Microstrip line signal far-end crosstalk evaluation method, device and equipment and storage medium

Abstract

The invention discloses a far-end crosstalk evaluation method, device and equipment for a microstrip line signal and a storage medium. The method comprises the following steps: decomposing a signal with the amplitude of A at an attacker sending end into a first step signal and a second step signal with the amplitude of A / 2, and decomposing a static signal with the amplitude of 0 at a victim sending end into a third step signal with the amplitude of A / 2 and a fourth step signal with the amplitude of-A / 2, synthesizing the first step signal and the fourth step signal into a differential signal, synthesizing the second step signal and the third step signal into a common-mode signal, acquiring a first response of the differential signal at the receiving end of the victim, and acquiring a second response of the common-mode signal at the receiving end of the victim, and based on the first response and the second response, obtaining the far-end crosstalk of the attacker to the victim, and through signal decomposition and superposition operation, improving the evaluation speed of the far-end crosstalk on the basis of keeping high evaluation accuracy, and well meeting the needs in practical application.

Description

Technical Field

[0001] The present application relates to the field of signal processing technology, and in particular to a far-end crosstalk evaluation method, device, equipment and storage medium for microstrip line signals. Background Art

[0002] As digital data rates continue to increase and signal bandwidths increase, crosstalk from adjacent signals at the receiver becomes a serious challenge in signal integrity design for high data rate interfaces. Crosstalk is caused by coupling between two signal lines, mutual inductance and mutual capacitance between signals. When a signal propagates on a transmission line, the mutual coupling of electromagnetic fields between adjacent signal lines will generate undesirable noise voltage signals, that is, energy is coupled from one line to another.

[0003] There are two types of crosstalk. The first type is near-end crosstalk (NEXT), sometimes called backward crosstalk (or "coupling" in the analog RF field). NEXT is the voltage measured on the victim trace close to the transmitter side. The second type is far-end crosstalk (FEXT), sometimes called forward crosstalk (or "isolation" in the analog RF field). Far-end crosstalk (FEXT) refers to the interference phenomenon caused by the signal at the transmitting end leaking to the receiving end signal line of the adjacent signal line through electromagnetic induction or capacitive coupling during signal transmission.

[0004] Therefore, evaluating far-end crosstalk is extremely important for modern high-speed communication systems. The evaluation speed of far-end crosstalk in related technologies is not high enough to meet the needs of practical applications.

[0005] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0006] The purpose of the present application is to provide a method, device, equipment and storage medium for evaluating far-end crosstalk of microstrip line signals. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0007] According to one aspect of an embodiment of the present application, a method for acquiring far-end crosstalk of a microstrip line signal is provided, comprising:

[0008] Decompose the signal with amplitude A sent by the attacker into a first step signal and a second step signal with amplitude A / 2;

[0009] Decomposing the stationary signal with an amplitude of 0 at the victim transmitting end into a third step signal with an amplitude of A / 2 and a fourth step signal with an amplitude of -A / 2;

[0010] synthesizing the first step signal and the fourth step signal into a differential signal;

[0011] synthesizing the second step signal and the third step signal into a common mode signal;

[0012] Obtaining a first response of the differential signal at the victim receiving end, and obtaining a second response of the common mode signal at the victim receiving end;

[0013] Based on the first response and the second response, the far-end crosstalk of the attacker to the victim is obtained.

[0014] In some embodiments of the present application, the first response includes a first amplitude of a differential signal received by the victim receiving end, and the second response includes a second amplitude of a common-mode signal received by the victim receiving end;

[0015] The obtaining, based on the first response and the second response, the far-end crosstalk of the attacker to the victim includes:

[0016] The first amplitude and the second amplitude are superimposed to obtain the far-end crosstalk of the attacker to the victim.

[0017] In some embodiments of the present application, the first response further includes a first time taken for the differential signal to be transmitted from a transmitting end of the differential signal to a receiving end of the differential signal, and the second response further includes a second time taken for the common mode signal to be transmitted from a transmitting end of the common mode signal to a receiving end of the common mode signal;

[0018] The acquiring the far-end crosstalk of the attacker to the victim based on the first response and the second response further includes:

[0019] Acquire a time difference between the differential signal and the common mode signal arriving at the victim receiving end according to the first time and the second time;

[0020] The relationship between the voltage and time of the far-end crosstalk is determined according to the time difference and the rising edge time of the signal received by the victim receiving end.

[0021] In some embodiments of the present application, determining the relationship between the voltage and time of the far-end crosstalk according to the time difference and the rising edge time of the signal received by the victim receiving end includes:

[0022] In the case where the time difference is greater than or equal to the rising edge time, the voltage of the far-end crosstalk starts to drop from zero volts at a first time on the time axis, reaches a saturation value at the sum of the first time and the rising edge time on the time axis, the saturation value is the second amplitude, starts to rise at a second time on the time axis, and returns to zero at the sum of the rising edge time and the second time;

[0023] The peak duration of the far-end crosstalk voltage on the time axis is the difference between the time difference and the rising edge time.

[0024] In some embodiments of the present application, determining the relationship between the voltage and time of the far-end crosstalk according to the time difference and the rising edge time of the signal received by the victim receiving end includes:

[0025] In the case where the time difference is less than the rising edge time, the voltage of the far-end crosstalk starts to drop from zero volts at a first time on the time axis, reaches a peak value at a second time on the time axis, starts to rise at the sum of the first time on the time axis and the rising edge time, and returns to zero at the sum of the rising edge time and the second time;

[0026] The peak duration of the far-end crosstalk voltage on the time axis is the difference between the rising edge time and the time difference.

