CN117560024A - Data transmission device and method for processing interference signal - Google Patents

Data transmission device and method for processing interference signal Download PDF

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Publication number
CN117560024A
CN117560024A CN202311622952.2A CN202311622952A CN117560024A CN 117560024 A CN117560024 A CN 117560024A CN 202311622952 A CN202311622952 A CN 202311622952A CN 117560024 A CN117560024 A CN 117560024A
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China
Prior art keywords
signal
radio frequency
frequency interference
circuit
phase
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CN202311622952.2A
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Chinese (zh)
Inventor
陈隆讯
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202311622952.2A priority Critical patent/CN117560024A/en
Publication of CN117560024A publication Critical patent/CN117560024A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

An apparatus for data transmission and a method of processing an interference signal are provided. The data transmission device comprises: an application module; the transmission circuit is connected with the application module and the processor and is used for transmitting communication signals between the application module and the processor, and radio frequency interference signals are introduced into the transmission circuit; the detection circuit is connected with the detection point in the transmission circuit and is used for detecting the sampling signal of the radio frequency interference signal and the phase of the sampling signal; the processing circuit is provided with an input end and an output end, the input end is connected with the detection circuit, the output end is connected with the coupling point of the transmission circuit, the processing circuit is used for generating a counteracting signal according to the sampling signal, the counteracting signal is used for coupling the radio frequency interference signal in the coupling point and the transmission circuit, the amplitude of the counteracting signal is the same as that of the radio frequency interference signal, and the phase of the counteracting signal is opposite to that of the radio frequency interference signal. The embodiment of the application is beneficial to reducing radio frequency interference signals in a transmission circuit.

Description

Data transmission device and method for processing interference signal
Technical Field
The embodiments of the present application relate to the field of data transmission technologies, and more particularly, to a data transmission apparatus and a method for processing an interference signal.
Background
Data is typically transferred between some of the chips and modules in an electronic device. In a mobile phone, an interface between the camera module and the main processor adopts a communication protocol for data transmission. When data transmission is carried out between the camera module and the main processor, the arrangement of some antennas is compact, and particularly in a structure close to the camera, the radio frequency function of the antennas can generate serious interference on the camera. The influence factors of the antenna interference cameras are more, the interference path is complex, and the interference to each mobile phone is difficult to eliminate by adopting the conventional grounding shielding filtering mode and the like.
Disclosure of Invention
The embodiment of the application provides a data transmission device and a method for processing interference signals. Aspects related to embodiments of the present application are described below.
In a first aspect, there is provided an apparatus for data transmission, comprising: an application module; the transmission circuit is connected with the application module and the processor and is used for transmitting communication signals between the application module and the processor, and radio frequency interference signals are introduced into the transmission circuit; the detection circuit is connected with the detection point in the transmission circuit and is used for detecting the sampling signal of the radio frequency interference signal and the phase of the sampling signal; the processing circuit is provided with an input end and an output end, the input end is connected with the detection circuit, the output end is connected with a coupling point of the transmission circuit, the processing circuit is used for generating a counteracting signal according to the sampling signal, the counteracting signal is used for coupling the coupling point with the radio frequency interference signal in the transmission circuit, the amplitude of the counteracting signal is identical to that of the radio frequency interference signal, the phase of the counteracting signal is opposite to that of the radio frequency interference signal, and the coupling point is positioned between the processor and the detection point.
In a second aspect, there is provided a method of processing an interference signal, applied to an apparatus for data transmission, the apparatus comprising: an application module; the transmission circuit is connected with the application module and the processor and is used for transmitting communication signals between the application module and the processor, and radio frequency interference signals are introduced into the transmission circuit; the detection circuit is connected with a detection point in the transmission circuit and is used for detecting a sampling signal of the radio frequency interference signal; the processing circuit is provided with an input end and an output end, the input end is connected with the detection circuit, the output end is connected with a coupling point of the transmission circuit, and the coupling point is positioned between the processor and the detection point; the method comprises the following steps: extracting a sampling signal of the radio frequency interference signal and detecting information of the sampling signal; processing the sampling signal to generate a counteracting signal, wherein the amplitude of the counteracting signal is the same as that of the radio frequency interference signal, and the phase of the counteracting signal is opposite to that of the radio frequency interference signal; and coupling the cancellation signal with the radio frequency interference signal at a coupling point of the transmission circuit.
