Signal detection method and signal detection circuit

Abstract

The invention discloses a signal detection method and a signal detection circuit, and belongs to the technical field of radio frequency, and the method comprises the steps: transmitting a test signal through a test antenna of electronic equipment, generating a test transmission signal, obtaining a feedback signal of the test transmission signal through the test antenna, and carrying out the detection of the test transmission signal according to the feedback signal. The method comprises the following steps: acquiring a passive intermodulation interference signal, then acquiring the power of the interference signal, and determining the test interference level of electronic equipment on a test emission signal according to a comparison result of the power of the interference signal and reference power; if the test interference level is low, the interference degree of the electronic equipment to the signal with the low test interference level is low, and the signal quality is improved and the normal use of the electronic equipment is ensured by transmitting the signal with the low test interference level, so that the user experience is improved.

Description

Technical Field

[0001] The present application belongs to the field of radio frequency technology, and specifically relates to a signal detection method and a signal detection circuit. Background Art

[0002] There is a passive intermodulation (PIM) problem in the signal transmission of electronic devices. It should be noted that passive intermodulation is a signal distortion phenomenon in wireless communication systems, that is, the signal transmitted by the electronic device generates high-frequency nonlinear harmonic interference signals in the nonlinear and passive components of the electronic device, resulting in signal distortion.

[0003] Because electronic devices interfere with signals transmitted by other electronic devices, signal quality is reduced, affecting users' normal use of the electronic devices and resulting in a poor user experience. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a signal detection method and a signal detection circuit, which can solve the problem in the related art that electronic devices interfere with signals transmitted by electronic devices, causing signal quality to deteriorate, affecting users' normal use of electronic devices, and resulting in poor user experience.

[0005] In a first aspect, an embodiment of the present application provides a signal detection method, the method comprising:

[0006] Transmitting the test signal through a test antenna of the electronic device to generate a test transmission signal;

[0007] Acquire a feedback signal of the test transmission signal through the test antenna, wherein the feedback signal is a signal generated by the test transmission signal after the passive intermodulation interference of the electronic device;

[0008] Acquire the interference signal of the passive intermodulation according to the feedback signal;

[0009] The power of the interference signal is obtained, and based on the comparison result of the power of the interference signal with the reference power, the test interference level of the electronic device on the test transmission signal is determined; the test interference level is positively correlated with the degree of interference of the electronic device on the test transmission signal.

[0010] In a second aspect, an embodiment of the present application further provides a signal detection circuit, including: a signal generation module, a transceiver module, a radio frequency transceiver, and a processor;

[0011] The signal generating module is electrically connected to the transceiver module and the RF transceiver respectively, and is used to obtain an initial test signal, perform low-pass filtering on the initial test signal to generate a test signal, and perform high-pass filtering on the initial test signal to generate a filtered test signal;

[0012] The transceiver module is electrically connected to the RF transceiver, and is used to transmit the test signal, generate a test transmission signal, and obtain a feedback signal of the test transmission signal, wherein the feedback signal is a signal generated by the test transmission signal through passive intermodulation interference of the electronic device, and the interference signal of the passive intermodulation is obtained according to the feedback signal;

[0013] The radio frequency transceiver is electrically connected to the processor, and the radio frequency transceiver is used to obtain the power of the interference signal and the power of the filtered test signal;

[0014] The processor is used to determine the test interference level of the electronic device to the test transmission signal based on the comparison result of the power of the interference signal and the power of the filtered test signal; the test interference level is positively correlated with the degree of interference of the electronic device to the test transmission signal.

[0015] In an embodiment of the present application, a test signal is transmitted through a test antenna of an electronic device to generate a test transmission signal, a feedback signal of the test transmission signal is obtained through the test antenna, and then a passive intermodulation interference signal is obtained based on the feedback signal, and then the power of the interference signal is obtained, and based on a comparison result of the power of the interference signal and a reference power, a test interference level of the electronic device to the test transmission signal is determined. Since the test interference level is positively correlated with the degree of interference of the electronic device to the test transmission signal, the degree of interference of the electronic device to the signal with a low test interference level is low. By transmitting a signal with a low test interference level, the signal quality is improved, and the normal use of the electronic device is ensured, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of steps of a signal detection method provided in an embodiment of the present application;

[0017] Figure 2 is a flowchart of the specific steps of a signal detection method provided in an embodiment of the present application;

[0018] Figure 3 is a structural schematic diagram of a signal detection circuit provided in an embodiment of the present application;

[0019] Figure 4 is a specific structural diagram of a signal detection circuit provided in an embodiment of the present application;

[0020] Figure 5 is a schematic diagram of signal transmission and reception of an antenna module provided in an embodiment of the present application;

[0021] Figure 6 is a waveform diagram of the feedback signal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0023] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0024] The signal transmission method provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0025] Figure 1 is a flow chart of the steps of a signal detection method provided in an embodiment of the present application, such as Figure 1 As shown, the method may include:

[0026] Step 101: Transmit a test signal through a test antenna of an electronic device to generate a test transmission signal.

[0027] It should be noted that the electronic device has multiple antennas, each of which supports multiple frequency bands, that is, the frequency range of the signal, and each antenna can transmit and receive signals.

[0028] Specifically, the electronic device may be a smart phone, a tablet computer, an e-book reader, a wearable device (such as a smart watch), an electronic game console, or the like. The embodiments of the present application do not limit the specific types of electronic devices.

[0029] The test signal is a signal generated by the electronic device, the test antenna is one of multiple antennas of the electronic device, and the test frequency band is one of multiple frequency bands supported by the test antenna.

[0030] In the embodiment of the present application, a test signal is transmitted through a test antenna of an electronic device to generate a test transmission signal, and then a feedback signal of the test transmission signal is obtained through the test antenna.

[0031] Step 102: Acquire a feedback signal of the test transmission signal through the test antenna, where the feedback signal is a signal generated by the test transmission signal passing through passive intermodulation interference of the electronic device.

