CN108200001A - The method and apparatus that signal multilayer is modulated in communication system - Google Patents
The method and apparatus that signal multilayer is modulated in communication system Download PDFInfo
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- CN108200001A CN108200001A CN201711411864.2A CN201711411864A CN108200001A CN 108200001 A CN108200001 A CN 108200001A CN 201711411864 A CN201711411864 A CN 201711411864A CN 108200001 A CN108200001 A CN 108200001A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/345—Modifications of the signal space to allow the transmission of additional information
- H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
- H04L27/3472—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel by switching between alternative constellations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/345—Modifications of the signal space to allow the transmission of additional information
- H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
- H04L27/3483—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel using a modulation of the constellation points
Abstract
The invention discloses the method and apparatus that signal multilayer in communication system is modulated, and first according to the transmission demand of communication system, transmission data are divided into information flow of the multichannel with transmission demand；Then it is the modulation system that signal is determined per road information flow according to the transmission demand of multiline message stream；Then planisphere is set to map for modulated signal all under each modulation system；Then it is mapped according to the data to be transferred of information flow and the planisphere of modulated signal, is to generate modulated signal per road information flow；Then according to the transmission demand and channel state information of multiline message stream, modulated signal and the planisphere mapping of multiline message stream are merged, generate the multilayer modulated signal of communication system and planisphere mapping.The present invention for multiline message stream by determining that matched modulation system is mapped with planisphere, processing is merged to modulated signal further according to the transmission demand and channel status of multiline message stream, realizes transmitting end data from bit to the efficient modulation of multilayer modulated signal and mapping.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to the method and dress that signal multilayer is modulated in a kind of communication system
It puts.
Background technology
With the rapid development of mobile communication technology, be capable of carrying signal sky, when, the resources such as frequency, antenna it is abundant
It excavates and utilizes.Either wired or cordless communication network is all in tight demand of the excess load carrying mankind to information exchange.
How the traffic demands that are persistently skyrocketed through are solved, it has also become current global communication practitioner and the intractable of mechanism are asked
Topic.
In order to solve this Tough questions, scientific research personnel starts to explore with excavating power domain, degenerate channel gain with mechanism
Deng the frequency spectrum resource not being fully utilized also, for improving the transmittability of existing communication network.And propose non-orthogonal multiple
The technologies such as access, work(point multiplexing and orthogonal work(point multiplexing multiple access access.It is multiple that these technologies need transmitting terminal that data are mapped to
Then modulated signal is directly superimposed multiple modulated signals and is sent；In receiving terminal, counteracting serial interference skill is utilized
Art successively demodulates the multilayer signal being superimposed.Existing planisphere mapping is directly superimposed multiple modulated signals
Method does not set up the mapping relations of bit data and multiple-layer stacked signal well, and the demodulation of receiving terminal is made to be faced with seriously
Error accumulation problem, demodulation performance is poor.Therefore, the transmission performance of this kind of system is seriously constrained.
Invention content
It is above-mentioned existing to overcome the purpose of the present invention is to provide the method and apparatus that signal multilayer in communication system is modulated
Technology there are the defects of, the present invention and is by the way that the transmission data of transmitting terminal are divided into information flow of the multichannel with transmission demand
Determine that matched modulation system is mapped with planisphere per road information flow, further according to the transmission demand and channel status of multiline message stream
Processing is merged to modulated signal, efficient mapping of the transmitting end data from bit to multilayer modulated signal is realized, solves existing
The problem of leading to not counteracting serial interference is effectively used to demodulate because of data and multilayer modulated signal mapping mismatch in communication system,
Break through the bottleneck that modulating performance is low in existing communication system.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
The method that signal multilayer is modulated in communication system, includes the following steps：
Step 1：According to the transmission demand of communication system, transmission data are divided into information flow of the multichannel with transmission demand；
Step 2：It is the modulation system that signal is determined per road information flow according to the transmission demand of multiline message stream；
Step 3：Planisphere is set to map for modulated signal all under each modulation system；
Step 4：It is mapped according to the data to be transferred of information flow and the planisphere of modulated signal, is per the generation modulation of road information flow
Signal；
Step 5：According to the transmission demand and channel state information of multiline message stream, the modulated signal of multiline message stream and
Planisphere mapping merges, and generates the multilayer modulated signal of communication system and planisphere mapping；
Wherein, the transmission demand of information flow includes：The QoS requirement of a plurality of business or a plurality of use
The QoS requirement at family.
