CN108737307A - A kind of method, transmitter and the receiver of multiple access access - Google Patents

A kind of method, transmitter and the receiver of multiple access access Download PDF

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Publication number
CN108737307A
CN108737307A CN201710247455.7A CN201710247455A CN108737307A CN 108737307 A CN108737307 A CN 108737307A CN 201710247455 A CN201710247455 A CN 201710247455A CN 108737307 A CN108737307 A CN 108737307A
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China
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level
bit
symbol
processing
symbol level
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CN201710247455.7A
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CN108737307B (en
Inventor
熊琦
钱辰
喻斌
孙程君
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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 CN201710247455.7A priority Critical patent/CN108737307B/en
Priority to PCT/KR2018/003545 priority patent/WO2018174686A1/en
Priority to US16/497,425 priority patent/US11695507B2/en
Publication of CN108737307A publication Critical patent/CN108737307A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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

Abstract

An embodiment of the present invention provides a kind of multiple access access method, transmitter and receiver, the method includes：Transmitter carries out channel coding to determine coded sequence to information bit sequence；Transmitter carries out bit-level processing and symbol level to coded sequence and handles, the sequence that obtains that treated, and the sequence that sends that treated；Receiver receives the signal from multiple transmitters.Wherein, signal is that each transmitter in multiple transmitters is handled data by bit-level and symbol level treated signal；Receiver is decoded signal according to bit level processor corresponding with each transmitter and symbol level processor, obtains the corresponding data of each transmitter.Method, transmitter and the receiver of a kind of multiple access access provided in an embodiment of the present invention, can increase can service-transmitter quantity, and then the quantity of receiver service user can be further improved.

Description

A kind of method, transmitter and the receiver of multiple access access
Technical field
The present invention relates to fields of communication technology, specifically, the present invention relates to a kind of multiple access access method, transmitter and Receiver.
Background technology
With the fast development of information industry, especially from mobile Internet and Internet of Things (full name in English：internet Of things, english abbreviation：IoT increased requirement) brings unprecedented challenge to future mobile.Such as basis The report ITU-R M. [IMT.BEYOND 2020.TRAFFIC] of International Telecommunication Union ITU, it is contemplated that arrive the year two thousand twenty, mobile service Amount opposite (the 4G epoch) in 2010 will increase nearly 1000 times, user equipment (full name in English：User Equipment, english abbreviation： UE) connection number also will be more than 17,000,000,000, and as the IoT equipment of magnanimity gradually penetrates into mobile communications network, connection number of devices will more Add surprising.In order to cope with this unprecedented challenge, communications industry circle and academia have expanded extensive 5th generation movement The communication technology (full name in English：5-Generation, english abbreviation：Research 5G), towards the year two thousand twenty generation.At present in the report of ITU Accuse in the frame and overall goals that future 5G is discussed in ITU-R M. [IMT.VISION], wherein the demand to 5G look forward to, Detailed description has also been made in application scenarios and every important performance indexes.For the new demand in 5G, the report ITU-R M. of ITU [IMT.FUTURE TECHNOLOGY TRENDS] provides the relevant information of technological trend for 5G, it is intended to which solution system gulps down The amount of spitting is obviously improved, user experience consistency, autgmentability are to support IoT, time delay, efficiency, cost, network flexibility, new industrial The prominent questions such as the support of business and flexible spectrum utilization.
In face of the more diversified business scenarios of 5G, need flexible multiple access technology that different scenes is supported to be needed with business It asks.How for example, in face of the business scenario of magnanimity connection, more UE are accessed in limited resource, become the access of 5G multiple access Technology needs the key problem solved.In current 4G LTE networks, mainly using based on orthogonal frequency division multiplexing (English Full name：Orthogonal Frequency Division Multiplexing, english abbreviation：OFDM multiple access technology), it is as follows Capable orthogonal frequency-time multiple access (full name in English：Orthogonal Frequency Division Multiple Access, English abbreviation：OFDMA) and the single-carrier frequency division multiple access of uplink accesses (full name in English：Single-carrier Frequency Division Multiple Access, english abbreviation：SC-FDMA).However, existing based on orthogonal multiple access technique Obviously it is difficult to meet 5G to reach million ranks for UE access number on 5~15 times of spectrum efficiency promotion and every square kilometre of area Demand.And non-orthogonal multiple accesses (full name in English：Non-orthogonal Multiple Access, english abbreviation：NMA) Technology is multiplexed same asset by multiple UE, so as to greatly promote the UE connection quantity of support.Since UE has more chances to connect Enter so that network entire throughput and spectrum efficiency are promoted.In addition, communicating (full name in English in face of large-scale machines classification： Massive Machine Type Communication, english abbreviation：MMTC) scene, it is contemplated that the cost of terminal and realization Complexity, it may be necessary to use the more simple multiple access technology of operation processing, in face of low delay or the business scenario of low-power consumption, adopt It can be better achieved with non-orthogonal multiple access technology and exempt to dispatch contention access, realize low delay communication, and reduce unlatching Time reduces equipment power dissipation.
The non-orthogonal multiple technology primarily now studied has multiple users share to access (full name in English：Multiple User Shared Access, english abbreviation：MUSA), non-orthogonal multiple accesses (full name in English：Non-Orthogonal Multiple Access, english abbreviation：NOMA), pattern segmentation multiple access accesses (full name in English：Pattern Division Multiple Access, english abbreviation：PDMA), sparse CDMA accesses (full name in English：Sparse Code Multiple Access, english abbreviation：SCMA) and friendship divides multiple access to access (full name in English：Interleave Division Multiple Access, english abbreviation：IDMA) etc..Wherein, MUSA is to distinguish UE by code word, and SCMA is to distinguish UE by code book, NOMA is to distinguish UE by power, and PDMA is to distinguish UE by different Eigen Structures, and IDMA is to pass through interleaved sequence Different UE is distinguished, the detailed content about IDMA can simply refer to an early literatures：Li Ping, Lihai Liu, Keying Wu and W.K.Leung, " Interleave Division Multiple Access ", IEEE Transactions on Wireless Communication, Vol.5, No.4, pp.938-947, Apr.2006.
Therefore, orthogonal access mode, i.e. OFDMA and DFT-s-OFDMA are used in existing LTE system, led to It crosses and distributes orthogonal running time-frequency resource for user to transmit uplink and downlink data, while on identical running time-frequency resource, being also only assigned to One user uses.It in new demand, needs a large amount of user and is connected in network, if still according to existing orthogonal access The utilization rate of mode, resource is unable to get abundant optimization, that is, cannot be satisfied the demand of user's connection of magnanimity, it is therefore necessary to carry The implementation for going out effective multiple access access, exempts to dispatch contention access, low delay communication, low unlatching used time, low equipment to realize The purpose of power consumption, with the more diversified business scenarios of final realization support 5G and business demand.
