Interference signal cancellation method, apparatus, system, device, medium and airborne terminal

Abstract

The application discloses a communication transceiver interference signal elimination method, device, system, electronic equipment, readable storage medium and airborne terminal. The method comprises the following steps: determining the minimum isolation degree between a navigation receiving channel and a communication transmitting channel based on the expected power of the interference signal in advance; when a maintenance instruction is received, starting a communication transceiver baseband module, and sending a received training sequence to the communication transceiver baseband module; sending the baseband modulation signal and the navigation modulation signal output by the communication transceiver baseband module to a computer, and determining filter parameters according to the baseband modulation signal and the navigation modulation signal; injecting the obtained filter parameters into a target filter, and starting the target filter to perform self-interference suppression on the communication transmitting signal of the communication transceiver. The application can improve the interference isolation degree of the receiving and transmitting channels and reduce the interference of the communication transceiver on the navigation positioning receiver without increasing the size of the equipment.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method, apparatus, system, electronic device, readable storage medium, and airborne terminal for eliminating interference signals in a communication transceiver. Background Technology

[0002] As equipment becomes increasingly miniaturized and micro-sized, flight equipment also faces user demands for lighter, smaller, and thinner devices. When communication transceivers are integrated with navigation modules, such as BeiDou or GPS positioning modules, the integrated transceivers and navigation modules are subject to interference in the transmission and reception channels and out-of-band radiation due to the miniaturization requirements. This interference can affect the aircraft's navigation and positioning receiver, which is detrimental to safe flight.

[0003] To ensure safe flight, related technologies employ self-interference suppression techniques to improve the anti-interference performance of communication transceivers. While this self-interference suppression technology can improve the interference isolation of the transceiver channel and enhance flight safety, it cannot simultaneously meet the requirements of miniaturized integration and optimized design of the equipment.

[0004] Therefore, how to improve the interference isolation of the transceiver channel and reduce the interference of the communication transceiver to the navigation and positioning receiver without increasing the size of the equipment, especially the multi-band integrated antenna for communication and navigation, is a technical problem that needs to be solved by the technical personnel in this field. Summary of the Invention

[0005] This application provides a method, apparatus, system, electronic device, readable storage medium, and airborne terminal for eliminating interference signals from a communication transceiver. Without increasing the size of the equipment, especially the multi-band integrated antenna for communication and navigation, it can also improve the interference isolation of the transceiver channel and reduce the interference of the communication transceiver to the navigation and positioning receiver.

[0006] To address the aforementioned technical problems, the embodiments of the present invention provide the following technical solutions:

[0007] One embodiment of the present invention provides a method for eliminating interference signals in a communication transceiver, comprising:

[0008] The minimum isolation between the navigation receiving channel and the communication transmitting channel is determined in advance based on the expected power of the interference signal.

[0009] Upon receiving a maintenance command, the baseband module of the communication transceiver is activated, and the received training sequence is sent to the baseband module of the communication transceiver.

[0010] The baseband modulation signal and navigation modulation signal output by the baseband module of the communication transceiver are collected and sent to the computer so that the computer can determine the filter parameters based on the baseband modulation signal and the navigation modulation signal; the obtained filter parameters are injected into the target filter and the target filter is turned on to suppress self-interference of the communication transmission signal of the communication transceiver.

[0011] Optionally, after determining the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal, the method further includes:

[0012] Performance degradation conditions are determined in advance based on the power values ​​of navigation signals and interference signals arriving at the navigation intermediate frequency processing module, the average flight level protection level, and the initial average level protection level.

[0013] The average current flight level protection level is determined based on all flight level protection level values ​​prior to the current moment.

[0014] If the average current flight level protection level meets the performance degradation condition, a suspected equipment failure command is generated.

[0015] Optionally, after generating the suspected device malfunction command, the method further includes:

[0016] The equipment damage detection conditions are determined in advance based on the power values ​​of navigation signals and interference signals arriving at the navigation intermediate frequency processing module, the average value of static horizontal protection level, and the initial value of the average horizontal protection level.

[0017] The static horizontal protection level values ​​are statistically analyzed over a preset time period after the aircraft docks, and the average static horizontal protection level is obtained.

[0018] If the average value of the current static horizontal protection level meets the equipment damage detection conditions, then an equipment damage command is generated.

[0019] Optionally, determining the filter parameters based on the baseband modulation signal and the navigation modulation signal includes:

[0020] The baseband modulation signal is the digital intermediate frequency signal d(n) output by the baseband module of the communication transceiver, and the navigation modulation signal is the digital intermediate frequency signal q(n) output by the navigation receiving channel through the navigation radio frequency processing module.

