CN106953712A - Data signal receive-transmit system and receiving/transmission method - Google Patents
Data signal receive-transmit system and receiving/transmission method Download PDFInfo
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Abstract
Present invention is disclosed a kind of data signal receiving/transmission method, including, when launching the data signal, the data flow that many level symbols are constituted is divided into continuous data frame and is transmitted；Preset information is added in each data frame, for system synchronization, clock recovery, channel estimation and equalizer training；The add-on system information in each data frame, for characterizing this frame of data information modulating mode, intertexture pattern and LDPC encoder bit rates；Interpolation data information in each data frame；Wherein preset information, system information and data message form simple single order circulation；When receiving data signal, detection determines the position of preset information, with first symbol clock position after the preset information, is used as the beginning of system information；Detection determines the position of system information, with first symbol clock position after the system information, is used as the beginning of data message；Signal transacting is carried out to data message.Present invention further teaches a kind of data signal receive-transmit system.
Description
It is on July 17th, 2006, Application No. 200610028998.1, entitled " data signal the applying date that the application, which is,
The divisional application of the patent application of receive-transmit system and receiving/transmission method ".
Technical field
The present invention relates to digital signal transmission technique field, DTB Digital Terrestrial Broadcasting is applied to more specifically to one kind
The data signal receive-transmit system and receiving/transmission method of the system synchronization of transmission.
Background technology
Wireless transmitting system includes transmitter and receiver.Fig. 1 is the frame of typical digital radio Transmission system 100
Figure, transmitting procedure includes：In transmitting terminal 102, first to being encoded from the data signal of signal source 104, add necessary
Auxiliary information, such as synchronizing signal, pilot signal；Data signal after coding forms baseband signal after channel filtering；Should
Baseband signal is sent after up converter is modulated onto corresponding frequency band.In receiving terminal 106, if tuner, then need not
There is a down coversion, high-frequency signal is transformed to after base band and obtain data signal through analog-digital converter by tuner；The data signal is passed through
The information consistent with transmitting terminal is restored to after the processing of the signal processing terminal 108.
In digital television ground broadcast transmission system, the data frame of transmission different business can select to use different biographies
Defeated pattern.Channel coding scheme corresponding to the terrestrial transmission pattern of four kinds of code checks is as shown in Figure 2.
The transmission method of signal is such in digital tv ground broadcasting：Transmitted in digital transmission system by
The data flow of many level symbol compositions is divided into continuous data frame one by one and is transmitted；Each data frame packet is containing 3 portions
Point, it is preset information, system information and data message respectively, and simple single order is formed with this to circulate.Fig. 3 shows digital electricity
High code check 32-QAM, the 16-QAM used depending on ground broadcast transfer system, middle code check 4-QAM and low bit- rate 4-QAM- NR frame
The specific example of structure, wherein preset information are realized by the PN sequences of 595；System information knows letter by two level of 4
Included in an expression behind number in the system information vector of two level symbol sequences of addition 64 32, each data frame
The data message of 3744 symbols.
When system transmits signal under above-mentioned tetra- kinds of modulating modes of 32-QAM, 16-QAM, 4-QAM and 4-QAM-NR, connecing
Receiving end is to that will carry out data scrambling code decoding in the processing procedure of signal, this relates to how to determine to carry out at descrambling code data
The original position of reason, that is, how to realize the stationary problem of data scrambling code decoding.When system transmits signal under each modulating mode,
Symbol deinterleaving will be carried out in processing procedure of the receiving terminal to signal；Thus involve how to determine to solve data
The original position of interleaving treatment, that is, how to realize the stationary problem that symbol is deinterleaved.System is transmitted under each modulating mode
During signal, channel LDPC decodings will be carried out in processing procedure of the receiving terminal to signal；Low bit- rate modulating mode, in receiving terminal
To carry out channel NR decodings in the processing procedure of signal；How to determine to carry out channel LDPC to data similarly, also relating to
Decoding, the original position of NR decoding process, that is, how to realize the stationary problem of channel LDPC decodings, and channel NR solutions
The stationary problem of code.
The content of the invention
The purpose of the present invention be in view of the shortcomings of the prior art there is provided one kind can be used for channel decoding, symbol deinterleave and
The synchronous data signal receiving/transmission method and receive-transmit system of data scrambling code decoding.The present invention can realize channel LDPC decodings respectively
The synchronous, synchronization of channel NR decodings and the synchronization of data scrambling code decoding.It is wide that the method for the present invention goes for digital TV ground
In broadcast system.
According to the first aspect of the invention there is provided a kind of digital signal transmission method for being used to realize system synchronization, including：
The data flow that many level symbols are constituted is divided into continuous data frame and is transmitted；
Preset information is added in each data frame, for system synchronization, clock recovery, channel estimation and balanced device
Training；
The add-on system information in each data frame, for characterizing this frame of data information modulating mode, intertexture pattern
With LDPC encoder bit rates；
Interpolation data information in each data frame；Wherein described preset information, system information and data message are formed
Simple single order circulation.