Invention content
To overcome above-mentioned technical problem or solving above-mentioned technical problem at least partly, spy proposes following technical scheme：
The embodiment of the present invention provides a kind of method of multiple access access according to one side, including：
Transmitter carries out channel coding to determine coded sequence to information bit sequence；
Bit-level processing and symbol level processing are carried out to the coded sequence, the sequence that obtains that treated, and send institute Sequence of stating that treated.
Further, described bit-level processing and symbol level are carried out to the coded sequence to handle, the sequence that obtains that treated The step of row, including：
Bit-level processing is carried out to the coded sequence by bit level processor；
Bit is carried out to symbol-modulated processing to bit-level treated sequence, obtains symbol sebolic addressing；
Symbol level processing is carried out to the symbol sebolic addressing by symbol level processor, the symbol sebolic addressing that obtains that treated.
Further, described in such a way that bit level processor carries out bit-level processing to the coded sequence, including It is any one of following：
Processing is interleaved to the coded sequence by bit-level interleaver；
Scrambling processing is carried out to the coded sequence by bit-level scrambler；
Spread processing is carried out to the coded sequence by bit-level spreader.
Wherein, the transmitter by it is any one of following obtain bit-level interleaver information, bit-level scrambler information and/ Or bit-level spreader information, for carrying out bit-level processing to the coded sequence：
Physical Broadcast Channel；Physical Downlink Control Channel；Physical Downlink Shared Channel.
Further, the mode of symbol level processing is carried out to the symbol sebolic addressing, including any one of following：
Symbol level spread processing is carried out to the symbol sebolic addressing；
Symbol level spread processing and symbol level interleaving treatment are carried out to the symbol sebolic addressing；
Symbol level scrambler processing is carried out to the symbol sebolic addressing；
Symbol level spread processing and the processing of symbol level scrambler are carried out to the symbol sebolic addressing.
Further, the mode of symbol level spread processing is carried out to the symbol sebolic addressing, including：
Symbol level spread processing is carried out to the symbol sebolic addressing by multiple spreading code；
The mode of symbol level interleaving treatment is carried out to the symbol sebolic addressing, including：
Symbol level interleaving treatment is carried out to symbol sebolic addressing by symbol level interleaver；
The mode of symbol level scrambler processing is carried out to the symbol sebolic addressing, including：
Symbol level scrambler processing is carried out to symbol sebolic addressing by symbol level scramble sequence.
Wherein, the processing mode of the symbol level interleaving treatment includes any one of following：Direct interleaving treatment；Zero padding interweaves Processing；Direct zero insertion interleaving treatment；The processing of intertexture zero insertion.
Further, the direct interleaving treatment is to be carried out at symbol level intertexture to symbol sebolic addressing by symbol level interleaver Reason；
The zero padding interleaving treatment is to carry out zero padding processing to symbol sebolic addressing, and handle zero padding by symbol level interleaver Symbol sebolic addressing afterwards carries out symbol level interleaving treatment；
The direct zero insertion interleaving treatment is to carry out zero insertion processing to symbol sebolic addressing according to zero insertion drawing information；
The intertexture zero insertion processing carries out symbol level interleaving treatment for foundation symbol level interleaver to symbol sebolic addressing, and will place Symbol sebolic addressing after reason carries out zero insertion processing according to zero insertion drawing information.
Wherein, the transmitter obtains multiple spreading code, symbol level interleaver and/or symbol level scrambling by any one of following Sequence：
Physical Broadcast Channel；Physical Downlink Control Channel；Physical Downlink Shared Channel.
The method further includes：
If the transmitter is configured with more antennas, and when current data to be sent are single flow data, then the hair Penetrating machine, treated that data are converted to multi-stream data or multi-layer data by symbol level, is emitted by each antenna.
The method further includes：
If transmitter data to be sent are multi-stream data, and the transmitter is configured with more antennas, then presses It is handled according to following at least one mode：
The multi-stream data is handled by channel coding, bit-level processing, modulation and symbol level, layer maps and pre- Processing, the multi-stream data that obtains that treated, and will treated the multi-stream data, emitted by each antenna；
The multi-stream data is passed through into channel coding, bit-level processing, modulation and symbol level processing, phase/power tune Whole processing, overlap-add procedure, serial-parallel conversion processing and pretreatment, the multi-stream data that obtains that treated, and by the processing Multi-stream data afterwards is emitted by each antenna.
The embodiment of the present invention provides a kind of transmitter according on one side, including：
Channel coding module, for carrying out channel coding to information bit sequence to determine coded sequence；
Processing module, the coded sequence for being encoded to the channel coding module carry out bit-level processing and symbol The processing of number grade, the sequence that obtains that treated；
Sending module, for sending treated the sequence.
The embodiment of the present invention is according to other side, the method for providing another multiple access access, including：
Receiver receives the signal from multiple transmitters, and the signal is each transmitter pair in multiple transmitters Data are handled by bit-level and symbol level treated signal；
The receiver is according to bit level processor corresponding with each transmitter and symbol level processor to the letter It number is decoded, obtains the corresponding data of each transmitter.
Further, the receiver is handled according to bit level processor corresponding with each transmitter and/or symbol level Device is decoded the signal, the step of obtaining each transmitter corresponding data, including：
Symbol level decoding process is carried out to the signal using symbol level processor corresponding with each transmitter；
The data after symbol level decoding process are compared using bit level processor corresponding with each transmitter Superfine decoding process.
The signal is decoded according to bit level processor corresponding with each transmitter and symbol level processor Mode, including following any case：
Receiver is respectively according to identical symbol level processor corresponding with each transmitter and mutually different bit-level Processor carries out symbol level decoding process and bit-level decoding process to the signal；
Receiver is handled according to mutually different symbol level processor corresponding with each transmitter and identical bit-level Device carries out symbol level decoding process and bit-level decoding process to the signal；
Group of the receiver according to mutually different symbol level processor corresponding with each transmitter and bit level processor It closes and symbol level decoding process and bit-level decoding process is carried out to the signal.
