CN107026681A - Signaling method, method of reseptance, transmitter and receiver - Google Patents

Signaling method, method of reseptance, transmitter and receiver Download PDF

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Publication number
CN107026681A
CN107026681A CN201610069071.6A CN201610069071A CN107026681A CN 107026681 A CN107026681 A CN 107026681A CN 201610069071 A CN201610069071 A CN 201610069071A CN 107026681 A CN107026681 A CN 107026681A
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link
packet
layer
data
information
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CN201610069071.6A
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CN107026681B (en
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钱辰
喻斌
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Beijing Samsung Telecom R&D Center
Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Priority to CN201610069071.6A priority Critical patent/CN107026681B/en
Priority to KR1020187006159A priority patent/KR102650862B1/en
Priority to PCT/KR2016/011746 priority patent/WO2017069510A1/en
Publication of CN107026681A publication Critical patent/CN107026681A/en
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    • 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
    • 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
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • 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
    • 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
    • H04B7/0417—Feedback systems
    • 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
    • H04B7/0426—Power distribution
    • 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
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • H04B7/0608—Antenna selection according to transmission parameters
    • 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
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • H04B7/0608—Antenna selection according to transmission parameters
    • H04B7/061—Antenna selection according to transmission parameters using feedback from receiving side
    • 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
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

This application provides a kind of signaling method, methods described includes：Emitter transmission link packet configuration information；Wherein, link packet configuration information is the information for dividing a link into the included link of each packet after at least two packets；Emitter is treated transmitting data stream according to the packet of link and is layered；Emitter carries out spatial modulation to the data flow after layering；Emitter carries out multi-carrier modulation to the signal after spatial modulation；Emitter is transmitted to the signal after multi-carrier modulation.Present invention also provides a kind of signal acceptance method, a kind of emitter and a kind of receiver.The characteristic of the application utilization space modulating system provides different degree of protections for different data streams so that the different user of channel condition results in the different service of quality.

Description

Signaling method, method of reseptance, transmitter and receiver
Technical field
The application is related to wireless communication technology field, more particularly to a kind of signal sending, receiving method, emitter And receiver.
Background technology
The fast development of information industry, especially from mobile Internet and Internet of Things (IoT, internet of things) Increased requirement, bring unprecedented challenge to future mobile.Such as according to International Telecommunication Union ITU Report ITU-R M. [IMT.BEYOND 2020.TRAFFIC], it is contemplated that to the year two thousand twenty, mobile service Amount growth relative (the 4G epoch) in 2010 will increase nearly 1000 times, and user equipment connection number also will be more than 170 Hundred million, as the IoT equipment of magnanimity gradually penetrates into mobile communications network, connection number of devices will be more surprising.For This unprecedented challenge is tackled, communications industry circle and academia have expanded extensive 5th generation movement and led to Technical research (5G) is believed, towards the year two thousand twenty generation.At present in ITU report ITU-R M. [IMT.VISION] In future 5G framework and overall goals are being discussed, wherein to 5G demand prospect, application scenarios and respectively Item important performance indexes are elaborated.For the new demand in 5G, ITU report ITU-R M. [IMT.FUTURE TECHNOLOGY TRENDS] provides the relevant information for 5G technological trends, Aim to solve the problem that throughput of system be obviously improved, Consumer's Experience uniformity, autgmentability with support IoT, time delay, efficiency, The prominent questions such as cost, network flexibility, the support of emerging service and flexible spectrum utilization.
Multiple-input and multiple-output (Multiple-input multiple-output, MIMO) technology is to improve system spectrum The important means of efficiency.Because MIMO technique can effectively improve system data rate, system chain is improved Road stability, it has been widely used in the Voice ＆ Video field of broadcast type and commercial signal communication system, For example 3G (Third Generation) Moblie partner program (3rd Generation Partnership Project, 3GPP) is made The fixed corresponding Long Term Evolution of Evolved Universal Terrestrial Radio Access (E-UTRA) agreement (Long Term Evolution, LTE) system, European second generation digital video (Digital Video Broadcasting, DVB) and IEEE802.16 worldwide interoperability for microwave accesses (World Interoperability for Microwave Access, WiMAX) etc..MIMO technology between the different antennae of sending and receiving end by setting up communication chain Road, can provide space diversity gain and spatial multiplex gains for system.By in different link transmission identicals Data, MIMO technology improves the reliability of transmission data, so as to obtain diversity gain；By in difference The different data of link transmission, MIMO technology can improve the frequency of system on the premise of transmission bandwidth is not increased Spectrum efficiency, so as to improve transmission data rate.By the channel condition information of transmitting terminal, MIMO technology can also By with coding come simultaneously, the multiple users of same frequency service, improve the overall spectrum efficiency of system.At present, MIMO Technology can be good at supporting the mobile broadband (Mobile Broadband, MBB) in 4G epoch as key technology Business demand.In 5G, the demand of spectrum efficiency, energy efficiency and data transfer rate will be lifted further, existing MIMO technology is difficult to the significant increase for meeting data transfer rate.Therefore the evolution technology of MIMO technology：On a large scale MIMO has obtained the extensive concern of academia and industrial quarters.By being configured in transmitting terminal far more than the day of number of users Line, extensive MIMO technology while can obtain bigger ARRAY PROCESSING gain (thinner wave beam), Also bigger spatial degrees of freedom has been obtained, can have been distinguished user completely by simple linear operation, therefore So that spectrum efficiency further obtains tremendous increase with energy efficiency.But in practical application scene, MIMO Technology also encounters some problems with extensive MIMO technology, for example：1.MIMO technologies whether effectively, can Lean on, accurate channel condition information whether is resulted in dependent on transmitting terminal.If the channel condition information of transmitting terminal It is not accurate enough, being remarkably decreased for system gain can be caused.Current MIMO technology, which is depended on, is based on reference signal Channel estimation and feedback, and when antenna number increase, reference signal will be tight with feeding back brought expense The spectrum efficiency of system is reduced again.2. the synchronous requirement antenna is strict.3. receiving terminal is needed between processing antenna Interference.Although 4. multiuser MIMO can improve the overall spectrum efficiency of cell, for unique user The raising of spectrum efficiency is then helpless.
As a branch of MIMO technology, spatial modulation (Spatial Modulation, SM) is obtained in recent years Obtained the extensive concern of academia.A part of information bit is used to select transmission antenna by SM technologies, every time transmission Using only an antenna.By using antenna index as transmission information additional carrier, in conventional two-dimensional planisphere On the basis of construct three-dimensional constellation map, so as to obtain the spectrum efficiency higher than a single aerial system.Simultaneously SM technologies also solve some problems of traditional MIMO technology.For example, Dan Tian is used only due to transmitting every time Line, SM technologies do not need receiving terminal to carry out the elimination disturbed between complicated antenna between synchronization and link, simplify and connect The processing of receiving end；SM technologies can increase the spectrum efficiency of unique user, therefore be more suitable for some and need to improve The scene of unique user data transfer rate；SM technologies need not carry out precoding in transmitting terminal, therefore receiving terminal need not enter Row feedback；Transmitting terminal only needs a radio frequency link, greatly reduces the expense of transmitting terminal.Based on multicarrier Although SM technologies lose the advantage of single radio frequency link, but the system that is assigned as of time frequency two-dimensional resources is provided The higher free degree, while also having more preferable robustness to frequency selective fading caused by multipath.
