CN106034244B - Signalling coding modulator approach and demodulation interpretation method and device - Google Patents

Signalling coding modulator approach and demodulation interpretation method and device Download PDF

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Publication number
CN106034244B
CN106034244B CN201510125240.9A CN201510125240A CN106034244B CN 106034244 B CN106034244 B CN 106034244B CN 201510125240 A CN201510125240 A CN 201510125240A CN 106034244 B CN106034244 B CN 106034244B
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Prior art keywords
code word
coding
extension
signaling
bit
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CN106034244A (en
Inventor
张文军
史毅俊
何大治
黄戈
徐洪亮
王尧
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Shanghai National Engineering Research Center of Digital Television Co Ltd
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Shanghai National Engineering Research Center of Digital Television Co Ltd
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Priority to CN201710094798.4A priority Critical patent/CN106878766A/en
Application filed by Shanghai National Engineering Research Center of Digital Television Co Ltd filed Critical Shanghai National Engineering Research Center of Digital Television Co Ltd
Priority to CN201510125240.9A priority patent/CN106034244B/en
Priority to CN201710091909.6A priority patent/CN106921469A/en
Priority to CA3158865A priority patent/CA3158865A1/en
Priority to EP16764207.3A priority patent/EP3270597B1/en
Priority to CA3158869A priority patent/CA3158869A1/en
Priority to CA2979574A priority patent/CA2979574C/en
Priority to PCT/CN2016/076129 priority patent/WO2016146027A1/en
Priority to KR1020177029291A priority patent/KR101964070B1/en
Priority to KR1020197008591A priority patent/KR102346340B1/en
Priority to KR1020197008585A priority patent/KR102347779B1/en
Priority to US15/558,184 priority patent/US10594435B2/en
Publication of CN106034244A publication Critical patent/CN106034244A/en
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Publication of CN106034244B publication Critical patent/CN106034244B/en
Priority to US17/652,927 priority patent/US11722243B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/003—Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation

Abstract

The present invention provides a kind of signalling coding modulator approach, demodulation coding method and devices, which comprises the following steps: is extended the code word that is expanded according to extension pattern table based on signaling, carries out predictive encoding to the extension code word and obtain coding codeword；After information bit part, coding codeword after displacement is got in return in being spliced to coding codeword to after verification bit section progress checksum location in coding codeword；Coding codeword after length according to signaling punchinges to coding codeword after displacement according to predetermined rule of punchinging；And carried out after the obtained tuple sequence of predetermined process carries out bit rotation to based on coding codeword after punchinging, be mapped as signaling symbols according to predetermined mapping ruler, the corresponding demodulation coding of receiving side, more efficiently, robust and computation complexity it is low.

Description

Signalling coding modulator approach and demodulation interpretation method and device
Technical field
The present invention relates to digital TV technology, in particular to the code modulating method of a kind of signaling and demodulation coding side Method and device.
Background technique
In existing broadcast communication standard, in DVB-T2 system, each physical frame includes signaling and data, Middle signaling indicates the information such as the coded modulation for each business that data are included, intertexture mode.The wherein threshold level of signaling Have to be lower than the threshold level for all business that data in the physical frame are included.Therefore the coded modulation of signaling, which should provide, compares number According to stronger protection, and spectrum efficiency high as far as possible should be also provided simultaneously.In addition, the length of signaling is that each physical frame is variable , therefore the coded modulation of signaling must also provide corresponding flexibility.
With the appearance of the large-data operations such as ultra high-definition, the threshold level of some business is also increased accordingly.Some business Threshold level under white noise channel has been more than 25dB even 30dB, then, prior art, which is difficult to provide, to be needed efficiently, flexibly Signalling coding modulation and demodulation interpretation method.
Summary of the invention
It is an object of the invention to provide corresponding efficient, flexible signalling coding for the business with higher threshold level Modulator approach and demodulation interpretation method and device.
To solve the above problems, the embodiment of the invention provides a kind of signalling coding modulator approaches, which is characterized in that including Following steps: the code word that is expanded is extended according to extension pattern table based on signaling, predictive encoding is carried out to the extension code word Obtain coding codeword；To in coding codeword verify bit section carry out checksum location after in being spliced to coding codeword information bit After part, coding codeword after displacement is got in return；Length according to signaling is according to predetermined rule of punchinging to coding codeword after displacement Coding codeword after being punchinged；And the obtained tuple sequence of predetermined process is carried out to based on coding codeword after punchinging After column carry out bit rotation, signaling symbols are mapped as according to predetermined mapping ruler.
Optionally, wherein be based on signaling extensions, to extension code word carry out predictive encoding step in, comprising: to signaling into Row Bose-Chaudhuri-Hocquenghem Code, resulting BCH code word is extended be expanded BCH code word as extension code word, will extension BCH code word into Row LDPC encodes to obtain LDPC code word as coding codeword.