[0032] Specifically, the feedback signal is a signal generated by the test transmission signal after being interfered by nonlinear and passive components in the electronic device.

[0033] It should be noted that the feedback signal includes a test transmission signal and an interference signal.

[0034] In the embodiment of the present application, the interference signal in the feedback signal is obtained by obtaining the feedback signal of the test transmission signal.

[0035] Step 103: Acquire the passive intermodulation interference signal according to the feedback signal.

[0036] Specifically, the interference signal is a high-frequency nonlinear harmonic signal.

[0037] Reference Figure 6 In the coordinate system with frequency U as the horizontal axis and voltage V as the vertical axis, segment X1 in the feedback signal is the waveform portion corresponding to the test transmission signal, and segments X2 and X3 in the feedback signal are both waveform portions corresponding to the interference signal, that is, high-frequency nonlinear harmonics.

[0038] Optionally, in some embodiments, the wave function of the feedback signal is as follows:

[0039] V out =a1V in +a2V in 2 +a3V in 3 +...+a n V in n +...

[0040] Among them, V out is the wave function of the feedback signal, a i is the component V of the i-th wave function in i The coefficient of , i is a positive integer.

[0041] It should be noted that a1V in To test the wave function part corresponding to the emission signal, "a2V in2 +a3V in 3 +...+a n V in n +...” is the wave function part corresponding to the interference signal, that is, the high-frequency nonlinear harmonic.

[0042] In the embodiment of the present application, the power of the interference signal is obtained by obtaining the interference signal in the feedback signal.

[0043] Step 104: Acquire the power of the interference signal, and determine the test interference level of the electronic device to the test transmission signal according to a comparison result between the power of the interference signal and a reference power.

[0044] The test interference level is positively correlated with the interference degree of the electronic device to the test transmission signal.

[0045] It should be noted that the test interference level includes low level and high level. If the test interference level is low, it means that the electronic equipment has less interference with the test transmission signal, the quality of the test transmission signal is better, and signal distortion can be avoided. If the test interference level is high, it means that the electronic equipment has greater interference with the test transmission signal, the quality of the test transmission signal is poor, resulting in signal distortion.

[0046] Specifically, the power of the interference signal is obtained through a radio frequency transceiver in the electronic device.

[0047] In an embodiment of the present application, the power of the interference signal is obtained, and the test interference level of the electronic device to the test transmission signal is determined based on the comparison result of the power of the interference signal and the reference power, and then the signal quality is improved by transmitting a signal with a low test interference level.

[0048] In the related art, the interference degree of the signals transmitted by the electronic devices to the electronic devices is reduced by improving the grounding materials. Specifically, the ordinary grounding method is changed to gold-plated materials or gold-plated sheets, which leads to increased costs.

[0049] In the embodiment of the present application, a test signal is transmitted through a test antenna of an electronic device to generate a test transmission signal, a feedback signal of the test transmission signal is obtained through the test antenna, and then a passive intermodulation interference signal is obtained based on the feedback signal, and then the power of the interference signal is obtained, and based on a comparison result of the power of the interference signal and a reference power, a test interference level of the electronic device to the test transmission signal is determined. Since the test interference level is positively correlated with the degree of interference of the electronic device to the test transmission signal, the degree of interference of the electronic device to the signal with a low test interference level is low. By transmitting a signal with a low test interference level, the signal quality is improved, and compared with the related art in which the cost of the electronic device increases due to improving the grounding material, costs are saved.

[0050] In an embodiment of the present application, a test signal is transmitted through a test antenna of an electronic device to generate a test transmission signal, a feedback signal of the test transmission signal is obtained through the test antenna, and then a passive intermodulation interference signal is obtained based on the feedback signal, and then the power of the interference signal is obtained, and based on a comparison result of the power of the interference signal and a reference power, a test interference level of the electronic device to the test transmission signal is determined. Since the test interference level is positively correlated with the degree of interference of the electronic device to the test transmission signal, the degree of interference of the electronic device to the signal with a low test interference level is low. By transmitting a signal with a low test interference level, the signal quality is improved, and the normal use of the electronic device is ensured, thereby improving the user experience.

[0051] Figure 2 is a flowchart of the specific steps of a signal detection method provided in an embodiment of the present application, such as Figure 2 As shown, the method may include:

[0052] Step 201: Transmit a test signal through a test antenna of an electronic device to generate a test transmission signal.

[0053] The implementation of this step is similar to the implementation process in the above step 101, and will not be repeated here.

[0054] Step 202: Acquire a feedback signal of the test transmission signal through the test antenna, where the feedback signal is a signal generated by the test transmission signal passing through passive intermodulation interference of the electronic device.

[0055] The implementation of this step is similar to the implementation process in the above step 102, and will not be repeated here.

[0056] Step 203: high-pass filter the feedback signal to generate a filtered feedback signal.

[0057] In the embodiment of the present application, the feedback signal is subjected to high-pass filtering to generate a filtered feedback signal, and the filtered feedback signal is then determined to be an interference signal.

[0058] Step 204: Determine the filtered feedback signal as the interference signal.

[0059] In the embodiment of the present application, the filtered feedback signal is determined as an interference signal, and then the power of the interference signal is obtained.

[0060] Step 205: Acquire the power of the interference signal, and determine the test interference level of the electronic device to the test transmission signal according to a comparison result between the power of the interference signal and a reference power.

[0061] The test interference level is positively correlated with the interference degree of the electronic device to the test transmission signal.

[0062] The implementation of this step is similar to the implementation process in the above step 104, and will not be repeated here.

[0063] Optionally, in some embodiments, determining the test interference level of the electronic device to the test signal according to the comparison result of the power of the interference signal and the reference power includes the following sub-steps:

[0064] Sub-step 2051: When the power of the interference signal is less than the reference power, determine that the test interference level is a low level.

