CN106656281A - Downlink multi-user superposition transmission method - Google Patents
Downlink multi-user superposition transmission method Download PDFInfo
- Publication number
- CN106656281A CN106656281A CN201510736285.XA CN201510736285A CN106656281A CN 106656281 A CN106656281 A CN 106656281A CN 201510736285 A CN201510736285 A CN 201510736285A CN 106656281 A CN106656281 A CN 106656281A
- Authority
- CN
- China
- Prior art keywords
- user
- bit
- modulation
- nearly
- remote user
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention provides a downlink multi-user superposition transmission method. The method comprises steps that matching user selection is carried out according to predetermined criteria, and matching users comprise a far user and a near user; modulation constellation flip for each code word bit stream of the near user after scrambling and before modulation mapping is carried out, and a modulation constellation after flip is employed for modulation mapping; symbolic data of the far user and the near user after modulation mapping respectively multiply with corresponding power splitting factors to acquire results which are superposed for layer mapping and precoding operation and then further through RE mapping to generate corresponding OFDM symbols, and radio frequency transmission of the corresponding OFDM symbols is carried out through corresponding antenna ports. The method is advantaged in that the composite constellation satisfying Gray mapping can be realized.
Description
Technical field
The present invention relates to LTE technologies, more particularly to a kind of descending multi-user superposed transmission method.
Background technology
In multi-user transmission scheme before LTE R13, by way of orthogonal transmission user is reduced
Between interference.But from information-theoretical angle analysis, orthogonal transmission is Erasure channel capacity, therefore is one
Plant the transmission means of suboptimum.If can combine from transmitter and receiver accounting for, even if emitter is using non-
Orthogonal transmission mode, can be obtained better than orthogonal biography in receiver side by some advanced signal processing algorithms
Defeated performance, it might even be possible to reach theoretic multi-user's capacity circle, further lift system performance.Wherein
One kind to be achieved in that and transmit (Superposition Transmission) using supercomposed coding.Its basic thought
It is that channel status is quantified as the grade of different channel qualities by system according to different target transmission speeds,
The target transmission speed of each channel quantitative grade one determination of correspondence.By two groups of signals respectively according to difference
Targeted rate independently carry out Channel Coding and Modulation mapping, then by both output constellations according to certain
Power sharing ratio be overlapped transmission.Corresponding receiver is using based on minimum mean square error criterion
(Minimum Mean Square Error, MMSE) Interference Cancellation (Interference Cancellation,
IC) receiver is obtained with approaching the performance of multiuser channel capacity.
The SI problems newly set up the project in 3GPP at present：Multi-user's superposed transmission (Multi-user Superposition
Transmission, MUST), it is devoted to studying application of multi-user's superposed transmission in LTE system,
To the descending multi-user transmission performance for further lifting LTE system.
In being currently based on the multi-user transmission scheme of supercomposed coding, the concrete reality of direct supercomposed coding is only gived
Existing scheme, and directly the compound constellation of the multi-user of supercomposed coding scheme output no longer meets Gray mappings, because
This can cause certain performance loss.And for the compound constellation for how realizing meeting Gray mappings is also being begged for
By in.
The content of the invention
For the problems referred to above, the present invention proposes a kind of descending multi-user superposed transmission method, including：
Carry out matching the selection of user according to predetermined criterion, the pairing user includes remote user and nearly user；
Each code word bits stream of the nearly user after scrambling, modulation mapping before be also modulated constellation
Upset, is then modulated mapping using the modulation constellation after upset；
The symbol data of the remote user and nearly user after modulation mapping be multiplied by corresponding power division because
Stacking up layer mapping and the pre-encode operation of carry out together after son, reflects through RE again after the precoding
Penetrate, generate and radio frequency transmission is carried out by corresponding antenna port after corresponding OFDM symbol.
Further, modulation system and modulation ratio of the mode of the modulation constellation upset according to the remote user
Spy determines.
