CN107786478A - Digital signal modulating mehtod, demodulation method and device - Google Patents
Digital signal modulating mehtod, demodulation method and device Download PDFInfo
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- H—ELECTRICITY
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- H04L27/00—Modulated-carrier systems
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The present invention relates to a kind of digital signal modulating mehtod, demodulation method and device, digital signal modulating mehtod includes：Broadcast message is sent to receiving terminal and receives the Power Dynamic Range of return or calls the number of plies；Information source data are obtained according to the data signal to be modulated of acquisition；According to transmission rate request corresponding to default corresponding relation acquisition information source data and priority ranking is carried out to information source data；According to Power Dynamic Range or number of plies generation control data is called to be mapped to the outermost layer away from central point in default planisphere；Using outermost layer as first layer, figure layer is chosen from default planisphere successively and has been selected figure layer, by information source data correspondence mappings to having selected figure layer；The modulation system for having selected figure layer is obtained according to default planisphere, respectively the control data or information source data that are mapped to corresponding diagram layer are modulated to obtain corresponding modulated signal, modulated data signal is generated according to modulated signal and sent.Modulation efficiency can so be improved.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of digital signal modulating mehtod, demodulation method and device.
Background technology
The modulation system of data signal generally includes amplitude modulation, frequency modulation and phase modulation, wherein, pm mode is according to carrier phase
Quantity is divided into PSK (Phase Shift Keyin phase-shift keying (PSK)s), QPSK (QPSK), 8PSK and 16PSK etc..
It is traditional when being transmitted processing procedure to data signal, usually adjusted using a kind of modulation system of fixation
System demodulation, efficiency are low.
The content of the invention
Based on this, it is necessary in view of the above-mentioned problems, provide a kind of digital signal modulating mehtod of efficiency high, demodulation method and
Device.
A kind of digital signal modulating mehtod, including：
Broadcast message is sent to receiving terminal, and receives the power dynamic model that the receiving terminal returns according to the broadcast message
Enclose or call the number of plies；
Data signal to be modulated is obtained, plurality of information resources data are obtained according to the data signal to be modulated；
The transmission rate request according to corresponding to default corresponding relation obtains the information source data, with the information source data
The minimum information source data of transmission rate request are the information source data of limit priority, will according to the transmission rate of the information source data
The height asked carries out priority ranking to the information source data；
According to the Power Dynamic Range or the calling number of plies generation control data, the control data is mapped to pre-
If the outermost layer away from central point in planisphere；
Using the outermost layer as first layer, according to the direction for the central point for moving closer to the default planisphere, successively from
Chosen in the default planisphere and selected figure layer with the figure layer of the calling number of plies equal amount；
Originated from the second layer for having selected figure layer, according to the priority of the information source data from high to low, successively by institute
State information source data from outer layer toward internal layer be mapped to corresponding to selected figure layer；
The modulation system of figure layer has been selected according to obtaining the default planisphere, each modulation for having selected figure layer is respectively adopted
Mode is modulated to obtain each modulated signal for having selected figure layer to the control data or information source data that are mapped to corresponding diagram layer, according to
Each modulated signal for having selected figure layer generates modulated data signal and sent to the receiving terminal.
A kind of digital signal modulated device, including：
Broadcast message sending module, for sending broadcast message to receiving terminal, and the receiving terminal is received according to described wide
Broadcast the Power Dynamic Range of information return or call the number of plies；
Signal acquisition module, for obtaining data signal to be modulated, a variety of letters are obtained according to the data signal to be modulated
Source data；
Information source data order module, for the transmission rate according to corresponding to the default corresponding relation acquisition information source data
It is required that using the minimum information source data of transmission rate request in the information source data as the information source data of limit priority, according to institute
The height for stating the transmission rate request of information source data carries out priority ranking to the information source data；
Control data mapping block, for generating control data according to the Power Dynamic Range or the calling number of plies,
The control data is mapped to the outermost layer away from central point in default planisphere；
Figure layer chooses module, for using the outermost layer as first layer, according to moving closer in the default planisphere
The direction of heart point, selection and the figure layer of the calling number of plies equal amount obtain choosing figure from the default planisphere successively
Layer；
Information source data mapping module, for being originated from the second layer for having selected figure layer, according to the excellent of the information source data
First level from it is high toward it is low, successively by different information source data from outer layer toward internal layer be mapped to corresponding to selected figure layer；
Multilayer modulation module, for having selected the modulation system of figure layer according to the default planisphere acquisition, adopt respectively
Respectively selected with respectively having selected the modulation system of figure layer to be modulated to obtain to the control data or information source data that are mapped to corresponding diagram layer
The modulated signal of figure layer, according to the modulated data signal of modulated signal generation for respectively having selected figure layer and send to the receiving terminal.
Above-mentioned digital signal modulating mehtod and device, by sending broadcast message to receiving terminal, and receive receiving terminal according to
The Power Dynamic Range or call the number of plies that broadcast message returns, then obtain data signal to be modulated, are believed according to numeral to be modulated
Number obtain plurality of information resources data, according to default corresponding relation obtain information source data corresponding to transmission rate request, with information source number
, will according to the transmission rate of information source data according to the information source data that the minimum information source data of middle transmission rate request are limit priority
The height asked carries out priority ranking to information source data；Control data is generated according to Power Dynamic Range or the calling number of plies simultaneously,
Control data is mapped to the outermost layer away from central point in default planisphere；Using outermost layer as first layer, according to moving closer to
The direction of the central point of default planisphere, chosen successively from default planisphere with calling the figure layer of number of plies equal amount to obtain
Select figure layer；From having selected the second layer of figure layer to originate, according to the priority of information source data from high to low successively by information source data from outer
The past internal layer of layer has selected figure layer corresponding to being mapped to；The modulation system for having selected figure layer is obtained according to default planisphere, is respectively adopted each
The modulation system of figure layer has been selected to be modulated to obtain to the control data or information source data that are mapped to corresponding diagram layer and respectively selected figure layer
Modulated signal, according to respectively having selected the modulated signal of figure layer to generate modulated data signal and sent to receiving terminal.In this way, using pre-
If data signal to be modulated is carried out corresponding modulating by planisphere according to Different Modulations, modulation efficiency is high.