[0065] In the embodiment of the present application, when the power of the interference signal is less than the reference power, the test interference level is determined to be a low level, thereby establishing a second corresponding relationship between the test antenna, the test frequency band and the test interference level.

[0066] Sub-step 2052: When the power of the interference signal is greater than or equal to the reference power, determine that the test interference level is a high level.

[0067] In an embodiment of the present application, when the power of the interference signal is greater than or equal to the reference power, the test interference level is determined to be a high level, thereby establishing a second corresponding relationship between the test antenna, the test frequency band and the test interference level.

[0068] By executing sub-steps 2051 to 2052, it is possible to determine the test interference level of the electronic device to the test transmission signal according to the comparison result of the power of the interference signal and the reference power.

[0069] Optionally, in some embodiments, step 201 includes the following sub-steps:

[0070] Sub-step 2011: transmitting the test signal through the test antenna according to the test frequency band and transmission power to generate the test transmission signal.

[0071] In an embodiment of the present application, a test signal is transmitted through a test antenna according to a test frequency band and a transmission power to generate a test transmission signal, and then after obtaining a test power adjustment amount, a first correspondence between the test antenna, the test frequency band and the test power adjustment amount is established.

[0072] After sub-step 2052, the method further includes the following steps:

[0073] Step 206: Reduce the current test transmit power for the nth time according to the preset reduction amount each time, and obtain the transmit power after the nth reduction; n is a positive integer.

[0074] For example, the preset reduction amount may be 1 dB.

[0075] In an embodiment of the present application, the current test transmit power is reduced for the nth time by a preset reduction amount each time to obtain the transmit power after the nth reduction, and then the test signal is transmitted through the test antenna according to the test frequency band and the transmit power after the nth reduction to generate a new test transmit signal.

[0076] Optionally, in some embodiments, when n is 1, the current test transmit power is the transmit power.

[0077] In an embodiment of the present application, the transmit power is reduced for the first time by a preset reduction amount each time to obtain the transmit power after the first reduction, and then the test signal is transmitted through the test antenna according to the test frequency band and the transmit power after the first reduction to generate a new test transmit signal.

[0078] Step 207: transmitting the test signal through the test antenna according to the test frequency band and the transmission power reduced for the nth time to generate a new test transmission signal;

[0079] In the embodiment of the present application, a new test transmission signal is generated by transmitting the test signal through a test antenna according to the test frequency band and the transmission power reduced for the nth time, and then a new feedback signal of the new test transmission signal is obtained.

[0080] Step 208: Acquire a new feedback signal of the new test transmission signal, where the new feedback signal is a signal generated by the new test transmission signal after passing through the passive intermodulation interference of the electronic device.

[0081] In the embodiment of the present application, a new feedback signal of a new test transmission signal is obtained, thereby obtaining a new interference signal in the new feedback signal, and obtaining the power of the new interference signal.

[0082] Step 209: Obtain a new interference signal of passive intermodulation in the new feedback signal, and obtain the power of the new interference signal.

[0083] Specifically, the new feedback signal is high-pass filtered to obtain a new interference signal.

[0084] In an embodiment of the present application, by obtaining a new interference signal in a new feedback signal and obtaining the power of the new interference signal, and then when the power of the new interference signal is less than a reference power, the preset reduction amount is multiplied by n to obtain a test power adjustment amount, and a first correspondence between the test antenna, the test frequency band and the test power adjustment amount is established.

[0085] Step 210: When the power of the new interference signal is less than the reference power, multiply the preset reduction amount by n to obtain a test power adjustment amount, and establish a first corresponding relationship between the test antenna, the test frequency band and the test power adjustment amount.

[0086] In an embodiment of the present application, when the power of the new interference signal is less than the reference power, the preset reduction amount is multiplied by n to obtain a test power adjustment amount, and a first correspondence between the test antenna, the test frequency band and the test power adjustment amount is established, so as to obtain the power adjustment amount corresponding to the transmitting antenna and the transmitting frequency band from the first correspondence between the test antenna, the test frequency band and the test power adjustment amount.

[0087] By executing steps 206 to 210, it can be achieved that, when the power of the new interference signal is less than the reference power, a first corresponding relationship between the test antenna, the test frequency band and the test power adjustment amount is established.

[0088] Optionally, in some embodiments, when n is 1, the current test transmit power is the transmit power; after acquiring the power of the new interference signal, the method further includes the following steps:

[0089] Step 211: When the power of the new interference signal is greater than or equal to the reference power, enter the step of reducing the current test transmit power for the nth time by a preset reduction amount each time to obtain the transmit power after the nth reduction.

[0090] In an embodiment of the present application, when the power of the new interference signal is greater than or equal to the reference power, the step of reducing the current test transmit power for the nth time by a preset reduction amount each time to obtain the transmit power after the nth reduction is entered, until the power of the current new interference signal is less than the reference power, so as to multiply the preset reduction amount by n to obtain the test power adjustment amount, and establish a first correspondence between the test antenna, the test frequency band and the test power adjustment amount.

[0091] An example is given for steps 214 to 219. For example, the transmit power is reduced for the first time according to the preset reduction amount each time, and the transmit power after the first reduction is obtained. The test signal is then transmitted through the test antenna according to the test frequency band and the transmit power after the first reduction to generate a new test transmit signal corresponding to the first reduction, and then a new feedback signal of the new test transmit signal corresponding to the first reduction is obtained, and then a new interference signal in the new feedback signal corresponding to the first reduction is obtained, and the power of the new interference signal corresponding to the first reduction is obtained. When the power of the new interference signal corresponding to the first reduction is greater than or equal to the reference power, the transmit power after the first reduction is increased according to the preset reduction amount each time. Reduce the preset reduction amount for the second reduction to obtain the transmission power after the second reduction, then transmit the test signal through the test antenna according to the test frequency band and the transmission power after the second reduction to generate a new test transmission signal corresponding to the second reduction, then obtain a new feedback signal of the new test transmission signal corresponding to the second reduction, then obtain a new interference signal in the new feedback signal corresponding to the second reduction, and obtain the power of the new interference signal corresponding to the second reduction. When the power of the new interference signal corresponding to the second reduction is less than the reference power, multiply the preset reduction amount by 2 to obtain the test power adjustment amount, and establish a first correspondence between the test antenna, the test frequency band and the test power adjustment amount.

