WO2014101782A1 - 一种模拟线缆自串扰的方法及装置 - Google Patents

一种模拟线缆自串扰的方法及装置 Download PDF

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Publication number
WO2014101782A1
WO2014101782A1 PCT/CN2013/090498 CN2013090498W WO2014101782A1 WO 2014101782 A1 WO2014101782 A1 WO 2014101782A1 CN 2013090498 W CN2013090498 W CN 2013090498W WO 2014101782 A1 WO2014101782 A1 WO 2014101782A1
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Prior art keywords
differential
line
pair
pairs
difference
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PCT/CN2013/090498
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English (en)
French (fr)
Inventor
戴丽儒
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华为技术有限公司
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Publication of WO2014101782A1 publication Critical patent/WO2014101782A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing
    • H04B3/487—Testing crosstalk effects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/34—Testing for cross-talk

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and an apparatus for simulating cable self-crosstalk. Background technique
  • xDSL is a high-speed data transmission technology transmitted in UTP (Unshielded Twist Pair), where xDSL is a general term for various types of DSL (Digital Subscribe Line).
  • Systems that use xDSL technology to provide multiple xDSL access are called DSL access multiplexers.
  • Crosstalk Due to the principle of electromagnetic induction, crosstalk is generated between DSL access signals connected to the multiplexer. Crosstalk is divided into NEXT (Near End Cross Talk) and FEXT (Far End Cross Talk). The energy of both crosstalk increases with the carrier frequency, where NEXT is for the system. The performance will not cause too much harm. However, due to the increase of the carrier frequency, the impact of FEXT on the system performance will be more and more serious.
  • the severe FEXT will significantly reduce the channel transmission rate.
  • the data transmission rate is numerically equal. Transmitting the number of bits constituting the data code per second is one of the important technical specifications for describing the data transmission system.
  • Conventional techniques often use signal processing to offset the FEXT generated between multiple signals, but this method usually requires a large number of unshielded twisted pairs in production, software development, and environmental test tests. The twisted pair has high cost, large space and high handling cost. Therefore, by using the simulation method to design an unshielded twisted pair cable model, development cost, space and labor can be greatly saved.
  • an unshielded twisted pair cable model is designed by using a simulation method, and a FEXT signal generated between twisted pairs in an analog cable is usually mixed by a filter, and is applied to the interfered by coupling.
  • a filter In the line, to reduce the effect of FEXT generated between multiple signals.
  • the circuit formed by the method of filter mixing and processing the FEXT signal is very complicated, which greatly affects the operation speed of the circuit. Summary of the invention
  • Embodiments of the present invention provide a method and apparatus for simulating cable self-crosstalk, which can simulate a twisted pair cable by arranging each differential pair on a preset position of a circuit board.
  • the crosstalk model greatly simplifies the model of the twisted pair self-crosstalk matrix circuit, and then mentions the operation speed of the circuit.
  • the embodiment of the present invention uses the following technical solution:
  • an embodiment of the present invention provides a method for simulating cable self-crosstalk, the method comprising: acquiring various differentials to be arranged on a circuit board a preset ground-to-ground impedance and a preset isolation of the pair, the pair of differential pairs each including a first differential line and a second differential line;
  • the adjusted first differential line a line width and a thickness, a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, each of the differential line pairs and a ground plane of the circuit board.
  • the distance between each of the differential pairs, and the center distance between adjacent pairs of differential pairs arrange each of the differential pairs at a predetermined position on the board.
  • the specific implementation is: the preset ground impedance of the differential pair is in a range of 45 ohms to 75 ohms.
  • the specific grounding impedance of the differential pair is specifically 50 ohms or 67. 5 ohms.
  • the specific implementation is: the preset isolation of the differential pair is 10 dB to -60 decibels.
  • the specific implementation is as follows: The specificity is -40 decibels.
  • an embodiment of the present invention provides an apparatus for simulating cable self-crosstalk, the apparatus comprising: an acquiring module, configured to acquire preset ground impedance and preset of each differential pair to be arranged on a circuit board The isolation, each pair of the differential pairs includes a first differential line and a second differential line;
  • a decision module configured to adjust a line width and a thickness of the first differential line, a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, and a distance between each of the differential pairs and a ground plane of the circuit board to adjust a ground impedance of each of the differential pairs;
  • the decision module is further configured to adjust a length of each of the differential pairs And an adjacent center distance between the differential pairs to adjust the isolation of each of the differential pairs;
  • an execution module configured to: when the ground impedance of each of the differential pairs is the preset ground The line width and the thickness of the first difference line, the line width and the thickness of the second difference line, and the thickness of the second difference line, and the thickness of the second difference line, and the thickness of the second difference line a center distance between the first difference line and the second difference line, a distance between each of the differential line pairs and a ground plane of the circuit board, a length of each of the differential line pairs, and an adjacent The center distance between the differential pairs
  • the specific grounding resistance of the differential pair is specifically 50 ohms or 67.5 ohms.
  • the specific isolation of the differential pair is 10 dB to -60 decibels.
  • the specific implementation is: the preset isolation of the differential pair is specifically -40 dB .
  • a method and device for simulating cable self-crosstalk provided by an embodiment of the present invention, by acquiring preset ground impedance and preset isolation of each differential pair to be arranged on a circuit board, each pair of differential pairs Each includes a first differential line and a second differential line, and adjusts a line width and a thickness of the first difference line, a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, and The distance between each differential pair and the ground plane of the board to adjust the ground impedance of each of the differential pairs, and to adjust the length of each differential pair, and the center distance between adjacent differential pairs.
  • the adjusted first difference is Line width and thickness of the line, line width and thickness of the second difference line, center distance between the first difference line and the second difference line, distance between each difference line pair and the ground plane of the circuit board, and each difference line The length of the pair, Between the center and the pitch of adjacent differential pairs, in a predetermined position on a circuit board arrangement of each differential pair.
  • the line width and thickness of the first difference line, the line width and thickness of the second difference line, the first difference line and the first line are determined by the preset ground impedance and the preset isolation of each differential pair.
  • the center distance between the two differential lines, the distance between each differential pair and the ground plane of the board, the length of each differential pair, and the center-to-center distance between adjacent differential pairs, and on the board The differential line pairs are arranged in the position to simulate the self-crosstalk model in the twisted pair cable, which greatly simplifies the model of the twisted pair self-crosstalk matrix circuit and improves the operation speed of the circuit.
  • FIG. 1 is a schematic flowchart 1 of a method for simulating cable self-crosstalk according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram 1 of a differential pair according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram 2 of a differential pair according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a self-crosstalk of an analog cable according to an embodiment of the present invention
  • Process diagram 2 FIG. 5 is a schematic diagram of a layout of a differential pair according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a module division of a differential pair according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a differential pair according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a layout of a differential pair according to an embodiment of the present invention
  • FIG. 1 is a schematic structural diagram 1 of a differential pair according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram 2 of a differential pair according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a self-crosstalk of an
  • FIG. 9 is a schematic diagram of a layout of a differential pair according to an embodiment of the present invention.
  • FIG. FIG. 1 is a schematic diagram of a module division of a differential pair according to an embodiment of the present invention;
  • FIG. 1 is a schematic diagram of a region division of a differential pair according to an embodiment of the present invention;
  • FIG. 14 is a schematic diagram of a layout of a differential pair according to an embodiment of the present invention;
  • FIG. 15 is a schematic diagram of a crosstalk of an analog cable according to an embodiment of the present invention; Schematic diagram of the structure of the device.
  • the embodiment of the invention provides a method for simulating cable self-crosstalk. As shown in FIG. 1, the method includes:
  • the analog cable self-crosstalk device obtains a preset ground impedance and a preset isolation of each differential pair to be arranged on the circuit board, and each pair of differential pairs includes a first differential line and a second Differential line.
  • the solid line cable simulation system of the DSL access multiplexer mainly comprises two parts: a line attenuation module and a line self-crosstalk module, wherein the line self-crosstalk module is a series connection and a line attenuation of the DSL access multiplexer.
  • the modules are connected.
  • a method for simulating cable self-crosstalk provided by an embodiment of the present invention is applied to a line self-crosstalk module of a DSL access multiplexer, and simulates a positional relationship between each differential pair to simulate a high simulation degree. The self-crosstalk relationship inside the solid cable.
  • each pair of differential pairs is composed of two identical differential lines, and the two differential lines respectively transmit two equal-inverted signals.
  • a pair of differential lines has a reference voltage of 0 volts.
  • the voltage transmitted by the differential line has a volt of 2 volts, and the voltages of the two differential lines respectively transmit volts of +1 volt and -1 volt; or, the reference voltage of a pair of differential lines is 3 volts, the differential line
  • the voltage transmitted has a volt of 4 volts, and the voltages transmitted by the two differential lines are respectively +5 volts and +1 volts.
  • the device for simulating a cable self-crosstalk first obtains a preset ground impedance and a preset isolation of each differential pair to be arranged on a circuit board, Each pair of differential pairs includes a first differential line and a second differential line.
  • the analog cable self-interference device adjusts the line width and thickness of the first differential line, the line width and thickness of the second difference line, the center distance between the first difference line and the second difference line, and each difference The distance between the pair and the ground plane of the board to adjust the ground impedance of each differential pair.
  • the analog cable self-crosstalk device After the analog cable self-crosstalk device obtains the preset ground impedance and the preset isolation of each differential pair to be arranged on the circuit board, the analog cable self-crosstalk device needs to adjust the line width of the first differential line.
  • the ground plane of the circuit board refers to a plane equal to the ground potential on the circuit board, and the ground plane of the circuit board may be the lower surface of the circuit board.
  • each pair of differential pairs includes a first differential line 01 and a second differential line 02, and a line of the first differential line 01.
  • the width is D1
  • the thickness of the first differential line 01 is T 1
  • the line width of the second difference line 02 is D2
  • the thickness of the second difference line 02 is T2
  • the difference between the first difference line 01 and the second difference line 02 is S 1
  • the distance between the differential pair and the ground plane 03 of the board is H l .