[0027] In some embodiments of the present application, obtaining a first response of the differential signal at the victim receiving end includes:

[0028] Obtain the equivalent relative dielectric constant of the differential signal line pair according to the thickness, line width, line spacing and height of the microstrip signal line;

[0029] Obtaining the propagation speed of the differential signal according to the propagation speed of the electromagnetic wave in the air and the equivalent relative dielectric constant of the differential signal line pair;

[0030] Acquiring a first time of the differential signal according to a propagation speed and a length of a microstrip signal line;

[0031] The amplitude of the differential signal received by the victim receiving end is obtained according to the amplitude of the differential signal and the attenuation of the channel.

[0032] In some embodiments of the present application, the propagation speed of the differential signal is the ratio of the propagation speed of the electromagnetic wave in the air to the arithmetic square root of the equivalent relative dielectric constant of the differential signal line pair;

[0033] The first time of the differential signal is the ratio of the length of the microstrip signal line to the propagation speed;

[0034] The amplitude of the differential signal received by the victim receiving end is the product of the amplitude of the differential signal and the attenuation of the channel.

[0035] In some embodiments of the present application, obtaining a second response of the common mode signal at the victim receiving end includes:

[0036] According to the thickness, line width, line spacing and height of the microstrip signal line, the equivalent relative dielectric constant of the common mode signal line pair is obtained;

[0037] The propagation speed of the common mode signal is obtained according to the propagation speed of the electromagnetic wave in the air and the equivalent relative dielectric constant of the common mode signal line pair.

[0038] Acquire a second time of the common mode signal according to the propagation speed and the length of the microstrip signal line;

[0039] The amplitude of the common mode signal received by the victim receiving end is obtained according to the amplitude of the common mode signal and the attenuation of the channel.

[0040] In some embodiments of the present application, the propagation speed of the common mode signal is the ratio of the propagation speed of the electromagnetic wave in the air to the arithmetic square root of the equivalent relative dielectric constant of the common mode signal line pair;

[0041] The second time of the common mode signal is the ratio of the length of the microstrip signal line to the propagation speed;

[0042] The amplitude of the common mode signal received by the victim receiving end is the product of the amplitude of the common mode signal and the attenuation of the channel.

[0043] According to another aspect of an embodiment of the present application, a device for acquiring far-end crosstalk of a microstrip line signal is provided, comprising:

[0044] A first decomposition module is used to decompose the signal with amplitude A from the attacker's sending end into a first step signal and a second step signal with amplitudes A / 2;

[0045] A second decomposition module is used to decompose the static signal with an amplitude of 0 from the victim transmitting end into a third step signal with an amplitude of A / 2 and a fourth step signal with an amplitude of -A / 2;

[0046] A first synthesis module, used for synthesizing the first step signal and the fourth step signal into a differential signal;

[0047] A second synthesis module, used for synthesizing the second step signal and the third step signal into a common mode signal;

[0048] A response acquisition module, configured to acquire a first response of the differential signal at the victim receiving end, and to acquire a second response of the common mode signal at the victim receiving end;

[0049] The far-end crosstalk acquisition module is used to acquire the far-end crosstalk of the attacker to the victim based on the first response and the second response.

[0050] According to another aspect of an embodiment of the present application, an electronic device is provided, characterized in that it includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the far-end crosstalk evaluation method for microstrip line signals described in any embodiment of the present application.

[0051] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program is executed by a processor to implement the far-end crosstalk evaluation method for a microstrip line signal described in any embodiment of the present application.

[0052] The technical solution provided by one aspect of the embodiments of the present application may have the following beneficial effects:

[0053] The far-end crosstalk acquisition method of a microstrip line signal provided in an embodiment of the present application decomposes a signal with an amplitude of A at the attacker's transmitting end into a first step signal and a second step signal with an amplitude of A / 2, decomposes a stationary signal with an amplitude of 0 at the victim's transmitting end into a third step signal with an amplitude of A / 2 and a fourth step signal with an amplitude of -A / 2, synthesizes the first step signal and the fourth step signal into a differential signal, synthesizes the second step signal and the third step signal into a common-mode signal, obtains a first response of the differential signal at the victim's receiving end, and obtains a second response of the common-mode signal at the victim's receiving end, obtains the far-end crosstalk of the attacker to the victim based on the first response and the second response, and improves the evaluation speed of the far-end crosstalk while maintaining a high evaluation accuracy through signal decomposition and superposition operations, which can better meet the needs in practical applications.

[0054] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 It is a flow chart of a method for obtaining far-end crosstalk of a microstrip line signal according to an embodiment of the present application.

[0057] Figure 2 This is a schematic diagram of the generation principle of near-end crosstalk and far-end crosstalk.

[0058] Figure 3 It is a schematic diagram of the microstrip line structure and field distribution of an embodiment of the present application.

[0059] Figure 4 It is a schematic diagram of the structure of multiple microstrip lines according to an embodiment of the present application.

[0060] Figure 5 It is a schematic diagram of differential signals of a microstrip line according to an embodiment of the present application.

[0061] Figure 6 It is a schematic diagram of the electromagnetic field distribution of a differential signal according to an embodiment of the present application.

[0062] Figure 7 This is a schematic diagram of a common-mode signal of a microstrip line according to an embodiment of the present application.

[0063] Figure 8 It is a schematic diagram of the electromagnetic field distribution of a common mode signal according to an embodiment of the present application.

[0064] Fig. 9 This is a curve diagram of a differential signal received by a victim receiving end according to an embodiment of the present application.

[0065] Fig.10 This is a graph of the common-mode signal received by the victim receiving end of one embodiment of the present application.

[0066] Fig.11 It is a decomposition diagram of the differential signal and the common mode signal received by the victim receiving end when ΔT≥Tr in one embodiment of the present application.

[0067] Fig.12 It is a superposition diagram of the differential signal and the common mode signal received by the victim receiving end when ΔT≥Tr in one embodiment of the present application, that is, far-end crosstalk.

[0068] Fig.13It is a decomposition diagram of differential signals and common-mode signals received by the victim receiver when ΔT < Tr in an embodiment of the present application.

[0069] Fig.14 It is a superposition diagram of differential signals and common-mode signals received by the victim receiver when ΔT < Tr in an embodiment of the present application, that is, far-end crosstalk.