According to the second aspect of the invention there is provided a kind of digital signal reception method for being used to realize system synchronization, it is special
Levy and be, received digital signal at least includes preset information, system information and data message, the method for reseptance includes：
Detection determines the position of preset information, with first symbol clock position after the preset information, believes as system
The beginning of breath；
Detection determines the position of system information, with first symbol clock position after the system information, believes as data
The beginning of breath；
Signal transacting is carried out to data message.
Preferably, the position of described preset information is determined using asynchronous correlator, including：
By the asynchronous correlator of data flow serial input received；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are being spaced k timeticks
When asynchronous correlator output value all be autocorrelation value when, determine the position be the frame in preset information transmit end position, institute
It is system information in Transmission system data frame and data message symbolic number sum to state k.
According to the third aspect of the invention we there is provided a kind of data signal receiving/transmission method for being used to realize system synchronization, including：
When launching the data signal, the data flow that many level symbols are constituted is divided into continuous data frame and passed
It is defeated；
Preset information is added in each data frame, for system synchronization, clock recovery, channel estimation and balanced device
Training；
The add-on system information in each data frame, for characterizing this frame of data information modulating mode, intertexture pattern
With LDPC encoder bit rates；
Interpolation data information in each data frame；Wherein described preset information, system information and data message are formed
Simple single order circulation；
When receiving the data signal, detection determines the position of preset information, with first symbol after the preset information
Clock position, is used as the beginning of system information；
Detection determines the position of system information, with first symbol clock position after the system information, believes as data
The beginning of breath；
Signal transacting is carried out to data message.
Wherein, the preset information is by the PN Sequence compositions of m.The system information is by the two level deterministic signals of n
The walsh Sequence compositions of j are added below；And described n+j system information is added after the preset information of m.
Preferably, the m is that 4, j is 32 for 595, n.
Embodiments in accordance with the present invention, the data signal receiving/transmission method be used for realize symbol deinterleave, channel decoding and
The synchronization of data scrambling code decoding.The synchronization that the data signal receiving/transmission method is used for channel decoding may include digital TV ground transmission
Channel LDPC decodings, the synchronization of channel NR decodings.
Embodiments in accordance with the present invention, the position of described preset information determined using asynchronous correlator, including：
By the asynchronous correlator of data flow serial input received；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are being spaced k timeticks
When asynchronous correlator output value all be autocorrelation value when, determine the position be the frame in preset information transmit end position, institute
It is system information in Transmission system data frame and data message symbolic number sum to state k.
Preferably, the k is 3 for 3780, N.
According to the fourth aspect of the invention, a kind of digital signal transmitters for being used to realize system synchronization, including：
Data frame segmenting device, the data flow that many level symbols are constituted is divided into continuous data frame；
Data transmission device, the data frame is transmitted；
Preset information adding set, preset information is added in each data frame, extensive for system synchronization, clock
Multiple, channel estimation and equalizer training；
System information adding set, the add-on system information in each data frame, for characterizing this frame of data information
Modulating mode, intertexture pattern and LDPC encoder bit rates；
Interpolation data information in data message adding set, each data frame；Wherein described preset information, system letter
Breath and data message form simple single order circulation.
According to the fifth aspect of the invention, received digital signal at least includes preset information, system information and data
Information, the receiver includes：
Preset information position determining means, detection determines the position of preset information, with first symbol after the preset information
Number clock position, is used as the beginning of system information；
System information position determining means, detection determines the position of system information, with first symbol after the system information
Number clock position, is used as the beginning of data message；
Processing data information device, signal transacting is carried out to data message.
Preferably, the preset information position determining means are asynchronous correlators, wherein,
The asynchronous correlator receives the data flow with serial input mode；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are being spaced k timeticks
When asynchronous correlator output value all be autocorrelation value when, determine the position be the frame in preset information transmit end position, institute
It is system information in Transmission system data frame and data message symbolic number sum to state k.
According to the sixth aspect of the invention there is provided a kind of data signal receive-transmit system for being used to realize system synchronization, it is special
Levy and be, including：
Digital signal transmitters, including,
Data frame segmenting device, the data flow that many level symbols are constituted is divided into continuous data frame；
Data transmission device, the data frame is transmitted；
Preset information adding set, preset information is added in each data frame, extensive for system synchronization, clock
Multiple, channel estimation and equalizer training；
System information adding set, the add-on system information in each data frame, for characterizing this frame of data information
Modulating mode, intertexture pattern and LDPC encoder bit rates；
Interpolation data information in data message adding set, each data frame；Wherein described preset information, system letter
Breath and data message form simple single order circulation；
Digital signal receiver, including,
Preset information position determining means, detection determines the position of preset information, with first symbol after the preset information
Number clock position, is used as the beginning of system information；
System information position determining means, detection determines the position of system information, with first symbol after the system information
Number clock position, is used as the beginning of data message；
Processing data information device, signal transacting is carried out to data message.
