CN108964681A - The method and apparatus that non-centrosymmetry is modulated in communication system - Google Patents
The method and apparatus that non-centrosymmetry is modulated in communication system Download PDFInfo
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Abstract
The present invention relates to the method and apparatus that non-centrosymmetry in a kind of communication system is modulated, this method the specific steps are signal transmitter carries out serial to parallel conversion to the data flow of input first, separates multiple parallel binary sequences；Then 2 level are done respectively to multiple parallel binary sequences to convert to L level, form multiple parallel L level signals；Then subcarrier and the multiplication of a kind of phase are selected respectively for multiple parallel L level signals；Then all parallel subcarriers be added and obtain non-centrosymmetry modulated signal.The present invention realizes the non-centrosymmetry distribution of modulated signal, solves the problems, such as that the uniformity of superposed signal in existing associated communication system leads to be difficult to demodulate every layer signal in superposed signal respectively, breaks through the bottleneck of modulating performance difference in existing communication system.
Description
Technical field
The invention belongs to fields of communication technology, and in particular to the method and dress of non-centrosymmetry modulation in a kind of communication system
It sets.
Background technique
Along with the evolution of information age, either wireline communication network or cordless communication network, all held in excess load
Carry rigid demand of the mankind to information exchange.How the traffic demands of explosive growth are solved, it has also become current
The thorny problem of Global Academy and industry.
In order to solve this serious problem, scientific research personnel and mechanism start to explore from different dimensions and excavate frequency spectrum resource,
For improving the transmittability of existing communication network, it is more to propose non-orthogonal multiple access, function point multiplexing and orthogonal function point multiplexing
The technologies such as location access.These technologies need that multiple modulated signals are overlapped processing in transmitting terminal or receiving end；It is receiving
When the demodulation of end, the multilayer signal being superimposed is demodulated using counteracting serial interference technology or multiple domain Technology of Judgment.
In existing signal modulation scheme, the constellation point of modulated signal be on planisphere it is well-regulated be uniformly distributed, determine folded
Plus signal is still uniform.So that system is difficult to demodulate every layer signal in superposed signal respectively, the demodulation of receiving end is caused to face
Serious bit error rate problem.Therefore, the transmission performance of this kind of system is seriously constrained.
Summary of the invention
It is difficult to demodulate every layer signal in superposed signal respectively to solve system existing in the prior art, causes serious
Bit error rate the technical issues of, the present invention provides following technical schemes:
A kind of method of non-centrosymmetry modulation in communication system, comprising the following steps:
Step 1 carries out serial to parallel conversion to the data flow of input, separates multiple parallel binary sequences；
Step 2 does 2 level to multiple parallel binary sequences to L level transformation respectively, forms multiple parallel L electricity
Ordinary mail number；
Step 3, subcarrier and the multiplication for selecting a kind of phase respectively for multiple parallel L level signals；
Step 4 is added all parallel subcarriers, obtains non-centrosymmetry modulated signal；
Wherein, the frequency of multiple subcarriers corresponding to multiple parallel L level signals is all identical.
As a further explanation of the present invention, the specific method of multiple parallel binary sequences is separated in the step 1
Are as follows: the data flow of input is divided into the identical multiple parallel binary sequences of rate, the rate of plurality of binary sequence
With the rate for being equal to input data.
As a further explanation of the present invention, 2 level are done respectively to multiple parallel binary sequences in the step 2 to arrive
L level transformation method particularly includes: the mapping table for establishing data and carrier amplitude in parallel binary sequence, by tabling look-up
It selects matched level and the level of binary sequence signal is adjusted；
It is the subcarrier that multiple parallel L level signals select a kind of phase respectively in the step 3 method particularly includes:
The mapping table for establishing data and sub-carrier phase in parallel binary sequence has the son of matched-phase by selection of tabling look-up
Carrier wave.
