CN102820964A - Method for aligning multichannel data based on system synchronizing and reference channel - Google Patents
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Abstract
The invention relates to the fields of optical fiber communication and digital communication. Particularly, the invention relates to a method for aligning multichannel data based on a system synchronizing and reference channel. The method for aligning the multichannel data based on the system synchronizing and reference channel comprises the following steps: the transmitted multichannel data are basically synchronized by arranging a ''system synchronization'' signal; then ''reference channel'' data are arranged additionally, so that a read control module for aligning channels is unrelated with the data of the working channel.
Description
Technical field
The present invention relates to fiber optic communication field and digital communicating field, refer more particularly to a kind of method of aliging with the multi-channel data of reference channel based on system synchronization.
Background technology
In phased array radar, the multi-channel A data owing to the difference of signal transmission path length, cause the difference of signal delay in transmission course, cause the problem that usually can run in the design process the multichannel data alignment.
The invention still further relates to and divide connection technology again: be merged into the single process of closing way word signal to two or more branch road digital signals by the time-division multiplex mode at the transmitting terminal of transmission line and be called digital multiplexing; Receiving terminal at transmission line is called digital demulplexing to the process that one road complex digital signal separates into two or more branch road digital signals, and digital demulplexing is the inverse process of digital demulplexing.Principle can be with reference to the chapter 8 of " Principles of Modern Communication " (list of references 1) in detail.
Chinese invention patent " alignment of a kind of multi-channel data go squint method and device " (application number is CN201110342980.X) discloses a kind of multichannel and has gone the technology that squints; Its concrete operations step: step 1. detect the tag block of each passage, begin the data of respective channel are write buffer memory successively from this tag block; Step 2. detect first tag block and pick up counting, if in the given time, the tag block that detects all passages all arrives, and then label alignment is effective; Step 3. under the effective situation of label alignment, begin sense data simultaneously from the original position of each passage buffer memory; Step 4. detect first tag block and pick up counting, if in the given time, the tag block that detects non-all passages all arrives, then label alignment failure, the buffer memory to each channel data empties operation then.
Also there is following deficiency in this patent: if one of them data channel is broken off; Then detect the tag block no show in the given time of this passage; Label alignment failure empties operation to the buffer memory of each channel data, therefore causes the data of other passage also can't align.Passage up to this disconnection connects the skew of going that could realize data again.
Summary of the invention
To disadvantages of background technology, the invention provides a kind of method of aliging with the multi-channel data of reference channel based on system synchronization, through setting up " system synchronization " signal, make the multi-channel data of transmission keep synchronous basically; Set up " reference channel " data, make the data independence of reading control module and service aisle of passage alignment thereafter.
Technical scheme of the present invention is: a kind of based on system synchronization and the method that the multi-channel data of reference channel aligns, comprise the steps:
Step 1, produce " system synchronization " signal at transmitting terminal;
Step 2, basis " system synchronization " are inserted synchronization frame in the N of transmitting terminal channel data;
Step 4 according to " system synchronization ", produces " reference channel " data at transmitting terminal, and carries out data with the N channel data and synthesize;
Step 5, receiving terminal to the transmission data separate synthetic;
Step 7, carry out alignment of data to separating synthetic data at receiving terminal.
Wherein N is more than or equal to 2.
Its beneficial effect is: any 1 data passages can not influence the alignment work of other channel data when breaking off, and the passage that breaks off can align with other channel data, and can not influence the transfer of data of other passage after connecting again automatically.
Aforesaid based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: " system synchronization " signal of said step 1 is produced by the SECO plate, and is distributed to N piece AD plate through the differential signal interface.Its beneficial effect is: guarantee that synchronous and " system synchronization " the SECO plate that N piece AD plate uses is consistent.
Aforesaid method of aliging with the multi-channel data of reference channel based on system synchronization; It is characterized in that: said step 2 is: the AD data are inserted frame synchronization, comprise following content: every AD buttress inserts synchronization frame according in the data of positive pulse position after the AD conversion of " system synchronization ".Its beneficial effect is: because the positive pulse duty ratio of " system synchronization " is very little, so the bandwidth that synchronization frame takies in serial data frame is also very little; Synchronization frame in the data guarantees the writing controller of back alignment of data step and effective work of deframer.
Aforesaid based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: it also comprises step 3, at transmitting terminal the channel data of the insertion synchronization frame in the step 2 is passed through Optical Fiber Transmission.Its beneficial effect is: adopt Optical Fiber Transmission lower than the cable transmission error rate.