Further, modulation system and modulation ratio of the mode of the modulation constellation upset according to the remote user
Spy determines to include：
The remote user is modulated using QPSK, and the modulation constellation of the nearly user is carried out following the next rules
Corresponding upset：
Further, also include：The nearly user is also adopted by QPSK modulation, then：
When the modulation bit of the remote user is 00, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 01, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 11, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 10, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
Further, also include：The nearly user is modulated using 16QAM, then：
When the modulation bit of the remote user is 00, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 01, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 11, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 10, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
Further, modulation system and modulation ratio of the mode of the modulation constellation upset according to the remote user
Spy determines to include：
The remote user is modulated using 16QAM, and the modulation constellation of the nearly user enters following the next rules
The corresponding upset of row：
Further, also include：The nearly user is modulated using QPSK, then：
When the modulation bit of the remote user is 0000 or 1101 or 0011 or 1111, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0100 or 1000 or 0111 or 1011, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0001 or 1101 or 0010 or 1110, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0101 or 1001 or 0110 or 1010, the nearly user
QPSK constellation points be with the corresponding relation of bit：
Further, also include：The nearly user is modulated using 16QAM, then：
When the modulation bit of the remote user is 0000 or 1101 or 0011 or 1111, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0100 or 1000 or 0111 or 1011, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0001 or 1101 or 0010 or 1110, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0101 or 1001 or 0110 or 1010, the nearly user
16QAM constellation points be with the corresponding relation of bit：
Further, the power splitting factor ensures that the modulation constellation of the nearly user is added to the remote use
Constellation overlap is not produced after in the constellation point at family.
Further, the span of the power splitting factor α includes：
Remote user and nearly user are modulated using QPSK simultaneously when, the span of the power splitting factor：
0<α≤0.5；
Remote user is modulated using QPSK, when nearly user is modulated using 16QAM, the power splitting factor
Span：0<α≤0.3571；
Remote user is modulated using 16QAM, when nearly user is modulated using QPSK, the power splitting factor
Span：0<α≤0.1227；
Remote user and nearly user are modulated using 16QAM simultaneously when, the power splitting factor span：
0<α≤0.1。
The present invention can realize meeting the compound constellation of Gray mappings.
Description of the drawings
Fig. 1 is that embodiment 1 is proposed based on two users' supercomposed coding flow process Fig. 1 of bit reversal；
Fig. 2 is that embodiment 1 is proposed based on two users' supercomposed coding flow process Fig. 2 of bit reversal；
Fig. 3 is that embodiment 1 is proposed based on two users' supercomposed coding flow process Fig. 3 of bit reversal；
Fig. 4 is the QPSK modulation constellations that remote user adopts in embodiment 2；
Fig. 5 is the far and near compound planisphere with two users' superposition when being modulated using QPSK per family in embodiment 2；
Fig. 6 is that far and near user is respectively adopted two users' superposition when QPSK and 16QAM is modulated in embodiment 2
Compound planisphere；
Fig. 7 is the 16QAM modulation constellations that remote user adopts in embodiment 3；
Fig. 8 is that far and near user is respectively adopted two users' superposition when 16QAM and QPSK is modulated in embodiment 3
Compound planisphere；
When distance using QPSK with being modulated per family when Fig. 9 is α for the power splitting factor that embodiment 4 is given
Compound constellation in each constellation point geometrical relationship schematic diagram；
Figure 10 embodiments 4 provide constellation and overlap schematic diagram.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention.
One embodiment of the present of invention proposes a kind of descending multi-user superposed transmission method, including：
Carry out matching the selection of user according to predetermined criterion, the pairing user includes remote user and nearly user；
Each code word bits stream of the nearly user after scrambling, modulation mapping before be also modulated constellation
Upset, is then modulated mapping using the modulation constellation after upset；
The symbol data of the remote user and nearly user after modulation mapping be multiplied by corresponding power division because
Stacking up layer mapping and the pre-encode operation of carry out together after son, reflects through RE again after the precoding
Penetrate, generate and radio frequency transmission is carried out by corresponding antenna port after corresponding OFDM symbol.
In one alternate embodiment, the mode of modulation constellation upset according to the modulation system of the remote user and
Modulation bit is determined.
