Network topology transmission system shared by 100M 1553 and traditional 1553B buses and switching method

Abstract

The invention belongs to the field of communication, and discloses a 100M 1553 and traditional 1553B bus shared network topology transmission system and a switching method, and the transmission system comprises a 100M 1553 bus controller, a traditional 1553B bus controller, M 100M 1553 remote terminals, and N traditional 1553B remote terminals. The 100M 1553 bus controller is connected with the 1553B isolation transformer through the high-pass filter, the traditional 1553B master controller is connected with the branch cable through the 1553B isolation transformer, and the 100M 1553 remote terminal and the traditional 1553B remote terminal are connected with the trunk cable through the branch cable. Under the condition that only one bus controller exists in a network described in a traditional 1553B bus specification is not violated, the signal transmission requirements of the 100M 1553 bus and the traditional 1553B bus are met at the same time, self-adaptive switching of the 100M 1553 bus and the 1553B bus is supported, and the reliable signal transmission requirements of the 100M 1553 bus and the traditional 1553B bus are met.

Description

Technical Field

[0001] The present invention belongs to the field of communication technologies, and relates to a shared network topology transmission system and a switching method for a 100-Mbps 1553 and a traditional 1553B bus. Background Art

[0002] The traditional 1553B bus technology, based on a signal transmission mechanism of Manchester type II encoding, has long occupied an important position. With a data transmission rate of 1 Mbps, it has been verified through years of practice in military scenarios such as ground, aviation, and aerospace, and has built a mature and stable system architecture. With the continuous improvement of the information transmission rate, the 1-Mbps data transmission rate of the traditional 1553B bus gradually exposes a bandwidth bottleneck when facing new application scenarios such as massive data transmission and high-speed real-time control. Especially in scenarios such as multi-task collaborative operations in complex electromagnetic environments and high-precision sensor data fusion, the performance of the traditional 1553B bus has been difficult to meet the stringent requirements of the system for data transmission rate and real-time performance.

[0003] Compared with the Manchester type II time-domain encoding technology adopted by the traditional 1553B, the 100-Mbps 1553 bus technology performs signal frequency-domain modulation based on frequency-domain modulation technology and transmits signals using frequency-domain carriers. By introducing the frequency-domain modulation technology, the data transmission rate of the 1553B bus is increased from 1 Mbps to 100 Mbps, achieving a qualitative leap. It not only significantly enhances the data throughput capacity of the system, but also, on the premise of keeping the original network topology structure unchanged, improves the bandwidth utilization rate by transmitting signals using frequency-domain carriers. Moreover, without replacing basic components such as cables, couplers, and transformers, the 100-Mbps 1553 bus technology can make the most of existing resources and reduce the upgrade cost during equipment upgrade or deployment, providing an efficient solution for the modernization transformation of the traditional 1553B bus.

[0004] The 100-Mbps 1553 bus technology has significant advantages in performance, but due to the difference in spectral characteristics between it and the traditional 1553B bus, the traditional 1553B bus signal occupies a lower spectrum, while the 100-Mbps 1553 bus signal occupies a higher spectrum. When the 100-Mbps 1553 bus and the traditional 1553B bus share the same network topology components for signal transmission, the transmission bandwidth resources cannot be scientifically and reasonably allocated, and the two signals interfere with each other. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the present invention aims to provide a shared network topology transmission system and a switching method for a 100-Mbps 1553 and a traditional 1553B bus.

[0006] To achieve the above object, the present invention adopts the following technical solutions: The present invention provides a network topology transmission system for sharing a 100M 1553 and a traditional 1553B bus, including a 100M 1553 bus controller, a traditional 1553B bus controller, M 100M 1553 remote terminals, and N traditional 1553B remote terminals; the 100M 1553 bus controller is connected to a 1553B isolation transformer through a high-pass filter, the traditional 1553B bus controller is connected to a branch line cable through a 1553B isolation transformer, and the 100M 1553 remote terminals and the traditional 1553B remote terminals are connected to a main line cable through the branch line cable.

[0007] Further, the number of the M 100M 1553 remote terminals is less than or equal to 512, and the number of the N traditional 1553B remote terminals is less than or equal to 32.

