CN116566572A - Multi-channel data transmission automatic synchronization method - Google Patents
Multi-channel data transmission automatic synchronization method Download PDFInfo
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- CN116566572A CN116566572A CN202310546598.3A CN202310546598A CN116566572A CN 116566572 A CN116566572 A CN 116566572A CN 202310546598 A CN202310546598 A CN 202310546598A CN 116566572 A CN116566572 A CN 116566572A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012549 training Methods 0.000 claims abstract description 28
- 230000002159 abnormal effect Effects 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 230000001360 synchronised effect Effects 0.000 abstract description 8
- 238000012545 processing Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000008713 feedback mechanism Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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- 230000005856 abnormality Effects 0.000 description 1
- 239000005441 aurora Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
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Abstract
The invention relates to an automatic synchronization method for multichannel data transmission, which comprises the following steps: s100, a plurality of data lines and a state detection line respectively transmit serial calibration training sequences from a transmitting end to a receiving end at the same time; s200, the receiving end restores the received calibration training sequence into parallel data and judges whether the received data are all calibration training data or not; s300, after a transmitting end detects a normal identifier of a calibration state, each data line transmits normal working data from the transmitting end to a receiving end, and the state detection line continuously transmits a calibration training sequence from the transmitting end to the receiving end and continuously detects the calibration state from the receiving end; s400, after the transmitting end detects the abnormal mark of the calibration state, all data lines of the transmitting end stop transmitting normal working data; s500, returning to the S100. The invention can ensure the synchronous performance of high-speed data transmission of the multipath signals under the changing external conditions, and also has the advantages of data transmission efficiency and timeliness, and the number of channels can be arbitrarily expanded, thereby being widely applicable.
Description
Technical Field
The invention relates to the technical field of digital processing, in particular to an automatic synchronization method for multichannel data transmission.
Background
With the rapid development of the aerospace industry in China, the requirements of satellite communication on the aspects of user capacity and use flexibility are continuously improved, and the advantages of rapidness and flexibility, precise control and strong anti-interference capability of the two beams are fully exerted by adopting a phased array antenna and a digital beam forming technology, so that the flexibility of a satellite communication system can be greatly improved, and the satellite communication system has become the development trend of satellite mobile communication at present. Therefore, in the subsequent stationary orbit mobile communication satellite system and the low orbit mobile communication satellite system in China, the synchronous transmission technology of the multi-channel data closely related to the phased array antenna and the digital beam forming system can be widely applied to the subsequent communication satellite digital load products.
The digital beam forming technology is a spatial filtering technology, and generally, in order to ensure the gain of multiple beams of the system, a scheme of hundreds of feeds is needed, so that the system comprises hundreds of channels, and the digital processing part provides extremely high requirements on the phase consistency of feed signals of all channels in order to ensure the beam gain performance of the digital beam forming system.
In the prior art of multi-channel data transmission, the problem of high-speed data transmission between FPGA boards based on an Aurora serial transmission protocol is analyzed, and the requirements of large capacity and high speed in the data transmission process can be realized, but the transmission requirement of multi-port synchronous transmission is not considered. In addition, the scheme provided by combining the specific application scenes of the inter-board transmission is also adopted to design each sub-module, but the related parallel transmission method and the serial interface design method of the inter-board high-speed data transmission have no universality. Meanwhile, a method for using frame synchronization as system synchronization is also proposed, wherein one frame of data must contain necessary control information except for effective data, at a signal transmitting end, the data is required to be correctly packaged and transmitted according to a defined frame format, at a receiving end, the system is required to correctly identify frame heads and correctly distinguish the control information and the effective data information, so that a signal processing system can correctly process the data further.
In summary, there is no multichannel data transmission technology in the prior art that can achieve efficiency, timeliness, and versatility.
Disclosure of Invention
In order to solve the problems, the invention provides an automatic synchronization method for multi-channel data transmission, which can ensure the synchronization performance of data in multi-channel data transmission and give consideration to the data transmission efficiency and reliability, and the number of channels and data parameters can be arbitrarily expanded or adjusted, so that the method has wide application range.