Aforesaid based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: said step 4 comprises: at first produce " reference channel " data that have synchronization frame according to " system synchronization "; Secondly N channel data and 1 tunnel " reference channel " data are synthesized 1 circuit-switched data, and convert 1 road light signal to through electric light and give communication board.Its beneficial effect is: " reference channel " data guarantee effective work of Read Controller in the alignment of data step of back.
Aforesaid method of aliging with the multi-channel data of reference channel based on system synchronization; It is characterized in that: the said step four pests comprise: with N channel data and the synthetic M circuit-switched data of M road " reference channel " data; And convert M road light signal to through electric light and give communication board, wherein M is greater than 1.Its beneficial effect is: the N channel data can synthesize the signal transmission of M road, respectively comprises 1 tunnel " reference channel " data in the signal of M road.
Aforesaid method of aliging with the multi-channel data of reference channel based on system synchronization; It is characterized in that: said step 5 comprises: in communication board; M road light signal becomes the M road signal of telecommunication through opto-electronic conversion, then through separating synthetic recover N channel data and M road " reference channel " data.Its beneficial effect is: M road " reference channel " data guarantee effective work of main channel, back selector.
Aforesaid based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: it also comprises step 6, at receiving terminal the synthetic data of separating in the step 5 is carried out the main channel selection.Its beneficial effect is: to the system of M road " reference channel " data output is arranged in the step 5, can carry out the main channel and select, as long as there are " reference channel " data correct, just can select the main channel, increase the reliability of alignment of data.
Aforesaid method of aliging with the multi-channel data of reference channel based on system synchronization; It is characterized in that: said step 6 comprises: the synchronization frame of searching for M road " reference channel " at first respectively; Secondly with " reference channel " that search out synchronization frame earlier as the main channel, and the master clock that will align as the N channel data with the recovered clock of " reference channel " the corresponding deserializer that searches synchronization frame.Its beneficial effect is: in the recovered clock of M road, select 1 the tunnel as master clock, guarantee master clock and system clock homology.
Aforesaid based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: said step 7 comprises: at first search for the synchronization frame of N channel data, begin the data of respective channel are write buffer memory successively from this synchronization frame; Secondly main channel data is postponed a scheduled time, search synchronization frame the main channel data after postponing, the synchronization frame from this main channel begins to begin sense data from the original position of each passage buffer memory then.Its beneficial effect is: writing controller is only relevant with the data of N passage, and Read Controller is only relevant with main channel data.
Description of drawings
Fig. 1 is the hardware sketch map of transmitting terminal of the present invention;
Fig. 2 is the hardware sketch map of receiving terminal of the present invention;
Fig. 3 is a flow chart of the present invention;
Fig. 4 is a serial data frame assumption diagram behind the framing of the present invention;
Fig. 5 is " reference channel " data frame structure figure.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
Like Fig. 1 is the hardware sketch map of a kind of multi-channel data alignment transmitting terminal based on system synchronization and reference channel of the embodiment of the invention; Fig. 2 is the hardware sketch map of a kind of multi-channel data alignment receiving terminal based on system synchronization and reference channel of the embodiment of the invention.Below be the explanation of using hardware among Fig. 1,2:
The AD plate: accomplish AD conversion to the radar mean frequency data, and with data and " system synchronization " framing after the AD conversion.
Multiple connection plate: accomplish multiple connection, 8B10B coding, also string conversion and electric light conversion to the N channel data.
Because N is bigger; Serial data bandwidth after the data of N passage are encoded at multiple connection, 8B10B, also string is changed is bigger; Therefore the bandwidth capacity scope that has exceeded 1 electrical to optical converter converts 2 road light signals to through 2 electricals to optical converter: with the data multiplexing of 1 ~ X passage, 8B10B coding, and string conversion and electric light convert the 1 road light signal to; With the channel data multiple connection of (X+1) ~ N, 8B10B coding, and string conversion and electric light convert the 2 road light signal to.Wherein, X is more than or equal to 2.
SECO plate: produce " system synchronization " and " reference channel " data; Accomplish in the future that the 1 road light signal of runback fishplate bar reverts to 1 ~ X passage data, and 1 ~ X passage data and 1 tunnel " reference channel " data multiplexing that will recover, 8B10B coding, and string is changed and electric light is changed; In the future the 2 road light signal of runback fishplate bar reverts to (X+1) ~ N channel data, and (X+1) ~ N channel data and 1 tunnel " reference channel " data multiplexing that will recover, 8B10B coding, and string is changed and electric light is changed.