[0021] The filter parameter s(n) is determined by minimizing the parameter calculation relationship, which is ||d(n)*s(n)-q(n)||.

[0022] Optionally, determining the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal includes:

[0023] Based on the power A of the navigation signal and the interference signal arriving at the radio frequency processing module in the navigation system as specified in DO-229E, the expected power of the interference signal is determined to be AB.

[0024] Based on the expected power of the interference signal and the suppression degree C of the interference signal generated by the target filter, the maximum power A-B+CD of the communication transmission signal reaching the radio frequency processing module in the navigation is determined.

[0025] Based on the maximum input power of the analog-to-digital converter, the desired interference signal power caused by the communication transmission of the analog-to-digital converter is determined to be 10log. 10 (10 ((PADC-D) / 10) -10 (A / 10) );

[0026] The minimum isolation is determined based on the maximum power of the signal and the power of the interference signal.

[0027] Another aspect of the present invention provides a communication transceiver interference signal cancellation device, comprising:

[0028] An isolation determination module is used to pre-determine the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal;

[0029] The filter parameter determination module is used to, upon receiving a maintenance command, activate the baseband module of the communication transceiver and send the received training sequence to the baseband module; and send the collected baseband modulation signal and navigation modulation signal output by the baseband module to a computer so that the computer can determine the filter parameters based on the baseband modulation signal and the navigation modulation signal. The self-interference suppression module is used to inject the acquired filter parameters into the target filter and activate the target filter to suppress self-interference in the communication transmission signal of the communication transceiver.

[0030] This invention also provides an electronic device, including a processor, which executes a computer program stored in a memory to implement the steps of the communication transceiver interference signal cancellation method as described in any of the preceding claims.

[0031] Finally, this embodiment of the invention also provides a readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the communication transceiver interference signal cancellation method as described in any of the preceding claims.

[0032] This invention also provides an airborne terminal, which is installed in an aircraft and includes the electronic equipment described above.

[0033] Finally, this invention also provides a communication transceiver interference signal cancellation system, including a computer, an antenna, and an airborne terminal as described above;

[0034] The computer is used to send maintenance instructions and training sequences to the airborne terminal, and to calculate the filter parameters of the airborne terminal based on the baseband modulation signal and navigation modulation signal fed back by the airborne terminal.

[0035] The antenna includes a navigation receiving antenna and a communication transceiver antenna; wherein the navigation receiving antenna and the communication transceiver antenna are integrated into one unit, or the distance between the navigation receiving antenna and the communication transceiver antenna is less than or equal to a preset distance threshold.

[0036] The advantages of the technical solution provided in this application are that, through self-interference suppression, the isolation between the communication transceiver transmitting and navigation receiving channels can be effectively improved. While ensuring minimum isolation, the power of the communication transceiver signal reaching the navigation receiver is appropriately increased, reducing the expected power of interference signals. This reduces the size of the integrated communication transceiver and navigation equipment, and also reduces the spatial distance between the internal communication and navigation channels of the antenna. Sufficient cavity filter volume is provided for the communication transceiver transmitter, effectively improving interference to other electromagnetic wave equipment on the aircraft, while significantly reducing the size of the antenna module. Thus, without increasing the equipment size, the interference isolation between the transmitting and receiving channels is improved, and the interference of the communication transceiver to the navigation and positioning receiver is reduced.

[0037] Furthermore, embodiments of the present invention also provide corresponding implementation devices, systems, electronic devices, readable storage media, and airborne terminals for the method of eliminating interference signals in communication transceivers, further making the method more practical. The devices, systems, electronic devices, readable storage media, and airborne terminals have corresponding advantages.

[0038] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 A flowchart illustrating a method for eliminating interference signals in a communication transceiver, provided in an embodiment of the present invention;

[0041] Figure 2 A structural diagram of a specific embodiment of the communication transceiver interference signal cancellation device provided in this invention;

[0042] Figure 3 A structural diagram of a specific embodiment of the electronic device provided in this invention;

[0043] Figure 4 A structural diagram of a specific embodiment of the communication transceiver interference signal cancellation system provided in this invention;

[0044] Figure 5 This is a schematic diagram of an exemplary application scenario of the communication transceiver interference signal cancellation system provided in an embodiment of the present invention. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] The terms "first," "second," "third," "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units not listed.

[0047] After introducing the technical solutions of the embodiments of the present invention, the various non-limiting embodiments of this application will be described in detail below.

