CN107276721A - Code modulating method and information processing method - Google Patents
Code modulating method and information processing method Download PDFInfo
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- CN107276721A CN107276721A CN201710457278.5A CN201710457278A CN107276721A CN 107276721 A CN107276721 A CN 107276721A CN 201710457278 A CN201710457278 A CN 201710457278A CN 107276721 A CN107276721 A CN 107276721A
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- 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
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
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- 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
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- 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
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- 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
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
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- 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
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- 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
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- 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
- H04L1/0071—Use of interleaving
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Abstract
The invention provides a kind of code modulating method and information processing method, coded modulation is carried out to bit stream, it is characterised in that including：At least two bit streams in bit stream group are encoded respectively, Bit Interleave is carried out and are merged and time-interleaved with predetermined number L bits, bit group flow filament is respectively obtained；Each bit constituent element in all bit group flow filaments is spliced respectively successively, so as to be sequentially formed as each bit combination in bit group interflow；And bit combination stream map to obtain emitting side symbol stream according to predetermined constellation mapping rule；Correspondingly, demapping is carried out to receiving side symbol stream, extracts the log-likelihood ratio matched with bit stream, form log-likelihood ratio constituent element stream；And be deinterleaved based on scheduled time interlacing rule, predetermined bit interlacing rule, and row decoding is entered based on predictive encoding rule, recovery obtains at least one bit stream.
Description
The application is the divisional application of original bill, the application number 201410443294.5 of original bill, 2014 applyings date September 2 days,
Invention and created name " code modulating method, demodulation coding method and information processing method ".
Technical field
The present invention relates to coding digital information transmission field, more particularly to a kind of code modulating method and information processing side
Method.
Background technology
Coded modulation, demodulation coding technology are one of core technologies in communication system, to coded modulation, demodulation coding skill
The improvement of art can significantly improve the transmittability of communication system or effectively reduce threshold level.
Many broadcast systems, the system such as DVB-S2, DVB-T2, DTMB and DVB-NGH can be related to coded modulation,
Demodulation coding technology, for example, more advanced low density parity check code (LDPC) coding techniques and constellation mapping are handed over bit
The technology of knitting, which is combined, to be used, so as to effectively improve the transmission performance of broadcast system.
As flexibility, the cost-effectiveness requirement more and more higher of service operation are, it is necessary to which communication system is supported：In a frequency range
Simultaneous transmission at least one there is the business of different service quality demand.Such as one is the program stream and one for being directed to fixed reception
Individual is that for the mobile program stream received, or it for the program stream of outdoor reception and one is to be directed to indoor reception that one, which is,
Program stream.
In order to support the broadcast of such mixed mode to transmit, it is generally the case that transmitting terminal is carried out not to different program streams
It is assigned to the coded modulation of pattern, and by different program streams on different running time-frequency resources.Corresponding, receiving terminal can be from
Launched baseband symbol stream is extracted on corresponding running time-frequency resource, and each program stream is recovered by demodulation coding.However, by
Different coded modulation schemes is used in different program streams, can also have different coverage or threshold level, then, from
Theory analysis is it is known that the transmission method being mapped to using above-mentioned different program streams on different running time-frequency resources is sometimes to reach
To the optimal availability of frequency spectrum.
The content of the invention
The problem of present invention is solved is the availability of frequency spectrum for effectively improving communication system, improves the transmission energy of communication system
Power, effectively reduce threshold level.
To solve the above problems, the embodiments of the invention provide a kind of code modulating method, coding tune is carried out to bit stream
System, it is characterised in that including：At least two bit streams in bit stream group are encoded, with pre- with predictive encoding rule respectively
Determine Bit Interleave rule to carry out Bit Interleave and merge and carry out with scheduled time interlacing rule with predetermined number L bits
It is time-interleaved, respectively obtain bit group flow filament；Each bit constituent element in all bit group flow filaments is spliced respectively successively, from
And be sequentially formed as each bit combination in bit group interflow；And bit combination stream is carried out according to predetermined constellation mapping rule
Mapping obtains emitting side symbol stream.
Optionally, each bit constituent element is spliced respectively in accordance with predetermined combinations splicing rule successively, described predetermined group
It is based on predictive encoding regular and predetermined constellation mapping rule, and to be based on to be merged and connect rule：Included in bit stream group
The number of bit stream；The spectrum efficiency of each bit stream；And threshold level of each bit stream under predetermined channel is determined,
The bit as predetermined number L shared by determining each bit constituent element respectively in bit combination by predetermined combinations splicing rule
Number and arrangement position.
Optionally, the predetermined combinations splicing rule is included：Determined by predetermined constellation mapping rule in bit combination
Whole number of bits；In same bit stream group under the threshold level of different bit streams, each in bit combination is calculated respectively
Average Mutual value between bit, to draw Average Mutual corresponding relation；And compare the Average Mutual corresponding relation,
Spectrum efficiency and default code check with reference to needed for each bit stream, predetermined number is determined according to predetermined computation multilevel iudge rule
L and arrangement position.
Optionally, the predetermined computation multilevel iudge rule is included：By Average Mutual corresponding relation, in bit combination
In several bits are selected in advance to distinguish matching transmission each bit stream；By several bits corresponding to the bit stream specified
Average Mutual value is calculated to obtain mutual information and value；Pass through the pre- of the amount of bits of several bits and each bit stream
If code check calculates the actual capacity of each bit stream；And whether be not more than by the actual capacity for comparing each bit stream
Mutual information and value, to judge whether the predetermined number L and arrangement position of several bits selected in advance meet each bit stream
Transmission process demand.
The embodiment of the present invention additionally provides a kind of information processing method, and the bit stream group to transmitting terminal is handled, and it is special
Levy and be, including：By at least one bit stream group according to be encoded as described above modulator approach carry out coded modulation for it is corresponding at least
One emitting side symbol stream, also, at least one emitting side coded modulation information and other signalings are combined and compiled respectively
Code modulation obtains signaling symbols stream；And all emitting side symbol streams and signaling symbols stream are subjected to framing and base band symbol is generated
Number stream, wherein, emitting side coded modulation packet containing predictive encoding described above rule, predetermined bit interlacing rule, it is pre- regularly
Between interlacing rule, predetermined combinations splicing rule and predetermined constellation mapping rule.