In a third aspect, there is provided an electronic device comprising an apparatus for data transmission as described in the first aspect.
In a fourth aspect, there is provided a non-transitory computer readable storage medium having stored thereon a computer program for implementing the method according to the second aspect when executed.
In a fifth aspect, there is provided a computer program or computer program product comprising instructions for performing the method of the second aspect.
In the embodiment of the application, the radio frequency interference signal in the connection circuit between the application module and the processor is sampled, and the offset signal is generated according to the sampled signal, and is coupled with the radio frequency interference signal at the coupling point. Because the amplitude of the counteraction signal is the same as that of the radio frequency interference signal, and the phase of the counteraction signal is opposite to that of the radio frequency interference signal, the radio frequency interference signal component in the transmission circuit can be greatly attenuated, and the normal communication signal in the transmission circuit is reserved. The method and the device are favorable for reducing radio frequency interference signals in the transmission circuit, improving the radio frequency interference resistance of data transmission between the application module and the processor and are wide in applicability.
Drawings
Fig. 1 is a schematic diagram of an arrangement of a mobile phone antenna.
Fig. 2 is a schematic structural diagram of a device for data transmission according to an embodiment of the present application.
Fig. 3 is a schematic diagram of one possible implementation of the apparatus of fig. 2.
Fig. 4 is a flowchart of a method for data transmission according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a component unit/a part of a component unit of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
It should be understood that the electronic device in the embodiments of the present application may also be referred to as a terminal device, a terminal, a User Equipment (UE), a user terminal, an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a Mobile Terminal (MT), a remote terminal, a remote station, a mobile device, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the application can be a device for providing voice and/or data connectivity for a user, and can be used for connecting people, things and machines, such as a handheld device with a wireless connection function, a vehicle-mounted device and the like. The terminal device in the embodiments of the present application may be a mobile phone (mobile phone), a tablet (Pad), a notebook, a palm, a mobile internet device (mobile internet device, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), or the like. Alternatively, the UE may be used to act as a base station. For example, the UEs may act as scheduling entities that provide side-uplink signals between UEs in V2X or D2D, etc. For example, a cellular telephone and a car communicate with each other using side-link signals. Communication between the cellular telephone and the smart home device is accomplished without relaying communication signals through the base station.
With the advent of the 5G age, the number of antennas for 5G handsets is increasing. Meanwhile, in order to meet the demands of users, the number of cameras is increased, functions are increased, and the occupied area of the cameras is increased. The requirements of people on pixels of the camera module of the mobile equipment are higher and higher, and meanwhile, the requirements on the transmission speed are also higher and higher.
The purpose of the mobile industry processor interface (mobile industry processor interface, MIPI) is to standardize interfaces within the handset, such as cameras, display interfaces, radio frequency/baseband interfaces, etc., thereby reducing the complexity of the handset design and increasing design flexibility. The camera module adopting the MIPI interface has the advantages of high speed, large transmission data volume, low power consumption, good interference resistance and the like.
Under limited mobile phone motherboard area, can not appear the camera next antenna, lead to antenna emission signal to interfere with the camera. Fig. 1 is a schematic diagram of an arrangement of a mobile phone antenna. As shown in fig. 1, a plurality of antennas, such as ANT1, ANT2, are typically arranged around the camera. The radio frequency function of the antenna can generate serious interference to the camera, so that the camera or display signals are abnormal, and the problems of shooting, blocking, screen display and the like are solved.
The problems of shooting blocking and screen display are caused by more influencing factors, the interference path is complex, and each mobile phone of a user is difficult to ensure to be free from interference. The main causes of the interference are as follows:
1) Structural space, materials, etc. The degree of interference experienced by cameras between different handsets can vary greatly.
2) The user uses the scene numerous, and the research and development stage is difficult to test and cover all scenes. For example, various hand-held mobile phone modes, mobile phones placed on a metal desktop and the like have larger difference in interference degree, so that the problem of interference in partial scenes still occurs.