Optionally, wherein resulting BCH code word was extended in the step of being expanded BCH code word based on signaling, is wrapped Include: the LDPC code word sub-block size Q for being included based on every a small group has length KLDPCExtension code word by KLDPC/ Q group Sequentially it is spliced, the length N of BCH code wordBCHIf complete expansion group number NPadGreater than zero, thenπ (0) group in BCH code word will be extended until π (NPad- 1) zero filling is organized；If remaining Extended bit numberGreater than zero, thenBy π (NPad) group preceding KLDPC-NBCH- QNPadA bit zero filling；BCH code word is inserted to extension BCH code word from front to back not by the bit of zero filling.
Optionally, wherein the in extension BCH code wordPass through scheduled extension Pattern table definition.
Optionally, wherein to extension code word carry out predictive encoding the step of in, include: with extend code word length and The length of coding codeword carries out that several check bits are calculated, and check bit is sequentially spliced to after extension code word, Predictive encoding is carried out again obtains coding codeword.
Optionally, wherein in carrying out the step of predictive encoding obtains coding codeword, which is used by making a reservation for The LDPC coding that LDPC code table determines.
Optionally, the first check bit is carried out to check bit part to replace to obtain the first displacement check bit；By first Check bit is divided into several continuous groups, and the position for exchanging group makes the preceding π of exchangep(k) a group after the conversion at For k-th of group, the second displacement check bit is obtained；And information bit is sequentially spliced with the second displacement check bit and is obtained Coding codeword after displacement.
Optionally, wherein make the preceding π of exchange in the position of exchange groupp(k) a group becomes k-th after the conversion In the step of group, corresponding table is replaced by predetermined position to determine.
Optionally, wherein predetermined rule of punchinging comprises the following steps: being punchinged according to the length of signaling with first and calculate public affairs Formula calculates first and punchinges number；It with the second calculation formula of punchinging calculates second according to the first number of punchinging and punchinges number；With And by the second last of coding codeword punching number bit remove, coding codeword after being punchinged.
Optionally, first punching calculation formula use:
First punchinges number
Wherein, first constant A is for making different K from second constant BsigWhen signalling coding modulator approach all have and connect Close threshold level and determine, BCH verification bit length be defined as Lp, the length of signaling is defined as Ksig, BCH volume is carried out to signaling Code, is extended the BCH code word that is expanded to resulting BCH code word, which is KLDPC, wherein first often The value of number A and second constant B are as follows:
Optionally, wherein in the step of to based on the tuple sequence that coding codeword progress predetermined process obtains after punchinging, Including zero removal added in being extended in coding codeword after punchinging, bit is carried out to coding codeword after acquired zero-suppress Demultiplexing obtains tuple sequence.
Optionally, the length for carrying out the resulting BCH code word of Bose-Chaudhuri-Hocquenghem Code by signaling is defined as NBCH, will be using the volume of LDPC The length of code code word and extension code word is respectively defined as NLDPCAnd KLDPC, the rule calculated first that predetermined will punching punchinges number It is defined as Npunc_temp,
Wherein, in the step of obtaining tuple sequence based on coding codeword after zero-suppressing, include: after zero-suppressing coding codeword by Column are sequentially written in one and include ηmodColumnIn capable matrix；It is suitable by row from the matrix Secondary reading, by the η in every a linemodA bit forms a tuple, is included The tuple sequence of a tuple.
Optionally, wherein predetermined mapping ruler includes: by tuple sequence after rotation according to comprising making a reservation for specific mapping parameters Mapping ruler table be mapped as signaling symbols.
In addition, the embodiment of the invention also provides a kind of signal demodulation interpretation methods, which is characterized in that including following step It is rapid: demapping is carried out according to predetermined mapping ruler to the one-to-one receiving end signaling symbols of signaling symbols phase with such as sending side Obtain log-likelihood ratio corresponding with tuple sequence after bit rotation；According in the signalling coding modulator approach of such as sending side Predetermined process, check bit displacement, step of punchinging are obtained and are such as sent out to log-likelihood ratio progress correspondingly displacement and the processing of predetermined solution Send the extension code word of side corresponding receiving end extension code word；And it is corresponding according to the signalling coding modulator approach of such as sending side Extension, predictive encoding step decoded to obtain signaling to receiving end extended code word.
In addition, the embodiment of the invention also provides a kind of signalling coding modulating devices characterized by comprising expanded mode Block: the code word that is expanded is extended according to extension pattern table based on signaling, predictive encoding is carried out to the extension code word and is compiled Code code word；Replacement module: in coding codeword verify bit section carry out checksum location after in being spliced to coding codeword information After bit section, coding codeword after displacement is got in return；Punching module: the length according to signaling is opposed according to predetermined rule of punchinging Change coding codeword after rear coding codeword is punchinged；And processing mapping block: to based on coding codeword after punchinging After carrying out the obtained tuple sequence progress bit rotation of predetermined process, signaling symbols are mapped as according to predetermined mapping ruler.