The embodiment of the present invention additionally provides a kind of information processing method, and the bit stream group to receiving terminal is handled, and it is special
Levy and be, including：Baseband symbol stream is received, the baseband symbol stream is that the information processing method of above-mentioned transmitting terminal is obtained；Recover
Corresponding with emitting side symbol stream, emitting side coded modulation information and by channel receiving side symbol stream and receiving side coding are adjusted
Information processed；And side symbol stream is received according to receiving side coded modulation information butt joint according to demodulation coding method be demodulated decoding,
At least one bit stream is obtained, wherein, demodulation coding method has steps of：Based on predetermined base demapping rule to receiving
Side symbol stream carries out demapping；The log-likelihood ratio for extracting and matching with bit stream is split, log-likelihood ratio constituent element stream is formed；
And deinterleave rule based on scheduled time deinterleaving rule, predetermined bit and be deinterleaved, and based on predetermined decoding rule
Enter row decoding, recovery obtains at least one bit stream.
The embodiment of the present invention additionally provides a kind of information processing method, and the bit stream group to receiving terminal is handled, and it is special
Levy and be, including：Baseband symbol stream is received, the baseband symbol stream is obtained by the information processing method of above-mentioned transmitting terminal；Recover
Go out corresponding with emitting side symbol stream, emitting side coded modulation information and by channel receiving side symbol stream and receiving side to encode
Modulation intelligence；And side symbol stream is received according to receiving side coded modulation information butt joint be demodulated and translate according to demodulation coding method
Code, obtains at least one bit stream, wherein, demodulation coding method has steps of：Rule is deinterleaved based on the scheduled time right
Receiving side symbol stream is deinterleaved；Demapping is carried out based on predetermined base demapping rule；Fractionation is extracted and bit stream phase
The log-likelihood ratio of matching, forms log-likelihood ratio constituent element stream；And based on predetermined bit deinterleave rule be deinterleaved, base
Enter row decoding in predetermined decoding rule, recovery obtains at least one bit stream.
The embodiment of the present invention additionally provides a kind of demodulation coding method, and demodulation coding goes out bit stream, it is characterised in that bag
Include：Demapping is carried out to receiving side symbol stream, the receiving side symbol stream is emitting side symbol stream phase in above-mentioned code modulating method
Correspondence recovery is obtained；The log-likelihood ratio matched with bit stream is extracted, log-likelihood ratio constituent element stream is formed；And based on pre-
Fix time interlacing rule, predetermined bit interlacing rule is deinterleaved, and enters row decoding based on predictive encoding rule, is recovered
To at least one bit stream.
The embodiment of the present invention additionally provides a kind of demodulation coding method, and demodulation coding goes out bit stream, it is characterised in that bag
Include：Rule is deinterleaved based on the scheduled time to be deinterleaved receiving side symbol stream, the receiving side symbol stream is by above-mentioned coding
The corresponding recovery of emitting side symbol stream is obtained in modulator approach；Demapping is carried out based on predetermined base demapping rule；Fractionation is carried
The log-likelihood ratio matched with bit stream is taken out, log-likelihood ratio constituent element stream is formed；And based on predetermined bit interlacing rule
It is deinterleaved, enters row decoding based on predictive encoding rule, recovery obtains at least one bit stream.
Compared with prior art, technical solution of the present invention has the advantages that：
Because according to code modulating method involved in the present invention, demodulation coding method and information processing method, transmitting
End is to having at least two bit streams (i.e. program stream) of different service quality requirement to be encoded respectively in bit stream group, bit
Interweave and merged with predetermined number L bits, carry out again time-interleaved, respectively obtain bit group flow filament；To all bit group flow filaments
In each bit constituent element mutually splice respectively successively so that be sequentially formed for bit group interflow in each bit combination；And contrast
Spy's combination stream progress, which maps, obtains emitting side symbol stream.Corresponding, receiving terminal by carrying out, extracted, demodulation is translated by corresponding fractionation
Code, recovery obtains at least one corresponding bit stream (i.e. program stream).Thus it is possible to realize that simultaneous transmission is more in same frequency range
The program stream of individual different service quality requirement, effectively improves the availability of frequency spectrum of system.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of information processing method for transmitting terminal in embodiment of the invention；
Fig. 2 is the block diagram of the information process of transmitting terminal in embodiment of the invention；
Fig. 3 is a kind of schematic flow sheet of code modulating method in embodiment of the invention
Fig. 4 is the block diagram of coded modulation process in embodiment of the invention；
Fig. 5 is a kind of schematic flow sheet of information processing method for receiving terminal in embodiment of the invention；
Fig. 6 is the block diagram of the information process of receiving terminal in embodiment of the invention；
Fig. 7 is a kind of schematic flow sheet of demodulation coding method in embodiment of the invention；
Fig. 8 is the block diagram of demodulation coding process in embodiment of the invention；And
Fig. 9 is the block diagram of demodulation coding process in variation of the invention.
Embodiment
Inventor has found in the prior art, to the coded modulation of different bit streams (i.e. program stream) progress different mode, and
Mapping is assigned on different running time-frequency resources such information processing method and is sometimes and is unable to reach the optimal availability of frequency spectrum.
In view of the above-mentioned problems, inventor is by research, there is provided a kind of code modulating method, demodulation coding method and letter
Processing method is ceased, because being encoded, Bit Interleave and being merged with predetermined number L bits respectively at least two bit streams
Carry out again afterwards time-interleaved, respectively obtain bit group flow filament, each bit constituent element in all bit group flow filaments is entered respectively successively
Row splicing is so as to be sequentially formed as each bit combination in bit group interflow；And the bit combination stream is mapped, so that
The bit stream (i.e. program stream) of the multiple different service quality requirements of simultaneous transmission in same frequency range can be realized, so that effectively
The availability of frequency spectrum of raising system.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.
The embodiments of the invention provide a kind of information processing method.Be as shown in Figure 1 the present invention embodiment in
A kind of schematic flow sheet of information processing method for transmitting terminal.
With reference to Fig. 1, the information processing method for transmitting terminal comprises the following steps：
Step S11：At least one bit stream group is carried out coding tune by sub-step S11a according to following code modulating methods
At least one corresponding emitting side symbol stream is made as, also, sub-step S11b respectively believes at least one emitting side coded modulation
Cease and other signalings are combined and coded modulation obtains signaling symbols stream；And
Step S12：All emitting side symbol streams and signaling symbols stream are subjected to framing and baseband symbol stream is generated.
Fig. 2 is the block diagram of the information process of transmitting terminal in embodiment of the invention.Below by way of referring to Fig. 2
Information processing method in above-mentioned Fig. 1 is illustrated.