Wherein, the preset information of preset information adding set addition is by the PN Sequence compositions of m.The system information
The system information of adding set addition is by the addition walsh Sequence compositions of j behind the two level deterministic signals of n；And it is described
The system information of n+j is added after the preset information of m.
Preferably, the m is that 4, j is 32 for 595, n.
Embodiments in accordance with the present invention, the data signal receive-transmit system can be used for realize symbol deinterleave, channel decoding and
The synchronization of data scrambling code decoding.The synchronization that the data signal receive-transmit system is used for channel decoding may include digital TV ground transmission
Channel LDPC decodings, the synchronization of channel NR decodings.
Embodiments in accordance with the present invention, described preset information position determining means are asynchronous correlators, wherein
The asynchronous correlator receives the data flow with serial input mode；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are being spaced k timeticks
When asynchronous correlator output value all be autocorrelation value when, determine the position be the frame in preset information transmit end position, institute
It is system information in Transmission system data frame and data message symbolic number sum to state k.
Preferably, the k is 3 for 3780, N.
The inventive method and system determine that symbol is deinterleaved, channel LDPC is decoded, channel according to the position of preset information
NR decodings or the original position of data scrambling code decoding, system can realize synchronous, the letter that symbol is deinterleaved according to the original position
Synchronization, the synchronization of channel NR decodings and the synchronization of data scrambling code decoding of road LDPC decodings, are respectively completed solution symbol interleaving, channel
LDPC decodings, channel NR decodings or data scrambling code decoding.The present invention comes relative to the catching method of 4 level segment syncs in ATSC
Say, the method for this PN related synchronizations has faster acquisition speed, simultaneously as gain related PN is very big, anti-interference energy
Power is stronger.
Brief description of the drawings
The above and other features of the present invention, property and advantage to embodiment by by retouching below in conjunction with the accompanying drawings
State and become readily apparent from, in the accompanying drawings, identical reference represents identical feature all the time, wherein：
Fig. 1 is the block diagram of digital transmission system of the prior art；
Fig. 2 is digital television ground broadcast transmission system channel coding scheme block diagram；
Fig. 3 is high code check 32-QAM, 16-QAM, middle code check 4-QAM and low bit- rate 4-QAM-NR frame structure；
Fig. 4 is the block diagram of the emitter according to embodiments of the invention；
Fig. 5 is the block diagram of the receiver according to embodiments of the invention；
Fig. 6 is the block diagram of the receive-transmit system according to embodiments of the invention；
Fig. 7 is the asynchronous correlator configuration figure according to embodiments of the invention；
Fig. 8 synchronizes symbol deinterleaving, channel decoding sum to be closed according to embodiments of the invention using asynchronous phase
According to the workflow of descrambling code；
Fig. 9 is the flow chart of the launching technique according to embodiments of the invention；
Figure 10 is the flow chart of the method for reseptance according to embodiments of the invention；
Figure 11 is the flow chart of the receiving/transmission method according to embodiments of the invention.
Embodiment
Technical scheme is further illustrated below in conjunction with the accompanying drawings.
It is an object of the invention to provide a kind of synchronous number available for channel decoding, symbol deinterleaving and data scrambling code decoding
Word signal transmit-receive method and receive-transmit system.It is same that the present invention can realize that the synchronization of channel LDPC decodings, channel NR are decoded respectively
The synchronization of step and data scrambling code decoding.The method of the present invention goes in digital tv ground broadcasting.
Digital signal transmitters
First, there is provided a kind of digital signal transmitters for being used to realize system synchronization, reference according to an aspect of the present invention
The emitter 400 according to one embodiment of the invention shown in Fig. 4, the emitter 400 includes：
Data frame segmenting device 402, the data flow that many level symbols are constituted is divided into continuous data frame.
Data transmission device 404, data frame is transmitted.
Preset information adding set 406, preset information is added in each data frame, for system synchronization, clock recovery,
Channel estimation and equalizer training, wherein, the preset information is by the PN Sequence compositions of m.
System information adding set 408, the add-on system information in each data frame is adjusted for characterizing this frame of data information
Molding formula, intertexture pattern and LDPC encoder bit rates；Wherein, the system information adding set addition system information by n two
The walsh Sequence compositions of addition j behind level deterministic signal；And the system information addition of n+j is in the preset information of m
Afterwards.
Interpolation data information in data message adding set 410, each data frame；Wherein preset information, system information and
Data message forms simple single order circulation.
According to one embodiment of the invention, the value of parameter m, n, j in all parts of the emitter are as follows：M is
595, n be that 4, j is 32.