As a further explanation of the present invention, the method for establishing mapping table, specifically: building planisphere；If
Set the mapping relations of bit and constellation point；According to the mapping of bit and the phase production data and carrier phase that are mapped constellation point
Relation table；According to the mapping table of bit and the amplitude production data and L level that are mapped constellation point.
As a further explanation of the present invention, the method for the building planisphere specifically: building signal constellation point processed
Set
Wherein, (x, y) and Z respectively indicate coordinate and integer set of the constellation point on planisphere；Selection and order of modulation
Constellation point of the matched constellation point as modulated signal.
The device of non-centrosymmetry modulation in a kind of communication system, which is characterized in that including serial to parallel conversion module, go here and there and become
It is connected with electric level conversion modular on mold changing block, carrier generator module, carrier generator module are connected on electric level conversion modular
On be connected with adduction module；Wherein:
Serial to parallel conversion module: serial to parallel conversion is carried out to the data flow of input, separates multiple parallel binary sequences；
Electric level conversion modular: 2 level are done to multiple parallel binary sequences respectively and are converted to L level, formation is multiple simultaneously
Capable L level signal；
Carrier generator module: a kind of subcarrier of phase is selected and generated simultaneously respectively for multiple parallel L level signals
It is multiplied；
Adduction module: being added all parallel subcarriers, obtains non-centrosymmetry modulated signal.
As a further explanation of the present invention, to separate multiple parallel binary sequences in the serial to parallel conversion module specific
Are as follows: the data flow of input is divided into the identical multiple parallel binary sequences of rate, the rate of plurality of binary sequence
With the rate for being equal to input data.
As a further explanation of the present invention, multiple parallel binary sequences are done respectively in the electric level conversion modular
2 level are converted to L level specifically: the mapping table for establishing data and carrier amplitude in parallel binary sequence, by looking into
Table selects matched level and is adjusted to the level of binary sequence signal；
It is that multiple parallel L level signals select a kind of subcarrier of phase specific respectively in the carrier generator module
Are as follows: the mapping table for establishing data and sub-carrier phase in parallel binary sequence has matched-phase by selection of tabling look-up
Subcarrier.
As a further explanation of the present invention, described to establish mapping table specifically: building planisphere；Be arranged bit with
The mapping relations of constellation point；According to the mapping table of bit and the phase production data and carrier phase that are mapped constellation point；
According to the mapping table of bit and the amplitude production data and L level that are mapped constellation point.
As a further explanation of the present invention, the building planisphere specifically: building modulated signal constellation point sets
Wherein, (x, y) and Z respectively indicate coordinate and integer set of the constellation point on planisphere；Selection and order of modulation
Constellation point of the matched constellation point as modulated signal.
Compared with prior art, what the present invention obtained has the beneficial effect that
1, the present invention is by carrying out serial to parallel conversion to the data flow of input in signal transmitter, separate multiple parallel two into
Sequence processed, and 2 level are done to multiple parallel binary sequences respectively and are converted to L level, form multiple parallel L level letters
Number, then subcarrier and the multiplication of a kind of phase are selected for multiple parallel L level signals respectively, then all parallel sons are carried
Wave, which be added, obtains modulated signal, realizes the non-centrosymmetry distribution of modulated signal, solves to fold in existing associated communication system
The uniformity of plus signal causes to be difficult the problem of demodulating every layer signal in superposed signal respectively, breaks through in existing communication system and adjusts
The bottleneck of performance difference processed.
2, apparatus of the present invention by serial to parallel conversion module the data flow of input carry out serial to parallel conversion separate it is multiple parallel
Binary sequence, by electric level conversion modular to multiple parallel binary sequences do respectively 2 level convert to L level to be formed it is more
A parallel L level signal is that multiple parallel L level signals select and generate respectively a kind of phase by carrier generator module
The subcarrier and multiplication, adduction module of position carry out all parallel subcarriers to be added acquisition non-centrosymmetry modulated signal, in fact
It is tired to solve the demodulation of the signal caused by superposed signal is uniformly distributed in existing communication system for the non-centrosymmetry modulation of existing signal
Difficult problem breaks through the bottleneck of modulating performance difference in existing communication system.