By n hybrid coding modulation module, according to n emitting side coded modulation information MSkRespectively by n bit stream group
AkCoded modulation is carried out, is corresponding n emitting side symbol stream BSk。
In addition, respectively by emitting side coded modulation information MSkWith n other signalings SkIt is combined to form corresponding n
Combined signalling, and coded modulation obtains signaling symbols stream FS.Wherein, with each emitting side coded modulation information MSkRelated its
He is signaling SkInclude the information of the running time-frequency resource shared by the symbol stream, it is many which orthogonal frequency is such as these symbol streams be stored in
In road multiplexing (OFDM) symbol, the information to the type of bit stream (program source), e.g. TS streams or IP streams can also be included,
Etc..By all emitting side symbol stream BS exported by hybrid coding modulation modulekFraming is carried out with signaling symbols stream FS simultaneously
Generate baseband symbol stream FB.
The embodiment of the present invention additionally provides a kind of code modulating method.Fig. 3 is one kind in embodiment of the invention
The schematic flow sheet of code modulating method.
Fig. 3 code modulating method is code modulating method involved in above-mentioned steps S11a.In the present invention, own
Bit stream group AkIn at least one bit stream group coded modulation carried out by such as Fig. 3 code modulating method sent out accordingly
Side symbol stream BS is penetrated, is applied in combination, other bit stream groups remain to carry out coded modulation by other code modulating methods.
Code modulating method with reference to shown in Fig. 3 comprises the following steps：
Step S11a-1：At least two bit streams in bit stream group are encoded, with pre- with predictive encoding rule respectively
Determine Bit Interleave rule to carry out Bit Interleave and merge and carry out with scheduled time interlacing rule with predetermined number L bits
It is time-interleaved, respectively obtain bit group flow filament；
Step S11a-2：Each bit constituent element in all bit group flow filaments is mutually spliced respectively successively, so as to be sequentially formed
For each bit combination in bit group interflow；And
Step S11a-3：The bit combination stream map to obtain emitting side symbol according to predetermined constellation mapping rule
Stream.
Fig. 4 is the block diagram of coded modulation process in embodiment of the invention.By Fig. 4 to one in above-mentioned Fig. 3
Bit stream group A1In code modulating method be specifically described, bit stream group A is omitted herein2To bit stream group AnBased on phase
With the repeat specification of principle.In the present embodiment, each bit stream group can be distinguished with different satellite TV's programs, same bit stream
Different bit streams can be distinguished with different reception patterns in group, such as first satellite TV (A1) fixed reception program stream (a1,1)、
The mobile reception program stream (a of first satellite TV1,2), second satellite TV (A2) outdoor reception program stream (a2,1) etc..
In bit stream group A1In, by y bit stream aK, iCoded modulation is carried out respectively, and different bit streams can be according to not
Same is encoded with predictive encoding rule, Bit Interleave is carried out with predetermined bit interlacing rule and with predetermined number L ratios respectively
Spy merges and time-interleaved with the progress of scheduled time interlacing rule, respectively obtains corresponding y the second bit group flow filaments
FZ1, i2。
Below for bit stream a1,1It is specifically described, bit stream a is omitted herein1,2To bit stream a1, yBased on identical
The repeat specification of principle.
To bit stream a1,1According to predictive encoding rule m1,11Encoded, obtain corresponding first bit stream F1,11.Coding
BCH code, LDPC code, RS codes and their cascade can be used in pattern, and this is not limited by the present invention.Coding module is according to predetermined
Coding rule m1,11By bit stream a1,1It is divided into the message bit stream block one by one of fixed size, then by each message bit stream
Block is encoded to first bitstream block, so as to obtain the first bit stream F1,11。
To first bit stream F1,11According to predetermined bit interlacing rule m1,12Carry out Bit Interleave and obtain the second bit stream,
And by second bit stream with predetermined number L1,1(LK, i) bit be combined merging, obtain corresponding first bit group
Flow filament FZ1,11。
Concrete processing procedure is that Bit interleaving block is according to predetermined bit interlacing rule m1,12By each the first bit stream
Block interleaving is second bitstream block, and second bitstream block is obtained by the order for exchanging the bit in first bitstream block
Arrive, so as to obtain the second bit stream, then Bit interleaving block by the second bit stream according to predetermined number LK, iIndividual bit is one group
Merging is combined, the first bit group flow filament FZ is obtained1,11.First bit group flow filament FZ1,11In each element include LK, i
Bit in individual second bit stream.Wherein, predetermined bit interlacing rule m1,12Include code check, code length, order of modulation, LK, iDeng letter
Breath.
To the first bit group flow filament FZ1,11According to time-interleaved regular m1,13Progress is time-interleaved, that is, changes the first bit group
Flow filament FZ1,11In precedence between each bit constituent element, so as to obtain corresponding second bit group flow filament FZ1,12。
So far, bit stream a1,1, bit stream a1,2To bit stream a1, yRespectively obtain corresponding second bit group flow filament FZ1,12、
Second bit group flow filament FZ1,22To the second bit group flow filament FZ1, y2。
Above-mentioned all second bit group flow filament FZK, i2It is with predetermined combinations splicing rule r11(rk1) spliced, formed
One bit group collaborates FC1(FCk).Serioparallel exchange is namely used by all second bit group flow filament FZK, i2In each ratio
Special constituent element is spliced into n bit group interflow FC successivelykIn each bit combination.Bit group collaborates FCkWith bit stream group AkIt is phase
Match one by one.
As in Fig. 4, bit group is collaborated into FC1Each constituent element according to predetermined constellation mapping rule r12(rk2) mapped
For a coded modulation symbol, so as to obtain and bit stream group A1The emitting side symbol stream BS matched1.Wherein, predetermined constellation reflects
Penetrate regular r12In include the information such as code check, constellation mapping exponent number.
Emitting side coded modulation information MS in Fig. 2kThe predictive encoding rule m at least in Fig. 4K, i1, predetermined bit interweave rule
Then mK, i2, scheduled time interlacing rule mK, i3, predetermined combinations splicing rule rk1And predetermined constellation mapping rule rk2To be formed,
Also include the number of the bit stream included in inputted bit stream group.
Rule r is spliced to predetermined combinations belowk1Illustrate.
Predetermined combinations splicing rule r in step S11-2k1Based on predictive encoding rule mK, i1With predetermined constellation mapping rule
Then rk2Under, also it is based on：Bit stream group AkIncluded in bit stream aK, iNumber；Each bit stream aK, iSpectrum efficiency；Respectively
Individual bit stream aK, iThreshold level under predetermined channel is determined.
By predetermined combinations splicing rule rk1Determine all second bit group flow filament FZK, i2In bit constituent element respectively than
Spy's combination stream FCkIn bit combination in shared number of bits and arrangement position.Wherein, the shared number of bits is just
As the predetermined number L that above-mentioned second bit stream is combined to mergingK, i.For synthesis, for the combination of the second bit stream
Merging mode is constrained to by predetermined combinations splicing rule rk1Determine above-mentioned shared number of bits.