A kind of digital demodulation signal method, including：
The broadcast message that receiving end/sending end is sent, and Power Dynamic Range is returned to according to the broadcast message or calls the number of plies
To the transmitting terminal；
The modulated data signal that the transmitting terminal is sent is received, and obtains the peak power of the modulated data signal, root
Maximum amplitude is obtained according to the peak power, and using the outermost layer of the central point away from default planisphere as first layer, according to institute
State the modulated signal that maximum amplitude chooses the first layer from the modulated data signal；
The modulation system of the first layer is obtained according to the default planisphere, and according to the modulation system of the first layer
The modulated signal of the first layer is demodulated, obtains control data；
The calling number of plies is obtained according to the control data, according to the central point for moving closer to the default planisphere
Direction, chosen from the default planisphere and selected figure layer with the figure layer of the calling number of plies equal amount, and according to institute
State maximum amplitude and default amplitude proportion and obtained from the modulated data signal and select figure layer pair in addition to the first layer
The modulated signal answered；
First layer described in distance is farthest in figure layer figure layer has been selected as most last layer using described；
The current error rate of most last layer described in obtaining, and currently acceptable model is obtained according to the Power Dynamic Range
Enclose；
Judge the current error rate whether in the current acceptable ranges；
If so, obtaining the modulation system for having selected figure layer in addition to the first layer according to the default planisphere, adopt respectively
The modulated signal of corresponding figure layer is demodulated to obtain corresponding letter with the modulation system for having selected figure layer in addition to the first layer
Source data, demodulated signal is generated according to the information source data；
If it is not, using the direction of the central point away from the default planisphere as direction outward, most last layer outward one described in general
The figure layer of layer returns to the current error rate of most last layer described in the acquisition as new most last layer, and according to the power
Dynamic range obtains the step of current acceptable ranges.
A kind of digital demodulation signal device, including：
Broadcast message responder module, the broadcast message sent for receiving end/sending end, and returned according to the broadcast message
Power Dynamic Range calls the number of plies to the transmitting terminal；
First layer modulated signal acquisition module, the modulated data signal sent for receiving the transmitting terminal, and obtain institute
The peak power of modulated data signal is stated, maximum amplitude is obtained according to the peak power, and with away from default planisphere
The outermost layer of heart point is first layer, chooses the modulation of the first layer from the modulated data signal according to the maximum amplitude
Signal；
First layer demodulation module, for the modulation system according to the default planisphere acquisition first layer, and according to
The modulation system of the first layer is demodulated to described most one layer of modulated signal, obtains control data；
Multilayer modulated signal acquisition module, for obtaining the calling number of plies according to the control data, according to gradually leaning on
The direction of the central point of the nearly default planisphere, chosen and the calling number of plies equal amount from the default planisphere
Figure layer has been selected figure layer, and is obtained and removed from the modulated data signal according to the maximum amplitude and default amplitude proportion
Modulated signal corresponding to figure layer has been selected outside the first layer；
Most last layer determining module, for having selected first layer described in distance is farthest in figure layer figure layer as most end using described
Layer；
Bit error rate acquisition module, for obtaining the current error rate of the most last layer, and according to the power dynamic model
Enclose acquisition current acceptable ranges；
Bit error rate detection module, for judging the current error rate whether in the current acceptable ranges；
Multilayer demodulation module, for when the current error rate is in the current acceptable ranges, according to described pre-
If planisphere obtains the modulation system for having selected figure layer in addition to the first layer, the choosing figure in addition to the first layer is respectively adopted
The modulated signal of corresponding figure layer is demodulated to obtain corresponding information source data by the modulation system of layer, is given birth to according to the information source data
Into demodulated signal；
Most last layer update module, for when the current error rate is not in the current acceptable ranges, with remote
The direction of the central point of the default planisphere is direction outward, using the most last layer outward one layer of figure layer as new most end
Layer, and the current error rate of most last layer described in the bit error rate acquisition module reacquisition is controlled, and moved according to the power
State scope obtains current acceptable ranges.
Above-mentioned digital demodulation signal method and apparatus, the broadcast message sent by receiving end/sending end, and believed according to broadcast
Breath returns to Power Dynamic Range or calls the number of plies to transmitting terminal；Then the modulated data signal that receiving end/sending end is sent, and obtain
The peak power of modulated data signal, maximum amplitude is obtained according to peak power, and with the central point away from default planisphere
Outermost layer is first layer, chooses the modulated signal of first layer from modulated data signal according to maximum amplitude；Then according to default
Planisphere obtains the modulation system of first layer, and the modulated signal of first layer is demodulated according to the modulation system of first layer,
Obtain control data；Obtained according to control data and call the number of plies, according to the direction for the central point for moving closer to default planisphere, from
The figure layer equal with calling number of plies quantity is chosen in default planisphere and has been selected figure layer, and according to maximum amplitude and default width
Value ratio obtains the modulated signal for having selected figure layer in addition to first layer from modulated data signal；Distance first in figure layer will have been selected
The farthest figure layer of layer is used as most last layer, obtains the current error rate of most last layer, and obtain according to Power Dynamic Range and currently may be used
Receive scope, and judge current error rate whether in current acceptable ranges；If so, then obtained according to default planisphere except the
The modulation system for having selected figure layer outside one layer, the modulation system for having selected figure layer being respectively adopted in addition to first layer will correspond to figure layer
Modulated signal is demodulated to obtain corresponding information source data, and demodulated signal is generated according to information source data；If it is not, then with away from default
The direction of the central point of planisphere is direction outward, using most last layer outward one layer of figure layer as new most last layer, reacquisition
The current error rate of most last layer, and current acceptable ranges are obtained according to Power Dynamic Range, to detect again.In this way,
The layer count called can be adjusted according to current transmission state to be demodulated, and demodulate efficiency high.