  • the line width D1 and the thickness T1 of the first differential line 01 of the pair of differential lines the line width D2 and the thickness T2 of the second difference line 02, between the first difference line 01 and the second difference line 02
  • the center distance S1, and the distance HI between each differential line pair and the ground plane 03 of the board jointly correspond to the ground impedance of a differential pair
  • the line width D2 and the thickness T2 of the line 02, the center distance S1 between the first difference line 01 and the second difference line 02, and the distance HI between the respective differential line pairs and the ground plane 03 of the board may have various combinations.
  • the method is as long as the ground impedance of the differential pair can satisfy the value of the preset ground impedance.
  • the center distance S1 between the first difference line 01 and the second difference line 02 and the distance HI between the differential line pair and the ground plane 03 of the circuit board are proportional to the ground impedance of the differential line pair;
  • the first difference line The line width D1 of 01, the line width D2 of the second difference line 02, the thickness T1 of the first difference line 01, and the thickness of the second difference line 02 are inversely proportional to the ground impedance of the differential line pair.
  • the analog cable self-crosstalk device adjusts the length of each differential pair and the center distance between adjacent differential pairs to adjust the isolation of each differential pair.
  • the analog cable self-crosstalk device After the analog cable self-crosstalk device obtains the preset ground impedance and the preset isolation of each differential pair to be arranged on the circuit board, the analog cable self-crosstalk device needs to adjust the length of each differential pair. And the center distance between adjacent differential pairs to adjust the isolation of each differential pair.
  • FIG. 3 is a cross-sectional view of a positional relationship between four pairs of differential pairs, the first differential pair 1 is adjacent to the second differential pair 2, and the third differential pair 3,
  • the second differential pair 2 is adjacent to the first differential pair 1 and the fourth differential pair 4
  • the third differential pair 3 is adjacent to the first differential pair 1, and the fourth differential pair 4, the fourth difference
  • the line pair is adjacent to the second differential line pair 2 and the third differential line pair 3, so the center distance between adjacent differential line pairs may indicate the center distance S2 between adjacent differential line pairs located in the same layer
  • the center distance between the first differential pair 1 and the second differential pair 2 may also indicate a center distance S3 between adjacent differential pairs of different layers, for example, the first differential pair 1 and the first
  • the center distance between the three differential pairs 3 may also indicate the height center distance H2 between adjacent differential pairs of different layers, for example, the height between the second differential pair 2 and the fourth differential pair 4.
  • Center distance Obtained from a device that simulates a cable self-crosstalk Preset isolation, adjust the center distance S2 between adjacent differential pairs in the same layer, the center distance S 3 between adjacent differential pairs in different layers, adjacent differential lines in different layers The height center distance H2 between the pairs, and the length L of the differential pair (not shown).
  • the isolation is the center distance S2 between adjacent differential pairs in the same layer, the center distance S 3 between adjacent differential pairs of different layers, and the adjacent differential pairs in different layers.
  • the height center distance H2 can be variously combined as long as it can satisfy the value that the isolation of the differential pair satisfies the preset isolation.
  • the isolation of the pair is a preset isolation
  • the line width and thickness of the adjusted first differential line, the line width and thickness of the second difference line, and the center distance between the first difference line and the second difference line , the distance between each differential pair and the ground plane of the board, the length of each differential pair, and the center distance between adjacent differential pairs is preset on the board
  • Each differential pair is arranged on the top.
  • the analog cable self-crosstalking device After obtaining the preset ground impedance and the preset isolation of each differential pair to be arranged on the circuit board by the analog cable self-crosstalk device, adjusting the line width and thickness of the first differential line, the second difference line Line width and thickness, the center distance between the first difference line and the second difference line, the distance between each differential line pair and the ground plane of the board, the length of each differential pair, and the adjacent differential line pair.
  • the center-to-center distance when the impedance of the ground of each differential pair is a preset ground impedance, and the isolation of each differential pair is a preset isolation, according to the line width and thickness of the adjusted first differential line a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, a distance between each difference line pair and a ground plane of the circuit board, a length of each differential line pair, and a phase
  • the analog cable self-crosstalking device arranges the differential pairs on the board's preset position.
  • a method for simulating cable self-crosstalk provided by an embodiment of the present invention a preset ground impedance and a preset isolation of each differential pair disposed on the circuit board, each pair of differential pairs including a first differential line and a second differential line, and adjusting a line width of the first differential line and Thickness, line width and thickness of the second differential line, ground impedance of each differential pair between the first differential line and the second differential line, and adjustment of length of each differential pair, and between adjacent differential pairs The center distance of the differential pair to adjust the isolation of each differential pair.
  • the impedance of the ground of each differential pair is a preset impedance to ground
  • the isolation of each differential pair is a preset isolation
  • the adjusted The line width and thickness of a differential line, the line width and thickness of the second difference line, the center distance between the first difference line and the second difference line, and the distance between each differential line pair and the ground plane of the board, The length of the differential pair, and the center-to-center distance between adjacent differential pairs, arrange the differential pairs on the board's preset position.
  • the line width and thickness of the first difference line, the line width and thickness of the second difference line, the first difference line and the first line are determined by the preset ground impedance and the preset isolation of each differential pair.
  • the center distance between the two differential lines, the distance between each differential pair and the ground plane of the board, the length of each differential pair, and the center-to-center distance between adjacent differential pairs, and on the board The differential line pairs are arranged in the position to simulate the self-crosstalk model in the twisted pair cable, which greatly simplifies the model of the twisted pair self-crosstalk matrix circuit and improves the operation speed of the circuit.
  • the embodiment of the invention provides a method for simulating cable self-crosstalk. As shown in FIG. 4, the method includes:
  • the analog cable self-crosstalk device obtains a preset ground impedance and a preset isolation of each differential pair to be arranged on the circuit board, and each pair of differential pairs includes a first differential line and a second Differential line.
  • the solid line cable simulation system of the DSL access multiplexer mainly comprises two parts: a line attenuation module and a line self-crosstalk module, wherein the line self-crosstalk module is a line attenuation module in series and DSL access multiplexer. Connected.
  • a method for simulating cable self-crosstalk provided by an embodiment of the present invention is applied to a line self-crosstalk module of a DSL access multiplexer, and simulates a positional relationship between each differential pair to simulate a high simulation degree. The self-crosstalk relationship inside the solid cable.
  • each pair of differential pairs is composed of two identical differential lines, and the two differential lines respectively transmit two signals of equal inversion, for example, a pair of differential lines.
  • the reference voltage is 0 volts, and the voltage transmitted by the differential line has a volt of 2 volts, and the voltages of the two differential lines respectively transmit volts of +1 volt and -1 volt; or, the reference voltage of a pair of differential lines is At 3 volts, the voltage transmitted by the differential line has a volt of 4 volts, and the voltages transmitted by the two differential lines are respectively +5 volts and +1 volts.
  • the characteristic impedance of the differential line is taken as 1 times of the preset pair low impedance of the differential pair, and thus the characteristic impedance of the differential line is in the range of 90 ohms to 150 ohms. Specifically, the characteristic impedance of the differential line is 100 ohms or 1 35 ohms.
  • a method for simulating cable self-crosstalk according to an embodiment of the present invention, the device for simulating a cable self-crosstalk first obtains a preset ground impedance and a preset isolation of each differential pair to be arranged on a circuit board, Each pair of differential pairs includes a first differential line and a second differential line.
  • the preset ground impedance of the differential pair is in the range of 45 ohms to 75 ohms. Specifically, the preset of the differential pair is 50 ohms or 67. 5 ohms.
  • the preset isolation of the differential pair is in the range of 10 dB to -60 dB. Specifically, the differential isolation has a preset isolation of -40 dB.
  • the analog cable self-crosstalk device adjusts a line width and a thickness of the first differential line, a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, and each differential line pair. The distance from the ground plane of the board to adjust the ground impedance of each differential pair.
  • the analog cable self-crosstalk device After the analog cable self-crosstalk device obtains the preset ground impedance and the preset isolation of each differential pair to be arranged on the circuit board, the analog cable self-crosstalk device needs to adjust the line width of the first differential line. And thickness, a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, and a distance between each differential line pair and a ground plane of the circuit board to adjust each differential line pair Earth impedance.
  • the ground plane of the circuit board refers to a plane equal to the ground potential on the circuit board, and the ground plane of the circuit board may be the lower surface of the circuit board.
  • each pair of differential pairs includes a first differential line 01 and a second differential line 02, the line width of the first difference line 01 is D1, the thickness of the first difference line 01 is T1, and the line width of the second difference line 02
  • the thickness of the second differential line 02 is T2
  • the center distance between the first differential line 01 and the second differential line 02 is S1
  • the distance between the differential line pair and the ground plane 03 of the board is H1.
  • the line width D1 and the thickness T1 of the first differential line 01 of the pair of differential lines the line width D2 and the thickness T2 of the second difference line 02, between the first difference line 01 and the second difference line 02
  • the center distance S1, and the distance HI between each differential line pair and the ground plane 03 of the board jointly correspond to the ground impedance of a differential pair
  • the line width D2 and the thickness T2 of the line 02, the center distance S1 between the first difference line 01 and the second difference line 02, and the distance HI between the respective differential line pairs and the ground plane 03 of the board may have various combinations.
  • the method is as long as the ground impedance of the differential pair can satisfy the value of the preset ground impedance.
  • the center distance S1 between the first difference line 01 and the second difference line 02 and the distance HI between the differential line pair and the ground plane 03 of the circuit board are proportional to the ground impedance of the differential line pair;
  • the first difference line The line width D1 of 01, the line width D2 of the second difference line 02, the thickness T1 of the first difference line 01, and the thickness of the second difference line 02 are inversely proportional to the ground impedance of the differential line pair.
  • the analog cable self-crosstalk device adjusts the length of each differential pair and the center distance between adjacent differential pairs to adjust the isolation of each differential pair.