Specifically, predetermined combinations splicing rule determines above-mentioned predetermined number L by following stepsK, iAnd arrangement position.
By predetermined constellation mapping rule rk2Determine bit combination FCkIn whole number of bits；
In same bit stream group AkMiddle different bit stream aK, iPredetermined channel threshold level under, bit is calculated respectively
Average Mutual value between the bit of each in combination, to draw Average Mutual corresponding relation；
The Average Mutual corresponding relation is compareed, spectrum efficiency and default code check with reference to needed for each bit stream, according to
Predetermined computation multilevel iudge rule determines above-mentioned predetermined number LK, iAnd arrangement position.
Specifically, bit stream aK, iPredetermined channel include Gaussian white noise channel and Ruili fading channel.The present embodiment is adopted
Use Gaussian white noise channel.
Predetermined computation multilevel iudge rule comprises the following steps：
By Average Mutual corresponding relation, select several bits in advance in bit combination and carry out matching transmission each bit
Stream, the Average Mutual value that several bits correspond to the bit stream specified is calculated to obtain mutual information and value；
The actual capacity of bit stream is calculated with default code check by the amount of bits of several bits；And
Whether the actual capacity for comparing the bit stream is not more than mutual information and value, to judge several bits selected in advance
Predetermined number L and arrangement position whether meet the transmission process demand of each bit stream.When actual capacity be no more than it is pre-
When the mutual information calculated and the value of devising a stratagem, then transmission process demand is met, so that the quantity of these several bits and respective institute
Bit constituent element number of bits shared in bit combination and row in the arrangement position at place, that is, specified bit stream
Column position；It is on the contrary then be unsatisfactory for, need to select several bits in advance again and calculated, compared and judged whether to meet.
The embodiments of the invention provide a kind of information processing method.Fig. 5 is a kind of use in embodiment of the invention
In the schematic flow sheet of the information processing method of receiving terminal.
With reference to Fig. 5, the information processing method for receiving terminal comprises the following steps：
Step S21：Baseband symbol stream is received, the baseband symbol stream is to be used for the information processing of transmitting terminal in above-mentioned Fig. 1
Method is obtained；
Step S22：Recover corresponding with the emitting side symbol stream shown in Fig. 2, emitting side coded modulation information and pass through
The receiving side symbol stream and receiving side coded modulation information of channel；And
Step S23：Side symbol stream is received according to receiving side coded modulation information butt joint to be demodulated according to demodulation coding method
Decoding, obtains at least one bit stream.
Fig. 6 is the block diagram of the information process of receiving terminal in embodiment of the invention.By Fig. 6 to above-mentioned figure
Information processing method in 5 for receiving terminal is specifically described.
After the processing of baseband symbol stream FB sync equalizings, on the one hand, recover its of parsing with reference to parsing signalling module
He is signaling Sk, extracted by extracting receiving side symbol flow module, extract the emitting side symbol stream BS obtained with transmitting terminalk
Receiving side symbol stream BR that is corresponding and have passed through channelk.Without loss of generality, accorded with emitting side in Fig. 2 in the present embodiment pair
Number stream BS1The receiving side symbol stream BR of corresponding recovery1Explanation is described.On the other hand, solution is recovered by parsing signalling module
Separate out and emitting side coded modulation information MS1Receiving side coded modulation information MR corresponding and by channel1。
According to receiving side coded modulation information MR1, demodulation coding module is to receiving side symbol stream BR1Corresponding demodulation coding
Go out bit stream group A1Middle bit stream a1, i.Receiving terminal demodulation coding method is corresponding with transmitting terminal modulation coding method.
The embodiment of the present invention additionally provides a kind of demodulation coding method.Fig. 7 is one kind in embodiment of the invention
The schematic flow sheet of demodulation coding method.Above-mentioned demodulation coding method is specifically described with reference to Fig. 7.Due to matching somebody with somebody for receiving terminal
Put and relatively fix under normal circumstances, then without loss of generality, with bit stream group A in the present embodiment pairkIn need demodulation coding to go out ratio
Spy's stream a1,1Explanation is described.
Fig. 7 demodulation coding method is demodulation coding method involved in above-mentioned steps S23.The demodulation coding method bag
Containing following steps：
Step S23-1：Demapping is carried out to receiving side symbol stream based on predetermined constellation demapping rule；
Step S23-2：The log-likelihood ratio for extracting and matching with bit stream is split, log-likelihood ratio constituent element stream is formed；
Step S23-3：Rule is deinterleaved based on the scheduled time to be deinterleaved；
Step S23-4：Rule is deinterleaved based on predetermined bit to be deinterleaved；And
Step S23-5：Decoding is demodulated based on predetermined decoding rule, corresponding bit stream a is obtained1,1。
Specifically, it is to split to extract according to predetermined fractionation extracting rule to match with bit stream in above-mentioned steps S23-2
Log-likelihood ratio, the predetermined extracting rule that splits splices regular corresponding with such as Fig. 4 predetermined combinations, according to predetermined number L
With arrangement position split and extract to form log-likelihood ratio constituent element stream.
Fig. 8 is the block diagram of demodulation coding process in embodiment of the invention.The demodulation in Fig. 7 is translated by Fig. 8
Code method is specifically described.
Each the receiving side symbol modulated received by decoding module is relative with an emitting side symbol stream of transmitting terminal
Should, that is, the receiving side symbol stream BR in receiving terminal1Receiving side symbol and its order be emitting side symbol stream with transmitting terminal
BS1Emitting side symbol and its order it is corresponding, be that have passed through the symbol obtained after channel and the symbol is passed through
The estimation of channel.
De-mapping module is according to the predetermined constellation demapping rule corresponding with transmitting terminal, to receiving side symbol stream BR1In
Each symbol to carry out demapping be LLR combination, so as to obtain log-likelihood ratio combination stream LLRZ11(LLRZk1).Often
Individual LLR combinations include several LLR.Log-likelihood ratio combination stream LLRZ11Collaborate FC with bit group1It is corresponding, Yi Jijie
Log-likelihood ratio combination stream LLRZ in receiving endk1The 1st LLR combination in all LLR tables show bit of the receiving terminal to transmitting terminal
Combination stream FC1L-th of bit constituent element in all bits be 0 be still 1 estimation.
According to the predetermined fractionation extracting rule corresponding with transmitting terminal, from log-likelihood ratio combination stream LLRZ11Middle fractionation is carried
Take out and bit stream a1,1The log-likelihood ratio LLR matched, and these LLR are combined into a LLR constituent element, so as to form
One log-likelihood ratio constituent element stream LLRZ1,11(LLRZK, i1).First log-likelihood ratio constituent element stream LLRZ of receiving terminal1,11With transmitting terminal
The second bit group flow filament FZ1,12It is corresponding.