In one alternate embodiment, modulation methods of the mode of the modulation constellation upset according to the remote user
Formula and modulation bit determine to include：
The remote user is modulated using QPSK, and the modulation constellation of the nearly user is carried out following the next rules
Corresponding upset：
In one alternate embodiment, also include：The nearly user is also adopted by QPSK modulation, then：
When the modulation bit of the remote user is 00, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 01, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 11, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 10, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
In one alternate embodiment, also include：The nearly user is modulated using 16QAM, then：
When the modulation bit of the remote user is 00, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 01, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 11, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 10, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
In one alternate embodiment, modulation methods of the mode of the modulation constellation upset according to the remote user
Formula and modulation bit determine to include：
The remote user is modulated using 16QAM, and the modulation constellation of the nearly user enters following the next rules
The corresponding upset of row：
In one alternate embodiment, also include：The nearly user is modulated using QPSK, then：
When the modulation bit of the remote user is 0000 or 1101 or 0011 or 1111, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0100 or 1000 or 0111 or 1011, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0001 or 1101 or 0010 or 1110, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0101 or 1001 or 0110 or 1010, the nearly user
QPSK constellation points be with the corresponding relation of bit：
In one alternate embodiment, also include：The nearly user is modulated using 16QAM, then：
When the modulation bit of the remote user is 0000 or 1101 or 0011 or 1111, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0100 or 1000 or 0111 or 1011, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0001 or 1101 or 0010 or 1110, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0101 or 1001 or 0110 or 1010, the nearly user
16QAM constellation points be with the corresponding relation of bit：
In one alternate embodiment, the power splitting factor ensures the modulation constellation superposition of the nearly user
Constellation overlap is not produced after in the constellation point of the remote user.
The power splitting factor span under different overlaying schemes is given below：
When remote user and nearly user are modulated using QPSK simultaneously, the value of power splitting factor needs to meet：
0<α≤0.5.When remote user is modulated using QPSK, power factor when nearly user is modulated using 16QAM
Span is：0<α≤0.3571.When remote user is modulated using 16QAM, nearly user adopts QPSK
Power factor span during modulation is：0<α≤0.1227.When simultaneously remote user and nearly user adopt
16QAM modulate when power factor span be：0<α≤0.1.
The present invention can realize meeting the compound constellation of Gray mappings.
Embodiment 1
The present embodiment is mainly used in the superposed transmission of two users in PDSCH channels.First enter according to certain criterion
The selection of row pairing user, in order to obtain the preferable compromise of performance and complexity, can include one in pairing user
The individual nearer user in base station with a distance from base station user farther out (referred to as remote user) and (referred to as closely uses
Family).General remote user can have relatively low signal to noise ratio, and nearly user then has higher signal to noise ratio.Therefore,
Code word (codeword) number that remote each TTI of user is transmitted will be generally less than the code word number equal to nearly user.
Fig. 1～and Fig. 3 is referred to, supercomposed coding flow chart of the two users in different transmission code numbers of words is sets forth.
Nearly user's single codeword transmission in Fig. 1, remote user's single codeword transmission；The double codeword transmissions of nearly user in Fig. 2, far
User's single codeword is transmitted；The double codeword transmissions of nearly user in Fig. 3, the double codeword transmissions of remote user.In figure, TBN,1
Represent first transmission block of the nearly user after channel coding and rate-matched, TBN,2Represent nearly user
Second transmission block after channel coding and rate-matched, TBF,1Represent remote user through channel coding
With first transmission block after rate-matched, TBF,2Represent remote user through channel coding and rate-matched it
Second transmission block afterwards.Parameter alpha represents the power splitting factor of superposition user.
In such scheme, mapping is directly modulated after each code word bits stream of remote user is scrambled,
And each code word bits stream of nearly user before modulation can be according to the bit information of remote user to nearly user's
Modulation constellation carries out necessary upset, and nearly user is modulated mapping using the constellation after upset.Distance is used
Symbol data of the family after modulation mapping is multiplied by be stacked up after corresponding power splitting factor and enter together
Row layer maps and pre-encode operation, and corresponding OFDM symbol is generated through RE mappings again after precoding
Afterwards radio frequency transmission is carried out by corresponding antenna port.
Nearly user in the present embodiment after scrambling with modulation before constellation upset concrete upset mode
Determined by the modulation system and modulation bit of remote user.The modulation system that at present LTE is supported include QPSK,
16QAM, 64QAM and 256QAM.In view of using the Receiver Complexity and system during supercomposed coding
The superposition constellation combination of the good compromise of performance, remote user and nearly user include QPSK+QPSK,
QPSK+16QAM, 16QAM+QPSK and 16QAM+16QAM.Therefore far use in supercomposed coding
Family generally includes two kinds of modulation schemes of QPSK and 16QAM.Be given separately below when remote user adopts QPSK
The constellation rotation scheme of nearly user when modulating with 16QAM.