Communication board: will revert to 1 ~ X passage data, (X+1) ~ N channel data from the two ways of optical signals of SECO plate respectively, and this N channel data is alignd, separates frame, reverts to the data after original AD changes.
As shown in Figure 3, concrete may further comprise the steps with the method that the multi-channel data of reference channel aligns based on system synchronization:
1. produce " system synchronization " signal at transmitting terminal
In the SECO plate, synchronous generator produces one " system synchronization " by system clock: the positive pulse signal of 1 fixed cycle.And " system synchronization " signal is distributed to N piece AD plate through the differential signal interface.
Wherein, the cycle of " system synchronization " can be Millisecond or second level, and positive pulse width is delicate level.
Wherein, the differential signal interface can effectively suppress common mode disturbances, can be the RS422 interface, also can be the LVDS interface.
2. according to " system synchronization ", in the N of transmitting terminal channel data, insert synchronization frame
Insert synchronization frame in the data of positive pulse position after the AD conversion according to " system synchronization ".Comprise that synchronization frame inserts controller and framer:
Said synchronization frame inserts controller, is used for " system synchronization " converted to a synchronization frame;
Said framer is used for becoming serial data frame to send with the synchronization frame framing Frame.
The serial data frame that forms behind the framing all as " synchronization frame indication ", all is transmission channel data in the positive pulse position of " system synchronization " At All Other Times, and a serial data frame structure that forms behind the framing is as shown in Figure 4.
Because the positive pulse duty ratio of " system synchronization " is very little, the bandwidth that synchronization frame takies in serial data frame is also very little.
3. at transmitting terminal the channel data of the insertion synchronization frame in the step 2 is passed through Optical Fiber Transmission
In the multiple connection plate, multiplexer becomes 8 channel parallel datas with 1 ~ X passage data multiplexing; Serializer is encoded into 10 channel parallel datas to this 8 channel parallel data 8B10B, converts this 10 channel parallel data to serial data then; Electrical to optical converter sends to the SECO plate after converting this road serial data to the 1 road light signal.
In the multiple connection plate, multiplexer is multiplexed to 8 channel parallel datas with (X+1) ~ N channel data; Serializer is encoded into 10 channel parallel datas to this 8 channel parallel data 8B10B, converts this 10 channel parallel data to serial data then; Electrical to optical converter sends to the SECO plate after converting this road serial data to the 2 road light signal.
In the multiple connection plate, the work clock of multiplexer and the reference clock of serializer obtain by system clock branch/frequency multiplication.
In the SECO plate, optical-electrical converter the 1 road light signal of runback fishplate bar in the future converts serial electric signal to; Deserializer recovers clock from serial electric signal, convert serial signal to 10 road parallel signals, and 10 road parallel signal 8B10B are decoded into 8 road parallel signals; Coupler is connected into this 8 road parallel signal branch data of 1 ~ X passage.
In the SECO plate, optical-electrical converter the 2 road light signal of runback fishplate bar in the future converts serial electric signal to; Deserializer recovers clock from serial electric signal, convert serial signal to 10 road parallel signals, and 10 road parallel signal 8B10B are decoded into 8 road parallel signals; Coupler is connected into this 8 road parallel signal branch data of (X+1) ~ N passage.
In the SECO plate, the reference clock of deserializer obtains by system clock branch/frequency multiplication or is obtained by the crystal oscillator clock branch/frequency multiplication of SECO plate; The work clock of coupler is the recovered clock of serializer.
Wherein, there is commercial product in the present a plurality of producers of serializer and deserializer, just can realize the function of serializer and deserializer like the CYP15G0101DXB of CYPRESS company.Some FPGA has built-in Transceivers, can realize the function of serializer and deserializer, all has built-in Transceivers like arria GX, arria II GX, the Cyclone IV GX of ALTERA company.
4. according to " system synchronization ", produce " reference channel " data, and carry out data with the N channel data and synthesize at transmitting terminal
In the SECO plate, synchronous generator produces " reference channel " data that have synchronization frame according to " system synchronization "." reference channel " Frame all as " synchronization frame indication ", all is transmission filler codes in the positive pulse position of " system synchronization " At All Other Times, and " reference channel " data frame structure is as shown in Figure 5.
In the SECO plate, multiplexer becomes 8 channel parallel datas with 1 ~ X passage data and 1 tunnel " reference channel " data multiplexing; Serializer is encoded into 10 channel parallel datas to this 8 channel parallel data 8B10B, converts this 10 channel parallel data to serial data then; Electrical to optical converter sends to communication board through light mouth 1 after converting serial data to 1 road light signal.
