structure of a third embodiment of the electronic device provided in this application; wherein the electronic device 200 includes an interference detection circuit 100 as described in any of the embodiments above.

[0050] This application provides an interference detection circuit and an electronic device. The signal receiving end of the interference detection circuit is coupled to the output end of an antenna in the electronic device, and the signal output end of the interference detection circuit is coupled to a processing module in the electronic device. The interference detection circuit is configured to provide an interference detection signal to the processing module for adjusting the bandpass configuration and / or the local oscillator amplitude. The interference detection circuit includes: a power detection module, the signal receiving end of which is coupled to the output end of the antenna in the electronic device; and a comparison module, the signal receiving end of which is coupled to the output end of the power detection module, and the output end of the comparison module is coupled to the processing module in the electronic device.

[0051] The above method utilizes an interference detection circuit to detect interference signals in the environment and outputs an interference detection signal to the processing module based on the detection results. The processing module then controls and adjusts the bandpass configuration and / or local oscillator amplitude in the electronic device. This enables intelligent adjustment of the RF receiving loop's receiving state while ensuring long-distance communication for the terminal, resolving mutual interference between network-connected devices in relay and trunking modes, improving short-range communication quality, and enhancing communication performance.

[0052] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An interference detection circuit, characterized in that, The interference detection circuit is used to detect interference at the receiving front end of an electronic device. The signal receiving end of the interference detection circuit is coupled to the output end of the antenna of the electronic device, and the signal output end of the interference detection circuit is coupled to the processing module in the electronic device. The interference detection circuit is configured to provide the processing module with an interference detection signal for adjusting the bandpass configuration and / or the local oscillator amplitude. The interference detection circuit includes: A power detection module, wherein the signal receiving end of the power detection module is coupled to the output end of the antenna in the electronic device; A comparison module, wherein the signal receiving end of the comparison module is coupled to the output end of the power detection module, and the output end of the comparison module is coupled to the processing module in the electronic device.

2. The interference detection circuit according to claim 1, characterized in that, The power detection module includes: The detector unit has its input terminal coupled to the output terminal of the antenna in the electronic device, and its output terminal coupled to the signal receiving terminal of the comparison module.

3. The interference detection circuit according to claim 2, characterized in that, The power detection module also includes: The first protection unit has a first end coupled to the output end of the antenna in the electronic device, a second end coupled to the input end of the detection unit, and a third end grounded. A first filtering unit, wherein a first end of the first filtering unit is coupled to the output end of the detector unit, and a second end of the first filtering unit is grounded; The second protection unit has a first end coupled to the output end of the detector unit and a second end grounded.

4. The interference detection circuit according to claim 3, characterized in that, The first protection unit includes: A first resistor, the first end of which is coupled to the output terminal of the antenna, and the second end of which is coupled to the output terminal of the detector unit; The second resistor has a first end coupled to the second end of the first resistor, and the second end of the second resistor is grounded. And / or, the first filtering unit includes: A first capacitor, the first terminal of which is coupled to the output terminal of the detector unit, and the second terminal of which is grounded; And / or, the second protection unit includes: The third resistor has its first end coupled to the output terminal of the detector unit and its second end grounded.

5. The interference detection circuit according to claim 1, characterized in that, The comparison module includes: The comparator has its positive input terminal coupled to the output terminal of the power detection module, its negative input terminal used to receive a reference voltage, and its output terminal coupled to the processing module.

6. The interference detection circuit according to claim 5, characterized in that, The comparison module further includes: The fourth resistor, the first end of which is coupled to the output terminal of the power detection module; The second capacitor has a first terminal coupled to the second terminal of the fourth resistor, and the second terminal of the second capacitor is grounded. A voltage divider unit has a first terminal coupled to a voltage source, a second terminal coupled to the negative phase input terminal of the comparator, and a third terminal grounded.

7. The interference detection circuit according to claim 6, characterized in that, The voltage divider unit includes: The fifth resistor has its first end coupled to the voltage source and its second end coupled to the negative input terminal of the comparator. The sixth resistor has a first end coupled to the second end of the fifth resistor, and the second end of the sixth resistor is grounded.

8. The interference detection circuit according to claim 1, characterized in that, The interference detection circuit further includes: A switch control module, which is coupled to the local oscillator module of the electronic device, the mixer module of the electronic device, and the processing module; An amplification module, wherein the amplification module is coupled to the switch control module; The switch control module is used to adjust the local oscillator amplitude of the local oscillator module according to the interference detection signal.

9. The interference detection circuit according to claim 8, characterized in that, The switch control module includes: A first switch control unit, a first terminal of which is coupled to the local oscillator module of the electronic device, a second terminal of which is coupled to the processing module, and a third terminal of which is coupled to the amplification module; The second switch control unit has a first terminal coupled to the amplification module, a second terminal coupled to the mixer module of the electronic device, and a third terminal coupled to the processing module.

10. An electronic device, characterized in that, The electronic device includes an interference detection circuit as described in any one of claims 1-9.

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