[0048] First see Figure 1 , Figure 1 This is a flowchart illustrating a method for eliminating interference signals in a communication transceiver according to an embodiment of the present invention. The embodiment of the present invention may include the following:

[0049] S101: Determine the minimum isolation between the navigation receiving channel and the communication transmitting channel in advance based on the expected power of the interference signal.

[0050] In this step, the navigation receiving channel refers to the channel in the antenna that transmits the signal transmitted by the navigation antenna element to the navigation signal processing module of the airborne terminal. The communication transmitting channel refers to the channel that transmits the signal from the communication transceiver of the airborne terminal to the communication transmitting antenna element in the antenna. The communication receiving channel refers to the channel in the antenna that transmits the signal transmitted by the communication receiving antenna element to the communication transceiver of the airborne terminal. The communication receiving channel and the communication transmitting channel of the communication transceiver are relatively far apart in frequency and do not require special channel isolation design; the navigation receiving channel and the communication transmitting channel are closer in frequency, so the higher the channel isolation after self-interference suppression, the better. The desired interference signal power refers to the power of the interference signal caused by the communication transmission that the user desires.

[0051] S102: When a maintenance command is received, the baseband module of the communication transceiver is turned on, and the received training sequence is sent to the baseband module of the communication transceiver.

[0052] In this embodiment, the communication transceiver is located in the airborne terminal. The airborne terminal has two modes: operating mode and maintenance mode. In operating mode, the baseband module of the communication transceiver, which performs modulation and demodulation processing of the baseband signal, is not controlled by maintenance commands. In maintenance mode, the baseband module of the communication transceiver is activated after receiving a maintenance command. The maintenance command in this step is used to trigger the airborne terminal to enter maintenance mode. The training sequence is sent by the user to the baseband module of the communication transceiver through a host computer or a computer for channel estimation during communication. Any existing method can be used to generate the training sequence, and this application does not impose any limitations on it.

[0053] S103: The baseband modulation signal and navigation modulation signal output by the baseband module of the communication transceiver are sent to the computer so that the computer can determine the filter parameters based on the baseband modulation signal and navigation modulation signal.

[0054] The filter parameters in this embodiment refer to the parameters of filters in airborne terminals, such as FIR filters (Finite Impulse Response).

[0055] S104: Inject the acquired filter parameters into the target filter and turn on the target filter to suppress self-interference of the communication transmission signal of the communication transceiver.

[0056] In this embodiment, the target filter is a parameter-configurable filter. The target filter can be any type of filter, which does not affect the implementation of this application. In the previous step, after the computer calculates the filter parameters, it sends these parameters to the airborne terminal. The airborne terminal then sends these parameters back to the filter, which operates based on these parameters and suppresses self-interference in the communication transmission signal of the transceiver.

[0057] In the technical solution provided by this invention, self-interference suppression can effectively improve the isolation between the communication transceiver's transmitting and navigation receiving channels. While ensuring minimum isolation, it appropriately increases the power of the communication transceiver signal reaching the navigation receiver, reducing the expected power of interference signals. This reduces the size of the integrated communication transceiver and navigation equipment, and also reduces the spatial distance between the internal communication and navigation channels of the antenna. Sufficient cavity filter volume is provided for the communication transceiver's transmitting end, effectively improving interference to other electromagnetic wave equipment on the aircraft, while significantly reducing the size of the antenna module. Thus, without increasing the equipment size, it improves the interference isolation of the transmitting and receiving channels and reduces interference from the communication transceiver to the navigation and positioning receiver.

[0058] It should be noted that there is no strict order of execution for the steps in this application. As long as they conform to a logical order, these steps can be executed simultaneously or in a certain preset order. Figure 1 This is just an illustrative example and does not mean that this is the only possible execution order.

[0059] Based on the above embodiments, in order to improve the stability of the airborne terminal, this embodiment can also perform aging monitoring on the airborne terminal, which may include the following:

[0060] The performance degradation conditions are determined in advance based on the power values ​​of navigation signals and interference signals arriving at the navigation intermediate frequency processing module, the average flight level protection level, and the initial value of the average level protection level. The current average flight level protection level is determined based on all flight level protection level values ​​before the current moment. If the current average flight level protection level meets the performance degradation conditions, a suspected equipment fault command is generated.