In addition, the embodiment of the invention also provides a kind of signal demodulation code translators characterized by comprising demapping Processing module carries out the one-to-one receiving end signaling symbols of signaling symbols phase with such as sending side according to predetermined mapping ruler Demapping obtains log-likelihood ratio corresponding with tuple sequence after bit rotation；Corresponding displacement solution processing module, according to such as hair The predetermined process in side in signalling coding modulating device, check bit displacement, step of punchinging is sent to carry out correspondingly log-likelihood ratio Displacement is handled with predetermined solution, obtains receiving end extension code word corresponding with such as sending side extension code word；And decoding module, root Receiving end extended code word is decoded according to the corresponding extension of signalling coding modulating device in such as sending side, predictive encoding step Obtain signaling.
Compared with prior art, technical solution of the present invention has the advantage that
The present invention carries out signaling using providing signaling as target for the high-throughput data business with higher threshold level A series of extension, is punchinged and mapping handles to obtain signaling symbols at check bit displacement, is not only for high-throughput data industry The signaling of business especially for the signaling of variable-length, provides a kind of efficient, robust signalling coding modulator approach.
Detailed description of the invention
Fig. 1 is the overall flow schematic diagram of signalling coding modulator approach in the embodiment of the present invention；
Fig. 2 is the idiographic flow schematic diagram of signalling coding modulator approach in the embodiment of the present invention；And
Fig. 3 is the flow diagram of signal demodulation interpretation method in the embodiment of the present invention.
Specific embodiment
Inventor has found that in the prior art, there is no for the higher threshold level (being greater than 25dB) under predetermined channel Business and the signalling coding modulation scheme that designs.
In view of the above-mentioned problems, inventor after study, provides a kind of signalling coding modulator approach and demapping decoding side Method, to signaling carry out it is a series of extension, check bit displacement, punching and mapping handle, and further design provide coding, school Test position and change and the particular techniques parameter such as correspond to, punching, mapping, come carry out efficiently, the signalling coding modulator approach of robust.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention Specific embodiment be described in detail.
Such as in DVB-T2 system, a Main Patterns are connecing for the LDPC code cooperation 256QAM mapping that code rate is 2/3 It receives thresholding and has reached 17dB to 18dB, as the continuous rising of power system capacity, such as the LDPC code that code rate is 2/3 cooperate The coded modulation scheme of 1024QAM mapping even cooperation 4096QAM mapping also will appear, and threshold level at this moment will reach 25dB even 30dB, it follows that the threshold level of data service is the coded modulation scheme determination based on system, the present invention Without limitation to the specific value of the threshold level of data service more than predetermined high threshold, in following embodiment, needle is just selected It is illustrated to the data service of 25dB threshold level is greater than under white noise channel.
Fig. 1 is the overall flow schematic diagram of signalling coding modulator approach in the embodiment of the present invention；
In embodiments of the present invention, the signalling coding modulator approach of transmitting terminal comprising the steps of:
Step S1-1: being extended the code word that is expanded based on signaling, carries out predictive encoding to the extension code word and is compiled Code code word；
Step S1-2: checksum location is carried out to coding codeword and gets coding codeword after displacement in return；
Step S1-3: the length according to signaling, which punchinges to coding codeword after displacement according to predetermined rule of punchinging, to be dug Coding codeword behind hole；And
Step S1-4: bit rotation is carried out to the obtained tuple sequence of predetermined process is carried out based on coding codeword after punchinging Afterwards, signaling symbols are mapped as according to predetermined mapping ruler.
From upper step S1-1 to step S1-4 it is found that signalling coding modulator approach carries out a series of extension, school to signaling Test position change, punching and mapping processing, further, as a kind of preferred example, in step S1-1 to the base of step S1-4 Supplement carries out following processing on plinth.I.e., signaling is scrambled first, then successively carry out Bose-Chaudhuri-Hocquenghem Code, extension, LDPC coding, Check bit is replaced, is zero-suppressed, bit demultiplexing, bit rotate and obtain signaling symbols with constellation mapping.Specifically, Fig. 2 is the present invention The idiographic flow schematic diagram of signalling coding modulator approach in embodiment, as shown in Figure 2:
Signalling coding modulator approach comprising the steps of:
Step S1-1*: being K by lengthsigThe signaling of bit is scrambled, and obtaining length is KsigBelieve after the scrambling of bit It enables.
Step S1-2*: Bose-Chaudhuri-Hocquenghem Code is carried out to signaling after scrambling, obtains 168 BCH check bits；And BCH is verified into ratio Signaling obtains length later as N after spy is spliced to scramblingBCH=KsigThe BCH code word of+168 bits.Wherein, specifically with Bose-Chaudhuri-Hocquenghem Code Illustrate the confirmation problem of check bit number, be exactly, the number (168) of the check bit be according to encoding characteristics (such as BCH characteristic) the whole Block Error Rate of signalling coding modulation has been taken into consideration to determine, such as due to 168 BCH check bit energy Mistake of the length less than 12 bits in the signaling of 6480 bits is corrected, and the number of bits of 12 bits is further base It, therefore, can be in LDPC code by the processing of this step S1-2* in what is determined for the whole Block Error Rate for improving signalling coding modulation On the basis of further protect signaling, thus effectively improve signalling coding modulation overall performance.
