Signal processing method and device, electronic equipment and chip

Abstract

The invention relates to a signal processing method and device, electronic equipment and a chip, a first differential signal on a transmission line can be adjusted according to the frequency of a radio frequency signal to obtain a second differential signal, and the radio frequency signal is a signal generating interference on the first differential signal; the second differential signal is transmitted to a differential signal receiving end, and in each path of the differential signal received by the differential signal receiving end, the phase difference of an interference signal generated by the radio frequency signal is smaller than or equal to a first set value.

Description

Technical Field

[0001] The present disclosure relates to the field of signal processing technology, and in particular to a signal processing method, device, electronic device and chip. Background Art

[0002] The development of mobile terminals has led to the application of higher-pixel cameras. After taking photos or recording videos, the camera module on the terminal transmits the image data to the CPU (Central Processing Unit) through the high-speed MIPI (Mobile Industry Processor Interface) differential signal line, and the CPU transmits the image taken by the camera to the screen display control module for image display. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a signal processing method, device, electronic device and chip.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a signal processing method, including:

[0005] Adjusting the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal, wherein the radio frequency signal is a signal that interferes with the first differential signal;

[0006] The second differential signal is transmitted to the differential signal receiving end, and in each channel of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the first set value.

[0007] Optionally, the transmission route includes a transmitting end or a signal transmission line of the first differential signal.

[0008] Optionally, adjusting the first differential signal on the transmission path according to the frequency of the radio frequency signal includes: determining a signal adjustment parameter according to the frequency of the radio frequency signal; and adjusting the first differential signal according to the signal adjustment parameter.

[0009] Optionally, the first differential signal includes at least two signals, and the signal adjustment parameters include signal adjustment parameters corresponding to at least one of the signals.

[0010] Optionally, the signal adjustment parameter includes a signal delay, the first differential signal includes n signals, the signal delay includes signal delays corresponding to n or n-1 signals respectively, wherein n is greater than or equal to 2; and adjusting the first differential signal by using the signal adjustment parameter includes:

[0011] For an n-1 signal among the n first differential signals, the phase of the signal is adjusted according to the signal delay corresponding to the signal.

[0012] Optionally, determining a signal adjustment parameter according to the frequency of the radio frequency signal includes:

[0013] According to the frequency of the radio frequency signal, the signal adjustment parameter corresponding to each signal in the n-1 signals is searched from a preset corresponding relationship.

[0014] Optionally, the signal adjustment parameter is pre-calibrated in the following manner:

[0015] Control the RF module to transmit RF signals according to a preset RF frequency;

[0016] Transmitting an interference signal to the differential signal receiving end through the transmission route, wherein the interference signal is generated by the radio frequency signal transmitted by the radio frequency system;

[0017] The signal adjustment parameter corresponding to the preset radio frequency frequency is determined according to the phase difference and / or amplitude difference of the interference signal at the differential signal receiving end.

[0018] Optionally, the interference signal includes at least two paths, and determining the signal adjustment parameter corresponding to the preset radio frequency according to the phase difference and / or amplitude difference of the interference signal at the differential signal receiving end includes:

[0019] Determine any one of at least two interference signals as a reference signal;

[0020] For each signal other than the reference signal in at least two interference signals, a signal adjustment parameter corresponding to the signal at the preset RF frequency is determined according to a phase difference and / or amplitude difference between the signal at the differential signal receiving end and the reference signal.

[0021] Optionally, the method further comprises:

[0022] When the signal delay is greater than or equal to the signal delay threshold required by the eye diagram of the current differential signal transmission rate, reduce the differential signal transmission rate; or,

[0023] When the signal delay is greater than or equal to the signal delay threshold required by the eye diagram of the current differential signal transmission rate, the first differential signal is adjusted according to the signal delay threshold.

[0024] Optionally, in each channel of the differential signal received by the differential signal receiving end, the amplitude difference of the interference signal generated by the radio frequency signal is less than or equal to a second set value.

[0025] Optionally, the signal adjustment parameter includes a signal amplitude gain, and adjusting the first differential signal by using the signal adjustment parameter includes:

[0026] For at least one signal in the first differential signal, the amplitude of the signal is adjusted according to the signal amplitude gain corresponding to the signal.

[0027] Optionally, adjusting the amplitude of the signal according to the signal amplitude gain corresponding to the signal includes:

[0028] The amplitude of the signal is adjusted through the receiving equalizer RxEQ according to the signal amplitude gain corresponding to the signal.

[0029] Optionally, the interference signal is an interference signal whose amplitude is reduced to a target amplitude by a common mode filter CMF, and the target amplitude is a signal amplitude pre-set according to a signal amplitude safety threshold value corresponding to a processing unit of the terminal.

[0030] Optionally, the transmission rate of the first differential signal is determined according to a delay characteristic of the CMF.

[0031] Optionally, the greater the delay difference caused by the CMF on the signal, the lower the transmission rate of the first differential signal.

[0032] Optionally, the transmission rate of the first differential signal is adjusted in real time according to the degree to which the frequency of the radio frequency signal interfering with the first differential signal is affected by the CMF delay and the frequency of the radio frequency signal currently being transmitted in the radio frequency system.

[0033] According to a second aspect of an embodiment of the present disclosure, there is provided a signal processing device, including:

[0034] A signal adjustment module, configured to adjust the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal, wherein the radio frequency signal is a signal that interferes with the first differential signal;

[0035] The signal transmission module is configured to transmit the second differential signal to the differential signal receiving end, and the phase difference of the interference signal generated by the radio frequency signal in each signal of the differential signal received by the differential signal receiving end is less than or equal to the target setting value.

[0036] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, including: a differential signal sending module, a processing unit, and a radio frequency module;

[0037] Wherein, a signal transmission line is connected between the differential signal sending module and the processing unit, and the differential signal sending module transmits the differential signal to the processing unit through the signal transmission line;

[0038] The radio frequency signal transmitted by the radio frequency module interferes with the differential signal transmitted on the signal transmission line through near-field coupling;

[0039] The differential signal sending module is configured to adjust the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal; the second differential signal is transmitted to the differential signal receiving end on the processing unit, and in each signal of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the first set value.

[0040] Optionally, the transmission route includes a transmitting end of the first differential signal or the signal transmission line.

[0041] Optionally, the differential signal sending module includes a camera module and / or a screen.

[0042] Optionally, the signal transmission line includes a mobile industry processor interface MIPI signal line.

[0043] Optionally, the differential signal sending module is configured to determine a signal adjustment parameter according to the frequency of the radio frequency signal; and adjust the first differential signal according to the signal adjustment parameter.

[0044] Optionally, the first differential signal includes at least two signals, and the signal adjustment parameters include signal adjustment parameters corresponding to at least one of the signals.

[0045] Optionally, the signal adjustment parameter is pre-calibrated in the following manner:

[0046] The radio frequency module transmits a radio frequency signal according to a preset radio frequency frequency;

[0047] Transmitting an interference signal to the differential signal receiving end through the transmission route, wherein the interference signal is generated by the radio frequency signal transmitted by the radio frequency module;

[0048] The signal adjustment parameter corresponding to the preset radio frequency frequency is determined according to the phase difference and / or amplitude difference of the interference signal at the differential signal receiving end.