The present invention is described in further details below with reference to accompanying drawings and embodiments.
Detailed description of the invention
Fig. 1 is the method flow diagram that non-centrosymmetry is modulated in communication system of the invention；
Fig. 2 is schematic diagram of the present invention to modulated signal constellation building；
Fig. 3 is the structure drawing of device of non-centrosymmetry modulation in communication system of the invention.
Specific embodiment
Reach the technical means and efficacy that predetermined purpose is taken for the present invention is further explained, below in conjunction with attached drawing and reality
Example is applied to a specific embodiment of the invention, structure feature and its effect, detailed description are as follows.
Embodiment 1:
Cause to be difficult to demodulate in superposed signal respectively to solve the uniformity of superposed signal in existing associated communication system
The technical issues of every layer signal, the present embodiment provides the methods that non-centrosymmetry in a kind of communication system is modulated, as shown in Figure 1,
Specific step is as follows for this method:
S101 carries out serial to parallel conversion to the data flow of input, separates multiple parallel binary sequences；
Separate multiple parallel binary sequences method particularly includes: it is identical multiple that the data flow of input is divided into rate
Parallel binary sequence, the rate of plurality of binary sequence and the rate equal to input data；
Below by taking a single system as an example, serial to parallel conversion is carried out to the data flow of input, separate multiple parallel two into
The method of sequence processed is described in detail.
Assuming that the input traffic of system is b0b1b2b3b4b5b6b7And b0, b1, b2, b3, b4, b5, b6, b7∈ { 0,1 }, number
It is c according to the processing speed that stream requires.
Input data is divided into two parallel binary sequences, respectively indicated by the present embodiment according to the state of system
b0b2b4b6And b1b3b5b7, and the rate that the two parallel binary sequences are arranged is c/2.
Similarly, for separating more than two parallel binary sequence the case where, also there is similar method.
S102 does 2 level to multiple parallel binary sequences respectively and converts to L level, forms multiple parallel L levels
Signal；
What 2 level were converted to L level is done respectively to multiple parallel binary sequences method particularly includes: establish parallel two into
The mapping table of data and carrier amplitude in sequence processed selects matched level and to binary sequence signal by tabling look-up
Level is adjusted；
The method for establishing mapping table, specifically: building planisphere；The mapping relations of bit and constellation point are set；Root
According to the mapping table of bit and the phase production data and carrier phase that are mapped constellation point；According to bit and it is mapped constellation
The mapping table of amplitude the production data and L level of point；
The method for constructing planisphere, specifically: building modulated signal constellation point sets Wherein x, y and Z respectively indicate constellation point
Coordinate and integer set on planisphere；It selects and constellation point of the matched constellation point of order of modulation as modulated signal；
Below by taking the single system in S101 as an example, 2 level are done to multiple parallel binary sequences respectively and are become to L level
It changes and is described in detail.
By taking two parallel binary sequences in S101 as an example, the order of modulation of system is 4.As shown in Fig. 2, this implementation
Example building modulated signal constellation point sets and select and the matched constellation point of order of modulation for I.e.
The mapping relations that bit and constellation point is arranged are10 → (- 1,
0) and 11 → (1,0), wherein → indicate mapping；According to bit and the phase for being mapped constellation point, data and carrier phase are made
Mapping table, specifically: b(1)b(2)=10 → { θ(1)=π, θ(2)=0 } and b(1)b(2)=11 → { θ(1)=0, θ(2)=0 },
Wherein b(1)And b(2)Respectively indicate the data from first and second binary sequences, θ(1)And θ(2)Respectively indicate first and
The phase of two subcarriers；According to bit and the amplitude for being mapped constellation point, the mapping table of data and L level, tool are made
Body are as follows:
b(1)b(2)=10 → { a(1)=1, a(2)=0 } and b(1)b(2)=11 → { a(1)=1, a(2)=0 }, wherein a(1)And a(2)It respectively indicates
First and second level values；
If b(1)=b0=0 and b(2)=b1=1, by table look-up select matched level for
Then the level of two parallel binary sequence signals is adjusted separately as 0 He
Similarly, for multiple parallel binary sequences the case where, also have to form the side of multiple parallel L level signals
Method.