[0008] The present invention also provides a method for switching the network topology of sharing a 100M 1553 and a traditional 1553B bus. Based on the above network topology transmission system for sharing a 100M 1553 and a traditional 1553B bus, the method includes the following steps: determining the cut-off frequency of the high-pass filter according to the transmission frequency of the 100M 1553 bus signal ; determining the value of the capacitor C according to the cut-off frequency of the high-pass filter ; determining the real part and the imaginary part of the total impedance of the high-pass filter based on the amplitude of the traditional 1553B bus signal transmission ; determining the inductor L according to the imaginary part of the total impedance of the high-pass filter .

[0009] Further, the high-pass filter is a filter with differential signal on both sides. Each side of the filter includes a resistor R and a capacitor C; the resistor R is connected in parallel with the inductor L to form a first parallel circuit, one end of the capacitor C is connected to the first parallel circuit, and the other end is connected to a terminal resistor.

[0010] Further, the total impedance of one side of the high-pass filter is:

[0011] wherein, is the impedance of the parallel connection of the terminal resistor and the capacitor C, and the is the impedance of the parallel connection of the inductor L and the resistor R.

[0012] Further, the impedance of the parallel connection of the terminal resistor and the capacitor C is:

[0013] wherein, is the impedance of the terminal resistor, is the impedance of the capacitor C.

[0014] Furthermore, the impedance of the capacitor C is:

[0015] wherein, is the imaginary unit, is the angular frequency of the traditional 1553B signal, is the capacitor.

[0016] Furthermore, the impedance of the parallel connection of the inductor L and the resistor R is:

[0017] wherein, is the imaginary unit, is the angular frequency of the traditional 1553B signal, is the inductor, is the resistor.

[0018] Furthermore, the cut-off frequency of the high-pass filter is:

[0019] wherein, is the resistor, is the impedance of the terminal resistor, is the capacitor.

[0020] Furthermore, the real part of the high-pass filter is:

[0021] The imaginary part of the high-pass filter is:

[0022] wherein, is the angular frequency of the traditional 1553B signal, is the inductor, is the resistor, is the impedance of the terminal resistor, is the capacitor.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention relates to a network topology transmission system that shares a 100M 1553 and a traditional 1553B bus. When there are a 100M 1553 bus controller, a traditional 1553B bus controller, a 100M 1553 remote terminal, and a traditional 1553B remote terminal in the network at the same time, the 100M 1553 bus controller and the traditional 1553B bus controller are integrated to ensure that there is only one bus controller node in the network after hybrid networking. Without violating the rule that there is only one bus controller in the network described in the traditional 1553B bus specification, the signal transmission requirements of both the 100M 1553 bus and the traditional 1553B bus are satisfied simultaneously.

[0024] The present invention relates to a method for switching the network topology that shares a 100M 1553 and a traditional 1553B bus, which is applicable to the application scenario of hybrid networking of a 100M 1553 bus and a traditional 1553B bus. Without replacing network topology components such as shielded twisted pair cables, isolation transformers, and coupling transformers in the traditional 1553B bus network topology, the function integration of the 100M 1553 bus controller can be achieved, supporting the adaptive switching between the 100M 1553 bus and the 1553B bus, and meeting the reliable transmission requirements of the signals of both the 100M 1553 bus and the traditional 1553B bus.

[0025] The present invention relates to a method for switching the network topology that shares a 100M 1553 and a traditional 1553B bus. By adjusting the capacitance value of capacitor C, the inductance of inductor L, the resistance value of resistor R, and the size of the terminal resistor the total impedance of the high-pass filter can be accurately regulated, thereby achieving precise filtering and transmission of input signals with different frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural diagram of a network topology transmission system that shares a 100M 1553 and a traditional 1553B bus according to the present invention; Figure 2 is a schematic structural diagram of the integration of a 100M 1553 bus controller and a traditional 1553B bus controller in an embodiment of the present invention; Figure 3 is a structural diagram of the connection between a 100M 1553 bus and a branch cable in an embodiment of the present invention; Figure 4 is a structural diagram of the connection between a traditional 1553B bus and a branch cable in an embodiment of the present invention; Figure 5 is a schematic internal connection diagram of a high-pass filter in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0028] Embodiment 1 The present invention provides a shared network topology transmission system for 100M 1553 and traditional 1553B buses, as Figure 1 shown, including: a 100M 1553 bus controller, a traditional 1553B bus controller, M 100M 1553 remote terminals, and N traditional 1553B remote terminals; the 100M 1553 bus controller is connected to a 1553B isolation transformer through a high-pass filter, and the traditional 1553B bus controller is connected to a branch line cable through a 1553B isolation transformer. It should be noted that in this embodiment, the branch line cable refers to the same branch line cable. In addition to using the same branch line cable to connect to the trunk cable, the 100M 1553 remote terminal and the traditional 1553B remote terminal can also use an independent branch line cable to connect to the trunk cable.