[0049] Optionally, the signal adjustment parameter includes signal delay and / or signal amplitude gain.

[0050] Optionally, in each channel of the differential signal received by the differential signal receiving end, the amplitude difference of the interference signal generated by the radio frequency signal is less than or equal to a second set value.

[0051] Optionally, the electronic device also includes a common mode filter CMF, which is connected to the signal transmission line; the second differential signal is transmitted to the processing unit through the CMF; the interference signal is an interference signal after the amplitude is reduced to a target amplitude through the CMF, and the target amplitude is a signal amplitude pre-set according to a signal amplitude safety threshold value corresponding to the processing unit.

[0052] Optionally, the transmission rate of the first differential signal is determined according to a delay characteristic of the CMF.

[0053] According to a fourth aspect of an embodiment of the present disclosure, there is provided a signal processing device, including:

[0054] processor;

[0055] a memory for storing processor-executable instructions;

[0056] Wherein, the processor is configured to:

[0057] Adjusting the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal, wherein the radio frequency signal is a signal that interferes with the first differential signal;

[0058] The second differential signal is transmitted to the differential signal receiving end, and in each channel of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the first set value.

[0059] According to a fifth aspect of an embodiment of the present disclosure, a chip is provided, including a processor and an interface; the processor is used to read instructions to execute the method described in the first aspect of the present disclosure.

[0060] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: based on the frequency of the radio frequency signal that interferes with the first differential signal, the first differential signal on the transmission path can be adjusted to obtain a second differential signal; after the second differential signal is transmitted to the differential signal receiving end, in each signal of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the target setting value, so that after the differential signal receiving end obtains the difference through each differential signal, the interference signal therein is subtracted to a greater extent, thereby reducing the radio frequency interference effect of the radio frequency signal on the digital differential signal, realizing the anti-radio frequency interference of the digital differential signal, and at the same time enabling the differential signal receiving end to normally decode the received digital differential signal, thereby improving the anti-radio frequency interference performance of the high-speed differential signal on the terminal without increasing the hardware cost or sacrificing performance.

[0061] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0063] Figure 1 The figure is a schematic diagram of a mobile terminal with a camera function according to an exemplary embodiment.

[0064] Figure 2 The figure is a flowchart of a signal processing method according to an exemplary embodiment.

[0065] Figure 3 is based on Figure 2 The illustrated embodiment shows a flow chart of a signal processing method.

[0066] Figure 4a and Figure 4b The figure is a schematic diagram showing a signal adjustment effect according to an exemplary embodiment.

[0067] Figure 5a is with Figure 4a The corresponding eye diagram effect diagram, Figure 5b is with Figure 4b Schematic diagram of the corresponding eye diagram effect.

[0068] Figure 6 The present invention is a flow chart of a method for calibrating a signal adjustment parameter according to an exemplary embodiment.

[0069] Figure 7 It is a schematic diagram of a simulation model for digital differential signal anti-radio frequency interference according to an exemplary embodiment.

[0070] Figure 8 The figure is a block diagram of a signal processing device according to an exemplary embodiment.

[0071] Fig. 9 is based on Figure 8 The illustrated embodiment shows a block diagram of a signal processing device.

[0072] Fig.10 The present invention is a structural block diagram of an electronic device according to an exemplary embodiment.

[0073] Fig.11 is based on Fig.10 The illustrated embodiment shows a structural block diagram of an electronic device.

[0074] Fig.12It is a block diagram of a device for signal processing according to an exemplary embodiment. DETAILED DESCRIPTION

[0075] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0076] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0077] The present disclosure is mainly applied to the anti-interference scenario of digital differential signals (such as MIPI signals) on the terminal. Taking a mobile terminal with a camera function as an example, the data transmission between the CPU chip and the camera module on the mobile terminal adopts a MIPI signal with a higher transmission rate or a MIPI C-PHY interface technology with a higher transmission efficiency.

[0078] Figure 1 is a schematic diagram of a mobile terminal with a camera function according to an exemplary embodiment. Figure 1 As shown, the camera module 101 on the terminal is responsible for taking photos, recording videos, etc., and transmits the image data to the CPU central processor 102 through the signal transmission line 108 of the high-speed MIPI signal, and transmits the image data collected by the camera to the memory 104 for further processing. The CPU 102 will further transmit the image data to the screen display control module 103, and the display control module 103 caches and processes and transmits the image data to the screen 110 for display.

[0079] In the process of using the camera to take pictures or record videos, it is possible that the RF system simultaneously transmits the RF signal wirelessly through the mobile phone antenna 107. CPU102 sends the data to be transmitted to the wireless modem 105 and up-converts it to the RF frequency band, and then amplifies or matches the signal to the antenna for transmission through the RF front-end module 106. The high-power RF signal of the antenna may be coupled to the MIPI signal line of the camera (i.e., the signal transmission line for transmitting the MIPI signal) through the near-field coupling 109, thereby interfering with the normal image data transmission of the camera. The near-field coupling path may, for example, include a module sensor module, a camera FPC (Flexible Printed Circuit), a BTB (Board-to-Board) connector, and the like. When the RF energy is superimposed on the high-speed differential signal, the high-speed differential signal will be distorted and cannot be decoded normally. In particular, the introduction of MIPI C-PHY technology makes the camera MIPI communication interface more susceptible to interference from the mobile phone RF wireless RF signal, resulting in camera screen distortion, freezing, and jamming, which seriously affects the user experience.

[0080] That is to say, due to the structural distance limitation in the mobile terminal, the camera high-speed MIPI differential signal is easily interfered by the RF signal transmitted by the RF system, resulting in decoding failure. The following methods are used in related technologies to solve this problem:

[0081] 1. When the camera is working, the antenna transmission power value is greatly reduced, or even the RF antenna path of the corresponding interference frequency band is completely closed, but this will affect the download throughput and antenna signal quality of the end user.

[0082] 2. Increase the distance between the camera and the antenna, but this will severely limit the product layout and make the product lose its stacking competitiveness.

[0083] 3. Add conductive materials on the critical path. However, due to structural reliability and layout limitations, in most cases, mass-producible shielding measures can only relatively reduce the degree of interference to the camera, but cannot completely solve the problem.

[0084] 4. Add a common-mode filtering circuit, but the unique delay and insertion loss imbalance of common-mode filtering devices will limit their effectiveness to a specific frequency band.

[0085] Considering that the period of interference signals generated by RF signals is generally at the microsecond (us) or millisecond (ms) level, while the interfered camera MIPI signals are at the nanosecond (ns) level, it is impossible to use time-sharing in software to avoid coexistence interference problems. In addition, the interference signals generated by RF signals are superimposed on MIPI signals, and the CPU receiving end cannot distinguish between useful signals and useless interference signals, resulting in the inability to completely improve the coexistence interference problem by reducing the MIPI rate.

[0086] In general, the solutions in the related art are to solve or reduce the probability of occurrence of the radio frequency interference problem on the digital differential signal by sacrificing performance or increasing hardware costs, and the universal applicability of the solutions is poor.

[0087] In order to solve the technical problems existing in the related art, the present disclosure provides a signal processing method, device, electronic device and chip. The specific implementation of the present disclosure is described in detail below with reference to the accompanying drawings.

