CN105991503A - Method and device for signal transmission - Google Patents
Method and device for signal transmission Download PDFInfo
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- CN105991503A CN105991503A CN201510077259.0A CN201510077259A CN105991503A CN 105991503 A CN105991503 A CN 105991503A CN 201510077259 A CN201510077259 A CN 201510077259A CN 105991503 A CN105991503 A CN 105991503A
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- user terminal
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Abstract
The invention provides a signal transmission method, which is applied to a base station in a 4G or 5G system. The method comprises steps: when the base station needs to send signals to paired users, a configured 2<N+M>-order QAM constellation diagram is used for modulating the signals and sending the signals via a channel, and thus, a user terminal uses the constellation diagram notified by the base station to demodulate the received signals; and when the user terminal is a high-signal-to-noise ratio user terminal, according to the information bit number of the high-signal-to-noise ratio user terminal in the signals and the positions of the information bits in the information bit combination, signals sent to the user terminal are separated. Based on the same inventive concept, the invention also provides a signal transmission device, thereby effectively enhancing the system user connection supporting ability and the system performance.
Description
Technical field
The present invention relates to communication technical field, particularly to a kind of data transmission method and device.
Background technology
Traditional Long Term Evolution (Long Term Evolution, LTE) system uses OFDM and adjusts
System, it is the basic thought design based on linear receiver and orthogonal transmission, and this design philosophy is main
Allow for receiver design simple, it is easy to accomplish, meanwhile, performance also can be guaranteed.
But, with developing rapidly that mobile Internet business and internet of things service are applied, future 5G pair
Power system capacity, user rate, connects the index such as number and is proposed very high request, and traditional orthogonal design is thought
Think increasingly to show its limitation, and non-orthogonal techniques is by same transmitted over resources different user
Information, can effectively promote systematic function, support that more user connects, gradually cause the pass of industry
Note.
Non orthogonal transmissions technology mainly includes power domain stacking method, code domain stacking method, spatial domain superposition side
Methods etc., these schemes are all by actively introducing inter-user interference at transmitting terminal, by the information of different user
Superposed transmission in same resource, utilizes adjustment at the complicated receivers such as SIC or MPA at receiving terminal
Method realizes that interference eliminates, and utilizes the lifting of Receiver Complexity to exchange system performance gain for.
Content of the invention
In view of this, the application provides a kind of data transmission method and device, connects to promote system user
Tenability and systematic function.
For solving above-mentioned technical problem, the technical scheme of the application is achieved in that
A kind of method for transmitting signals, is applied on the base station in 4G or 5G system, and the method includes:
Signal to noise ratio difference is more than two user terminals of predetermined threshold value as pairing user, configuration by base station
2N+MRank QAM constellation and 2NRank QAM constellation, and notify the user terminal of high s/n ratio by joining
2 puttingN+MRank QAM constellation is demodulated, and the user terminal of low signal-to-noise ratio passes through 2NRank qam constellation
Figure is demodulated；Wherein, N is the information bit digit of the low user terminal transmission of signal to noise ratio, and M is noise
The ratio information bit digit of high user terminal transmission, described 2N+MRank QAM constellation is 2NRank QAM
Each constellation point in planisphere expands to 2MThe planisphere of composition after individual constellation point；The combination of described information bit
Front N-bit is the information bit of the user terminal of low signal-to-noise ratio；
This base station needs, when the described pairing corresponding user terminal of user sends signal, to use the 2 of configurationN+M
Rank QAM constellation modulated signal is simultaneously sent by channel, makes user terminal use the planisphere that this base station notifies
The signal that demodulation receives；If the user terminal that this user terminal is high s/n ratio, then according to letter high in signal
The position made an uproar in the ratio information bit digit of user terminal, and the combination of information bit place information bit separates
Go out to be sent to the signal of this user terminal.