In the SECO plate, multiplexer becomes 8 channel parallel datas with (X+1) ~ N channel data with 1 tunnel " reference channel " data multiplexing; Serializer is encoded into 10 channel parallel datas to this 8 channel parallel data 8B10B, converts this 10 channel parallel data to serial data then; Electrical to optical converter converts serial data in addition to and sends to communication board through light mouth 2 behind 1 road light signal.
In the SECO plate, the reference clock of the work clock of synchronous generator, the work clock of multiplexer and serializer obtains by system clock branch/frequency multiplication.
5. separate synthetic at receiving terminal to the data of transmission
In communication board, optical-electrical converter converts the light signal of light mouth 1 to serial electric signal; Deserializer recovers clock from serial electric signal, convert serial signal to 10 road parallel signals, and 10 road parallel signal 8B10B are decoded into 8 road parallel signals; Coupler is connected into this 8 road signal branch data and 1 tunnel " reference channel 1 " data of 1 ~ X passage.
In communication board, optical-electrical converter converts the light signal of light mouth 2 to serial electric signal; Deserializer recovers clock from serial electric signal, convert serial signal to 10 road parallel signals, and 10 road parallel signal 8B10B are decoded into 8 road parallel signals; Coupler is connected into this 8 road signal branch data and 1 tunnel " reference channel 2 " data of (X+1) ~ N passage.
In communication board, the reference clock of deserializer is obtained by the crystal oscillator clock branch/frequency multiplication of communication board; The work clock of coupler is the recovered clock of serializer.
6. at receiving terminal the synthetic data of separating in the step 5 are carried out the main channel selection
Search " reference channel 1 " data and " reference channel 2 " synchronization of data frame at first, secondly with " reference channel " that search out synchronization frame earlier as the main channel; And will with the recovered clock of " reference channel " the corresponding deserializer that searches synchronization frame as master clock.The work clock of the alignment of data module of back is obtained by master clock branch/frequency multiplication.
Comprise:
The synchronization frame search unit is used for search " reference channel " and reaches the synchronization of data frame.
Selected cell is used to select main channel and master clock.
7. carry out alignment of data at receiving terminal to separating synthetic data
At first search for the synchronization frame of each channel data, begin the data of respective channel are write buffer memory successively from this synchronization frame; Secondly main channel data is postponed a scheduled time, search synchronization frame the main channel data after postponing; Synchronization frame from this main channel begins to begin sense data from the original position of each passage buffer memory then; The data of at last each buffer memory being read separate frame, revert to the data after the original AD conversion.
Comprise:
Writing controller is used to search for the synchronization frame of each channel data, begins to control the buffer memory of each channel data according to the position of the synchronization frame that searches.
Buffer is used for the data of each passage of buffer memory respectively.
Delayer is used for main channel data is postponed a scheduled time.
Read Controller is used to search for the synchronization frame of main channel data, and control begins sense data simultaneously from the original position of each passage buffer memory simultaneously.
Deframer is used for finding according to the frame synchronization information that the serial data that is received contains the border of frame, is distributed to back level unit use to channel data frame that receives and synchronization frame then.
Wherein, writing controller comprises:
The synchronization frame search unit is used to search for each passage and reaches the synchronization of data frame;
Write and enable generation unit, be used to produce writing of buffer and enable.
Wherein, buffer can be realized from increasing RAM through FIFO or pointer.
Wherein, Read Controller comprises:
The synchronization frame search unit is used to search for the main channel and reaches the synchronization of data frame;
Read to enable generation unit, be used to produce buffer read enable.
Wherein, deframer comprises:
The synchronization frame search unit is used for searching for the synchronization of data frame that buffer is read;
Data are separated frame unit, are used for decomposition channels Frame and synchronization frame;
Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each module in the foregoing description can adopt the form of hardware to realize, also can adopt the form of functional module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Specialize, the input data of system's transmitting terminal not only can be the analog if signal of radar, also can be the interface signal of other types such as RS232 interface data, RS422 interface data, RS485 interface data, LVDS interface data.
" system synchronization " not only can be produced by the SECO plate, also can or be produced by the multiple connection plate by 1 road AD plate wherein.
Certainly; The present invention can also have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make corresponding change and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
List of references 1: publishing house of " Principles of Modern Communication "-Qinhua Univ., Beijing publishes in August, 1992 author: Cao Zhigang, Qian Yasheng book number ISBN 7-302-01002-1/TN.31.