3) Due to the increase of the using time, the materials age, the performance is reduced, and the interference situation is increased. Previously unproblematic devices, after a period of use, may also present interference problems.
Therefore, the influence factors of the antenna interference camera are more, the interference path is complex, and the interference of each mobile phone is difficult to eliminate by adopting hardware means such as conventional grounding shielding filtering and the like. Meanwhile, the user scenes are various, the factors such as the use environment and material aging are difficult to comprehensively identify the problem sources in all scenes in the research and development stage, and the risk of problem omission exists. If the camera cannot be prevented from being interfered by radio frequency, the performance and the user experience of the camera module are affected.
Therefore, it is necessary to design a data transmission technical scheme of an application module for reducing radio frequency interference.
It should be noted that the above-mentioned problem of solving the problem that the mobile phone camera module is interfered by the antenna radio frequency is only an example, and the embodiments of the present application may be applied to any type of scenario that the application module of the electronic device and the data transmission of the processor are interfered by the radio frequency.
Based on this, the embodiment of the application proposes a device for data transmission. Fig. 2 is a schematic diagram of the composition of a data transmission device according to an embodiment of the present application. The apparatus for data transmission according to the embodiment of the present application will be described in detail with reference to fig. 2. As shown in fig. 2, the apparatus 200 for data transmission may include: application module 210, processor 220, connection circuitry 230, detection circuitry 240, and processing circuitry 250.
The application module 210, alternatively referred to as a functional module, may have a certain specific function. For example, camera modules, sensor (pressure, distance, temperature, humidity, etc.) modules are possible.
The application module 210 typically has a communication protocol interface, which may be, for example, a MIPI interface. The MIPI interface may be a DPHY communication protocol interface and/or a CPHY communication protocol interface, etc.
The processor 220 has a communication protocol interface, which may be, for example, a MIPI interface. The MIPI interface may be a DPHY communication protocol interface and/or a CPHY communication protocol interface.
The connection circuit 230 is used to connect the application module 210 with the processor 220. The connection circuit 230 is alternatively referred to as a connector, a connection wire. The connection circuit 230 is used to transmit communication signals between the application module 210 and the processor 220. The connection circuit 230 may have multiple sets of channels, which may include a data channel and a clock channel.
In some implementations, an antenna for receiving and transmitting radio frequency signals is disposed around the application module 210, and the antenna generates radio frequency interference to the connection circuit 230, that is, a radio frequency interference signal is introduced into (at) an interference introducing point of the transmission circuit. The interference introducing point of the transmission circuit may be one or more. After the product structure, the application environment are determined, the point of introduction of the interference of the transmission circuit is usually determined. In the embodiment of the present application, the interference introducing point is referred to as an interference introducing point, and the coupling point is referred to as a coupling point, which is not distinguished.
In some implementations, the radio frequency interference distribution at the connection circuit 230 may be determined by means of energy bin scanning, and the interference introduction of the transmission circuit may be determined.
The detection circuit 240 is connected to the detection point of the transmission circuit 230, and is configured to detect a sampling signal of the radio frequency interference signal and detect information of the sampling signal. In some embodiments, detection circuit 240 may detect phase information of the sampled signal. In other embodiments, the phase and amplitude information of the sampled signal may be detected.
In some implementations, detection points are typically placed after the interference introduction point to ensure that the amplitude of the detected radio frequency interference signal is accurate. In some implementations, the detection circuit 240 may also be connected to an interference introduction point of the transmission circuit.
The processing circuit 250 has an input and an output. The input terminal is connected to the detection circuit 240 to receive the output signal of the detection circuit 240, and the output terminal is connected to the coupling point of the transmission circuit 230. The coupling point is located between the processor 220 and the detection point. The processing circuit 250 is configured to generate a cancellation signal according to the sampled signal, where the cancellation signal is used to couple with the radio frequency interference signal in the transmission circuit 230 at the coupling point. The amplitude of the cancellation signal is the same as the amplitude of the radio frequency interference signal, and the phase of the cancellation signal is opposite to the phase of the radio frequency interference signal.
Since the phase of the cancellation signal is opposite to the phase of the radio frequency interference signal, i.e. 180 degrees different, and the amplitude of the cancellation signal is the same as the amplitude of the radio frequency interference signal, the radio frequency interference signal component in the transmission circuit 230 can be greatly reduced, and the normal communication signal therein is retained.