Brief description of the drawings
Fig. 1 is the flow chart of digital signal modulating mehtod in an embodiment；
Fig. 2 is the schematic diagram that planisphere is preset in an embodiment；
Fig. 3 is the flow chart of digital demodulation signal method in an embodiment；
Fig. 4 is the module frame chart of digital signal modulated device in an embodiment；
Fig. 5 is the module frame chart of digital demodulation signal device in an embodiment.
Embodiment
With reference to figure 1, the digital signal modulating mehtod in an embodiment, comprise the following steps.
S100：Broadcast message is sent to receiving terminal, and receives the Power Dynamic Range that receiving terminal returns according to broadcast message
Or call the number of plies.
Power Dynamic Range refers to the peak power dynamic range corresponding with minimum power in transmitting procedure.
S110：Data signal to be modulated is obtained, plurality of information resources data are obtained according to data signal to be modulated.
Data signal to be modulated can be divided into plurality of information resources data according to data type or transmission requirement, wait to adjust by obtaining
The information source data of data signal processed, conveniently subsequently treating modulated signal carries out classification modulation treatment.Specifically, different information source number
According to that can be corresponding different data types, e.g., data signal to be modulated be vision signal, the information source data that vision signal includes
There are voice data and image data；Different information source data can also be corresponding different data flow, e.g., data signal to be modulated
For image data, the information source data of corresponding image data have including color lump information and detailed information.
S120：The transmission rate request according to corresponding to default corresponding relation obtains information source data, to be passed in information source data
The minimum information source data of defeated rate requirement are the information source data of limit priority, according to the height of the transmission rate request of information source data
It is low that priority ranking is carried out to information source data.
Default corresponding relation refer to the corresponding relation of information source data and transmission rate request or refer to information source data with
The corresponding relation of transmission reliability requirement；Wherein, transmission reliability is required higher, and the transmission rate request of corresponding information source data is got over
It is low.By higher to information source data progress priority ranking, the lower information source data of transmission rate request, priority.
S130：According to Power Dynamic Range or number of plies generation control data is called, control data is mapped to default constellation
Outermost layer away from central point in figure.
Default planisphere refers to the planisphere for modulated digital signal pre-set.Default planisphere includes multiple figures
Layer, each figure layer are provided with constellation point, and different figure layers correspond to different modulation systems, transmitted corresponding to different modulation systems
Speed is different, and the figure layer spacing of planisphere represents interlayer amplitude difference, and the phase difference between the adjacent constellation point of same figure layer is equal.In advance
If modulation system corresponding to each figure layer of planisphere can be set according to the actual requirements, in the present embodiment, the modulation of planisphere is preset
Mode is MPSK (multiple phase-shift keying), different figure layers, and M value is different, according to moving closer in default planisphere
The direction of heart point, M value are bigger.Default planisphere can obtain before step S100.
Control data can after obtaining the calling number of plies according to Power Dynamic Range, be generated according to the calling number of plies, can also
It is directly according to calling number of plies generation.It can be specifically according to Power Dynamic Range to be obtained according to Power Dynamic Range and call the number of plies
Information source data to be classified with the transmission rate request of information source data, obtained classification quantity adds one to be to call the number of plies, its
In information source data are classified, can will belong to information source number corresponding to the transmission rate request of same scheduled rate grade
According to as same class.By generating control data according to the calling number of plies, so as to which control data carries the information of the calling number of plies.
It is appreciated that in other embodiments, it can also believe transmission channel according to corresponding to obtaining data signal to be modulated
Breath, the corresponding relation of information source data and priority sequence number is obtained according to the information source data after priority ranking, is believed according to transmission
The corresponding relation and calling number of plies generation control data of road information, information source data and priority sequence number.Wherein, transmission channel is believed
Cease the channel for indicating transmission signal to be modulated；Priority sequence number is used for the sequence number for representing the priority of corresponding information source data,
Sequence number is lower, represents that the priority of information source data is higher.For example, signal to be modulated is vision signal；The letter of transmission video signal
Road is channel 1, and vision signal includes image data and voice data, and therefore, it is 3 that can obtain calling the number of plies.The biography of image data
Defeated rate requirement is higher than the transmission rate request of voice data, obtains the priority serial number 1 of voice data, image data it is excellent
First level serial number 2.Therefore, the information that the control data of corresponding vision signal includes is：It is 3 to call the number of plies, and transmission channel is letter
Road 1, the priority serial number 1 of voice data, the priority serial number 2 of image data.
S140：Using outermost layer as first layer, according to the direction for the central point for moving closer to default planisphere, successively from default
Chosen in planisphere with calling the figure layer of number of plies equal amount to be selected figure layer.
Figure layer is chosen to choose in sequence from default planisphere, for example, the calling number of plies of vision signal is 3, with first
Layer be originate, it is corresponding that to have selected figure layer be first layer, the second layer and third layer.
S150：From having selected the second layer of figure layer to originate, according to the priority of information source data from high to low, successively by information source number
According to from outer layer toward internal layer be mapped to corresponding to selected figure layer.
Different information source data are mapped to different levels, i.e., different information source data from outer layer toward internal layer according to priority
Corresponding different modulation system.Specifically, the higher information source data of priority, the center of the default planisphere of figure layer distance of mapping
Point is more remote, and transmission rate is smaller.For example, the priority serial number 1 of the voice data of vision signal, the priority sequence of image data
Number be 2, then voice data be mapped to the second layer, image data is mapped to third layer.
S160：The modulation system for having selected figure layer is obtained according to default planisphere, each modulation methods for having selected figure layer are respectively adopted
Formula is modulated to obtain each modulated signal for having selected figure layer to the control data or information source data that are mapped to corresponding diagram layer, according to each
The modulated signal of figure layer has been selected to generate modulated data signal and send to receiving terminal.