The advantage of SM technologies causes it to obtain extensive concern in Communication Studies.It does not need channel feedback, The characteristics of not requiring receiving terminal antenna amount makes it be particularly suitable for data under broadcast data or open loop mode Send.For application of the extending space modulation technique in 5G, play the advantage of space-modulation technique, it is necessary to after Supervention digs its feature, improves its scheme under different application scene.
The content of the invention
The technical problems to be solved by the invention be cellular system broadcast data transmission in can not for channel condition not Same user provides differentiated service.Therefore, this application provides a kind of signaling method, method of reseptance, Transmitter and receiver, the characteristic of utilization space modulating system provides different degree of protections for different data streams, So that the different user of channel condition results in the different service of quality.
The invention provides a kind of signaling method, methods described includes：
Emitter transmission link packet configuration information；Wherein, link packet configuration information be divide a link into The information that each is grouped included link after few two packets；
Emitter is treated transmitting data stream according to the packet of link and is layered；
Emitter carries out spatial modulation to the data flow after layering；
Emitter carries out multi-carrier modulation to the signal after spatial modulation；
Emitter is transmitted to the signal after multi-carrier modulation.
Divide a link at least two packets preferably, described and include：Whole available links are divided at least two Individual packet, resulting packet is used as the packet in first layer；It is respectively that each packet in first layer is further It is divided at least two packets, each during resulting packet is layered as second is grouped；By that analogy, until Untill each packet only includes a link or the demand of link packet for reaching setting.
Include preferably, the emitter treats transmitting data stream progress layering according to the packet of link：
Basic data is transmitted with the packet in first layer, preceding layer is grouped in in each layer in addition to first layer On the basis of transmit assistance data；Wherein, the assistance data includes following at least one：Based on basic number Growth data on, the redundancy of previous layer data, the combination of the growth data and redundancy.
Preferably, the criterion being grouped to link is：The link that correlation metric is more than given threshold is divided into One group.
Preferably, this method also includes：Emitter estimates the correlation between link according to the information from receiver Index, and the packet of dynamic adjustment number of links and link accordingly；Wherein, the information from receiver includes The channel condition information and/or receiver of receiver feedback are sent to the detection of emitter with reference to letter by up channel Number.
Preferably, this method also includes：Link packet configuration information identical user is divided into one group, in The user of same packet carries out broadcast service on same running time-frequency resource.
Preferably, this method also includes：
After being pre-processed to the signal after spatial modulation, then carry out multi-carrier modulation and send.
Preferably, the pretreatment includes：Power adjustment is carried out to link and/or horizontal phasing control is entered to link.
Preferably, described include to link progress power adjustment：Under conditions of keeping transmit power constant, adjust The average emitted power that each in whole first layer is grouped so that each packet has different average emitted power； Under conditions of the average transmitting power that each in keeping first layer is grouped is constant, each in the adjustment second layer is grouped Average emitted power so that in the second layer each packet have different average emitted power；By that analogy, Untill until lowermost layer, each average emitted power adjustment being grouped is finished.
Preferably, the criterion for adjusting the average emitted power of each layer packet is：The power adjustment of later layer is little In the power adjustment of preceding layer.
Horizontal phasing control is entered to link included preferably, described：For the link random selection of each packet of lowermost layer Rotatable phase, belong to each link of different grouping rotatable phase it is interval non-intersect, be in preceding layer belong to It is interval in the adjacent rotatable phase of the link selection of each packet of same packet.
Preferably, using the constellation point symbol transmission bottom data in spatial modulation, or transmit other auxiliary or Redundancy.
Preferably, this method also includes：Emitter is according to the packet transmission reference signal of link.
Preferably, the emitter includes according to the packet transmission reference signal of link：Emitter is to belonging to identical The link of packet sends identical reference signal sequence using identical running time-frequency resource, for the equivalent of correspondence packet The estimation of channel coefficients.
If preferably, being to the signal after spatial modulation after pre-processing, then carrying out multi-carrier modulation simultaneously Send, then, before reference signal is sent, in addition to：The pretreatment is carried out to the reference signal.
Preferably, this method also includes：Piecemeal is carried out to each layer data after layering, and in each data block Each layer data add independent cyclic redundancy check (CRC) codes.
Preferably, emitter is in Physical Broadcast Channel, downlink physical control channel and Physical Downlink Shared Channel At least one channel sends the number of links information and link packet configuration information.
Preferably, Physical Broadcast Channel, downlink physical control channel or the thing of emitter transmission addition extra field DSCH Downlink Shared Channel is managed, the extra field is used to indicate number of links information and link packet configuration information.
Preferably, emitter uses the CRC check mask chain way information in Physical Broadcast Channel, it is each Plant the transmission mode at least two CRC check masks of correspondence of Physical Broadcast Channel, each CRC check mask point Dui Ying not a kind of number of links information；Wherein, the transmission mode of Physical Broadcast Channel includes single antenna port transmission mould Formula, double antenna port transmission diversity mode, four antenna port transmission diversity modes；
Physical Broadcast Channel, downlink physical control channel or the physical down of emitter transmission addition extra field are common Channel is enjoyed, the extra field is used to indicate link packet configuration information.
Present invention also provides a kind of emitter, including：
Configuration module, for transmission link packet configuration information；Wherein, link packet configuration information is by link It is divided into the information of the included link of each packet after at least two packets；
Data hierarchy module, is layered for treating transmitting data stream according to the packet of link；
Spatial modulation module, for carrying out spatial modulation to the data flow after layering；
Multi-carrier modulation module, for carrying out multi-carrier modulation to the signal after spatial modulation；
Sending module, for being transmitted to the signal after multi-carrier modulation.
Present invention also provides a kind of signal acceptance method, methods described includes：
Receiver receives link packet configuration information；
Receiver knows what the packet and each packet of link were included according to the link packet configuration information The information of link；
Receiver carries out layered weighting according to the packet of link to the data received.
Include preferably, the receiver carries out layered weighting according to the packet of link to the data received：
Receiver detects all layers of transmission data according to the channel condition information of each link, and according to setting Criterion determines the number of plies remained into；Wherein, the criterion of the setting includes：By the letter of each layer data detected Compared estimate of making an uproar is compared with presetting snr threshold, retains respective layer if the threshold snr value is higher than Data and carry out subsequent treatment, otherwise without subsequent treatment；Or, the criterion of the setting includes：Hair The machine of penetrating be every receiver according to emitter be every layer data individually add whether by CRC check whether by coming Decide whether the data of the reservation respective layer.
Preferably, this method also includes：Receiver successively detects each layer according to the channel condition information being each grouped Data, the signal-to-noise ratio (SNR) estimation that each layer detects data is compared with presetting snr threshold, if higher than institute Snr threshold is stated, then continues the detection of next layer data, otherwise stops detection.
Preferably, this method also includes：Receiver receives reference signal according to the packet of link, and carries out channel Estimation.
Present invention also provides a kind of receiver, including：
Configuration information receiving module, for receives link packet configuration information；
Packet acknowledgement module, for according to the link packet configuration information, know link packet and each The information of the included link of packet；
The data received are carried out layered weighting by detection module for the packet according to link.