A kind of signal transmitting apparatus, is applied in the base station in 4G or 5G system, and this device includes: configuration
Unit, modulating unit and transmitting element；
Described dispensing unit, for being more than two user terminals of predetermined threshold value as pairing using signal to noise ratio difference
User, configures 2N+MRank QAM constellation and 2NRank QAM constellation, wherein, N is that signal to noise ratio is low
The information bit digit of user terminal transmission, M is the information bit digit of the high user terminal transmission of signal to noise ratio,
Described 2N+MRank QAM constellation is 2NEach constellation point in the QAM constellation of rank expands to 2MIndividual constellation point
The planisphere of rear composition；The front N-bit of described information bit combination is the information of the user terminal of low signal-to-noise ratio
Bit；
Described modulating unit, is used for needing, when the described pairing corresponding user terminal of user sends signal, to use
The 2 of configurationN+MRank QAM constellation modulated signal；
Described transmitting element, the user terminal for notifying high s/n ratio is configured by described dispensing unit
2N+MRank QAM constellation is demodulated, and the user terminal of low signal-to-noise ratio passes through 2NRank QAM constellation enters
Row demodulation；Sent by channel for the signal after described modulating unit is modulated, make user terminal use this
The planisphere of base station notice demodulates the signal receiving；If the user terminal that this user terminal is high s/n ratio,
The then information bit digit according to high s/n ratio user terminal in signal, and information bit place information bit
The signal being sent to this user terminal is isolated in position in combination.
From technical scheme above, in the application, base station is by the user of high s/n ratio and low signal-to-noise ratio eventually
End is as pairing user, and on the basis of bit field superposition, it is excellent that base station utilizes that bit maps with planisphere
Change design, at the signal of same symbol internal modulation low signal-to-noise ratio and the user terminal of high s/n ratio, make difference
The data of user terminal are transmitted in same symbol, the simple and effective signal realizing different user terminals
Modulation and demodulation, can effectively promote system user and connect tenability and systematic function.
Brief description
Fig. 1 is the QPSK planisphere in the embodiment of the present application for user terminal 1 configuration；
Fig. 2 is 2 of configuration in the embodiment of the present application4Rank QAM constellation schematic diagram；
Fig. 3 is method for transmitting signals schematic flow sheet in the embodiment of the present application；
Fig. 4 is the structural representation of the device being applied to above-mentioned technology in the embodiment of the present application.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawings simultaneously
For embodiment, technical scheme is described in detail.
Proposing a kind of method for transmitting signals in the embodiment of the present application, base station is by the user of high s/n ratio and low signal-to-noise ratio
Terminal is as pairing user, and on the basis of bit field superposition, base station utilizes bit to set with the optimization of planisphere
Meter, at the signal of same symbol internal modulation low signal-to-noise ratio and the user terminal of high s/n ratio, makes different user eventually
The data of end are transmitted in same symbol, and the modulation of the simple and effective signal realizing different user terminals is conciliate
Adjust, can effectively promote system user and connect tenability and systematic function.
In order to realize the application, base station need to be done and be configured as follows:
Signal to noise ratio difference is more than two user terminals of predetermined threshold value as pairing user by base station.Wherein, in advance
If threshold value applies configuration according to reality.
This base station configuration 2N+MRank quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM)
Planisphere and 2NRank QAM constellation, and notify the user terminal of high s/n ratio by configure 2N+MRank
QAM constellation is demodulated, and the user terminal of low signal-to-noise ratio passes through 2NRank QAM constellation is demodulated；
Wherein, N is the information bit digit of the low user terminal transmission of signal to noise ratio, and M is that the user that signal to noise ratio is high is whole
The information bit digit of end transmission, described 2N+MRank QAM constellation is 2NEach in the QAM constellation of rank
Constellation point expands to 2MThe planisphere of composition after individual constellation point；The front N-bit of described information bit combination is low
The information bit of the user terminal of signal to noise ratio.
For ensureing the fairness of user in whole LTE system, described 2NArbitrary constellation point in the planisphere of rank expands
The 2 of exhibitionMIndividual constellation point is identical to the distance of this constellation point in this QPSK planisphere；The 2 of extensionMIndividual star
The top n bit of seat point is identical, and is described 2NThe constellation point for extension in the planisphere of rank；2N+M
In the QAM constellation of rank, the distance between each adjacent two constellation point is identical.