Further, step 2 Zhong Weimei roads information flow determines that the specific method of the modulation system of signal is：Believed according to every road
The transmission demand of stream is ceased, selects the system of digit key control signal and keying mode；
Wherein, system includes：Binary system, the quaternary, quinary, octal system, novenary, hexadecimal and ten septenary；
Keying mode includes：Amplitude-shift keying is modulated, shift keying modulation, phase shift keying modulation, quadrature amplitude modulation and orthogonal frequency division multiplexing
With modulation.
Further, the specific method of setting planisphere mapping is in step 3：
For each modulated signal on the planisphere corresponding to modulation system, one bit symbol is set；Wherein, same tune
The code length of all symbols is all equal under mode processed, and code word is all different, and the number of all symbols is equal to tune under same modulation system
System number in mode processed；Bit symbol is sequence of binary digits；
Different bit symbols is distributed for all modulated signals under each modulation system；And the bit symbol after distributing needs
Meet condition：Under same modulation system, code distance and two modulated signals of any two modulated signal institute distributing bit symbol
The space length of constellation point is directly proportional on planisphere.
Further, the modulated signal of multiline message stream is merged in step 5, generates the multilayer modulation of communication system
Signal and the specific method of planisphere mapping are：
According to the transmission demand of multiline message stream, to the constellation point in modulated signal and planisphere from different information flows
It is adjusted into line amplitude；According to the transmission demand of multiline message stream, in modulated signal and planisphere from different information flows
Constellation point is into horizontal phasing control；Multiple modulated signals after amplitude and phase adjustment are overlapped, generate the multilayer tune of system
Signal processed；Multiple planispheres after amplitude and phase adjustment are merged, generate the planisphere mapping of system；
Wherein, each constellation point after merging on system constellation figure is folded by one group of constellation point from each information flow
Add, and all represent a different multilayer modulated signal；Multiple bit symbols of every group of constellation point are combined into system constellation
The bit symbol of constellation point on figure generates the planisphere mapping of system.
Further, the method for the phase adjustment is specially：Modulated signal and planisphere from same information flow
The phase that upper constellation point is adjusted is identical；After phase adjusted, the code distance of two constellation points of arbitrary neighborhood on system constellation figure
It is minimum.
The device that signal multilayer is modulated in communication system, including data distribution module, is connected with tune in data distribution module
Matching module processed is modulated and is connected with planisphere mapping block on matching module, and signal generation is connected on planisphere mapping block
Module is connected with multilayer aliasing module on signal generation module；Wherein：
Data distribution module：According to the transmission demand of communication system, transmission data, which are divided into multichannel, has transmission demand
Information flow；
Modulate matching module：It is the modulation system that signal is determined per road information flow according to the transmission demand of multiline message stream；
Planisphere mapping block：Planisphere is set to map for modulated signal all under each modulation system；
Signal generation module：It is mapped according to the data to be transferred of information flow and the planisphere of modulated signal, is per road information flow
Generate modulated signal；
Multilayer aliasing module：According to the transmission demand and channel state information of multiline message stream, the tune of multiline message stream
Signal and planisphere mapping processed merges, and generates the multilayer modulated signal of communication system and planisphere mapping.
Further, modulation matching module Zhong Weimei roads information flow determines that the modulation system of signal is specially：According to every road
The transmission demand of information flow selects the system of digit key control signal and keying mode；
Wherein, system includes：Binary system, the quaternary, quinary, octal system, novenary, hexadecimal and ten septenary；
Keying mode includes：Amplitude-shift keying is modulated, shift keying modulation, phase shift keying modulation, quadrature amplitude modulation and orthogonal frequency division multiplexing
With modulation.
Further, the mapping of setting planisphere is specially in planisphere mapping block：
For each modulated signal on the planisphere corresponding to modulation system, one bit symbol is set；Wherein, same tune
The code length of all symbols is all equal under mode processed, and code word is all different, and the number of all symbols is equal to tune under same modulation system
System number in mode processed；Bit symbol is sequence of binary digits；
Different bit symbols is distributed for all modulated signals under each modulation system；And the bit symbol after distributing needs
Meet condition：Under same modulation system, code distance and the modulated signal of any two modulated signal institute distributing bit symbol
The space length of constellation point is directly proportional on planisphere.