[0088] Figure 2 is a flow chart of a signal processing method according to an exemplary embodiment, which can be applied to a terminal, and is specifically applied to a scenario in which a high-speed digital differential signal (such as a MIPI signal) on the terminal is prevented from being interfered with by a radio frequency signal transmitted by a radio frequency system, such as Figure 2 As shown, the method comprises the following steps:

[0089] In step S201, a first differential signal on a transmission path is adjusted according to a frequency of a radio frequency signal to obtain a second differential signal, wherein the radio frequency signal is a signal that interferes with the first differential signal.

[0090] The frequency of the radio frequency signal may include any frequency of the wireless radio frequency signal supported by the current terminal, for example, the frequency may include 3.5 GHz of the 5G NR band or 5.8 GHz of the WLAN band. The first differential signal refers to the differential signal sent by the differential signal transmitting end (or referred to as a "differential signal transmitting module") on the terminal, wherein the differential signal transmitting end may include a differential interface on the terminal for sending a digital differential signal, and the differential signal transmitting end may be, for example, a MIPI C-PHY high-speed differential interface provided on the camera module. In other words, the differential signal transmitting end is the signal input end of the signal transmission line for transmitting a digital differential signal.

[0091] The first differential signal refers to a digital differential signal that the differential signal sending end will send to the differential signal receiving end (such as the MIPI high-speed differential interface on the CPU) through the signal transmission line. The digital differential signal may, for example, include a signal transmitted between the camera and the CPU, a signal transmitted between the screen and the CPU, etc.

[0092] In one possible implementation, it is possible to detect whether the RF system in the terminal that may affect the transmission of the differential signal is turned on, and when it is determined that the RF system is turned on, the frequency of the RF signal transmitted by the RF system is obtained. Generally, when the antenna of the RF system is close to the signal transmission line of the differential signal, the high-power RF signal of the antenna may be coupled to the signal transmission line through the near field, thereby interfering with the differential signal transmitted on the signal transmission line. In the present disclosure, the anti-RF interference of the digital differential signal can be achieved by adjusting the first differential signal on the transmission route, wherein the transmission route may include the transmitting end or signal transmission line of the first differential signal.

[0093] It should be noted that, in a possible implementation, when the terminal detects that the RF system is not turned on, it can call the setting of the signal adjustment parameters (such as signal delay) inherent in the MIPI signal physical layer, and control the transmission of the MIPI signal based on the called signal adjustment parameters, wherein the signal delay is a parameter related to the phase of the signal.

[0094] In a possible implementation manner of this step, a signal adjustment parameter may be determined according to the frequency of the radio frequency signal; and the first differential signal may be adjusted by using the signal adjustment parameter.

[0095] Among them, the signal adjustment parameter may include signal delay and / or signal amplitude gain. Signal delay can represent the moment when the signal leaves the differential signal transmitting end. Different signal delays correspond to different signal phases. Signal amplitude gain is used to adjust the amplitude of the signal. For example, assuming that the signal amplitude gain is 1.2, if the amplitude of the signal before adjustment is X, after adjusting the signal amplitude based on the signal amplitude gain of 1.2, the adjusted signal amplitude becomes 1.2X. This is only an example, and the present disclosure is not limited to this.

[0096] It should also be noted that the purpose of the present disclosure is to perform denoising on the differential signal received by the differential signal receiving end (usually located in the processing unit of the terminal, such as the CPU), the differential signal includes two-way signals or three-way signals, and the CPU receiving end determines the data content sent by the signal sending end by comparing the difference between each two-way signal in the differential signal. However, if the differential signal is interfered by the radio frequency signal, the CPU receiving end cannot eliminate the interference signal after subtracting each two-way signal in the received differential signal, which will cause the CPU receiving end to be unable to decode the differential signal normally. It can be understood that the differential signal interfered by the interference signal leaves the differential signal transmitting end at different times, and the time when the signal reaches the differential signal receiving end through the signal transmission line is also different. Therefore, the present disclosure adjusts the signal delay of the first differential signal of the differential signal transmitting end so that the phase difference between each two interference signals in each signal of the differential signal received by the differential signal receiving end is less than or equal to the first set value. In this way, after the differential signal receiving end obtains the difference through each differential signal, the interference signal therein can be subtracted to a greater extent, thereby realizing the anti-radio frequency interference of the digital differential signal.

[0097] In one possible implementation, the corresponding signal adjustment parameters can be pre-set for the terminal before the terminal leaves the factory. Different RF frequencies usually correspond to different signal adjustment parameters. In this way, the correspondence between different RF frequencies that may cause interference and the signal adjustment parameters can be stored. The storage form includes but is not limited to tables and databases, and the storage location is generally a permanent memory.

[0098] In step S202, the second differential signal is transmitted to the differential signal receiving end, and in each channel of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the first set value.

[0099] In the present disclosure, the adjusted second differential signal can be transmitted to the differential signal receiving end through a signal transmission line.

[0100] For example, the camera module on the terminal sends a first differential signal carrying image data through a differential signal sending end. Before transmitting the first differential signal to the CPU receiving end, the terminal adjusts the signal delay of the first differential signal according to the frequency of the current RF signal to obtain a second differential signal. The terminal then transmits the adjusted second differential signal to the CPU receiving end through a signal transmission line.

[0101] By adopting the above method, the first differential signal on the transmission route can be adjusted to obtain a second differential signal based on the frequency of the radio frequency signal that interferes with the first differential signal. After the second differential signal is transmitted to the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal in each signal of the differential signal received by the differential signal receiving end is less than or equal to the target set value, so that after the differential signal receiving end obtains the difference through each differential signal, the interference signal therein is subtracted to a greater extent, thereby reducing the radio frequency interference effect of the radio frequency signal on the digital differential signal, realizing the anti-radio frequency interference of the digital differential signal, so that the differential signal receiving end can normally decode the received digital differential signal, thereby improving the anti-radio frequency interference performance of the high-speed differential signal on the terminal without increasing the hardware cost or sacrificing performance.

[0102] Figure 3 is based on Figure 2 The embodiment shown is a flowchart of a signal processing method, such as Figure 3 As shown, step S201 includes the following sub-steps:

[0103] In step S2011, a signal adjustment parameter is determined according to the frequency of the radio frequency signal.

[0104] The first differential signal includes at least two signals, and the signal adjustment parameter includes the signal adjustment parameter corresponding to at least one of the signals. Alternatively, the first differential signal includes n signals, where n is greater than or equal to 2; taking the signal adjustment parameter including the signal delay as an example, the signal delay includes the signal delay corresponding to n or n-1 signals.

[0105] In this step, the signal adjustment parameter corresponding to each signal in the n-1 signals may be searched from a preset corresponding relationship according to the frequency of the radio frequency signal.

[0106] Among them, the preset correspondence is the correspondence between different RF frequencies and signal adjustment parameters. Usually, different RF frequencies can correspond to different signal adjustment parameters. The signal adjustment parameters can be pre-calibrated before the terminal leaves the factory. The specific calibration process will be described later.

[0107] In step S2012, the first differential signal is adjusted using the signal adjustment parameter.

[0108] In this step, the second differential signal can be obtained by adjusting the phase and / or amplitude of at least one signal in the first differential signal according to the signal adjustment parameter corresponding to the signal. For example, if the signal adjustment parameter is a signal delay, the phase of n-1 signal in the n signals of the first differential signal can be adjusted according to the signal delay corresponding to the signal.