When implementing, N and M can be identical, it is also possible to different, N can be more than M, it is also possible to little
In M, implementing of the application does not limit.
The concrete configuration process of the planisphere of concrete example explanation below:
As using signal to noise ratio difference more than the user terminal 1 of predetermined threshold value and user terminal 2 as configuration user,
And user terminal 1 is low signal-to-noise ratio user terminal, user terminal 2 is high s/n ratio user terminal.
Assuming that N is 2, M is 2, i.e. in disposable transmission, and user terminal 1 accounts in information bit combination
2 bits, user terminal 2 accounts for 2 bits in information bit combination.
Seeing Fig. 1, Fig. 1 is the QPSK planisphere in the embodiment of the present application for user terminal 1 configuration, i.e.
22Rank QAM constellation.Fig. 1 includes 4 constellation point, disclosure satisfy that in user terminal once transmits
The be possible to situation of two bits.
The information bit combination configuration 2 transmitted for user terminal 1 and user terminal 22+2Rank QAM constellation,
I.e. 24Rank QAM constellation, 24Rank QAM constellation is each constellation point extension 2 in QPSK planisphere2
The planisphere of composition after individual constellation point, front 2 bits of described information bit combination are that the user of low signal-to-noise ratio is whole
The information bit of end.
As a example by the constellation point (00) in Fig. 1, its 4 constellation point of extension are respectively (0000), (0001),
(0010) 4 constellation point behind, (0011), and extension are to the distance of the constellation point (00) for extension
Identical；Each constellation point in Fig. 1 is all extended in like fashion, then by 4 some extensions 16 in Fig. 1
Individual, 16 some compositions 2 of extension4Rank QAM constellation, 2416 constellations in the QAM constellation of rank
Point is evenly distributed in planisphere, and the positional distance of i.e. each adjacent constellation point is all identical.
Seeing Fig. 2, Fig. 2 is 2 of configuration in the embodiment of the present application4Rank QAM constellation schematic diagram.In Fig. 2,
The first two bit of each constellation point is used for 2 bits of map user terminal 1, latter two bit
The bit of family map user terminal 2；24In the QAM constellation of rank, the distance between each adjacent node is identical.
When N is 2, and M is 4, one of QPSK planisphere constellation point extension 24Individual constellation point, with
Above-mentioned generation 24The process of rank QAM constellation is similar to generation 26Rank planisphere, is not detailed herein.
This base station notice high s/n ratio user terminal by configure 2N+MRank QAM constellation is demodulated,
The user terminal of low signal-to-noise ratio passes through 2NRank QAM constellation is demodulated, and implements and can be:
This base station first two planispheres by configuration are all sent to two user terminals of pairing, then by sending star
Seat map logo notifies the planisphere that each user terminal uses, as used 1 mark to use high-order constellation figure (2N+M
Rank QAM constellation), use 0 mark to use low order planisphere (2NRank QAM constellation).
If the user terminal of pairing is user terminal 1 exemplified above and user terminal 2, then notify user eventually
End 1 use low order planisphere demodulates the signal receiving；Notice user terminal 2 uses high-order constellation figure to demodulate
The signal receiving.
Due between the constellation point in low-order-modulated planisphere, there is bigger Euclidean distance, therefore, it can for
User profile demodulation to low signal-to-noise ratio user terminal.
Seeing Fig. 3, Fig. 3 is method for transmitting signals schematic flow sheet in the embodiment of the present application.Concretely comprise the following steps:
Step 301, base station needs, when the described pairing corresponding user terminal of user sends signal, to use configuration
2N+MRank QAM constellation modulated signal.
Step 302, the signal after this base station will be modulated is sent by channel, makes user terminal use this base station to lead to
The planisphere known demodulates the signal receiving；If the user terminal that this user terminal is high s/n ratio, then basis
In the information bit digit of high s/n ratio user terminal in signal, and the combination of information bit place information bit
Position isolate the signal being sent to this user terminal.