Step S1-3*: the BCH code word is extended to obtain length to be KLDPCThe extension BCH code word of=6480 bits.
Step S1-4*: carrying out LDPC coding to obtained extension BCH code word, and obtaining length is NLDPC=16200 bits LDPC code word.
Step S1-5*: the LDPC code word includes preceding KLDPCThe information bit part of bit and include rear NLDPC-KLDPCThan Special check bit part carries out check bit after check bit is replaced to check bit part, and will be after displacement Check bit is spliced to LDPC code word after information bit is replaced later.
Step S1-6*: according to the length (K of signalingsigBit) number of punchinging is calculated, and will be set with predetermined rule of punchinging The check bit chisel for changing the corresponding number of rear LDPC code word is gone, LDPC code word after being punchinged.
Step S1-7*: zero removal that will be added in extended operation in LDPC code word after described punching, after being zero-suppressed LDPC code word.
Step S1-8*: bit is carried out to LDPC code word after zero-suppressing and demultiplexes to obtain tuple sequence.Wherein, each tuple packet Containing ηmod=8 bits.
Step S1-9*: tuple sequence after bit is rotated is carried out to each tuple in resulting tuple sequence. And
Step S1-10*: tuple sequence after the bit is mapped as signaling symbols according to predetermined mapping ruler.
The extension process of above-mentioned steps S1-3* is specifically described as follows.In the present embodiment, step S1-3* includes Step in detail below:
Definition extension BCH code word is by KLDPC/ Q group is sequentially spliced, wherein every a small group includes Q bit, group Nepit number Q is exactly the sub-block size of LDPC code word, Q value 360, this KLDPC/ Q group is respectively formed as from front to back 0 group, the 1st group, until KLDPC/ Q-1 group.
If complete expansion group number NPadGreater than 0, whereinIt will be in extension BCH code word π (0) group is until π (NPad- 1) zero filling is organized, whereinBy following table 1 extension pattern table into Row definition.
If residual extension number of bitsGreater than 0, whereinBy π (NPad) group BeforeA bit zero filling；It is N by lengthBCHThe BCH code word of bit is inserted the extension BCH code word from front to back and is not had Have in the bit by zero filling.
Extension pattern in following table 1 is in capacity and LDPC code word information bit according to bit each in constellation mapping What the degree distribution co-design of different variable nodes went out, coded modulation performance can be effectively improved by optimization extension pattern.
Table 1: extension pattern table
To in the LDPC coded treatment of above-mentioned steps S1-4*, according to the extension BCH code word Generate NLDPC-KLDPCA check bitAnd check bit is sequentially spliced to the extension After BCH code word, LDPC code word is obtained.Step S1-4* comprising the following specific steps
Initialize pi=0 (i=0,1 ..., NLDPC-KLDPC-1)；
It adds up to the first row number in the LDPC code table using following table 2 as the check bit of address, defines first Collection composed by line number word is combined into Φ0, meet k ∈ Φ to all first0K executeThen meet k to all ∈Φ0K execute
Then meet k ∈ Φ to all0K execute
And so on, finally meet k ∈ Φ to all0K execute
It adds up, defines composed by two lines of numbers as the check bit of address to using the two lines of numbers in table 2 Collection is combined into Φ1, meet k ∈ Φ to all first1K executeThen meet k ∈ Φ to all1K execute
Then meet k ∈ Φ to all1K execute
And so on, finally meet k ∈ Φ to all1K execute
And so on, it is added up according to rows all in table to check bit, Zhi DaoRow, first to institute There is satisfactionK executeThen to all satisfactionsK It executes
And so on, finally to all satisfactionsK execute
It executesThen it executesThen it executesAnd so on, finally hold Row
Finally check bit is sequentially spliced to after the extension BCH code word, obtains LDPC code word.
Table 2:LDPC code table
The check bit replacement Treatment of above-mentioned steps S1-5* is specifically described as follows.In the present embodiment, step S1- 5* comprising the following specific steps
The first check bit is carried out to check bit to replace to obtain the first displacement verification ratio It is special
Wherein,
First displacement check bit is divided into continuouslyA group, wherein each group includes Q bit, The position of exchange group makes the preceding π of exchangep(k) a groupBecome after the conversion k-th small Group obtains the second displacement check bit,
Wherein, the group position before exchangeIn the displacement pair of 3 predetermined position of table It answers in table and defines；
Information bit and the second displacement check bit are sequentially spliced to LDPC code word after being replaced.
Sequence of punchinging in following table 3 is in capacity and LDPC code word check bit according to bit each in constellation mapping The degree distribution co-designs of different variable nodes go out, coded modulation can be effectively improved by optimization sequence of punchinging Energy.