Digital signal receiver
There is provided a kind of digital signal receiver for being used to realize system synchronization, the receiver according to an aspect of the present invention
Received digital signal at least include preset information, system information and data message, with reference to shown in Fig. 5 according to the present invention
The receiver 500 of one embodiment, the receiver 500 includes：
Preset information position determining means 502, detection determines the position of preset information, with first after the preset information
Symbol clock position, is used as the beginning of system information；
System information position determining means 504, detection determines the position of system information, with first after the system information
Symbol clock position, is used as the beginning of data message；
Processing data information device 506, signal transacting is carried out to data message.Carrying out signal transacting to data message includes
Synchronizing symbol is deinterleaved, channel is decoded and data scrambling code decoding.
According to one embodiment of the invention, preset information position determining means 502 therein can be realized by asynchronous correlator,
Wherein,
The asynchronous correlator receives data flow with serial input mode；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are being spaced k timeticks
When asynchronous correlator output value when being all autocorrelation value, it is the end position that preset information is transmitted in the frame to determine the position, and k is
System information and data message symbolic number sum in Transmission system data frame.
According to one embodiment of the invention, the parameter in all parts of the receiver is as follows：K is that 3780, N is 3.
Further, according to one embodiment of the invention, described asynchronous correlator can use structure 700 as shown in Figure 7,
It includes several d type flip flop 702a-n being sequentially connected, and the output of each d type flip flop 702 is connected to next d type flip flop
Input, while being also connected to a corresponding multiplier 704a-n, the output of all multipliers 704 is connected to adder 706, addition
The output I of device 706 as asynchronous correlator 700 output.
Detect the process for the position for determining preset information as shown in figure 8, Fig. 8 method using the asynchronous correlator 700
For the work for synchronizing symbol deinterleaving, channel decoding and data scrambling code decoding is closed using asynchronous phase according to embodiments of the invention
Make flow 800.
By the flows of data signals received, the flows of data signals can be that the flows of data signals of non-demapping (is used for symbol
The synchronizing process of deinterleaving), without the LDPC flows of data signals (be used for channel LDPC decode synchronizing process) decoded or not
The data message stream (being used for the synchronizing process that channel NR is decoded) decoded through NR, the asynchronous correlation of data flow serial input first
Device (step 802), asynchronous correlator is in running order all the time, when asynchronous correlator output value is autocorrelation value (i.e. maximum)
When start counting up (step 804)；If continuous 3 times when being spaced 3780 timeticks asynchronous correlator output value be all from phase
Pass is worth, and it is the end position (step 806) that preset information is transmitted to determine the position.With first symbol clock position behind the position
Starting point is set to, the data message to after makees symbol deinterleaving, channel LDPC decodings or channel NR decodings (step 808).
It should be noted that N can k value can take other values according to different applications, the present invention does not limit N and k
Specific value.
Data signal receive-transmit system
According to an aspect of the present invention, a kind of data signal receive-transmit system for being used to realize system synchronization, reference are also provided
The receive-transmit system 600 according to one embodiment of the invention shown in Fig. 6, the receive-transmit system 600 includes：
Emitter 602 includes：
Data frame segmenting device 622, the data flow that many level symbols are constituted is divided into continuous data frame.
Data transmission device 624, data frame is transmitted.
Preset information adding set 626, preset information is added in each data frame, for system synchronization, clock recovery,
Channel estimation and equalizer training, wherein, the preset information is by the PN Sequence compositions of m.
System information adding set 628, the add-on system information in each data frame is adjusted for characterizing this frame of data information
Molding formula, intertexture pattern and LDPC encoder bit rates；Wherein, the system information adding set addition system information by n two
The walsh Sequence compositions of addition j behind level deterministic signal；And the system information addition of n+j is in the preset information of m
Afterwards.
Interpolation data information in data message adding set 630, each data frame；Wherein preset information, system information and
Data message forms simple single order circulation.
According to one embodiment of the invention, the value of parameter m, n, j in all parts of the emitter are as follows：M is
595, n be that 4, j is 32.
Receiver 604 includes：
Preset information position determining means 642, detection determines the position of preset information, with first after the preset information
Symbol clock position, is used as the beginning of system information；
System information position determining means 644, detection determines the position of system information, with first after the system information
Symbol clock position, is used as the beginning of data message；
Processing data information device 646, signal transacting is carried out to data message.
According to one embodiment of the invention, preset information position determining means 642 therein can be realized by asynchronous correlator,
Wherein,
The asynchronous correlator receives data flow with serial input mode；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are being spaced k timeticks
When asynchronous correlator output value when being all autocorrelation value, it is the end position that preset information is transmitted in the frame to determine the position, and k is
System information and data message symbolic number sum in Transmission system data frame.
According to one embodiment of the invention, the parameter in all parts of the receiver is as follows：K is that 3780, N is 3.
The data signal receive-transmit system 600 can be used for realizing symbol deinterleaving, channel decoding and the synchronization of data scrambling code decoding.
Wherein, data signal receive-transmit system is used for channel LDPC decoding of the synchronization including digital TV ground transmission, the letter that channel is decoded
The synchronization of road NR decodings.