The embodiment of the invention provides an automatic synchronization method for multi-channel data transmission, which comprises the following steps:
s100, a plurality of data lines and a state detection line respectively transmit serial calibration training sequences from a transmitting end to a receiving end at the same time;
s200, the receiving end restores the received calibration training sequence into parallel data and judges whether the received data are all calibration training data or not; if yes, the receiving end feeds back a calibration state normal identifier to the transmitting end; if not, synchronizing the abnormal data through bit shift until all the received data are calibration training data, and feeding back a calibration state normal identifier to the transmitting end by the receiving end;
s300, after a transmitting end detects a normal identifier of a calibration state, each data line transmits normal working data from the transmitting end to a receiving end, and the state detection line continuously transmits a calibration training sequence from the transmitting end to the receiving end and continuously detects the calibration state from the receiving end; when the receiving end detects that the calibration training data of the state detection line is abnormal, real-time feedback of a calibration state abnormal identifier to the transmitting end is carried out;
s400, after the transmitting end detects the abnormal mark of the calibration state, all data lines of the transmitting end stop transmitting normal working data;
s500, returning to the S100.
Further, in S200, when the receiving end determines that the received calibration training data is abnormal, the data boundary of the serial transmission line is adjusted by controlling the bit shift, thereby completing byte synchronization and recording the control parameter of the bit shift.
Further, in S300, the receiving end of the state detection line converts the received serial data into parallel data according to the recorded control parameter of bit shift, and determines whether the data is in a normal or abnormal state.
Further, in S400, the receiving end of the state detection line determines that the calibration state identifier is abnormal or normal according to the determination result of the calibration state, and determines that the system is in the calibration mode or the working mode.
The multi-channel high-speed data transmission automatic synchronization method of the embodiment of the invention comprises the following steps:
(1) The multi-channel high-speed data synchronous transmission is realized by utilizing the universal resources, no additional control information or data information is added, the cost of data transmission is reduced, and the efficiency and timeliness of the data transmission can be ensured;
(2) The synchronous performance of high-speed data transmission of the multipath signals under the changing external conditions is ensured by a training sequence data checking mode and a state real-time monitoring feedback mechanism, and the reliability of the multipath signal data transmission is improved; varying external conditions include dyssynchrony between multiple signals due to product temperature, supply fluctuations, clock phase burst jitter, external disturbances, etc.
(3) The number of channels is not limited, the number of channels can be expanded according to the use requirement, the data transmission rate can be improved according to the requirement of the baseband transmission rate, and the application is flexible.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a multi-channel high-speed data transmission automatic synchronization method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of the overall architecture of an automatic synchronization method for multi-channel high-speed data transmission according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the working mode of the embodiment of the present invention;
FIG. 4 is a schematic diagram of a calibration mode according to an embodiment of the present invention;
fig. 5 is a timing diagram of a shift process according to an embodiment of the invention.
Detailed Description
The description of the embodiments of this specification should be taken in conjunction with the accompanying drawings, which are a complete description of the embodiments. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated simply or conveniently. Furthermore, portions of the structures in the drawings will be described in terms of separate descriptions, and it should be noted that elements not shown or described in the drawings are in a form known to those of ordinary skill in the art.
Any references to directions and orientations in the description of the embodiments herein are for convenience only and should not be construed as limiting the scope of the invention in any way. The following description of the preferred embodiments will refer to combinations of features, which may be present alone or in combination, and the invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims.
As shown in fig. 1, 3 and 4, a multi-channel data transmission automatic synchronization method according to an embodiment of the present invention includes:
s100, a plurality of data lines and a state detection line respectively transmit serial calibration training sequences from a transmitting end to a receiving end at the same time.
As shown in fig. 2, according to one data transmission system that can be used to implement the method of the present invention, the system mainly includes a data processing unit, a parallel data processing module, and a serial data transmitting module that are disposed on a transmitting-side FPGA, and a data processing unit, a parallel data processing module, and a serial data receiving module that are disposed on a receiving-side FPGA. On a sending end FPGA, a data processing unit sends multiple paths of parallel data to a parallel data processing module, and in a calibration mode and a working mode, a serial data sending module respectively sends a calibration training sequence and a working data sequence to a serial data sending module of a receiving end FPGA, and the parallel data processing module and the data processing unit on the receiving end FPGA are respectively used for subsequent corresponding processing of received data. Meanwhile, the sending end FPGA and the receiving end FPGA are connected through a state detection line to form a state detection and calibration state identification for data sending.
S200, the receiving end restores the received calibration training sequence into parallel data and judges whether the received data are all calibration training data. If yes, the receiving end feeds back the calibration state normal identification to the transmitting end. If not, the abnormal data are synchronized through bit shift until all the received data are calibration training data, and the receiving end feeds back a calibration state normal identifier to the transmitting end. The bit shifting method is shown in fig. 5, taking the rising edge of the bittlip signal as a reference, converting the data under the drive of double-edge sampling of the clk clock, and shifting the bittlip by half a clock period when the data is not the calibration sequence until the calibration sequence is detected.