The information source data of each figure layer are modulated by way of each figure layer is respectively adopted, obtain modulated data signal, can be achieved
According to overall transfer after the realization classification modulation of the transmission rate request of different information source data.
Above-mentioned digital signal modulating mehtod, by sending broadcast message to receiving terminal, and receive receiving terminal and believed according to broadcast
Cease the Power Dynamic Range returned or call the number of plies, then obtain data signal to be modulated, obtained according to data signal to be modulated
Plurality of information resources data, the transmission rate request according to corresponding to default corresponding relation obtains information source data, to be passed in information source data
The minimum information source data of defeated rate requirement are the information source data of limit priority, according to the height of the transmission rate request of information source data
It is low that priority ranking is carried out to information source data；Simultaneously according to Power Dynamic Range or calling number of plies generation control data, will control
Data are mapped to the outermost layer away from central point in default planisphere；Using outermost layer as first layer, according to moving closer to default star
The direction of the central point of seat figure, chosen successively from default planisphere with calling the figure layer of number of plies equal amount to obtain choosing figure
Layer；It is successively that information source data are past from outer layer from high to low according to the priority of information source data from having selected the second layer of figure layer to originate
Internal layer has selected figure layer corresponding to being mapped to；The modulation system for having selected figure layer is obtained according to default planisphere, is respectively adopted and has respectively selected
The modulation system of figure layer is modulated to obtain each tune for having selected figure layer to the control data or information source data that are mapped to corresponding diagram layer
Signal processed, according to the modulated data signal of modulated signal generation for respectively having selected figure layer and send to receiving terminal.In this way, using default star
Data signal to be modulated is carried out corresponding modulating by seat figure according to Different Modulations, and modulation efficiency is high.
In one applies example, it is star constellation to preset planisphere, and it is 2 to preset modulation system corresponding to i-th layer of planispherei +1PSK or 4iPSK, and i-th layer of phase angle staggered with the interlayer of i+1 layer isOrBy in figure layer and modulation
Exponential function is introduced in the corresponding relation of mode, apparent quantization areas border can be obtained.
With reference to figure 2, in the present embodiment, preset on planisphere, outermost modulation system is π/4QPSK, and the second layer is
8PSK, third layer 16PSK.It is appreciated that in other embodiments, outermost modulation system can also be QPSK.
In one embodiment, i-th layer of phase angle staggered with the interlayer of i+1 layer isI-th layer of default planisphere
Amplitude proportion with first layer is：
Wherein, i be figure layer sequence number, riAmplitude proportion for i-th layer with first layer.
By setting i-th layer and the amplitude proportion relation of first layer, the difference in magnitude each figure layer is defined, Ke Yizeng
Add the quantization areas of the central spot constellation point close to default planisphere.It is appreciated that in other embodiments, i-th layer and i-th
When the phase angle that+1 layer of interlayer staggers is other expression formulas, presets i-th layer of planisphere and the amplitude proportion of first layer also may be used
Think other expression formulas.
With reference to figure 3, the digital demodulation signal method in an embodiment, comprise the following steps.
S200：The broadcast message that receiving end/sending end is sent, and Power Dynamic Range or calling layer are returned to according to broadcast message
Count to transmitting terminal.
Power Dynamic Range refers to the peak power dynamic range corresponding with minimum power in transmitting procedure.
S210：The modulated data signal that receiving end/sending end is sent, and the peak power of modulated data signal is obtained, according to peak
Be worth power and obtain maximum amplitude, and using the outermost layer of the central point away from default planisphere as first layer, according to maximum amplitude from
The modulated signal of first layer is chosen in modulated data signal.
Modulated data signal treats modulated digital signal by Different Modulations and is modulated to obtain.Peak power refers in short-term
In the peak power that reaches, maximum amplitude for corresponding amplitude maximum in the more modulation signal of modulated data signal modulation
Signal, correspond to the modulated signal of the first layer of default planisphere.
S220：The modulation system of first layer is obtained according to default planisphere, and according to the modulation system of first layer to first
The modulated signal of layer is demodulated, and obtains control data.
Different figure layers correspond to different modulation systems, and transmission rate corresponding to different modulation systems is different.Example is applied one
In, it is star constellation to preset planisphere, and it is 2 to preset modulation system corresponding to i-th layer of planispherei+1PSK or 4iPSK, and the
The phase angle that the interlayer of i layers and i+1 layer staggers isOrBy drawing in the corresponding relation of figure layer and modulation system
Enter exponential function, apparent quantization areas border can be obtained.
In the present embodiment, the modulation system of first layer is π/4QPSK, and the modulated signal of first layer is entered using π/4QPSK
Row demodulation.It is appreciated that in other embodiments, the modulation system of first layer can also be QPSK.
S230：Obtained according to control data and call the number of plies, according to the direction for the central point for moving closer to default planisphere, from
Chosen in default planisphere with calling the figure layer of number of plies equal amount to be selected figure layer, and according to maximum amplitude and default width
Value ratio obtains from modulated data signal and has selected modulated signal corresponding to figure layer in addition to first layer.
When transmitting terminal is modulated, control data, therefore information of the control data including calling the number of plies are generated according to the number of plies is called.
Default amplitude proportion is i-th layer of amplitude proportion with first layer.In one embodiment, i-th layer and i+1 layer
The phase angle that interlayer staggers isDefault amplitude proportion is：
Wherein, i be figure layer sequence number, riAmplitude proportion for i-th layer with first layer.
By setting i-th layer and the amplitude proportion relation of first layer, the difference in magnitude each figure layer is defined, Ke Yizeng
Add the quantization areas of the central spot constellation point close to default planisphere.It is appreciated that in other embodiments, i-th layer and i-th
When the phase angle that+1 layer of interlayer staggers is other expression formulas, presets i-th layer of planisphere and the amplitude proportion of first layer also may be used
Think other expression formulas.