Further, according to one embodiment of the invention, the asynchronous phase that the receiver 604 in the receive-transmit system 600 is used
Structure 700 as shown in Figure 7 can also be used by closing device, and it includes several d type flip flop 702a-n being sequentially connected, each D triggerings
The output of device 702 is connected to the input of next d type flip flop, while being also connected to corresponding a multiplier 704a-n, Suo Youcheng
The output of musical instruments used in a Buddhist or Taoist mass 704 is connected to adder 706, the output I of adder 706 as asynchronous correlator 700 output.
Detect that the process for the position for determining preset information is same as shown in Fig. 8 using the asynchronous correlator 700, Fig. 8's
Method synchronizes symbol deinterleaving, channel decoding and data scrambling code decoding to be closed according to embodiments of the invention using asynchronous phase
Workflow 800.
By the flows of data signals received, the flows of data signals can be that the flows of data signals of non-demapping (is used for symbol
The synchronizing process of deinterleaving), without the LDPC flows of data signals (be used for channel LDPC decode synchronizing process) decoded or not
The data message stream (being used for the synchronizing process that channel NR is decoded) decoded through NR, the asynchronous correlation of data flow serial input first
Device (step 802), asynchronous correlator is in running order all the time, when asynchronous correlator output value is autocorrelation value (i.e. maximum)
When start counting up (step 804)；If continuous 3 times when being spaced 3780 timeticks asynchronous correlator output value be all from phase
Pass is worth, and it is the end position (step 806) that preset information is transmitted to determine the position.With first symbol clock position behind the position
Starting point is set to, the data message to after makees symbol deinterleaving, channel LDPC decodings or channel NR decodings (step 808).
It should be noted that N can k value can take other values according to different applications, the present invention does not limit N and k
Specific value.
Digital signal transmission method
According to the present invention, a kind of digital signal transmission method for being used to realize system synchronization is also provided, with reference to shown in Fig. 9,
Fig. 9 is the flow chart of the launching technique according to embodiments of the invention, and the launching technique 900 includes：
902. data flows for constituting many level symbols are divided into continuous data frame and are transmitted.
904. add preset information in each data frame, for system synchronization, clock recovery, channel estimation and balanced device
Training；Wherein preset information is by the PN Sequence compositions of m.
906. in each data frame add-on system information, for characterizing this frame of data information modulating mode, intertexture pattern
With LDPC encoder bit rates；Wherein system information is by adding the walsh Sequence compositions of j behind the two level deterministic signals of n；And
The system information of n+j is added after the preset information of m.
Interpolation data information in 908. each data frames；Wherein preset information, system information and data message are formed merely
Single order circulation.
According to one embodiment of the invention, the value of each parameter is as follows in digital signal transmission method 900 of the invention：m
It is that 4, j is 32 for 595, n.
Digital signal reception method
According to the present invention, a kind of digital signal reception method for being used to realize system synchronization, the numeral received are also provided
Signal at least includes preset information, system information and data message, with reference to shown in Figure 10, and Figure 10 is according to embodiments of the invention
Method of reseptance flow chart, the method for reseptance 1000 includes：
1002. detections determine the position of preset informations, with first symbol clock position after the preset information, as being
The beginning for information of uniting；
1004. detections determine the position of system information, with first symbol clock position after the system information, are used as number
It is believed that the beginning of breath；
1006. pairs of data messages carry out signal transacting.
According to one embodiment of the invention, the position of preset information is determined using asynchronous correlator, including：
By the asynchronous correlator of data flow serial input received；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are being spaced k timeticks
When asynchronous correlator output value all be autocorrelation value when, determine the position be the frame in preset information transmit end position, institute
It is system information in Transmission system data frame and data message symbolic number sum to state k.
According to one embodiment of the invention, the parameter value in the method for reseptance 1000 is as follows：K is that 3780, N is 3.
Equally, detected using asynchronous correlator determine preset information position process as shown in figure 8, including,
By the flows of data signals received, the flows of data signals can be that the flows of data signals of non-demapping (is used for symbol
The synchronizing process of deinterleaving), without the LDPC flows of data signals (be used for channel LDPC decode synchronizing process) decoded or not
The data message stream (being used for the synchronizing process that channel NR is decoded) decoded through NR, the asynchronous correlation of data flow serial input first
Device (step 802), asynchronous correlator is in running order all the time, when asynchronous correlator output value is autocorrelation value (i.e. maximum)
When start counting up (step 804)；If continuous 3 times when being spaced 3780 timeticks asynchronous correlator output value be all from phase
Pass is worth, and it is the end position (step 806) that preset information is transmitted to determine the position.With first symbol clock position behind the position
Starting point is set to, the data message to after makees symbol deinterleaving, channel LDPC decodings or channel NR decodings (step 808).
It should be noted that N can k value can take other values according to different applications, the present invention does not limit N and k
Specific value.