When the receiving end judges that the received calibration training data is abnormal, the data boundary of the serial transmission line is adjusted by controlling bit shift, thereby completing byte synchronization, and recording control parameters of bit shift, wherein the parameters of bit shift are used for real-time calibration of the state detection line in a working mode.
S300, after a transmitting end detects a normal identifier of a calibration state, each data line transmits normal working data from the transmitting end to a receiving end, a state detection line continuously transmits a calibration training sequence from the transmitting end to the receiving end and the receiving end continuously detects the calibration state; when the receiving end detects that the calibration training data of the state detection line is abnormal, the calibration state abnormal identification is fed back to the transmitting end in real time.
The receiving end of the state detection line converts the received serial data into parallel data according to the recorded bit shift control parameters and judges whether the data is in a normal or abnormal state.
S400, after the transmitting end detects the abnormal mark of the calibration state, all data lines of the transmitting end stop transmitting normal working data.
The receiving end of the state detection line determines that the calibration state mark is abnormal or normal according to the judgment result of the calibration state, and determines that the system is in a calibration mode (including S100-S200) or a working mode (including S300-S400).
S500, returning to the S100.
When no abnormality is detected, S400 is continuously performed, and normal operation data is continuously transmitted, i.e., in an operation mode.
Recalibration is performed when an anomaly is detected and S100-S400 are continued after calibration is completed.
The multichannel high-speed data transmission automatic synchronization method provided by the embodiment of the invention has the following advantages:
(1) The multi-channel high-speed data synchronous transmission is realized by utilizing the universal resource, no additional control information or data information is needed, the cost of data transmission is reduced, and the efficiency and timeliness of the data transmission can be ensured.
(2) The synchronous performance of high-speed data transmission of the multipath signals under the changing external conditions is ensured by a training sequence data checking mode and a state real-time monitoring feedback mechanism, and the reliability of the multipath signal data transmission is improved; varying external conditions include dyssynchrony between multiple signals due to product temperature, supply fluctuations, clock phase burst jitter, external disturbances, etc.
(3) The number of channels is not limited, the number of channels can be expanded according to the use requirement, the data transmission rate can be improved according to the requirement of the baseband transmission rate, and the application is flexible.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. An automatic synchronization method for multi-channel data transmission, characterized in that the automatic synchronization method for multi-channel data transmission comprises the following steps:
s100, a plurality of data lines and a state detection line respectively transmit serial calibration training sequences from a transmitting end to a receiving end at the same time;
s200, the receiving end restores the received calibration training sequence into parallel data and judges whether the received data are all calibration training data or not;
if yes, the receiving end feeds back a calibration state normal identifier to the transmitting end;
if not, synchronizing the abnormal data through bit shift until all the received data are calibration training data, and feeding back a calibration state normal identifier to the transmitting end by the receiving end;
s300, after a transmitting end detects a normal identifier of a calibration state, each data line transmits normal working data from the transmitting end to a receiving end, and the state detection line continuously transmits a calibration training sequence from the transmitting end to the receiving end and continuously detects the calibration state from the receiving end;
when the receiving end detects that the calibration training data of the state detection line is abnormal, real-time feedback of a calibration state abnormal identifier to the transmitting end is carried out;
s400, after the transmitting end detects the abnormal mark of the calibration state, all data lines of the transmitting end stop transmitting normal working data;
s500, returning to the S100.
2. The automatic synchronization method of multi-channel data transmission according to claim 1, wherein in S200, when the receiving end determines that the received calibration training data is abnormal, the data boundary of the serial transmission line is adjusted by controlling the bit shift, thereby completing the byte synchronization, and recording the control parameter of the bit shift.
3. The automatic synchronization method for multi-channel data transmission according to claim 2, wherein in S300, the receiving end of the status detection line converts the received serial data into parallel data according to the recorded control parameter of bit shift and judges whether the data is in a normal or abnormal status.
4. The method according to claim 2, wherein in S400, the receiving end of the state detection line determines that the calibration state is marked as abnormal or normal according to the determination result of the calibration state, and determines that the system is in the calibration mode or the operation mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310546598.3A CN116566572A (en) | 2023-05-15 | 2023-05-15 | Multi-channel data transmission automatic synchronization method |
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| CN202310546598.3A CN116566572A (en) | 2023-05-15 | 2023-05-15 | Multi-channel data transmission automatic synchronization method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117714022A (en) * | 2024-02-05 | 2024-03-15 | 苏州联讯仪器股份有限公司 | Multichannel bit offset calculation method, device, equipment and medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117714022A (en) * | 2024-02-05 | 2024-03-15 | 苏州联讯仪器股份有限公司 | Multichannel bit offset calculation method, device, equipment and medium |
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