  • the analog cable self-crosstalk device needs to adjust the length of each differential pair. And the center distance between adjacent differential pairs to adjust the isolation of each differential pair. Exemplarily, as shown in FIG.
  • the center distance between adjacent differential line pairs may indicate the center distance S2 between adjacent differential line pairs located in the same layer
  • the center distance between the first differential pair 1 and the second differential pair 2 may also indicate a center distance S3 between adjacent differential pairs of different layers, for example, the first differential pair 1 and the first
  • the center distance between the three differential pairs 3 may also indicate the height center distance H2 between adjacent differential pairs of different layers, for example, the height between the second differential pair 2 and the fourth differential pair 4.
  • Center distance Adjusting the center distance S2 between adjacent differential pairs located on the same layer according to the preset isolation obtained by the analog cable self-crosstalk device, and the center distance S3 between adjacent differential pairs of different layers, The height center distance H2 between adjacent differential pairs located in different layers, and the length L of the differential pair (not shown).
  • the center distance S2 between adjacent differential line pairs located in the same layer the center distance S3 between adjacent differential line pairs of different layers, adjacent differential line pairs located in different layers
  • the height center distance H2 between them and the length L of the differential line pair together correspond to the isolation of the difference line
  • the center distance S2 between adjacent differential line pairs in the same layer, adjacent differential lines in different layers The center distance S3 between the pairs, the height center distance H2 between adjacent differential line pairs located in different layers may have various combinations, as long as the isolation of the differential line pair can satisfy the value of the preset isolation. .
  • the isolation of the pair is a preset isolation
  • the line width and thickness of the adjusted first differential line, the line width and thickness of the second difference line, and the center distance between the first difference line and the second difference line , the distance between each differential pair and the ground plane of the board, the length of each differential pair, and the center distance between adjacent differential pairs is preset on the board
  • Each differential pair is arranged on the top.
  • the analog cable self-crosstalking device arranges the differential pairs on a predetermined position on the board.
  • the printed circuit board is made up of many layers of circuit boards.
  • the analog cable self-crosstalk device distributes the M pairs of differential pairs on the N-layer circuit board, and the M/N pair differential line pairs are distributed on each layer of the circuit board.
  • M is a positive integer
  • N is a positive integer
  • M/N is a positive integer
  • the line width and thickness of the first differential line of each pair of differential pairs, the line width and thickness of the second difference line, the first difference line The center distance from the second differential line, the distance between each differential pair and the ground plane of the board, the length of each differential pair, and the center distance between adjacent differential pairs have been adjusted to
  • the ground impedance of the differential pair is a preset impedance to ground
  • the isolation of each differential pair is a preset isolation.
  • the differential pair maintains a certain state within the distance L1, when the differential pair passes the distance L1,
  • the differential line pairs in the Al and A2 AX modules are divided into Y areas, and the Y areas are respectively Bl and B2 BY.
  • the modules A1 and A2 also adjust the positional relationship of the differential pairs in a clockwise direction, where the modules A1, A2, AX and the regions B1 and B2 are both along. Adjust the positional relationship of differential pairs in the same direction.
  • the modules A1, A2, AX, and the regions B1 and B2 BY may adjust the positional relationship of the differential pairs in a clockwise direction, or may be along the inverse The direction of the hour hand adjusts the positional relationship of the differential pair, and the present invention is not limited.
  • B2 BY. Bl, B2 BY adjusts the positional relationship of the differential pairs in a clockwise direction.
  • the modules A1 and A2 also adjust the positional relationship of the differential pairs in a clockwise direction, where the modules Al, A2 AX and the regions Bl, B2 BY
  • the positional relationship of the differential pairs is adjusted in the same direction. Therefore, when the differential pair is passing the distance L1, the position of the M pair of differential pairs occurs to achieve the purpose of analog cable self-crosstalk.
  • the process of the change has been described in detail in the above embodiments, and will not be described again here.
  • each differential line pair is arranged on a preset position of the circuit board disposed at a preset position of the circuit board, which can satisfy any pair of differential line pairs and the remaining differential line pairs.
  • the crosstalk condition can achieve the purpose of simulating cable self-crosstalk, and the invention is not limited.
  • the 100 pairs of differential pairs are arranged on the preset position of the board, and the cross-sectional view of the positional relationship of 100 pairs of differential pairs in a space is as shown in FIG. 5. Show (the numbers 1, 2 ... 100 in the box represent the serial number of the differential pair).
  • the printed circuit board is made up of many layers of circuit boards.
  • the analog cable self-crosstalk device distributes 100 pairs of differential pairs on a 10-layer board, and 10 pairs of differential pairs are distributed on each board.
  • the line width and thickness of the first differential line of each pair of differential pairs, the line width and thickness of the second difference line, the center distance between the first difference line and the second difference line, and the differential line pairs and the circuit board The distance between the ground planes, the length of each differential pair, and the center distance between adjacent differential pairs have been adjusted such that the impedance of the ground of each differential pair is a preset impedance to ground, and each differential line
  • the isolation of the pair is the preset isolation.
  • 100 pairs of differential line pairs are divided into four 5*5 modules, and the four modules are Al, A2, A3, and A4, respectively.
  • the differential line pairs in the Al, A2, A3, and A4 modules are divided into five areas, and the five areas are respectively B1, B2, B3, B4, and B5. Taking the A1 module as an example, as shown in FIG.
  • the area B1 includes Differential line pairs 1, 1, 3, 1 1 , 12, and 1 3
  • region B2 includes differential pairs 4
  • region B 3 includes differential pairs 33, 34, 35, 43, 44 and 45
  • the area B4 comprises differential pairs 21, 22, 31, 32, 41 and 42
  • the area B5 comprises a differential pair 23.
  • centering on the central area B5, Bl, B2, B3, and B4 adjust the positional relationship of the differential pairs in a clockwise direction, and the modules A1, A2, A3, and A4 are also adjusted in a clockwise direction.
  • the positional relationship of the differential pairs, in which the modules A1, A2, A3, and A4 and the regions B1, B2, B3, B4, and B5 all adjust the positional relationship of the differential pairs in the same direction.
  • the modules A1, A2, A3, and A4 and the regions B1, B2, B3, B4, and B5 can adjust the differential pair in a clockwise direction.
  • the positional relationship can also adjust the positional relationship of the differential pairs in the counterclockwise direction, which is not limited by the present invention.
  • the position of the 100 pairs of differential pairs changes. Re-divide the differential pairs in the Al, A2, A3, and A4 modules.
  • the five areas are Bl, B2, B3, B4, and B5.
  • Bl, B2, B3, and B4 adjust the positional relationship of the differential pairs in a clockwise direction, and the modules A1, A2, A3, and A4 also follow the clockwise direction.
  • the positional relationship of the differential pairs is adjusted, wherein the modules A1, A2, A3, and A4 and the regions B1, B2, B3, B4, and B5 all adjust the positional relationship of the differential pairs in the same direction.
  • the position of the 100 pairs of differential pairs changes once, so that any pair of differential pairs and the remaining differential pairs generate crosstalk, thereby achieving the purpose of simulating cable self-crosstalk.
  • the process of the change has been described in detail in the above embodiments, and will not be described again here.
  • the 54 pairs of differential pairs are arranged at a preset position on the board, and the cross-sectional view of the positional relationship of 54 pairs of differential pairs in a space is as shown in FIG. Show (the numbers 1, 2, 54 in the box represent the serial number of the differential pair).
  • the printed circuit board is made up of many layers of circuit boards.
  • the analog cable self-crosstalk device distributes 54 pairs of differential pairs on a 6-layer circuit board. Each layer of the board is distributed with 9 pairs of differential pairs. a line width and a thickness of the first differential line of each pair of differential pairs, a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, and each differential line pair and the circuit board. The distance between the ground planes, the length of each differential pair, and the center distance between adjacent differential pairs have been adjusted such that the ground impedance of each differential pair is a preset ground impedance, and each differential pair The isolation is the preset isolation. As shown in FIG.
  • modules A1, A2, A3, A4, A5, and A6 and the regions B1, B2, B3, B4, and B5 all adjust the positional relationship of the differential pairs in the same direction.
  • modules A1, A2, A3, A4, A5, and A6 and regions B1, B2, B3, B4, and B5 can be adjusted in a clockwise direction.
  • the positional relationship of the differential pairs may also adjust the positional relationship of the differential pairs in the counterclockwise direction, which is not limited in the present invention.
  • the position of the 54 pairs of differential pairs changes. Re-divide the differential pairs in the Al, A2, A3, A4, A5, and A6 modules.
  • the five areas are Bl, B2, B3, B4, and B5.
  • centering on the central area B5, Bl, B2, B3, and B4 adjust the positional relationship of the differential pairs in a clockwise direction, and at the same time, the modules A1, A2, A3, A4, A5, and A6 are also aligned.
  • the direction of the hour hand adjusts the positional relationship of the differential pairs, wherein the modules A1, A2, A3, A4, A5, and A6 and the regions B1, B2, B3, B4, and B5 all adjust the positional relationship of the differential pairs in the same direction.
  • a method for simulating cable self-crosstalk obtains a preset ground impedance and a preset isolation of each differential pair to be arranged on a circuit board, and each pair of differential pairs includes a first differential line and a second differential line, and adjusting a line of the first differential line Width and thickness, line width and thickness of the second difference line, ground impedance of each differential pair between the first difference line and the second difference line, and adjustment of length of each differential line pair, and adjacent differential line pairs The center distance between the two to adjust the isolation of each differential pair.
  • the impedance of the ground of each differential pair is the preset impedance to ground
  • the isolation of each differential pair is the preset isolation
  • the line width and thickness of the first differential line, the line width and thickness of the second difference line, the center distance between the first difference line and the second difference line, and the distance between each differential line pair and the ground plane of the board , the length of each differential pair, and the center distance between adjacent differential pairs arrange each differential pair on the board's preset position.
  • the line width and thickness of the first difference line, the line width and thickness of the second difference line, the first difference line and the first line are determined by the preset ground impedance and the preset isolation of each differential pair.