[0070] Fig.15 It is a structural block diagram of a device for obtaining far-end crosstalk of microstrip line signals in an embodiment of the present application.

[0071] Fig.16 It is a structural block diagram of an electronic device in an embodiment of the present application.

[0072] Fig.17 It is a schematic diagram of a computer-readable storage medium in an embodiment of the present application. Detailed implementation manners

[0073] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0074] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless specifically defined as here.

[0075] A microstrip line is a transmission line used to transmit signals in high-speed and high-frequency circuits. It is realized by printing a conductor line on a dielectric board (usually a partition board). In the structure of a microstrip line, the dielectric between the central conductor line and the ground plane is called "microstrip", so it is named microstrip line. A microstrip line can also be called a microstrip signal line.

[0076] Crosstalk will occur when a microstrip line transmits signals. Crosstalk is caused by the coupling between two signal lines, the mutual inductance and mutual capacitance between signals. The signal that generates crosstalk is called an aggressor or an active line, while the signal that is interfered is called a victim or a passive line.

[0077] The impact of FEXT on communication systems is mainly reflected in the following aspects: signal distortion: FEXT will cause signal distortion, making it impossible for the receiver to correctly identify the information sent by the transmitter; data loss: severe FEXT may cause data loss, affecting the reliability and stability of the communication system; transmission rate reduction: FEXT will increase the bit error rate of signal transmission, thereby reducing the data transmission rate. Therefore, evaluating FEXT is extremely important for modern high-speed communication systems. The evaluation speed of FEXT in related technologies is not high enough to meet the needs of practical applications.

[0078] In response to the problems existing in the related art, an embodiment of the present application provides a method for obtaining far-end crosstalk of a microstrip line signal, which decomposes a signal with an amplitude of A at the attacker's transmitting end into a first step signal and a second step signal with an amplitude of A / 2, decomposes a stationary signal with an amplitude of 0 at the victim's transmitting end into a third step signal with an amplitude of A / 2 and a fourth step signal with an amplitude of -A / 2, synthesizes the first step signal and the fourth step signal into a differential signal, synthesizes the second step signal and the third step signal into a common-mode signal, obtains a first response of the differential signal at the victim's receiving end, and obtains a second response of the common-mode signal at the victim's receiving end, obtains the far-end crosstalk of the attacker to the victim based on the first response and the second response, and improves the evaluation speed of the far-end crosstalk while maintaining a high evaluation accuracy through signal decomposition and superposition operations, which can better meet the needs in practical applications.

[0079] A method for acquiring far-end crosstalk of a microstrip line signal proposed according to an embodiment of the present application is described below in conjunction with the accompanying drawings.

[0080] refer to Figure 1 As shown, an embodiment of the present application provides a method for obtaining far-end crosstalk of a microstrip line signal, which may include steps S10-S60:

[0081] S10, decomposing the signal with amplitude A from the attacker's sending end into a first step signal and a second step signal both with amplitude A / 2.

[0082] like Figure 2 As shown in the figure, assuming that the victim N is in a stationary state, when the transmitting end Vx of the attacker M sends a signal with an amplitude of A, the near-end voltage Vy of the victim is the near-end crosstalk, and the far-end voltage Vt of the victim is the far-end crosstalk. The signal with an amplitude of A sent by the transmitting end Vx of the attacker M is decomposed into two step signals with an amplitude of A / 2, and the sum of the two step signals is the original attack signal with an amplitude of A.

[0083] like Figure 3 and Figure 4As shown in the figure, there is an open space above the high-speed printed conductor, and the medium is air. Below the high-speed printed conductor is a dielectric board (circuit board or package substrate), and the medium is a dielectric material. The bottom of the dielectric board is a benign electrical conductor plane, which is the reference plane of the high-speed signal conductor.

[0084] S20, decomposing the static signal with an amplitude of 0 at the victim transmitting end into a third step signal with an amplitude of A / 2 and a fourth step signal with an amplitude of -A / 2.

[0085] For example, a stationary signal with an amplitude of 0 at the transmitting end Vy of the victim N is decomposed into a step signal with an amplitude of A / 2 and a step signal with an amplitude of -A / 2, and the sum of the two signals is still 0.

[0086] S30: synthesize the first step signal and the fourth step signal into a differential signal.

[0087] like Figure 5 As shown, the signal with an amplitude of A / 2 sent by the transmitting end Vx of the attacker M and the signal with an amplitude of -A / 2 sent by the transmitting end Vy of the victim N are synthesized into a differential signal. According to the definition, the differential signal component (Diff) refers to signals with the same amplitude but a phase difference of 180 degrees at any time, and the differential signal is the difference between the Diffs. At this time, the attacker signal M with a characteristic impedance of Zo and the victim signal N with a characteristic impedance of Zo together form a differential signal pair MN_DIFF, whose characteristic impedance is Z_DIFF.

[0088] refer to Figure 6 As shown, Figure 6 The electromagnetic field distribution diagram of the differential signal is shown.

[0089] S40: synthesize the second step signal and the third step signal into a common mode signal.

[0090] like Figure 7 As shown, the signal with an amplitude of A / 2 sent by the transmitting end Vx of the attacker M and the signal with an amplitude of A / 2 sent by the transmitting end Vy of the victim N are synthesized into a common mode signal. According to the definition, the common mode signal component (Common) is a signal with the same amplitude and zero phase difference at any time, and the common mode signal is the average value between Common. At this time, the attacker signal M with a characteristic impedance of Zo and the victim signal N with a characteristic impedance of Zo jointly form a common mode signal pair MN_COMMON, whose characteristic impedance is Z_Common.

[0091] refer to Figure 8 As shown, Figure 8 The electromagnetic field distribution diagram of the common mode signal is shown.

[0092] S50, obtaining a first response of the differential signal at the victim receiving end, and obtaining a second response of the common mode signal at the victim receiving end.