The invention provides a kind of use multiple antennas for receive the user of broadcast service provides the method for hierarchical service with Equipment.By using the present invention, the preferable user of channel condition can receive more or more reliable data, And the poor user of channel condition also results in basic service, it is to avoid service quality in traditional broadcast service The problem of being determined according to the worst user of channel condition, for channel condition, different users provides differentiated service.
Brief description of the drawings
Fig. 1 is a kind of existing multicarrier spatial modulation system block diagram；
Fig. 2 is existing MBSFN system schematics；
Fig. 3 is a kind of possible link packet schematic diagram in the embodiment of the present invention one；
Fig. 4 is bit groupings schematic diagram in the embodiment of the present invention one；
The bit error rates of different groups are relatively shown when Fig. 5 is equipped with four receives links for receiving terminal in the embodiment of the present invention one It is intended to；
Different grouping bit error rate performance relatively shows when Fig. 6 is equipped with both links for receiving terminal in the embodiment of the present invention one It is intended to；
Different grouping when Fig. 7 is high correlation between receiving terminal outfit both links in the embodiment of the present invention one, link Bit error rate performance comparison schematic diagram；
Fig. 8 is a kind of data hierarchy schematic diagram in the embodiment of the present invention one；
Fig. 9 is power distribution schematic diagram between the link of the embodiment of the present invention two；
Figure 10 is the operation stream in the embodiment of the present invention three using the multicarrier space-modulation technique for supporting Delamination Transmission Journey schematic diagram；
Figure 11 is that a kind of chain way information in the embodiment of the present invention three and the mode of link packet configuration information are shown It is intended to；
Figure 12 carries the schematic diagram of number of links information for the mode in the embodiment of the present invention three using CRC masks；
The exemplary plot that Figure 13 is packet transmission RS in the embodiment of the present invention four；
The resource allocation schematic diagram that Figure 14 is packet transmission RS in the embodiment of the present invention four；
Figure 15 is the schematic diagram that is grouped to user in the embodiment of the present invention five；
Figure 16 is the schematic flow sheet that is grouped to user grouping in the embodiment of the present invention five；
Figure 17 is the multicarrier space-modulation technique schematic flow sheet based on Delamination Transmission in the embodiment of the present invention five；
Figure 18 is the composition structural representation of a preferable emitter of the invention；
Figure 19 is the composition structural representation of a preferable receiver of the invention.
Embodiment
For the object, technical solution and advantage of the application are more clearly understood, develop simultaneously implementation referring to the drawings Example, is described in further detail to the application.
Space-modulation technique is by the use of the antenna index of data is transmitted as the additional carrier of information, with a single aerial system Compared to higher spectrum efficiency can be obtained under identical bandwidth.And compared with traditional multiaerial system, it is empty Between modulation technique there are following advantages：1. because one in many transmitting antennas is used only in each data transfer, Therefore receiving terminal need not carry out the synchronization between antenna；2. only applicable single transmitting antenna is done between will not producing link Disturb, receiving terminal need not use the higher equalization algorithm of complexity to eliminate interference between link；3. only need a small amount of Radio-frequency channel, can significantly reduce the higher problem of energy consumption caused by radio-frequency channel number is higher, i.e. space and adjust System is a kind of higher system of energy efficiency；4. spatial modulation system is when antenna number of starting is more than reception antenna number Remain able to work.In addition, identical spectrum efficiency can be real by the combination of different antenna number and modulation system It is existing, therefore spatial modulation makes the parameter of system more flexible.Combine such as OFDM (Orthogonal Frequency division multiplexing, OFDM) etc. multi-transceiver technology spatial modulation system, to comprising many Carrier modulation, actual physics channel, the equivalent multi-antenna channel of frequency domain of multicarrier demodulation do spatial modulation, although The less advantage of radio-frequency channel number is lost, but is obtained on the problems such as resource allocation, pilot tone are distributed bigger The free degree, while also more preferable with the compatibility of standard.
The block diagram of multicarrier space-modulation technique is as shown in Fig. 1 left-hand broken line frames, if transmitting terminal antenna number is N, institute It is Q=2 with order of modulationB, wherein B is the bit number for being mapped as a symbol.Its basic handling flow is as follows： Data flow is sent with log2(NQ)=log2(N)+B bits are one group, preceding log2(N) individual bit determines to send data Stream index used, rear B bit map is a qam symbol.With N=2, exemplified by B=2, space The mapping relations of modulation bit to symbol are as shown in table 1.In table 1, antenna index represents to be currently used in transmission number According to antenna index.In the bit sequence of transmission, first bit is used to determine antenna index, latter two bit For the symbol for determining to send.Obtain after spatial modulation symbol, all N number of data flows are in anti-quick Fu Leaf transformation (Inverse Fast Fourier Transform, IFFT), obtains the number transmitted on N root transmission antennas According to stream.
Table 1：Bit-symbol mapping relations
Using the space-modulation technique receiving terminal block diagram of OFDM technology as shown in dotted line frame on the right side of Fig. 1, and set and connect Receiving end is equipped with M antenna.After reception signal is received, receiving terminal can be done to the data flow of every reception antenna Fast Fourier Transform (FFT) (Fast Fourier Transform, FFT), obtains frequency-region signal.If including originator IFFT, Frequency domain equivalent channel matrix including actual physics channel, receiving end FFT is H ∈ CM×N, then respective channel model It can be written as：
Y=Hx+n
Wherein, H is that M multiplies the frequency domain equivalent channel matrix that N-dimensional complex matrix is represented, M is equivalent received link Number, N is equivalent transmitting chain number, CM×NRepresent the MxN dimension matrixes in complex field, y ∈ CM×1For warp The received vector crossed after FFT, x=eisj∈CN×1For the spatial modulation symbolic vector of transmission, n ∈ CM×1To make an uproar Sound vector.Vectorial ei=[0 ..., 0,1,0 ..., 0]T∈CN×1In only i-th element be 1, remaining element is 0, is represented According to bit is sent, only i-th antenna is sent for data, []TRepresent the transposition of vector.Symbol sjFor root According to bit is sent from constellation mapping, for example quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM), pulse amplitude modulation (Pulse Amplitude Modulation, PAM) or phase-shift keying (PSK) (Phase Shift Keying, PSK) symbol chosen in assemble of symbol.Therefore, receiving symbol can be abbreviated as：
Y=hisj+n
Wherein, hi∈CM×1For the i-th row of matrix H.
Receiving terminal is detected using following maximum likelihood algorithm to sending symbol：
Obtain the estimation of transmission antenna indexEstimation with receiving symbolAfterwards, according to the mapping of bit to symbol Rule can obtain launching the estimate of bit stream.
In addition to the spatial modulation system described above for there was only a link transmission data every time, generalized space modulation (Generalized Spatial Modulation, GSM) system transmits a subset of the whole links of activation every time, And the carrier indexed as transmission information of the subset is used, and different links can transmit identical data, with The reliability of raising system；Or the different data of transmission, to improve the data transfer rate of system.It is regarded as herein A kind of form of spatial modulation.