  • the center distance between the two differential lines, the distance between each differential pair and the ground plane of the board, the length of each differential pair, and the center-to-center distance between adjacent differential pairs, and on the board The differential line pairs are arranged in the position to simulate the self-crosstalk model in the twisted pair cable, which greatly simplifies the model of the twisted pair self-crosstalk matrix circuit and improves the operation speed of the circuit.
  • An embodiment of the present invention provides a device 8 for simulating cable self-crosstalk. As shown in FIG. 15, the device includes:
  • the obtaining module 8 0 is configured to obtain a preset ground impedance and a preset isolation of each differential pair to be arranged on the circuit board, and each pair of differential pairs includes a first differential line and a second differential line;
  • the decision module 8 1 is configured to adjust a line width and a thickness of the first differential line, a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, and each differential line pair and circuit The distance between the ground planes of the plates to adjust the ground impedance of each differential pair;
  • the decision module 8 1 is further configured to adjust the length of each differential pair and the center distance between adjacent differential pairs to adjust the isolation of each differential pair;
  • the execution module 82 is configured to: when the impedance of the ground of each differential pair is a preset impedance to ground, and the isolation of each differential pair is a preset isolation, the line width and thickness of the adjusted first differential line , the line width and thickness of the second difference line, the center distance between the first difference line and the second difference line, the distance between each difference line pair and the ground plane of the circuit board, and each difference The length of the pair, and the center-to-center distance between adjacent differential pairs, arrange the differential pairs on the board's preset position.
  • the preset ground pair impedance of the differential pair is in the range of 45 ohms to 75 ohms.
  • the preset ground impedance of the differential pair is 50 ohms or 67. 5 ohms. Further, the preset isolation of the differential pairs is in the range of 10 decibels to -60 decibels.
  • the differential isolation has a preset isolation of -40 dB.
  • the device includes anti-and preset isolation, each pair of differential pairs includes a first differential line and a second differential line, and a decision module is used for adjusting The line width and thickness of the first differential line, the line width and thickness of the second difference line, the center distance between the first difference line and the second difference line, and the distance between each differential line pair and the ground plane of the board
  • the decision module is also used to adjust the length of each differential pair and the center distance between adjacent differential pairs to adjust the isolation of each differential pair
  • the execution module is configured to: when the ground impedance of each differential pair is a preset ground impedance, and the isolation of each differential pair is a preset isolation, to adjust the line width and thickness of the first differential line, The line width and thickness of the second difference line, the center distance between the first difference line and the second difference line, the distance between each
  • the line width and thickness of the first difference line, the line width and thickness of the second difference line, the first difference line and the first line are determined by the preset ground impedance and the preset isolation of each differential pair.
  • the center distance between the two differential lines, the distance between each differential pair and the ground plane of the board, the length of each differential pair, and the center-to-center distance between adjacent differential pairs, and on the board The differential line pairs are arranged in the position to simulate the self-crosstalk model in the twisted pair cable, which greatly simplifies the model of the twisted pair self-crosstalk matrix circuit and improves the operation speed of the circuit.
  • An embodiment of the present invention provides an apparatus for simulating cable self-crosstalk, the apparatus comprising: a processor, configured to acquire preset ground impedance and preset isolation of each differential pair to be arranged on a circuit board,
  • the pair of differential lines includes a first difference line and a second difference line, And adjusting a line width and a thickness of the first difference line, a line width and a thickness of the second difference line, a center distance between the first difference line and the second difference line, and a ground plane between each of the differential line pairs and the circuit board