[0093] Exemplarily, obtaining a first response of the differential signal at the victim receiving end may include:

[0094] Obtain the equivalent relative dielectric constant of the differential signal line pair according to the thickness, line width, line spacing and height of the microstrip signal line;

[0095] Obtaining the propagation speed of the differential signal according to the propagation speed of the electromagnetic wave in the air and the equivalent relative dielectric constant of the differential signal line pair;

[0096] Acquiring a first time of the differential signal according to a propagation speed and a length of a microstrip signal line;

[0097] The amplitude of the differential signal received by the victim receiving end is obtained according to the amplitude of the differential signal and the attenuation of the channel.

[0098] Specifically, the propagation speed of the differential signal is the ratio of the propagation speed of the electromagnetic wave in the air to the arithmetic square root of the equivalent relative dielectric constant of the differential signal line pair; the first time of the differential signal is the ratio of the length of the microstrip signal line to the propagation speed; the amplitude of the differential signal received by the victim receiving end is the product of the amplitude of the differential signal and the attenuation of the channel.

[0099] The electrical energy stored in the microstrip arrangement exists in the air and the dielectric, so the effective dielectric constant of the signal on the transmission line will be between the dielectric constants of the air and the dielectric. This effective dielectric constant determines the phase velocity of the electromagnetic wave on the microstrip transmission line. Specifically, through the two-dimensional simulation tool, according to the thickness t, line width w, line spacing s and height h of the microstrip signal line, the equivalent relative dielectric constant ε of the differential signal line pair can be obtained. Eff_DIFf , and calculate the propagation speed of the differential signal according to the formula Where c is the propagation speed of light waves and electromagnetic waves in the air, c = 3 × 10 8 m / s, and from this we can derive the time TF it takes for the signal to travel from the attacker’s transmitter to the victim’s receiver. DIFF (Time of Flight, flight time), that is, the first time, Where l is the length of the signal line.

[0100] According to the attenuation of the channel (assuming it is k times), the amplitude Vt of the differential signal received by the victim receiver can be obtained DIFF = k·A / 2, such as Fig. 9 As shown, Tr is the rising edge time of the signal.

[0101] Exemplarily, obtaining a second response of the common mode signal at the victim receiving end includes:

[0102] According to the thickness, line width, line spacing and height of the microstrip signal line, the equivalent relative dielectric constant of the common mode signal line pair is obtained;

[0103] The propagation speed of the common mode signal is obtained according to the propagation speed of the electromagnetic wave in the air and the equivalent relative dielectric constant of the common mode signal line pair.

[0104] Acquire a second time of the common mode signal according to the propagation speed and the length of the microstrip signal line;

[0105] The amplitude of the common mode signal received by the victim receiving end is obtained according to the amplitude of the common mode signal and the attenuation of the channel.

[0106] Specifically, the propagation speed of the common-mode signal is the ratio of the propagation speed of the electromagnetic wave in the air to the arithmetic square root of the equivalent relative dielectric constant of the common-mode signal line pair; the second time of the common-mode signal is the ratio of the length of the microstrip signal line to the propagation speed; the amplitude of the common-mode signal received by the victim receiving end is the product of the amplitude of the common-mode signal and the attenuation of the channel.

[0107] Specifically, the equivalent relative dielectric constant ε of the common-mode signal line pair can be obtained through a two-dimensional simulation tool based on the thickness t, line width w, line spacing s and height h of the microstrip signal line. Eff_Common , and calculate the propagation speed of the common mode signal according to the formula Where c is the propagation speed of light waves and electromagnetic waves in the air, c = 3 × 10 8 m / s, and from this we can derive the time TF it takes for the signal to travel from the transmitter to the receiver. Common (Time of Flight, flight time), that is, the second time, Where l is the length of the signal line.

[0108] According to the attenuation of the channel (assuming it is k times), the amplitude Vt of the common mode signal received by the victim receiving end can be obtained Common = -k·A / 2, such as Fig.10 As shown, Tr is the rising edge time of the signal.

[0109] S60: Based on the first response and the second response, obtain the far-end crosstalk of the attacker to the victim.

[0110] Exemplarily, the first response includes a first amplitude of the differential signal received by the victim receiving end, and the second response includes a second amplitude of the common-mode signal received by the victim receiving end;

[0111] Acquiring the far-end crosstalk of the attacker to the victim based on the first response and the second response may include step S601, superimposing the first amplitude and the second amplitude to obtain the far-end crosstalk of the attacker to the victim.

[0112] According to the superposition principle of linear time-invariant systems, the far-end crosstalk can be equivalent to the superposition of the response of the differential signal at the victim receiving end and the response of the common-mode signal at the victim receiving end. The first response and the second response are obtained respectively, and the sum of the two is calculated to obtain the far-end crosstalk Vt of the attacker to the victim, that is, Vt = Vt DIFF +Vt Common .

[0113] Exemplarily, the first response further includes a first time taken for the differential signal to be transmitted from a transmitting end of the differential signal to a receiving end of the differential signal, and the second response further includes a second time taken for the common mode signal to be transmitted from a transmitting end of the common mode signal to a receiving end of the common mode signal;

[0114] Acquiring the far-end crosstalk of the attacker to the victim based on the first response and the second response may also include:

[0115] S602: Acquire a time difference between when the differential signal and the common mode signal arrive at the victim receiving end according to the first time and the second time.

[0116] For example, by Figure 6 Schematic diagram of the differential signal electromagnetic field distribution and Figure 8 It can be seen from the common-mode signal electromagnetic field distribution diagram that due to the voltage difference between the differential signal traces, the electromagnetic field through the air is more significant than the common-mode excitation. This leads to the effective dielectric constant ε of the differential signal Eff_DIFF Smaller than the effective dielectric constant ε of CS Eff_Common , so the propagation speed of the differential signal is v DIFF Higher than the propagation speed v of the common mode signal Common , thus obtaining the flight time TF of the differential signal DIFF Shorter than the flight time TF of the common mode signal Common The flight time TF of the differential signal DIFF and the flight time TF of the common mode signal Common , calculate the time difference ΔT between the differential signal and the common mode signal arriving at the victim receiving end, ΔT = TF Common -TF DIFF .