In some implementations, the processing circuit 250 may include a phase shifter and a coupling element. The phase shifter is used to adjust the phase of the sampled signal and the coupling element is used to couple the cancellation signal to the signal in the transmission circuit 230. The signals in the transmission circuit 230 include normal communication signals between the application module 210 and the processor 220, as well as radio frequency interference signals. Among them, a phase shifter is a device capable of adjusting the phase of a wave.
The transmission medium typically introduces a phase shift to the fluctuations conducted therein. I.e. the radio frequency interference signal in the transmission circuit is transmitted from the interference introduction point to the coupling point, the phase of which may be changed. If the phase of the cancellation signal is not exactly processed, the phase difference from the radio frequency interference signal is not equal to 180 degrees, which may aggravate the interference or influence of the radio frequency interference signal.
In some implementations, the processing circuit 250 is configured to adjust the phase of the sampling signal according to a difference between the phase change of the radio frequency interference signal in the first path and the phase change of the sampling signal in the second path to ensure that the phase of the cancellation signal is opposite to the phase of the radio frequency interference signal. The first path is a path from the detection point to the coupling point in the transmission circuit 230, as shown by a solid line from the point a to the point B in fig. 2. The second path is a path from the detection point to the coupling point through the detection circuit 240 and the processing circuit 250, as shown by the dotted line from point a to point B in fig. 2. Thus, the phase processing of the offset signal is accurate, and the opposite phase of the radio frequency interference signal at the coupling point is ensured.
In some implementations, detection circuit 240 may include a sampling element for extracting a sampled signal at a detection point. The detection point may be located between an interference introduction point in the transmission circuit 230, where the transmission circuit 230 introduces a radio frequency interference signal, and the processor 220. The sampling element may be, for example, a coupler, which may extract the sampled signal at the detection point. The coupler may also be arranged to extract the sampled signal at the interference introduction.
In some implementations, the processing circuit 250 may also include a power amplifier. The power amplifier has an input end and an output end, the input end of the power amplifier is connected with the output end of the detection circuit 240, the output end of the power amplifier is connected with the phase shifter, and the power amplifier is used for amplifying the amplitude of the signal.
In some implementations, the sampling element may be a coupler, and the gain of the power amplifier is matched to the first loss in order to equalize the amplitude of the cancellation signal with the amplitude of the radio frequency interference signal. The first loss is the sum of the coupling coefficient of the coupler (sampling element), the coupling coefficient of the coupling element, and the path insertion loss between the coupler and the coupling element. The coupling coefficient is used to represent the degree of tightness of the coupling between the elements, for example, the ratio of the actual mutual inductance (absolute value) between the two inductive elements to the maximum limit value is defined as the coupling coefficient.
In some implementations, the detection circuit 240 and/or the processing circuit 250 are configured to detect that the application module 210 is put into operation when in an on state, which helps to avoid excessive power consumption.
In some implementations, the sampling element is a coupler and the coupling element is a coupler.
In some implementations, the application module 210 may be a camera module.
Although the influence factors of radio frequency interference are more, the interference path is complex, the user scene is various, the factors such as material aging caused by the use environment and the use time are not easy to find, and the reasons for generating interference are not easy to find. But the result of the interference is a radio frequency interference signal generated in the connection circuitry. In the embodiment of the application, the radio frequency interference signal in the connection circuit between the application module and the processor is sampled, and the offset signal is generated according to the sampled signal, and is coupled with the radio frequency interference signal at the coupling point. Because the amplitude of the counteraction signal is the same as that of the radio frequency interference signal, and the phase of the counteraction signal is opposite to that of the radio frequency interference signal, the radio frequency interference signal component in the transmission circuit can be greatly attenuated, and the normal communication signal in the transmission circuit is reserved. The method and the device are favorable for reducing radio frequency interference signals in the transmission circuit, improving the radio frequency interference resistance of data transmission between the application module and the processor and are wide in applicability.
The apparatus for data transmission according to the embodiments of the present application will be further described below with reference to some possible implementation manners of the embodiments of the present application.