  • the center distance between the lines, the distance between each differential pair and the ground plane of the board, the length of each differential pair, and the center distance between adjacent differential pairs are arranged on the board,
  • the length of each differential pair, and the center distance between adjacent differential pairs are adjusted distances.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the steps of the foregoing method embodiments are included; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种模拟线缆自串扰的方法及装置，涉及通信领域，能够简化双绞线自串扰矩阵电路的模型，进而提到了电路的运算速度。该方法包括：获取需排布在电路板上的各个差分线对的预设对地阻抗和预设隔离度，每对差分线对均包括第一差分线和第二差分线；调整第一差分线的线宽及厚度，第二差分线的线宽及厚度，第一差分线与第二差分线之间的中心距，各个差分线对与电路板的地平面之间的距离，以调整各个差分线对的对地阻抗；调整各个差分线对的长度，相邻的差分线对之间的中心距，以调整各个差分线对的隔离度；当各个差分线对的对地阻抗为预设对地阻抗，且各个差分线对的隔离度为预设隔离度时，在电路板的预设位置上排布各个差分线对。

Description

一种模拟线缆自串扰的方法及装置 技术领域 本发明涉及通信领域，尤其涉及一种模拟线缆自串扰的方法及装 置。 背景技术
xDSL是一种在 UTP ( Unshielded Twist Pair, 无屏蔽双绞线） 中传输的高速数据传输技术， 其中 xDSL是各种类型的 DSL (Digital Subscribe Line, 数字用户线路）的总称。 运用 xDSL 技术提供多路 xDSL接入的系统被称为 DSL接入复用器。 由于电磁感应原理， DSL接 入复用器接入的多路信号之间， 会相互产生串扰。 串扰被分为 NEXT ( Near End Cross Talk, 近端串扰） 和 FEXT ( Far End Cross Talk, 远端串扰）， 两种串扰的能量都会随着载波频率的升高而增大，其中， NEXT 对系统的性能不会产生太大的危害， 但是， 由于载波频率的升 高， FEXT对系统性能的影响会越来越大， 严重的 FEXT会显著降低信 道传输速率， 其中， 数据传输速率在数值上等于每秒钟传输构成数据 代码的比特数， 是描述数据传输系统的重要技术指标之一。 传统的技术中通常使用信号处理的方法来抵消多路信号之间产 生的 FEXT, 但是这种方法通常在生产、 软件开发、 环境试验测试中 需要用到大量的无屏蔽双绞线， 使用无屏蔽双绞线成本高， 占用空间 巨大， 搬运成本高。 因此， 通过使用仿真的方法设计无屏蔽双绞线线 缆模型， 可以大大节省开发成本， 节约空间和劳动力。
现有技术中， 使用仿真的方法设计无屏蔽双绞线线缆模型， 通常 是用滤波器把模拟线缆中的双绞线之间产生的 FEXT信号混合处理， 通过耦合的方式施加到受干扰的线路中， 以达到降低多路信号之间产 生的 FEXT的作用。 然而， 使用滤波器混合处理 FEXT信号的方法所组 成的电路十分复杂， 大大影响了电路的运算速度。 发明内容
本发明的实施例提供一种模拟线缆自串扰的方法及装置，能够通 过在电路板的预设位置上排布各个差分线对来模拟双绞线线缆内自 串扰的模型， 大大简化了双绞线自串扰矩阵电路的模型， 进而提到了 电路的运算速度。 为达到上述目的， 本发明的实施例釆用如下技术方案： 第一方面， 本发明实施例提供一种模拟线缆自串扰的方法， 该方 法包括： 获取需排布在电路板上的各个差分线对的预设对地阻抗和预设 隔离度， 每对所述差分线对均包括第一差分线和第二差分线；
调整所述第一差分线的线宽及厚度，所述第二差分线的线宽及厚 度， 所述第一差分线与所述第二差分线之间的中心距， 以及各个所述 差分线对与所述电路板的地平面之间的距离，以调整各个所述差分线 对的对地阻抗； 调整各个所述差分线对的长度，以及相邻的所述差分线对之间的 中心距， 以调整各个所述差分线对的隔离度；
当各个所述差分线对的对地阻抗为所述预设对地阻抗，且各个所 述差分线对的隔离度为所述预设隔离度时，以调整后的所述第一差分 线的线宽及厚度， 所述第二差分线的线宽及厚度， 所述第一差分线与 所述第二差分线之间的中心距，各个所述差分线对与所述电路板的地 平面之间的距离， 各个所述差分线对的长度， 以及相邻的所述差分线 对之间的中心距， 在所述电路板的预设位置上排布各个所述差分线 对。 在第一种可能的实现方式中， 根据第一方面， 具体实现为： 所述 差分线对的预设对地阻抗在 45欧姆至 75欧姆的范围内。
在第二种可能的实现方式中，结合第一方面或第一种可能的实现 方式， 具体实现为： 所述差分线对的预设对地阻抗具体为 50欧姆或 者 67. 5欧姆。
在第三种可能的实现方式中，结合第一方面或第一种可能的实现 方式或第二种可能的实现方式， 具体实现为： 所述差分线对的预设隔 离度的在 10分贝至 -60分贝的范围内。 在第四种可能的实现方式中，结合第一方面或第一种可能的实现 方式至第三种可能的实现方式， 具体实现为： 所述差分线对的预设隔 离度具体为 -40分贝。
第二方面， 本发明实施例提供一种模拟线缆自串扰的装置， 该装 置包括： 获取模块，用于获取需排布在电路板上的各个差分线对的预设对 地阻抗和预设隔离度，每对所述差分线对均包括第一差分线和第二差 分线；
决策模块， 用于调整所述第一差分线的线宽及厚度， 所述第二差 分线的线宽及厚度， 所述第一差分线与所述第二差分线之间的中心 距， 以及各个所述差分线对与所述电路板的地平面之间的距离， 以调 整各个所述差分线对的对地阻抗； 所述决策模块， 还用于调整各个所述差分线对的长度， 以及相邻 的所述差分线对之间的中心距， 以调整各个所述差分线对的隔离度； 执行模块，用于当各个所述差分线对的对地阻抗为所述预设对地 阻抗， 且各个所述差分线对的隔离度为所述预设隔离度时， 以调整后 的所述第一差分线的线宽及厚度， 所述第二差分线的线宽及厚度， 所 述第一差分线与所述第二差分线之间的中心距，各个所述差分线对与 所述电路板的地平面之间的距离， 各个所述差分线对的长度， 以及相 邻的所述差分线对之间的中心距，在所述电路板的预设位置上排布各 个所述差分线对。 在第一种可能的实现方式中， 根据第二方面， 具体实现为： 所述 差分线对的预设对地阻抗在 45欧姆至 75欧姆的范围内。
在第二种可能的实现方式中，结合第二方面或第一种可能的实现 方式， 具体实现为： 所述差分线对的预设对地阻抗具体为 50欧姆或 者 67. 5欧姆。 在第三种可能的实现方式中，结合第二方面或第一种可能的实现 方式或第二种可能的实现方式， 具体实现为： 所述差分线对的预设隔 离度的在 10分贝至 -60分贝的范围内。 在第四种可能的实现方式中，结合第二方面或第一种可能的实现 方式至第三种可能的实现方式， 具体实现为： 所述差分线对的预设隔 离度具体为 -40分贝。 本发明实施例所提供的一种模拟线缆自串扰的方法及装置，通过 获取需排布在电路板上的各个差分线对的预设对地阻抗和预设隔离 度， 每对差分线对均包括第一差分线和第二差分线， 并且调整第一差 分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与第二差 分线之间的中心距， 以及各个差分线对与电路板的地平面之间的距 离， 以调整各个所述差分线对的对地阻抗， 以及调整各个差分线对的 长度， 以及相邻的差分线对之间的中心距， 以调整各个所述差分线对 的隔离度， 当各个差分线对的对地阻抗为预设对地阻抗， 且各个差分 线对的隔离度为预设隔离度时， 以调整后的第一差分线的线宽及厚 度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心 距， 各个差分线对与电路板的地平面之间的距离， 各个差分线对的长 度， 以及相邻的差分线对之间的中心距， 在电路板的预设位置上排布 各个差分线对。 通过该方案， 由于通过各个差分线对的预设对地阻抗 和预设隔离度， 确定出第一差分线的线宽及厚度， 第二差分线的线宽 及厚度， 第一差分线与第二差分线之间的中心距， 各个差分线对与电 路板的地平面之间的距离， 各个差分线对的长度， 以及相邻的差分线 对之间的中心距， 并在电路板的预设位置上排布各个差分线对， 模拟 了双绞线线缆内自串扰的模型， 大大简化了双绞线自串扰矩阵电路的 模型， 进而提升了电路的运算速度。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案，下面 将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而 易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域 普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些 附图获得其他的附图。 图 1 为本发明实施例提供的模拟线缆自串扰的方法的流程示意 图一；
图 2为本发明实施例提供的差分线对的结构示意图一； 图 3为本发明实施例提供的差分线对的结构示意图二； 图 4 为本发明实施例提供的模拟线缆自串扰的方法的流程示意 图二； 图 5为本发明实施例提供的差分线对的排布示意图一； 图 6为本发明实施例提供的差分线对的模块划分示意图一； 图 7为本发明实施例提供的差分线对的区域划分示意图一； 图 8为本发明实施例提供的差分线对的排布示意图二； 图 9为本发明实施例提供的差分线对的排布示意图三； 图 1 0为本发明实施例提供的差分线对的排布示意图四； 图 1 1为本发明实施例提供的差分线对的模块划分示意图二； 图 1 2为本发明实施例提供的差分线对的区域划分示意图二； 图 1 3为本发明实施例提供的差分线对的排布示意图五； 图 14为本发明实施例提供的差分线对的排布示意图六； 图 1 5为本发明实施例提供的模拟线缆自串扰的装置的结构示意 图。
具体实施方式 下面将结合本发明实施例中的附图，对本发明实施例中的技术方 案进行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部 分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普 通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
本发明实施例提供一种模拟线缆自串扰的方法， 如图 1所示， 该 方法包括：
S 1 01、模拟线缆自串扰的装置获取需排布在电路板上的各个差分 线对的预设对地阻抗和预设隔离度，每对差分线对均包括第一差分线 和第二差分线。
其中， DSL接入复用器的实线线缆仿真系统主要包含两部分： 线 路衰减模块和线路自串扰模块， 其中， 线路自串扰模块是以串联的方 式和 DSL接入复用器的线路衰减模块相连接的。本发明实施例所提供 的一种模拟线缆自串扰的方法正是应用于 DSL接入复用器的线路自串 扰模块中， 通过模拟各个差分线对之间的位置关系， 高仿真度地模拟 了实线线缆内部的自串扰关系。