Existing literature [Bit Error Probability of SM-MIMO Over Generalized Fading Channels] And simulation result shows, with traditional open loop MIMO systems (such as Space Frequency Block Coding (Spatial Frequency Block Code, SFBC) or V-BLAST systems) compare, multicarrier spatial modulation system can be more preferable The reception diversity that reception antenna is provided is excavated, can be reached for being equipped with the user of many reception antennas bright The aobvious performance better than conventional open-loop system.And spatial modulation system does not need the property of channel feedback to cause the technology It is particularly suitable for broadcast channel, for example, multimedia broadcast/multi broadcast business (Multi-media is provided Broadcast/Multicast Service, MBMS) Physical Multicast Channel (Physical Multicast Channel, PMCH)。
With multimedia broadcasting SFN (Multimedia Broadcast Single Frequency in existing LTE-A Network, MBSFN) mode MBMS is provided, as shown in Figure 2.In figure, multiple base stations are simultaneously same Take place frequently and send identical broadcast message, the signal from different base station as multipath component, is resulted in ratio by user Higher signal-the interference-to-noise ratio of single cell system (Signal-interference plus noise ratio, SINR), It is well suited for user on the move and Cell Edge User.
Originator channel condition information is difficult by broadcast channel, while the user type of service makes the characteristics of various Traditional MIMO technology is obtained to be difficult to apply, therefore the physical layer Multicast Channel (PMCH) in existing standard is only Use single antenna transmissions.In such a case it is not necessary to the multicarrier spatial modulation skill of information feedback Art can not only utilize the multiple antennas of base station side, can also provide the data transfer rate higher than single antenna transmissions.Pass through With reference to MBSFN, the reliability higher than single cell multicarrier spatial modulation is resulted in.Therefore by spatial modulation Technology, which is used for PMCH, huge potentiality.
It is only capable of being directed to worst channel design transmission means in current MBMS transmission, therefore channel condition is good User is also difficult to obtain more preferable data transfer rate, so as to limit the overall reachable performance of system., will in the application Come to provide quality different services for the different user of channel status with reference to the characteristics of multicarrier space-modulation technique, So as to improve Consumer's Experience, the total systematic function of lifting broadcast channel.The basic ideas of the application are to utilize chain Correlation between road is layered to link so that the data transmitted in different layers result in different protections. Receiver selects the data Layer of detection according to own channel condition when being detected to data.Therefore channel bar The poor user of part remain able to obtain basis data, and the good user of channel condition be then capable of detecting when it is more Data Layer, so as to obtain higher data transfer rate.
Embodiment one:
In the present embodiment, we combine specific system parameter setting to introduce the multicarrier of offer Delamination Transmission Spatial modulation system.Assuming that base station is equipped with 16 transmitting antennas, i.e., at most it can activate 16 links simultaneously.Can Running time-frequency resource is single with Physical Resource Block specified in LTE (Physical Resource Block, PRB) Member, 12 sub- carrier waves of the PRB in 14 adjacent OFDM symbols are constituted.System subcarrier number is 256, available subcarrier is 120, that is, considers continuous 10 subcarriers on frequency domain.It is related using link for checking Property carry out the possibility of Delamination Transmission, spatial phase shift keying (Space Shift Keying, SSK) is used in the present embodiment Modulation, i.e., transmission activates a link every time, but QAM signals are not transmitted on the link activated every time, and The known signal in transmitting transceiver two ends.Channel model is as follows：
Wherein,For frequency domain equivalent channel coefficient matrix,For flat fading MIMO matrix, I.e. its element obeys independent, and average is the multiple Gauss distribution that 0, variance is 1,For originator space Correlation matrix, for weighing the correlation between originator link.Matrix RTIn element can be expressed as：
The element representation m-th of link and the correlation between nth links, dm,nFor m-th of link and n-th Distance between individual link, dminThe minimum range between link is represented, ρ represents relative coefficient, () * represents conjugation.
Between link layered data transport service is provided by the way of layering packet.A kind of preferred link packet according to According to for the correlation between link, as shown in Figure 3.In Fig. 3, all links are drawn according to the correlation between link It is divided into N groups, group 1, group 2 ... group N is designated as respectively.Here, suppose that spatial modulation system only activates a chain Road.After being grouped, b is used1~bnIndicate between the link being activated, group to refer at the link that bit instruction is activated In which packet；Refer to the bit in group and indicate that the link being activated is in the particular location in the packet.This Plant in packet mode, correlation is relatively strong (i.e.：Correlation metric be more than given threshold) link be divided into one group, Belonging to different groups of link has relatively low correlation.Meanwhile, a high position for transmitted bit group is used to indicate activation Which packet link is located in, and low level is used to indicate the link activated in the group (i.e.：Which in the group Bar link activation).It should be noted that the packet mode can be nested, i.e., it can continue according to correlation in group Property is grouped, so as to realize the purpose of multilayer transmission data.
In the present embodiment, communication can transmit 4 bit informations, whole chains every time for the SSK modulation of 16 available links Road is grouped according to three floor.Firstly, for first layer packet, preceding 8 links are divided into one group, rear 8 chains Road is divided into one group, and the link activation in which group is indicated by most significant bit；Secondly, each link group root again It is divided into two groups according to correlation, every group, respectively comprising 4 stronger links of correlation, is grouped as the second layer, and Indicated using secondary high order bit；Finally, using 4 chains in two bit instruction groups of remaining lowest order Which bar in road is activated, and is grouped as third layer.Fig. 4 show bit groupings schematic diagram in the present embodiment. As shown in figure 4, in 4 bit informations, b1To indicate the bit of first layer packet, b2To indicate second layer packet Bit, b3And b4To indicate the bit of third layer packet.
Consider that receiving terminal is equipped with four links, the situation of channel relevancy coefficient ρ=0.1 first.Fig. 5 show this In the case of kind, the getable bit error rate of different grouping institute.Wherein, legend ' first layer ' represents first layer packet, That is the bit error rate of most significant bit；' second layer ' represents second layer packet, the i.e. bit error rate of time high order bit；' the Three layers ' represent third layer packet, the i.e. bit error rate of significant bits；It is ' average ' to represent total bit error rate.It can see Arrive, in this case, first layer packet possesses best error performance, and the performance of third layer packet is worst. Under same bit error rate, the performance of first layer packet is better than second layer packet about 2dB, better than third layer packet about 4dB.Therefore, preferable for channel condition, the higher user of receiving terminal signal to noise ratio can solve whole three layers Data；And for the relatively low user of signal to noise ratio, then can only solve the first layer packet for possessing best error performance Data.
Secondly consider that receiving terminal is equipped with both links, the situation of channel relevancy system ρ=0.3.Fig. 6 show this In the case of kind, the getable bit error rate of different grouping institute.Wherein, legend ' first layer ' represents first layer packet, That is the bit error rate of most significant bit；' second layer ' represents second layer packet, the i.e. bit error rate of time high order bit；' the Three layers ' represent third layer packet, the i.e. bit error rate of significant bits；It is ' average ' to represent total bit error rate.With Fig. 5 As a result it is similar, it is this under the conditions of, remain able to obtain obvious performance difference between different grouping, therefore user can To select suitable data transfer rate according to the channel status of itself.
Finally consider that receiving terminal is equipped with both links, the situation of channel relevancy system ρ=0.5.Fig. 7 show this In the case of kind link high correlation, the getable bit error rate comparable situation of different grouping institute.Wherein, legend ' One layer ' represent first layer packet, the i.e. bit error rate of most significant bit；' second layer ' represents second layer packet, The bit error rate of i.e. secondary high order bit；' third layer ' represents third layer packet, the i.e. bit error rate of significant bits； It is ' average ' to represent total bit error rate.In this case, the performance gap between different layerings becomes apparent.For example The bit error rate is 10-3When, the performance of the first layer data than the second layer data will well about 5dB, than third layer data performance Be better about 8dB.