[0117] S603: Determine a relationship between a voltage and time of the far-end crosstalk according to the time difference and a rising edge time of a signal received by the victim receiving end.

[0118] Exemplarily, determining the relationship between the voltage and time of the far-end crosstalk according to the time difference and the rising edge time of the signal received by the victim receiving end may include:

[0119] In the case where the time difference is greater than or equal to the rising edge time, the voltage of the far-end crosstalk starts to drop from zero volts at a first time on the time axis, reaches a saturation value at the sum of the first time and the rising edge time on the time axis, the saturation value is the second amplitude, starts to rise at a second time on the time axis, and returns to zero at the sum of the rising edge time and the second time;

[0120] The peak duration of the far-end crosstalk voltage on the time axis is the difference between the time difference and the rising edge time.

[0121] Exemplarily, determining the relationship between the voltage and time of the far-end crosstalk according to the time difference and the rising edge time of the signal received by the victim receiving end may also include:

[0122] In the case where the time difference is less than the rising edge time, the voltage of the far-end crosstalk starts to drop from zero volts at a first time on the time axis, reaches a peak value at a second time on the time axis (the peak value is (-ΔT·k·A) / (2·Tr), and does not reach a saturation value of -k·A / 2), starts to rise at the sum of the first time on the time axis and the rising edge time, and returns to zero at the sum of the rising edge time and the second time;

[0123] The peak duration of the far-end crosstalk voltage on the time axis is the difference between the rising edge time and the time difference.

[0124] Specifically, the time difference ΔT (ΔT = TF) between the differential signal and the common mode signal arriving at the victim receiving end is Common -TF DIFF ) and the signal's rising edge time Tr, including the following two situations:

[0125] (1) ΔT ≥ Tr;

[0126] like Fig.11 Signal decomposition diagram and Fig.12 As shown in the signal superposition diagram, the far-end crosstalk voltage at time TF DIFF It starts to drop from zero volts at time Tr+TF DIFF The saturation value is -k·A / 2, and its peak duration is ΔT-Tr. At time TF Common It starts to rise at time Tr+TF Common The voltage returns to zero.

[0127] (2) ΔT <Tr;

[0128] like Fig.13 Signal decomposition diagram and Fig.14 As shown in the signal superposition diagram, the far-end crosstalk voltage at time TF DIFF The voltage starts to drop from zero volts at time TF. Common The peak value is (-ΔT·k·A) / (2·Tr), which is less than the saturation value -j·A / 2. The peak duration is Tr-ΔT. At time Tr+TF DIFF It starts to rise at time Tr+TF Common The voltage returns to zero.

[0129] In this way, the far-end crosstalk of the microstrip line signal is further quantified, thereby further improving the evaluation speed of the far-end crosstalk while maintaining a high evaluation accuracy.

[0130] The far-end crosstalk acquisition method of the microstrip line signal of the embodiment of the present application can quickly acquire the far-end crosstalk of the microstrip line signal through signal decomposition and superposition operations, thereby improving the evaluation speed of the far-end crosstalk.

[0131] In a specific example, Figure 2 As shown, assuming that the victim N is in a stationary state, when the transmitting end Vx of the attacker M sends a signal with an amplitude of A, the victim's near-end voltage Vy is the near-end crosstalk, and the victim's far-end voltage Vt is the far-end crosstalk.

[0132] The method for obtaining far-end crosstalk of a microstrip line signal in this example may include the following steps:

[0133] 1) Decompose the signal with amplitude A sent by the transmitting end Vx of the attacker M into two step signals with amplitude A / 2. The sum of these two step signals is the original attack signal with amplitude A.

[0134] 2) The stationary signal with an amplitude of 0 at the transmitting end Vy of the victim N is decomposed into a step signal with an amplitude of A / 2 and a step signal with an amplitude of -A / 2. The sum of these two signals is still 0.

[0135] 3) If Figure 5 As shown, the signal with an amplitude of A / 2 sent by the transmitting end Vx of the attacker M and the signal with an amplitude of -A / 2 sent by the transmitting end Vy of the victim N are synthesized into a differential transmission signal. According to the definition, the differential signal component (Diff) refers to signals with the same amplitude but a phase difference of 180 degrees at any time, and the differential signal is the difference between the Diffs. At this time, the attacker signal M with a characteristic impedance of Zo and the victim signal N with a characteristic impedance of Zo together form a differential signal pair MN_DIFF, whose characteristic impedance is Z_DIFF.

[0136] 4) If Figure 7 As shown, the signal with an amplitude of A / 2 sent by the transmitting end Vx of the attacker M and the signal with an amplitude of A / 2 sent by the transmitting end Vy of the victim N are synthesized into a common-mode transmission signal. According to the definition, the common-mode signal component (Common) is a signal with the same amplitude and zero phase difference at any time, and the common-mode signal is the average value between Common. At this time, the attacker signal M with a characteristic impedance of Zo and the victim signal N with a characteristic impedance of Zo jointly form a common-mode signal pair MN_COMMON, whose characteristic impedance is Z_Common.

[0137] 5) According to the superposition principle of linear time-invariant systems, the original problem is equivalent to the superposition of the response of the differential signal at the victim receiving end as described in step 3) and the response of the common-mode signal at the victim receiving end as described in step 4). The responses of 3) and 4) are obtained respectively, and the sum of the two is calculated to obtain the far-end crosstalk Vt of the attacker to the victim. That is, Vt = Vt DIFF +Vt Common .