S103 selects subcarrier and the multiplication of a kind of phase for multiple parallel L level signals respectively；
Wherein, the frequency of multiple subcarriers corresponding to multiple parallel L level signals is all identical；For multiple parallel L electricity
Ordinary mail number selects a kind of subcarrier of phase respectively method particularly includes: establishes data and subcarrier phase in parallel binary sequence
The mapping table of position has the subcarrier of matched-phase by selection of tabling look-up；
Below by taking the single system in S102 as an example, a kind of phase is selected respectively to for multiple parallel L level signals
Subcarrier and be multiplied be described in detail.
By taking two parallel binary sequences in S102 as an example, the present embodiment is according to the numbers of two parallel binary sequences
According to the subcarrier for selecting a kind of phase, if b(1)=b0=0 and b(2)=b1=1, by table look-up select matched phase forThe phase of so selected first and second subcarriers is respectively θ(1)=0 HeThen, two parallel L level signals respectively with first and second sub- carrier multiplications.
Similar, the case where for multiple parallel binary sequences, also promising multiple parallel L level signals select respectively
The method selecting a kind of subcarrier of phase and being multiplied.
S104 is added all parallel subcarriers, obtains non-centrosymmetry modulated signal.
The method that non-centrosymmetry is modulated in above-mentioned communication system, by being carried out in data flow of the signal transmitter to input
Serial to parallel conversion separates multiple parallel binary sequences, and does 2 level respectively to L level to multiple parallel binary sequences
Transformation forms multiple parallel L level signals, then selects a kind of subcarrier of phase respectively for multiple parallel L level signals
And be multiplied, then all parallel subcarriers are carried out to be added acquisition modulated signal, realize the non-centrosymmetry point of modulated signal
Cloth, the uniformity for solving superposed signal in existing associated communication system lead to be difficult to demodulate every layer signal in superposed signal respectively
The problem of, break through the bottleneck of modulating performance difference in existing communication system.
Embodiment 2:
On the basis of embodiment 1, the present embodiment provides the devices that non-centrosymmetry in a kind of communication system is modulated, and such as scheme
Shown in 3, comprising:
Serial to parallel conversion module: serial to parallel conversion is carried out to the data flow of input, separates multiple parallel binary sequences；
Electric level conversion modular: 2 level are done to multiple parallel binary sequences respectively and are converted to L level, formation is multiple simultaneously
Capable L level signal；
Carrier generator module: a kind of subcarrier of phase is selected and generated simultaneously respectively for multiple parallel L level signals
It is multiplied；
Adduction module: being added all parallel subcarriers, obtains non-centrosymmetry modulated signal.
In the present embodiment, serial to parallel conversion module 301 the data flow of input carry out serial to parallel conversion separate it is multiple parallel
Binary sequence, electric level conversion modular 302 to multiple parallel binary sequences do respectively 2 level convert to L level to be formed it is more
A parallel L level signal, carrier generator module 303 are that multiple parallel L level signals select and generate respectively a kind of phase
The subcarrier and multiplication, adduction module 304 of position carry out all parallel subcarriers to be added acquisition non-centrosymmetry modulated signal,
The non-centrosymmetry modulation for realizing signal, solves the demodulation of the signal caused by superposed signal is uniformly distributed in existing communication system
Difficult problem breaks through the bottleneck of modulating performance difference in existing communication system.