[0061] In this embodiment, the flight level protection level is a value periodically output by the navigation calculation module of the airborne terminal. The average flight level protection level is the average value of the flight level protection level over a statistical period. The initial value of the average level protection level refers to the average flight level protection level when the performance of the airborne terminal has not degraded, or the average flight level protection level over a statistical period when the terminal is first installed. The performance degradation condition can be determined according to the actual situation. For example, a threshold value for the average flight level protection level can be preset. If the current average flight level protection level is greater than the threshold value, it indicates that the performance degradation condition is met; if the current average flight level protection level is not greater than the threshold value, it indicates that the performance degradation condition is not met.

[0062] Furthermore, to improve the user experience and enhance the performance of the airborne terminal, after generating a suspected device malfunction command, the following may also be included:

[0063] The equipment damage detection conditions are determined in advance based on the power values ​​of navigation signals and interference signals arriving at the navigation intermediate frequency processing module, the average static level protection level, and the initial value of the average level protection level. The static level protection level values ​​within a preset time period after the aircraft docks are statistically analyzed to obtain the current average static level protection level. If the current average static level protection level meets the equipment damage detection conditions, an equipment damage command is generated.

[0064] In this embodiment, the equipment damage detection conditions and preset time periods can be flexibly determined according to the actual application scenario, which does not affect the implementation of this application.

[0065] In the above embodiments, there is no limitation on how to perform step S103. This embodiment provides an optional implementation method for determining filter parameters based on the baseband modulation signal and the navigation modulation signal, which may include the following steps:

[0066] The baseband modulation signal is the digital intermediate frequency signal d(n) output by the baseband module of the communication transceiver, and the navigation modulation signal is the digital intermediate frequency signal q(n) output by the navigation receiving channel through the radio frequency processing module in the navigation. The filter parameter s(n) can be determined by minimizing the parameter calculation relationship, which is ||d(n)*s(n)-q(n)||.

[0067] In the above embodiments, there is no limitation on how to perform step S101. This embodiment also provides an optional implementation method for determining the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal, which may include:

[0068] Based on the power A of the navigation signal and the interference signal arriving at the radio frequency processing module in the navigation system as specified in DO-229E, the expected power of the interference signal is determined to be AB.

[0069] Based on the expected power of the interference signal and the suppression degree C of the interference signal generated by the target filter, determine the maximum power A-B+CD of the communication transmission signal reaching the radio frequency processing module in the navigation.

[0070] Based on the maximum input power of the analog-to-digital converter, the desired interference signal power caused by communication transmission from the analog-to-digital converter is determined to be 10log. 10 (10 ((PADC-D) / 10) -10 (A / 10) );

[0071] The minimum isolation is determined based on the maximum power of the signal and the power of the interfering signal.

[0072] In this embodiment, self-interference suppression is employed, aiming for a moderate isolation between the navigation receiving channel and the communication transceiver transmitting channel. By appropriately reducing the isolation between the navigation receiving channel and the communication transceiver transmitting channel, the device size can be reduced. The minimum isolation must meet the following two conditions:

[0073] Assuming all GNSS navigation signals (such as BeiDou or GPS) and interference signals specified in DO-229E reach the RF processing module in the navigation system with a power of A dBm (decibel relative to one milliwatt), this power can be calculated by adding the power at the antenna aperture to the RF design. The desired power of the interference signal is B dB less than A, where B is a positive number. AB represents the desired power of the interference signal. The value of B is related to the self-interference suppression level. For example, if the desired residual interference power after self-interference suppression is E (4 dB less than the low noise level), then, while ensuring the residual interference power level, if the maximum self-interference power that the current system can suppress is F, then B ≤ F, and generally, the larger the better. The FIR filter's suppression degree for interference signals generated by communication transmission is C dB. Therefore, the maximum power of the communication transmission signal reaching the navigation receiving intermediate frequency (IF) is A - B + CD dBm, where D is the design margin, the value of which can be flexibly determined according to the actual application scenario, generally taken as 3-5 dB. The maximum input power of an ADC (Analog to Digital Converter) is P. ADC dBm, then the expected interference signal power caused by the ADC's communication transmission is 10log 10 (10 ((PADC-D) / 10) -10 (A / 10) The isolation between communication transmission and navigation reception channels can be improved by suppressing self-interference. The larger the B value, the smaller the requirement for channel isolation. By increasing B, the spatial distance between the communication transmission and navigation channels inside the antenna can be reduced.

[0074] This invention also provides a corresponding apparatus for the method of eliminating interference signals in communication transceivers, further enhancing the practicality of the method. The apparatus can be described from both a functional module perspective and a hardware perspective. The following describes the communication transceiver interference signal elimination apparatus provided by this invention. The communication transceiver interference signal elimination apparatus described below can be referred to in conjunction with the communication transceiver interference signal elimination method described above.