Rule is deinterleaved according to the scheduled time corresponding with transmitting terminal, to the first log-likelihood ratio constituent element stream LLRZ1,11
It is deinterleaved, so as to obtain the second log-likelihood ratio constituent element stream LLRZ1,12(LLRZK, i2).Second log-likelihood ratio constituent element stream
LLRZ1,12With the first bit group flow filament FZ1,11Corresponding.
Rule is deinterleaved according to the predetermined bit corresponding with transmitting terminal, by the second log-likelihood ratio constituent element stream LLRZ1,12
It is deinterleaved, so as to obtain and the second bit stream F1,12The first corresponding log-likelihood ratio stream LLR1,11(LLRK, i1)。
It is regular by the first log-likelihood ratio stream LLR according to the predetermined decoding corresponding with transmitting terminal1,11Progress is decoded as one
Individual bitstream block, so as to recover to obtain bit stream a1,1。
In addition, the receiving terminal of the present invention also can be to multiple bit stream aK, iDemodulation coding, example simultaneously are carried out based on same principle
Such as shown in Figure 8 from log-likelihood ratio combination stream LLRZk1Middle fractionation is extracted and multiple bit stream aK, iMatch respectively
Log-likelihood ratio, forms corresponding first log-likelihood ratio constituent element stream LLRZ respectivelyK, i1, the explanation of same principle is omitted herein.
The code modulating method of demodulation coding method in above-mentioned Fig. 7 and transmitting terminal in Fig. 2 is the inverse process of contrast,
In such demodulation coding method, receiving terminal first carries out demapping, then LLR related in LLR constituent element streams is extracted, finally
Carry out time de-interweaving (input and output are LLR constituent elements stream).
In addition, present invention also offers another demodulation coding method.Demodulated in the variation for being as shown in Figure 9 the present invention
The block diagram of decoding process.The present invention is also comprising such situation, and can also first carrying out time de-interweaving, (input and output are coding
Stream of modulation symbols), then demapping is carried out, finally LLR related in LLR constituent element streams is extracted.It is known that in Fig. 7 and Fig. 9
Middle both approaches are functionally equivalent, be only Fig. 9 variation in demodulation coding method take into account coded modulation
Symbol is often smaller than memory shared by LLR constituent element, is more easy to be used by actual industrial circle.
An example is set forth below and further describes technical scheme.
<Embodiment 1>
Communication system in this example is supported in same message bit stream group A1Contain up to two bit stream aK, i, respectively
For a1,1；a1,2, that is, the quantity y of bit stream is 1 or 2.
By a1,1, a1,2After the above-mentioned coding of transmitting terminal, Bit Interleave and combination merge and are time-interleaved, institute
The second obtained bit group flow filament FZ1,12、FZ1,22In each bit constituent element carry out serioparallel exchange formation bit group interflow FC1In
Each bit combination.
Table 1 describe the present invention be directed to same bit stream group A1Middle bit stream aK, iSeveral typical coded modulation moulds
The preferred parameter of formula.Same bit stream group A is represented with alphabetical y1Middle bit stream aK, iNumber.
In following tables 1, splice rule r corresponding to predetermined combinations11Information be vector, the vectorial length (compares
Whole number of bits of spy's combination) and predetermined constellation mapping rule r12In order of modulation be associated.For example, when vector
When length is 2, predetermined constellation mapping rule r12Order of modulation be 4 (QPSK)；When the length of vector is 4, predetermined constellation reflects
Penetrate regular r12Order of modulation be 16 (16-QAM)；When the length of vector is 6, predetermined constellation mapping rule r12Modulation order
Number is 64 (64-QAM)；By that analogy.
In bit combination, represented with the number of numerical value " 1 ", arrangement position in the bit combination in bit group interflow
Bit comes from FZ1,12, logarithm value " 2 " expression is from FZ1,22By that analogy.Such as pattern one, bit combination is [1 1222
22 2], that is, bit constituent element includes 8 bits, wherein first and second bit are from FZ1,12, remaining six bits
From FZ1,22。
By table 1, what is inputted when transmitting terminal is by pattern one, two or three is, bit stream group A1Include bit stream a1,1
And a1,2。
Table 1：Embodiment 1 is directed to bit stream aK, iThree kinds of typical coded modulation schemes preferred parameter
Emitting side coded modulation information MAP is coded modulation signaling field (16 bit) by signaling generation module, and should
Field is spliced together with other signaling fields, finally carries out coded modulation to signaling.How the present embodiment is to by coding mode
Information MAP is that 16 bits of encoded modulation signaling field is not illustrated.
In pattern for the moment, transmitting terminal is by a1,1It is divided into the message bit stream block that length one by one is 4320 bits, and each
Block is encoded into the first bitstream block that a length is 16200, so as to obtain the first bit stream F1,11；By a1,2It is divided into one by one
Length is the message bit stream block of 25920 bits, and is encoded into the first bitstream block that a length is 64800 each piece,
So as to obtain the first bit stream F1,21.The present embodiment is not described at this to the specific method of coding method.
In pattern two, transmitting terminal is by a1,1It is divided into the message bit stream block that length one by one is 21600 bits, and every
One piece is encoded into the first bitstream block that a length is 64800, so as to obtain the first bit stream F1,11；By a1,2It is divided into one
Individual length is the message bit stream block of 30240 bits, and is encoded into the first bit stream that a length is 64800 each piece
Block, so as to obtain the first bit stream F1,21.The present embodiment is not described at this to the specific method of coding method.
In pattern three, transmitting terminal is by a1,1It is divided into the message bit stream block that length one by one is 21600 bits, and every
One piece is encoded into the first bitstream block that a length is 64800, so as to obtain the first bit stream F1,11；By a1,2It is divided into one
Individual length is the message bit stream block of 34560 bits, and is encoded into the first bit stream that a length is 64800 each piece
Block, so as to obtain the first bit stream F1,21.The present embodiment is not described at this to the specific method of coding method.
In pattern for the moment, transmitting terminal is by the first bit stream F1,11In each first bitstream block Bit Interleave be same
The bit block of length, so as to obtain the second bit stream, then 2 bits, one group of (predetermined number LK, i) one bit constituent element of composition,
So as to obtain the first bit group flow filament FZ1,11；By the first bit stream F1,21In each first bitstream block Bit Interleave be same
The bit block of sample length, so as to obtain the second bit stream, then 6 bits, one group of (predetermined number LK, i) one bit group of composition
Member, so as to obtain the first bit group flow filament FZ1,21.The present embodiment is not described at this to the specific method of bit deinterleaving method.