S240：Figure layer farthest apart from first layer in figure layer will have been selected as most last layer.
For example, figure layer has been selected to include the second layer and third layer, then using third layer as most last layer.
S250：The current error rate of most last layer is obtained, and current acceptable ranges are obtained according to Power Dynamic Range.
Current acceptable ranges, refer to bit error rate tolerance interval corresponding to Power Dynamic Range of the channel in current transmission；
Power Dynamic Range is wider, and the lowest bit error rate of tolerance interval is smaller.
S260：Judge current error rate whether in current acceptable ranges.If so, then perform step S270；If it is not, then
Perform step S280.
S270：The modulation system for having selected figure layer in addition to first layer is obtained according to default planisphere, is respectively adopted except first
The modulation system of figure layer has been selected to be demodulated the modulated signal of corresponding figure layer to obtain corresponding information source data outside layer, according to letter
Source data generates demodulated signal.
Current error rate represents that the bit error rate of most last layer is subjected to, most end layer can be called to enter in current acceptable ranges
Row demodulation.Now, while call the second layer to be demodulated to each figure layer of most last layer, obtain the information source data of each figure layer.
S280：Using the direction of the central point away from default planisphere as direction outward, by most last layer one layer of figure layer outward
As new most last layer, and return to step S250.
Current error rate represents non-adjustable and is demodulated with most last layer not in current acceptable ranges.Now, toward outer layer
Retract a figure layer and detect current error rate again afterwards.
The Power Dynamic Range of channel determines the current acceptable ranges of figure layer, so as to determine that the current error rate of figure layer is
It is no acceptable.By proceeding by the detection of current error rate from innermost layer corresponding to the calling number of plies, until working as corresponding to figure layer
The preceding bit error rate in current acceptable ranges, is now calling the second layer to be demodulated to the figure layer finally detected corresponding to figure layer,
The figure layer called according to the adjustment of the Power Dynamic Range of transmission can be realized, improves demodulation efficiency.For example, modulated data signal is
Image data, image data include color lump information and detailed information；Default planisphere first layer corresponds to the modulation of control data
Signal；Control data is obtained after being demodulated using the modulation system of first layer to first layer, is obtained and believed according to control data
Breath：It is 3 layers to call the number of plies, and the second layer is the color lump modulated signal of image data, and third layer modulates letter for the details of image data
Number.The current error rate of third layer is detected first whether in the tolerance interval of third layer, if then calling the second layer simultaneously
The demodulation of corresponding modulating signal is carried out with third layer；If it is not, then retracting the second layer, whether the bit error rate of the second layer is detected second
In the tolerance interval of layer；If so, then calling the second layer to be demodulated, otherwise stop demodulation.
Above-mentioned digital demodulation signal method, the broadcast message sent by receiving end/sending end, and returned according to broadcast message
Power Dynamic Range calls the number of plies to transmitting terminal；Then the modulated data signal that receiving end/sending end is sent, and obtain modulated number
The peak power of word signal, maximum amplitude is obtained according to peak power, and with the outermost layer of the central point away from default planisphere
For first layer, the modulated signal of first layer is chosen from modulated data signal according to maximum amplitude；Then according to default planisphere
The modulation system of first layer is obtained, and the modulated signal of first layer is demodulated according to the modulation system of first layer, is controlled
Data processed；Obtained according to control data and call the number of plies, according to the direction for the central point for moving closer to default planisphere, from default star
The figure layer equal with calling number of plies quantity is chosen in seat figure and has been selected figure layer, and according to maximum amplitude and default amplitude proportion
The modulated signal for having selected figure layer in addition to first layer is obtained from modulated data signal；It will select farthest apart from first layer in figure layer
Figure layer be used as most last layer, obtain the current error rate of most last layer, and currently acceptable model is obtained according to Power Dynamic Range
Enclose, and judge current error rate whether in current acceptable ranges；If so, then obtained according to default planisphere in addition to first layer
The modulation system for having selected figure layer, be respectively adopted in addition to first layer selected figure layer modulation system will corresponding figure layer modulated letter
Information source data corresponding to number being demodulated to obtain, demodulated signal is generated according to information source data；If it is not, then with away from default planisphere
The direction of central point be direction outward, using most last layer outward one layer of figure layer as new most last layer, reacquisition most last layer
Current error rate, and according to Power Dynamic Range obtain current acceptable ranges, to detect again.In this way, can root
The layer count called according to current transmission state adjustment is demodulated, and demodulates efficiency high.
With reference to figure 4, the digital signal modulated device in an embodiment, including：Broadcast message sending module 100, signal obtain
Modulus block 110, information source data order module 120, control data mapping block 130, figure layer choose module 140, information source data are reflected
Penetrate module 150 and multilayer modulation module 160.
Broadcast message sending module 100 is used to send broadcast message to receiving terminal, and receives receiving terminal according to broadcast message
The Power Dynamic Range of return calls the number of plies.
Signal acquisition module 110 is used to obtain data signal to be modulated, and plurality of information resources is obtained according to data signal to be modulated
Data.
Information source data order module 120 is used for the transmission rate according to corresponding to default corresponding relation obtains information source data will
Ask, the information source data using the minimum information source data of transmission rate request in information source data as limit priority, according to information source data
Transmission rate request height to information source data carry out priority ranking.
Control data mapping block 130 is used for according to Power Dynamic Range or calls number of plies generation control data, will control
Data are mapped to the outermost layer away from central point in default planisphere.
Figure layer is chosen module 140 and is used for using outermost layer as first layer, according to the central point for moving closer to default planisphere
Direction, chosen successively from default planisphere with calling the figure layer of number of plies equal amount to be selected figure layer.
Information source data mapping module 150 is used for from having selected the second layer of figure layer to originate, according to the priority of information source data from
It is high toward it is low, successively by different information source data from outer layer toward internal layer be mapped to corresponding to selected figure layer.