Embodiment 2
When remote user is modulated using QPSK, the modulation constellation of employing refer to Fig. 4, then the star of nearly user
Seat can be overturn accordingly following the next rules：
When the modulation bit of remote user is 00, the QPSK constellation points of nearly user and the corresponding relation of bit
It is as follows：
When the modulation bit of remote user is 01, the modulation constellation of nearly user needs to be spun upside down, and turns over
QPSK constellation points after turning are as follows with the corresponding relation of bit：
When the modulation bit of remote user is 11, the modulation constellation of nearly user needs first to be spun upside down again
Left and right upset is carried out, the QPSK constellation points after upset are as follows with the corresponding relation of bit：
When the modulation bit of remote user is 10, the modulation constellation of nearly user needs left and right upset, overturns it
QPSK constellation points afterwards are as follows with the corresponding relation of bit：
Fig. 6 gives two users when remote user is modulated using QPSK, and nearly user adopts 16QAM constellations
The compound constellation that superposition is formed.
Embodiment 3
When remote user adopts 16QAM modulation constellations, constellation mapping mode such as Fig. 7 of employing is then corresponded to
Constellation upset criterion it is as follows：
Fig. 8 is given remote user and is modulated using 16QAM, superposition output when nearly user is modulated using QPSK
Compound planisphere.
When remote user's bit information is 0000 or 1101 or 0011 or 1111, according to above-mentioned upset rule,
The constellation of nearly user keeps constant, and corresponding QPSK constellation points are as follows with the corresponding relation of bit：
When remote user profile bit is 0100 or 1000 or 0111 or 1011, the modulation constellation of nearly user
Needs carry out left and right upset, and corresponding QPSK constellation points are as follows with the corresponding relation of bit after upset：
When remote user profile bit is 0001 or 1101 or 0010 or 1110, the modulation constellation of nearly user
Needs are spun upside down, and corresponding QPSK constellation points are as follows with the corresponding relation of bit after upset：
When remote user profile bit is 0101 or 1001 or 0110 or 1010, the modulation constellation of nearly user
Need first to be spun upside down, then carry out left and right upset or first carry out left and right upset, then spun upside down,
Corresponding QPSK constellation points are as follows with the corresponding relation of bit after upset：
Embodiment 4
The value of power splitting factor α is selected should be guaranteed that and is added in the constellation point of remote user in embodiment 1
Nearly user's constellation do not overlap.Fig. 9 gives far and near with adopting per family when power splitting factor is α
The geometrical relationship of each constellation point in the compound planisphere that supercomposed coding is exported when QPSK is modulated.On ensureing
The compound constellation for stating schematic design making meets Gray mappings, while ensureing remote user's detection performance, the selection of α
Should be guaranteed that the modulation constellation of nearly user will not be produced such as Figure 10 institutes after being added in the constellation point of remote user
The constellation overlapping phenomenon for showing.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of said method embodiment can
To be completed by the related hardware of programmed instruction, aforesaid program can be stored in an embodied on computer readable and deposit
In storage media, the program upon execution, performs the step of including said method embodiment；And aforesaid storage
Medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：Above example is only illustrating technical scheme, rather than it is limited
System；Although being described in detail to the present invention with reference to the foregoing embodiments, one of ordinary skill in the art
It should be understood that：It still can modify to the technical scheme described in foregoing embodiments, or to it
Middle some technical characteristics carry out equivalent；And these modifications or replacement, do not make appropriate technical solution
Essence departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a kind of descending multi-user superposed transmission method, it is characterised in that include：
Carry out matching the selection of user according to predetermined criterion, the pairing user includes remote user and nearly user；
Each code word bits stream of the nearly user after scrambling, modulation mapping before be also modulated constellation
Upset, is then modulated mapping using the modulation constellation after upset；
The symbol data of the remote user and nearly user after modulation mapping be multiplied by corresponding power division because
Stacking up layer mapping and the pre-encode operation of carry out together after son, reflects through RE again after the precoding
Penetrate, generate and radio frequency transmission is carried out by corresponding antenna port after corresponding OFDM symbol.