Further, the modulated signal of multiline message stream is merged in multilayer aliasing module, generates communication system
Multilayer modulated signal and planisphere mapping are specially：
According to the transmission demand of multiline message stream, to the constellation point in modulated signal and planisphere from different information flows
It is adjusted into line amplitude；According to the transmission demand of multiline message stream, in modulated signal and planisphere from different information flows
Constellation point is into horizontal phasing control；Multiple modulated signals after amplitude and phase adjustment are overlapped, generate the multilayer tune of system
Signal processed；Multiple planispheres after amplitude and phase adjustment are merged, generate the planisphere mapping of system；
Wherein, each constellation point after merging on system constellation figure is folded by one group of constellation point from each information flow
Add, and all represent a different multilayer modulated signal；Multiple bit symbols of every group of constellation point are combined into system constellation
The bit symbol of constellation point on figure generates the planisphere mapping of system.
Further, multilayer aliasing mould phase adjustment in the block is specially：Modulated signal and star from same information flow
The phase that the upper constellation point of seat figure is adjusted is identical；After phase adjusted, two constellation points of arbitrary neighborhood on system constellation figure
Code distance is minimum.
Compared with prior art, the present invention has technique effect beneficial below：
The method of the present invention has the information flow of transmission demand by the way that transmission data are first divided into multichannel, and Zai Weimei roads information flow is true
Fixed matched modulation system is mapped with planisphere, and further modulation is believed according to the transmission demand of multiline message stream and channel status
Number and planisphere mapping carry out merging treatment mode, meet counteracting serial interference demodulation requirement under realize transmitting end data
From bit to the efficient mapping of multilayer modulated signal, the bottleneck that multilayer modulated signal performance is low in existing communication system is broken through.
The data of transmitting terminal are divided into the information flow that multichannel has transmission demand by apparatus of the present invention by data distribution module, are led to
Ovennodulation matching module sets matched modulation system for multiline message stream, is to match mould by modulation by planisphere mapping block
The modulation system of block setting determines suitable planisphere mapping, is determined by signal generation module according to planisphere mapping block
Planisphere map and information flow in data generate modulated signal, by multilayer aliasing module the multiplexing signal of generation and
Planisphere mapping carries out merging treatment, realizes efficiently producing and emit end data and multilayer modulated signal for multilayer modulated signal
It is low to break through existing communication system multilayer modulated signal demodulation performance when meeting counteracting serial interference demodulation and requiring for efficiently mapping
Bottleneck.
Description of the drawings
Fig. 1 is the flow chart of signal multilayer modulator approach in communication system of the invention；
Fig. 2 is the schematic diagram that the present invention merges planisphere mapping；
Fig. 3 is the structure chart of signal multilayer modulating device in communication system of the invention.
Specific embodiment
The embodiment of the present invention provides a kind of method that signal multilayer is modulated in communication system, passes through the transmission number transmitting terminal
The information flow for having transmission demand according to multichannel is divided into, Bing Weimei roads information flow determine that matched modulation system is mapped with planisphere,
Merging treatment is carried out to modulated signal and planisphere mapping with channel status further according to the transmission demand of multiline message stream, realizes hair
Efficient mapping of the end data from bit to multilayer modulated signal is penetrated, is solved in existing communication system because of data and multilayer modulated signal
The problem of mapping mismatch causes to demodulate difficulty, break through the bottleneck that modulating performance is low in existing communication system.In order to make the present invention's
Object, technical solution and advantage are more clearly understood, and with reference to embodiments, the present invention will be described in further detail.
Referring to Fig. 1, the flow chart of signal multilayer modulator approach, can wrap in the communication system proposed for the embodiment of the present invention
It includes：
Transmission data according to the transmission demand of communication system, are divided into information flow of the multichannel with transmission demand by S101；
Below by taking a single system as an example, to transmission data be divided into multichannel with transmission demand information flow method into
Row is described in detail.
Assuming that the transmission data of system are made of two business to be serviced, it is expressed as N1And N2；The two business have respectively
From QoS requirement, respectively C1And C2。
The embodiment of the present invention is formed according to the business of transmission data, and transmission data are divided into two-way information flow, are represented respectively
For X1And X2, and it is respectively C to set the transmission demands of the two information flows1And C2。
Similarly, in the case of more than two waits for service business, also there is the method for being divided into multiline message stream.
