CN111352884B - Large-scale switch matrix expansion method with consistent transmission path electrical length - Google Patents
Large-scale switch matrix expansion method with consistent transmission path electrical length Download PDFInfo
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- CN111352884B CN111352884B CN202010162368.3A CN202010162368A CN111352884B CN 111352884 B CN111352884 B CN 111352884B CN 202010162368 A CN202010162368 A CN 202010162368A CN 111352884 B CN111352884 B CN 111352884B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
Abstract
The invention discloses a method for expanding a large-scale switch matrix with consistent transmission path electrical length, which specifically comprises the following steps: step 1, inputting an expansion stage; step 2, inputting the signals input and output by the expansion stage in the step 1 into a switch matrix group; and 3, inputting the signals output by the switch matrix group in the step 2 into an output expansion stage. The invention avoids the problems of poor reliability, waste of expenses and inconvenient maintenance caused by the investment of a disposable large-scale switch matrix in the initial stage of station building.
Description
Technical Field
The invention belongs to the technical field of spacecraft measurement, control and application, and relates to a large-scale switch matrix expansion method with consistent transmission path electrical length.
Background
In recent years, with the increasing of the intensity of space launch activities in China, the number of measurement and control devices attached to the same ground station is increased, in order to increase the utilization rate of the devices, the measurement and control devices are not strictly fixed according to a set of customized devices, but front-end channel links of a plurality of sets of independent systems and terminal baseband devices are connected in a cross mode through a switch matrix, dynamic recombination of measurement and control resources in a measurement and control device cluster is achieved, the utilization rate of the devices is increased, and different measurement and control requirements are met. The large-scale switch matrix is the basis for realizing the dynamic recombination of resources.
For measurement, control and application of a spacecraft, ground station equipment is required to have stable uplink and downlink time delay, when parameters such as a distance value, a satellite-ground time difference, remote control command time delay and the like are calculated, the calibration is avoided or the calibration times of the equipment are reduced as far as possible, a switch matrix is used as an important ring for communicating a front-end channel link and terminal baseband equipment, and the electrical length of a transmission path from any input port to any output port is required to be consistent.
In view of the current state of the technology, there is no mature product in China for large-scale switch matrixes with a size of more than 64 × 64, and for the large-scale switch matrixes, the reliability, maintainability and expansibility cannot meet the requirement of quick response of ground measurement and control equipment.
In addition, with the development of science and technology, planning in the early stage of station building may be changed due to the development of technology, and there is a high risk of putting a large switch matrix once. Meanwhile, for the capacity expansion of the built station, when the original small-sized switch matrix cannot meet the capacity expansion requirement, if the large-sized switch matrix is adopted, the original small-sized switch matrix needs to be discarded, and the resource waste is caused.
Therefore, a large-scale switch matrix expansion method with good interchangeability, convenience for large-scale expansion and consistent transmission path electrical length needs to be researched.
Disclosure of Invention
The invention aims to provide a method for expanding a large switch matrix with consistent transmission path electrical length, which avoids the problems of poor reliability, waste of expenditure and inconvenient maintenance caused by the investment of a disposable large switch matrix at the initial stage of station building.
The invention adopts the technical scheme that the method for expanding the large-scale switch matrix with consistent transmission path electrical length specifically comprises the following steps:
and 3, inputting the signals output by the switch matrix group in the step 2 into an output expansion stage.
The present invention is also characterized in that,
in step 1, the input expansion stage comprises M1-minute i power division components.
The specific process of the step 1 is as follows: m paths of input signals pass through M1-branch i power division components to output M multiplied by i paths of signals, and each path of input signal is subjected to power division to output i paths of signals.
The switch matrix group in the step 2 comprises i groups of switch matrixes, and each group of switch matrix group comprises i N multiplied by N switch matrixes.
The specific process of the step 2 is as follows:
inputting the M multiplied by i paths of signals output by the input extension stage into a switch matrix group, correspondingly inputting the i paths of signals output by each 1-division i power division component into i groups of switch matrices, namely inputting the M paths of signals into each group of switch matrices, and outputting the M multiplied by i paths of signals after passing through the i groups of switch matrices.
The output expansion stage in step 3 comprises M i-to-1 switch modules.
And 3, inputting the M multiplied by i paths of signals output by the switch matrix group into an output expansion stage, correspondingly inputting the output signals of each group of switch matrix into M switch modules of i-to-1 selection, and outputting M paths of signals through selection of M-to-1 selection.
The method for expanding the large-scale switch matrix with the consistent transmission path electrical length has the advantages that the satellite ground station can be expanded into the large-scale switch matrix by adding the input expansion assembly, the small-scale switch matrix and the output expansion module through the original small-scale switch matrix in the station, the requirement of subsequent development can be met, and the risks of poor reliability, waste of expenditure, inconvenient maintenance and the like caused by the initial one-time investment of the large-scale switch matrix in the station construction are avoided.
Drawings
Fig. 1 is an expansion flow chart of a method for expanding a large-scale switch matrix with uniform transmission path electrical lengths according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a method for expanding a large-scale switch matrix with consistent transmission path electrical length, which is characterized in that in order to ensure that the transmission path electrical length from any input port to any output port of the expanded large-scale switch matrix is consistent, firstly, an expansion method is required to be designed to ensure that the transmission paths from any input port to any output port are consistent, secondly, an expansion module with uniform model specification and good interchangeability is selected to ensure that the transmission electrical length is the same from any input port to any output port as long as the transmission paths are the same.
If the mature small switch matrix is of size N × N, the switch matrix is developed to be a large switch matrix of size M × M, where M > N, M/N = i, and i is an integer no less than 2.