可以理解的是， 每一对差分线对都是由两条相同的差分线组成 的， 两条差分线分别传输两个等值反相的信号， 例如， 一对差分线的 基准电压为 0伏特， 差分线所传输的电压的伏值为 2伏特， 则两条差 分线分别传输的电压的伏值为 +1伏特和 -1伏特； 或者， 一对差分线 的基准电压为 3伏特， 差分线所传输的电压的伏值为 4伏特， 则两条 差分线分别传输的电压的伏值为 +5伏特和 +1伏特。 本发明实施例所提供的一种模拟线缆自串扰的方法，模拟线缆自 串扰的装置首先获取需排布在电路板上的各个差分线对的预设对地 阻抗和预设隔离度， 每对差分线对均包括第一差分线和第二差分线。
S 1 02、模拟线缆自串扰的装置调整第一差分线的线宽及厚度， 第 二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心距， 以 及各个差分线对与电路板的地平面之间的距离，以调整各个差分线对 的对地阻抗。 模拟线缆自串扰的装置获取到需排布在电路板上的各个差分线 对的预设对地阻抗和预设隔离度后，模拟线缆自串扰的装置需要调整 第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与 第二差分线之间的中心距，以及各个差分线对与电路板的地平面之间 的距离， 以调整各个差分线对的对地阻抗。 其中， 电路板的地平面是 指电路板上与地面电位相等的平面，该电路板的地平面可以为电路板 的下表面。
如图 2所示，为每对差分线对所包括的各个差分线之间的位置关 系， 每对差分线对均包括第一差分线 01和第二差分线 02 , 第一差分 线 01的线宽为 D1 , 第一差分线 01的厚度为 T 1 , 第二差分线 02的线 宽为 D2 , 第二差分线 02的厚度为 T2 , 第一差分线 01与第二差分线 02之间的中心距为 S 1 ,差分线对与电路板的地平面 03之间的距离为 H l。 根据模拟线缆自串扰的装置获取的预设对地阻抗， 调整第一差分 线 01的线宽 D1及厚度 T1 , 第二差分线 02的线宽 D2及厚度 T2 , 第 一差分线 01 与第二差分线 02之间的中心距 S 1 , 以及各个差分线对 与电路板的地平面 03之间的距离 H I , 其中， 由于第一差分线 01 和 第二差分线 02完全相同， 则第一差分线 01的线宽 D1与第二差分线 02的线宽 D2相等， 第一差分线 01 的厚度 T1和第二差分线 02的厚 度 T2相等。 需要说明的是，由于一对差分线的第一差分线 01的线宽 D1及厚 度 T1, 第二差分线 02的线宽 D2及厚度 T2, 第一差分线 01与第二差 分线 02 之间的中心距 S1, 以及各个差分线对与电路板的地平面 03 之间的距离 HI共同对应一个差分线对的对地阻抗， 则第一差分线 01 的线宽 D1及厚度 T1, 第二差分线 02的线宽 D2及厚度 T2, 第一差分 线 01 与第二差分线 02之间的中心距 S1, 以及各个差分线对与电路 板的地平面 03之间的距离 HI可以存在多种组合方式，只要能够使差 分线对的对地阻抗满足预设对地阻抗的值即可。 其中， 第一差分线 01 与第二差分线 02之间的中心距 S1 以及差分线对与电路板的地平 面 03之间的距离 HI 与差分线对的对地阻抗成正比； 第一差分线 01 的线宽 D1, 第二差分线 02的线宽 D2, 第一差分线 01的厚度 T1和第 第二差分线 02的厚度与差分线对的对地阻抗成反比。 S103、模拟线缆自串扰的装置调整各个差分线对的长度， 以及相 邻的差分线对之间的中心距， 以调整各个差分线对的隔离度。 模拟线缆自串扰的装置获取到需排布在电路板上的各个差分线 对的预设对地阻抗和预设隔离度后，模拟线缆自串扰的装置需要调整 各个差分线对的长度， 以及相邻的差分线对之间的中心距， 以调整各 个差分线对的隔离度。
示例性的， 如图 3所示， 为四对差分线对之间的位置关系的截面 图， 第一差分线对 1与第二差分线对 2, 以及第三差分线对 3相邻， 第二差分线对 2与第一差分线对 1, 以及第四差分线对 4相邻， 第三 差分线对 3与第一差分线对 1, 以及第四差分线对 4相邻， 第四差分 线对与第二差分线对 2, 以及第三差分线对 3相邻， 因此相邻的差分 线对之间的中心距可以指示位于同一层的相邻的差分线对之间的中 心距 S2, 例如第一差分线对 1 与第二差分线对 2之间的中心距， 也 可以指示位于不同层的相邻的差分线对之间的中心距 S3, 例如第一 差分线对 1与第三差分线对 3之间的中心距，还可以指示位于不同层 的相邻的差分线对之间的高度中心距 H2, 例如第二差分线对 2 与第 四差分线对 4之间的高度中心距。根据模拟线缆自串扰的装置获取的 预设隔离度， 调整位于同一层的相邻的差分线对之间的中心距 S2 , 位于不同层的相邻的差分线对之间的中心距 S 3 , 位于不同层的相邻 的差分线对之间的高度中心距 H2 , 以及差分线对的长度 L (图中未画 出） 。
需要说明的是，由于位于同一层的相邻的差分线对之间的中心距
S2 , 位于不同层的相邻的差分线对之间的中心距 S 3 , 位于不同层的 相邻的差分线对之间的高度中心距 H2 , 以及差分线对的长度 L共同 对应差分线的隔离度，则位于同一层的相邻的差分线对之间的中心距 S2 , 位于不同层的相邻的差分线对之间的中心距 S 3 , 位于不同层的 相邻的差分线对之间的高度中心距 H2 可以有多种组合， 只要能够满 足使差分线对的隔离度满足预设隔离度的值即可。
其中， S 102和 S 103之间没有时间顺序的限制。
线对的隔离度为预设隔离度时， 以调整后的第一差分线的线宽及厚 度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心 距， 各个差分线对与电路板的地平面之间的距离， 各个差分线对的长 度， 以及相邻的差分线对之间的中心距， 模拟线缆自串扰的装置在电 路板的预设位置上排布各个差分线对。 通过模拟线缆自串扰的装置获取到需排布在电路板上的各个差 分线对的预设对地阻抗和预设隔离度后，调整第一差分线的线宽及厚 度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心 距， 各个差分线对与电路板的地平面之间的距离， 各个差分线对的长 度， 以及相邻的差分线对之间的中心距， 当各个差分线对的对地阻抗 为预设对地阻抗， 且各个差分线对的隔离度为预设隔离度时， 根据调 整后的第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差 分线与第二差分线之间的中心距，各个差分线对与电路板的地平面之 间的距离，各个差分线对的长度，以及相邻的差分线对之间的中心距， 模拟线缆自串扰的装置在电路板的预设位置上排布各个差分线对。
具体的，模拟线缆自串扰的装置如何在电路板的预设位置上排布
本发明实施例所提供的一种模拟线缆自串扰的方法，通过获取需 排布在电路板上的各个差分线对的预设对地阻抗和预设隔离度，每对 差分线对均包括第一差分线和第二差分线，并且调整第一差分线的线 宽及厚度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间 各个差分线对的对地阻抗， 以及调整各个差分线对的长度， 以及相邻 的差分线对之间的中心距， 以调整各个差分线对的隔离度， 当各个差 分线对的对地阻抗为预设对地阻抗，且各个差分线对的隔离度为预设 隔离度时， 以调整后的第一差分线的线宽及厚度， 第二差分线的线宽 及厚度， 第一差分线与第二差分线之间的中心距， 各个差分线对与电 路板的地平面之间的距离， 各个差分线对的长度， 以及相邻的差分线 对之间的中心距， 在电路板的预设位置上排布各个差分线对。 通过该 方案， 由于通过各个差分线对的预设对地阻抗和预设隔离度， 确定出 第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与 第二差分线之间的中心距，各个差分线对与电路板的地平面之间的距 离， 各个差分线对的长度， 以及相邻的差分线对之间的中心距， 并在 电路板的预设位置上排布各个差分线对，模拟了双绞线线缆内自串扰 的模型， 大大简化了双绞线自串扰矩阵电路的模型， 进而提升了电路 的运算速度。
本发明实施例提供一种模拟线缆自串扰的方法， 如图 4所示， 该 方法包括：
S 2 01、模拟线缆自串扰的装置获取需排布在电路板上的各个差分 线对的预设对地阻抗和预设隔离度，每对差分线对均包括第一差分线 和第二差分线。
其中， DSL接入复用器的实线线缆仿真系统主要包含两部分： 线 路衰减模块和线路自串扰模块，其中线路自串扰模块是以串联的方式 和 DSL接入复用器的线路衰减模块相连接的。本发明实施例所提供的 一种模拟线缆自串扰的方法正是应用于 DSL接入复用器的线路自串扰 模块中， 通过模拟各个差分线对之间的位置关系， 高仿真度地模拟了 实线线缆内部的自串扰关系。
可以理解的是， 每一对差分线对都是由两条相同的差分线组成 的， 两条差分线分别传输两个等值反相的信号， 例如， 一对差分线的 基准电压为 0伏特， 差分线所传输的电压的伏值为 2伏特， 则两条差 分线分别传输的电压的伏值为 +1伏特和 -1伏特； 或者， 一对差分线 的基准电压为 3伏特， 差分线所传输的电压的伏值为 4伏特， 则两条 差分线分别传输的电压的伏值为 +5伏特和 +1伏特。 需要说明的是，差分线的特征阻抗的取值为差分线对的预设对低 阻抗的 1倍， 因此差分线的特征阻抗在 90欧姆至 150欧姆的范围内。 具体的， 差分线的特征阻抗为 100欧姆或者 1 35欧姆。 本发明实施例所提供的一种模拟线缆自串扰的方法，模拟线缆自 串扰的装置首先获取需排布在电路板上的各个差分线对的预设对地 阻抗和预设隔离度， 每对差分线对均包括第一差分线和第二差分线。
5202、 差分线对的预设对地阻抗在 45欧姆至 75欧姆的范围内。 具体的， 差分线对的预设对地为 50欧姆或者 67. 5欧姆。
5203、 差分线对的预设隔离度的在 10分贝至 -60分贝的范围内。 具体的， 差分线对的预设隔离度为 -40分贝。 S204、模拟线缆自串扰的装置调整第一差分线的线宽及厚度， 第 二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心距， 以 及各个差分线对与电路板的地平面之间的距离，以调整各个差分线对 的对地阻抗。 下面，对模拟线缆自串扰的装置如何调整第一差分线的线宽及厚 度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心 距， 以及各个差分线对与电路板的地平面之间的距离进行说明。 模拟线缆自串扰的装置获取到需排布在电路板上的各个差分线 对的预设对地阻抗和预设隔离度后，模拟线缆自串扰的装置需要调整 第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与 第二差分线之间的中心距，以及各个差分线对与电路板的地平面之间 的距离， 以调整各个差分线对的对地阻抗。 其中， 电路板的地平面是 指电路板上与地面电位相等的平面，该电路板的地平面可以为电路板 的下表面。