Table 3: corresponding table is replaced in predetermined position
The processing of punchinging of above-mentioned steps S1-6* is specifically described as follows.In the present embodiment, step S1-6* includes Step in detail below:
According to the length K of signalingsigIt calculates first with the first formula of punchinging and punchinges number Npunc_temp, this first is punchinged public affairs Formula usesIn the present embodiment, the length of extension BCH code word is KLDPC= 6480, A, B takes constant,Wherein KLDPC-Ksig168 in -168 be the check bit (parity of BCH Bits number of bits L)p, wherein constant A and constant B's is to make different KsigWhen the signalling coding modulation scheme all have There is comparable threshold level and designs；
It punchinges number N according to firstpunc_tempIt calculates second with the second formula of punchinging and punchinges number Npunc, second chisel Hole formula uses:
By the last N of the LDPC code wordpuncA bit removal, LDPC code word after being punchinged.
It demultiplexes to obtain tuple sequence processing to the carry out bit of above-mentioned steps S1-8* to be specifically described as follows.At this In embodiment, step S1-8* comprising the following specific steps
LDPC code word after described zero-suppress, which is sequentially written in one by column, includesColumnRow Matrix in；
It is sequentially read from the matrix by row, by the η in every a linemodA bit forms a tuple, to be includedThe tuple sequence of a tuple.
The carry out bit rotation processing of above-mentioned steps S1-9* is specifically described as follows.In the present embodiment, step S1-9* comprising the following specific steps
Keep first tuple of tuple sequence constant；2nd tuple of tuple sequence is rotated into 1 bit, Yi Jixuan The 1st bit of tuple is the η of original tuple after turningmodA bit, the 2nd bit of tuple is the 1st of original tuple after rotation Bit, the 3rd bit of tuple is the 2nd bit of original tuple after rotation, and so on, the η of tuple after rotationmodBit For the η of original tuplemod- 1 bit；Similarly, the 3rd tuple of tuple sequence is rotated into 2 bits；Similarly, by tuple sequence 4th tuple of column rotates 3 bits；And so on, rotate all tuples in tuple sequence, tuple sequence after being rotated Column.
In other words, first tuple (tuple serial number y corresponding 0) for being just to maintain the tuple sequence is constant, by the member Y-th of tuple (tuple serial number y corresponding 1,2,3...) y-1 bit of rotation of group sequence, thus correspondingly rotates tuple sequence In all tuples, tuple sequence after being rotated.
It is worth noting that, ηMOD+ 1, the 2nd ηMODThe tuples rotation integer numbers η such as+1MODBit is equivalent to not rotate, ηMOD+ 2, the 2nd ηMODThe tuples such as+2 are equivalent to 1 bit of rotation.
The predetermined mapping ruler of above-mentioned steps S1-10* is specifically described as follows.In the present embodiment, step S1- 10* comprising the following specific steps
Each tuple of the tuple sequence is mapped as a signaling symbols, wherein mapping ruler such as following table 4 Shown in constellation mapping rule list, for example, it will be mapped as 1.2668+0.8034i when a tuple is " 00000001 ".
Table 4: constellation mapping rule list
In summary, by the way that the constellation mapping rule list of above-mentioned table 4 to be designed as to the mapping ruler of 256QAM, then, His for example extend pattern table and predetermined position replaces in corresponding table in the processing of punchinging of parameter value and step S1-6* the One A, B for punchinging formula takes the specific value of constant to be also changed therewith, for existing parameter, can effectively drop Low system carries out the computation complexity of coded modulation, demodulation coding.
In the present invention, not only comprising being compiled comprising fully step S1-1* to step S1-10* to signaling as above-mentioned Code modulation, also the property of can choose using above-mentioned steps S1-1* into step S1-10* it is a kind of or any at least two freedom Combination is to carry out coded modulation to signaling and correspondingly carries out demodulation coding, related a kind of or any at least two The specific steps of independent assortment can be obtained accordingly, be not listed one by one and be illustrated, and [1] therein is only included above-mentioned extension below The signalling coding modulator approach of processing, [2] include the signalling coding modulator approach of above-mentioned check bit replacement Treatment, [3] comprising upper State the signalling coding modulator approach for processing of punchinging, respectively for illustrate.
For the signalling coding modulator approach that [1] includes above-mentioned extension process: the embodiments of the present invention also provide A kind of signalling coding modulator approach, comprising the following steps:
Bose-Chaudhuri-Hocquenghem Code is carried out to signaling, the BCH code word that is expanded is extended to resulting BCH code word；And it will extension BCH code word is handled to obtain signaling symbols.
Wherein, if complete expansion group number NPadGreater than zero, π (0) group in BCH code word will be extended until π (NPad- 1) zero filling is organized；If residual extension number of bitsGreater than zero, by π (NPad) group preceding KLDPC-NBCH-QNPadA ratio Special zero filling；BCH code word is inserted to extension BCH code word from front to back not by the bit of zero filling.
Similarly,It is defined by the extension pattern table of above-mentioned table 1.
For the signalling coding modulator approach that [2] include above-mentioned check bit replacement Treatment: the embodiment of the present invention is also Provide a kind of signalling coding modulator approach, comprising the following steps:
It handles to obtain coding codeword by signaling；Checksum location is carried out to coding codeword and gets coding codeword after displacement in return； It is handled to obtain signaling symbols based on coding codeword after displacement.