Fig. 5 to Fig. 7 simulation result explanation, the mode using the transmitting layered data of correlation between link is being received It is more effective when holding many of outfit between antenna or link with certain correlation, user base can ensured While service, for signal to noise ratio, different users provides differentiated service.
It these results suggest that, the link packet mode that the present embodiment is provided can provide difference between different grouping Bit error rate performance, therefore be conducive to system to transmit different data in different grouping.A kind of possible mode To transmit most basic information on the bit that first layer is grouped, the bit of each layer of packet thereafter is carried The extension information on the basis of layer data.For example：Extension information can be the supplementary service on basic business Data or raising time-frequency definition or the data of speech intelligibility.So often decode a layer data equal The raising of data transfer rate can be obtained on the basis of previous layer data.Alternatively possible mode is, in first layer point Most basic information is transmitted on the bit of group, redundancy (example is transmitted on the bit of each layer of packet behind Such as the repetition of the check bit of channel coding, or first layer grouping information).So, a layer data is often solved equal Reliability can be improved on the basis of previous layer data, so as to improve the robustness of system.To obtain data simultaneously Rate can be used in combination with the raising in reliability, above two mode.
Each layer data is detected for ease of receiving terminal, can be by each layer data piecemeal, and add mutually only Vertical CRC check code.Although so can slightly reduce data transfer rate, the number that user can be facilitated to be layered According to detection.Fig. 8 show the schematic diagram of this data hierarchy mode.Data based on first layer data in figure, Other layer datas are that each layer data is divided into number by example in extension or redundancy in first layer data basis, figure According to block 1 and data block 2, and add separate CRC check code respectively to data block 1 and data block 2.
In the channel of the present embodiment, link is grouped according to the correlation between link.Due to used letter In road model, there is bigger correlation apart near link, therefore can be directly according to link in the present embodiment Put in order and be grouped.What is used by most of system is dual polarized antenna, not like-polarized day It is considered that separate between line group, therefore first layer packet can use the polarised direction between different antennae to determine. In view of often having higher correlation between adjacent antenna, entered according to the distance between the antenna of identical polarised direction Row packet is also reliable.In addition it is also possible to be judged according to the channel condition information of user feedback between which link Correlation it is higher, and the packet entered according to these information between line link.
It should be noted that, although constellation point symbol is not considered in emulation given by the present embodiment, such as The situation of the transmission such as qam symbol or PSK symbols, but a part of information can also be carried in real system Transmitted on constellation point symbol.It is required for first detecting greatly in view of actually used low complex degree detection algorithm Link used, it is determined that carrying out follow-up constellation point symbol detection again after the link of originator activation.So if chain Detect that mistake, or link detecting have larger uncertainty in road, it will the detection to constellation point symbol is produced More serious negative effect.In this case, can be lower as priority or importance using constellation point symbol One layer of data are transmitted.The mode of another transmission constellation point symbol is independent using constellation point symbol transmission Data flow, by CRC detection decide whether retain the data flow.In some particular surroundings, for example in the presence of compared with It is tetanic penetrate this kind of link correlation in footpath it is relatively strong in the case of, although link detecting may be inaccurate, but constellation point The accuracy rate of symbol remains able to ensure, in this case, anti-using the single data flow of constellation point symbol transmission And throughput can be improved.Now, some in basic data are should be using the data flow of constellation point symbol transmission Assistance data, such as some layer datas are repeated or redundancy, or some new auxiliary data informations.
Embodiment two：
The present embodiment will provide the multicarrier space-modulation technique of the support Delamination Transmission of transmitting terminal pretreatment.One In a little real systems, due to lacking feedback or feeding back the factor such as undesirable, the link packet configuration of base station may The demand for meeting all users is not ensured that, the pretreatment of different links can now be carried by base station side Difference between high different grouping, so as to improve the correct probability of detection.
Pretreatment in the present embodiment is including but not limited to power distribution and rotatable phase.Two kinds are described separately below The method of pretreatment.
1. power distribution.
On the premise of ensureing that transmitting mean power is constant, the average emitted power that each in adjustment first layer is grouped, So that different packets has different average emitted power；Ensureing the average transmission work(of each packet of first layer On the premise of rate is constant, the average emitted power that each in the adjustment second layer is grouped makes the difference point in the second layer Group has different average emitted power；The work(that each in each layer is grouped is finally given according to above-mentioned steps recursion Rate allocation result.Before the influence that detection to ensure preceding layer will not be adjusted by later layer power is, it is necessary to provide One layer of power adjustment will strictly larger than later layer power adjustment.Fig. 9 show power distribution between link An example.
It is 4 that Fig. 9, which show base station available link number, a kind of packet configuration of point two layers of transmission.Wherein, first layer Each packet includes two links, and each packet includes a link to the second layer.Assuming that average emitted power is 1, On the premise of ensureing that average emitted power is constant, the mean power of adjustment two packets of first layer.For example, such as Shown in Fig. 9, the mean power of first layer packet 1 is adjusted to 1+p, and the mean power of first layer packet 2 is adjusted to 1-p.On the premise of ensureing that each packeting average power of first layer is constant, the power of each packet of the adjustment second layer. For example, each packeting average power of the second layer is adjusted to respectively：1+p+p1,1+p-p1,1-p+p1,1-p-p1.To ensure The detection of first layer packet will not be influenceed by second layer power distribution, therefore, to assure that p>p1。
2. rotatable phase.
In addition to the power adjustment between different links, the differentiation between different grouping can also be increased by rotatable phase Degree.One possible criterion of rotatable phase is the link random selection rotatable phase for each packet for being lowermost layer, Each it is grouped that randomly selected phase interval is non-intersect, is that each that belong to same packet in preceding layer is grouped The adjacent phase interval of link selection.Still using number of links shown in Fig. 9 as 4, exemplified by hierarchy number is 2 system, by It is 4 in lowermost layer packet count, therefore four phase intervals of selection are used as rotatable phase interval.In view of the second layer point Group 1,2 belongs to the same packet of first layer (i.e.：1) first layer is grouped, and second layer packet 3,4 belongs to the One layer another packet is (i.e.：2) first layer is grouped, therefore is grouped the adjacent rotation of 1,2 selections for the second layer Turn phase interval, be that the second layer is grouped the other adjacent rotation interval of 3,4 selections.One simple example is： The rotatable phase interval of four packets of the second layer is respectively：
[0,π/8],[π/8,π/4],[π/2,5π/8],[5π/8,3π/4]。
It is further to note that above two method can be combined with each other, i.e., power adjustment and rotation are carried out simultaneously Phase inversion position, further to improve the distance between different grouping.
Transmit the reference signal estimated for grouped channels (reference signal can be used for the demodulation of each packet) When, reference signal is pre-processed by identical, therefore reference signal is used directly for by the equivalent of pretreatment The estimation of channel coefficients.In addition, for the real system based on physical resource block dispatching, same Physical Resource Block Each running time-frequency resource use identical pretreatment mode.
Embodiment three：
The present embodiment will be provided supports the multicarrier space-modulation technique of Delamination Transmission in real system using this programme In operational process illustrate.