[0075] From the perspective of functional modules, see Figure 2 , Figure 2 This is a structural diagram of a communication transceiver interference signal cancellation device provided in an embodiment of the present invention, wherein the device may include:

[0076] Isolation determination module 201 is used to pre-determine the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal.

[0077] The filter parameter determination module 202 is used to, upon receiving a maintenance command, activate the baseband module of the communication transceiver and send the received training sequence to the baseband module; it also sends the acquired baseband modulation signal and navigation modulation signal output by the baseband module to the computer, so that the computer can determine the filter parameters based on the baseband modulation signal and navigation modulation signal. The self-interference suppression module 203 is used to inject the acquired filter parameters into the target filter and activate the target filter to suppress self-interference in the communication transmission signal of the communication transceiver.

[0078] Optionally, in some embodiments of this example, the above-mentioned device may further include a fault command generation module, which is used to determine the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal, and to pre-determine the performance degradation conditions based on the power values ​​of the navigation signal and the interference signal arriving at the navigation intermediate frequency processing module, the average flight level protection level, and the initial value of the average level protection level; to determine the current average flight level protection level based on all flight level protection level values ​​before the current time; and to generate a suspected equipment fault command if the current average flight level protection level meets the performance degradation conditions.

[0079] Optionally, in some other embodiments of this example, the above-mentioned device may further include an equipment damage command generation module, which is used to pre-determine equipment damage detection conditions based on the power values ​​of navigation signals and interference signals arriving at the navigation intermediate frequency processing module, the average static level protection level, and the initial value of the average level protection level; statistically analyze the static level protection level values ​​within a preset time period after the aircraft docks to obtain the current average static level protection level; and generate an equipment damage command if the current average static level protection level meets the equipment damage detection conditions.

[0080] As an optional implementation of the above embodiments, the filter parameter determination module 202 can also be used for: the baseband modulation signal is the digital intermediate frequency signal d(n) output by the baseband module of the communication transceiver, and the navigation modulation signal is the digital intermediate frequency signal q(n) output by the navigation receiving channel through the navigation radio frequency processing module; the filter parameter s(n) is determined by minimizing the parameter calculation relationship, and the parameter calculation relationship is ||d(n)*s(n)-q(n)||.

[0081] As another optional implementation of the above embodiments, the isolation determination module 201 can also be used to: determine the expected power of the interference signal as AB based on the power A of the interference signal reaching the radio frequency processing module in the navigation according to the navigation signal and the interference signal specified in DO-229E; determine the maximum power A-B+CD of the communication transmission signal reaching the radio frequency processing module in the navigation according to the expected power of the interference signal and the suppression degree C of the interference signal formed by the target filter on the communication transmission; and determine the expected power of the interference signal caused by the communication transmission to reach the analog-to-digital converter as 10log based on the maximum input power of the analog-to-digital converter. 10 (10 ((PADC-D) / 10) -10 (A / 10) The minimum isolation is determined based on the maximum power of the signal and the power of the interfering signal.

[0082] The functions of each module of the communication transceiver interference signal cancellation device in this embodiment of the invention can be specifically implemented according to the methods in the above method embodiments. The specific implementation process can be referred to the relevant descriptions in the above method embodiments, which will not be repeated here.

[0083] As can be seen from the above, the embodiments of the present invention can improve the interference isolation of the transceiver channel and reduce the interference of the communication transceiver to the navigation and positioning receiver without increasing the size of the device.

[0084] The communication transceiver interference signal cancellation device mentioned above is described from the perspective of functional modules. Furthermore, this application also provides an electronic device, which is described from the perspective of hardware. Figure 3 This is a schematic diagram of the structure of the electronic device provided in one embodiment of this application. For example... Figure 3 As shown, the electronic device includes a memory 30 for storing a computer program; and a processor 31 for executing the computer program to implement the steps of the communication transceiver interference signal cancellation method mentioned in any of the above embodiments.

[0085] The processor 31 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 31 may also be a controller, microcontroller, microprocessor, or other data processing chip. The processor 31 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 31 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 31 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 31 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0086] The memory 30 may include one or more computer-readable storage media, which may be non-transitory. The memory 30 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the memory 30 may be an internal storage unit of an electronic device, such as a server hard drive. In other embodiments, the memory 30 may be an external storage device of an electronic device, such as a plug-in hard drive on a server, a smart media card (SMC), a secure digital card (SD), a flash card, etc. Furthermore, the memory 30 may include both internal and external storage units of the electronic device. The memory 30 can be used not only to store application software and various types of data installed on the electronic device, such as code for programs executing vulnerability handling methods, but also to temporarily store data that has been output or will be output. In this embodiment, the memory 30 is used to store at least the following computer program 301, which, after being loaded and executed by the processor 31, is capable of implementing the relevant steps of the communication transceiver interference signal cancellation method disclosed in any of the foregoing embodiments. In addition, the resources stored in memory 30 may also include operating system 302 and data 303, and the storage method may be temporary storage or permanent storage. Operating system 302 may include Windows, Unix, Linux, etc. Data 303 may include, but is not limited to, data corresponding to the results of interference signal cancellation of the communication transceiver.