[0092] Optionally, in some embodiments, after determining the test interference level of the electronic device to the test transmission signal according to the comparison result of the power of the interference signal and the reference power, the method further includes the following steps:

[0093] Step 212: Establish a second correspondence between the test antenna, the test frequency band, and the test interference level.

[0094] In the embodiment of the present application, a second correspondence between the test antenna, the test frequency band and the test interference level is established to determine the interference level corresponding to the transmitting antenna and the transmitting frequency band from the second correspondence between the test antenna, the test frequency band and the test interference level.

[0095] Optionally, in some embodiments, the method further comprises the following steps:

[0096] Step 213: Obtain a transmitting antenna and a transmitting frequency band selected by the electronic device for signal transmission.

[0097] It should be noted that one of the multiple antennas of the electronic device is pre-set as a transmitting antenna, and the transmitting frequency band is the frequency band supported by the transmitting antenna; the transmitting power is the power of the antenna for signal transmission, and the transmitting power is positively correlated with the strength of the transmitted signal.

[0098] In the embodiment of the present application, the interference level corresponding to the transmitting antenna and the transmitting frequency band is determined by acquiring the transmitting antenna and the transmitting frequency band and then from the second corresponding relationship between the test antenna, the test frequency band and the test interference level.

[0099] Step 214: Determine the interference level corresponding to the transmitting antenna and the transmitting frequency band from the second corresponding relationship.

[0100] It should be noted that the interference level includes low level and high level. A low interference level indicates that the electronic device interferes less with the transmitted signal, the quality of the transmitted signal is better, and signal distortion can be avoided. A high interference level indicates that the electronic device interferes more with the transmitted signal, the quality of the transmitted signal is poor, resulting in signal distortion.

[0101] Specifically, the second corresponding relationship may be in a table form.

[0102] For example, the second correspondence includes the second correspondence between test antenna A1, test frequency band B1 and test interference level C1, the second correspondence between test antenna A2, test frequency band B2 and test interference level C2, the second correspondence between test antenna A3, test frequency band B3 and test interference level C3, the second correspondence between test antenna A4, test frequency band B3 and test interference level C4, and the second correspondence between test antenna A4, test frequency band B4 and test interference level C5. If the transmitting antenna is the same as the test antenna A3, and the transmitting frequency band is the same as the test frequency band B3, then the interference level corresponding to the transmitting antenna and the transmitting frequency band is the test interference level C3.

[0103] In an embodiment of the present application, the interference level corresponding to the transmitting antenna and the transmitting frequency band, that is, the interference level of the electronic device to the transmitted signal, is determined from the second correspondence between the test antenna, the test frequency band and the test interference level. Then, when the interference level is low, the signal of the electronic device is transmitted through the transmitting antenna according to the transmitting frequency band and the transmitting power. When the interference level is high, the transmitting power is reduced by a power adjustment amount to obtain a new transmitting power. Then, the signal of the electronic device is transmitted through the transmitting antenna according to the transmitting frequency band and the new transmitting power.

[0104] Step 215: When the interference level is low, transmit a signal of the electronic device through the transmitting antenna according to the transmitting frequency band and the transmitting power.

[0105] In the embodiment of the present application, when the interference level is at a low level, it indicates that the degree of interference of the electronic device to the transmitted signal is small. By transmitting the signal of the electronic device through the transmitting antenna according to the transmitting frequency band and the transmitting power, the quality of the transmitted signal can be guaranteed and signal distortion can be avoided.

[0106] Optionally, in some embodiments, after step 214, the method further includes the following steps:

[0107] Step 216: When the interference level is high, reduce the transmission power by a power adjustment amount to obtain a new transmission power, and transmit a signal of the electronic device through the transmitting antenna according to the transmission frequency band and the new transmission power.

[0108] It should be noted that the strength of the transmitted signal is positively correlated with the degree of interference of the electronic device to the transmitted signal, that is, the greater the strength of the transmitted signal, the greater the degree of interference of the electronic device to the transmitted signal. Since the transmission power is positively correlated with the strength of the transmitted signal, the transmission power is reduced, the strength of the new transmitted signal is reduced, and the degree of interference of the electronic device to the new transmitted signal is reduced, thereby improving the quality of the new transmitted signal and avoiding signal distortion. The new transmitted signal is a signal transmitted through the transmitting antenna according to the transmission frequency band and the new transmission power.

[0109] In an embodiment of the present application, when the interference level is high, it means that the electronic device has a large degree of interference with the transmitted signal, and the transmit power is reduced by a power adjustment amount to obtain a new transmit power. The signal of the electronic device is transmitted through the transmitting antenna according to the transmit frequency band and the new transmit power. Since the transmit power is reduced, the degree of interference of the electronic device with the new transmit signal is reduced, and the quality of the signal transmitted through the transmitting antenna according to the transmit frequency band and the new transmit power can be guaranteed, thereby avoiding signal distortion.

[0110] Specifically, in some embodiments, the electronic device is a mobile phone. Since nonlinear and passive components in the mobile phone interfere with the signals transmitted by the mobile phone, the quality of the mobile phone signal is reduced, affecting the user's normal use of the mobile phone. For example, the reduction in the quality of the mobile phone signal leads to poor call quality and network quality of the mobile phone.