Wherein, multiple parallel binary sequences are separated in serial to parallel conversion module specifically: the data flow of input is divided into
The identical multiple parallel binary sequences of rate, the rate of plurality of binary sequence and the rate equal to input data.
Wherein, 2 level are done respectively to multiple parallel binary sequences in electric level conversion modular to convert specifically to L level
Are as follows: the mapping table for establishing data and carrier amplitude in parallel binary sequence selects matched level and right by tabling look-up
The level of binary sequence signal is adjusted；
It is the subcarrier that multiple parallel L level signals select a kind of phase respectively in carrier generator module specifically:
The mapping table for establishing data and sub-carrier phase in parallel binary sequence has the son of matched-phase by selection of tabling look-up
Carrier wave；
Establish mapping table specifically: building planisphere；The mapping relations of bit and constellation point are set；According to bit with
It is mapped the mapping table of phase the production data and carrier phase of constellation point；According to bit and the amplitude for being mapped constellation point
Make the mapping table of data and L level；
Construct planisphere specifically: building modulated signal constellation point sets Wherein (x, y)
Coordinate and integer set of the constellation point on planisphere are respectively indicated with Z；It selects with the matched constellation point of order of modulation as tune
The constellation point of signal processed.
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 used as an individual device and be independently arranged, can also be with
It is integrated in base station and mobile terminal device.
The device that non-centrosymmetry is modulated in above-mentioned communication system, serial to parallel conversion module 301 carry out the data flow of input
Serial to parallel conversion separates multiple parallel binary sequences, and serial to parallel conversion module 301 connects electric level conversion modular 302, level translation
Module 302 does 2 level to multiple parallel binary sequences respectively and converts to form multiple parallel L level signals to L level,
Electric level conversion modular 302 connects carrier generator module 303, and carrier generator module 303 is multiple parallel L level signals point
It does not select and the subcarrier for generating a kind of phase and is multiplied, the connection adduction module 304 of carrier generator module 303 sums it up module
304 all parallel subcarriers, which be added, obtains non-centrosymmetry modulated signal, realizes the non-centrosymmetry modulation of signal,
The demodulation of the signal caused by superposed signal is uniformly distributed difficult problem in existing communication system is solved, existing communication system is broken through
The bottleneck of middle modulating performance difference.
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 this understanding, this hair
Bright technical solution can be embodied in the form of software products, which can store in a non-volatile memory medium
In (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are used so that a computer equipment (can be individual
Computer, server, network equipment etc.) execute 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
Process 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, corresponding 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.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. the method that non-centrosymmetry is modulated in communication system, which comprises the following steps:
Step 1 carries out serial to parallel conversion to the data flow of input, separates multiple parallel binary sequences；
Step 2 does 2 level to multiple parallel binary sequences to L level transformation respectively, forms multiple parallel L levels letters
Number；
Step 3, subcarrier and the multiplication for selecting a kind of phase respectively for multiple parallel L level signals；
Step 4 is added all parallel subcarriers, obtains non-centrosymmetry modulated signal；
Wherein, the frequency of multiple subcarriers corresponding to multiple parallel L level signals is all identical.
2. the method that non-centrosymmetry is modulated in communication system according to claim 1, which is characterized in that the step 1
In separate multiple parallel binary sequences method particularly includes: it is identical multiple parallel that the data flow of input is divided into rate
Binary sequence, the rate of plurality of binary sequence and the rate equal to input data.
3. the method that non-centrosymmetry is modulated in communication system according to claim 1, which is characterized in that the step 2
In what 2 level were converted to L level is done respectively to multiple parallel binary sequences method particularly includes: establish parallel binary sequence
The mapping table of middle data and carrier amplitude, by table look-up select matched level and to the level of binary sequence signal into
Row adjustment；
It is the subcarrier that multiple parallel L level signals select a kind of phase respectively in the step 3 method particularly includes: establish
The mapping table of data and sub-carrier phase in parallel binary sequence by selection of tabling look-up there is the son of matched-phase to carry
Wave.