When the user terminal of low signal-to-noise ratio receives the signal that base station sends, use the low order star of base station notice
The signal that seat figure demodulation receives.According to the planisphere in Fig. 2, in each quadrant, user is eventually
The information bit position of end 1 is identical, therefore, for still can being equivalent to for user terminal 1 make
With the modulation of QPSK planisphere.
When the user terminal of high s/n ratio receives the signal that base station sends, use the high-order of base station notice
QAM constellation demodulates the signal receiving, and as shown in Figure 2, the signal demodulating both had included user eventually
Hold 1 corresponding information bit position, also include user terminal 2 corresponding information bit position.This user terminal
Digit (2) in the bit combination of disposable transmission for the bit according to this user terminal, and than
Position (latter 2) in special combination, will send the Signal separator of user terminal 2 out.
The embodiment of the present application is transmitted in same resource the information of difference pairing user simultaneously, improves frequency
Spectrum efficiency, can support more number of users, map and pairing the bit of constellation point cleverly meanwhile
The signal to noise ratio condition of user combines, and makes low signal-to-noise ratio user achieve more robust by low order demodulation
Information is transmitted, and high s/n ratio user is separated by higher-order solutions reconciled data and also can effectively realize self
The demodulation of data, this method is possible not only to effectively promote the performance of whole system, and also ensure that whole
The fairness of user in individual system.
Based on same inventive concept, the application also proposes a kind of signal transmitting apparatus, is applied to 4G or 5G
In base station in system.Seeing Fig. 4, Fig. 4 is the knot of the device being applied to above-mentioned technology in the embodiment of the present application
Structure schematic diagram.This device includes: dispensing unit the 401st, modulating unit 402 and transmitting element 403；
Dispensing unit 401, for being more than two user terminals of predetermined threshold value as pairing using signal to noise ratio difference
User, configures 2N+MRank quadrature amplitude modulation QAM constellation and 2NRank QAM constellation, wherein, N
The information bit digit transmitted for the low user terminal of signal to noise ratio, M is the high user terminal transmission of signal to noise ratio
Information bit digit, described 2N+MRank QAM constellation is 2NEach constellation point in the QAM constellation of rank expands
Exhibition is to 2MThe planisphere of composition after individual constellation point；The front N-bit of described information bit combination is low signal-to-noise ratio
The information bit of user terminal；
Modulating unit 402, is used for needing, when the described pairing corresponding user terminal of user sends signal, to use
The 2 of configurationN+MRank QAM constellation modulated signal；
Transmitting element 403, is used for notifying 2 that the user terminal of high s/n ratio is configured by dispensing unit 401N+M
Rank QAM constellation is demodulated, and the user terminal of low signal-to-noise ratio passes through 2NRank QAM constellation solves
Adjust；Sent by channel for the signal after modulating unit 402 is modulated, make user terminal use this base station
The planisphere of notice demodulates the signal receiving；If the user terminal that this user terminal is high s/n ratio, then root
The information bit digit of high s/n ratio user terminal in the number of it is believed that, and the combination of information bit place information bit
In position isolate the signal being sent to this user terminal.
It is also preferred that the left described 2N2 of arbitrary constellation point extension in the QAM constellation of rankMIndividual constellation point is to this
The distance of this constellation point in QPSK planisphere is identical；
Described 2N+MIn the QAM constellation of rank, the distance between each adjacent two constellation point is identical.
The unit of above-described embodiment can be integrated in one, it is also possible to separates and disposes；One can be merged into
Unit, it is also possible to be further split into multiple subelement.
In sum, the application passes through base station using the user terminal of high s/n ratio and low signal-to-noise ratio as pairing
User, on the basis of bit field superposition, base station utilizes the optimization design of bit and planisphere, same
The signal of the user terminal of symbol internal modulation low signal-to-noise ratio and high s/n ratio, makes the data of different user terminals
Transmit in same symbol, the modulation and demodulation of the simple and effective signal realizing different user terminals, energy
Enough system users that effectively promotes connect tenability and systematic function.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement etc. done, should be included in
Within the scope of protection of the invention.