Figure 10 show the operating process using the multicarrier space-modulation technique for supporting Delamination Transmission in the present embodiment Schematic diagram.In base station side, first the number of links information used in notifying user equipment (UE) data transfer with And link packet configuration information, and will be to be sent according to selected number of links information and link packet configuration information Data hierarchy, sends the reference signal corresponding to selected link, multicarrier space is carried out to data to be sent afterwards UE is sent to after modulation.Wherein, number of links information can be pre-set, or be contained in link packet with confidence In breath, therefore, number of links information is the information of optional transmission.Furthermore, it is possible to set a kind of for link packet Packet and each point that specific link packet pattern can make UE know link are specified to UE in pattern, base station The information of the included link of group.
In UE sides, number of links information and link packet configuration information are read first, is passed through afterwards according to the information every Individual link or the reference signal of packet estimation downlink channel state information, are finally detected to data stream, and To the estimation for sending data.
Number of links information refers to number of links used in transmission space modulated signal, due to base station be often equipped with it is more Antenna, it would be preferable to support more link, but according to the difference of channel condition and institute's service user, it is necessary to Suitable number of links is selected as the case may be；Link packet configuration information refers to after selected number of links, to link Packet situation.For a kind of number of links, it is only necessary to specify one or two link packet configuration.Such as base station When the number of links used is 8, a kind of link configuration is that every four links are divided into one group as first layer, often afterwards Both links are divided into one group as the second layer；Or it is divided into one group as first layer per both links.Specific chain Road packet configuration is also determined by channel condition, user configuring.Marriage chain way information and link packet match somebody with somebody confidence Breath, it may be determined that specific packet configuration used in base station.
Above flow is elaborated below.
Base station, can be in Physical Broadcast Channel when notifying UE number of links information with link packet configuration information (Physical Broadcast Channel, PBCH) or Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) middle transmission.When being transmitted in PBCH, following two modes can be selected：
1. new field is added in PBCH, for chain way information and link packet configuration information.
As shown in figure 11, two fields (as shown in extra field in Figure 11) are added in PBCH reserved place, Respectively number of links information indication field and link packet configuration information indication field.
Because in PBCH, defined antenna port number is 1,2 or 4, user passes through blind check and detection CRC The mode of mask is detected, therefore only needs to notify situation of the antenna port number more than 4.For example base station is equipped with 128 The situation of root antenna, the number of links that multicarrier spatial modulation can be used is 2,4,8,16,32,64 and 128 (i.e. 2 powers), when notifying number of links used, can only notifying link number be more than 4 situation, Yi Zhongke The Notification Method of energy is as shown in table 2.
Table 2：A kind of possible number of links information indicating mode when number of links is 128
In table 2, using 3 bit notification UE number of links, wherein most latter two situation is reserved, illustrate this kind of mode More number of links can be supported.In addition, it is contemplated that same number of links only needs to support one or two kinds of packets to match somebody with somebody The demand of Delamination Transmission that can meet is put, therefore two fields newly added only need to take 4 bits.Consider Into PBCH, reserved bit number is 10, therefore the expense of 4 bits is acceptable.
2. pass through CRC mask chain way information.
The mode of traditional PBCH channel notifications user antenna port number is transmission mode blind check+CRC masks, i.e., Mask on CRC check code corresponding to addition respective antenna port number.CRC masks can be used by addition Mode can notify user link number information in the case where not increasing extra field.
Figure 12 show the mode that a kind of preferred utilization CRC masks carry number of links information.Due to PBCH The transmission mode of use includes single antenna port mode, double antenna terminal port antennae diversity mode, four antenna ports day Line diversity mode.To ensure that PBCH transmits the reliability of information, three groups can be divided into CRC masks, respectively Correspondence single antenna port, double antenna port and four antenna ports.Exemplified by shown in Figure 12, CRC masks 1, 2nd, 3 single antenna port is corresponded to, user solves one of mask and can determine that transmission mould used in PBCH Formula is single antenna port mode.Each CRC masks represent a kind of number of links used in actual broadcast channel again Information.If for example, configuration broadcast channel using number of links be 16, PBCH transmission use single antenna port mode, Then selection CRC masks 3 are handled CRC check position.User is learnt by CRC check uses mask 3 Afterwards, it is known that PBCH transmission modes are single antenna port mode, and learn that number of links is used in broadcast channel 16.When making in this way, link packet configuration information still needs to add extra field in reserved place to notify to use Family.
In addition, above two mode can be used in combination, i.e., the same of extra field is added in PBCH reserved places When using CRC masks notify port number so that play a part of improve information reliability.
Above-mentioned number of links information can also be transmitted with link packet configuration information in down control channel, i.e., in control Extra field is added in channel processed, for indicating number of links information and link packet configuration information.It is a kind of possible Indicate that the mode of number of links information is as shown in table 2, wherein bit 000 is represented in link configuration used and PBCH Configuration is identical.
In addition to above two mode, number of links information can also be shared in physical down with link packet configuration information Transmitted in channel (Physical Downlink Shared Channel, PDSCH).
Base station is layered according to the one or more in following criterion to data：
1. according to the data distribution reliability highest bit-level of high priority data stage layered, as highest priority； For the high bit-level of the high data distribution reliability time of preferential level；By that analogy, the minimum data of priority point With the bit-level that reliability is minimum.Here priority can be the priority of application data, i.e. highest priority Data need more efficient, more reliable decoding, and the requirement in terms of the data of low priority its reliabilities then can be with Loosen；Can also be data based on the priority of multi-medium data, i.e. high priority, it is high preferential by decoding The data of level result in the multimedia service on basis, and further detect that the data of low priority can be on basis Improved service quality on the basis of service.
2. or reliability highest bit-level transmits Back ground Information bit, and channel coding is done to Back ground Information bit Afterwards, in the high bit-level transmitting redundancy information bit of reliability time, the redundant digit obtained after further being encoded exists The lower bit-level transmission of reliability.So, often detect a layer data, can improve receive signal can By property.In addition, above two layered mode can be used in combination, to improve data transfer rate and reliability simultaneously.
User can carry out Data Detection when carrying out Data Detection using following two modes：
1. joint-detection.That is user does joint-detection to each layer of data, and obtains each layer of transmission data Estimate.The received signal to noise ratio of each layer data is estimated afterwards, selects the layered data flows on a certain threshold value It is further processed (such as channel decoding and source coding)；If individual-layer data employs piecemeal addition CRC Mode, then can do CRC check to each layer data, retain each layer by verifying.
2. successively detect.The information that each layer data is transmitted successively is detected according to each layer of channel condition information, Untill the received signal to noise ratio of a certain layer is unable to reach a certain threshold value, or until the CRC check of a certain layer does not have Have untill.
Example IV：
In the present embodiment, the reference signal configuration method using scheme provided herein will be provided.
Reference signal can be handled according to the inserted mode in legacy communications system, i.e., believe for different links The reference signal of road estimation uses mutually orthogonal resource transmission, i.e., on mutually orthogonal frequency domain, time resource Transmission, or transmitted on identical running time-frequency resource, but use mutually orthogonal code to distinguish different links.This The method of kind can estimate the channel condition information of each link., can be with joint-detection when carrying out Data Detection Go out the data of each packet, selection reliability reaches that the data more than a certain threshold value being grouped are further and handled. The channel condition information of each packet can also be obtained by way of merging, afterwards again with the mode successively detected Detection obtains each layer of data, until the signal of a certain layer reaches the threshold value of signal to noise ratio.