[0087] In some embodiments, the aforementioned electronic device may further include a display screen 32, an input / output interface 33, a communication interface 34 (or network interface), a power supply 35, and a communication bus 36. The display screen 32 and input / output interface 33, such as a keyboard, are user interfaces; optional user interfaces may also include standard wired interfaces, wireless interfaces, etc. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a display screen or display unit, used to display information processed in the electronic device and to display a visual user interface. The communication interface 34 may optionally include a wired interface and / or a wireless interface, such as a Wi-Fi interface, a Bluetooth interface, etc., typically used to establish communication connections between the electronic device and other electronic devices. The communication bus 36 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. This bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0088] Those skilled in the art will understand that Figure 3 The structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, such as sensors 37 that perform various functions.

[0089] The functions of each functional module of the electronic device in the embodiments of the present invention can be specifically implemented according to the methods in the above method embodiments. The specific implementation process can be referred to the relevant descriptions in the above method embodiments, which will not be repeated here.

[0090] As can be seen from the above, the embodiments of the present invention can improve the interference isolation of the transceiver channel and reduce the interference of the communication transceiver to the navigation and positioning receiver without increasing the size of the device.

[0091] It is understood that if the communication transceiver interference signal cancellation method in the above embodiments is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods in the various embodiments of this application. The aforementioned storage medium includes: USB flash drive, mobile hard disk, read-only memory (ROM), random access memory (RAM), electrically erasable programmable ROM, register, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, removable disk, CD-ROM, magnetic disk or optical disk, and other media capable of storing program code.

[0092] Based on this, embodiments of the present invention also provide a readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the steps of the communication transceiver interference signal elimination method of any of the above embodiments are as follows.

[0093] In addition, this application also provides an airborne terminal, which is installed in an aircraft and includes the electronic equipment described in the above embodiments.

[0094] Furthermore, embodiments of the present invention also provide a communication transceiver interference signal cancellation system, see [link to relevant documentation]. Figure 4 It may include:

[0095] The communication transceiver interference signal cancellation system may include a computer 401, an antenna 402, and an airborne terminal 403; the computer 401 is used to send maintenance instructions and training sequences to the airborne terminal 403, and to calculate the filter parameters of the airborne terminal 403 based on the baseband modulation signal and navigation modulation signal fed back by the airborne terminal 403; the antenna 402 may include a navigation receiving antenna and a communication transceiver antenna; wherein, the navigation receiving antenna and the communication transceiver antenna are integrated or the spacing is less than or equal to a preset distance threshold.

[0096] In this embodiment, the navigation receiving antenna and the communication transceiver antenna can be independent antennas or integrated antennas. The technical solution provided in this application is applicable to integrated antennas and situations where the navigation receiving antenna and the communication transceiver antenna are within a certain distance dd. If the communication transceiver is a Beidou short message service and is installed on the back of the aircraft, dd is generally 10 meters.

[0097] The functions of each module of the communication transceiver interference signal cancellation system in this embodiment of the invention can be specifically implemented according to the methods in the above method embodiments. The specific implementation process can be referred to the relevant descriptions in the above method embodiments, which will not be repeated here.

[0098] As can be seen from the above, the embodiments of the present invention can improve the interference isolation of the transceiver channel and reduce the interference of the communication transceiver to the navigation and positioning receiver without increasing the size of the device.