In pattern two, transmitting terminal is by the first bit stream F1,11In each first bitstream block Bit Interleave be same
The bit block of length, so as to obtain the second bit stream, then 2 bits, one group of (predetermined number LK, i) one bit constituent element of composition,
So as to obtain the first bit group flow filament FZ1,11；By the first bit stream F1,21In each first bitstream block Bit Interleave be same
The bit block of sample length, so as to obtain the second bit stream, then 6 bits, one group of (predetermined number LK, i) one bit group of composition
Member, so as to obtain the first bit group flow filament FZ1,21.The present embodiment is not described at this to the specific method of bit deinterleaving method.
In pattern three, transmitting terminal is by the first bit stream F1,11In each first bitstream block Bit Interleave be same
The bit block of length, so as to obtain the second bit stream, then 3 bits, one group of (predetermined number LK, i) one bit constituent element of composition,
So as to obtain the first bit group flow filament FZ1,11；By the first bit stream F1,21In each first bitstream block Bit Interleave be same
The bit block of sample length, so as to obtain the second bit stream, then 5 bits, one group of (predetermined number LK, i) one bit group of composition
Member, so as to obtain the first bit group flow filament FZ1,21.The present embodiment is not described at this to the specific method of bit deinterleaving method.
In pattern one or pattern two or pattern three, according to scheduled time interlacing rule m1,13By the first bit group flow filament
FZ1,11Interweave for the second bit group flow filament FZ1,12；Scheduled time interlacing rule m1,23By the first bit group flow filament FZ1,21Interweave and be
Second bit group flow filament FZ1,22.The present embodiment is not described at this to the specific method of time-interleaved method.
In pattern one or two, splice rule r according to predetermined combinations11From the second bit group flow filament FZ1,12, the second bit group
Flow filament FZ1,22In respectively extract a bit constituent element, all 8 bits wherein included are spliced into a bit combination, from
And obtain bit group interflow FC1.Bit group collaborates FC1In l-th of bit combination in first and second bit come from second
Bit group flow filament FZ1,12In 2 bits being included of l-th of bit constituent element, bit group interflow FC1In l-th of bit combination
In the 3rd to 8 bits come from the second bit group flow filament FZ1,22In 6 bits being included of l-th of bit constituent element.
In pattern three, splice rule r according to predetermined combinations11From the second bit group flow filament FZ1,12, the second bit group flow filament
FZ1,22In respectively extract a bit constituent element, all 8 bits wherein included are spliced into a bit constituent element, thus
Collaborate FC to bit group1.Bit group collaborates FC1In l-th of bit combination in first, second come from the 4th bit
Second bit group flow filament FZ1,12In 3 bits being included of l-th of bit constituent element, bit group interflow FC1In l-th of bit
In combination the 3rd, the 5th, the 6th, the 7th and 8 bits come from the second bit group flow filament FZ1,22In l-th
5 bits that bit constituent element is included.
Without loss of generality, below only by table 2 to the predetermined constellation mapping rule r in pattern one12It is described in detail.
In pattern for the moment, according to predetermined constellation mapping rule r12Bit group is collaborated into FC1In each bit constituent element (8 bit) mapping
For a coded modulation symbol, that is, a plural number, so as to obtain emitting side symbol stream BSk.Specific mapping method such as table 2 below
It is shown.For example, the bit group interflow FC in pattern one1Comprising 8 bits be 01011000 when, be equal to due to 01011000
The 88 of 10 systems, coded modulation symbol is the plural number of serial number 88, i.e. -0.8258-0.0840i.
In pattern two or three, according to predetermined constellation mapping rule r12Bit group is collaborated into FC1In each bit group
First (8 bit) is mapped as a coded modulation symbol, that is, a plural number.The present embodiment is to predetermined star in above-mentioned pattern two, three
Seat mapping ruler r12Based on the same principle, the repetitive description thereof will be omitted herein.
Transmitting terminal is last by signaling symbols stream FS and emitting side symbol stream BSkCarry out framing and generate baseband signalling.
The hybrid coding for mixing demodulation coding method, information processing method and transmitting terminal of receiving terminal in the present embodiment is adjusted
Method processed, information processing method are corresponding, without loss of generality, demodulation coding module is only described here and is recovered for the moment in pattern
Bit stream a1,1Process.
Table 2：The bit group of embodiment 1 interflow is mapped as the mapping relations between emitting side symbol stream
De-mapping module is according to predetermined constellation demapping rule, by receiving side symbol stream BR1In each symbolic solution reflect
Penetrate and combined for the first LLR, so as to obtain log-likelihood ratio combination stream LLRZ11, each first LLR, which is combined, includes 8 LLR.
With contrary in table 1, split according to predetermined fractionation extracting rule from each first LLR combinations and extract first 2
LLR is (for recovering bit stream a1,1), and these LLR are combined into a LLR constituent element, so as to be formed and the second bit group
Flow filament FZ1,12The first corresponding log-likelihood ratio constituent element stream LLRZ1,11.That is, the LLRZ1,11L-th of LLR constituent element in wrapped
2 LLR contained just correspond to the FZ of transmitting terminal1,122 bits being included of l-th of bit constituent element.
Rule is deinterleaved to the first log-likelihood ratio constituent element stream LLRZ according to the scheduled time1,11Time de-interweaving is carried out, from
And obtain the first bit group flow filament FZ with transmitting terminal1,11The second corresponding log-likelihood ratio constituent element stream LLRZ1,12, that is, should
LLRZ1,12L-th of LLR constituent element included in LLR correspondence transmitting terminal in FZ1,11The institute that is included of l-th of bit constituent element
There is bit.
Rule is deinterleaved by the second log-likelihood ratio constituent element stream LLRZ according to predetermined bit1,12Deinterleave for in transmitting terminal
The first bit stream F1,11Corresponding first log-likelihood ratio stream LLR1,11, that is, LLR1,11In l-th of LLR block in each
F in LLR correspondence transmitting terminals1,11In l-th of bitstream block each bit.
It is regular by the first log-likelihood ratio stream LLR according to predetermined decoding1,11In each LLR stream block decoding be information ratio
Spy's stream block, so as to recover to obtain the bit stream a corresponding with the message bit stream of transmitting terminal1,1。
Below by way of table 1, table 3 to table 5 is combined, rule is spliced to the predetermined combinations in the present embodiment 1, and in predetermined combinations
Number of bits and arrangement position shared by how determining each bit constituent element respectively in bit combination in splicing rule are entered
Row is described in further detail.