The expansion method adopted by the invention needs to add M1-minute i power division components, M1-from-i switch modules and i x i-1N x N small switch matrixes. The M1-divided-i power components form an input expansion stage, the newly added i x (i-1) small switch matrix and the original switch matrix form i x i switch matrices to form a switch matrix group, and the M i 1-selected switch modules form an output expansion stage. The input expansion stage, the medium and small size switch matrix group and the output expansion stage are connected in a three-stage expansion mode, so that the consistency of transmission paths from any input port to any output port is ensured. The schematic diagram of the implementation principle is shown in fig. 1, and the implementation principle is as follows:
inputting M paths of signals, flexibly switching and outputting the M paths of signals through three-stage extension connection, dividing the M paths of input signals into M multiplied by i paths of input signals through an input extension assembly, dividing each path of input signals into i paths of signals, respectively sending the i paths of signals to i switch matrix groups, flexibly switching the i switch matrix groups to output i paths of output signals, and selecting signals needing to be output through an i-to-1 output extension module.
The method specifically comprises the following steps:
in step 1, the input expansion stage comprises M1-minute i power division components.
The specific process of the step 1 is as follows: m paths of (In 1, in2 … … InN … … InM) input signals pass through M1-minute i power division assemblies, and output M × i paths of (In 1-1 … … In1-i, in2-1 … … In2-i, … …, inN-1 … … InN-i, … …, inM-1 … … InM-i) signals, and each path of input signals is power divided to output i paths of signals.
the switch matrix group in the step 2 comprises i groups of switch matrixes, and each group of switch matrix group comprises i N multiplied by N switch matrixes.
The specific process of the step 2 is as follows:
the M multiplied by i signals output by the input expansion stage are input into a switch matrix group, the i signals output by each 1-divided-i power division component are correspondingly input into i groups of switch matrixes, namely M signals are input into each group of switch matrixes, and M multiplied by i signals (Out 1-1, … …, out1-2, … …, out1-N, … …, out1-M, … M multiplied by i …, outi-1, … …, outi-2, … …, outi-N, … … and Outi-M) signals are output after the i groups of switch matrixes pass through the i groups of switch matrixes.
And 3, inputting the signals output by the switch matrix group in the step 2 into an output expansion stage.
The output expansion stage in step 3 comprises M1-out-of-i switch modules.
The specific process of the step 3 is to input and output M × i paths of signals output by the switch matrix group to the expansion stage, correspondingly input the output signals of each group of switch matrices to M i-to-1 switch modules, and output M paths of (Out 1, out2 … … OutN … … OutM) signals through selection of M-to-1.
The method for expanding the large-scale switch matrix with the consistent transmission path electrical length is characterized in that the transmission paths from any input port to any output port can be ensured to be the same, and in order to ensure that the transmission electrical lengths from any input port to any output port are the same, modules with uniform model specifications and good interchangeability are selected when an input expansion assembly, a switch matrix and an output expansion module are selected, so that the transmission paths are ensured to be the same and the transmission electrical lengths are the same.
The invention is suitable for the dynamic resource recombination of space ground measurement and control equipment and occasions needing to adopt large switch matrixes with consistent transmission path electrical lengths. The invention expands the small-sized switch matrix into the large-sized switch matrix by adding the input expansion assembly, the small-sized switch matrix and the output expansion module, and the expanded large-sized switch matrix has consistent transmission path electrical length, convenient maintenance and strong expansibility. By using the patent, the ground measurement and control equipment can expand the original small-sized switch matrix in the station into a large-sized switch matrix, thereby not only meeting the requirement of subsequent development, but also avoiding the risks of poor reliability, waste of expenses, inconvenient maintenance and the like caused by the investment of the primary large-sized switch matrix for building the station.
Claims (4)
1. A method for expanding a large-scale switch matrix with consistent transmission path electrical length is characterized in that: the method specifically comprises the following steps:
step 1, inputting an expansion stage;
the input expansion stage in the step 1 comprises M1-minute i power division components;
step 2, inputting the signals input and output by the expansion stage in the step 1 into a switch matrix group;
the switch matrix group in the step 2 comprises i groups of switch matrixes, and each group of switch matrix group comprises i N multiplied by N switch matrixes;
step 3, inputting the signals output by the switch matrix group in the step 2 into an output expansion stage;
the output expansion stage in the step 3 comprises M1-out-of-i switch modules.
2. The method of claim 1, wherein the large-scale switch matrix with uniform transmission path electrical length comprises: the specific process of the step 1 is as follows: m input signals pass through M1-branch i power division components to output M multiplied by i signals, and each input signal is divided to output i signals.
3. The method of claim 1, wherein the large-scale switch matrix with uniform transmission path electrical length comprises: the specific process of the step 2 comprises the following steps:
inputting the M multiplied by i paths of signals output by the input extension stage into a switch matrix group, correspondingly inputting the i paths of signals output by each 1-division i power division component into i groups of switch matrices, namely inputting the M paths of signals into each group of switch matrices, and outputting the M multiplied by i paths of signals after passing through the i groups of switch matrices.
4. The method of claim 1, wherein the large-scale switch matrix with uniform transmission path electrical length comprises: the specific process of the step 3 is to input and output M × i paths of signals output by the switch matrix groups to the extension stage, output signals of each group of switch matrices are correspondingly input to M i-to-1 switch modules, and M paths of signals are output through selection of M-to-1.
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| CN101277547A (en) * | 2008-03-18 | 2008-10-01 | 天津光电通信技术有限公司 | Large-scale strict non-blockage light-crossing connection matrix structure and control method thereof |
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| CN205246774U (en) * | 2015-12-08 | 2016-05-18 | 成都天大仪器设备有限公司 | Multiport extension testing arrangement |
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