[0029] The 100M 1553 bus controller is connected to the secondary side of the 1553B isolation transformer near the branch line side through a high-pass filter, and the traditional 1553B bus controller is still connected to the branch line cable through the secondary side of the 1553B isolation transformer.

[0030] Specifically, this embodiment includes 1 100M 1553 bus controller, 1 traditional 1553B bus controller, M 100M 1553 remote terminals, and N traditional 1553B remote terminals. Among them, the 100M 1553 bus controller and the traditional 1553B bus controller can realize functional integration and share the branch line cable, and then connect to the trunk cable through the branch line cable via a traditional 1553B coupler. All M 100M 1553 remote terminals are connected to the trunk cable through the branch line cable via a traditional 1553B coupler, and all N traditional 1553B remote terminals are connected to the trunk cable through the branch line cable via a traditional 1553B coupler. As Figure 2 shown, both the traditional 1553B bus controller and the 100M 1553 bus controller transmit in a differential manner. The traditional 1553B bus controller is connected to the branch line cable using a 1553B isolation transformer, and the connection method is transformer coupling. The 100M 1553 bus controller is first connected in series with a high-pass filter, and then connected in parallel to the secondary side of the 1553B isolation transformer through a printed wire. In addition, the polarity of the differential signal of the high-pass filter is the same as the polarity of the traditional 1553B signal.

[0031] As Figure 3 shown, a shared network topology transmission system for 100M 1553 and traditional 1553B buses according to the present invention can realize the connection between a 100M 1553 bus controller or a 100M 1553B remote terminal and a high-pass filter. As Figure 4 shown, a traditional 1553B bus controller or a traditional 1553 remote terminal of the present invention still connects to a branch line cable through a traditional 1553B bus isolation transformer. After connecting the 100M 1553 bus controller to the high-pass filter, it is connected to the secondary side of the isolation transformer through a printed wire. On the one hand, the electrical isolation characteristic of the isolation transformer is utilized to effectively avoid possible electrical interference between different buses, ensuring that both bus signals can maintain a relatively independent and pure state before entering the high-pass filter; on the other hand, setting the connection point on the secondary side of the isolation transformer fully considers the impedance characteristics and signal transmission characteristics of the secondary side, enabling the subsequent high-pass filter to more accurately perform high-frequency screening and processing on the two bus signals according to these characteristics, providing an effective means for optimizing signal transmission and improving system performance in complex electronic systems in different fields, as Figure 2 shown.

[0032] In summary, a shared network topology transmission system for 100M 1553 and traditional 1553B buses according to the present invention uses traditional 1553B network topology components and networking architectures to solve the problem of node fusion networking of 100M 1553 and traditional 1553B buses, supports the adaptive switching between 100M 1553 and traditional 1553B buses, and ensures that the signal transmission reliability of the 100M 1553 bus and the traditional 1553B bus meets the reliability index requirements of the hybrid networking communication of the 100M 1553 bus and the traditional 1553B bus, effectively controlling the additional material costs for the upgrade of the traditional 1553B bus system or the construction of a new network.