Further, the method further includes：
If signal comes from each transmitter respectively according to mutually different bit level processor pair for what receiver received Data to be sent carry out bit-level processing, using the signal that symbol level processor obtained after symbol level processing, then connect Receipts machine carries out bit-level decoding process according to mutually different bit level processor to the decoded data of symbol level processor；
If signal comes from each transmitter respectively according to mutually different symbol level processor pair for what receiver received Data carry out the signal obtained after symbol level processing after bit level processor processing, then receiver is according to mutually different symbol level Processor carries out symbol level decoding process to the signal；
If signal is receiver receive from each transmitter respectively according to mutually different bit level processor and The signal that the combination of symbol level processor to sent data obtain after bit-level processing and symbol level processing, then connect Receipts machine carries out symbol level decoding according to the combination of mutually different bit level processor and symbol level processor to the signal Processing and bit-level decoding process.
Further, the combination of the mutually different bit level processor and symbol level processor, including it is following any Combination：
Bit level processor is identical and symbol level processor is different；
Bit level processor is different and symbol level processor is identical；
Bit level processor and symbol level processor are all different.
Further, receiver is respectively according to mutually different bit level processor corresponding with each transmitter and symbol Multiple data that the combination of level processor to the signal obtain after symbol level decoding process and bit-level decoding process It is different.
Wherein, in such a way that bit level processor carries out bit-level decoding process, including following any case：
It is deinterleaved processing by bit-level interleaver；
Solution scrambling processing is carried out by bit-level scrambler；
It carries out despreading processing by bit-level spreader；
Wherein, in such a way that symbol level processor carries out symbol level decoding process, including following any case：
Symbol level, which is carried out, by multiple spreading code despreads processing；
Symbol level is carried out by multiple spreading code, symbol level interleaver respectively to despread at processing and symbol level deinterleaving Reason；
Symbol level descrambling code processing is carried out by symbol level scramble sequence；
Symbol level is carried out by multiple spreading code, symbol level scramble sequence respectively to despread at processing and symbol level descrambling code Reason.
The signal be receiver receive from each transmitter to its respectively through symbol level treated data into Row carrier modulation, and the signal to being obtained after modulated data progress base band to the conversion process of radio frequency；
Wherein, the mode of the carrier modulation treatment includes following any modulation system：Single-carrier modulated processing；Overloading Wave modulation treatment；
Wherein, the single-carrier modulated processing mode includes at least：The orthogonal frequency division multiplexing of discrete Fourier transform DFT extensions With OFDM modulation systems；
The multi-carrier modulation processing mode includes at least following at least one：The modulation system of orthogonal frequency division multiplexing, base In multi-carrier modulation, the continuous OFDM modulation systems of N ranks and filter that OFDM modulation systems, the broad sense of filtering filter Group multi-carrier modulation.
Wherein, the method further includes：
Receiver receives the signal from same transmitter, and the signal is that multiple data flows of same transmitter pass through respectively It is obtained after crossing bit-level processing and symbol level processing；
The signal is decoded to arrive according to bit level processor corresponding with each data flow and symbol level processor From multiple data flows of same transmitter.
Further, the method further includes：
It is handled using mutually different bit-level if the signal that receiver receives is multiple data flows of same transmitter Device is handled by bit-level, and obtained after the processing of symbol level processor, then receiver is according to mutually different bit-level Processor carries out bit-level decoding process to the data after symbol level decoding process；
If the signal that receiver receives be multiple data flows of same transmitter through bit-level, treated that data make Obtained after symbol level is handled with mutually different symbol level processor, then receiver according to mutually different symbol level at Reason device carries out symbol level decoding process to the signal received；
It is handled using mutually different bit-level if the signal that receiver receives is multiple data flows of same transmitter What the combination of device and symbol level processor obtained after bit-level processing and symbol level processing, then receiver is according to mutual not phase The combination of same bit level processor and symbol level processor carries out symbol level decoding process and bit to the signal received Grade decoding process.
Wherein, the signal that receiver receives is to pass through bit-level processing and symbol to multiple data flows of same transmitter Grade processing, then obtain after phase and power adjustment.
Wherein, the method further includes：
If receiver is according to mutually different bit level processor to after the symbol level decoding process of multiple transmitters Data carry out bit-level decoding process when, then receiver according to mutually different symbol level processor to coming from same transmitter Multiple data flows signal carry out symbol level decoding process；
If receiver carries out symbol level solution according to mutually different symbol level processor to the signal from multiple transmitters Code processing when, then receiver according to mutually different bit level processor to multiple data flows from same transmitter through symbol Data after number grade decoding process carry out bit-level decoding process；
Receiver according to mutually different bit level processor and symbol level processor combination to coming from different transmitters The signals of multiple data flows carry out symbol level decoding process and bit-level decoding process.
The embodiment of the present invention provides a kind of receiver according on the other hand, including：
Receiving module, for receiving the signal from multiple transmitters, the signal is each in multiple transmitters Transmitter is handled by bit-level data and symbol level treated signal；
Decoder module, for basis bit level processor corresponding with each transmitter and symbol level processor to described The signal that receiving module receives is decoded, and obtains the corresponding data of each transmitter.
The present invention provides method, transmitter and the receivers of a kind of access of multiple access, are accessed with existing orthogonal multiple access Mode is compared, in the present invention receiver by mutually different symbol level processor and/or bit level processor to receiving Data are decoded processing, can distinguish the data of different transmitters transmitting, and will not be limited by orthogonal resource, Further transmitter is handled data by bit level processor and symbol level processor, is conducive to multiple transmitters It can be in identical running time-frequency resource transmitting data, so that receiver can receive the upper of multiple transmitters transmissions simultaneously Row data, be conducive to identical running time-frequency resource being multiplexed increase to multiple transmitters can service-transmitter quantity, and then can be with Further improve the quantity of receiver service user.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description Obviously, or practice through the invention is recognized.