[0138] 6) The electrical energy stored in the microstrip arrangement exists in the air and the dielectric, so the effective dielectric constant of the signal on the transmission line will be between the dielectric constants of the air and the dielectric. This effective dielectric constant determines the phase velocity of the electromagnetic wave on the microstrip transmission line. Through the two-dimensional simulation tool, the equivalent relative dielectric constant ε of the differential signal line pair can be obtained based on the thickness t, line width w, line spacing s and height h of the microstrip signal line Eff_DIFF , and calculate the propagation speed of the differential signal according to the formula Where c is the propagation speed of light waves and electromagnetic waves in the air, c = 3 × 10 8 m / s. From this, we can derive the time TF (Time of Flight) it takes for the signal to travel from the transmitter to the receiver. Where l is the length of the signal line.

[0139] 7) Through the two-dimensional simulation tool, according to the thickness t, line width w, line spacing s and height h of the microstrip signal line, the equivalent relative dielectric constant ε of the common mode signal line pair can be obtained. Eff_Common , and calculate the propagation speed of the common mode signal according to the formula Where c is the propagation speed of light waves and electromagnetic waves in the air, c = 3 × 10 8 m / s. From this, we can derive the time TF (Time of Flight) it takes for the signal to travel from the transmitter to the receiver. Where l is the length of the signal line.

[0140] 8) By Figure 6Schematic diagram of the differential signal electromagnetic field distribution and Figure 8 It can be seen from the common-mode signal electromagnetic field distribution diagram that due to the voltage difference between the differential signal traces, the electromagnetic field through the air is more significant than the common-mode excitation. This leads to the effective dielectric constant ε of the differential signal Eff_DIFF Smaller than the effective dielectric constant ε of CS Eff_Common , so the propagation speed of the differential signal is v DIFF Higher than the propagation speed v of the common mode signal Common , thus obtaining the flight time TF of the differential signal DIFF Shorter than the flight time TF of the common mode signal Common The flight time TF of the differential signal calculated by steps 6) and 7) is DIFF and the flight time TF of the common mode signal Common , calculate the time difference ΔT between the differential signal and the common mode signal arriving at the victim receiving end, ΔT = TF Common -TF DIFF .

[0141] 9) According to steps 3) and 6), and based on the attenuation of the channel (assuming it is k times), calculate the time TF of the differential signal received by the victim receiving end DIFF and amplitude Vt DIFF = k·A / 2, such as Fig. 9 As shown, Tr is the rising edge time of the signal.

[0142] 10) According to steps 4) and 7), and based on the attenuation of the channel (assuming it is k times), the time TF of the common mode signal received by the victim receiving end is obtained Common and amplitude Vt Common = -k·A / 2, such as Fig.10 As shown, Tr is the rising edge time of the signal.

[0143] 11) According to steps 9) and 10), the time and amplitude of the differential signal and the common mode signal received by the victim receiving end are obtained. According to the superposition principle of the linear time-invariant system described in step 5), the final far-end crosstalk of the attacker to the victim is obtained. That is, Vt = Vt DIFF +Vt Common .

[0144] The time difference between the differential signal and the common mode signal arriving at the victim receiving end is ΔT (ΔT = TF Common -TF DIFF ) and the signal's rising edge time Tr, including the following two situations:

[0145] 11A) ΔT ≥ Tr;

[0146] like Fig.11 Signal decomposition diagram and Fig.12As shown in the signal superposition diagram, the far-end crosstalk voltage at time TF DIFF It starts to drop from zero volts at time Tr+TF DIFF The saturation value is -k·A / 2, and its peak duration is ΔT-Tr. At time TF Common It starts to rise at time Tr+TF Common The voltage returns to zero.

[0147] 11B)ΔT <Tr;

[0148] like Fig.13 Signal decomposition diagram and Fig.14 As shown in the signal superposition diagram, the far-end crosstalk voltage at time TF DIFF The voltage starts to drop from zero volts at time TF. Common The peak value is (-ΔT·k·A) / (2·Tr), which is less than the saturation value -k·A / 2. The peak duration is Tr-ΔT. At time Tr+TF DIFF It starts to rise at time Tr+TF Common The voltage returns to zero.

[0149] The method of this example can realize rapid evaluation and quantification of the far-end crosstalk voltage (ie, Vt) of the microstrip line high-speed signal through the principle of signal decomposition and superposition.

[0150] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0151] refer to Fig.15 As shown, another embodiment of the present application provides a far-end crosstalk acquisition device for a microstrip line signal, comprising:

[0152] A first decomposition module is used to decompose the signal with amplitude A from the attacker's sending end into a first step signal and a second step signal with amplitudes A / 2;

[0153] A second decomposition module is used to decompose the static signal with an amplitude of 0 from the victim transmitting end into a third step signal with an amplitude of A / 2 and a fourth step signal with an amplitude of -A / 2;

[0154] A first synthesis module, used for synthesizing the first step signal and the fourth step signal into a differential signal;

[0155] A second synthesis module, used for synthesizing the second step signal and the third step signal into a common mode signal;

[0156] A response acquisition module, configured to acquire a first response of the differential signal at the victim receiving end, and to acquire a second response of the common mode signal at the victim receiving end;

[0157] The far-end crosstalk acquisition module is used to acquire the far-end crosstalk of the attacker to the victim based on the first response and the second response.

[0158] Exemplarily, the first response includes a first amplitude of a differential signal received by the victim receiving end, and the second response includes a second amplitude of a common-mode signal received by the victim receiving end;

[0159] The far-end crosstalk acquisition module is further specifically configured to superimpose the first amplitude and the second amplitude to obtain the far-end crosstalk of the attacker to the victim.

[0160] Exemplarily, the first response further includes a first time taken for the differential signal to be transmitted from a transmitting end of the differential signal to a receiving end of the differential signal, and the second response further includes a second time taken for the common mode signal to be transmitted from a transmitting end of the common mode signal to a receiving end of the common mode signal;

[0161] The far-end crosstalk acquisition module is further specifically used for:

[0162] Acquire a time difference between the differential signal and the common mode signal arriving at the victim receiving end according to the first time and the second time;

[0163] The relationship between the voltage and time of the far-end crosstalk is determined according to the time difference and the rising edge time of the signal received by the victim receiving end.