Fig. 3 is a schematic diagram of one possible implementation of the apparatus of fig. 2. In the embodiment of fig. 3, the application module is a camera module, and by detecting the phase of the radio frequency interference signal in real time, reconstructing a cancellation signal with the same amplitude as the interference signal and 180 degrees phase difference, and performing interference cancellation, the situation that the camera signal is interfered by the high frequency noise of the antenna can be effectively improved. Specifically, as shown in fig. 3, the apparatus 300 for data transmission may include: the camera module 310, the processor 220, the connection circuit 230, the detection circuit 240 and the processing circuit 250.
The camera module 310 typically has a communication protocol interface, which may be, for example, a MIPI interface. The MIPI interface may be a DPHY communication protocol interface and/or a CPHY communication protocol interface.
The processor 220 has a communication protocol interface, which may be, for example, a MIPI interface.
The connection circuit 230 is used to connect the application module 210 with the processor 220. The connection circuit 230 is used to transmit communication signals between the application module 210 and the processor 220. In some implementations, an antenna for transceiving radio frequency signals is generally disposed around the camera module 310, which may interfere with the connection circuit 230. That is, the radio frequency interference signal is introduced into the interference introducing place of the transmission circuit, as shown in fig. 3, the point a of the transmission circuit is the interference introducing point. After the product structure, the application environment are determined, the introduction of disturbances to the transmission circuit is also generally determined.
In some implementations, the interference introduction of the transmission circuit may be determined by way of energy bin scanning. The interference introducing points are typically the strongest energy points of the radio frequency interference signals on the transmission circuit, and are typically located on the flexible printed circuit board (FPC) and connector of the camera module.
The detection circuit 240 may include a first coupler 241, a phase detection and compensation unit 242. The first coupler 241 is connected to the interference introducing point a, and is used for extracting a sampling signal of the radio frequency interference signal. The phase detecting and compensating unit 242 is connected to the first coupler 241 for detecting the phase of the sampling signal and compensating the phase.
In some embodiments, the detection point at which the first coupler 241 is placed is located after the interference introduction point, i.e. the first coupler 241 is located between the interference introduction point and the processor, to ensure that the detected interference signal amplitude is accurate. For example, the first coupler 241 needs to be placed between the connector and the processor of the System On Chip (SOC).
The processing circuit 250 is configured to generate a cancellation signal according to the sampled signal, where the cancellation signal is used to couple with the radio frequency interference signal in the transmission circuit 230 at the coupling point. The amplitude of the cancellation signal is the same as the amplitude of the radio frequency interference signal, and the phase of the cancellation signal is opposite to the phase of the radio frequency interference signal. As shown in fig. 3, the point B of the transmission circuit is a coupling point (coupling point).
The processing circuit 250 may include a power amplifier 251, a phase shifter 252, and a second coupler 253.
The power amplifier 251 has an input terminal and an output terminal, the input terminal of the power amplifier 251 is connected to the phase detection and compensation unit 242, the output terminal of the power amplifier 251 is connected to the phase shifter 252, and the power amplifier 251 is configured to amplify the amplitude of the signal. The frequency range of the power amplifier 251 should generally cover the frequency band (or antenna frequency band) of the interferer.
The phase shifter 252 is used to adjust the phase of the sampled signal and the second coupler 253 is used to couple the cancellation signal with the signal in the transmission circuit 230. The signals in the transmission circuit 230 include normal communication signals and radio frequency interference signals between the application module 210 and the processor 220.
The working principle of the embodiment of the application is as follows:
the radio frequency interference signal is introduced at the interference introduction point a of the connection circuit 230, the radio frequency interference signal is sampled by the first coupler 241, the extracted sampled signal is detected in phase in real time by the phase detection and compensation unit 242, and the phase control signal is output to the phase shifter 252. The sampled signal is amplified in amplitude by the power amplifier 251, phase-adjusted by the phase shifter 252, and then coupled to the signal line (near processor end) of the camera module by the second coupler 253, and a cancellation signal (or new interference signal) 180 degrees out of phase with the original radio frequency interference signal is reconstructed at the point B, and phase cancellation is performed with the original radio frequency interference signal, so as to solve the radio frequency interference problem.