[0109] For example, assuming that the first differential signal includes two signals A and B (i.e., two signals A and B), by looking up the table, the signal delay of the B signal corresponding to the current frequency of the radio frequency signal is 10ps (picoseconds). In this way, the B signal can be adjusted to be transmitted with a delay of 10 picoseconds, and the A signal and the adjusted B signal form a second differential signal. Since the signal delay of the first differential signal at the differential signal transmitting end is adjusted, after the adjusted second differential signal is transmitted to the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal in the A and B signals of the differential signal received by the differential signal receiving end is less than or equal to the target setting value. In this way, after the A signal and the B signal in the differential signal received by the differential signal receiving end are differentiated, the interference signals in the two signals can be approximately offset, thereby achieving the purpose of anti-interference of the digital differential signal to the radio frequency signal. The above examples are only illustrative examples, and the present disclosure is not limited to this.

[0110] The following uses the MIPI C-PHY high-speed differential interface of the camera, which is susceptible to RF interference, as an example to explain in detail the specific method of adjusting the signal delay of the differential signal at the transmitter. Because the MIPI C-PHY interface does not contain a clock signal in its own signal, it needs to recover the clock signal from the data, which makes its high-speed differential interface more susceptible to RF interference. In addition, the MIPI C-PHY high-speed differential signal usually includes three signals, such as A, B, and C. The two signals corresponding to AB, BC, and AC respectively form a differential pair, and the two signals in a differential pair are subtracted and input into the CPU.

[0111] In one possible implementation, the phase of at least one signal in the first differential signal can be adjusted according to the signal delay corresponding to the signal, so that the phase difference of the interference signal in each signal of the differential signal received by the differential signal receiving end is less than or equal to the first set value.

[0112] For example, Figure 4a and Figure 4b is a schematic diagram showing a signal adjustment effect according to an exemplary embodiment. Figure 4a and Figure 4b Both show the waveforms of interference signals in the three signals included in the MIPI C-PHY high-speed differential signal, and Figure 4aThe waveform shown is the interference signal waveform observed at the CPU receiving end when the signal delay adjustment has not been performed on the MIPI C-PHY high-speed differential signal at the signal transmitting end. Figure 4b The waveform shown is the interference signal waveform observed at the CPU receiving end when the signal delay adjustment has been performed on the MIPI C-PHY high-speed differential signal at the signal transmitting end. Figure 4a and Figure 4b The top picture in each picture is the interference signal waveform after the CPU receiving end A, B, and C three-way signal differential reception, Figure 4a and Figure 4b The lower figure in each figure is a waveform diagram of the interference signal received by the CPU receiving end for each of the three signals A, B, and C in a single-ended manner. Figure 5a is with Figure 4a The corresponding eye diagram effect diagram, Figure 5b is with Figure 4b Schematic diagram of the corresponding eye diagram effect.

[0113] in addition, Figure 4a The corresponding signal transmission conditions are: RF signal frequency 3.5GHz, transmission power 22dBm, isolation from antenna to MIPI interface 26dB, and camera MIPI C-PHY transmission rate set to 2.9Gsps / trio. Figure 4b The corresponding signal transmission conditions are: RF signal frequency 3.5GHz, transmission power 22dBm, isolation from antenna to MIPI interface 26dB, camera MIPI C-PHY transmission rate is set to 2.9Gsps / trio, MIPI C-PHY high-speed differential signal includes three signals A, B, and C. The signal delay of signal B at the differential signal sending end increases by 5ps (picoseconds), and the signal delay of signal C at the differential signal sending end increases by 18ps (picoseconds).

[0114] like Figure 4a As shown in the figure, without adjusting the signal delay of the MIPI C-PHY high-speed differential signal at the signal transmitting end, the single-ended amplitude of the RF interference noise of the three channels A, B, and C observed at the CPU receiving end is about + / -210mV, and the maximum amplitude of the differential noise is about + / -71mV. Figure 5a From the eye diagram shown, we can see that when the signal delay adjustment is not performed on the MIPI C-PHY high-speed differential signal at the signal transmitter, the eye height of the CPU receiver is 86mV, the eye width is 233.8ps, and the eye height is close to the failure threshold of 80mV. Figure 4bAs shown in the figure, after adjusting the signal delay of the B and C signals in the MIPI C-PHY high-speed differential signal at the signal transmitter, the maximum amplitude of the differential noise of the A, B, and C RF interference noise signals observed at the CPU receiver is reduced to + / -30mV, and Figure 5b The eye diagram shows that after the signal delay adjustment of the MIPI C-PHY high-speed differential signal at the signal transmitter, the eye height becomes 166mV and the eye width becomes 277.9ps. Figure 5a Therefore, by adjusting the signal delay of at least one signal in the first differential signal of the differential signal transmitting end, a better anti-RF interference effect can be obtained.

[0115] In addition, considering that in the process of adjusting the first differential signal, if too large a relative delay is set for each signal of the first differential signal, the useful signal in the first differential signal will be distorted. In order to solve this problem, the present disclosure can reduce the differential signal transmission rate when the signal delay is greater than or equal to the signal delay threshold required by the eye diagram of the current differential signal transmission rate; or adjust the first differential signal according to the signal delay threshold when the signal delay is greater than or equal to the signal delay threshold required by the eye diagram of the current differential signal transmission rate.

[0116] The signal delay threshold refers to the maximum value of the signal delay determined according to the eye diagram requirement of the current differential signal transmission rate, and generally, the lower the differential signal transmission rate, the larger the corresponding signal delay threshold.

[0117] In the present disclosure, at the current differential signal transmission rate, if the signal delay adjusted to the first differential signal is greater than the signal delay threshold, useful signal distortion in the first differential signal may be caused. Therefore, in order to avoid the problem of useful signal distortion when the delay adjusted to the first differential signal is too large, the maximum value of the adjusted signal delay can be appropriately increased by reducing the differential signal transmission rate when the signal delay is determined to be greater than or equal to the signal delay threshold.

[0118] For example, based on the correspondence between the pre-calibrated differential signal transmission rate and the signal delay threshold, the signal delay threshold corresponding to the differential signal transmission rate at the current moment can be obtained by looking up a table, and then the relationship between the signal delay determined according to the frequency of the RF signal at the current moment and the signal delay threshold can be determined. When the signal delay is less than the signal delay threshold, the phase of the first differential signal can be adjusted directly based on the signal delay. When the signal delay is greater than or equal to the signal delay threshold, the adjustable signal delay can be appropriately increased by reducing the differential signal transmission rate to the target transmission rate. The target transmission rate can be the differential signal transmission rate corresponding to the current signal delay (i.e., the signal delay determined according to the frequency of the RF signal at the current moment).

[0119] In another possible implementation of the present disclosure, when the signal delay is greater than or equal to the signal delay threshold, the first differential signal can also be adjusted according to the signal delay threshold, that is, when it is determined that the signal delay determined according to the frequency of the radio frequency signal at the current moment is greater than or equal to the signal delay threshold, the delay size adjusted for each signal of the first differential signal is limited to the signal delay threshold, thereby avoiding the problem of distortion of useful signals in the first differential signal due to excessive adjustment of the signal delay.