[0033] Embodiment 2 The present invention provides a method for switching the network topology of a 100M 1553 and a traditional 1553B bus, including the following steps: determining the cut-off frequency of the high-pass filter according to the transmission frequency of the 100M 1553 bus signal ; determining the value of capacitor C according to the cut-off frequency of the high-pass filter ; determining the real part and the imaginary part of the total impedance of the high-pass filter based on the amplitude of the traditional 1553B bus signal transmission; determining inductor L according to the imaginary part of the total impedance of the high-pass filter ; The impedance of the terminal resistor of the traditional 1553B bus network is

[0034] , and since the traditional 1553B network topology components and network architectures are used, the impedance of the terminal resistor remains unchanged, and the angular frequency of the traditional 1553B signal is also ​Using Manchester II encoding, then is 1 MHz, and the corresponding angular frequency is . Since the 100 Mbps 1553 and the traditional 1553B need to adjust the capacitance C, resistance R, and inductance L in the high-pass filter to achieve branch cable sharing, the resistance R and the inductance L are connected in parallel to form a first parallel circuit, and then the capacitance C is connected in series with the first parallel circuit. Among them, the parallel connection of the resistance R and the inductance L is used for the high-frequency signal path and low-frequency impedance improvement, and forms a high-pass filtering characteristic when connected in series with the capacitance C.

[0035] It should be noted that since the 100 Mbps 1553 and the traditional 1553B bus sharing network topology transmission system transmit differential signals, the high-pass filter is a filter on both sides of the differential signal, and each side of the filter includes a resistance R and a capacitance C.

[0036] The high-pass filter is a filter on both sides of the differential signal, and each side of the filter includes a resistance R and a capacitance C; the resistance R and the inductance L are connected in parallel to form a first parallel circuit, one end of the capacitance C is connected to the first parallel circuit, and the other end is connected to the terminal resistance.

[0037] Specifically, as Figure 5 shown, the high-pass filter adopts a symmetric structure, and each side includes a resistance R, an inductance L, and a capacitance C. One end of the two resistances R is grounded, and the other ends are respectively connected in parallel with the inductance L to obtain a first parallel circuit. One end of the two capacitances C is connected to the first parallel circuit, and the other end is connected to the terminal resistance to obtain the high-pass filter.

[0038] If is the input signal frequency, then the impedance of the capacitance C is:

[0039] Among them, is the imaginary unit, is the angular frequency of the traditional 1553B signal, is the capacitance.

[0040] The capacitance C, as an energy storage element in the circuit, is determined according to the above formula. is the imaginary unit, introducing the concept of the complex number domain, enabling us to more comprehensively describe the reactance behavior of the capacitance under alternating current signals. As the angular frequency of the traditional 1553B signal, it is closely related to the signal frequency , converting the actual signal frequency into a more general angular frequency form in circuit analysis, and the magnitude of the capacitance C directly affects the amplitude of its reactance.

[0041] The impedance of the parallel connection of the inductance L and the resistance R is also the impedance of the first parallel circuit is:

[0042] Wherein, is the imaginary unit, is the angular frequency of the traditional 1553B signal, is the inductance, is the resistance.

[0043] The resistance R makes the first parallel circuit have both reactance components and resistance components at different frequencies. It can be clearly seen from the above formula that as the angular frequency changes, the relative proportion of the reactance of the inductance L and the resistance R will be dynamically adjusted, thereby affecting the impedance of the entire parallel circuit. This characteristic is crucial in a high-pass filter, and it works together with the capacitor C to accurately filter signals of different frequencies to ensure that the design objectives of the high-pass filter are met.

[0044] The impedance of the capacitor in parallel with the terminal resistance is :

[0045] Wherein, is the impedance of the terminal resistance, is the impedance of the capacitor C.

[0046] The terminal resistance often plays a role in impedance matching and signal stabilization in the circuit. After it is connected in parallel with the capacitor C, it combines the reactance characteristics of the capacitor and the stable characteristics of the resistance.

[0047] In summary, the total impedance of the high-pass filter on one side is: =

[0048] Wherein, is the impedance of the terminal resistance connected in parallel with the capacitor C, and the is the impedance of the parallel connection of the inductance L and the resistance R.

[0049] By adjusting the parameter values of each component, such as changing the capacitance value of the capacitor C, the inductance of the inductance L, the resistance value of the resistance R, and the magnitude of the terminal resistance , the total impedance of the high-pass filter can be accurately controlled, thereby achieving precise filtering and transmission of input signals of different frequencies.