Wherein, include information bit part and check bit part by coding codeword, check bit part is verified Check bit after bit permutation is replaced, and check bit after displacement is spliced to after information bit is replaced later and is encoded Code word.
The first check bit is carried out to check bit part to replace to obtain the first displacement check bit；By the first check bit It is divided into several continuous groups, before determining that the position of exchange group makes exchange by the corresponding table table 3 of predetermined position displacement πp(k) a group becomes k-th of group after the conversion, obtains the second displacement check bit；And by information bit and second Displacement check bit sequentially splice replaced after coding codeword.
Similarly, which replaces corresponding table and replaces corresponding table using the predetermined position in above-mentioned table 3.
For the signalling coding modulator approach that [3] include above-mentioned processing of punchinging: the embodiments of the present invention also provide A kind of signalling coding modulator approach, comprising the following steps:
Coding codeword after being handled based on signaling；Length according to signaling is according to predetermined rule of punchinging to place Coding codeword after coding codeword is punchinged after reason；And signaling symbols are obtained based on coding codeword after punchinging.
Wherein, make a reservation for punching rule, comprise the following steps: being calculated according to the length of signaling with the first calculation formula of punchinging First punchinges number；It with the second calculation formula of punchinging calculates second according to the first number of punchinging and punchinges number；And it will processing Afterwards the second last of coding codeword punching number bit removal.
In addition, the embodiment of the invention also provides a kind of methods of signal demodulation decoding.As shown in Fig. 3 of the invention A kind of flow diagram of the specific embodiment of signal demodulation decoding.With reference to Fig. 3, signal demodulation decoding includes the following steps:
Step S2-1: it is mutually received correspondingly to the signaling symbols as transmitted by above-mentioned signalling coding modulator approach End signaling symbols carry out demapping according to the predetermined mapping ruler and obtain logarithm corresponding with tuple sequence after bit rotation Likelihood ratio；Wherein the receiving end signaling symbols are that receiving end receives the symbol obtained such as above-mentioned signalling coding modulator approach Stream；
Step S2-2: according to the predetermined process in such as above-mentioned signalling coding modulator approach, check bit displacement, step pair of punchinging The log-likelihood ratio carries out correspondingly displacement and handles with predetermined solution, obtains receiving end corresponding with sending side extension code word and expands Show code word；And
Step S2-3: it is connect according to the corresponding extension of such as above-mentioned signalling coding modulator approach, predictive encoding step to described Receiving end extension code word is decoded to obtain signaling.
In sum, receiving side are as follows: demapping is carried out to the signaling symbols after channel, then to the logarithm after demapping Likelihood ratio carries out displacement corresponding with transmitting terminal and decodes with LDPC.Output is decoded to LDPC later and carries out BCH decoding and descrambling, Finally obtain signaling.
The step S2-1 to step S2-3 of receiving side correspond to sending side for upper step S1-1 to step S1-4 's.When signalling coding modulator approach not only to signaling carry out it is a series of extension, check bit displacement, punching and mapping at Reason, further, has also carried out such as step S1-1* at least one any supplement process into step S1-10*, such as to letter Order is scrambled, then successively carry out Bose-Chaudhuri-Hocquenghem Code, extension, LDPC coding, check bit replace, zero-suppress, bit demultiplex, bit When rotation is with constellation mapping, then, correspondingly, the signal demodulation decoding of receiving side has step in detail below.
Step S2-2 includes: being replaced, is punchinged according to the LDPC coding rule of transmitting terminal, check bit, bit demultiplexes and ratio Special pivot rule carries out corresponding displacement to the log-likelihood ratio and decodes with LDPC, obtains opposite with the extension BCH code word The receiving end extension BCH code word answered.
Step S23: BCH is carried out to receiving end extension BCH code word according to the scrambling of transmitting terminal, extension, Bose-Chaudhuri-Hocquenghem Code rule and is translated Code, descrambling obtain the signaling.
It should be noted that corresponding displacement is the check bit displacement for corresponding respectively to transmitting terminal, chisel in step S2-2 Hole, bit demultiplexing and bit pivot rule, concrete methods of realizing is not necessarily required to completely in accordance with opposite with transmitting terminal Sequence carries out, and can pass through various transformation or the sequence of Binding change specific steps.The method and transmitting terminal of LDPC decoding LDPC coding rule is corresponding.
In step 2-3, the descrambling is scrambling and the extension rule for corresponding respectively to transmitting terminal, specific implementation Method is not necessarily required to carry out completely in accordance with the sequence opposite with transmitting terminal, can specifically be walked by various transformation or Binding change Rapid sequence.The method of BCH decoding is corresponding with the Bose-Chaudhuri-Hocquenghem Code rule of transmitting terminal.
Especially, spread step, the check bit displacement step, predetermined rule of punchinging used corresponding to signal demodulation interpretation method Then and related parameter, table, formula etc. correspond respectively in above-described embodiment used by signalling coding modulator approach, no It repeats and repeats.