[0120] The specific calibration methods of the signal adjustment parameters corresponding to different frequencies of the RF signal are described in detail below.

[0121] Figure 6 The present invention is a flow chart of a method for calibrating a signal adjustment parameter according to an exemplary embodiment. The method is mainly applied to parameter calibration scenarios before a terminal leaves the factory. The signal adjustment parameter includes at least one of a signal delay and a signal amplitude gain. Figure 6 As shown, the method comprises the following steps:

[0122] In step S601, the radio frequency system is controlled to transmit a radio frequency signal according to a preset radio frequency.

[0123] Among them, the preset radio frequency frequency may include multiple frequencies of wireless radio frequency signals supported by the terminal, such as 3.5 GHz in the 5G NR frequency band and 5.8 GHz in the WLAN frequency band.

[0124] In step S602, an interference signal is transmitted to the differential signal receiving end through a transmission path, wherein the interference signal is generated by the radio frequency signal transmitted by the radio frequency system.

[0125] In a possible implementation, during the process of calibrating the signal adjustment parameters before leaving the factory, the terminal can calibrate the signal adjustment parameters for each preset RF frequency. For each preset RF frequency, while controlling the RF system to transmit the RF signal according to the preset RF frequency, the differential signal transmitting end (such as the MIPI C-PHY high-speed differential interface in the camera module) to the differential signal receiving end (generally referring to the CPU receiving end) can be controlled to open the path. At this time, the transmitting end of the digital differential signal is in an enabled state, but the digital differential signal is not output, so that the digital differential signal received by the CPU receiving end only contains the interference signal generated by the RF signal. Afterwards, the signal adjustment parameter corresponding to the preset RF frequency can be determined based on the phase difference and / or amplitude difference of each signal in the interference signal received by the CPU receiving end.

[0126] In step S603, a signal adjustment parameter corresponding to the preset radio frequency is determined according to the phase difference and / or amplitude difference of the interference signal received by the differential signal receiving end.

[0127] Among them, the interference signal includes at least two signals. In this step, any one of the at least two interference signals can be determined as a reference signal; for each signal other than the reference signal in the at least two interference signals, the signal adjustment parameter corresponding to the signal at the preset RF frequency is determined based on the phase difference and / or amplitude difference between the signal at the differential signal receiving end and the reference signal.

[0128] For example, assuming that the interference signal includes two signals C and D (i.e., two interference signals C and D), the C signal can be used as a reference signal to obtain the phase difference between the D signal and the C signal transmitted on the signal transmission line. Based on the phase difference between the D signal and the C signal, the signal transmission delay difference X1 between the D signal and the C signal can be further determined. At this time, the signal delay of the D signal transmitted on the signal transmission line can be adjusted to X1, and then the difference Y1 in the signal amplitude between the D signal and the C signal in the interference signal received by the signal receiving end is recorded; then the signal is transmitted according to the preset step n (usually picosecond level). The signal delay is updated from X1 to X2 (i.e., |X2-X1|=n), and after the signal delay of the D-path signal transmitted on the signal transmission line is adjusted to X2, the difference Y2 in the signal amplitude between the D-path signal and the C-path signal in the interference signal received by the signal receiving end is recorded. By analogy, after adjusting the signal delay of the D-path signal transmitted on the signal transmission line for multiple times, multiple signal amplitude differences can be obtained. Then, when the difference in signal amplitude is the smallest, the corresponding signal delay is the signal delay that needs to be adjusted for the D-path signal transmitted on the signal transmission line under the current preset RF frequency. This is only an example and the present disclosure is not limited to this.

[0129] Figure 7 is a schematic diagram of a simulation model of a digital differential signal against radio frequency interference according to an exemplary embodiment. In a possible implementation, Figure 7 The simulation model shown realizes the pre-calibration of the signal delay.

[0130] like Figure 7 As shown, the camera sensor MIPI high-speed differential interface IBIS (Input-Output Buffer Information Specification) model 701 outputs MIPI C-PHY signals A, B, and C. Three signals 702 are connected to the camera MIPI interface extracted by the three-dimensional electromagnetic field model 703. The three-dimensional electromagnetic field model 703 contains the coupling degree extraction value from the RF antenna interface to the camera module MIPI routing. The coupling degree extraction value can reflect the isolation / coupling value of the RF emission of the device under test as an interference signal coupled to the camera module and the board-to-board connector through the antenna. The MIPI C-PHY signal coupled with RF noise is transmitted along the board-to-board connector to the MIPI high-speed differential interface motherboard routing model 704, and finally output to the CPU-side MIPI high-speed differential interface IBIS model 705. The simulation model can determine the signal adjustment parameters corresponding to each preset RF frequency through the eye height and eye width corresponding to the key parameter eye diagram of the high-speed differential signal observed at the CPU receiving end, as well as the amplitude of the interference signal.

[0131] After determining the signal delay, the signal delay corresponding to each preset RF frequency can be stored, and the storage form includes but is not limited to the form of a table or a database, so that after the terminal leaves the factory, the signal delay can be found based on the RF frequency of the actual RF signal of the terminal, and then the phase of the high-speed digital differential signal at the differential signal transmitting end is adjusted based on the signal delay. After the adjusted differential signal is transmitted to the CPU receiving end, the interference signal in the differential signal received by the CPU receiving end is nearly offset after differentiation, thereby removing the RF interference signal in the digital differential signal, realizing the anti-RF interference of the digital differential signal, and allowing the CPU end to decode the received digital differential signal normally.

[0132] In another possible implementation, the effect of resisting radio frequency interference can also be achieved by adjusting the signal amplitude gain. Therefore, the signal adjustment parameter can also include the signal amplitude gain. In this way, the amplitude of at least one signal in the first differential signal can be adjusted according to the signal amplitude gain corresponding to the signal. In this way, the amplitude difference of the interference signal generated by the radio frequency signal in each signal of the differential signal received by the differential signal receiving end can be less than or equal to the second set value.

[0133] Among them, in the process of adjusting the amplitude of the signal according to the signal amplitude gain corresponding to the signal, the amplitude of the signal can be adjusted by RxEQ (Receiver Equalizer) according to the signal amplitude gain corresponding to the signal. In other words, the signal amplitude can be adjusted based on RxEQ for each signal. RxEQ is a digital signal processing technology used to improve the quality of digital signals when the signals are interfered or distorted, making them easier to decode and identify. RxEQ is usually used in digital communication systems to correct and restore received signals to enhance the signal quality and reliability of the receiving end.

[0134] In addition, when excessive RF noise is superimposed on the digital differential signal and the signal amplitude received by the CPU exceeds the chip safety threshold, an additional CMF (Common Mode Filter) is required to filter the differential signal in the signal transmission line, thereby reducing the amplitude of the interference signal and reducing the amplitude of the interference signal to within the safety amplitude range of the high-speed differential interface. The CMF can be connected to the transmission link of the differential signal (such as the signal transmission line).

[0135] Therefore, in a possible implementation of the present disclosure, the interference signal is an interference signal whose amplitude is reduced to a target amplitude by a common mode filter CMF, and the target amplitude is a signal amplitude pre-set according to a signal amplitude safety threshold value corresponding to a processing unit of the terminal. The processing unit may be, for example, a CPU or a GPU (Graphics Processing Unit).