Data signal receiving/transmission method
According to the present invention, a kind of data signal receiving/transmission method for being used to realize system synchronization, as shown in figure 11, figure are also provided
11 be the flow chart of the receiving/transmission method according to embodiments of the invention, and the receiving/transmission method 1100 includes：
1102. data flows for constituting many level symbols are divided into continuous data frame and are transmitted.
1104. add preset information in each data frame, for system synchronization, clock recovery, channel estimation and equilibrium
Device is trained；Wherein preset information is by the PN Sequence compositions of m.
1106. in each data frame add-on system information, for characterizing this frame of data information modulating mode, intertexture pattern
With LDPC encoder bit rates；Wherein system information is by adding the walsh Sequence compositions of j behind the two level deterministic signals of n；And
The system information of n+j is added after the preset information of m.
Interpolation data information in 1108. each data frames；Wherein preset information, system information and data message are formed merely
Single order circulation.Wherein, according to one embodiment of the invention, each parameter takes in data signal receiving/transmission method 1100 of the invention
Value is as follows：M is that 595, n is that 4, j is 32.
1110. detections determine the position of preset informations, with first symbol clock position after the preset information, as being
The beginning for information of uniting；
1112. detections determine the position of system information, with first symbol clock position after the system information, are used as number
It is believed that the beginning of breath；
1114. pairs of data messages carry out signal transacting.Data message progress signal transacting is deinterleaved including synchronizing symbol,
Channel is decoded and data scrambling code decoding.
The data signal receiving/transmission method 1100 of the present invention can be used for realizing that symbol is deinterleaved, channel is decoded and data scrambling code decoding
Synchronization.The synchronization that the data signal receiving/transmission method is used for channel decoding may include the channel LDPC solutions of digital TV ground transmission
Code, the synchronization of channel NR decodings.
According to one embodiment of the invention, the position of preset information is determined using asynchronous correlator, including：
By the asynchronous correlator of data flow serial input received；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are being spaced k timeticks
When asynchronous correlator output value all be autocorrelation value when, determine the position be the frame in preset information transmit end position, institute
It is system information in Transmission system data frame and data message symbolic number sum to state k.
According to one embodiment of the invention, the parameter value in the method for reseptance 1000 is as follows：K is that 3780, N is 3.
Equally, detected using asynchronous correlator determine preset information position process as shown in figure 8, including,
By the flows of data signals received, the flows of data signals can be that the flows of data signals of non-demapping (is used for symbol
The synchronizing process of deinterleaving), without the LDPC flows of data signals (be used for channel LDPC decode synchronizing process) decoded or not
The data message stream (being used for the synchronizing process that channel NR is decoded) decoded through NR, the asynchronous correlation of data flow serial input first
Device (step 802), asynchronous correlator is in running order all the time, when asynchronous correlator output value is autocorrelation value (i.e. maximum)
When start counting up (step 804)；If continuous 3 times when being spaced 3780 timeticks asynchronous correlator output value be all from phase
Pass is worth, and it is the end position (step 806) that preset information is transmitted to determine the position.With first symbol clock position behind the position
Starting point is set to, the data message to after makees symbol deinterleaving, channel LDPC decodings or channel NR decodings (step 808).
It should be noted that N can k value can take other values according to different applications, the present invention does not limit N and k
Specific value.
Summarize
Data signal receiving/transmission method of the present invention and system determine symbol deinterleaving, channel according to the position of preset information
The original position of LDPC decodings, channel NR decodings or data scrambling code decoding, system can realize symbolic solution according to the original position
Synchronization, the synchronization of channel LDPC decodings, the synchronization of channel NR decodings and the synchronization of data scrambling code decoding of intertexture, are respectively completed
Solve symbol interleaving, channel LDPC decodings, channel NR decodings or data scrambling code decoding.The present invention is same relative to 4 level sections in ATSC
For the catching method of step, the method for this PN related synchronizations has faster acquisition speed, simultaneously as gain related PN
Very big, antijamming capability is stronger.
Above-described embodiment, which is available to, to be familiar with person in the art to realize or using the present invention, be familiar with this area
Personnel can make various modifications or change, thus this to above-described embodiment without departing from the present invention in the case of the inventive idea
The protection domain of invention is not limited by above-described embodiment, and should meet inventive features that claims mention most
On a large scale.
Claims (24)
1. a kind of digital signal transmission method for being used to realize system synchronization, it is characterised in that including：
The data flow that many level symbols are constituted is divided into continuous data frame and is transmitted；
Preset information is added in each data frame, for system synchronization, clock recovery, channel estimation and balanced device instruction
Practice；
The add-on system information in each data frame, for characterize this frame of data information modulating mode, intertexture pattern and
LDPC encoder bit rates；
Interpolation data information in each data frame；Wherein described preset information, system information and data message are formed merely
Single order circulation.