如图 2所示，为每对差分线对所包括的各个差分线之间的位置关 系， 每对差分线对均包括第一差分线 01和第二差分线 02, 第一差分 线 01的线宽为 D1, 第一差分线 01的厚度为 T1, 第二差分线 02的线 宽为 D2, 第二差分线 02的厚度为 T2, 第一差分线 01与第二差分线 02之间的中心距为 S1,差分线对与电路板的地平面 03之间的距离为 Hl。 根据模拟线缆自串扰的装置获取的预设对地阻抗， 调整第一差分 线 01的线宽 D1及厚度 T1, 第二差分线 02的线宽 D2及厚度 T2, 第 一差分线 01 与第二差分线 02之间的中心距 S1, 以及各个差分线对 与电路板的地平面 03之间的距离 HI, 其中， 由于第一差分线 01 和 第二差分线 02完全相同， 则第一差分线 01的线宽 D1与第二差分线 02的线宽 D2相等， 第一差分线 01 的厚度 T1和第二差分线 02的厚 度 T2相等。 需要说明的是，由于一对差分线的第一差分线 01的线宽 D1及厚 度 T1, 第二差分线 02的线宽 D2及厚度 T2, 第一差分线 01与第二差 分线 02 之间的中心距 S1, 以及各个差分线对与电路板的地平面 03 之间的距离 HI共同对应一个差分线对的对地阻抗， 则第一差分线 01 的线宽 D1及厚度 T1, 第二差分线 02的线宽 D2及厚度 T2, 第一差分 线 01 与第二差分线 02之间的中心距 S1, 以及各个差分线对与电路 板的地平面 03之间的距离 HI可以存在多种组合方式，只要能够使差 分线对的对地阻抗满足预设对地阻抗的值即可。 其中， 第一差分线 01 与第二差分线 02之间的中心距 S1 以及差分线对与电路板的地平 面 03之间的距离 HI 与差分线对的对地阻抗成正比； 第一差分线 01 的线宽 D1, 第二差分线 02的线宽 D2, 第一差分线 01的厚度 T1和第 第二差分线 02的厚度与差分线对的对地阻抗成反比。
S205、模拟线缆自串扰的装置调整各个差分线对的长度， 以及相 邻的差分线对之间的中心距， 以调整各个差分线对的隔离度。 下面， 对模拟线缆自串扰的装置如何调整各个差分线对的长度， 以及相邻的差分线对之间的中心距进行说明。 模拟线缆自串扰的装置获取到需排布在电路板上的各个差分线 对的预设对地阻抗和预设隔离度后，模拟线缆自串扰的装置需要调整 各个差分线对的长度， 以及相邻的差分线对之间的中心距， 以调整各 个差分线对的隔离度。 示例性的， 如图 3所示， 为四对差分线对之间的位置关系的截面 图， 第一差分线对 1与第二差分线对 2, 以及第三差分线对 3相邻， 第二差分线对 2与第一差分线对 1, 以及第四差分线对 4相邻， 第三 差分线对 3与第一差分线对 1, 以及第四差分线对 4相邻， 第四差分 线对与第二差分线对 2, 以及第三差分线对 3相邻， 因此相邻的差分 线对之间的中心距可以指示位于同一层的相邻的差分线对之间的中 心距 S2, 例如第一差分线对 1 与第二差分线对 2之间的中心距， 也 可以指示位于不同层的相邻的差分线对之间的中心距 S3, 例如第一 差分线对 1与第三差分线对 3之间的中心距，还可以指示位于不同层 的相邻的差分线对之间的高度中心距 H2, 例如第二差分线对 2 与第 四差分线对 4之间的高度中心距。根据模拟线缆自串扰的装置获取的 预设隔离度， 调整位于同一层的相邻的差分线对之间的中心距 S2, 位于不同层的相邻的差分线对之间的中心距 S3, 位于不同层的相邻 的差分线对之间的高度中心距 H2, 以及差分线对的长度 L (图中未画 出） 。 需要说明的是，由于位于同一层的相邻的差分线对之间的中心距 S2, 位于不同层的相邻的差分线对之间的中心距 S3, 位于不同层的 相邻的差分线对之间的高度中心距 H2, 以及差分线对的长度 L共同 对应差分线的隔离度，则位于同一层的相邻的差分线对之间的中心距 S2, 位于不同层的相邻的差分线对之间的中心距 S3, 位于不同层的 相邻的差分线对之间的高度中心距 H2可以有多种组合， 只要能够满 足使差分线对的隔离度满足预设隔离度的值即可。
其中， S204和 S205之间没有时间顺序的限制。
线对的隔离度为预设隔离度时， 以调整后的第一差分线的线宽及厚 度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心 距， 各个差分线对与电路板的地平面之间的距离， 各个差分线对的长 度， 以及相邻的差分线对之间的中心距， 模拟线缆自串扰的装置在电 路板的预设位置上排布各个差分线对。 通过模拟线缆自串扰的装置获取到需排布在电路板上的各个差 分线对的预设对地阻抗和预设隔离度后，调整第一差分线的线宽及厚 度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心 距， 各个差分线对与电路板的地平面之间的距离， 各个差分线对的长 度， 以及相邻的差分线对之间的中心距， 当各个差分线对的对地阻抗 为预设对地阻抗， 且各个差分线对的隔离度为预设隔离度时， 根据调 整后的第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差 分线与第二差分线之间的中心距，各个差分线对与电路板的地平面之 间的距离，各个差分线对的长度，以及相邻的差分线对之间的中心距， 模拟线缆自串扰的装置在电路板的预设位置上排布各个差分线对。
若共有 M对差分线对，要在电路板的预设位置上排布该 M对差分 线对。 印制电路板是由很多层电路板压制而成的， 模拟线缆自串扰的 装置将 M对差分线对分别分布于 N 层电路板上， 每层电路板上分布 M/N对差分线对， 其中， M为正整数， N为正整数， M/N为正整数， 每 对差分线对的第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心距，各个差分线对与电路板的地 平面之间的距离， 各个差分线对的长度， 以及相邻的差分线对之间的 中心距已经调整到使各个差分线对的对地阻抗为预设对地阻抗，且各 个差分线对的隔离度为预设隔离度。
将 M对差分线对分为 X个模块， X个模块分别为 Al、 A2
AX。 差分线对距离 L1 内维持某个状态， 当差分线对经过距离 L1时，
M对差分线对的位置发生变化。 将 Al、 A2 AX模块内的差分 线对分成 Y个区域， Y个区域分别为 Bl、 B2 BY。 Bl、 B2
BY 按照顺时针的方向调整差分线对的位置关系， 同时， 模块 Al、 A2 AX 也按照顺时针的方向调整差分线对的位置关系， 其中 模块 Al、 A2 AX与区域 Bl、 B2 BY均沿着同一个方向 调整差分线对的位置关系。
需要说明的是， 本发明实施例所提供的模拟线缆自串扰的方法， 模块 Al、 A2 AX与区域 Bl、 B2 BY可以沿着顺时针方 向调整差分线对的位置关系，也可以沿着逆时针的方向调整差分线对 的位置关系， 本发明不做限制。
当差分线对经过距离 L1时， M对差分线对的位置又会发生变化。 重新划分 Al、 A2 AX模块内的差分线对， Y个区域分别为 Bl、
B2 BY。 Bl、 B2 BY 按照顺时针的方向调整差分线对 的位置关系， 同时， 模块 Al、 A2 AX也按照顺时针的方向调 整差分线对的位置关系， 其中模块 Al、 A2 AX 与区域 Bl、 B2 BY均沿着同一个方向调整差分线对的位置关系。 因此， 当差分线对每经过距离 L1 时， M对差分线对的位置发生 而达到模拟线缆自串扰的目的。变化的过程上述实施例已进行了详细 的描述， 此处不再赘述。 需要补充的是，本发明实施例提供的在电路板的预设位置上排布 电路板的预设位置上排布各个差分线对， 能够满足任意一对差分线对 与其余的差分线对产生串扰的条件，都可以达到模拟线缆自串扰的目 的， 本发明不做限制。
示例性的， 若共有 100对差分线对， 要在电路板的预设位置上排 布该 100对差分线对， 100对差分线对在空间某一处的位置关系的截 面图如图 5所示（方框内的数字 1、 2 ... ... 100分别代表差分线对的序 号）。 印制电路板是由很多层电路板压制而成的， 模拟线缆自串扰的 装置将 100对差分线对分别分布于 1 0层电路板上， 每层电路板上分 布 10对差分线对， 其中， 每对差分线对的第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心距， 各个差分线对与电路板的地平面之间的距离， 各个差分线对的长度， 以及相邻的差分线对之间的中心距已经调整到使各个差分线对的对 地阻抗为预设对地阻抗， 且各个差分线对的隔离度为预设隔离度。
如图 6所示， 将 100对差分线对分为 4个 5 * 5模块， 4个模块分 别为 Al、 A2、 A3和 A4。 差分线对保持如图 6所示的状态经过距离 L 1 时， 100对差分线 对的位置发生变化。 将 Al、 A2、 A3和 A4模块内的差分线对分成 5个 区域， 5个区域分别为 Bl、 B2、 B 3、 B4和 B5 , 以 A1模块为例， 如图 7所示， 区域 B1 包括差分线对 1、 1、 3、 1 1、 12和 1 3 , 区域 B2包括 差分线对 4、 5、 14、 15、 24和 25 , 区域 B 3包括差分线对 33、 34、 35、 43、 44和 45 , 区域 B4包括差分线对 21、 22、 31、 32、 41和 42 , 区域 B5包括差分线对 23。 如图 8所示， 以中心区域 B5为中心， Bl、 B2、 B3和 B4按照顺时针的方向调整差分线对的位置关系， 同时， 模 块 Al、 A2、 A3和 A4也按照顺时针的方向调整差分线对的位置关系， 其中模块 Al、 A2、 A3和 A4与区域 Bl、 B2、 B3、 B4和 B5均沿着同一 个方向调整差分线对的位置关系。
需要说明的是， 本发明实施例所提供的模拟线缆自串扰的方法， 模块 Al、 A2、 A3和 A4与区域 Bl、 B2、 B3、 B4和 B5可以沿着顺时针 方向调整差分线对的位置关系，也可以沿着逆时针的方向调整差分线 对的位置关系， 本发明不做限制。
当差分线对保持如图 8所示的状态经过距离 L1 时， 100对差分 线对的位置又会发生变化。 重新划分 Al、 A2、 A3和 A4模块内的差分 线对， 5个区域分别为 Bl、 B2、 B 3、 B4和 B5。 如图 9所示， 以中心 区域 B5为中心， Bl、 B2、 B3和 B4按照顺时针的方向调整差分线对 的位置关系， 同时， 模块 A l、 A2、 A3和 A4也按照顺时针的方向调整 差分线对的位置关系， 其中模块 Al、 A2、 A3和 A4与区域 Bl、 B2、 B3、 B4和 B5均沿着同一个方向调整差分线对的位置关系。
因此， 当差分线对每经过距离 L1 时， 100对差分线对的位置发 生一次变化， 以使得任意一对差分线对与其余的差分线对产生串扰， 进而达到模拟线缆自串扰的目的。变化的过程上述实施例已进行了详 细的描述， 此处不再赘述。 示例性的， 若共有 54对差分线对， 要在电路板的预设位置上排 布该 54对差分线对， 54对差分线对在空间某一处的位置关系的截面 图如图 10所示（方框内的数字 1、2 ... ... 54分别代表差分线对的序号）。 印制电路板是由很多层电路板压制而成的，模拟线缆自串扰的装置将 54对差分线对分别分布于 6层电路板上， 每层电路板上分布 9对差 分线对， 其中， 每对差分线对的第一差分线的线宽及厚度， 第二差分 线的线宽及厚度， 第一差分线与第二差分线之间的中心距， 各个差分 线对与电路板的地平面之间的距离， 各个差分线对的长度， 以及相邻 的差分线对之间的中心距已经调整到使各个差分线对的对地阻抗为 预设对地阻抗， 且各个差分线对的隔离度为预设隔离度。 如图 11所示， 将 54对差分线对分为 6个 3*3模块， 6个模块分 别为 Al、 A2、 A3、 A4、 A5和 A6。 差分线对保持如图 11所示的状态经过距离 L1时， 100对差分线 对的位置发生变化。 将 Al、 A2、 A3、 A4、 A5和 A6模块内的差分线对 分成 5个区域， 5个区域分别为 Bl、 B2、 B3、 B4和 B5, 以 A1模块为 例， 如图 12所示， 区域 B1 包括差分线对 1和 2, 区域 B2 包括差分 线对 2和 12, 区域 B3包括差分线对 20和 21, 区域 B4包括差分线对 10和 19, 区域 B5 包括差分线对 11。 如图 13所示， 以中心区域 B5 为中心， Bl、 B2、 B3和 B4按照顺时针的方向调整差分线对的位置关 系， 同时， 模块 Al、 A2、 A3、 A4、 A5和 A6也按照顺时针的方向调整 差分线对的位置关系， 其中模块 Al、 A2、 A3、 A4、 A5 和 A6 与区域 Bl、 B2、 B3、 B4和 B5均沿着同一个方向调整差分线对的位置关系。 需要说明的是， 本发明实施例所提供的模拟线缆自串扰的方法， 模块 Al、 A2、 A3、 A4、 A5和 A6与区域 Bl、 B2、 B3、 B4和 B5可以沿 着顺时针方向调整差分线对的位置关系，也可以沿着逆时针的方向调 整差分线对的位置关系， 本发明不做限制。