Description of the drawings
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments Obviously and it is readily appreciated that, wherein：
Fig. 1 is the method flow diagram that a kind of multiple access of the embodiment of the present invention accesses；
Fig. 2 is the method flow diagram that another multiple access of the embodiment of the present invention accesses；
Fig. 3 is the transmitting terminal principle schematic of multiple access technique in the embodiment of the present invention；
Fig. 4 is to access schematic block diagram based on bit-level processing and the multiple access of symbol level processing in the embodiment of the present invention；
Fig. 5 is to access transmitting terminal principle with the multiple access that symbol level is spread again based on bit-level processing in the embodiment of the present invention to show It is intended to；
Fig. 6 is that bit-level interleaver generates and workflow exemplary plot in the embodiment of the present invention；
Fig. 7 is the workflow exemplary plot that symbol level is spread again in the embodiment of the present invention；
Fig. 8 is the workflow exemplary plot that symbol level spreads again (with sparsity) in the embodiment of the present invention；
Fig. 9 is to access principle schematic block based on bit-level processing and the multiple access that symbol level is spread again in the embodiment of the present invention Figure；
Figure 10 is to be sent based on bit-level processing and the multiple access access of symbol level (multiple spread spectrum+intertexture) in the embodiment of the present invention Hold schematic block diagram；
Figure 11 is that symbol level spreads the workflow exemplary plot directly to interweave with symbol level again in the embodiment of the present invention；
Figure 12 is that symbol level spreads the workflow exemplary plot to interweave with symbol level zero padding again in the embodiment of the present invention；
Figure 13 is that symbol level is spread and the workflow exemplary plot of the direct zero insertion of symbol level again in the embodiment of the present invention；
Figure 14 is that symbol level is spread and the workflow exemplary plot of symbol level intertexture zero insertion again in the embodiment of the present invention；
Figure 15 is to spread to access principle with the multiple access to interweave again with symbol level based on bit-level processing in the embodiment of the present invention Schematic block diagram；
Figure 16 is to access transmitting terminal principle with the scrambled multiple access of symbol level based on bit-level processing in the embodiment of the present invention to show Meaning block diagram；
Figure 17 is the scrambled workflow exemplary plot of symbol level in the embodiment of the present invention；
Figure 18 is to access schematic block diagram based on bit-level processing and the scrambled multiple access of symbol level in the embodiment of the present invention；
Figure 19 is to be sent based on bit-level processing and the multiple access access of symbol level (multiple spread spectrum+scrambling) in the embodiment of the present invention Hold schematic block diagram；
Figure 20 is that symbol level is spread and scrambled workflow exemplary plot again in the embodiment of the present invention；
Figure 21 is to spread to access principle with scrambled multiple access again with symbol level based on bit-level processing in the embodiment of the present invention Schematic block diagram；
Figure 22 is to combine being spread again based on bit-level intertexture and symbol level for DFT-s-OFDM more in the embodiment of the present invention The transmitter architecture schematic diagram of location access；
Figure 23 is to combine being spread again based on bit-level intertexture and symbol level for DFT-s-OFDM more in the embodiment of the present invention The receiver structure schematic diagram of location access；
Figure 24 is to interweave with answering spread spectrum multiple access access with symbol level based on bit-level in conjunction with OFDM in the embodiment of the present invention Transmitter architecture schematic diagram；
Figure 25 is to interweave with answering spread spectrum multiple access access with symbol level based on bit-level in conjunction with OFDM in the embodiment of the present invention Receiver structure schematic diagram；
Figure 26 is to interweave with answering spread spectrum multiple access access with symbol level based on bit-level in conjunction with F-OFDM in the embodiment of the present invention The transmitter block diagram schematic diagram of technology；
Figure 27 is to interweave with answering spread spectrum multiple access access with symbol level based on bit-level in conjunction with F-OFDM in the embodiment of the present invention Mode receiver structure schematic diagram；
Figure 28 is to answer spread spectrum multiple access with symbol level based on bit-level intertexture in conjunction with superposition of data stream in the embodiment of the present invention The transmitter architecture schematic diagram of access；
Figure 29 is the multiple antennas combination schematic diagram that individual traffic is only sent in the embodiment of the present invention；
Figure 30 is the multiple antennas combination receiver structure schematic diagram that individual traffic is only sent in the embodiment of the present invention；
Figure 31 is the multiple antennas combination schematic diagram for sending multiple data flows in the embodiment of the present invention and individually mapping；
Figure 32 is the multiple antennas combination schematic diagram based on datastream in the embodiment of the present invention；
Figure 33 is the apparatus structure schematic diagram of transmitter in the embodiment of the present invention；
Figure 34 is the apparatus structure schematic diagram of receiver in the embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one It is a ", " described " and "the" may also comprise plural form.It is to be further understood that is used in the specification of the present invention arranges It refers to there are the feature, integer, step, operation, element and/or component, but it is not excluded that presence or addition to take leave " comprising " Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or wirelessly coupling.It is used herein to arrange Diction "and/or" includes that the whole of one or more associated list items or any cell are combined with whole.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art Language and scientific terminology), there is meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Should also Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art The consistent meaning of meaning, and unless by specific definitions as here, the meaning of idealization or too formal otherwise will not be used To explain.
It includes wireless communication that those skilled in the art of the present technique, which are appreciated that " terminal " used herein above, " terminal device " both, The equipment of number receiver, only has the equipment of the wireless signal receiver of non-emissive ability, and includes receiving and transmitting hardware Equipment, have on bidirectional communication link, can carry out two-way communication reception and emit hardware equipment.This equipment May include：Honeycomb or other communication equipments are shown with single line display or multi-line display or without multi-line The honeycomb of device or other communication equipments；PCS (Personal Communications Service, PCS Personal Communications System), can With combine voice, data processing, fax and/or communication ability；PDA (Personal Digital Assistant, it is personal Digital assistants), may include radio frequency receiver, pager, the Internet/intranet access, web browser, notepad, day It goes through and/or GPS (Global Positioning System, global positioning system) receiver；Conventional laptop and/or palm Type computer or other equipment, have and/or the conventional laptop including radio frequency receiver and/or palmtop computer or its His equipment." terminal " used herein above, " terminal device " they can be portable, can transport, be mounted on the vehicles (aviation, Sea-freight and/or land) in, or be suitable for and/or be configured in local runtime, and/or with distribution form, operate in the earth And/or any other position operation in space." terminal " used herein above, " terminal device " can also be communication terminal, on Network termination, music/video playback terminal, such as can be PDA, MID (Mobile Internet Device, mobile Internet Equipment) and/or mobile phone with music/video playing function, can also be the equipment such as smart television, set-top box.
Fig. 1 is the flow diagram of the launching technique provided by one embodiment of the present invention for multiple access access.
Step 101, transmitter carry out channel coding to determine coded sequence to information bit sequence；Step 102, transmitter Bit-level processing and symbol level processing are carried out to coded sequence, the sequence that obtains that treated, and the sequence that sends that treated.
Wherein, the step of transmitter carries out bit-level processing and symbol level processing to coded sequence in step 102, packet It includes：Transmitter carries out bit-level processing by bit level processor to the coded sequence；To bit-level treated sequence into Row bit obtains symbol sebolic addressing to symbol-modulated processing；The symbol sebolic addressing is carried out at symbol level by symbol level processor Reason, the symbol sebolic addressing that obtains that treated.
Further, transmitter is in such a way that bit level processor carries out bit-level processing to the coded sequence, packet It includes any one of following：
A, transmitter is interleaved processing by bit-level interleaver to the coded sequence.
B, transmitter carries out scrambling processing by bit-level scrambler to the coded sequence.
C, transmitter carries out spread processing by bit-level spreader to the coded sequence.