S102 is the modulation system that signal is determined per road information flow according to the transmission demand of multiline message stream；
Determine that the specific method of the modulation system of signal is for every road information flow：According to the transmission demand of every road information flow,
Select the system of digit key control signal and keying mode；
Wherein, system includes：Binary system, the quaternary, quinary, octal system, novenary, hexadecimal and ten septenary；
Keying mode includes：Amplitude-shift keying is modulated, shift keying modulation, phase shift keying modulation, quadrature amplitude modulation and orthogonal frequency division multiplexing
With modulation.
Below by taking a single system as an example, the determining of signal modulation mode is described in detail.
Assuming that the transmission data of system are made of two business to be serviced, it is expressed as N1And N2；The two business are distinguished
The transmission rate of 2 bits per seconds and 1 bits per second is needed to meet QoS requirement；According to the service quality need of transmission data
It asks, transmission data is divided into two-way information flow, are expressed as X1And X2, and the transmission demand of the two information flows is set to distinguish
To meet the transmission rate of 2 bits per seconds and 1 bits per second.
The embodiment of the present invention is according to the transmission demand of two information flows, the information flow for 2 bits per second transmission rates of needs
Quaternary shift keying modulation is selected, the information flow to need 1 bits per second transmission rate selects binary frequency shift keying modulation.
Similarly, in the case of more than two information flow, also there is the method for determining multiple modulation systems.
S103 is that modulated signals all under each modulation system set planisphere to map；
Setting planisphere map specific method be：It is set for each modulated signal on the planisphere corresponding to modulation system
Put a bit symbol；Wherein, the code length of all symbols is all equal under same modulation system, and code word is all different, and same modulation
The number of all symbols is equal to the system number in modulation system under mode；Bit symbol is sequence of binary digits；
Different bit symbols is distributed for all modulated signals under each modulation system；And the bit symbol after distributing needs
Meet condition：Under same modulation system, code distance and the modulated signal of any two modulated signal institute distributing bit symbol
The space length of constellation point is directly proportional on planisphere.
Below by taking the single system in S102 as an example, planisphere mapping settings is described in detail.
By taking two information flows in S102 and fixed two modulation systems as an example, the embodiment of the present invention is according to information flow
X1The quaternary shift keying modulation of use, setting code element number are 4, Baud Length 2, four code words be respectively " 00 ", " 01 ",
" 10 " and " 11 "；Referring to Fig. 2, according to point of the constellation point on planisphere of four modulated signals in quaternary shift keying modulation
Cloth is the constellation point distribution codeword " 00 " in first quartile, is the constellation point distribution codeword " 01 " in the second quadrant, is in third
The constellation point distribution codeword " 11 " of quadrant is the constellation point distribution codeword " 10 " in fourth quadrant；
The embodiment of the present invention is according to information flow X2The binary frequency shift keying modulation of use, setting code element number is 2, and symbol is long
It is 1 to spend, and two code words are respectively " 0 " and " 1 "；Referring to Fig. 2, two modulated signals are in star in being modulated according to binary frequency shift keying
The distribution of the upper constellation point of seat figure, to two constellation point difference distribution codewords " 0 " and " 1 ".
Similar, in the case of two-way information flow is more than, also promising multiple modulation systems set the side that planisphere maps
Method.
S104 is mapped according to the data to be transferred of information flow and the planisphere of modulated signal, is per the generation modulation of road information flow
Signal；
Below by taking a single system as an example, the method for generating modulated signal for every road information flow is described in detail.
Assuming that system has two-way information flow, it is expressed as X1And X2；Information flow X1Data to be transferred for " 100111 ",
Information flow X2Data to be transferred be " 11001 "；Referring to Fig. 2, information flow X1The quaternary shift keying modulation of use sets constellation
Figure is mapped as first quartile, the second quadrant, on third quadrant and fourth quadrant the bit symbol of constellation point be respectively " 00 ",
" 01 ", " 11 " and " 10 "；Information flow X2The binary frequency shift keying modulation of use, setting planisphere are mapped as on axis of abscissas
The bit symbol of two constellation points is " 0 " and " 1 " respectively.
The embodiment of the present invention is mapped according to the data to be transferred and planisphere of two information flows, is information flow X1Generation and the 4th
The matched modulated signal of quadrant constellation point；For information flow X2Generation and the matched modulated signal of constellation point in negative real reference axis.