[0136] In addition, the transmission rate of the first differential signal in the present disclosure can be determined according to the delay characteristics of CMF, which refers to the influence of CMF on the delay difference between each signal path. Generally speaking, CMF has a greater influence on the delay difference between each signal path of high-frequency signals, and a smaller influence on the delay difference between each signal path of low-frequency signals. In a possible application scenario, the greater the delay difference of the signal affected by the CMF, the lower the transmission rate of the first differential signal.

[0137] Due to the characteristics of the CMF device itself, while adjusting the signal amplitude through CMF, CMF will also have an impact on the transmission delay of the signal. In the present disclosure, a CMF corresponds to multiple signals, and the transmission delay difference of each signal is also large, which will cause a large phase imbalance in the digital differential link. For this scenario, the anti-RF interference capability can be improved by reducing the transmission rate of high-speed differential signals (such as MIPI signals). For example, the signal transmission rate of the MIPI signal can be reduced from 2.9Gsps / trio to 1.7Gsps / trio. By reducing the signal transmission rate of the MIPI signal, the impact of the MIPI signal phase change on the eye width can be reduced.

[0138] In a possible implementation, the transmission rate of the first differential signal can be calibrated in advance according to the CMF model. Different models of CMF have different corresponding delay characteristics. In this way, after the terminal leaves the factory, the target rate matching the CMF model can be obtained according to the current CMF model of the terminal as the transmission rate of the first differential signal. Generally, the greater the delay of the CMF to the interference signal, the lower the transmission rate of the first differential signal.

[0139] Taking into account the actual application scenarios, if the current RF system operating frequency is a frequency with a relatively small delay difference when passing through CMF (for example, the signal delay corresponding to the frequency of the current RF signal is 10ps), the adjustment amount required to align the phase of the interference signal is also relatively small, and the alignment action has little impact on the first differential signal, so the transmission rate of the first differential signal can be appropriately increased at this time; if the current RF system operating frequency is a frequency with a relatively large delay difference when passing through CMF (for example, the signal delay corresponding to the frequency of the current RF signal is 80ps), the adjustment amount required to align the phase of the interference signal is also relatively large, and the alignment action has a large impact on the first differential signal, so the transmission rate of the first differential signal needs to be appropriately reduced at this time, so as to ensure the transmission quality of the useful signal in the first differential signal.

[0140] Therefore, the present disclosure can pre-calibrate the correspondence between the frequency of the RF signal and the transmission rate of the first differential signal according to the degree to which the frequency of the RF signal is affected by the CMF delay. In this way, the transmission rate of the first differential signal can be adjusted in real time according to the degree to which the frequency of the RF signal that interferes with the first differential signal is affected by the CMF delay, and the frequency of the RF signal being transmitted in the current RF system.

[0141] In one possible implementation, based on the correspondence between the frequency of the RF signal and the transmission rate of the first differential signal, a target rate corresponding to the frequency of the RF signal currently being transmitted can be determined as the transmission rate of the first differential signal, thereby achieving real-time adjustment of the transmission rate of the first differential signal.

[0142] Figure 8 is a block diagram of a signal processing device according to an exemplary embodiment. Figure 8 , the device comprises:

[0143] The signal adjustment module 801 is configured to adjust the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal, wherein the radio frequency signal is a signal that interferes with the first differential signal;

[0144] The signal transmission module 802 is configured to transmit the second differential signal to the differential signal receiving end, wherein the phase difference of the interference signal generated by the radio frequency signal in each signal of the differential signal received by the differential signal receiving end is less than or equal to the first set value.

[0145] Optionally, the transmission route includes a transmitting end or a signal transmission line of the first differential signal.

[0146] Optionally, the signal adjustment module 801 is configured to determine a signal adjustment parameter according to the frequency of the radio frequency signal; and adjust the first differential signal according to the signal adjustment parameter.

[0147] Optionally, the first differential signal includes at least two signals, and the signal adjustment parameters include signal adjustment parameters corresponding to at least one of the signals.

[0148] Optionally, the signal adjustment parameters include signal delay, the first differential signal includes n signals, and the signal delay includes signal delays corresponding to n or n-1 signals, respectively, where n is greater than or equal to 2; the signal adjustment module 801 is configured to adjust the phase of the n-1 signal among the n signals according to the signal delay corresponding to the signal.

[0149] Optionally, the signal adjustment module 801 is configured to search for the signal adjustment parameter corresponding to each signal in the n-1 signals from a preset correspondence relationship according to the frequency of the radio frequency signal.

[0150] Optionally, the signal adjustment module 801 is also configured to reduce the differential signal transmission rate when the signal delay is greater than or equal to the signal delay threshold required by the eye diagram of the current differential signal transmission rate; or to adjust the first differential signal according to the signal delay threshold when the signal delay is greater than or equal to the signal delay threshold required by the eye diagram of the current differential signal transmission rate.

[0151] Optionally, Fig. 9 is based on Figure 8 The block diagram of a signal processing device shown in the embodiment shown in FIG. Fig. 9 As shown, the device also includes a parameter calibration module 803, which is configured to pre-calibrate the signal adjustment parameters in the following manner: control the RF system to transmit the RF signal at a preset RF frequency; transmit the interference signal to the differential signal receiving end through the transmission route, the interference signal is generated by the RF signal transmitted by the RF system; determine the signal adjustment parameter corresponding to the preset RF frequency according to the phase difference and / or amplitude difference of the interference signal at the differential signal receiving end.

[0152] Optionally, the interference signal includes at least two paths, and the parameter calibration module 803 is configured to: determine any one of the at least two interference signals as a reference signal; for each of the at least two interference signals except the reference signal, determine the signal adjustment parameter corresponding to the signal at the preset RF frequency based on the phase difference and / or amplitude difference between the signal at the differential signal receiving end and the reference signal.

[0153] Optionally, in each channel of the differential signal received by the differential signal receiving end, the amplitude difference of the interference signal generated by the radio frequency signal is less than or equal to a second set value.

[0154] Optionally, the signal adjustment parameter includes a signal amplitude gain, and the signal adjustment module 801 is configured to: for at least one signal in the first differential signal, adjust the amplitude of the signal according to the signal amplitude gain corresponding to the signal.

[0155] Optionally, the signal adjustment module 801 is configured to: adjust the amplitude of the signal through a receiving equalizer RxEQ according to the signal amplitude gain corresponding to the signal.

[0156] Optionally, the interference signal is an interference signal whose amplitude is reduced to a target amplitude by a common mode filter CMF, and the target amplitude is a signal amplitude pre-set according to a signal amplitude safety threshold value corresponding to a processing unit of the terminal.

[0157] Optionally, the transmission rate of the first differential signal is determined according to a delay characteristic of the CMF.

[0158] Optionally, the greater the delay difference caused by the CMF on the signal, the lower the transmission rate of the first differential signal.

[0159] Optionally, the signal adjustment module 801 is configured to adjust the transmission rate of the first differential signal in real time according to the degree to which the frequency of the RF signal that interferes with the first differential signal is affected by the CMF delay, and the frequency of the RF signal being transmitted in the current RF system.