Further, transmitter by it is any one of following obtain bit-level interleaver information, bit-level scrambler information and/ Or bit-level spreader information：Physical Broadcast Channel；Physical Downlink Control Channel；Physical Downlink Shared Channel.
Further, transmitter carries out the symbol sebolic addressing mode of symbol level processing, including any one of following：
D, transmitter carries out symbol level spread processing to symbol sebolic addressing.
E, transmitter carries out symbol level spread processing and symbol level interleaving treatment to symbol sebolic addressing.
F, transmitter carries out symbol level scrambler processing to symbol sebolic addressing.
G, transmitter carries out symbol level spread processing to symbol sebolic addressing and symbol level scrambler is handled.
Further, transmitter carries out the symbol sebolic addressing mode of symbol level spread processing, can specifically include：Hair It penetrates machine and symbol level spread processing is carried out to the symbol sebolic addressing by multiple spreading code.
Further, transmitter carries out the symbol sebolic addressing mode of symbol level interleaving treatment, can specifically include：Hair It penetrates machine and symbol level interleaving treatment is carried out to symbol sebolic addressing by symbol level interleaver.
Further, transmitter carries out the symbol sebolic addressing mode of symbol level scrambler processing, can specifically include：Hair It penetrates machine and symbol level scrambler processing is carried out to symbol sebolic addressing by symbol level scramble sequence.
Wherein, transmitter obtains multiple spreading code, symbol level interleaver and/or symbol level scrambling sequence by any one of following Row：Physical Broadcast Channel；Physical Downlink Control Channel；Physical Downlink Shared Channel.
Further, the processing mode of symbol level interleaving treatment includes any one of following：Direct interleaving treatment；Zero padding interweaves Processing；Direct zero insertion interleaving treatment；The processing of intertexture zero insertion.
Specifically, direct interleaving treatment is to carry out symbol level interleaving treatment to symbol sebolic addressing by symbol level interleaver；It mends Zero interleaving treatment be zero padding processing carried out to symbol sebolic addressing, and by symbol level interleaver to zero padding treated symbol sebolic addressing into Row symbol level interleaving treatment；Direct zero insertion interleaving treatment is to carry out zero insertion processing to symbol sebolic addressing according to zero insertion drawing information；It hands over Zero insertion processing is knitted to carry out symbol level interleaving treatment to symbol sebolic addressing according to symbol level interleaver, and will treated symbol sebolic addressing Zero insertion processing is carried out according to zero insertion drawing information.
Further, it if transmitter is configured with more antennas, and when current data to be sent are single flow data, then sends out Penetrating machine, treated that data are converted to multi-stream data or multi-layer data by symbol level, is emitted by each antenna.
Further, if transmitter data to be sent are multi-stream data, and the transmitter is configured with more Antenna is then handled according to following at least one mode：
H, transmitter by multi-stream data by channel coding, bit-level processing, modulation and symbol level processing, layer mapping with And pretreatment, the multi-stream data that obtains that treated, and will treated multi-stream data, emitted by each antenna.
I, multi-stream data is passed through channel coding, bit-level processing, modulation and symbol level processing, phase/work(by transmitter Rate adjustment processing, overlap-add procedure, serial-parallel conversion processing and pretreatment, the multi-stream data that obtains that treated, and will processing Multi-stream data afterwards is emitted by each antenna.
An embodiment of the present invention provides a kind of methods of multiple access access, compared with existing orthogonal access mode, In the embodiment of the present invention receiver by mutually different symbol level processor and/or bit level processor to the data that receive It is decoded processing, the data of different transmitters transmitting can be distinguished, and will not be limited by orthogonal resource, into one Step ground transmitter is handled data by bit level processor and symbol level processor, and being conducive to multiple transmitters can In identical running time-frequency resource transmitting data, so that receiver can receive the upper line number that multiple transmitters are sent simultaneously According to, be conducive to identical running time-frequency resource being multiplexed increase to multiple transmitters can service-transmitter quantity, and then can be into one Improve the quantity of receiver service user in step ground.
Fig. 2 is the flow diagram for the multiple access method that another embodiment of the present invention provides.
Wherein, this method includes step 201 and step 202, wherein step 201, receiver, which receive, comes from multiple hairs Penetrate the signal of machine.Wherein, signal is that each transmitter in multiple transmitters passes through bit-level processing and symbol to data Grade treated signal；Step 202, receiver are handled according to bit level processor corresponding with each transmitter and symbol level Device is decoded signal, obtains the corresponding data of each transmitter.
Further, the signal that receiver receives be multiple data flows of same transmitter are handled by bit-level and Symbol level processing, then obtain after phase and power adjustment.
Wherein specifically included in step 202：Receiver use symbol level processor pair corresponding with each transmitter Signal carries out symbol level decoding process；Receiver use bit level processor corresponding with each transmitter is to symbol level solution Code treated data carry out bit-level decoding process.
Further, in step 202 receiver according to bit level processor corresponding with each transmitter and symbol level The mode that processor is decoded signal, including following (A, B, C) any case：
A, receiver is respectively according to identical symbol level processor corresponding with each transmitter and mutually different bit Level processor carries out symbol level decoding process and bit-level decoding process to signal.
For the embodiment of the present invention, if signal comes from each transmitter respectively according to different for what receiver received Bit level processor to sent data carry out bit-level processing, using symbol level processor carry out symbol level processing after Obtained signal, then receiver the decoded data of symbol level processor are compared according to mutually different bit level processor Superfine decoding process.
B, receiver is according at mutually different symbol level processor corresponding with each transmitter and identical bit-level It manages device and symbol level decoding process and bit-level decoding process is carried out to signal.
For the embodiment of the present invention, if signal comes from each transmitter respectively according to different for what receiver received The superfine processor processing of symbol level processor comparison after data carry out the signal obtained after symbol level processing, then receiver foundation Mutually different symbol level processor carries out symbol level decoding process to signal.
C, receiver is according to mutually different symbol level processor corresponding with each transmitter and bit level processor Combination carries out symbol level decoding process and bit-level decoding process to signal.
For the embodiment of the present invention, if signal comes from each transmitter respectively according to different for what receiver received Bit level processor and the combination of symbol level processor carry out bit-level processing and symbol level to sent data and handle The signal obtained afterwards, then receiver according to mutually different bit level processor and symbol level processor combination to signal into Row symbol level decoding process and bit-level decoding process.
Further, receiver is respectively according to mutually different bit level processor corresponding with each transmitter and symbol The combination of level processor carries out the multiple data obtained after symbol level decoding process and bit-level decoding process mutually not to signal It is identical.
Wherein, the combination of the mutually different bit level processor and symbol level processor, including following (D, E, F) appoint One combination：
D, bit level processor is identical and symbol level processor is different.