Multilayer modulation module 160 is used to obtain the modulation system for having selected figure layer according to default planisphere, is respectively adopted respectively
The modulation system of figure layer is selected to be modulated to obtain to the control data or information source data that are mapped to corresponding diagram layer and respectively selected figure layer
Modulated signal, according to the modulated data signal of modulated signal generation for respectively having selected figure layer and send to receiving terminal.
In one embodiment, it is star constellation to preset planisphere, and modulation system corresponding to i-th layer of default planisphere is
2i+1PSK or 4iPSK, and i-th layer of phase angle staggered with the interlayer of i+1 layer isOr
Above-mentioned digital signal modulated device, broadcast message is sent to receiving terminal by broadcast message sending module 100, and connect
Power Dynamic Range or the calling number of plies that receiving terminal returns according to broadcast message are received, then signal acquisition module 110, which obtains, waits to adjust
Data signal processed, plurality of information resources data are obtained according to data signal to be modulated；Information source data order module 120 is according to default right
Answer transmission rate request corresponding to Relation acquisition information source data, the information source data minimum using transmission rate request in information source data as
The information source data of limit priority, priority row is carried out to information source data according to the height of the transmission rate request of information source data
Sequence；Control data mapping block 130 according to Power Dynamic Range or calls number of plies generation control data simultaneously, and control data is reflected
It is mapped to the outermost layer away from central point in default planisphere；Figure layer chooses module 140 using outermost layer as first layer, according to gradually leaning on
The direction of the central point of nearly default planisphere, chosen successively from default planisphere with calling the figure layer of number of plies equal amount to obtain
Figure layer is selected；Information source data mapping module 150 from having selected the second layer of figure layer to originate, according to the priority of information source data from height to
It is low successively by information source data from outer layer toward internal layer be mapped to corresponding to selected figure layer；Multilayer modulation module 160 is according to default constellation
Figure, which obtains, has selected the modulation system of figure layer, and each modulation system for having selected figure layer is respectively adopted to being mapped to the control number of corresponding diagram layer
According to or information source data be modulated to obtain each modulated signal for having selected figure layer, generated according to the modulated signal for respectively having selected figure layer modulated
Data signal is simultaneously sent to receiving terminal.In this way, vision signal to be modulated is entered according to Different Modulations using default planisphere
Row corresponding modulating, modulation efficiency are high.
With reference to figure 5, the digital demodulation signal device in an embodiment, including broadcast message responder module 200, first layer are adjusted
Signal acquisition module 210 processed, first layer demodulation module 220, most multilayer modulated signal acquisition module 230, last layer determining module
240th, bit error rate acquisition module 250, bit error rate detection module 260, multilayer demodulation module 270 and most last layer update module 280.
Broadcast message responder module 200 is used for the broadcast message that receiving end/sending end is sent, and returns to work(according to broadcast message
Rate dynamic range calls the number of plies to transmitting terminal.
First layer modulated signal acquisition module 210 is used for the modulated data signal that receiving end/sending end is sent, and obtains modulated
The peak power of data signal, maximum amplitude is obtained according to peak power, and with the outermost of the central point away from default planisphere
Layer is first layer, chooses the modulated signal of first layer from modulated data signal according to maximum amplitude.
First layer demodulation module 220 is used for the modulation system according to corresponding to default planisphere obtains first layer, and according to the
One layer of modulation system is demodulated to most one layer of modulated signal, obtains control data.
Multilayer modulated signal acquisition module 230, which is used to be obtained according to control data, calls the number of plies, according to moving closer to preset
The direction of the central point of planisphere, chosen from default planisphere with calling the figure layer of number of plies equal amount to be selected figure layer,
And obtained according to maximum amplitude and default amplitude proportion from modulated data signal in addition to first layer selected figure layer corresponding to
Modulated signal.
Most last layer determining module 240 is used to that figure layer farthest apart from first layer in figure layer will to have been selected as most last layer.
Bit error rate acquisition module 250 is used for the current error rate for obtaining most last layer, and is obtained according to Power Dynamic Range
Current acceptable ranges.
Whether bit error rate detection module 260 is used to judge current error rate in current acceptable ranges.
Multilayer demodulation module 270 is used for when current error rate is in current acceptable ranges, is obtained according to default planisphere
The modulation system for having selected figure layer outside first layer is removed, the modulation system for having selected figure layer being respectively adopted in addition to first layer will be corresponding
The modulated signal of figure layer is demodulated to obtain corresponding information source data, and demodulated signal is generated according to information source data.
Most last layer update module 280 is used for when current error rate is not in current acceptable ranges, with away from default star
The direction of the central point of seat figure is direction outward, and using most last layer, one layer of figure layer as most last layer newly, and controls error code outward
Rate acquisition module 250 reacquires the current error rate of most last layer, and obtains currently acceptable model according to Power Dynamic Range
Enclose.