It is similar, in the case of two-way information flow, the mapping of various constellations point and different data to be transferred is more than, also promising letter
The method of breath stream generation modulated signal.
S105, according to the transmission demand and channel state information of multiline message stream, the modulated signal of multiline message stream and
Planisphere mapping merges, and generates the multilayer modulated signal of communication system and planisphere mapping；
The specific method of multilayer modulated signal for generating communication system is：According to the transmission demand of multiline message stream, to coming
It is adjusted from the constellation point in the modulated signal and planisphere of different information flows into line amplitude；According to the transmission need of multiline message stream
It asks, to the constellation point in modulated signal and planisphere from different information flows into horizontal phasing control；To amplitude and phase adjustment
Multiple modulated signals afterwards are overlapped, and generate the multilayer modulated signal of system；To multiple constellations after amplitude and phase adjustment
Figure merges, and generates the planisphere mapping of system；
Wherein, each constellation point after merging on system constellation figure is folded by one group of constellation point from each information flow
Add, and all represent a different multilayer modulated signal；Multiple bit symbols of every group of constellation point are combined into system constellation
The bit symbol of constellation point on figure generates the planisphere mapping of system；Phase adjustment makes the modulated signal from same information flow
The phase identical with constellation point adjustment on planisphere；After phase adjusted, two constellation points of arbitrary neighborhood on system constellation figure
Code distance it is minimum；
Below by taking a single system as an example, the modulated signal by multiline message stream and planisphere mapping are merged
The method for generating the multilayer modulated signal of communication system is described in detail.
Assuming that system has two-way information flow, it is expressed as X1And X2；The transmission demand of the two information flows is respectively full
The transmission rate of 2 bits per seconds of foot and 1 bits per second；Information flow X1The quaternary shift keying modulation of use sets planisphere
Be mapped as first quartile, the second quadrant, on third quadrant and fourth quadrant the bit symbol of constellation point be respectively " 00 ", " 01 ",
" 11 " and " 10 "；Information flow X2The binary frequency shift keying modulation of use, setting planisphere are mapped as on positive and negative axis of abscissas
The bit symbol of two constellation points is " 0 " and " 1 " respectively；Data to be transferred is information flow X after planisphere maps1Generation and the
The matched modulated signal of four-quadrant constellation point is information flow X2Generation and the matched modulated signal of constellation point on negative horizontal axis；Letter
Road loss is 0.1, and noise power is n.
The embodiment of the present invention is according to transmission demand, channel loss information and noise power information, setting information stream X1And letter
Breath stream X2The transmission power of modulated signal is respectively 60n and 10n；From information flow X1With information flow X2Modulated signal amplitude
It is adjusted to respectivelyWithInformation flow X1With information flow X2In planisphere be respectively according to amplitudeWith
It is adjusted；From information flow X1With information flow X2Modulating signal phase adjust respectively 0 degree and+45 degree；Information flow X1With
Information flow X2The phase of constellation point is adjusted in planisphere；Referring to Fig. 2, to two constellations after amplitude adjustment and phase adjustment
Figure merges, and generates the planisphere mapping of system；Two modulated signals are overlapped, generate the multilayer modulation letter of system
Number, bit code is the constellation point of " 101 " in multilayer modulated signal constellation in corresponding diagram 2；Referring to Fig. 2, multilayer modulated signal star
Bit code " 101 " on seat figure is information flow X1In the code word " 10 " of fourth quadrant constellation point and information flow X2It broadcasts TV programs by satellite in negative horizontal axis
The direct combination of the code word " 1 " of seat point；
Wherein, the detailed process of phase adjustment is：As information flow X1Signal for bit symbol " 00 " it is corresponding modulation letter
Number, to information flow X2In signal rotation -45 spend；As information flow X1Signal for the corresponding modulated signal of bit symbol " 01 ", it is right
Information flow X2In signal rotation -135 spend；As information flow X1Signal for the corresponding modulated signal of bit symbol " 11 ", to information
Flow X2In 135 degree of signal rotation；As information flow X1Signal for the corresponding modulated signal of bit symbol " 10 ", to information flow X2
In signal rotation+45 spend.
Similar, in the case of two-way information flow, the mapping of various constellations point and different data to be transferred is more than, also there is generation
The method of multilayer modulated signal and the planisphere mapping of communication system.