4. the method that non-centrosymmetry is modulated in communication system according to claim 3, which is characterized in that the foundation is reflected
The method for penetrating relation table, specifically: building planisphere；The mapping relations of bit and constellation point are set；According to bit be mapped
The mapping table of phase the production data and carrier phase of constellation point；Number is made with the amplitude for being mapped constellation point according to bit
According to the mapping table with L level.
5. the method that non-centrosymmetry is modulated in communication system according to claim 4, which is characterized in that the building
The method of planisphere specifically: building modulated signal constellation point sets
Wherein, (x, y) and Z respectively indicate coordinate and integer set of the constellation point on planisphere；Selection is matched with order of modulation
Constellation point of the constellation point as modulated signal.
6. the device that non-centrosymmetry is modulated in communication system, which is characterized in that including serial to parallel conversion module, serial to parallel conversion module
On be connected with electric level conversion modular, carrier generator module is connected on electric level conversion modular, is connected in carrier generator module
There is adduction module；Wherein:
Serial to parallel conversion module: serial to parallel conversion is carried out to the data flow of input, separates multiple parallel binary sequences；
Electric level conversion modular: 2 level are done to multiple parallel binary sequences respectively and are converted to L level, multiple parallel L are formed
Level signal；
Carrier generator module: it selects and the subcarrier for generating a kind of phase and is multiplied respectively for multiple parallel L level signals；
Adduction module: being added all parallel subcarriers, obtains non-centrosymmetry modulated signal.
7. the device that non-centrosymmetry is modulated in communication system according to claim 6, which is characterized in that the string simultaneously becomes
Multiple parallel binary sequences are separated in mold changing block specifically: it is identical multiple parallel that the data flow of input is divided into rate
Binary sequence, the rate of plurality of binary sequence and the rate equal to input data.
8. the device that non-centrosymmetry is modulated in communication system according to claim 6, which is characterized in that the level becomes
It does 2 level respectively to multiple parallel binary sequences in mold changing block to convert to L level specifically: establish parallel binary sequence
The mapping table of middle data and carrier amplitude, by table look-up select matched level and to the level of binary sequence signal into
Row adjustment；
It is the subcarrier that multiple parallel L level signals select a kind of phase respectively in the carrier generator module specifically:
The mapping table for establishing data and sub-carrier phase in parallel binary sequence has the son of matched-phase by selection of tabling look-up
Carrier wave.
9. the device that non-centrosymmetry is modulated in communication system according to claim 8, which is characterized in that the foundation is reflected
Penetrate relation table specifically: building planisphere；The mapping relations of bit and constellation point are set；According to bit and it is mapped constellation point
The mapping table of phase production data and carrier phase；According to bit and the amplitude production data and L electricity that are mapped constellation point
Flat mapping table.
10. the device that non-centrosymmetry is modulated in communication system according to claim 9, which is characterized in that the building
Planisphere specifically: building modulated signal constellation point sets
Wherein, (x, y) and Z respectively indicate coordinate and integer set of the constellation point on planisphere；Selection is matched with order of modulation
Constellation point of the constellation point as modulated signal.
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| CN105635022A (en) * | 2015-12-29 | 2016-06-01 | 中国科学院上海微系统与信息技术研究所 | Offset orthogonal multicarrier baseband system |
| CN106941470A (en) * | 2017-02-21 | 2017-07-11 | 东南大学 | A kind of method of signal peak-to-average ratio in reduction FBMC systems |
| CN108200001A (en) * | 2017-12-23 | 2018-06-22 | 陕西师范大学 | The method and apparatus that signal multilayer is modulated in communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022206464A1 (en) * | 2021-03-30 | 2022-10-06 | 华为技术有限公司 | Signal processing method and related device |
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