In one embodiment, it is star constellation to preset planisphere, and modulation system corresponding to i-th layer of default planisphere is
2i+1PSK or 4iPSK, and the phase angle of the interlayer phase shifting of i-th layer and i+1 layer isOr
Above-mentioned digital demodulation signal device, the broadcast message sent by the receiving end/sending end of broadcast message responder module 200,
And Power Dynamic Range is returned to according to broadcast message or calls the number of plies to transmitting terminal；Then first layer modulated signal acquisition module
The modulated data signal that 210 receiving end/sending ends are sent, and the peak power of modulated data signal is obtained, obtained according to peak power
Maximum amplitude, and using the outermost layer of the central point away from default planisphere as first layer, believed according to maximum amplitude from modulated numeral
The modulated signal of first layer is chosen in number；Then first layer demodulation module 220 is according to corresponding to default planisphere obtains first layer
Modulation system, and the modulated signal of first layer is demodulated according to the modulation system of first layer, obtain control data；Multilayer is adjusted
Signal acquisition module 230 processed obtains according to control data and calls the number of plies, according to the side for the central point for moving closer to default planisphere
To, choose with calling the equal figure layer of number of plies quantity to be selected figure layer, and according to maximum amplitude and in advance from default planisphere
If amplitude proportion the modulated signal for having selected figure layer in addition to first layer is obtained from modulated data signal；Most last layer determining module
240 will select figure layer farthest apart from first layer in figure layer as most last layer；Bit error rate acquisition module 250 obtains working as most last layer
The preceding bit error rate, and current acceptable ranges are obtained according to Power Dynamic Range；Bit error rate detection module 260 judges current error code
Whether rate is in current acceptable ranges；If so, then multilayer demodulation module 270 is obtained in addition to first layer according to default planisphere
The modulation system of figure layer has been selected, has been respectively adopted and has selected the modulation system of figure layer to correspond to the modulated signal of figure layer in addition to first layer
It is demodulated to obtain corresponding information source data, demodulated signal is generated according to information source data；If it is not, then most last layer update module 280
Using the direction of the central point away from default planisphere as direction outward, using most last layer outward one layer of figure layer as new most end
Layer, control bit error rate acquisition module 250 reacquire the current error rate of most last layer, and are obtained and worked as according to Power Dynamic Range
Preceding tolerance interval, to detect again.Solved in this way, the layer count called can be adjusted according to current transmission state
Adjust, demodulate efficiency high.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
- A kind of 1. digital signal modulating mehtod, it is characterised in that including：Broadcast message is sent to receiving terminal, and receive Power Dynamic Range that the receiving terminal returns according to the broadcast message or Call the number of plies；Data signal to be modulated is obtained, plurality of information resources data are obtained according to the data signal to be modulated；The transmission rate request according to corresponding to default corresponding relation obtains the information source data, to be transmitted in the information source data Rate requirement minimum information source data are the information source data of limit priority, according to the transmission rate request of the information source data Height carries out priority ranking to the information source data；According to the Power Dynamic Range or the calling number of plies generation control data, the control data is mapped to default star Outermost layer away from central point in seat figure；Using the outermost layer as first layer, according to the direction for the central point for moving closer to the default planisphere, successively from described Chosen in default planisphere and selected figure layer with the figure layer of the calling number of plies equal amount；Originated from the second layer for having selected figure layer, according to the priority of the information source data from high to low, successively by the letter Source data from outer layer toward internal layer be mapped to corresponding to selected figure layer；The modulation system of figure layer has been selected according to obtaining the default planisphere, each modulation system for having selected figure layer is respectively adopted It is modulated to obtain each modulated signal for having selected figure layer to the control data or information source data for being mapped to corresponding diagram layer, according to respectively The modulated signal of figure layer is selected to generate modulated data signal and send to the receiving terminal.
- 2. digital signal modulating mehtod according to claim 1, it is characterised in that the default planisphere is circular constellations Figure, modulation system corresponding to i-th layer of the default planisphere are 2i+1PSK or 4iPSK, and the interlayer of i-th layer and i+1 layer The phase angle staggered isOr
- 3. digital signal modulating mehtod according to claim 2, it is characterised in that the interlayer of described i-th layer and i+1 layer The phase angle staggered isI-th layer of the default planisphere and the amplitude proportion of the first layer are：<mrow> <msub> <mi>r</mi> <mi>i</mi> </msub> <mo>=</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mn>2</mn> <mo>&CenterDot;</mo> <mi>i</mi> <mo>-</mo> <mn>3</mn> </mrow> <msup> <mn>2</mn> <mi>i</mi> </msup> </mfrac> <mi>&pi;</mi> <mo>)</mo> </mrow> <mo>-</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <mo>(</mo> <mrow> <mfrac> <mrow> <mn>2</mn> <mo>&CenterDot;</mo> <mi>i</mi> <mo>-</mo> <mn>3</mn> </mrow> <msup> <mn>2</mn> <mi>i</mi> </msup> </mfrac> <mo>+</mo> <mfrac> <mn>1</mn> <mn>4</mn> </mfrac> </mrow> <mo>)</mo> <mi>&pi;</mi> <mo>)</mo> </mrow> <mo>;</mo> </mrow>Wherein, i be figure layer sequence number, riAmplitude proportion for i-th layer with the first layer.
- A kind of 4. digital demodulation signal method, it is characterised in that including：The broadcast message that receiving end/sending end is sent, and Power Dynamic Range is returned to according to the broadcast message or calls the number of plies to institute State transmitting terminal；The modulated data signal that the transmitting terminal is sent is received, and obtains the peak power of the modulated data signal, according to institute State peak power and obtain maximum amplitude, and using the outermost layer of the central point away from default planisphere as first layer, according to it is described most Amplitude chooses the modulated signal of the first layer from the modulated data signal；Obtain the modulation system of the first layer according to the default planisphere, and according to the modulation system of the first layer to institute The modulated signal for stating first layer is demodulated, and obtains control data；The calling number of plies is obtained according to the control data, according to the side for the central point for moving closer to the default planisphere To, chosen from the default planisphere and selected figure layer with the figure layer of the calling number of plies equal amount, and according to described Maximum amplitude and default amplitude proportion obtain from the modulated data signal has selected figure layer corresponding in addition to the first layer Modulated signal；First layer described in distance is farthest in figure layer figure layer has been selected as most last layer using described；The current error rate of most last layer described in obtaining, and current acceptable ranges are obtained according to the Power Dynamic Range；Judge the current error rate whether in the current acceptable ranges；If so, obtaining the modulation system for having selected figure layer in addition to the first layer according to the default planisphere, it is respectively adopted and removes The modulated signal of corresponding figure layer is demodulated to obtain corresponding information source number by the modulation system for having selected figure layer outside the first layer According to according to information source data generation demodulated signal；If it is not, using the direction of the central point away from the default planisphere as direction outward, by one layer outward of the most last layer Figure layer returns to the current error rate of most last layer described in the acquisition as new most last layer, and according to power dynamic Scope obtains the step of current acceptable ranges.