2. the digital signal transmission method as claimed in claim 1 for being used to realize system synchronization, it is characterised in that described preset
Information is by the PN Sequence compositions of m.
3. the digital signal transmission method as claimed in claim 1 for being used to realize system synchronization, it is characterised in that the system
Information is by adding the walsh Sequence compositions of j behind two level signals of n；And described n+j system information is added in m
After the preset information of position.
4. the as claimed in claim 3 digital signal transmission method for being used to realize system synchronization, it is characterised in that the m is
595, n be that 4, j is 32.
5. a kind of digital signal reception method for being used to realize system synchronization as claimed in claim 1, it is characterised in that connect
The data signal of receipts at least includes preset information, system information and data message, and the method for reseptance includes：
Detection determines the position of preset information, with first symbolic information position after the preset information, is used as system information
Start；
Detection determines the position of system information, with first symbolic information position after the system information, is used as data message
Start；
Signal transacting is carried out to data message, and carries out LDPC decodings.
6. digital signal reception method as claimed in claim 5, it is characterised in that the position of described preset information uses phase
Device is closed to determine, including：
By the data flow serial input correlator received；
When correlator output value is autocorrelation value, start counting up, if continuous n times correlator when being spaced k timeticks
When output valve is all autocorrelation value, the end position that the position is preset information transmission in the frame is determined, the k is Transmission system
Symbolic number sum in data frame.
7. a kind of data signal receiving/transmission method for being used to realize system synchronization, it is characterised in that including：
When launching the data signal, the data flow that many level symbols are constituted is divided into continuous data frame and is transmitted；
Preset information is added in each data frame, for system synchronization, clock recovery, channel estimation and balanced device instruction
Practice；
The add-on system information in each data frame, for characterize this frame of data information modulating mode, intertexture pattern and
LDPC encoder bit rates；
Interpolation data information in each data frame；Wherein described preset information, system information and data message are formed merely
Single order circulation；
When receiving the data signal, detection determines the position of preset information, with first symbolic information after the preset information
Position, is used as the beginning of system information；
Detection determines the position of system information, with first symbolic information position after the system information, is used as data message
Start；
Signal transacting is carried out to data message.
8. data signal receiving/transmission method as claimed in claim 7, it is characterised in that
The preset information is by the PN Sequence compositions of m.
9. data signal receiving/transmission method as claimed in claim 7, it is characterised in that
The system information is by adding the walsh Sequence compositions of j behind two level signals of n；And described n+j system
Information is added after the preset information of m.
10. data signal receiving/transmission method as claimed in claim 9, it is characterised in that
The m is that 4, j is 32 for 595, n.
11. the data signal receiving/transmission method as any one of claim 7-10, it is characterised in that
The data signal receiving/transmission method is used to realize symbol deinterleaving, channel decoding and the synchronization of data scrambling code decoding.
12. data signal receiving/transmission method as claimed in claim 7, it is characterised in that
The data signal receiving/transmission method is used for the synchronization that channel is decoded, and includes the channel LDPC solutions of digital TV ground transmission
Code, the synchronization of channel NR decodings.
13. a kind of digital signal transmitters for being used to realize system synchronization, it is characterised in that including：
Data frame segmenting device, the data flow that many level symbols are constituted is divided into continuous data frame；
Data transmission device, the data frame is transmitted；
Preset information adding set, adds preset information, for system synchronization, clock recovery, letter in each data frame
Estimate and equalizer training in road；
System information adding set, the add-on system information in each data frame, for characterizing the modulation of this frame of data information
Pattern, intertexture pattern and LDPC encoder bit rates；
Interpolation data information in data message adding set, each data frame；Wherein described preset information, system information and
Data message forms simple single order circulation.
14. the digital signal transmitters as claimed in claim 13 for being used to realize system synchronization, it is characterised in that described preset
Information is by the PN Sequence compositions of m.
15. the digital signal transmitters as claimed in claim 13 for being used to realize system synchronization, it is characterised in that the system
Information is by adding the walsh Sequence compositions of j behind two level signals of n；And described n+j system information is added in m
After the preset information of position.
16. the as claimed in claim 15 digital signal transmitters for being used to realize system synchronization, it is characterised in that the m is
595, n be that 4, j is 32.
17. a kind of digital signal receiver for being used to realize system synchronization, it is characterised in that received digital signal is at least wrapped
Preset information, system information and data message are included, the receiver includes：
Preset information position determining means, detection determines the position of preset information, is believed with first symbol after the preset information
Position is ceased, the beginning of system information is used as；
System information position determining means, detection determines the position of system information, is believed with first symbol after the system information
Cease position, as the beginning of data message, the system information be used for characterize this frame of data information modulating mode, intertexture pattern and
LDPC encoder bit rates；
Processing data information device, carries out signal transacting, and carry out LDPC decodings to data message.