Claims (10)
1. one kind based on system synchronization and the method that the multi-channel data of reference channel aligns, and comprises the steps:
Step 1, produce " system synchronization " signal at transmitting terminal;
Step 2, basis " system synchronization " are inserted synchronization frame in the N of transmitting terminal channel data;
Step 4 according to " system synchronization ", produces " reference channel " data at transmitting terminal, and carries out data with the N channel data and synthesize;
Step 5, receiving terminal to the transmission data separate synthetic;
Step 7, carry out alignment of data to separating synthetic data at receiving terminal,
Wherein N is more than or equal to 2.
2. as claimed in claim 1 based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: " system synchronization " signal of said step 1 is produced by the SECO plate, and is distributed to N piece AD plate through the differential signal interface.
3. method of aliging with the multi-channel data of reference channel as claimed in claim 2 based on system synchronization; It is characterized in that: said step 2 is: the AD data are inserted frame synchronization, comprise following content: every AD buttress inserts synchronization frame according in the data of positive pulse position after the AD conversion of " system synchronization ".
4. as claimed in claim 1 based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: it also comprises step 3, at transmitting terminal the channel data of the insertion synchronization frame in the step 2 is passed through Optical Fiber Transmission.
5. as claimed in claim 1 based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: said step 4 comprises: at first produce " reference channel " data that have synchronization frame according to " system synchronization "; Secondly N channel data and 1 tunnel " reference channel " data are synthesized 1 circuit-switched data, and convert 1 road light signal to through electric light and give communication board.
6. method of aliging with the multi-channel data of reference channel as claimed in claim 5 based on system synchronization; It is characterized in that: said step 4 also comprises: with N channel data and the synthetic M circuit-switched data of M road " reference channel " data; And convert M road light signal to through electric light and give communication board, wherein M is greater than 1.
7. method of aliging with the multi-channel data of reference channel as claimed in claim 1 based on system synchronization; It is characterized in that: said step 5 comprises: in communication board; M road light signal becomes the M road signal of telecommunication through opto-electronic conversion, then through separating synthetic recover N channel data and M road " reference channel " data.
8. like claim 1 or 7 described based on system synchronization and the method that the multi-channel data of reference channel aligns, it is characterized in that: it also comprises step 6, at receiving terminal the synthetic data of separating in the step 5 is carried out the main channel and selected.
9. method of aliging with the multi-channel data of reference channel as claimed in claim 8 based on system synchronization; It is characterized in that: said step 6 comprises: the synchronization frame of searching for M road " reference channel " at first respectively; Secondly with " reference channel " that search out synchronization frame earlier as the main channel, and the master clock that will align as the N channel data with the recovered clock of " reference channel " the corresponding deserializer that searches synchronization frame.
10. method of aliging with the multi-channel data of reference channel as claimed in claim 1 based on system synchronization; It is characterized in that: said step 7 comprises: at first search for the synchronization frame of N channel data, begin the data of respective channel are write buffer memory successively from this synchronization frame; Secondly main channel data is postponed a scheduled time, search synchronization frame the main channel data after postponing, the synchronization frame from this main channel begins to begin sense data from the original position of each passage buffer memory then.
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| CN108449088A (en) * | 2018-03-26 | 2018-08-24 | 北京润科通用技术有限公司 | Multi-channel high-speed sampling synchronization method and device |
| CN108449088B (en) * | 2018-03-26 | 2022-03-01 | 北京润科通用技术有限公司 | Multichannel high-speed sampling synchronization method and device |
| CN111081294A (en) * | 2019-12-25 | 2020-04-28 | 中国船舶重工集团公司七五0试验场 | Sound signal multi-channel synchronous acquisition and centralized storage system and method |
| WO2022095945A1 (en) * | 2020-11-06 | 2022-05-12 | 中兴通讯股份有限公司 | Communication chip and data processing method |
| WO2022126892A1 (en) * | 2020-12-17 | 2022-06-23 | 深圳市紫光同创电子有限公司 | Serdes interface circuit |
| CN112769536A (en) * | 2020-12-29 | 2021-05-07 | 苏州匾福光电科技有限责任公司 | Multichannel digital signal synchronization method and system based on bit error rate detection |
| CN112769536B (en) * | 2020-12-29 | 2022-06-03 | 苏州匾福光电科技有限责任公司 | Multichannel digital signal synchronization method and system based on bit error rate detection |
| CN118473628A (en) * | 2024-07-10 | 2024-08-09 | 此芯科技(无锡)有限公司 | Skew elimination method and system and electronic equipment |
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