[0111] Through the embodiments of the present application, when the interference level is low, the signal of the mobile phone is transmitted through the transmitting antenna according to the transmitting frequency band and the transmitting power. When the interference level is high, it means that the interference degree of the mobile phone to the transmitted signal is large. By reducing the transmitting power by the power adjustment amount, a new transmitting power is obtained, and the signal of the mobile phone is transmitted according to the new transmitting power through the transmitting antenna and the transmitting frequency band. Since the transmitting power is reduced, the interference degree of the mobile phone to the new transmitting signal is reduced, thereby ensuring the normal use of the mobile phone and making the mobile phone have good call quality and network quality.

[0112] Optionally, in some embodiments, the method further comprises the following steps:

[0113] Step 217: Obtain the power adjustment amount corresponding to the transmitting antenna and the transmitting frequency band from the first corresponding relationship among the test antenna, the test frequency band and the test power adjustment amount.

[0114] Specifically, the first corresponding relationship may be in a table form.

[0115] For example, the first corresponding relationship includes the first corresponding relationship between the test antenna A1, the test frequency band B1 and the test power adjustment amount D1, the first corresponding relationship between the test antenna A2, the test frequency band B2 and the test power adjustment amount D2, the first corresponding relationship between the test antenna A3, the test frequency band B3 and the test power adjustment amount D3, the first corresponding relationship between the test antenna A4, the test frequency band B3 and the test power adjustment amount D4, and the first corresponding relationship between the test antenna A4, the test frequency band B4 and the test power adjustment amount D5. If the transmitting antenna and the test antenna A4 are the same, and the transmitting frequency band and the test frequency band B3 are the same, then the power adjustment amount corresponding to the transmitting antenna and the transmitting frequency band is the test power adjustment amount D4.

[0116] In an embodiment of the present application, the power adjustment amount corresponding to the transmitting antenna and the transmitting frequency band is obtained from the first correspondence between the test antenna, the test frequency band and the test power adjustment amount, and then when the interference level is high and the power adjustment amount is less than a preset threshold, the transmitting power is reduced by the power adjustment amount to obtain a new transmitting power, and the electronic device transmits a signal through the transmitting antenna according to the transmitting frequency band and the new transmitting power.

[0117] Step 216 includes the following sub-steps:

[0118] Sub-step 2161: When the interference level is a high level and the power adjustment amount is less than a preset threshold, the transmit power is reduced by the power adjustment amount to obtain the new transmit power, and the electronic device transmits a signal through the transmit antenna according to the transmit frequency band and the new transmit power.

[0119] Specifically, the preset threshold may be 6 dB, where dB is decibel, and dB is a logarithmic unit used to characterize relative changes in power.

[0120] In an embodiment of the present application, in order to avoid the signal strength being too low after the transmission power is reduced and affecting the communication distance, a preset threshold is set. When the interference level is high and the power adjustment amount is less than the preset threshold, the transmission power is reduced by the power adjustment amount to obtain a new transmission power, thereby avoiding the signal strength being too low transmitted through the transmitting antenna according to the transmission frequency band and the new transmission power. Since the transmission power is reduced, the degree of interference of the electronic device to the new transmission signal is reduced, thereby ensuring the normal use of the electronic device and improving the user experience.

[0121] Optionally, in some embodiments, after step 214, the method further includes the following steps:

[0122] Step 218: When the interference level is high and the power adjustment amount is greater than or equal to the preset threshold, obtain the target test antenna corresponding to the transmission frequency band from the second corresponding relationship, and the test interference level corresponding to the target test antenna is low.

[0123] For example, the second corresponding relationship includes a second corresponding relationship between the test antenna A1, the test frequency band B1 and the test interference level C1, a second corresponding relationship between the test antenna A2, the test frequency band B2 and the test interference level C2, a second corresponding relationship between the test antenna A3, the test frequency band B3 and the test interference level C3, a second corresponding relationship between the test antenna A4, the test frequency band B3 and the test interference level C4, and a second corresponding relationship between the test antenna A4, the test frequency band B4 and the test interference level C5;

[0124] The first corresponding relationship includes a first corresponding relationship between the test antenna A1, the test frequency band B1 and the test power adjustment amount D1, a first corresponding relationship between the test antenna A2, the test frequency band B2 and the test power adjustment amount D2, a first corresponding relationship between the test antenna A3, the test frequency band B3 and the test power adjustment amount D3, a first corresponding relationship between the test antenna A4, the test frequency band B3 and the test power adjustment amount D4, and a first corresponding relationship between the test antenna A4, the test frequency band B4 and the test power adjustment amount D5;

[0125] Among them, the test power adjustment amount D1, the test power adjustment amount D2, the test power adjustment amount D3 and the test power adjustment amount D5 are all less than the preset threshold value, and the test power adjustment amount D4 is greater than the preset threshold value;

[0126] The transmitting antenna and the test antenna A4 are the same, and the transmitting frequency band and the test frequency band B3 are the same. The power adjustment amount corresponding to the transmitting antenna and the transmitting frequency band is the test power adjustment amount D4. Since the test power adjustment amount D4 is greater than the preset threshold, the target test frequency band that is the same as the transmitting frequency band is the test frequency band B3. Since the test power adjustment amount D3 corresponding to the test frequency band B3 is less than the preset threshold, the target test antenna corresponding to the target test frequency band is the test antenna A3.

[0127] In an embodiment of the present application, when the interference level is high and the power adjustment amount is greater than or equal to a preset threshold, since the power adjustment amount is greater than or equal to the preset threshold, it means that the strength of the signal transmitted through the transmitting antenna according to the transmission frequency band and the new transmission power is too small, then by obtaining a target test antenna corresponding to the target test frequency band that is the same as the transmission frequency band from the second correspondence between the test antenna, the test frequency band and the test interference level, and since the test interference level corresponding to the target test antenna is low, the signal of the electronic device is transmitted through the target test antenna according to the target test frequency band and the transmission power, so as to ensure that the quality of the signal transmitted by the electronic device is good and avoid signal distortion.