Claims (4)
1. a method for transmitting signals, is applied on the base station in 4G or 5G system, it is characterised in that should
Method includes:
Signal to noise ratio difference is more than two user terminals of predetermined threshold value as pairing user, configuration by base station
2N+MRank quadrature amplitude modulation QAM constellation and 2NRank QAM constellation, and notify the use of high s/n ratio
Family terminal by configure 2N+MRank QAM constellation is demodulated, and the user terminal of low signal-to-noise ratio passes through 2N
Rank QAM constellation is demodulated；Wherein, N is the information bit digit of the low user terminal transmission of signal to noise ratio,
M is the information bit digit of the high user terminal transmission of signal to noise ratio, described 2N+MRank QAM constellation is 2N
Each constellation point in the QAM constellation of rank expands to 2MThe planisphere of composition after individual constellation point；Described information ratio
The front N-bit of special combination is the information bit of the user terminal of low signal-to-noise ratio；
This base station needs, when the described pairing corresponding user terminal of user sends signal, to use the 2 of configurationN+M
Rank QAM constellation modulated signal is simultaneously sent by channel, makes user terminal use the planisphere that this base station notifies
The signal that demodulation receives；If the user terminal that this user terminal is high s/n ratio, then according to letter high in signal
The position made an uproar in the ratio information bit digit of user terminal, and the combination of information bit place information bit separates
Go out to be sent to the signal of this user terminal.
2. method according to claim 1, it is characterised in that described 2NIn the QAM constellation of rank
The 2 of arbitrary constellation point extensionMIndividual constellation point to this 2NThe distance phase of this constellation point in the QAM constellation of rank
With；
2N+MIn the QAM constellation of rank, the distance between each adjacent two constellation point is identical.
3. a signal transmitting apparatus, is applied in the base station in 4G or 5G system, it is characterised in that should
Device includes: dispensing unit, modulating unit and transmitting element；
Described dispensing unit, for being more than two user terminals of predetermined threshold value as pairing using signal to noise ratio difference
User, configures 2N+MRank quadrature amplitude modulation QAM constellation and 2NRank QAM constellation, wherein, N
The information bit digit transmitted for the low user terminal of signal to noise ratio, M is the high user terminal transmission of signal to noise ratio
Information bit digit, described 2N+MRank QAM constellation is 2NEach constellation point in the QAM constellation of rank expands
Exhibition is to 2MThe planisphere of composition after individual constellation point；The front N-bit of described information bit combination is low signal-to-noise ratio
The information bit of user terminal；
Described modulating unit, is used for needing, when the described pairing corresponding user terminal of user sends signal, to use
The 2 of configurationN+MRank QAM constellation modulated signal；
Described transmitting element, the user terminal for notifying high s/n ratio is configured by described dispensing unit
2N+MRank QAM constellation is demodulated, and the user terminal of low signal-to-noise ratio passes through 2NRank QAM constellation enters
Row demodulation；Sent by channel for the signal after described modulating unit is modulated, make user terminal use this
The planisphere of base station notice demodulates the signal receiving；If the user terminal that this user terminal is high s/n ratio,
The then information bit digit according to high s/n ratio user terminal in signal, and information bit place information bit
The signal being sent to this user terminal is isolated in position in combination.
4. device according to claim 3, it is characterised in that
Described 2N2 of arbitrary constellation point extension in the QAM constellation of rankMIndividual constellation point is to this QPSK constellation
The distance of this constellation point in figure is identical；
Described 2N+MIn the QAM constellation of rank, the distance between each adjacent two constellation point is identical.
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| CN201510077259.0A CN105991503B (en) | 2015-02-13 | 2015-02-13 | A kind of method for transmitting signals and device |
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| CN201510077259.0A CN105991503B (en) | 2015-02-13 | 2015-02-13 | A kind of method for transmitting signals and device |
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| CN105991503B (en) | 2019-03-29 |
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Effective date of registration: 20211223 Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF INFORMATION AND COMMUNICATIONS Address before: 100191 No. 52 Garden North Road, Beijing, Haidian District Patentee before: CHINA ACADEME OF TELECOMMUNICATION RESEARCH OF MIIT |