Table 3：The bit group of embodiment 1 collaborates FC1Predetermined combinations splicing rule
For example, the communication system in setting the present embodiment is by the equivalent bandwidth of pattern one to data during pattern three
5MHz, when needing transmitting two paths program, the first via is the SD program for indoor reception, it is necessary to relatively low threshold level, such as
1dB, but less payload data rate, such as 2 mbits are only needed, and the second road program is the high definition for fixed outdoor reception
Program, it is therefore desirable to higher payload data rate, such as 10 mbits.Pattern one can be so used, because pattern one
The payload data rate that first via program can at most be supported is 0.53 × 5=2.65 mbits, and threshold level is 0.5dB,
Less than 1dB, and the payload data rate that the second road program can at most be supported is 2.40 × 5=12 mbits, and threshold level is
13.5dB, can also meet requirement.
In the communication system of the broadcast communication standard of the present invention, it is necessary to LDPC is encoded, Bit Interleave and constellation mapping
Individually designed and combined debugging is required for, so as to obtain best channel performance.
To consider capacity and thresholding in global design error correcting code, constellation mapping and the bit splicing of the present embodiment
It is required that.The existing various methods of the design of error correcting code and constellation mapping mode.When designing bit splicing with selection code check, mainly examine
Consider the different mutual information of each bit in set planisphere, be designed with reference to program capacity requirement.
Exemplified by, by the 256-QAM planispheres of predetermined constellation mapping rule, determine whole number of bits in bit combination
For 8, understand 8 bits of 256-QAM planispheres used in bit stream a by theoretical calculation1,1；Bit stream a1,2White Gaussian
Under the threshold level 0.5dB and 13.5dB of the channel condition made an uproar, the Average Mutual value between 8 bits is calculated respectively,
Shown in table 4 below, table 4 describes corresponding relation of the pattern for the moment between 8 bits, bit stream and the Average Mutuals
Table.
Table 4：Pattern Average Mutual corresponding relation for the moment in embodiment 1
| SNR(dB) | Bit 1 | Bit 2 | Bit 3 | Bit 4 | Bit 5 | Bit 6 | Bit 7 | Bit 8 |
| 0.5 | 0.3205 | 0.3272 | 0.0939 | 0.0991 | 0.0155 | 0.0172 | 0.0036 | 0.0035 |
| 13.5 | 0.8125 | 0.8155 | 0.6927 | 0.6945 | 0.4357 | 0.4454 | 0.1790 | 0.1621 |
The table 4 is compareed, spectrum efficiency and default code check with reference to needed for each bit stream, according to predetermined computation multilevel iudge
Rule is determined should select to splice and combine as a bit combination in 8 bits for which bit, so as to confirm
Above-mentioned predetermined number L and arrangement position.
Wherein, predetermined computation multilevel iudge rule is exactly specifically：
The bit 1 and bit 2 in several bits, such as table 4 are selected in advance in bit combination, by the bit 1 and bit 2
Corresponding to bit stream a1,1Average Mutual value 0.3205,0.3272 carry out addition calculation to obtain mutual information and value 0.6477；
Predetermined bit 3 to bit 8 is corresponded into bit stream a1,2Average Mutual value addition calculation to obtain mutual information and value
2.6094。
The actual capacity of bit stream is calculated with default code check by the amount of bits of several bits, by comparing this
Whether the actual capacity of bit stream is not more than mutual information and value, come judge the predetermined number L of several bits that selects in advance and
Whether arrangement position meets bit stream a1,1With bit stream a1,2Transmission process demand.
For table 4, program by code check as be preset as 4/15, then the actual capacity of program one is exactly 2 × 4/15
=0.53, it is slightly less than the mutual information and value of bit 1 and bit 2, can thus meets bit stream a1, the biography of 1 (both programs one)
Defeated processing requirement, program by code check as be preset as 5/15, then the actual capacity of program one is that 2 × 5/15=0.67 is slightly larger than
0.6477, then bit stream a1,1 (both program once) necessarily can not correctly be transmitted in the case where signal to noise ratio is 0.5dB.Change again
Yan Zhi, if program one selects bit 7 and 8, then mutual information 0.5dB at of bit 1 and bit 2 and be 0.0071, even if
It can not be used using 1/15 code check.
In table 4, this remaining mutual information of 6 bits at 13.5dB of bit 3 to bit 8 and value are 2.6094, program two
If code check is preset as into 6/15, the actual capacity of program two is exactly 6 × 6/15=2.4, be slightly less than 6 bits mutual information and
Value, can thus meet bit stream a1, the transmission process requirement of 2 (both programs two), if code check is preset as into 7/15, then section
The actual capacity of mesh two is 6 × 7/15=2.6, no better than 2.6094, because theoretical pole can not possibly be fully achieved in real system
Also very likely there is mistake in the case where signal to noise ratio is 13.5dB in limit, program two.
Accordingly, it is determined that going out in pattern once, bit group interflow FC1In bit combination in first and second bit come
From the second bit group flow filament FZ1,12In 2 bits being included of bit constituent element, bit group interflow FC1In the 3rd to the 8th
Bit comes from the second bit group flow filament FZ1,22In 6 bits being included of bit constituent element.
Again by table 5 in mode three exemplified by, learn letter of 8 bits in Gauss white noise of 256-QAM planispheres used
Average Mutual under the conditions of road when signal to noise ratio is 4.1dB and 17.1dB is shown in table 5.
Table 5：Average Mutual corresponding relation in embodiment 1 during pattern three
| SNR(dB) | Bit 1 | Bit 2 | Bit 3 | Bit 4 | Bit 5 | Bit 6 | Bit 7 | Bit 8 |
| 4.1 | 0.4862 | 0.4935 | 0.2267 | 0.2346 | 0.0428 | 0.0469 | 0.0110 | 0.0104 |
| 17.1 | 0.8845 | 0.8852 | 0.8128 | 0.8140 | 0.6488 | 0.6540 | 0.4061 | 0.3770 |
So mutual information at 4.1dB of the pre- bit 1,2 and 4 selected and be 1.2142, at this moment code check is preset
For 5/15, then the actual capacity of program one is exactly 3 × 5/15=1, it is slightly less than 1.2142, and remaining 5 bit is in 17.1dB
The mutual information at place and for 2.8987, if at this moment selecting 8/15 code check, the actual capacity of program two is 5 × 8/15=2.67, is also compared
It is more reasonable.
Below by way of for example, by technical scheme from existing by different program distributions to different time-frequencies
Such technical scheme compares in resource, illustrates the spectrum utilization for transmitting two paths program in 5MHz system in equivalent bandwidth
Rate.
(1) prior art is utilized
Two programs respectively account for 50% running time-frequency resource.