[0128] Step 219: transmit a signal of the electronic device through the target test antenna according to the transmission frequency band and the transmission power.

[0129] In the embodiment of the present application, since the test interference level corresponding to the target test antenna is a low level, the signal of the electronic device is transmitted through the target test antenna according to the transmission frequency band and transmission power, which can ensure that the quality of the signal transmitted by the electronic device is good and avoid signal distortion.

[0130] By executing steps 218 to 219, when the interference level is high and the power adjustment amount is greater than or equal to the preset threshold, the electronic device transmits signals according to the transmission frequency band and transmission power through the target test antenna.

[0131] Optionally, in some embodiments, the method further comprises the following steps:

[0132] Step 220: Obtain an initial test signal.

[0133] Specifically, an initial test signal is obtained through a radio frequency module in the electronic device.

[0134] In the embodiment of the present application, an initial test signal is acquired and then low-pass filtered to generate a test signal.

[0135] Step 221: low-pass filter the initial test signal to generate the test signal.

[0136] In an embodiment of the present application, a test signal is generated by low-pass filtering an initial test signal, and then the test signal is transmitted through a test antenna of an electronic device according to a test frequency band and transmission power to generate a test transmission signal.

[0137] By executing step 220 to step 221 , it is possible to obtain a test signal.

[0138] Optionally, in some embodiments, the method further comprises the following steps:

[0139] Step 222: high-pass filter the initial test signal to generate a filtered test signal.

[0140] In an embodiment of the present application, the initial test signal is high-pass filtered to generate a filtered test signal, and then the power of the filtered test signal is obtained, and the power of the filtered test signal is determined as the reference power.

[0141] Step 223: Acquire the power of the filtered test signal, and determine the power of the filtered test signal as the reference power.

[0142] In an embodiment of the present application, by acquiring the power of the test signal after filtering, and determining the power of the test signal after filtering as the reference power, since the test signal is the signal before interference by the electronic device, the reference power is the power of the high-frequency signal in the test signal, and the feedback signal is the signal after interference by the electronic device, and the interference signal is the high-frequency nonlinear harmonic signal in the feedback signal, by comparing the power of the interference signal in the feedback signal with the reference power, the degree of interference of the electronic device on the test transmission signal emitted by the electronic device can be known, and then the test interference level of the electronic device on the test transmission signal can be determined.

[0143] By executing step 222 to step 223, it is possible to obtain the reference power.

[0144] To summarize, in an embodiment of the present application, a test signal is transmitted through a test antenna of an electronic device to generate a test transmission signal, and then a feedback signal of the test transmission signal is obtained through the test antenna, and then based on the feedback signal, a passive intermodulation interference signal is obtained, and then the power of the interference signal is obtained, and based on a comparison result of the power of the interference signal and a reference power, a test interference level of the electronic device to the test transmission signal is determined. Since the test interference level is positively correlated with the degree of interference of the electronic device to the test transmission signal, the degree of interference of the electronic device to the signal with a low test interference level is low. By transmitting a signal with a low test interference level, the signal quality is improved, and the normal use of the electronic device is ensured, thereby improving the user experience.

[0145] Reference Figure 3The embodiment of the present application also provides a signal detection circuit, including: a signal generation module 10, a transceiver module 20, a radio frequency transceiver 30 and a processor 40; the signal generation module 10 is electrically connected to the transceiver module 20 and the radio frequency transceiver 30 respectively, the signal generation module 10 is used to obtain an initial test signal, and perform low-pass filtering on the initial test signal to generate a test signal, and perform high-pass filtering on the initial test signal to generate a filtered test signal; the transceiver module 20 is electrically connected to the radio frequency transceiver 30, the transceiver module 20 is used to transmit the test signal, generate a test transmission signal, and obtain the test signal through the test antenna. The feedback signal of the test transmission signal is a signal generated by the passive intermodulation interference of the test transmission signal through the electronic device, and the interference signal of the passive intermodulation is obtained according to the feedback signal; the RF transceiver 30 is electrically connected to the processor 40, and the RF transceiver 30 is used to obtain the power of the interference signal and the power of the filtered test signal; the processor 40 is used to determine the test interference level of the electronic device to the test transmission signal according to the comparison result of the power of the interference signal and the power of the filtered test signal; the test interference level is positively correlated with the interference degree of the electronic device to the test transmission signal.

[0146] The processor 40 executes the aforementioned signal transmission method, and the specific implementation process is similar to the implementation process of the aforementioned signal transmission method, which will not be repeated here.

[0147] In an embodiment of the present application, an initial test signal is obtained through a signal generation module 10, and the initial test signal is low-pass filtered to generate a test signal, and the initial test signal is high-pass filtered to generate a filtered test signal, and then the test signal is transmitted through the transceiver module 20 to generate a test transmission signal, and a feedback signal of the test transmission signal is obtained, and according to the feedback signal, a passive intermodulation interference signal is obtained, wherein the feedback signal is a signal generated by the passive intermodulation interference of the test transmission signal through the electronic device, and then the power of the interference signal and the power of the filtered test signal are obtained through the RF transceiver 30, and then the processor 40 determines the test interference level of the electronic device to the test transmission signal based on the comparison result of the power of the interference signal and the power of the filtered test signal, and then by transmitting a signal with a low test interference level, the signal quality is improved to ensure the normal use of the electronic device, thereby improving the user experience.

[0148] Optional, see Figure 4In some embodiments, the signal generating module 10 includes a radio frequency module 11, a low-pass filtering module 12 and a first high-pass filtering module 13; the radio frequency module 11 is electrically connected to the low-pass filtering module 12 and the first high-pass filtering module 13 respectively, and the radio frequency module 11 is used to obtain an initial test signal; the low-pass filtering module 12 is electrically connected to the transceiver module 20, and the low-pass filtering module 12 is used to perform low-pass filtering on the initial test signal to generate a test signal; the first high-pass filtering module 13 is electrically connected to the radio frequency transceiver 30, and the first high-pass filtering module 13 is used to perform high-pass filtering on the initial test signal to generate a filtered test signal.