In some embodiments, the coupling point B is located near the receiving end of the processor 220, which helps to reduce the added interference in signal transmission as much as possible.
In some implementations, to ensure that the magnitude of the reconstructed cancellation signal is equal to the magnitude of the radio frequency interference signal, the gain of the power amplifier 252 is matched to the first loss. The first loss is the sum of the coupling coefficient of the first coupler 241, the coupling coefficient of the second coupler 253, and the path insertion loss between the second coupler 241 and the second coupler 253.
The transmission medium typically introduces a phase shift to the fluctuations conducted therein. I.e. the radio frequency interference signal in the transmission circuit is transmitted from the interference introduction point to the coupling point, the phase of which may be changed. The phase change caused by the transmission of the original radio frequency interference signal from the interference introduction point a to the coupling point B is inconsistent with the phase change caused by the transmission of the reconstructed cancellation signal from the first coupler 241, via the detection circuit, to the second coupler 253.
Therefore, the phase control signal output by the detection circuit needs to compensate the phase difference of the two paths, so that the phase difference between the phase of the reconstructed interference signal at the coupling point B and the phase difference between the original radio frequency interference signal can be accurately controlled to be 180 degrees. The processing circuit 250 adjusts the phase of the sampled signal based on the phase difference between the first path and the second path so that the phase of the cancellation signal is opposite to the phase of the radio frequency interference signal. In other words, the processing circuit 250 adjusts the phase of the sampling signal according to the difference between the phase variation of the radio frequency interference signal in the first path and the phase variation of the sampling signal in the second path so that the phase of the cancellation signal is opposite to the phase of the radio frequency interference signal. The first path is a path from the interference introducing point (point a) to the coupling point B in the transmission circuit 230. The second path is a path from the point A of the interference introduction point to the coupling point B through the detection circuit 240 and the processing circuit 250. The method is favorable for accurately processing the phase of the offset signal and ensures that the phase of the offset signal is opposite to the phase of the radio frequency interference signal at the coupling point.
In some implementations, the detection circuit 240 and/or the processing circuit 250 are configured to detect that the application module 210 is put into operation when in an on state, which helps to avoid excessive power consumption sacrifice.
Because of more influence factors of radio frequency interference, the interference path is complex, the user scene is various, the use environment and other different factors, but the radio frequency interference results in the radio frequency interference signal in the connecting circuit. In the embodiment of the application, the radio frequency interference signal in the connection circuit between the application module and the processor is sampled, and the offset signal is generated according to the sampled signal, and is coupled with the radio frequency interference signal at the coupling point. Because the amplitude of the counteraction signal is the same as that of the radio frequency interference signal, and the phase of the counteraction signal is opposite to that of the radio frequency interference signal, the radio frequency interference signal component in the transmission circuit can be greatly attenuated, and the normal communication signal in the transmission circuit is reserved. The method and the device are favorable for reducing radio frequency interference signal components in the transmission circuit, improving the radio frequency interference resistance of data transmission between the application module and the processor and are wide in applicability.
Apparatus embodiments of the present application are described above in detail in connection with fig. 1-3, and method embodiments of the present application are described below in detail in connection with fig. 4. It is to be understood that the description of the method embodiments corresponds to the description of the device embodiments, and that parts not described in detail can therefore be seen in the preceding device embodiments.
Fig. 4 is a flowchart of a method for data transmission according to an embodiment of the present application. The method of data transmission according to the embodiments of the present application will be described in detail with reference to fig. 4, and the method may be applied to any of the above-described devices for data transmission. The apparatus for data transmission may include: an application module; the transmission circuit is connected with the application module and the processor and is used for transmitting communication signals between the application module and the processor, and radio frequency interference signals are introduced into the transmission circuit; the detection circuit is connected with the detection point in the transmission circuit and is used for detecting a sampling signal of the radio frequency interference signal; the processing circuit is provided with an input end and an output end, the input end is connected with the detection circuit, the output end is connected with a coupling point of the transmission circuit, and the coupling point is positioned between the processor and the detection point. As shown in fig. 4, the data transmission method may mainly include steps S410 to S430, and these steps are described in detail below.