2. method according to claim 1, it is characterised in that the mode of the modulation constellation upset
Determined according to the modulation system and modulation bit of the remote user.
3. method according to claim 2, it is characterised in that the mode of the modulation constellation upset
Determine to include according to the modulation system and modulation bit of the remote user：
The remote user is modulated using QPSK, and the modulation constellation of the nearly user is carried out following the next rules
Corresponding upset：
4. method according to claim 3, it is characterised in that also include：The nearly user also adopts
Modulated with QPSK, then：
When the modulation bit of the remote user is 00, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 01, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 11, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
When the modulation bit of the remote user is 10, QPSK constellation points and the bit of the nearly user
Corresponding relation is：
5. method according to claim 3, it is characterised in that also include：The nearly user adopts
16QAM is modulated, then：
When the modulation bit of the remote user is 00, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 01, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 11, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
When the modulation bit of the remote user is 10, the 16QAM constellation points and bit of the nearly user
Corresponding relation be：
6. method according to claim 2, it is characterised in that the mode of the modulation constellation upset
Determine to include according to the modulation system and modulation bit of the remote user：
The remote user is modulated using 16QAM, and the modulation constellation of the nearly user enters following the next rules
The corresponding upset of row：
7. method according to claim 6, it is characterised in that also include：The nearly user adopts
QPSK is modulated, then：
When the modulation bit of the remote user is 0000 or 1101 or 0011 or 1111, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0100 or 1000 or 0111 or 1011, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0001 or 1101 or 0010 or 1110, the nearly user
QPSK constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0101 or 1001 or 0110 or 1010, the nearly user
QPSK constellation points be with the corresponding relation of bit：
8. method according to claim 6, it is characterised in that also include：The nearly user adopts
16QAM is modulated, then：
When the modulation bit of the remote user is 0000 or 1101 or 0011 or 1111, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0100 or 1000 or 0111 or 1011, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0001 or 1101 or 0010 or 1110, the nearly user
16QAM constellation points be with the corresponding relation of bit：
When the modulation bit of the remote user is 0101 or 1001 or 0110 or 1010, the nearly user
16QAM constellation points be with the corresponding relation of bit：
9. the method according to claim 1～8 any one, it is characterised in that the power division
The factor ensures that the modulation constellation of the nearly user does not produce star after being added in the constellation point of the remote user
Seat is overlapped.
10. method according to claim 9, it is characterised in that the power splitting factor α's takes
Value scope includes：
Remote user and nearly user are modulated using QPSK simultaneously when, the span of the power splitting factor：
0<α≤0.5；
Remote user is modulated using QPSK, when nearly user is modulated using 16QAM, the power splitting factor
Span：0<α≤0.3571；
Remote user is modulated using 16QAM, when nearly user is modulated using QPSK, the power splitting factor
Span：0<α≤0.1227；
Remote user and nearly user are modulated using 16QAM simultaneously when, the power splitting factor span：
0<α≤0.1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736285.XA CN106656281A (en) | 2015-11-03 | 2015-11-03 | Downlink multi-user superposition transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736285.XA CN106656281A (en) | 2015-11-03 | 2015-11-03 | Downlink multi-user superposition transmission method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106656281A true CN106656281A (en) | 2017-05-10 |
Family
ID=58809422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510736285.XA Pending CN106656281A (en) | 2015-11-03 | 2015-11-03 | Downlink multi-user superposition transmission method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106656281A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017194017A1 (en) * | 2016-05-13 | 2017-11-16 | 中兴通讯股份有限公司 | Information modulation method and apparatus |