18. digital signal receiver as claimed in claim 17, it is characterised in that the preset information position determining means are
Asynchronous correlator, wherein,
The asynchronous correlator receives the data flow with serial input mode；
When asynchronous correlator output value is autocorrelation value, start counting up, if continuous n times are different when being spaced k timeticks
When walking correlator output value all for autocorrelation value, the end position that the position is preset information transmission in the frame is determined, the k is
Preset information, system information and data message symbolic number sum in Transmission system data frame.
19. a kind of data signal receive-transmit system for being used to realize system synchronization, it is characterised in that including：Digital signal transmitters,
Including,
Data frame segmenting device, the data flow that many level symbols are constituted is divided into continuous data frame；
Data transmission device, the data frame is transmitted；
Preset information adding set, adds preset information, for system synchronization, clock recovery, letter in each data frame
Estimate and equalizer training in road；
System information adding set, the add-on system information in each data frame, for characterizing the modulation of this frame of data information
Pattern, intertexture pattern and LDPC encoder bit rates；
Interpolation data information in data message adding set, each data frame；Wherein described preset information, system information and
Data message forms simple single order circulation；
Digital signal receiver, including,
Preset information position determining means, detection determines the position of preset information, is believed with first symbol after the preset information
Position is ceased, the beginning of system information is used as；
System information position determining means, detection determines the position of system information, is believed with first symbol after the system information
Position is ceased, the beginning of data message is used as；
Processing data information device, signal transacting is carried out to data message.
20. data signal receive-transmit system as claimed in claim 19, it is characterised in that
The preset information of preset information adding set addition is by the PN Sequence compositions of m.
21. data signal receive-transmit system as claimed in claim 19, it is characterised in that
The system information of system information adding set addition by addition j behind two level signals of n walsh sequences
Constitute；And described n+j system information is added after the preset information of m.
22. data signal receive-transmit system as claimed in claim 21, it is characterised in that
The m is that 4, j is 32 for 595, n.
23. the data signal receive-transmit system as any one of claim 19-22, it is characterised in that
The data signal receive-transmit system is used to realize symbol deinterleaving, channel decoding and the synchronization of data scrambling code decoding.
24. data signal receive-transmit system as claimed in claim 19, it is characterised in that
The data signal receive-transmit system is used for the synchronization that channel is decoded, and includes the channel LDPC solutions of digital TV ground transmission
Code, the synchronization of channel NR decodings.
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| CN201110150002.5A CN106953712B (en) | 2006-07-17 | 2006-07-17 | Digital signal transmitting and receiving system and method |
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| CN2006100289981A CN101110626B (en) | 2006-07-17 | 2006-07-17 | Digital signal emitting and receiving system and method thereof |
| CN201110150002.5A CN106953712B (en) | 2006-07-17 | 2006-07-17 | Digital signal transmitting and receiving system and method |
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| CN201110149831.1A Active CN103067117B (en) | 2006-07-17 | 2006-07-17 | Digital signal receive-transmit system and receiving/transmission method |
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| CN1617580A (en) * | 2003-11-13 | 2005-05-18 | 上海交通大学 | Signal transmission method in digital signal transmission system |
| CN1617579A (en) * | 2003-11-13 | 2005-05-18 | 上海交通大学 | Signal transmission method in digital TV ground broadcast transmission system |
| CN1638314A (en) * | 2004-02-06 | 2005-07-13 | 上海交通大学 | Signal transmission method of digital TV ground transmission system |
| CN1642276A (en) * | 2004-03-29 | 2005-07-20 | 上海交通大学 | Mixed transmission method in digital television ground troadcasting transmission system |
| CN1838728A (en) * | 2006-04-24 | 2006-09-27 | 上海交通大学 | Synchronous method for channel decodable bit interleave or rescrambling code in digital television ground transmission |
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| CN1852282A (en) * | 2006-04-24 | 2006-10-25 | 上海交通大学 | Channel decoding and symbol demapping synchronizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1617580A (en) * | 2003-11-13 | 2005-05-18 | 上海交通大学 | Signal transmission method in digital signal transmission system |
| CN1617579A (en) * | 2003-11-13 | 2005-05-18 | 上海交通大学 | Signal transmission method in digital TV ground broadcast transmission system |
| CN1638314A (en) * | 2004-02-06 | 2005-07-13 | 上海交通大学 | Signal transmission method of digital TV ground transmission system |
| CN1642276A (en) * | 2004-03-29 | 2005-07-20 | 上海交通大学 | Mixed transmission method in digital television ground troadcasting transmission system |
| CN1838728A (en) * | 2006-04-24 | 2006-09-27 | 上海交通大学 | Synchronous method for channel decodable bit interleave or rescrambling code in digital television ground transmission |
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| CN106953712B (en) | 2020-07-24 |
| HK1117657A1 (en) | 2009-01-16 |
| CN101110626B (en) | 2012-01-04 |
| CN101110626A (en) | 2008-01-23 |
| CN103067117A (en) | 2013-04-24 |
| CN103067117B (en) | 2015-08-05 |
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