It should be noted that, the sequence number of each step in the embodiment of the present application does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
In step S410, a sampling signal of the radio frequency interference signal is extracted, and information of the sampling signal is detected. The information of the sampled signal may include phase and amplitude information of the sampled signal.
In step S420, the sampled signal is processed to generate a cancellation signal. The amplitude of the cancellation signal is the same as the amplitude of the radio frequency interference signal, and the phase of the cancellation signal is opposite to the phase of the radio frequency interference signal.
In step S430, the cancellation signal is coupled to the radio frequency interference signal at the coupling point of the transmission circuit.
Optionally, the processing circuit comprises a phase shifter for adjusting the phase of the sampled signal and a coupling element for coupling the cancellation signal with the signal in the transmission circuit.
Optionally, the processing circuit is configured to adjust a phase of the sampling signal according to a difference between a phase variation of the radio frequency interference signal in the first path and a phase variation of the sampling signal in the second path, so that a phase of the cancellation signal is opposite to a phase of the radio frequency interference signal; the first path is a path from a detection point to a coupling point in the transmission circuit, and the second path is a path from the detection point to the coupling point through the detection circuit and the processing circuit.
Optionally, the detection circuit comprises a sampling element for extracting the sampled signal at the detection point. The detection point is located between an interference introduction point in the transmission circuit and the processor, and the transmission circuit introduces a radio frequency interference signal at the interference introduction point.
Optionally, the sampling element is a coupler, and the processing circuit further comprises a power amplifier. The input end of the power amplifier is connected with the output end of the detection circuit, the output end of the power amplifier is connected with the phase shifter, and the gain of the amplifier is matched with the first loss. The first loss is the sum of the coupling coefficient of the coupler, the coupling coefficient of the coupling element, and the path insertion loss between the coupler and the coupling element.
Optionally, the detection circuit and/or the processing circuit is configured to detect that the application module is put into an operating state when the application module is in an on state.
Optionally, the application module is a camera module.
In the embodiment of the application, the radio frequency interference signal in the connection circuit between the application module and the processor is sampled, and the offset signal is generated according to the sampled signal, and is coupled with the radio frequency interference signal at the coupling point. Because the amplitude of the counteraction signal is the same as that of the radio frequency interference signal, and the phase of the counteraction signal is opposite to that of the radio frequency interference signal, the radio frequency interference signal component in the transmission circuit can be greatly attenuated, and the normal communication signal in the transmission circuit is reserved. The method and the device are favorable for reducing radio frequency interference signal components in the transmission circuit, improving the radio frequency interference resistance of data transmission between the application module and the processor and are wide in applicability.
Fig. 5 is a schematic diagram of a component unit/a part of a component unit of an electronic device according to an embodiment of the present application. As shown in fig. 5, the electronic device 500 may comprise means 510 for data transmission as described in any of the foregoing.
The means 510 for data transmission may comprise a processor.
The processor is an operation and control core of the electronic equipment and is a final execution unit for information processing and program running. The processor may be a general-purpose processor including a central processor, a micro-control unit, a network processor, or other conventional processor. But may be a special purpose processor including a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.
Embodiments of the present application also provide a chip comprising a processor configured to perform a method as described in any of the preceding.
Embodiments of the present application also provide a non-transitory computer readable storage medium having stored thereon a computer program for performing a method as described in any of the foregoing.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present disclosure, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a machine-readable storage medium or transmitted from one machine-readable storage medium to another machine-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The machine-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. integrated with the available medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
It should be understood that, in various embodiments of the present application, "first," "second," etc. are used to distinguish between different objects, and not to describe a specific order, the size of the sequence numbers of each process described above does not mean that the order of execution should not be construed as to imply that the order of execution of each process should be determined by its function and inherent logic, but should not be construed as limiting the implementation of the embodiments of the present application.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
In several embodiments provided herein, it will be understood that when a portion is referred to as being "connected" or "connected" to another portion, it means that the portion can be "directly connected" or "electrically connected" while another element is interposed therebetween. In addition, the term "connected" also means that the portions are "physically connected" as well as "wirelessly connected". In addition, when a portion is referred to as "comprising" an element, it is meant that the portion may include the other element without excluding the other element, unless otherwise stated.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (10)

1. An apparatus for data transmission, comprising:
an application module;
the transmission circuit is connected with the application module and the processor and is used for transmitting communication signals between the application module and the processor, and radio frequency interference signals are introduced into the transmission circuit;
the detection circuit is connected with the detection point of the transmission circuit and is used for detecting the sampling signal of the radio frequency interference signal and the phase of the sampling signal;
the processing circuit is provided with an input end and an output end, the input end is connected with the detection circuit, the output end is connected with a coupling point of the transmission circuit, the processing circuit is used for generating a counteracting signal according to the sampling signal, the counteracting signal is used for coupling the coupling point with the radio frequency interference signal in the transmission circuit, the amplitude of the counteracting signal is identical to that of the radio frequency interference signal, the phase of the counteracting signal is opposite to that of the radio frequency interference signal, and the coupling point is positioned between the processor and the detection point.