当差分线对保持如图 13所示的状态经过距离 L1 时， 54对差分 线对的位置又会发生变化。 重新划分 Al、 A2、 A3、 A4、 A5和 A6模块 内的差分线对， 5个区域分别为 Bl、 B2、 B3、 B4和 B5。 如图 14所示， 以中心区域 B5为中心， Bl、 B2、 B3和 B4按照顺时针的方向调整差 分线对的位置关系， 同时， 模块 Al、 A2、 A3、 A4、 A5和 A6也按照顺 时针的方向调整差分线对的位置关系， 其中模块 Al、 A2、 A3、 A4、 A5和 A6与区域 Bl、 B2、 B3、 B4和 B5均沿着同一个方向调整差分线 对的位置关系。
因此， 当差分线对每经过距离 L1时， 54对差分线对的位置发生 而达到模拟线缆自串扰的目的。变化的过程上述实施例已进行了详细 的描述， 此处不再赘述。 本发明实施例所提供的一种模拟线缆自串扰的方法，通过获取需 排布在电路板上的各个差分线对的预设对地阻抗和预设隔离度，每对 差分线对均包括第一差分线和第二差分线，并且调整第一差分线的线 宽及厚度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间 各个差分线对的对地阻抗， 以及调整各个差分线对的长度， 以及相邻 的差分线对之间的中心距， 以调整各个差分线对的隔离度， 当各个差 分线对的对地阻抗为预设对地阻抗，且各个差分线对的隔离度为预设 隔离度时， 以调整后的第一差分线的线宽及厚度， 第二差分线的线宽 及厚度， 第一差分线与第二差分线之间的中心距， 各个差分线对与电 路板的地平面之间的距离， 各个差分线对的长度， 以及相邻的差分线 对之间的中心距， 在电路板的预设位置上排布各个差分线对。 通过该 方案， 由于通过各个差分线对的预设对地阻抗和预设隔离度， 确定出 第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与 第二差分线之间的中心距，各个差分线对与电路板的地平面之间的距 离， 各个差分线对的长度， 以及相邻的差分线对之间的中心距， 并在 电路板的预设位置上排布各个差分线对，模拟了双绞线线缆内自串扰 的模型， 大大简化了双绞线自串扰矩阵电路的模型， 进而提升了电路 的运算速度。
本发明实施例提供一种模拟线缆自串扰的装置 8 , 如图 1 5所示， 该装置包括：
获取模块 8 0 , 用于获取需排布在电路板上的各个差分线对的预 设对地阻抗和预设隔离度，每对差分线对均包括第一差分线和第二差 分线；
决策模块 8 1 , 用于调整第一差分线的线宽及厚度， 第二差分线 的线宽及厚度， 第一差分线与第二差分线之间的中心距， 以及各个差 分线对与电路板的地平面之间的距离，以调整各个差分线对的对地阻 抗；
决策模块 8 1 , 还用于调整各个差分线对的长度， 以及相邻的差 分线对之间的中心距， 以调整各个差分线对的隔离度；
执行模块 82 , 用于当各个差分线对的对地阻抗为预设对地阻抗， 且各个差分线对的隔离度为预设隔离度时，以调整后的第一差分线的 线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之 间的中心距， 各个差分线对与电路板的地平面之间的距离， 各个差分 线对的长度， 以及相邻的差分线对之间的中心距， 在电路板的预设位 置上排布各个差分线对。
进一步地，差分线对的预设对地阻抗在 45欧姆至 75欧姆的范围 内。
具体的， 差分线对的预设对地阻抗为 50欧姆或者 67. 5欧姆。 进一步地， 差分线对的预设隔离度的在 10分贝至 -60分贝的范 围内。
具体的， 差分线对的预设隔离度为 -40分贝。 本发明实施例所提供的一种模拟线缆自串扰的装置，该装置包括 抗和预设隔离度， 每对差分线对均包括第一差分线和第二差分线， 决 策模块， 用于调整第一差分线的线宽及厚度， 第二差分线的线宽及厚 度， 第一差分线与第二差分线之间的中心距， 以及各个差分线对与电 路板的地平面之间的距离， 以调整各个差分线对的对地阻抗， 决策模 块， 还用于调整各个差分线对的长度， 以及相邻的差分线对之间的中 心距， 以调整各个差分线对的隔离度， 以及执行模块， 用于当各个差 分线对的对地阻抗为预设对地阻抗，且各个差分线对的隔离度为预设 隔离度时， 以调整后的第一差分线的线宽及厚度， 第二差分线的线宽 及厚度， 第一差分线与第二差分线之间的中心距， 各个差分线对与电 路板的地平面之间的距离， 各个差分线对的长度， 以及相邻的差分线 对之间的中心距， 在电路板的预设位置上排布各个差分线对。 通过该 方案， 由于通过各个差分线对的预设对地阻抗和预设隔离度， 确定出 第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分线与 第二差分线之间的中心距，各个差分线对与电路板的地平面之间的距 离， 各个差分线对的长度， 以及相邻的差分线对之间的中心距， 并在 电路板的预设位置上排布各个差分线对，模拟了双绞线线缆内自串扰 的模型， 大大简化了双绞线自串扰矩阵电路的模型， 进而提升了电路 的运算速度。
本发明实施例提供一种模拟线缆自串扰的装置， 该装置包括： 处理器，用于获取需排布在电路板上的各个差分线对的预设对地 阻抗和预设隔离度， 每对差分线对均包括第一差分线和第二差分线， 并且， 调整第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第 一差分线与第二差分线之间的中心距，以及各个差分线对与电路板的 地平面之间的距离， 以调整各个差分线对的对地阻抗， 调整各个差分 线对的长度， 以及相邻的差分线对之间的中心距， 以调整各个差分线 分线对的隔离度为预设隔离度时，以调整后的第一差分线的线宽及厚 度， 第二差分线的线宽及厚度， 第一差分线与第二差分线之间的中心 距， 各个差分线对与电路板的地平面之间的距离， 各个差分线对的长 度， 以及相邻的差分线对之间的中心距， 在电路板的预设位置上排布 各个差分线对。 本发明实施例还提供一种电路板， 该电路板包括：
设置于电路板的预设位置上的各个差分线对， 其中， 差分线对是 根据第一差分线的线宽及厚度， 第二差分线的线宽及厚度， 第一差分 线与第二差分线之间的中心距，各个差分线对与电路板的地平面之间 的距离， 各个差分线对的长度， 以及相邻的差分线对之间的中心距排 布在电路板上的， 第一差分线的线宽及厚度， 第二差分线的线宽及厚 度， 第一差分线与第二差分线之间的中心距， 以及各个差分线对与电 路板的地平面之间的距离， 各个差分线对的长度， 以及相邻的差分线 对之间的中心距均为调整后的距离。 本领域普通技术人员可以理解：实现上述方法实施例的全部或部 分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于 一计算机可读取存储介质中， 该程序在执行时， 执行包括上述方法实 施例的步骤； 而前述的存储介质包括： R0M、 RAM, 磁碟或者光盘等各 种可以存储程序代码的介质。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并 不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范 围内， 可轻易想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围应以所述权利要求的保护范围为准。

Claims

权利要求
1、 一种模拟线缆自串扰的方法， 其特征在于， 包括：
获取需排布在电路板上的各个差分线对的预设对地阻抗和预设 隔离度， 每对所述差分线对均包括第一差分线和第二差分线；
调整所述第一差分线的线宽及厚度，所述第二差分线的线宽及厚 度， 所述第一差分线与所述第二差分线之间的中心距， 以及各个所述 差分线对与所述电路板的地平面之间的距离，以调整各个所述差分线 对的对地阻抗；
调整各个所述差分线对的长度，以及相邻的所述差分线对之间的 中心距， 以调整各个所述差分线对的隔离度；
当各个所述差分线对的对地阻抗为所述预设对地阻抗，且各个所 述差分线对的隔离度为所述预设隔离度时，以调整后的所述第一差分 线的线宽及厚度， 所述第二差分线的线宽及厚度， 所述第一差分线与 所述第二差分线之间的中心距，各个所述差分线对与所述电路板的地 平面之间的距离， 各个所述差分线对的长度， 以及相邻的所述差分线 对之间的中心距， 在所述电路板的预设位置上排布各个所述差分线 对。
2、根据权利要求 1所述的模拟线缆自串扰的方法， 其特征在于， 所述差分线对的预设对地阻抗在 45欧姆至 75欧姆的范围内。
3、根据权利要求 2所述的模拟线缆自串扰的方法， 其特征在于， 所述差分线对的预设对地阻抗具体为 5 0欧姆或者 67. 5欧姆。
4、根据权利要求 1所述的模拟线缆自串扰的方法， 其特征在于， 所述差分线对的预设隔离度的在 1 0分贝至 -60分贝的范围内。
5、根据权利要求 4所述的模拟线缆自串扰的方法， 其特征在于， 所述差分线对的预设隔离度具体为 -4 0分贝。
6、 一种模拟线缆自串扰的装置， 其特征在于， 包括：
获取模块，用于获取需排布在电路板上的各个差分线对的预设对 地阻抗和预设隔离度，每对所述差分线对均包括第一差分线和第二差 分线；
决策模块， 用于调整所述第一差分线的线宽及厚度， 所述第二差 分线的线宽及厚度， 所述第一差分线与所述第二差分线之间的中心 距， 以及各个所述差分线对与所述电路板的地平面之间的距离， 以调 整各个所述差分线对的对地阻抗；
所述决策模块， 还用于调整各个所述差分线对的长度， 以及相邻 的所述差分线对之间的中心距， 以调整各个所述差分线对的隔离度； 执行模块，用于当各个所述差分线对的对地阻抗为所述预设对地 阻抗， 且各个所述差分线对的隔离度为所述预设隔离度时， 以调整后 的所述第一差分线的线宽及厚度， 所述第二差分线的线宽及厚度， 所 述第一差分线与所述第二差分线之间的中心距，各个所述差分线对与 所述电路板的地平面之间的距离， 各个所述差分线对的长度， 以及相 邻的所述差分线对之间的中心距，在所述电路板的预设位置上排布各 个所述差分线对。
7、根据权利要求 6所述的模拟线缆自串扰的装置， 其特征在于， 所述差分线对的预设对地阻抗在 45欧姆至 75欧姆的范围内。
8、根据权利要求 7所述的模拟线缆自串扰的装置， 其特征在于， 所述差分线对的预设对地阻抗具体为 50欧姆或者 67. 5欧姆。
9、根据权利要求 6所述的模拟线缆自串扰的装置， 其特征在于， 所述差分线对的预设隔离度的在 10分贝至 -60分贝的范围内。
10、根据权利要求 9所述的模拟线缆自串扰的装置，其特征在于， 所述差分线对的预设隔离度具体为 -40分贝。
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