[0149] It should be noted that the RF module 11 is a signal source of the electronic device; the filtered test signal is transmitted to the RF transceiver 30 through a first feedback receiving (FBRX, Feedback RX, Feedback Receive) path.

[0150] In an embodiment of the present application, an initial test signal is obtained through the RF module 11, and then the initial test signal is low-pass filtered through the low-pass filter module 12 to generate a test signal, and then the initial test signal is high-pass filtered through the first high-pass filter module 13 to generate a filtered test signal, so that the RF transceiver 30 can obtain the power of the filtered test signal.

[0151] Optionally, in some embodiments, the transceiver module 20 includes a combiner 21, an antenna module 22 and a second high-pass filter module 23; the combiner 21 is electrically connected to the signal generating module 10, the antenna module 22 and the second high-pass filter module 23, respectively, and the combiner 21 is used to low-pass filter the test signal to generate a low-pass test signal, and high-pass filter the feedback signal sent by the antenna module 22 to generate a high-pass feedback signal; the antenna module 22 is provided with multiple antennas, and the antenna module 22 is used to use one of the antennas as a test antenna, and transmit the low-pass test signal through the test antenna according to the test frequency band and transmission power to generate a test transmission signal, and obtain a feedback signal of the test transmission signal through the test antenna; the second high-pass filter module 23 is used to high-pass filter the high-pass feedback signal to generate a filtered feedback signal, and determine the filtered feedback signal as the interference signal.

[0152] It should be noted that the interference signal is transmitted to the RF transceiver 30 through the second feedback receiving path.

[0153] Reference Figure 5The low-pass test signal is received by the test antenna in the antenna module 22, and the low-pass test signal is transmitted according to the test frequency band and the test transmission signal transmitted at the transmission power, and the feedback signal is generated through the interference of the nonlinear and passive components formed by the grounded metal surface 50 of the electronic device. The feedback signal is received by the test antenna, wherein the grounded metal surface 50 forms nonlinear and passive components due to its rough surface.

[0154] In an embodiment of the present application, the test signal is low-pass filtered through the combiner 21 to generate a low-pass test signal, and the feedback signal sent by the antenna module 22 is high-pass filtered to generate a high-pass feedback signal. The low-pass test signal is then transmitted through the antenna module 22 through the test antenna among the multiple antennas according to the test frequency band and transmission power to generate a test transmission signal, and a feedback signal of the test transmission signal is obtained. The high-pass feedback signal is then high-pass filtered through the second high-pass filter module 23 to generate a filtered feedback signal, and the filtered feedback signal is determined as an interference signal so that the RF transceiver 30 can obtain the power of the interference signal.

[0155] Through the embodiments of the present application, the nonlinear component caused by unreliable grounding is identified in advance, that is, the PIM risk is identified in advance and processed, so that the interference degree of the electronic device to the new transmission signal is reduced, the normal use of the electronic device is guaranteed, the user experience is improved, and the PIM can be processed without disassembling the device. A corresponding relationship table of the test antenna, test frequency band, test interference level and test power adjustment amount corresponding to the electronic device is established to facilitate the use of different electronic devices; the nonlinear effect of the electronic device is stimulated by the antenna radiation mode, so as to detect the grounding reliability of the electronic device without damaging the electronic device, thereby avoiding the frequency band and antenna combination with poor nonlinearity, and optimizing the user experience of the electronic device by avoiding it in advance.

[0156] To summarize, in an embodiment of the present application, an initial test signal is obtained through a signal generation module 10, and the initial test signal is low-pass filtered to generate a test signal, and the initial test signal is high-pass filtered to generate a filtered test signal, and then the test signal is transmitted through the transceiver module 20 to generate a test transmission signal, and a feedback signal of the test transmission signal is obtained, and according to the feedback signal, a passive intermodulation interference signal is obtained, wherein the feedback signal is a signal generated by the passive intermodulation interference of the test transmission signal through the electronic device, and then the power of the interference signal and the power of the filtered test signal are obtained through the RF transceiver 30, and then the processor 40 determines the test interference level of the electronic device to the test transmission signal according to the comparison result of the power of the interference signal and the power of the filtered test signal, and then by transmitting a signal with a low test interference level, the signal quality is improved, the normal use of the electronic device is ensured, and the user experience is improved.

[0157] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0158] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0159] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A signal detection method, characterized in that: The method comprises: Transmitting the test signal through a test antenna of the electronic device to generate a test transmission signal; Acquire a feedback signal of the test transmission signal through the test antenna, wherein the feedback signal is a signal generated by the test transmission signal after the passive intermodulation interference of the electronic device; Acquire the interference signal of the passive intermodulation according to the feedback signal; The power of the interference signal is obtained, and based on the comparison result of the power of the interference signal with the reference power, the test interference level of the electronic device on the test transmission signal is determined; the test interference level is positively correlated with the degree of interference of the electronic device on the test transmission signal.

2. The method according to claim 1, characterized in that The step of obtaining the passive intermodulation interference signal according to the feedback signal includes: High-pass filtering the feedback signal to generate a filtered feedback signal; The filtered feedback signal is determined as the interference signal.

3. The method according to claim 1, characterized in that The step of determining the test interference level of the electronic device to the test signal according to the comparison result between the power of the interference signal and the reference power includes: When the power of the interference signal is less than the reference power, determining that the test interference level is a low level; When the power of the interference signal is greater than or equal to the reference power, the test interference level is determined to be a high level.