[0099] To enable those skilled in the art to more clearly understand the technical solution of this application, this application also incorporates... Figure 5 An illustrative example is given, which may include the following:

[0100] A communication transceiver interference cancellation system may include a computer, an antenna, and an airborne terminal. The airborne terminal may include a navigation performance monitoring module, a navigation calculation module, an ADC, a navigation RF processing module, a communication transceiver RF processing module, an FIR filter, a self-interference suppression module, and a maintenance control module. The antenna includes a navigation antenna element, a communication transmitting antenna element, a communication receiving antenna element, a cavity filter, a navigation receiving channel, a communication transmitting channel, and a communication receiving channel. The navigation performance monitoring module is used for aging monitoring. The navigation calculation module is used for synchronizing and demodulating navigation signals, and outputting positioning information, timing information, and level protection level values. The navigation RF processing module processes navigation signal data transmitted by the navigation antenna element, and the communication transceiver RF processing module processes data transmitted to the communication transmitting antenna element and data transmitted by the communication receiving antenna element. The FIR filter is used for self-interference suppression. The cavity filter is an industry-specific device and belongs to the category of mechanical filters. The baseband module of the communication transceiver completes the modulation and demodulation processing of the baseband signal; the maintenance control module mainly completes communication with the computer, receives control commands from the computer, and completes data exchange. The airborne terminal has operating modes and maintenance modes. In operating mode, the baseband module of the communication transceiver is not affected by the maintenance module; in maintenance mode, the baseband module is activated by the maintenance control module. The workflow of the communication transceiver interference signal cancellation system may include:

[0101] A1: The computer controls the maintenance module, activates the baseband module of the communication transceiver, and sends the training sequence;

[0102] A2: The maintenance control module collects the digital intermediate frequency signal d(n) output by the baseband module of the communication transceiver and the digital intermediate frequency signal q(n) output by the navigation channel after passing through the RF processing module, and transmits the signal to the computer;

[0103] A3: The computer calculates to minimize ||d(n)*s(n)-q(n)||, obtains the FIR filter parameter s(n), and sends the FIR filter parameter s(n) to the maintenance control module.

[0104] A4: The self-interference suppression module obtains the FIR filter parameter s(n) from the maintenance control module and injects the parameter into the FIR filter;

[0105] A5: Enable FIR filter;

[0106] A6: The navigation calculation module will output this value periodically. The navigation performance monitoring module will calculate the average value based on this value. The navigation performance monitoring module will monitor the average value of the calculation level protection level and obtain the record as Lm when it was first installed.

[0107] A7: The navigation performance monitoring module continuously monitors this value and records it as Bm. If BL>A, the maintenance control module notifies the ground operation system that maintenance is required.

[0108] A8: After the aircraft docks, repeat steps A6 and A7, and continuously monitor the average horizontal protection level, recording it as Cm. If CL > A / 10, the equipment's self-interference suppression is working normally. Otherwise, the equipment is considered damaged.

[0109] As can be seen from the above, if the communication transceiver interference digital cancellation function can be integrated into the GPS or Beidou positioning digital module in this embodiment, the channel isolation between the communication transceiver transmission and GPS or Beidou positioning reception can be effectively improved, the spatial distance between the transmission and reception channels can be reduced, sufficient cavity filter volume can be reserved for the communication transceiver transmitter, the interference to other electromagnetic wave equipment of the aircraft can be effectively reduced, and the size of the antenna module can be significantly reduced.

[0110] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the hardware disclosed in the embodiments, including devices and electronic equipment, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0111] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0112] The foregoing has provided a detailed description of a method, apparatus, system, electronic device, readable storage medium, and airborne terminal for eliminating interference signals in a communication transceiver. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of these embodiments are merely illustrative of the method and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from the principles of the invention, and these improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A method for eliminating interference signals in a communication transceiver, characterized in that, include: The minimum isolation between the navigation receiving channel and the communication transmitting channel is determined in advance based on the expected power of the interference signal. Upon receiving a maintenance command, the baseband module of the communication transceiver is activated, and the received training sequence is sent to the baseband module of the communication transceiver. The training sequence is sent by the user to the baseband module of the communication transceiver via a computer and is used for channel estimation during the communication process. The baseband modulation signal and navigation modulation signal output by the baseband module of the communication transceiver are collected and sent to the computer so that the computer can determine the filter parameters based on the baseband modulation signal and the navigation modulation signal; the obtained filter parameters are injected into the target filter and the target filter is turned on to suppress self-interference of the communication transmission signal of the communication transceiver. Among them, determining the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal includes: Based on the power A of the navigation signal and the interference signal reaching the radio frequency processing module in the navigation system as specified in DO-229E, the expected power of the interference signal is determined to be AB; based on the expected power of the interference signal and the suppression degree C of the interference signal generated by the target filter for the communication transmission, the maximum power of the communication transmission signal reaching the radio frequency processing module in the navigation system is determined to be A-B+CD; based on the maximum input power of the analog-to-digital converter, the expected power of the interference signal caused by the communication transmission reaching the analog-to-digital converter is determined to be... The minimum isolation is determined based on the maximum power of the signal and the power of the interference signal; where B is a positive value related to the self-interference suppression level, and D is the design margin. This represents the maximum input power of the ADC. The process of determining filter parameters based on the baseband modulation signal and the navigation modulation signal includes: the baseband modulation signal being a digital intermediate frequency signal output by the baseband module of the communication transceiver. The navigation modulation signal is a digital intermediate frequency signal output by the navigation receiving channel through the navigation radio frequency processing module. The filter parameters are determined by minimizing the parameter calculation relationship. The parameter calculation formula is as follows: .