[0164] Exemplarily, determining the relationship between the voltage and time of the far-end crosstalk according to the time difference and the rising edge time of the signal received by the victim receiving end includes:

[0165] In the case where the time difference is greater than or equal to the rising edge time, the voltage of the far-end crosstalk starts to drop from zero volts at a first time on the time axis, reaches a saturation value at the sum of the first time and the rising edge time on the time axis, the saturation value is the second amplitude, starts to rise at a second time on the time axis, and returns to zero at the sum of the rising edge time and the second time;

[0166] The peak duration of the far-end crosstalk voltage on the time axis is the difference between the time difference and the rising edge time.

[0167] Exemplarily, determining the relationship between the voltage and time of the far-end crosstalk according to the time difference and the rising edge time of the signal received by the victim receiving end includes:

[0168] In the case where the time difference is less than the rising edge time, the voltage of the far-end crosstalk starts to drop from zero volts at a first time on the time axis, reaches a peak value at a second time on the time axis (the peak value is (-ΔT·k·A) / (2·Tr), and does not reach a saturation value of -k·A / 2), starts to rise at the sum of the first time on the time axis and the rising edge time, and returns to zero at the sum of the rising edge time and the second time;

[0169] The peak duration of the far-end crosstalk voltage on the time axis is the difference between the rising edge time and the time difference.

[0170] Exemplarily, obtaining a first response of the differential signal at a victim receiving end includes:

[0171] Obtain the equivalent relative dielectric constant of the differential signal line pair according to the thickness, line width, line spacing and height of the microstrip signal line;

[0172] Obtaining the propagation speed of the differential signal according to the propagation speed of the electromagnetic wave in the air and the equivalent relative dielectric constant of the differential signal line pair;

[0173] Acquiring a first time of the differential signal according to a propagation speed and a length of a microstrip signal line;

[0174] The amplitude of the differential signal received by the victim receiving end is obtained according to the amplitude of the differential signal and the attenuation of the channel.

[0175] Exemplarily, the propagation speed of the differential signal is a ratio of the propagation speed of the electromagnetic wave in the air to the arithmetic square root of the equivalent relative dielectric constant of the differential signal line pair;

[0176] The first time of the differential signal is the ratio of the length of the microstrip signal line to the propagation speed;

[0177] The amplitude of the differential signal received by the victim receiving end is the product of the amplitude of the differential signal and the attenuation of the channel.

[0178] Exemplarily, obtaining a second response of the common mode signal at the victim receiving end includes:

[0179] According to the thickness, line width, line spacing and height of the microstrip signal line, the equivalent relative dielectric constant of the common mode signal line pair is obtained;

[0180] The propagation speed of the common mode signal is obtained according to the propagation speed of the electromagnetic wave in the air and the equivalent relative dielectric constant of the common mode signal line pair.

[0181] Acquire a second time of the common mode signal according to the propagation speed and the length of the microstrip signal line;

[0182] The amplitude of the common mode signal received by the victim receiving end is obtained according to the amplitude of the common mode signal and the attenuation of the channel.

[0183] Exemplarily, the propagation speed of the common mode signal is the ratio of the propagation speed of the electromagnetic wave in the air to the arithmetic square root of the equivalent relative dielectric constant of the common mode signal line pair;

[0184] The second time of the common mode signal is the ratio of the length of the microstrip signal line to the propagation speed;

[0185] The amplitude of the common mode signal received by the victim receiving end is the product of the amplitude of the common mode signal and the attenuation of the channel.

[0186] Another embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a method of any of the above embodiments.

[0187] refer to Fig.16 As shown, the electronic device 10 may include: a processor 100, a memory 101, a bus 102 and a communication interface 103, and the processor 100, the communication interface 103 and the memory 101 are connected via the bus 102; the memory 101 stores a computer program that can be run on the processor 100, and when the processor 100 runs the computer program, it executes the method provided in any of the aforementioned embodiments of the present application.

[0188] The memory 101 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the device network element and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0189] The bus 102 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory 101 is used to store a program, and the processor 100 executes the program after receiving an execution instruction. The method disclosed in any implementation of the aforementioned embodiment of the present application may be applied to the processor 100, or implemented by the processor 100.

[0190] The processor 100 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 100 or an instruction in the form of software. The above processor 100 may be a general-purpose processor, which may include a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 101, and the processor 100 reads the information in the memory 101 and completes the steps of the above method in combination with its hardware.

[0191] The electronic device provided in the embodiment of the present application and the method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, operated or implemented by them.

[0192] Another embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program is executed by a processor to implement the method of any of the above embodiments. Fig.17 As shown, the computer-readable storage medium shown is a CD 20 on which a computer program (ie, a program product) is stored. When the computer program is run by a processor, the method provided by any of the aforementioned embodiments will be executed.

[0193] It should be noted that examples of computer-readable storage media may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0194] The computer-readable storage medium provided in the above-mentioned embodiments of the present application and the method provided in the embodiments of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, run or implemented by the application program stored therein.

[0195] It should be noted that:

[0196] The term "module" is not intended to be limited to a specific physical form. Depending on the specific application, a module can be implemented as hardware, firmware, software, and / or a combination thereof. In addition, different modules can share common components or even be implemented by the same components. There may or may not be clear boundaries between different modules.

[0197] The algorithm and display provided herein are not inherently related to any specific computer, virtual device or other equipment. Various general devices can also be used together with examples based on this. According to the above description, it is obvious to construct the structure required for this type of device. In addition, the application is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the application described herein, and the description made to specific languages ​​above is for the purpose of disclosing the best mode of implementation of the application.