[0160] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0161] Fig.10 is a structural block diagram of an electronic device according to an exemplary embodiment. Fig.10 As shown, the electronic device 1000 includes:

[0162] A differential signal sending module 1001, a processing unit 1002 and a radio frequency module 1003;

[0163] Among them, a signal transmission line 1004 is connected between the differential signal sending module 1001 and the processing unit 1002, and the differential signal sending module 1001 transmits the differential signal to the processing unit 1002 through the signal transmission line 1004; the processing unit 1002 can be, for example, a CPU or a GPU.

[0164] The radio frequency signal transmitted by the radio frequency module 1003 interferes with the differential signal transmitted on the signal transmission line 1004 through near-field coupling;

[0165] In addition, in this electronic device, the distance between the RF module 1003 and the signal transmission line 1004 is relatively close, so that when the RF module 1003 transmits a RF signal outward through the antenna, the RF signal can be coupled to the signal transmission line 1004 through the near field, thereby interfering with the differential signal transmitted on the signal transmission line 1004.

[0166] The differential signal sending module 1001 is configured to adjust the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal, where the radio frequency signal is transmitted by the radio frequency module 1003 and interferes with the first differential signal; the second differential signal is transmitted to the differential signal receiving end on the processing unit 1002, and in each signal of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the first set value.

[0167] Optionally, the transmission route includes a sending end of the first differential signal or the signal transmission line 1004. The sending end of the first differential signal is usually located in the differential signal sending module 1001.

[0168] Optionally, the differential signal sending module 1001 includes a camera module and / or a screen.

[0169] Optionally, the signal transmission line 1004 includes a mobile industry processor interface MIPI signal line.

[0170] Optionally, the differential signal sending module 1001 is configured to determine a signal adjustment parameter according to the frequency of the radio frequency signal; and adjust the first differential signal according to the signal adjustment parameter.

[0171] Optionally, the first differential signal includes at least two signals, and the signal adjustment parameters include signal adjustment parameters corresponding to at least one of the signals.

[0172] Optionally, the signal adjustment parameter is pre-calibrated in the following manner:

[0173] The RF module 1003 transmits RF signals according to a preset RF frequency;

[0174] Transmitting an interference signal to the differential signal receiving end through the transmission route, wherein the interference signal is generated by the radio frequency signal transmitted by the radio frequency module 1003;

[0175] The signal adjustment parameter corresponding to the preset radio frequency frequency is determined according to the phase difference and / or amplitude difference of the interference signal at the differential signal receiving end.

[0176] Optionally, the signal adjustment parameter includes signal delay and / or signal amplitude gain.

[0177] Optionally, in each channel of the differential signal received by the differential signal receiving end, the amplitude difference of the interference signal generated by the radio frequency signal is less than or equal to a second set value.

[0178] Optionally, Fig.11 is based on Fig.10 The structural block diagram of an electronic device shown in the embodiment shown in FIG. Fig.11 As shown, the electronic device 1000 further includes a common mode filter CMF1005, and the CMF1005 is connected to the signal transmission line 1004; the second differential signal is transmitted to the processing unit 1002 through the CMF1005;

[0179] The interference signal is an interference signal whose amplitude is reduced to a target amplitude by CMF1005 , and the target amplitude is a signal amplitude pre-set according to a signal amplitude safety threshold value corresponding to the processing unit 1002 .

[0180] Optionally, the transmission rate of the first differential signal is determined according to a delay characteristic of the CMF1005.

[0181] Regarding the electronic device in the above embodiment, its specific method has been described in detail in the embodiment of the method, and will not be elaborated here.

[0182] Fig.12 1 is a block diagram of a signal processing apparatus 1200 according to an exemplary embodiment. For example, the apparatus 1200 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0183] Reference Fig.12 , the device 1200 may include one or more of the following components: a processing component 1202 , a memory 1204 , a power component 1206 , a multimedia component 1208 , an audio component 1210 , an input / output interface 1212 , a sensor component 1214 , and a communication component 1216 .

[0184] The processing component 1202 generally controls the overall operation of the device 1200, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 1202 may include one or more processors 1220 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 1202 may include one or more modules to facilitate the interaction between the processing component 1202 and other components. For example, the processing component 1202 may include a multimedia module to facilitate the interaction between the multimedia component 1208 and the processing component 1202.

[0185] The memory 1204 is configured to store various types of data to support the operation of the device 1200. Examples of such data include instructions for any application or method operating on the device 1200, contact data, phone book data, messages, pictures, videos, etc. The memory 1204 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0186] The power supply component 1206 provides power to the various components of the device 1200. The power supply component 1206 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 1200.

[0187] The multimedia component 1208 includes a screen that provides an output interface between the device 1200 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 1208 includes a front camera and / or a rear camera. When the device 1200 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0188] The audio component 1210 is configured to output and / or input audio signals. For example, the audio component 1210 includes a microphone (MIC), and when the device 1200 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 1204 or sent via the communication component 1216. In some embodiments, the audio component 1210 also includes a speaker for outputting audio signals.

[0189] The input / output interface 1212 provides an interface between the processing component 1202 and the peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0190] The sensor assembly 1214 includes one or more sensors for providing various aspects of the status assessment of the device 1200. For example, the sensor assembly 1214 can detect the open / closed state of the device 1200, the relative positioning of components, such as the display and keypad of the device 1200, the sensor assembly 1214 can also detect the position change of the device 1200 or a component of the device 1200, the presence or absence of user contact with the device 1200, the orientation or acceleration / deceleration of the device 1200, and the temperature change of the device 1200. The sensor assembly 1214 can include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 1214 can also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1214 can also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0191] The communication component 1216 is configured to facilitate wired or wireless communication between the device 1200 and other devices. The device 1200 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 1216 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1216 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0192] In an exemplary embodiment, the device 1200 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above-mentioned signal processing method.

[0193] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 1204 including instructions, and the instructions can be executed by the processor 1220 of the device 1200 to perform the above signal processing method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0194] In addition to being an independent electronic device, the above-mentioned device can also be a part of an independent electronic device. For example, in one embodiment, the device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be an IC or a collection of multiple ICs; the chip can include but is not limited to the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip, SoC, system on chip or system-level chip), etc. The above-mentioned integrated circuit or chip can be used to execute executable instructions (or codes) to implement the above-mentioned signal processing method. The executable instructions can be stored in the integrated circuit or chip, or can be obtained from other devices or equipment, such as the integrated circuit or chip includes a processor, a memory, and an interface for communicating with other devices. The executable instruction may be stored in the memory, and when the executable instruction is executed by the processor, the above-mentioned signal processing method may be implemented; alternatively, the integrated circuit or chip may receive the executable instruction through the interface and transmit it to the processor for execution, so as to implement the above-mentioned signal processing method.

[0195] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the above-mentioned signal processing method when executed by the programmable device.

[0196] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0197] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A signal processing method, characterized in that: include: Adjusting the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal, wherein the radio frequency signal is a signal that interferes with the first differential signal; The second differential signal is transmitted to the differential signal receiving end, and in each channel of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the first set value.

2. The method according to claim 1, characterized in that: The transmission route includes a transmitting end or a signal transmission line of the first differential signal.

3. The method according to claim 1, characterized in that The step of adjusting the first differential signal on the transmission path according to the frequency of the radio frequency signal comprises: Determining a signal adjustment parameter according to the frequency of the radio frequency signal; The first differential signal is adjusted by the signal adjustment parameter.