E, bit level processor is different and symbol level processor is identical.
F, bit level processor and symbol level processor are all different.
Further, receiver bit level processor carry out bit-level decoding process by way of, including it is following (G, H, I) any case：
G, receiver is deinterleaved processing by bit-level interleaver.
H, receiver carries out solution scrambling processing by bit-level scrambler.
I, receiver carries out despreading processing by bit-level spreader.
Further, receiver symbol level processor carry out symbol level decoding process by way of, including it is following (J, K, L, M) any case：
J, receiver carries out symbol level by multiple spreading code and despreads processing.
K, receiver carries out symbol level by multiple spreading code, symbol level interleaver respectively and despreads processing and symbol level solution Interleaving treatment.
L, receiver carries out symbol level descrambling code processing by symbol level scramble sequence.
M, receiver carries out symbol level by multiple spreading code, symbol level scramble sequence respectively and despreads processing and symbol level Descrambling code processing.
Further, what signal can also receive for receiver is respectively handled it from each transmitter through symbol level Data afterwards carry out carrier modulation, and the signal to being obtained after modulated data progress base band to the conversion process of radio frequency.
Wherein, the mode of carrier modulation treatment includes following any modulation system：Single-carrier modulated processing；Multicarrier tune System processing.
Wherein, single-carrier modulated processing mode includes at least：The OFDM modulation of discrete Fourier transform extension Mode.
Wherein, multi-carrier modulation processing mode includes at least following at least one：The modulation system of orthogonal frequency division multiplexing, base In multi-carrier modulation, the continuous orthogonal frequency division multiplexing tune of N ranks that OFDM modulation mode, the broad sense of filtering filter Mode processed and filter bank multi-carrier modulation system.
Further, receiver receives the signal from same transmitter, wherein signal is multiple numbers of same transmitter It is obtained after bit-level processing and symbol level processing respectively according to stream；Receiver is according to bit-level corresponding with each data flow Processor and symbol level processor decode signal to obtain multiple data flows from same transmitter.
Further, if multiple data flows that the signal that receiver receives is same transmitter use mutually different ratio Superfine processor is handled by bit-level, and obtained after the processing of symbol level processor, then receiver is according to different Bit level processor to after symbol level decoding process data carry out bit-level decoding process.
Further, if the signal that receives of receiver is multiple data flows of same transmitter after bit-level is handled Data obtained after symbol level is handled using mutually different symbol level processor, then receiver is according to mutually different The signal that the docking of symbol level processor receives carries out symbol level decoding process.
Further, if multiple data flows that the signal that receiver receives is same transmitter use mutually different ratio The combination of superfine processor and symbol level processor obtains after bit-level processing and symbol level processing, then receiver according to Symbol level decoding process is carried out to the signal received according to the combination of mutually different bit level processor and symbol level processor And bit-level decoding process.
Further, if receiver according to mutually different bit level processor to the symbol level solution from multiple transmitters When code treated data carry out bit-level decoding process, then receiver is same to coming from according to mutually different symbol level processor The signal of multiple data flows of one transmitter carries out symbol level decoding process.
Further, if receiver carries out the signal from multiple transmitters according to mutually different symbol level processor When symbol level decoding process, then receiver according to mutually different bit level processor to multiple data from same transmitter The data after symbol level decoding process of stream carry out bit-level decoding process.
Further, receiver according to the combination of mutually different bit level processor and symbol level processor to coming from not Signal with multiple data flows of transmitter carries out symbol level decoding process and bit-level decoding process.
An embodiment of the present invention provides the methods of another multiple access access, with existing orthogonal access mode phase Than, in the embodiment of the present invention receiver by mutually different symbol level processor and/or bit level processor to receiving Data are decoded processing, can distinguish the data of different transmitters transmitting, and will not be limited by orthogonal resource, Further transmitter is handled data by bit level processor and symbol level processor, is conducive to multiple transmitters It can be in identical running time-frequency resource transmitting data, so that receiver can receive the upper of multiple transmitters transmissions simultaneously Row data, be conducive to identical running time-frequency resource being multiplexed increase to multiple transmitters can service-transmitter quantity, and then can be with Further improve the quantity of receiver service user.
Fig. 3 is a kind of principle schematic of the transmitter based on bit-level processing and symbol level processing.As shown in figure 3, this Inventive embodiments propose a kind of transmitter based on bit-level processing and symbol level processing.First, to information bit sequence dk= {dk(m), m=0 ..., M-1 } (wherein M is information bit sequence length) progress channel coding.It wherein, can be in channel coding It is R by a code check1Component code (such as Turbo code and LDPC code) constitute, or combine structure together by multiple component codes At, such as a code check is R1Turbo code and code check be R2Repetition spreading code combine and generate lower encoder bit rate R3=R2R1, or by a code check be R3Turbo code directly constitute.Information bit sequence dkCode sequence is obtained by channel coding Arrange ck={ ck(n), n=0 ..., N-1 } (wherein N is the length of sequence after channel coding).Then by coded sequence ckPass through ratio Superfine processor αkSequence x after being handledk={ xk(n), n=0 ..., N-1 }.
Wherein, bit-level processing may include following either type：
1. bit-level interleaving treatment, wherein bit level processor be bit-level interleaver (also referred to as bit-level interleaved sequence, Or bit-level intertexture pattern).In embodiments of the present invention, the length of sequence keeps one with the sequence length to interweave is sent into after intertexture It causes, by intertexture so that the correlation of adjacent chip is reduced, is conducive to detect by chip in receiver.
For the embodiment of the present invention, bit-level interleaver αkCan be that generation is upset by { 0,1 ..., N } at random.? In the embodiment of the present invention sequence of positions shared by bit is indicated with 0 to N numerical value.
2. bit-level scrambler handle, wherein bit level processor be bit-level scrambler (also referred to as bit-level scrambler sequence, Or bit-level scrambler pattern).In embodiments of the present invention, the length of sequence is kept with the sequence length before being scrambled after scrambling Unanimously, to make the correlation of adjacent chip reduce by scrambling, be conducive to detect by chip in receiver.
3. bit-level is spread, wherein bit level processor is bit-level spreader (also referred to as bit-level interleaved sequence, or ratio Superfine intertexture pattern).Specifically, spread spectrum can be repeated to the bit after coding, or according to given frequency expansion sequence Carry out spread spectrum operation.
For the embodiment of the present invention, the code check of data can be further decreased by above-mentioned bit-level spread processing, increased The reliability of data transmission.