[0198] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0199] The above embodiments only express the implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for obtaining far-end crosstalk of a microstrip line signal, characterized in that: include: Decompose the signal with amplitude A sent by the attacker into a first step signal and a second step signal with amplitude A / 2; Decomposing the stationary signal with an amplitude of 0 at the victim transmitting end into a third step signal with an amplitude of A / 2 and a fourth step signal with an amplitude of -A / 2; synthesizing the first step signal and the fourth step signal into a differential signal; synthesizing the second step signal and the third step signal into a common mode signal; Obtaining a first response of the differential signal at the victim receiving end, and obtaining a second response of the common mode signal at the victim receiving end; Based on the first response and the second response, the far-end crosstalk of the attacker to the victim is obtained.

2. The method according to claim 1, characterized in that The first response includes a first amplitude of a differential signal received by the victim receiving end, and the second response includes a second amplitude of a common mode signal received by the victim receiving end; The obtaining, based on the first response and the second response, the far-end crosstalk of the attacker to the victim includes: The first amplitude and the second amplitude are superimposed to obtain the far-end crosstalk of the attacker to the victim.

3. The method according to claim 2, characterized in that The first response further includes a first time taken for the differential signal to be transmitted from a transmitting end of the differential signal to a receiving end of the differential signal, and the second response further includes a second time taken for the common mode signal to be transmitted from a transmitting end of the common mode signal to a receiving end of the common mode signal; The acquiring the far-end crosstalk of the attacker to the victim based on the first response and the second response further includes: Acquire a time difference between the differential signal and the common mode signal arriving at the victim receiving end according to the first time and the second time; The relationship between the voltage and time of the far-end crosstalk is determined according to the time difference and the rising edge time of the signal received by the victim receiving end.

4. The method according to claim 3, characterized in that The determining the relationship between the voltage and time of the far-end crosstalk according to the time difference and the rising edge time of the signal received by the victim receiving end includes: In the case where the time difference is greater than or equal to the rising edge time, the voltage of the far-end crosstalk starts to drop from zero volts at a first time on the time axis, reaches a saturation value at the sum of the first time and the rising edge time on the time axis, the saturation value is the second amplitude, starts to rise at a second time on the time axis, and returns to zero at the sum of the rising edge time and the second time; The peak duration of the far-end crosstalk voltage on the time axis is the difference between the time difference and the rising edge time.

5. The method according to claim 3, characterized in that: The determining the relationship between the voltage and time of the far-end crosstalk according to the time difference and the rising edge time of the signal received by the victim receiving end includes: In the case where the time difference is less than the rising edge time, the voltage of the far-end crosstalk starts to drop from zero volts at a first time on the time axis, reaches a peak value at a second time on the time axis, starts to rise at the sum of the first time on the time axis and the rising edge time, and returns to zero at the sum of the rising edge time and the second time; The peak duration of the far-end crosstalk voltage on the time axis is the difference between the rising edge time and the time difference.

6. The method according to claim 3, characterized in that The obtaining of a first response of the differential signal at the victim receiving end includes: Obtain the equivalent relative dielectric constant of the differential signal line pair according to the thickness, line width, line spacing and height of the microstrip signal line; Obtaining the propagation speed of the differential signal according to the propagation speed of the electromagnetic wave in the air and the equivalent relative dielectric constant of the differential signal line pair; Acquiring a first time of the differential signal according to a propagation speed and a length of a microstrip signal line; The amplitude of the differential signal received by the victim receiving end is obtained according to the amplitude of the differential signal and the attenuation of the channel.

7. The method according to claim 6, characterized in that The propagation speed of the differential signal is the ratio of the propagation speed of the electromagnetic wave in the air to the arithmetic square root of the equivalent relative dielectric constant of the differential signal line pair; The first time of the differential signal is the ratio of the length of the microstrip signal line to the propagation speed; The amplitude of the differential signal received by the victim receiving end is the product of the amplitude of the differential signal and the attenuation of the channel.

8. The method according to claim 3, characterized in that The obtaining of a second response of the common mode signal at the victim receiving end includes: According to the thickness, line width, line spacing and height of the microstrip signal line, the equivalent relative dielectric constant of the common mode signal line pair is obtained; The propagation speed of the common mode signal is obtained according to the propagation speed of the electromagnetic wave in the air and the equivalent relative dielectric constant of the common mode signal line pair. Acquire a second time of the common mode signal according to the propagation speed and the length of the microstrip signal line; The amplitude of the common mode signal received by the victim receiving end is obtained according to the amplitude of the common mode signal and the attenuation of the channel.

9. The method according to claim 8, characterized in that The propagation speed of the common mode signal is the ratio of the propagation speed of the electromagnetic wave in the air to the arithmetic square root of the equivalent relative dielectric constant of the common mode signal line pair; The second time of the common mode signal is the ratio of the length of the microstrip signal line to the propagation speed; The amplitude of the common mode signal received by the victim receiving end is the product of the amplitude of the common mode signal and the attenuation of the channel.

10. A device for acquiring far-end crosstalk of a microstrip line signal, characterized in that: include: A first decomposition module is used to decompose the signal with amplitude A from the attacker's sending end into a first step signal and a second step signal with amplitudes A / 2; A second decomposition module is used to decompose the static signal with an amplitude of 0 from the victim transmitting end into a third step signal with an amplitude of A / 2 and a fourth step signal with an amplitude of -A / 2; A first synthesis module, used for synthesizing the first step signal and the fourth step signal into a differential signal; A second synthesis module, used for synthesizing the second step signal and the third step signal into a common mode signal; A response acquisition module, configured to acquire a first response of the differential signal at the victim receiving end, and to acquire a second response of the common mode signal at the victim receiving end; The far-end crosstalk acquisition module is used to acquire the far-end crosstalk of the attacker to the victim based on the first response and the second response.

11. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the far-end crosstalk evaluation method for a microstrip line signal as claimed in any one of claims 1 to 9.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement the far-end crosstalk evaluation method for a microstrip line signal according to any one of claims 1 to 9.

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