In addition, the embodiment of the invention also provides a kind of devices of signalling coding modulation, comprising: expansion module: based on letter It enables and is extended the code word that is expanded according to extension pattern table, predictive encoding is carried out to the extension code word and obtains coding codeword；It sets Change the mold block: in coding codeword verify bit section carry out checksum location after in being spliced to coding codeword information bit part it Afterwards, coding codeword after displacement is got in return；Punching module: the length according to signaling is according to predetermined rule of punchinging to encoding code after displacement Coding codeword after word is punchinged；And processing mapping block: book office is carried out to based on coding codeword after punchinging After managing obtained tuple sequence progress bit rotation, signaling symbols are mapped as according to predetermined mapping ruler.
In addition, include: demapping processing module the embodiment of the invention also provides a kind of device of signal demodulation decoding, it is right Demapping is carried out according to predetermined mapping ruler with the one-to-one receiving end signaling symbols of signaling symbols phase of such as sending side to obtain Log-likelihood ratio corresponding with tuple sequence after bit rotation；Corresponding displacement solution processing module, according to such as above-mentioned signalling coding Predetermined process, check bit displacement, step of punchinging in modulating device carry out correspondingly displacement and predetermined Xie Chu to log-likelihood ratio Reason obtains receiving end extension code word corresponding with such as sending side extension code word；And decoding module, it is compiled according to such as above-mentioned signaling The corresponding extension of code modulating device, predictive encoding step are decoded to obtain signaling to receiving end extended code word.
In the device of the modulation of signalling coding provided in this implementation and the device and above-described embodiment of signal demodulation decoding Signalling coding modulator approach, signalling coding modulator approach institute difference are corresponding, then possessed structure and technology are wanted in device Element can accordingly be converted by generation method and be formed, and be repeated no more in this description will be omitted.
Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair Bright technical solution makes possible variation and modification, therefore, anything that does not depart from the technical scheme of the invention, and according to the present invention Technical spirit any simple modifications, equivalents, and modifications to the above embodiments, belong to technical solution of the present invention Protection scope.

Claims (16)

1. a kind of signalling coding modulator approach, which comprises the following steps:
It is extended the code word that is expanded according to extension pattern table based on signaling, predictive encoding is carried out to the extension code word and is compiled Code code word；
To in the coding codeword verify bit section carry out checksum location after in being spliced to the coding codeword information bit After part, coding codeword after being replaced；
Thus length computation first according to the signaling, which is punchinged, number and to be calculated second and punchinges number, then will encode after displacement The last described second bit for punchinging number removes in code word, coding codeword after being punchinged；And
After based on the coding codeword progress obtained tuple sequence of predetermined process is ranked up after described punching, according to described pre- Determine mapping ruler and is mapped as signaling symbols.
2. signalling coding modulator approach as described in claim 1, it is characterised in that:
Wherein, signaling extensions are being based on, the extension code word are being carried out in predictive encoding step, comprising:
Bose-Chaudhuri-Hocquenghem Code is carried out to the signaling, the BCH code word that is expanded is extended as the extension to resulting BCH code word Code word,
Extension BCH code word progress LDPC is encoded to obtain LDPC code word as the coding codeword.
3. signalling coding modulator approach as claimed in claim 2, it is characterised in that:
Wherein, resulting BCH code word was extended in the step of being expanded BCH code word based on the signaling, comprising:
Based on the LDPC code word sub-block size Q that every a small group is included, there is length KLDPCThe extension code word by KLDPC/ Q Group is sequentially spliced, the length N of the BCH code wordBCH,
If complete expansion group number NPadGreater than zero, thenThe π in BCH code word will be extended (0) group is until π (NPad- 1) zero filling is organized；
If residual extension number of bitsGreater than zero, thenBy π (NPad) group Preceding KLDPC-NBCH-QNPadA bit zero filling；
The BCH code word is inserted into the extension BCH code word not by the bit of zero filling from front to back.
4. signalling coding modulator approach as claimed in claim 3, it is characterised in that:
Wherein, π (0) group in the extension BCH code word, π (1) group ...,Group passes through the extension pattern table Definition, the extension pattern table include:
Extend pattern table
5. signalling coding modulator approach as described in claim 1, it is characterised in that:
Wherein, in the step of carrying out predictive encoding to the extension code word, include:
Be calculated several check bits with the length of the length of the extension code word and the coding codeword, and by institute It states check bit to be sequentially spliced to after the extension code word, then carries out predictive encoding and obtain the coding codeword.
6. signalling coding modulator approach as claimed in claim 5, it is characterised in that:
Wherein, in carrying out the step of predictive encoding obtains the coding codeword, which is encoded using LDPC, institute's foundation LDPC code table include:
LDPC code table
7. signalling coding modulator approach as described in claim 1, it is characterised in that:
Wherein, the first check bit is carried out to the check bit part to replace to obtain the first displacement check bit；
First check bit is divided into several continuous groups, the position for exchanging group makes the preceding π of exchangep(k) a group exists Become k-th of group after transformation, obtains the second displacement check bit；And
Information bit and the second displacement check bit are sequentially spliced to coding codeword after obtaining the displacement.