2. The method for eliminating interference signals in a communication transceiver according to claim 1, characterized in that, After determining the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal in advance, the method further includes: Performance degradation conditions are determined in advance based on the power values ​​of navigation signals and interference signals arriving at the navigation intermediate frequency processing module, the average flight level protection level, and the initial average level protection level. The average current flight level protection level is determined based on all flight level protection level values ​​prior to the current moment. If the average current flight level protection level meets the performance degradation condition, a suspected equipment failure command is generated.

3. The method for eliminating interference signals in a communication transceiver according to claim 2, characterized in that, Following the generation of the suspected device malfunction command, the following is also included: The equipment damage detection conditions are determined in advance based on the power values ​​of navigation signals and interference signals arriving at the navigation intermediate frequency processing module, the average value of static horizontal protection level, and the initial value of the average horizontal protection level. The static horizontal protection level values ​​are statistically analyzed over a preset time period after the aircraft docks, and the average static horizontal protection level is obtained. If the average value of the current static horizontal protection level meets the equipment damage detection conditions, then an equipment damage command is generated.

4. A communication transceiver interference signal cancellation device, characterized in that, include: An isolation determination module is used to pre-determine the minimum isolation between the navigation receiving channel and the communication transmitting channel based on the expected power of the interference signal; The filter parameter determination module is used to activate the baseband module of the communication transceiver when a maintenance command is received, and to send the received training sequence to the baseband module of the communication transceiver. The baseband modulation signal and navigation modulation signal output by the baseband module of the communication transceiver are collected and sent to the computer so that the computer can determine the filter parameters based on the baseband modulation signal and the navigation modulation signal. The self-interference suppression module is used to inject the acquired filter parameters into the target filter and turn on the target filter to suppress self-interference in the communication transmission signal of the communication transceiver; the training sequence is sent by the user to the baseband module of the communication transceiver via a computer for channel estimation during the communication process. The filter parameter determination module is further configured to: determine the expected power of the interference signal as AB based on the power A of the interference signal reaching the radio frequency processing module in the navigation system as specified in DO-229E; determine the maximum power of the communication transmission signal reaching the radio frequency processing module in the navigation system as A-B+CD based on the expected power of the interference signal and the suppression degree C of the interference signal generated by the communication transmission by the target filter; and determine the expected power of the interference signal caused by the communication transmission reaching the analog-to-digital converter as... The minimum isolation is determined based on the maximum power of the signal and the power of the interference signal; where B is a positive value related to the self-interference suppression level, and D is the design margin. This represents the maximum input power of the ADC. The filter parameter determination module is further configured to: the baseband modulation signal is a digital intermediate frequency signal output by the baseband module of the communication transceiver. The navigation modulation signal is a digital intermediate frequency signal output by the navigation receiving channel through the navigation radio frequency processing module. The filter parameters are determined by minimizing the parameter calculation relationship. The parameter calculation formula is as follows: .

5. An electronic device, characterized in that, It includes a processor and a memory, wherein the processor is used to execute a computer program stored in the memory to implement the steps of the communication transceiver interference signal cancellation method as described in any one of claims 1 to 3.

6. A readable storage medium, characterized in that, The readable storage medium stores a computer program that, when executed by a processor, implements the steps of the communication transceiver interference signal cancellation method as described in any one of claims 1 to 3.

7. An airborne terminal, characterized in that, The airborne terminal is installed in the aircraft and includes the electronic equipment as described in claim 5.

8. A communication transceiver interference signal cancellation system, characterized in that, Includes a computer, an antenna, and the airborne terminal as described in claim 7; The computer is used to send maintenance instructions and training sequences to the airborne terminal, and to calculate the filter parameters of the airborne terminal based on the baseband modulation signal and navigation modulation signal fed back by the airborne terminal. The antenna includes a navigation receiving antenna and a communication transceiver antenna; wherein the navigation receiving antenna and the communication transceiver antenna are integrated into one unit, or the distance between the navigation receiving antenna and the communication transceiver antenna is less than or equal to a preset distance threshold.

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