- 5. digital demodulation signal method according to claim 4, it is characterised in that the default planisphere is circular constellations Figure, modulation system corresponding to i-th layer of the default planisphere are 2i+1PSK or 4iPSK, and the interlayer of i-th layer and i+1 layer The phase angle of phase shifting isOr
- 6. digital signal modulating mehtod according to claim 5, it is characterised in that the interlayer of described i-th layer and i+1 layer The phase angle staggered isThe default amplitude proportion is i-th layer of amplitude proportion with the first layer, described default Amplitude proportion is：<mrow> <msub> <mi>r</mi> <mi>i</mi> </msub> <mo>=</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mn>2</mn> <mo>&CenterDot;</mo> <mi>i</mi> <mo>-</mo> <mn>3</mn> </mrow> <msup> <mn>2</mn> <mi>i</mi> </msup> </mfrac> <mi>&pi;</mi> <mo>)</mo> </mrow> <mo>-</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <mo>(</mo> <mrow> <mfrac> <mrow> <mn>2</mn> <mo>&CenterDot;</mo> <mi>i</mi> <mo>-</mo> <mn>3</mn> </mrow> <msup> <mn>2</mn> <mi>i</mi> </msup> </mfrac> <mo>+</mo> <mfrac> <mn>1</mn> <mn>4</mn> </mfrac> </mrow> <mo>)</mo> <mi>&pi;</mi> <mo>)</mo> </mrow> <mo>;</mo> </mrow>Wherein, i be figure layer sequence number, riAmplitude proportion for i-th layer with the first layer.
- A kind of 7. digital signal modulated device, it is characterised in that including：Broadcast message sending module, for sending broadcast message to receiving terminal, and receive the receiving terminal and believed according to the broadcast Cease the Power Dynamic Range returned or call the number of plies；Signal acquisition module, for obtaining data signal to be modulated, plurality of information resources number is obtained according to the data signal to be modulated According to；Information source data order module, will for the transmission rate according to corresponding to the default corresponding relation acquisition information source data Ask, the information source data using the minimum information source data of transmission rate request in the information source data as limit priority, according to described The height of the transmission rate request of information source data carries out priority ranking to the information source data；Control data mapping block, for generating control data according to the Power Dynamic Range or the calling number of plies, by institute State control data and be mapped to the outermost layer away from central point in default planisphere；Figure layer chooses module, for using the outermost layer as first layer, according to the central point for moving closer to the default planisphere Direction, successively from the default planisphere choose with it is described calling number of plies equal amount figure layer selected figure layer；Information source data mapping module, for being originated from the second layer for having selected figure layer, according to the priority of the information source data From it is high toward it is low, successively by different information source data from outer layer toward internal layer be mapped to corresponding to selected figure layer；Multilayer modulation module, for having selected the modulation system of figure layer according to the default planisphere acquisition, it is respectively adopted each The modulation system of figure layer has been selected to be modulated to obtain to the control data or information source data that are mapped to corresponding diagram layer and respectively selected figure layer Modulated signal, according to respectively having selected the modulated signal of figure layer to generate modulated data signal and sent to the receiving terminal.
- 8. digital signal modulated device according to claim 7, it is characterised in that the default planisphere is circular constellations Figure, modulation system corresponding to i-th layer of the default planisphere are 2i+1PSK or 4iPSK, and the interlayer of i-th layer and i+1 layer The phase angle staggered isOr
- A kind of 9. digital demodulation signal device, it is characterised in that including：Broadcast message responder module, the broadcast message sent for receiving end/sending end, and power is returned to according to the broadcast message Dynamic range calls the number of plies to the transmitting terminal；First layer modulated signal acquisition module, the modulated data signal sent for receiving the transmitting terminal, and described in acquisition The peak power of data signal is adjusted, maximum amplitude is obtained according to the peak power, and with the central point away from default planisphere Outermost layer be first layer, chosen according to the maximum amplitude from the modulated data signal first layer modulation letter Number；First layer demodulation module, for obtaining the modulation system of the first layer according to the default planisphere, and according to described The modulation system of first layer is demodulated to described most one layer of modulated signal, obtains control data；Multilayer modulated signal acquisition module, for obtaining the calling number of plies according to the control data, according to moving closer to State the direction of the central point of default planisphere, chosen and the figure layer for calling number of plies equal amount from the default planisphere Figure layer has been selected, and has been obtained according to the maximum amplitude and default amplitude proportion from the modulated data signal except described Modulated signal corresponding to figure layer has been selected outside first layer；Most last layer determining module, for having selected first layer described in distance is farthest in figure layer figure layer as most last layer using described；Bit error rate acquisition module, obtained for obtaining the current error rate of the most last layer, and according to the Power Dynamic Range Take current acceptable ranges；Bit error rate detection module, for judging the current error rate whether in the current acceptable ranges；Multilayer demodulation module, for when the current error rate is in the current acceptable ranges, according to the default star Seat figure obtains the modulation system for having selected figure layer in addition to the first layer, and the figure layer of having selected in addition to the first layer is respectively adopted The modulated signal of corresponding figure layer is demodulated to obtain corresponding information source data by modulation system, is generated and solved according to the information source data Adjust signal；Most last layer update module, for when the current error rate is not in the current acceptable ranges, with away from described The direction of the central point of default planisphere is direction outward, using the most last layer outward one layer of figure layer as most last layer newly, And the current error rate of most last layer described in the bit error rate acquisition module reacquisition is controlled, and according to the power dynamic model Enclose acquisition current acceptable ranges.
- 10. digital demodulation signal device according to claim 9, it is characterised in that the default planisphere is circular star Seat figure, modulation system corresponding to i-th layer of the default planisphere are 2i+1PSK or 4iPSK, and the layer of i-th layer and i+1 layer Between the phase angle of phase shifting beOr
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