8. signalling coding modulator approach as claimed in claim 7, it is characterised in that:
Wherein, make the preceding π of exchange in the position of exchange groupp(k) a group became after the conversion in the step of k-th of group, Corresponding table is replaced by predetermined position to determine:
Replace corresponding table in predetermined position
9. signalling coding modulator approach as described in claim 1, it is characterised in that:
Wherein, the predetermined rule of punchinging, comprises the following steps:
It calculates first with the first calculation formula of punchinging according to the length of the signaling and punchinges number；
It with the second calculation formula of punchinging calculates second according to the first number of punchinging and punchinges number；And
The bit that last described the second of the coding codeword punchinges number is removed, coding codeword after described punching is obtained.
10. signalling coding modulator approach as claimed in claim 9, it is characterised in that:
Described first punching calculation formula use:
Described first punchinges number
Wherein, first constant A is for making different K from second constant BsigShi Suoshu signalling coding modulator approach, which all has, to connect Close threshold level and determine,
BCH verification bit length is defined as Lp, the length of the signaling is defined as Ksig,
Bose-Chaudhuri-Hocquenghem Code is carried out to the signaling, the BCH code word that is expanded is extended to resulting BCH code word, the extension BCH code Word length is KLDPC,
The value of first constant A and second constant B are as follows:
11. signalling coding modulator approach as described in claim 1, it is characterised in that:
Wherein, in the step of coding codeword carries out the tuple sequence that predetermined process obtains after to based on described punching, including will It is described punching after zero removal added in described be extended in coding codeword, coding codeword after acquired zero-suppress is compared Particular solution is multiplexed to obtain tuple sequence.
12. signalling coding modulator approach as claimed in claim 11, it is characterised in that:
The length for carrying out the resulting BCH code word of Bose-Chaudhuri-Hocquenghem Code by the signaling is defined as NBCH, will be using the coding of LDPC The length of code word and the extension code word is respectively defined as NLDPCAnd KLDPC, by predetermined calculated first chisel of rule of punchinging Hole number is defined as Npunc_temp,
Wherein, in the step of obtaining the tuple sequence based on coding codeword after zero-suppressing, include:
Coding codeword after described zero-suppress is sequentially written in one by column and includes ηmodColumn In capable matrix；
It is sequentially read from the matrix by row, by the η in every a linemodA bit forms a tuple, is includedThe tuple sequence of a tuple.
13. signalling coding modulator approach as described in claim 1, it is characterised in that:
Wherein, the predetermined mapping ruler includes: that tuple sequence after rotation is mapped as the letter according to following mapping ruler table Enable symbol:
Mapping ruler table
14. a kind of signal demodulation interpretation method, which comprises the following steps:
It is advised to the one-to-one receiving end signaling symbols of signaling symbols phase as described in claim 1 according to the predetermined mapping It then carries out demapping and obtains log-likelihood ratio corresponding with tuple sequence after sequence；
According to predetermined process, the check bit in signalling coding modulator approach as described in the appended claim 1 are replaced, step of punchinging is to institute It states log-likelihood ratio and carries out correspondingly displacement and the processing of predetermined solution, obtain corresponding with extension code word as described in claim 1 Receiving end extends code word；And
According to the corresponding extension of signalling coding modulator approach as described in the appended claim 1, predictive encoding step to the reception End extension code word is decoded to obtain signaling.
15. a kind of signalling coding modulating device characterized by comprising
Expansion module: the code word that is expanded is extended according to extension pattern table based on signaling, which is made a reservation for Coding obtains coding codeword；
Replacement module: in the coding codeword verify bit section carry out checksum location after in being spliced to the coding codeword After information bit part, coding codeword after being replaced；
Punching module: thus the length computation first according to the signaling, which is punchinged, number and to be calculated second and punchinges number, then will The last described second bit for punchinging number removes in coding codeword after displacement, coding codeword after being punchinged；And
Processing mapping block: it is ranked up to the obtained tuple sequence of predetermined process is carried out based on coding codeword after described punching Afterwards, signaling symbols are mapped as according to the predetermined mapping ruler.
16. a kind of signal demodulation code translator characterized by comprising
Demapping processing module, to signaling symbols as claimed in claim 15 mutually one-to-one receiving end signaling symbols according to Demapping, which is carried out, according to the predetermined mapping ruler obtains log-likelihood ratio corresponding with tuple sequence after sequence；
Corresponding displacement solution processing module, according to the predetermined process in signalling coding modulating device as claimed in claim 15, school Test that position is changed, step of punchinging carries out correspondingly displacement to the log-likelihood ratio and handles with predetermined solution, obtain with such as claim The corresponding receiving end of the 15 extension code words extends code word；And
Decoding module, according to the corresponding extension of signalling coding modulating device as claimed in claim 15, predictive encoding step Receiving end extension code word is decoded to obtain signaling.
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