For the embodiment of the present invention, sequence after the processing of obtained bit-level is subjected to bit to symbol-modulated and generates symbol sequence Arrange Sk={ Sk(l), l=0 ..., L-1 } (wherein L is the length of symbol sebolic addressing, is handled with the modulation system and bit-level used The length of sequence is related afterwards).Wherein, modulation system can be quadrature amplitude modulation (full name in English：Quadrature Amplitude Modulation, english abbreviation：QAM), phase-shift keying (PSK) (full name in English：Phase Shift Keying, English Abbreviation：PSK) planispheres modulation or the frequency shift keying (full name in English such as：Frequency Shift Keying, english abbreviation： The waveform modulateds etc. such as FSK), then this symbol sebolic addressing SkHandle to obtain treated symbol sebolic addressing using symbol level, wherein should Symbol level processing may include following any processing mode：
1. symbol level is spread, multiple spreading code (full name in English is used：complex spreading code/ sequence).In embodiments of the present invention, symbol sebolic addressing SkIt can be obtained after using multiple spreading code to spread equivalent lower System coding code check, so as to improve the reliability of data transmission；Further use low related/orthogonal multiple spread spectrum Code, while the correlation of different user data can also be reduced, help the detection of receiving terminal to decode.
For the embodiment of the present invention, multiple spreading code can also have sparsity, i.e., can have symbol 0 on frequency expansion sequence again.
Interweave with symbol level 2. symbol level is spread, by being carried out on the symbol sebolic addressing that above-mentioned symbol level spread spectrum operation generates Symbol level interweaves, further such that intersymbol correlation reduces, can help to mitigate inter-cell interference, help the inspection of receiving terminal Decoding is surveyed, user is distinguished.
It is worth noting that, the spread spectrum of symbol level can in turn, i.e., first to symbol sebolic addressing S with intertexture operation orderkInto Row symbol level interweaves, and the symbol sebolic addressing after intertexture is carried out symbol level spread spectrum.
3. symbol level scrambler, specially to symbol sebolic addressing SkCarry out symbol level scrambler (full name in English：symbol level scrambling).In embodiments of the present invention, intersymbol correlation can be mitigated by symbol level scrambler, helps receiving terminal Detection decoding, while can also help to mitigate the interference of minizone.
4. symbol level is spread and symbol level scrambler, specially enterprising in the symbol sebolic addressing of above-mentioned symbol level spread spectrum operation generation Row symbol level scrambling.In embodiments of the present invention, it is spread with symbol level scrambler further such that intersymbol phase by symbol level Closing property reduces, and can help to mitigate inter-cell interference, the detection of receiving terminal is helped to decode, and distinguishes user.
It is worth noting that, the spread spectrum of symbol level can in turn, i.e., first to symbol sebolic addressing S with Scrambling Operation sequencekInto Symbol sebolic addressing after scrambling is carried out symbol level spread spectrum by row symbol level scrambling.
For the embodiment of the present invention, (such as symbol level answers spreading code to the processor used in symbol level processing, and symbol level interweaves Sequence, symbol level scrambler etc.) it is expressed as βk.In embodiments of the present invention, after symbol level is handled, user information will be carried Symbol is sparsely mapped on the running time-frequency resource of distribution, is conducive to anti-interference and decline, and be conducive in identical time-frequency More users are supported in resource.Base band then is carried out to operations such as radio frequency processings to the data sequence of generation, is finally launched It goes.
For the embodiment of the present invention, provided herein on the basis of transmitter as shown in Figure 3, in the embodiment of the present invention a kind of Novel access mode based on bit-level processing with symbol level processing.As shown in figure 4, K transmitter is believed from physical broadcast Road, Physical Downlink Control Channel or Physical Downlink Shared Channel obtain respective bit level processor and symbol level processor letter Breath.
Wherein, bit level processor information and symbol level processor information are respectively used to processing used in indication bit grade Processor used in device and symbol level can be indicated by modes such as tables.In embodiments of the present invention, bit level processor And/or symbol level processor is the unique mark that receiver distinguishes different user.
For the embodiment of the present invention, K transmitter sends signal by way of above-mentioned transmitter, by respective channel hk, it is combined together in receiver, and interfered by noise.Receiver uses multi-user's iterative detection.
Specifically, the signal received is subjected to radio frequency to Base-Band Processing, then using obtained signal as base band first It receives signal and is sent to multi-user detector.Wherein, multi-user detector is generated according to baseband receiving signals and previous iteration The priori probability information of each bit calculates the posterior probability information of each bit or each symbol, and combines input detector Priori probability information calculate external information (full name in English：Extrinsic Information), the then symbol according to each user Number level processor βkTo detector output external information carry out inversely processing, if for example, symbol level processing be symbol level scrambling, it is inverse Processing is symbol level descrambling, and the Soft Inform ation sequence recovered at this time is then sent to the corresponding bit level processor of user αkInversely processing is carried out, if for example, bit-level processing is bit-level intertexture, inversely processing is that bit-level deinterleaves, then will be inverse Treated, and Soft Inform ation inputs decoder.Wherein, in a decoder, the component code that is used according to transmitter is solved accordingly Code, and adjudicate and obtain user data.
Further, for next iterative detection, the Soft Inform ation that decoding obtains is again passed by identical with transmitter Channel coding, and the Soft Inform ation of oneself obtains external information before subtracting, and obtained external information is then passed through bit level processor αkAgain it handles, then handles using symbol level and handle again, finally obtained external information sequence is as priori probability information Multi-user detector is inputted, so far, an iteration detection is completed, and is repeated aforesaid operations and is carried out next iteration detection decoding.On Be probabilistic information in the information that iterative detection and decoding transmits during stating, i.e., the probability or symbol value that bit is 0 or 1 Probability, this category information is referred to as Soft Inform ation.It is real to simplify Soft Inform ation can be indicated using log-likelihood ratio or log probability Now operate.When first time iteration, without priori probability information, therefore the prior probability of multi-user detector is inputted as equiprobability point Cloth；Successive iterations are being translated using the newer priori probability information of last iteration when iterations reach preset maximum value Hard decision, which is carried out, in code device obtains the message data result of end user.Wherein, above-mentioned multiuser signal detector can make With cell signal estimator (full name in English：Elementary Signal Estimator, english abbreviation：ESE), or based on disappearing Cease pass-algorithm (full name in English：Massage Passing Algorithm, english abbreviation：MPA), serial interference elimination (English Full name：Successive Interference Cancellation, english abbreviation：SIC detector etc.).