In the present embodiment, a kind of mode for being grouped transmission of reference signals will be provided.Its basic thought is according to packet Transmission of reference signals so that each layer of data can be detected directly according to the channel condition information of packet, So as to simplify the design of receiver.It is 8 that Figure 13, which show transmitting terminal number of links, the packet when number of plies is 3 The simple examples of transmission of reference signals.In Figure 13, first layer packet includes two groups, and every group includes four links. To distinguish two of first layer packets, it is necessary to two orthogonal reference signals that length is 2, RS1 as shown in the figure And RS2.When sending the reference signal of this layer, on the premise of power constraint is ensured, belong to the four of same packet Individual link sends identical reference signal data, and four links of another packet send the reference with the signal in orthogonal Signal data.Each packet includes both links in second layer packet, and also only need that conveying length is 2 two are just The reference signal of friendship can distinguish different grouping.Specifically, Tu13Zhong, link 1 transmits phase with link 2 Same reference signal, i.e. RS3, while link 5 transmits the reference signal with the signal in orthogonal with link 6, i.e., RS4, remaining link is not activated.The channel status of the channel condition information combination first layer packet of two other packet Information can be calculated and obtained.When transmitting the channel condition information of third layer packet, using four that length is 4 just The reference signal of friendship, RS5 to RS8, i.e., only need to estimate the channel status of link 1,3,5,7 as shown in the figure Information, and the channel condition information of remaining link combination second layer is obtained.
The mode of above-mentioned packet transmission of reference signals can simplify the behaviour of user in the case where not consuming extra resource Make so that the poor user of channel condition can solve basic data faster.
Figure 14 show the time-frequency resource allocating schematic diagram of packet transmission of reference signals.For Figure 13 example showns For, traditional reference signal transmission mode needs 8 orthogonal reference signals, it is necessary to eight orthogonal time-frequencies Resource.According to described above, layer 1 needs two orthogonal reference signals, it is necessary to two orthogonal running time-frequency resources； Layer 2 needs two orthogonal reference signals, it is necessary to two orthogonal running time-frequency resources；And the needs of layer 3 four are orthogonal Reference signal, it is necessary to four orthogonal running time-frequency resources.Therefore, the present invention needs running time-frequency resource and tradition side Formula is identical, but the present invention program can preferably support successively to detect, for the use that channel condition is poor Family is more advantageous.
Embodiment five：
Channel condition information determined link packet configuration and user point according to user feedback will be provided in the present embodiment Assemble the scheme put.
Although the multimedia broadcast/group broadcast service in LTE-A is not supported to be adjusted according to the information of user feedback The processing of transmitting terminal, but for the scheme that the application is proposed, believed according to the channel status of user feedback Breath configures to adjust number of links used with link packet, preferably can provide clothes for the different user of channel condition Business.Meanwhile, the scheme based on feedback can also be applied to user of the service in open loop mode.Specifically, As shown in figure 15, according to the channel condition information of user feedback, base station configures number of links information and link packet The same or analogous user of information is divided into one group, and broadcast service is carried out on same running time-frequency resource.
Specific packet flow is as shown in figure 16.Base station side sends downlink reference signal, for measuring downlink physical letter The channel condition information in road.The reference signal can be analogous to the cell special reference in LTE/LTE-A (Cell-specific Reference Signal, CRS) or channel state information reference signals (CSI-RS).Should Reference signal is different from the effect of reference signal described in embodiment two.UE estimates down channel according to the reference signal, And obtained information feedback will be estimated to base station.Base station is according between the feedback estimation link from UE Correlation, determines the link packet configuration of user, and link packet is configured into same or like user is divided into one Group, broadcast service is carried out to the user in same packet on same running time-frequency resource.
Base station is the correlation between measurement link, can also be sent to the detection of base station by up channel according to UE Reference signal (Sounding Reference Signal, SRS) estimates the status information of up channel, so as to estimate The correlation gone out between downlink.For time division duplex (Time-Division Duplex, TDD) system, utilize The reciprocity of up-downgoing interchannel, can directly obtain the correlation between downlink.For FDD (Frequency-Division Duplex, FDD) system, because correlation is big chi by interchannel between link Influence of fading and decision are spent, therefore the correlation downlink can also be carried out by uplink channel estimation Estimation.
User can pass through the existing order instructions of LTE (Rank Indicator, RI) and pre-coding matrix instruction (Precoding Matrix Index, PMI) feeding back channel state information, under base station is estimated according to the feedback of user Correlation between line link.Feed back for the convenience of the user, can also design base station with being matched somebody with somebody with known link packet per family Pattern code book is put, user configures pattern feedback by order instruction feedback link way information, by link packet to be needed Link packet configuration.
By the estimation to user link correlation, base station can dynamically adjust user grouping, and in descending control Channel or DSCH Downlink Shared Channel notify the running time-frequency resource position needed for its broadcast data of user, and Delamination Transmission Number of links information used and link packet number information.User is read in down control channel or DSCH Downlink Shared Channel Information, know broadcast data resource allocation information and number of links information used and link packet configuration information. According to these information, user reads broadcast data from respective resources.
The multicarrier spatial modulation system signal transacting based on packet transmission including user grouping, pretreatment Flow is as shown in figure 17.Wherein, user grouping and the link configuration based on feedback/uplink select to be optional Part.Structure shown in Figure 17 is also suitable in addition to the broadcast channel suitable for providing multimedia broadcast/multicast service In the transmission of control channel.When the structure is applied into control channel, basic data includes the one of VS .NET Prerequisites A little control information, the control data that growth data can extend for some, the transmission number for increasing control channel According to rate, the redundancy or copy of basic data, the reliability for increasing control channel；It can be used for Work in the receiver of open loop mode, the receiver in this quasi-mode can not effective Feedback channel condition information, Using scheme provided herein, receiver spontaneous can receive data according to the change of channel situation adjustment Speed there is provided greater flexibility and reliability.
Corresponding to the above method, this application provides a kind of emitter, it constitutes structure as shown in figure 18, including：
Configuration module, for transmission link packet configuration information；Wherein, link packet configuration information is by link It is divided into the information of the included link of each packet after at least two packets；
Data hierarchy module, is layered for treating transmitting data stream according to the packet of link；
Spatial modulation module, for carrying out spatial modulation to the data flow after layering；
Multi-carrier modulation module, for carrying out multi-carrier modulation to the signal after spatial modulation；
Sending module, for being transmitted to the signal after multi-carrier modulation.
Corresponding to the above method, present invention also provides a kind of receiver, it constitutes structure as shown in figure 19, bag Include：
Configuration information receiving module, for receives link packet configuration information；
Packet acknowledgement module, for according to the link packet configuration information, know link packet and each The information of the included link of packet；
The data received are carried out layered weighting by detection module for the packet according to link.
The preferred embodiment of the application is the foregoing is only, it is all in the application not to limit the application Spirit and principle within, any modification, equivalent substitution and improvements done etc., should be included in the application guarantor Within the scope of shield.