The method that signal multilayer is modulated in above-mentioned communication system, has transmission demand by the way that transmission data are first divided into multichannel
Information flow, Zai Weimei roads information flow determines that matched modulation system is mapped with planisphere, according to the transmission demand of multiline message stream
The mode of merging treatment is carried out to modulated signal and planisphere mapping with channel status, realizes transmitting end data from bit to more
Layer modulated signal is efficiently produced and is mapped, and breaks through existing communication system multilayer tune when meeting counteracting serial interference demodulation and requiring
The low bottleneck of signal demodulation performance processed.
As shown in figure 3, in communication system of the embodiment of the present invention signal multilayer modulate device structure chart, including：
Data distribution module：According to the transmission demand of communication system, transmission data, which are divided into multichannel, has transmission demand
Information flow；
Modulate matching module：It is the modulation system that signal is determined per road information flow according to the transmission demand of multiline message stream；
Planisphere mapping block：Planisphere is set to map for modulated signal all under each modulation system；
Signal generation module：It is mapped according to the data to be transferred of information flow and the planisphere of modulated signal, is per road information flow
Generate modulated signal；
Multilayer aliasing module：According to the transmission demand and channel state information of multiline message stream, the tune of multiline message stream
Signal and planisphere mapping processed merges, and generates the multilayer modulated signal of communication system and planisphere mapping.
In embodiments of the present invention, the data of transmitting terminal are divided into the letter that multichannel has transmission demand by data distribution module 301
Breath stream, modulation matching module 302 set matched modulation system for multiline message stream, and planisphere mapping block 303 is modulation
Suitable planisphere mapping is determined with the modulation system that module 302 is set, and signal generation module 304 is according to planisphere mapping block
Data in determining planisphere mapping and information flow generate modulated signal, and multilayer aliasing module 305 is the multiplexing of generation
Signal and planisphere mapping carry out merging treatment, realize multilayer modulated signal efficiently produce and data to be transmitted and multilayer are modulated
The efficient mapping of signal breaks through the bottleneck that multilayer modulated signal performance is low in existing communication system.
Wherein, modulation matching module Zhong Weimei roads information flow determines that the modulation system of signal is specially：According to every road information
The transmission demand of stream selects the system of digit key control signal and keying mode；Wherein, system includes：Binary system, the quaternary, five
System, octal system, novenary, hexadecimal and ten septenary；Keying mode includes：Amplitude-shift keying is modulated, shift keying modulation,
Phase shift keying modulation, quadrature amplitude modulation and OFDM modulation.
Wherein, the mapping of setting planisphere is specially in planisphere mapping block：For on the planisphere corresponding to modulation system
Each modulated signal set a bit symbol；Wherein, the code length of all symbols is all equal under same modulation system, and code word is all
Difference, and the number of all symbols is equal to the system number in modulation system under same modulation system；Bit symbol is binary number
Word sequence；
Different bit symbols is distributed for all modulated signals under each modulation system；And the bit symbol after distributing needs
Meet condition：Under same modulation system, code distance and the modulated signal of any two modulated signal institute distributing bit symbol
The space length of constellation point is directly proportional on planisphere.
Wherein, the modulated signal of multiline message stream is merged in multilayer aliasing module, generates the multilayer of communication system
Modulated signal is specially：According to the transmission demand of multiline message stream, in modulated signal and planisphere from different information flows
Constellation point into line amplitude adjust；According to the transmission demand of multiline message stream, to modulated signal and star from different information flows
Constellation point on seat figure is into horizontal phasing control；Multiple modulated signals after amplitude and phase adjustment are overlapped, generate system
Multilayer modulated signal；Multiple planispheres after amplitude and phase adjustment are merged, generate the planisphere mapping of system；It closes
And each constellation point on rear system constellation figure is formed by stacking, and all represent by one group of constellation point from each information flow
One different multilayer modulated signal；Multiple bit symbols of every group of constellation point are combined into the bit of constellation point on system constellation figure
Symbol generates the planisphere mapping of system；Wherein, multilayer aliasing mould phase adjustment in the block can be the tune from same information flow
Constellation point adjusts identical phase on signal and planisphere processed；After phase adjusted, two of arbitrary neighborhood on system constellation figure
The code distance of constellation point is minimum.