The code check of first via program is 4/15, and modulation system is irregular 16-QAM, therefore, and payload data rate is 5 × 4/
Threshold level under 15 × log2 (16) × 0.5=2.67 mbits, Gauss white noise channel is 1.5dB；
The code check of second road program is 8/15, and modulation system is irregular 256-QAM, therefore, and payload data rate is 5 × 8/
Threshold level under 15 × log2 (256) × 0.5=10.67 mbits, Gauss white noise channel is 13.9dB.
(2) the technology of the present invention is utilized
Coded modulation symbol on all running time-frequency resources is the information of irregular 256-QAM modulation, wherein dibit
Information from first via program and remaining six bit comes from the second road program.
The code check of first via program is 4/15, therefore, and the payload data rate of first via program is 5 × 4/15 × 2=2.67
Threshold level under mbit, Gauss white noise channel is 0.5dB；
And the code check of the second road program is 6/15, therefore, the payload data rate of the second road program is 5 × 6/15 × 6=12
Threshold level under mbit, Gauss white noise channel is 13.5dB.
Compare and understand, employ technology provided by the present invention, the payload data rate of first via program is constant keeping
In the case of, threshold level is effectively reduced into 1dB, so that coverage rate is substantially increased, and the second road program is not only reduced
Threshold level, also improves about 12.5% payload data rate, so as to effectively increase the availability of frequency spectrum.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this area
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and techniques content of the disclosure above to this hair
Bright technical scheme makes possible variation and modification, therefore, every content without departing from technical solution of the present invention, according to the present invention
Any simple modifications, equivalents, and modifications made to above example of technical spirit, belong to technical solution of the present invention
Protection domain.
Claims (7)
1. a kind of code modulating method, coded modulation is carried out to bit stream, it is characterised in that including：
At least two bit streams in bit stream group are encoded with predictive encoding rule respectively, entered with predetermined bit interlacing rule
Row Bit Interleave, is merged with predetermined number L bits, and time-interleaved with the progress of scheduled time interlacing rule, is respectively obtained
Bit group flow filament；
Each bit constituent element in all bit group flow filaments is spliced respectively successively, so as to be sequentially formed as in bit group interflow
Each bit combination；And
The bit combination stream is mapped according to predetermined constellation mapping rule, emitting side symbol stream is obtained.
2. code modulating method as claimed in claim 1, it is characterised in that：
Wherein, bit constituent element each described is spliced respectively in accordance with predetermined combinations splicing rule successively,
The predetermined combinations splicing rule is based on the regular and described predetermined constellation mapping rule of the predictive encoding, Yi Jiji
In：
The number of bit stream included in the bit stream group；The spectrum efficiency of each bit stream；And each bit stream exists
Threshold level under predetermined channel determines,
Work shared by determining each described bit constituent element respectively in the bit combination by predetermined combinations splicing rule
For the number of bits and arrangement position of the predetermined number L.
3. code modulating method as claimed in claim 2, it is characterised in that：
Wherein, the predetermined combinations splicing rule is included：
Whole number of bits in the bit combination are determined by the predetermined constellation mapping rule；
In same bit stream group under the threshold level of different bit streams, each in the bit combination is calculated respectively and is compared
Average Mutual value between spy, to draw Average Mutual corresponding relation；And
The Average Mutual corresponding relation is compareed, spectrum efficiency and default code check with reference to needed for each bit stream, according to pre-
Devise a stratagem calculates multilevel iudge rule and determines the predetermined number L and the arrangement position.
4. code modulating method as claimed in claim 3, it is characterised in that：
Wherein, the predetermined computation multilevel iudge rule is included：
By the Average Mutual corresponding relation, select several bits in advance in the bit combination to distinguish matching transmission
Each bit stream；
The Average Mutual value that several described bits correspond to the bit stream specified is calculated, to obtain mutual information
And value；
By the amount of bits and the default code check of each bit stream of several bits, each ratio is calculated
The actual capacity of spy's stream；And
Whether the mutual information and value are not more than by the actual capacity for comparing each bit stream, to judge what is selected in advance
Whether the predetermined number L of several bits and the arrangement position meet the transmission process demand of each bit stream.
5. a kind of information processing method, the bit stream group to transmitting terminal is handled, it is characterised in that including：
By at least one bit stream group according to code modulating method as claimed in claim 1 carry out coded modulation for it is corresponding extremely
A few emitting side symbol stream, also, respectively by least one emitting side coded modulation information and other signaling carry out groups
Merge coded modulation and obtain signaling symbols stream；And
All emitting side symbol streams and the signaling symbols stream are subjected to framing and baseband symbol stream is generated,
Wherein, the emitting side coded modulation packet is containing predictive encoding as described in the appended claim 1 is regular, the predetermined bit
Interlacing rule and the scheduled time interlacing rule.
6. a kind of information processing method, the bit stream group to receiving terminal is handled, it is characterised in that including：
Baseband symbol stream is received, the baseband symbol stream is obtained by information processing method as claimed in claim 5；
Recover it is corresponding with the emitting side symbol stream, the emitting side coded modulation information, and by channel receiving side
Symbol stream and receiving side coded modulation information；And
According to the receiving side coded modulation information, the receiving side symbol stream is demodulated according to demodulation coding method and translated
Code, obtains at least one described bit stream,
Wherein, the demodulation coding method comprises the following steps：
Rule is deinterleaved based on the scheduled time to be deinterleaved the receiving side symbol stream；
Demapping is carried out based on predetermined base demapping rule；
The log-likelihood ratio for extracting and matching with the bit stream is split, log-likelihood ratio constituent element stream is formed；And
It is deinterleaved based on predetermined bit deinterleaving rule, enters row decoding based on predetermined decoding rule, recovery obtains at least one
The individual bit stream.
7. information processing method as claimed in claim 6, it is characterised in that：
Wherein, the log-likelihood ratio is extracted according to the predetermined extracting rule that splits,
The predetermined fractionation extracting rule is corresponding with predetermined combinations splicing rule, according to the predetermined number L and arrangement position
Split and extract to form the log-likelihood ratio constituent element stream.
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| CN107682113B (en) * | 2017-08-29 | 2020-08-14 | 西安空间无线电技术研究所 | Method for coding and decoding cascade LDPC code in ATM switching network |
| CN108134654A (en) * | 2017-12-25 | 2018-06-08 | 四川九洲空管科技有限责任公司 | A kind of method and device for improving ultra-long data report transmission reliability |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105450355A (en) | 2016-03-30 |
| CN107395320A (en) | 2017-11-24 |
| CN105450355B (en) | 2020-02-14 |
| CN107294657A (en) | 2017-10-24 |
| CN107465485A (en) | 2017-12-12 |
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