2. The apparatus of claim 1, wherein the processing circuit comprises a phase shifter for adjusting the phase of the sampled signal and a coupling element for coupling the cancellation signal with the signal in the transmission circuit.
3. The apparatus of claim 2, wherein the processing circuit is configured to adjust the phase of the sampled signal such that the phase of the cancellation signal is opposite to the phase of the radio frequency interference signal based on a difference between the amount of phase change of the radio frequency interference signal in the first path and the amount of phase change of the sampled signal in the second path;
the first path is a path from the detection point to the coupling point in the transmission circuit, and the second path is a path from the detection point to the coupling point through the detection circuit and the processing circuit.
4. The apparatus of claim 2, wherein the detection circuit comprises a sampling element for extracting the sampled signal at the detection point, the detection point being located between an interference introduction of the transmission circuit, where the radio frequency interference signal is introduced, and the processor.
5. The apparatus of claim 4, wherein the sampling element is a coupler, the processing circuit further comprises a power amplifier, an input of the power amplifier is connected to an output of the detection circuit, an output of the power amplifier is connected to the phase shifter, and a gain of the amplifier is matched to a first loss, the first loss being a sum of a coupling coefficient of the coupler, a coupling coefficient of the coupling element, and a path insertion loss between the coupler and the coupling element.
6. The apparatus according to any of claims 1-5, wherein the detection circuit and/or the processing circuit is configured to be put into operation if the application module is detected to be in an on state.
7. The apparatus of any one of claims 1-5, wherein the application module is a camera module.
8. A method of processing an interfering signal, characterized by an apparatus for use in data transmission, the apparatus comprising:
an application module;
the transmission circuit is connected with the application module and the processor and is used for transmitting communication signals between the application module and the processor, and radio frequency interference signals are introduced into the transmission circuit;
the detection circuit is connected with the detection point of the transmission circuit and is used for detecting the sampling signal of the radio frequency interference signal;
the processing circuit is provided with an input end and an output end, the input end is connected with the detection circuit, the output end is connected with a coupling point of the transmission circuit, and the coupling point is positioned between the processor and the detection point;
the method comprises the following steps:
extracting a sampling signal of the radio frequency interference signal and detecting information of the sampling signal;
processing the sampling signal to generate a counteracting signal, wherein the amplitude of the counteracting signal is the same as that of the radio frequency interference signal, and the phase of the counteracting signal is opposite to that of the radio frequency interference signal;
and coupling the cancellation signal with the radio frequency interference signal at a coupling point of the transmission circuit.
9. An electronic device comprising the apparatus for data transmission according to any one of claims 1-7.
10. A non-transitory computer readable storage medium, having stored thereon a computer program for implementing the method of claim 8 when executed.
CN202311622952.2A 2023-11-29 2023-11-29 Data transmission device and method for processing interference signal Pending CN117560024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311622952.2A CN117560024A (en) 2023-11-29 2023-11-29 Data transmission device and method for processing interference signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311622952.2A CN117560024A (en) 2023-11-29 2023-11-29 Data transmission device and method for processing interference signal

Publications (1)

Publication Number Publication Date
CN117560024A true CN117560024A (en) 2024-02-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311622952.2A Pending CN117560024A (en) 2023-11-29 2023-11-29 Data transmission device and method for processing interference signal

Country Status (1)

Country Link
CN (1) CN117560024A (en)

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