Above-mentioned module can be distributed in a device, can also be distributed in multiple devices.Above-mentioned module can be merged into one
A module can also be further split into multiple submodule.
The device that signal multilayer is modulated in above-mentioned communication system can be independently arranged as an individual device, can also
It is integrated in base station and mobile terminal device.
The device of above-mentioned multiple access system uplink downlink power distribution, data distribution module 301 is the number of transmitting terminal
The information flow for having transmission demand according to multichannel is divided into, modulation matching module 302 set matched modulation system, star for multiline message stream
Seat figure mapping block 303 is to modulate the modulation system that matching module 302 is set to determine suitable planisphere mapping, signal generation mould
Data in planisphere mapping and information flow that block 304 is determined according to planisphere mapping block generate modulated signal, multilayer aliasing
Multiplexing signal and the planisphere mapping of generation are carried out merging treatment by module 305, realize the efficient life of multilayer modulated signal
Into and data to be transmitted and multilayer modulated signal efficient mapping, break through existing communication system and meeting counteracting serial interference demodulation
It is required that when the low bottleneck of multilayer modulated signal demodulation performance.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added to realize by software.Based on such understanding, this hair
Bright technical solution can be embodied in the form of software product, which can be stored in a non-volatile memory medium
(can be CD-ROM, USB flash disk, mobile hard disk etc.) in, it is used including some instructions so that a computer equipment (can be personal
Computer, server, network equipment etc.) perform method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that attached drawing is the schematic diagram of a preferred embodiment, module in attached drawing or
Flow is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in embodiment can describe be divided according to embodiment
It is distributed among the dress of embodiment, respective change can also be carried out and be located in one or more devices different from embodiment.It is above-mentioned
The module of embodiment can be merged into a module, can also be further split into multiple submodule.
Claims (10)
1. the method that signal multilayer is modulated in communication system, which is characterized in that include the following steps：
Step 1：According to the transmission demand of communication system, transmission data are divided into information flow of the multichannel with transmission demand；
Step 2：It is the modulation system that signal is determined per road information flow according to the transmission demand of multiline message stream；
Step 3：Planisphere is set to map for modulated signal all under each modulation system；
Step 4：It is mapped according to the data to be transferred of information flow and the planisphere of modulated signal, is per road information flow generation modulation letter
Number；
Step 5：According to the transmission demand and channel state information of multiline message stream, the modulated signal and constellation of multiline message stream
Figure mapping merges, and generates the multilayer modulated signal of communication system and planisphere mapping；
Wherein, the transmission demand of information flow includes：The QoS requirement of a plurality of business or a plurality of user's
QoS requirement.
2. the method that signal multilayer is modulated in communication system according to claim 1, which is characterized in that be every in step 2
Road information flow determines that the specific method of the modulation system of signal is：According to the transmission demand of every road information flow, digit key control is selected
The system of signal and keying mode；
Wherein, system includes：Binary system, the quaternary, quinary, octal system, novenary, hexadecimal and ten septenary；Keying
Mode includes：Amplitude-shift keying is modulated, shift keying modulation, phase shift keying modulation, quadrature amplitude modulation and Orthogonal Frequency Division Multiplexing tune
System.
3. the method that signal multilayer is modulated in communication system according to claim 2, which is characterized in that set in step 3
Planisphere mapping specific method be：
For each modulated signal on the planisphere corresponding to modulation system, one bit symbol is set；Wherein, same modulation methods
The code length of all symbols is all equal under formula, and code word is all different, and the number of all symbols is equal to modulation methods under same modulation system
System number in formula；Bit symbol is sequence of binary digits；
Different bit symbols is distributed for all modulated signals under each modulation system；And the bit symbol after distributing needs to meet
Condition：Under same modulation system, the code distance and two modulated signals of any two modulated signal institute distributing bit symbol are in star
The space length of the upper constellation point of seat figure is directly proportional.
4. the method that signal multilayer is modulated in communication system according to claim 3, which is characterized in that more in step 5
The modulated signal of road information flow merges, and generates the multilayer modulated signal of communication system and the specific method of planisphere mapping
For：
According to the transmission demand of multiline message stream, the constellation point in modulated signal and planisphere from different information flows is carried out
Amplitude adjusts；According to the transmission demand of multiline message stream, to the constellation in modulated signal and planisphere from different information flows
Click through horizontal phasing control；Multiple modulated signals after amplitude and phase adjustment are overlapped, generate the multilayer modulation letter of system
Number；Multiple planispheres after amplitude and phase adjustment are merged, generate the planisphere mapping of system；
Wherein, each constellation point after merging on system constellation figure be by one group from each information flow constellation point superposition and
Into, and all represent a different multilayer modulated signal；Multiple bit symbols of every group of constellation point are combined on system constellation figure
The bit symbol of constellation point generates the planisphere mapping of system.