Claims (25)

1. a kind of signaling method, it is characterised in that methods described includes：
Emitter transmission link packet configuration information；Wherein, link packet configuration information be divide a link into The information that each is grouped included link after few two packets；
Emitter is treated transmitting data stream according to the packet of link and is layered；
Emitter carries out spatial modulation to the data flow after layering；
Emitter carries out multi-carrier modulation to the signal after spatial modulation；
Emitter is transmitted to the signal after multi-carrier modulation.
2. according to the method described in claim 1, it is characterised in that：
It is described to divide a link at least two packets and include：Whole available links are divided at least two packets, Resulting packet is used as the packet in first layer；Each packet in first layer is further divided at least respectively Two packets, each during resulting packet is layered as second is grouped；By that analogy, until each packet Only comprising a link or the demand of link packet for reaching setting untill.
3. method according to claim 2, it is characterised in that：
The emitter treats transmitting data stream progress layering according to the packet of link to be included：
Basic data is transmitted with the packet in first layer, preceding layer is grouped in in each layer in addition to first layer On the basis of transmit assistance data；Wherein, the assistance data includes following at least one：Based on basic number Growth data on, the redundancy of previous layer data, the combination of the growth data and redundancy.
4. the method according to any one of claims 1 to 3, it is characterised in that：
The criterion being grouped to link is：The link that correlation metric is more than given threshold is divided into one group.
5. method according to claim 4, it is characterised in that：
This method also includes：Emitter estimates the correlation metric between link according to the information from receiver, and The packet of dynamic adjustment number of links and link accordingly；Wherein, the information from receiver is anti-including receiver The channel condition information and/or receiver of feedback are sent to the detection reference signal of emitter by up channel.
6. method according to claim 5, it is characterised in that：
This method also includes：Link packet configuration information identical user is divided into one group, in same packet User broadcast service is carried out on same running time-frequency resource.
7. the method according to any one of claim 1 to 6, it is characterised in that this method also includes：
After being pre-processed to the signal after spatial modulation, then carry out multi-carrier modulation and send.
8. method according to claim 7, it is characterised in that：
The pretreatment includes：Power adjustment is carried out to link and/or horizontal phasing control is entered to link.
9. method according to claim 8, it is characterised in that：
It is described that link progress power adjustment is included：Under conditions of keeping transmit power constant, first layer is adjusted In each be grouped average emitted power so that each packet have different average emitted power；Keeping the Under conditions of the average transmitting power of the packet of each in one layer is constant, the average hair that each in the adjustment second layer is grouped Penetrate power so that the packet of each in the second layer has different average emitted power；By that analogy, until minimum Untill the average emitted power adjustment of each packet of layer is finished.
10. method according to claim 9, it is characterised in that：
The criterion for adjusting the average emitted power of each layer packet is：The power adjustment of later layer is not more than preceding layer Power adjustment.
11. the method according to any one of claim 8 to 10, it is characterised in that：
It is described horizontal phasing control is entered to link to include：For lowermost layer, each link being grouped randomly chooses rotatable phase, Belong to each link of different grouping rotatable phase it is interval non-intersect, be to belong to same packet in preceding layer Each packet the adjacent rotatable phase of link selection it is interval.
12. method according to claim 3, it is characterised in that：
Using the constellation point symbol transmission bottom data in spatial modulation, or transmit other auxiliary or redundancy.
13. the method according to any one of claim 1 to 12, it is characterised in that：
This method also includes：Emitter is according to the packet transmission reference signal of link.
14. method according to claim 13, it is characterised in that：
The emitter includes according to the packet transmission reference signal of link：Emitter is to belonging to the chains of same packets Road sends identical reference signal sequence using identical running time-frequency resource, the equivalent channel coefficient being grouped for correspondence Estimation.
15. the method according to claim 13 or 14, it is characterised in that：
If it is to the signal after spatial modulation after pre-processing, then carry out multi-carrier modulation and send, So, before reference signal is sent, in addition to：The pretreatment is carried out to the reference signal.
16. the method according to any one of claim 1 to 15, it is characterised in that：
This method also includes：Piecemeal is carried out to each layer data after layering, and is each number of plies in each data block According to the cyclic redundancy check (CRC) codes that addition is independent.
17. the method according to any one of claim 1 to 16, it is characterised in that：
At least one of the emitter in Physical Broadcast Channel, downlink physical control channel and Physical Downlink Shared Channel Channel sends the number of links information and link packet configuration information.
18. method according to claim 17, it is characterised in that：
Physical Broadcast Channel, downlink physical control channel or the physical down of emitter transmission addition extra field are common Channel is enjoyed, the extra field is used to indicate number of links information and link packet configuration information.
19. method according to claim 17, it is characterised in that：
Emitter uses the CRC check mask chain way information in Physical Broadcast Channel, and each physics is wide The transmission mode at least two CRC check masks of correspondence of channel are broadcast, each CRC check mask corresponds to one respectively Plant number of links information；Wherein, the transmission mode of Physical Broadcast Channel includes single antenna port transmission pattern, double days Line end port transmission diversity mode, four antenna port transmission diversity modes；
Physical Broadcast Channel, downlink physical control channel or the physical down of emitter transmission addition extra field are common Channel is enjoyed, the extra field is used to indicate link packet configuration information.
20. a kind of emitter, it is characterised in that including：
Configuration module, for transmission link packet configuration information；Wherein, link packet configuration information is by link It is divided into the information of the included link of each packet after at least two packets；
Data hierarchy module, is layered for treating transmitting data stream according to the packet of link；
Spatial modulation module, for carrying out spatial modulation to the data flow after layering；
Multi-carrier modulation module, for carrying out multi-carrier modulation to the signal after spatial modulation；
Sending module, for being transmitted to the signal after multi-carrier modulation.
21. a kind of signal acceptance method, it is characterised in that methods described includes：
Receiver receives link packet configuration information；
Receiver knows what the packet and each packet of link were included according to the link packet configuration information The information of link；
Receiver carries out layered weighting according to the packet of link to the data received.
22. method according to claim 21, it is characterised in that：
The receiver carries out layered weighting according to the packet of link to the data received to be included：
Receiver detects all layers of transmission data according to the channel condition information of each link, and according to setting Criterion determines the number of plies remained into；Wherein, the criterion of the setting includes：By the letter of each layer data detected Compared estimate of making an uproar is compared with presetting snr threshold, retains respective layer if the threshold snr value is higher than Data and carry out subsequent treatment, otherwise without subsequent treatment；Or, the criterion of the setting includes：Hair The machine of penetrating be every receiver according to emitter be every layer data individually add whether by CRC check whether by coming Decide whether the data of the reservation respective layer.
23. the method according to claim 21 or 22, it is characterised in that：
This method also includes：Receiver successively detects each layer data according to the channel condition information being each grouped, will The signal-to-noise ratio (SNR) estimation of each layer detection data is compared with presetting snr threshold, if higher than the signal to noise ratio Threshold value, then continue the detection of next layer data, otherwise stops detection.
24. the method according to any one of claim 21 to 23, it is characterised in that：
This method also includes：Receiver receives reference signal according to the packet of link, and carries out channel estimation.
25. a kind of receiver, it is characterised in that including：
Configuration information receiving module, for receives link packet configuration information；
Packet acknowledgement module, for according to the link packet configuration information, know link packet and each The information of the included link of packet；
The data received are carried out layered weighting by detection module for the packet according to link.
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