| WO2018223841A1 (en) * | 2017-06-08 | 2018-12-13 | 华为技术有限公司 | Downlink multi-user superposition transmission method and apparatus, storage medium and program product |
| WO2019028885A1 (en) * | 2017-08-11 | 2019-02-14 | 南通朗恒通信技术有限公司 | Method and device used in user equipment and base station of wireless communication |
| WO2024125523A1 (en) * | 2022-12-13 | 2024-06-20 | 维沃移动通信有限公司 | Codebook allocation methods and apparatuses, device, system, and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174932A (en) * | 2006-10-31 | 2008-05-07 | 华为技术有限公司 | High-speed descending sharing channel coding multiplexing method and system |
| CN102387106A (en) * | 2010-08-30 | 2012-03-21 | 华为技术有限公司 | Method and device for performing data modulation in multi-user multi-input multi-output (MU-MIMO) communication system |
| US8312329B1 (en) * | 2011-06-13 | 2012-11-13 | Litepoint Corporation | System and method for using a single vector signal generator to verify device under test |
-
2015
- 2015-11-03 CN CN201510736285.XA patent/CN106656281A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174932A (en) * | 2006-10-31 | 2008-05-07 | 华为技术有限公司 | High-speed descending sharing channel coding multiplexing method and system |
| CN102387106A (en) * | 2010-08-30 | 2012-03-21 | 华为技术有限公司 | Method and device for performing data modulation in multi-user multi-input multi-output (MU-MIMO) communication system |
| US8312329B1 (en) * | 2011-06-13 | 2012-11-13 | Litepoint Corporation | System and method for using a single vector signal generator to verify device under test |
| CN102833014A (en) * | 2011-06-13 | 2012-12-19 | 莱特普茵特公司 | System and method for using a single vector signal generator to verify device under test |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017194017A1 (en) * | 2016-05-13 | 2017-11-16 | 中兴通讯股份有限公司 | Information modulation method and apparatus |
| WO2018223841A1 (en) * | 2017-06-08 | 2018-12-13 | 华为技术有限公司 | Downlink multi-user superposition transmission method and apparatus, storage medium and program product |
| WO2019028885A1 (en) * | 2017-08-11 | 2019-02-14 | 南通朗恒通信技术有限公司 | Method and device used in user equipment and base station of wireless communication |
| WO2024125523A1 (en) * | 2022-12-13 | 2024-06-20 | 维沃移动通信有限公司 | Codebook allocation methods and apparatuses, device, system, and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9596017B1 (en) | Transmission-mode-aware rate matching in MIMO signal generation | |
| US10873652B2 (en) | Signal field encoding in a high efficiency wireless local area network (WLAN) data unit | |
| CN104660383B (en) | To constrain the scrambling and modulation that confirm/deny the constellation sizes of transmitting | |
| US20180019794A1 (en) | Systems and methods for downlink control information for multiple-user superposition transmission | |
| CN103825638B (en) | Method for allocating phich for multiple uplink codewords | |
| US10084574B2 (en) | Multiple component carrier OFDMA communication system | |
| CN107683595A (en) | Constellation overlapping system and method | |
| US10205621B2 (en) | Differential signal mapping for cell-edge and cell-center user equipments | |
| Li et al. | Composite multiple-mode orthogonal frequency division multiplexing with index modulation | |
| TW201644245A (en) | Apparatus and method for superposition transmissions, and user equipment | |
| KR102463270B1 (en) | Semi-orthogonal multiple access with power-adaptive constellation | |
| US20100027704A1 (en) | Method and Apparatus for Data Transmission Based on Signal Priority and Channel Reliability | |
| CN107926032A (en) | Information carrying means, method and communication system | |
| CN106656281A (en) | Downlink multi-user superposition transmission method | |
| CN103905150B (en) | Adaptive transmission method and system based on bit division multiplexing | |
| Wen et al. | Index modulation for OFDM communications systems | |
| CN107493122A (en) | A kind of spatial modulation transmission method and equipment | |
| TWI416896B (en) | Methods and apparatus for data transmission based on signal priority and channel reliability | |
| CN106533610A (en) | Data transmission method, device and system based on dual-carrier modulation (DCM) | |
| CN112929057A (en) | Dual generalized spatial modulation method and system | |
| CN106302299B (en) | Multi-user access method and device | |
| US20240154844A1 (en) | Duplicated-Mode Dual-Carrier Modulation With Coordinate Interleaving | |
| CN106685888A (en) | Downlink two-user superposing transmission method | |
| WO2007049700A1 (en) | Transmission system | |
| KR100957341B1 (en) | Method for transmitting signal in wireless communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170510 |
|
| WD01 | Invention patent application deemed withdrawn after publication |