4. The method according to claim 3, characterized in that The first differential signal includes at least two signals, and the signal adjustment parameters include signal adjustment parameters corresponding to at least one of the signals.

5. The method according to claim 3, characterized in that: The signal adjustment parameter includes a signal delay, the first differential signal includes n signals, the signal delay includes signal delays corresponding to n or n-1 signals, respectively, wherein n is greater than or equal to 2; and adjusting the first differential signal by using the signal adjustment parameter includes: For n-1 signal among the n signals, the phase of the signal is adjusted according to the signal delay corresponding to the signal.

6. The method according to claim 5, characterized in that The determining of the signal adjustment parameter according to the frequency of the radio frequency signal includes: According to the frequency of the radio frequency signal, the signal adjustment parameter corresponding to each signal in the n-1 signals is searched from a preset corresponding relationship.

7. The method according to claim 5, characterized in that The method further comprises: When the signal delay is greater than or equal to the signal delay threshold required by the eye diagram of the current differential signal transmission rate, reduce the differential signal transmission rate; or, When the signal delay is greater than or equal to the signal delay threshold required by the eye diagram of the current differential signal transmission rate, the first differential signal is adjusted according to the signal delay threshold.

8. The method according to claim 3, characterized in that The signal adjustment parameters are pre-calibrated in the following manner: Control the radio frequency system to transmit radio frequency signals according to a preset radio frequency frequency; Transmitting an interference signal to the differential signal receiving end through the transmission route, wherein the interference signal is generated by the radio frequency signal transmitted by the radio frequency system; The signal adjustment parameter corresponding to the preset radio frequency frequency is determined according to the phase difference and / or amplitude difference of the interference signal at the differential signal receiving end.

9. The method according to claim 8, characterized in that The interference signal includes at least two paths, and determining the signal adjustment parameter corresponding to the preset radio frequency according to the phase difference and / or amplitude difference of the interference signal at the differential signal receiving end includes: Determine any one of at least two interference signals as a reference signal; For each signal other than the reference signal in at least two interference signals, a signal adjustment parameter corresponding to the signal at the preset RF frequency is determined according to a phase difference and / or amplitude difference between the signal at the differential signal receiving end and the reference signal.

10. The method according to claim 3, characterized in that: In each channel of the differential signal received by the differential signal receiving end, the amplitude difference of the interference signal generated by the radio frequency signal is less than or equal to the second set value.

11. The method according to claim 10, characterized in that The signal adjustment parameter includes a signal amplitude gain, and adjusting the first differential signal by using the signal adjustment parameter includes: For at least one signal in the first differential signal, the amplitude of the signal is adjusted according to the signal amplitude gain corresponding to the signal.

12. The method according to claim 11, characterized in that The adjusting the amplitude of the signal according to the signal amplitude gain corresponding to the signal includes: The amplitude of the signal is adjusted through the receiving equalizer RxEQ according to the signal amplitude gain corresponding to the signal.

13. The method according to any one of claims 1 to 12, characterized in that: The interference signal is an interference signal whose amplitude is reduced to a target amplitude by a common mode filter CMF, and the target amplitude is a signal amplitude pre-set according to a signal amplitude safety threshold value corresponding to a processing unit of the terminal.

14. The method according to claim 13, characterized in that The transmission rate of the first differential signal is determined according to the delay characteristics of the CMF.

15. The method according to claim 14, characterized in that The greater the delay difference caused by the CMF on the signal, the lower the transmission rate of the first differential signal.

16. The method according to claim 14, characterized in that include: The transmission rate of the first differential signal is adjusted in real time according to the degree to which the frequency of the radio frequency signal interfering with the first differential signal is affected by the CMF delay and the frequency of the radio frequency signal being transmitted in the current radio frequency system.

17. A signal processing device, characterized in that: include: A signal adjustment module, configured to adjust the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal, wherein the radio frequency signal is a signal that interferes with the first differential signal; The signal transmission module is configured to transmit the second differential signal to the differential signal receiving end, wherein the phase difference of the interference signal generated by the radio frequency signal in each channel of the differential signal received by the differential signal receiving end is less than or equal to a first set value.

18. An electronic device, characterized in that: include: Differential signal transmission module, processing unit and radio frequency module; Wherein, a signal transmission line is connected between the differential signal sending module and the processing unit, and the differential signal sending module transmits the differential signal to the processing unit through the signal transmission line; The radio frequency signal transmitted by the radio frequency module interferes with the differential signal transmitted on the signal transmission line through near-field coupling; The differential signal sending module is configured to adjust the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal; the second differential signal is transmitted to the differential signal receiving end on the processing unit, and in each signal of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the first set value.

19. The electronic device according to claim 18, characterized in that: The transmission route includes a transmitting end of the first differential signal or the signal transmission line.

20. The electronic device according to claim 18, characterized in that The differential signal sending module includes a camera module and / or a screen.

21. The electronic device according to claim 18, characterized in that: The signal transmission line includes a mobile industry processor interface MIPI signal line.

22. The electronic device according to claim 18, characterized in that: The differential signal sending module is configured to determine a signal adjustment parameter according to the frequency of the radio frequency signal; and adjust the first differential signal according to the signal adjustment parameter.

23. The electronic device according to claim 22, characterized in that: The first differential signal includes at least two signals, and the signal adjustment parameters include signal adjustment parameters corresponding to at least one of the signals.

24. The electronic device according to claim 22, characterized in that: The signal adjustment parameters are pre-calibrated in the following manner: The radio frequency module transmits a radio frequency signal according to a preset radio frequency frequency; Transmitting an interference signal to the differential signal receiving end through the transmission route, wherein the interference signal is generated by the radio frequency signal transmitted by the radio frequency module; The signal adjustment parameter corresponding to the preset radio frequency frequency is determined according to the phase difference and / or amplitude difference of the interference signal at the differential signal receiving end.

25. The electronic device according to claim 22, characterized in that: The signal adjustment parameters include signal delay and / or signal amplitude gain.

26. The electronic device according to claim 18, characterized in that: In each channel of the differential signal received by the differential signal receiving end, the amplitude difference of the interference signal generated by the radio frequency signal is less than or equal to the second set value.

27. The electronic device according to any one of claims 18 to 26, characterized in that: The electronic device further comprises a common mode filter CMF, wherein the CMF is connected to the signal transmission line; the second differential signal is transmitted to the processing unit through the CMF; The interference signal is an interference signal whose amplitude is reduced to a target amplitude by the CMF, and the target amplitude is a signal amplitude pre-set according to a signal amplitude safety threshold value corresponding to the processing unit.

28. The electronic device according to claim 27, characterized in that: The transmission rate of the first differential signal is determined according to the delay characteristics of the CMF.

29. A signal processing device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: Adjusting the first differential signal on the transmission path according to the frequency of the radio frequency signal to obtain a second differential signal, wherein the radio frequency signal is a signal that interferes with the first differential signal; The second differential signal is transmitted to the differential signal receiving end, and in each channel of the differential signal received by the differential signal receiving end, the phase difference of the interference signal generated by the radio frequency signal is less than or equal to the first set value.

30. A chip, characterized in that: The method comprises a processor and an interface; the processor is used to read instructions to execute the method according to any one of claims 1 to 16.

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