5. the method that signal multilayer is modulated in communication system according to claim 4, which is characterized in that the phase tune
Whole method is specially：Modulated signal from same information flow is identical with the phase that constellation point on planisphere is adjusted；Through phase
After the adjustment of position, the code distance of two constellation points of arbitrary neighborhood is minimum on system constellation figure.
6. the device that signal multilayer is modulated in communication system, which is characterized in that including data distribution module, in data distribution module
Modulation matching module is connected with, modulates and is connected with planisphere mapping block on matching module, be connected on planisphere mapping block
Signal generation module is connected with multilayer aliasing module on signal generation module；Wherein：
Data distribution module：According to the transmission demand of communication system, transmission data are divided into information of the multichannel with transmission demand
Stream；
Modulate matching module：It is the modulation system that signal is determined per road information flow according to the transmission demand of multiline message stream；
Planisphere mapping block：Planisphere is set to map for modulated signal all under each modulation system；
Signal generation module：It is mapped according to the data to be transferred of information flow and the planisphere of modulated signal, is per the generation of road information flow
Modulated signal；
Multilayer aliasing module：According to the transmission demand and channel state information of multiline message stream, the modulation of multiline message stream is believed
Number and planisphere mapping merge, generate communication system multilayer modulated signal and planisphere mapping.
7. the device that signal multilayer is modulated in communication system according to claim 6, which is characterized in that modulation matching module
Zhong Weimei roads information flow determines that the modulation system of signal is specially：According to the transmission demand of every road information flow, digit key control is selected
The system of signal and keying mode；
Wherein, system includes：Binary system, the quaternary, quinary, octal system, novenary, hexadecimal and ten septenary；Keying
Mode includes：Amplitude-shift keying is modulated, shift keying modulation, phase shift keying modulation, quadrature amplitude modulation and Orthogonal Frequency Division Multiplexing tune
System.
8. the device that signal multilayer is modulated in communication system according to claim 7, which is characterized in that planisphere maps mould
Setting planisphere, which maps, in block is specially：
For each modulated signal on the planisphere corresponding to modulation system, one bit symbol is set；Wherein, same modulation methods
The code length of all symbols is all equal under formula, and code word is all different, and the number of all symbols is equal to modulation methods under same modulation system
System number in formula；Bit symbol is sequence of binary digits；
Different bit symbols is distributed for all modulated signals under each modulation system；And the bit symbol after distributing needs to meet
Condition：Under same modulation system, the code distance and the modulated signal of any two modulated signal institute distributing bit symbol are in star
The space length of the upper constellation point of seat figure is directly proportional.
9. the device that signal multilayer is modulated in communication system according to claim 8, which is characterized in that multilayer aliasing module
The middle modulated signal multiline message stream merges, and multilayer modulated signal and the planisphere mapping for generating communication system are specific
For：
According to the transmission demand of multiline message stream, the constellation point in modulated signal and planisphere from different information flows is carried out
Amplitude adjusts；According to the transmission demand of multiline message stream, to the constellation in modulated signal and planisphere from different information flows
Click through horizontal phasing control；Multiple modulated signals after amplitude and phase adjustment are overlapped, generate the multilayer modulation letter of system
Number；Multiple planispheres after amplitude and phase adjustment are merged, generate the planisphere mapping of system；
Wherein, each constellation point after merging on system constellation figure be by one group from each information flow constellation point superposition and
Into, and all represent a different multilayer modulated signal；Multiple bit symbols of every group of constellation point are combined on system constellation figure
The bit symbol of constellation point generates the planisphere mapping of system.
10. the device that signal multilayer is modulated in communication system according to claim 9, which is characterized in that multilayer aliasing mould
Phase adjustment in the block is specially：The phase phase that constellation point is adjusted in modulated signal and planisphere from same information flow
Together；After phase adjusted, the code distance of two constellation points of arbitrary neighborhood is minimum on system constellation figure.
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