4. The method according to claim 3, characterized in that The step of transmitting the test signal through a test antenna of the electronic device to generate a test transmission signal includes: Transmitting the test signal through the test antenna according to the test frequency band and transmission power to generate the test transmission signal; In the case where the power of the interference signal is greater than or equal to the reference power, after determining that the test interference level is a high level, the method further includes: The current test transmission power is reduced for the nth time according to the preset reduction amount each time, and the transmission power after the nth reduction is obtained; n is a positive integer; Transmitting the test signal through the test antenna according to the test frequency band and the transmission power reduced for the nth time to generate a new test transmission signal; Acquire a new feedback signal of the new test transmission signal, where the new feedback signal is a signal generated by the new test transmission signal after the passive intermodulation interference of the electronic device; Obtaining a new interference signal of passive intermodulation in the new feedback signal, and obtaining the power of the new interference signal; When the power of the new interference signal is less than the reference power, the preset reduction amount is multiplied by n to obtain a test power adjustment amount, and a first corresponding relationship between the test antenna, the test frequency band and the test power adjustment amount is established.

5. The method according to claim 4, characterized in that When n is 1, the current test transmit power is the transmit power; After acquiring the power of the new interference signal, the method further includes: When the power of the new interference signal is greater than or equal to the reference power, the step of reducing the current test transmit power for an nth time according to a preset reduction amount each time to obtain the transmit power after the nth reduction is entered.

6. The method according to claim 1, characterized in that After determining the test interference level of the electronic device to the test transmission signal according to the comparison result of the power of the interference signal and the reference power, the method further includes: A second correspondence between the test antenna, the test frequency band, and the test interference level is established.

7. The method according to claim 6, characterized in that The method further comprises: Acquire a transmitting antenna and a transmitting frequency band selected by the electronic device for signal transmission; Determine, from the second corresponding relationship, an interference level corresponding to the transmitting antenna and the transmitting frequency band; When the interference level is a low level, the electronic device transmits a signal through the transmitting antenna according to the transmitting frequency band and the transmitting power.

8. The method according to claim 7, characterized in that After determining the interference level corresponding to the transmitting antenna and the transmitting frequency band from the second corresponding relationship, the method further includes: When the interference level is high, the transmission power is reduced by a power adjustment amount to obtain a new transmission power, and the electronic device transmits a signal through the transmission antenna according to the transmission frequency band and the new transmission power.

9. The method according to claim 8, characterized in that The method further comprises: Obtaining a power adjustment amount corresponding to the transmitting antenna and the transmitting frequency band from a first correspondence between the test antenna, the test frequency band and the test power adjustment amount; When the interference level is high, the transmission power is reduced by a power adjustment amount to obtain a new transmission power, and the signal of the electronic device is transmitted through the transmission antenna according to the transmission frequency band and the new transmission power, including: When the interference level is a high level and the power adjustment amount is less than a preset threshold, the transmit power is reduced by the power adjustment amount to obtain the new transmit power, and the signal of the electronic device is transmitted through the transmit antenna according to the transmit frequency band and the new transmit power.

10. The method according to claim 9, characterized in that After determining the interference level corresponding to the transmitting antenna and the transmitting frequency band from the second corresponding relationship, the method further includes: When the interference level is high and the power adjustment amount is greater than or equal to the preset threshold, obtaining a target test antenna corresponding to the transmission frequency band from the second corresponding relationship, and the test interference level corresponding to the target test antenna is low; The target test antenna transmits a signal of the electronic device according to the transmission frequency band and the transmission power.

11. A signal detection circuit, characterized in that: include: Signal generation module, transceiver module, radio frequency transceiver and processor; The signal generating module is electrically connected to the transceiver module and the RF transceiver respectively, and is used to obtain an initial test signal, perform low-pass filtering on the initial test signal to generate a test signal, and perform high-pass filtering on the initial test signal to generate a filtered test signal; The transceiver module is electrically connected to the RF transceiver, and is used to transmit the test signal, generate a test transmission signal, and obtain a feedback signal of the test transmission signal, wherein the feedback signal is a signal generated by the test transmission signal through passive intermodulation interference of the electronic device, and the interference signal of the passive intermodulation is obtained according to the feedback signal; The radio frequency transceiver is electrically connected to the processor, and the radio frequency transceiver is used to obtain the power of the interference signal and the power of the filtered test signal; The processor is used to determine the test interference level of the electronic device to the test transmission signal based on the comparison result of the power of the interference signal and the power of the filtered test signal; the test interference level is positively correlated with the degree of interference of the electronic device to the test transmission signal.

12. The signal detection circuit according to claim 11, characterized in that: The signal generation module includes a radio frequency module, a low-pass filter module and a first high-pass filter module; The radio frequency module is electrically connected to the low-pass filter module and the first high-pass filter module respectively, and the radio frequency module is used to obtain an initial test signal; The low-pass filter module is electrically connected to the transceiver module, and the low-pass filter module is used to perform low-pass filtering on the initial test signal to generate a test signal; The first high-pass filtering module is electrically connected to the radio frequency transceiver, and is used for performing high-pass filtering on the initial test signal to generate a filtered test signal.

13. The signal detection circuit according to claim 11, characterized in that: The transceiver module includes a combiner, an antenna module and a second high-pass filter module; The combiner is electrically connected to the signal generating module, the antenna module and the second high-pass filtering module respectively, and the combiner is used to perform low-pass filtering on the test signal to generate a low-pass test signal, and to perform high-pass filtering on the feedback signal sent by the antenna module to generate a high-pass feedback signal; The antenna module is provided with a plurality of antennas, and the antenna module is used to use one of the antennas as a test antenna, and transmit the low-pass test signal through the test antenna according to the test frequency band and the transmission power to generate a test transmission signal, and obtain a feedback signal of the test transmission signal through the test antenna; The second high-pass filtering module is used to perform high-pass filtering on the high-pass feedback signal to generate a filtered feedback signal, and determine the filtered feedback signal as the interference signal.

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