[0050] The real part of the high-pass filter is is:

[0051] Imaginary part of the high-pass filter is:

[0052] wherein, is the angular frequency of the traditional 1553B signal, is the inductor, is the resistor, is the impedance of the terminal resistor, is the capacitor.

[0053] The real part of the high-pass filter reflects the characteristics related to the resistor during the signal transmission process of the high-pass filter, that is, one of the influencing factors for signal reflection. When the secondary side of the 1553B isolation transformer presents a relatively high impedance, the smaller the real part of the high-pass filter, the more obvious the signal reflection. Reasonably adjusting them can effectively control the degree of signal reflection and ensure the stability of signal transmission.

[0054] The imaginary part of the high-pass filter reflects the influence of the high-pass filter on the phase of the 1553B signal. The larger the imaginary part value, the greater the phase influence. By finely adjusting the inductor , resistor and capacitor parameters, the phase change can be controlled within an acceptably small range to ensure the accuracy of signal transmission.

[0055] Before determining the capacitor C, resistor R and inductor L in the high-pass filter, first analyze the cut-off frequency of the high-pass filter, requiring that the cut-off frequency of the high-pass filter not only meets the transmission frequency requirements of the hundred-megabit 1553 bus signal, but also effectively filters the 1553 bus signal. The resistor R can be measured on the functional side of the hundred-megabit 1553 bus. Therefore, according to the transmission bandwidth requirement above 1 MHz, the capacitor C can be determined.

[0056] The real part of the high-pass filter can reflect the reflection characteristics of the high-pass filter on the 1553B signal. Since the secondary side of the 1553B isolation transformer usually has a relatively high impedance, the smaller the real part of the high-pass filter, the more obvious the signal reflection. The imaginary part of the high-pass filter can reflect the influence of the high-pass filter on the phase of the 1553B signal. The larger the value of the imaginary part of the high-pass filter, the greater the phase influence.

[0057] Therefore, when determining the parameters of the high-pass filter, first determine the , the inductance L is determined according to the imaginary part of the high-pass filter. On the one hand, the high-pass filter should accurately and efficiently filter out various unwanted clutter and interference components in the 1553 bus signal, ensuring that the "pure" signal current flows on the transmission line and providing a high-fidelity data basis for subsequent system processing. On the other hand, it must meet the strict impedance matching conditions required for the reliable transmission of 1553 signals, ensuring that the signal will not encounter "traffic accidents" such as reflection and attenuation caused by impedance mutation when passing through this key node of the filter, so that it can reach the destination intact.

[0058] In summary, under the condition of meeting the requirements of filtering the 1553 bus signal, the high-pass filter also meets the impedance matching requirements for the reliable transmission of 1553 signals, and finally determines the capacitance C, resistance R, and inductance L of the high-pass filter.

[0059] The present invention does not need to replace key network topology components such as shielded twisted pair cables, isolation transformers, and coupling transformers in the traditional 1553B bus network topology. These components have been well integrated with surrounding equipment in long-term flight practice and can continue to "escort" the system stability. According to real-time mission requirements, it flexibly supports the adaptive switching between the 100M 1553 bus and the 1553B bus. In conventional stages such as takeoff and cruise, rely on the traditional 1553B bus to ensure the safe transmission of basic data; when facing high-speed transmission requirements such as emergency image backhaul and sudden intensive parameter analysis, instantly switch to the 100M 1553 bus to fully meet the rate requirements and comprehensively ensure the reliable transmission requirements of the 100M 1553 bus and the traditional 1553B bus signals, laying a solid foundation for the safe and efficient flight of the aircraft.

[0060] In the integrated networking application of the 100M 1553 bus and the traditional 1553B bus of the present invention, the independent functional nodes of the 100M 1553 bus and the independent functional nodes of the traditional 1553B bus can be integrated at the board level using the method proposed in the present invention to achieve miniaturization, and the two different independent nodes can also achieve functional integration through simple line connections without re-designing the integration node. When integrating the 100M 1553 bus and the traditional 1553B bus for networking, the parameters of the high-pass filter used for the 100M 1553 bus to access the network can be estimated according to the expected indicators, so that after the 100M 1553 bus branch accesses the network, the traditional 1553B bus signal will not be affected by problems such as impedance mismatch and phase deviation, resulting in a decrease in signal quality; for the 100M 1553 bus, the transmission bandwidth of the high-pass filter must meet the transmission requirements of the 100M 1553 bus signal, and the cut-off frequency should be greater than the highest frequency of the transmission retention bandwidth of the traditional 1553B bus signal.

[0061] By adopting the method for switching the network topologies shared by the 100M 1553 and the traditional 1553B bus of the present invention, the functional integration of the 100M 1553 bus and the traditional 1553B bus nodes can be simplified, and the hybrid networking of the 100M 1553 bus and the traditional 1553B bus can be realized in a low-cost manner. On the premise of using the traditional 1553B network topology components and network architecture, the performance of the traditional 1553B bus network system can be greatly improved.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A 100M 1553 and traditional 1553B bus shared network topology transmission system, characterized in that: include: 100M 1553 bus controller, traditional 1553B bus controller, M 100M 1553 remote terminals, N traditional 1553B remote terminals; The 100M 1553 bus controller is connected to the 1553B isolation transformer through a high-pass filter, the traditional 1553B master controller is connected to the branch line cable through a 1553B isolation transformer, and the 100M 1553 remote terminal and the traditional 1553B remote terminal are connected to the trunk cable through the branch line cable.

2. The 100M 1553 and traditional 1553B bus shared network topology transmission system according to claim 1 is characterized in that: The number of the M 100M 1553 remote terminals is less than or equal to 512, and the number of the N traditional 1553B remote terminals is less than or equal to 32.

3. A method for switching a 100M 1553 bus shared network topology and a traditional 1553B bus shared network topology, based on the 100M 1553 bus shared network topology transmission system according to any one of claims 1-2, comprising the following steps: Determine the cutoff frequency of the high-pass filter based on the transmission frequency of the 100M 1553 bus signal ; According to the cutoff frequency of the high-pass filter Determine the value of capacitance C; Determine the total impedance of the high-pass filter based on the amplitude of the traditional 1553B bus signal transmission The real and imaginary parts of According to the total impedance of the high-pass filter The imaginary part determines the inductance L.

4. The method for switching the network topology between 100M 1553 and traditional 1553B bus sharing according to claim 3 is characterized in that: The high-pass filter is a filter on both sides of the differential signal, and each side of the filter includes a resistor R and a capacitor C; The resistor R and the inductor L are connected in parallel to form a first parallel circuit. One end of the capacitor C is connected to the first parallel circuit, and the other end is connected to the terminal resistor.

5. The method for switching the network topology between 100M 1553 and traditional 1553B bus sharing according to claim 3 is characterized in that: The total impedance of the high-pass filter on one side is for: in, Terminal resistance The impedance in parallel with the capacitor C is is the impedance of the inductor L and the resistor R in parallel.

6. The method for switching the network topology between 100M 1553 and traditional 1553B bus sharing according to claim 5 is characterized in that: The terminal resistance The impedance in parallel with the capacitor C for: in, is the impedance of the terminal resistor, is the impedance of capacitor C.

7. The method for switching the network topology between 100M 1553 and traditional 1553B bus sharing according to claim 6 is characterized in that: The impedance of the capacitor C for: in, is an imaginary unit, is the angular frequency of the traditional 1553B signal, For capacitance.

8. The method for switching the network topology between 100M 1553 and traditional 1553B bus sharing according to claim 5 is characterized in that: The impedance of the inductor L and resistor R in parallel for: in, is an imaginary unit, is the angular frequency of the traditional 1553B signal, is the inductor, For resistance.

9. The method for switching the network topology between 100M 1553 and traditional 1553B bus sharing according to claim 3 is characterized in that: The cutoff frequency of the high-pass filter for: in, is the resistance, is the impedance of the terminal resistor, For capacitance.

10. The method for switching the network topology between 100M 1553 and traditional 1553B bus sharing according to claim 3 is characterized in that: The real part of the high-pass filter for: The imaginary part of the high-pass filter for: in, is the angular frequency of the traditional 1553B signal, is the inductor, is the resistance, is the impedance of the terminal resistor, For capacitance.

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