In first specific embodiment of the present invention, will be specifically introduced in the present embodiment based on bit-level processing and symbol The access mode that grade is spread again.As shown in figure 5, the embodiment of the present invention is introduced, one kind is handled based on bit-level and symbol level is multiple The transmitter principle schematic block diagram of spread spectrum.First to information bit sequence dk={ dk(m), m=0 ..., M-1 } (wherein M is information Bit sequence length) carry out channel coding.Wherein, can be R by a code check in channel coding1Component code (Turbo code, Low-density checksum (full name in English：Low Density Parity Check, english abbreviation：LDPC) code etc.) it constitutes, or It is combined and is constituted together by multiple component codes, such as a code check is R1Turbo code and code check be R2Repetition spreading code combine one It rises and generates lower encoder bit rate R3=R2R1, or by a code check be R3Turbo code directly constitute；Then information bit sequence Arrange dkCoded sequence c is obtained by channel codingk={ ck(n), n=0 ..., N-1 } (wherein N is the length of sequence after channel coding Degree)；Then by coded sequence ckPass through bit level processor αkSequence x after being handledk={ xk(n), n= 0,…,Nb-1}。
Wherein, bit-level processing may include any one of following：
1. bit-level interweaves, wherein bit level processor used in bit-level intertexture is that bit-level interleaver (is also referred to as Bit-level interleaved sequence or bit-level intertexture pattern).In embodiments of the present invention, interweaved by bit-level, sequence after intertexture Length is consistent with the sequence length to interweave is sent into, i.e. Nb=N.
For the embodiment of the present invention, by intertexture so that the correlation of adjacent chip is reduced, be conducive to receiver by Chip detects.
For the embodiment of the present invention, bit-level interleaver αkCan be that generation is upset by { 0,1 ... ..., N-1 } at random, In embodiments of the present invention the sequence of positions shared by bit is indicated with 0 to N numerical value.For example, it is assumed that N=504, bit-level is handed over It is α to knit sequencek={ 4,503 ... ..., 52 }, then can obtain xk(0)=ck(4),xk(1)=ck(503),……,xk(503) =ck(52), as shown in Figure 6.
2. bit-level scrambler, bit level processor used in bit-level scrambler is bit-level scrambler (also referred to as bit Grade scrambler sequence or bit-level scrambler pattern)；Wherein, the length of sequence is kept with the sequence length before being scrambled after scrambling Unanimously, i.e. Nb=N.
1. for the embodiment of the present invention, by scrambling so that the correlation of adjacent chip is reduced, be conducive in receiver It is detected by chip.For example, it is assumed that N=504, bit-level scrambler sequence is αk={ 0,1,1,0 ..., 1 }, the then sequence after scrambler Its InIndicate that the mould N of x and y adds operation, such as mould 2 plus operation.
3. bit-level is spread, wherein bit level processor is bit-level spreader (also referred to as bit-level interleaved sequence, or ratio Superfine intertexture pattern), and the length of sequence and the sequence length before being spread are generally different after spread spectrum.Assuming that bit-level expands Frequency sequence αkLength be Nα, Nα>=1, then Nb=N*Nα.Wherein, above-mentioned bit-level spread spectrum can be carried out to the bit after coding It repeats, or spread spectrum operation is carried out according to given frequency expansion sequence.
For the embodiment of the present invention, the code check of data can be further decreased by bit-level spread spectrum, increases data transmission Reliability.
Further, sequence after the processing of obtained bit-level is carried out bit to symbol-modulated and generates symbol sebolic addressing by transmitter Sk={ Sk(l), l=0 ..., L-1 } (wherein L is the length of symbol sebolic addressing, after being handled with the modulation system and bit-level used The length of sequence is related), wherein modulation system can be waveform modulateds such as the modulation of the planispheres such as QAM, PSK or FSK etc.；So This symbol sebolic addressing S afterwardskSymbol sebolic addressing after being spread again using symbol level；Wherein, symbol level spread spectrum uses Multiple spreading code.In embodiments of the present invention, symbol sebolic addressing SkIt can be obtained after using multiple spreading code to spread equivalent lower System coding code check, the reliability of data transmission is improved, if further using low related/orthogonal multiple spreading code, simultaneously The correlation that different user data can also be reduced helps the detection of receiving terminal to decode.
Further, the symbol level that symbol level uses in spreading again answers frequency expansion sequence and is expressed as βk, wherein symbol level expands again The length of frequency sequence is Ncs, in embodiments of the present invention, if Ncs=4, then βk={ akr1+aki1* j, akr2+aki2* j, akr3+aki3* J, akr4+aki4* j }, what wherein j was represented isakr1, akr2, akr3, akr4That represent is real part, aki1, aki2, aki3, aki4Generation Table is imaginary part；Symbol sebolic addressing SkIn each symbol will be with βkThe symbol sebolic addressing being multiplied after obtaining multiple spread spectrum, i.e., multiple spread spectrum Symbol sebolic addressing P afterwardsk={ Pk(b), b=0 ..., B-1 } (wherein B is the length of symbol sebolic addressing after multiple spread spectrum, before multiple spread spectrum Sequence length L is related with the multiple length of frequency expansion sequence, such as B=L*Ncs) as shown in Figure 7.
Further, multiple spreading code can also have sparsity, i.e., can have symbol 0 on frequency expansion sequence again.Specifically, if Symbol level answers frequency expansion sequence and is expressed as βk, length Ncs=4, then βk={ akr1+aki1* j, 0, akr3+aki3* j, 0 }, using with Identical, the i.e. symbol sebolic addressing S of the processing mode of the multiple spreading code of sparsity and common multiple spreading codekIn each symbol It wants and βkThe symbol sebolic addressing being multiplied after obtaining multiple spread spectrum, the symbol sebolic addressing P after spreading againk={ Pk(b), b=0 ..., B-1 } (its Middle B is the length of symbol sebolic addressing after multiple spread spectrum, with before multiple spread spectrum sequence length L and to answer the length of frequency expansion sequence related, such as B= L*Ncs), wherein the P unlike common multiple spreading codek0 value symbol is had, as shown in Figure 8.
Further, after symbol level is spread, the symbol for carrying user information is mapped on the running time-frequency resource of distribution, Further the symbol for carrying user information can be sparsely mapped on the running time-frequency resource of distribution, be conducive to anti-interference And decline, and be conducive to support more users on identical running time-frequency resource, base then is carried out to the data sequence of generation It takes the operations such as radio frequency processing to, finally launches.
For the embodiment of the present invention, on the basis of transmitter as shown in Figure 5, the embodiment of the present invention provides one kind and is based on The novel access mode of bit-level processing and symbol level processing.As shown in figure 9, K transmitter is from Physical Broadcast Channel, object Reason down control channel or Physical Downlink Shared Channel obtain respective bit level processor and symbol level answers frequency expansion sequence letter Breath, wherein bit level processor information and symbol level answer frequency expansion sequence information and be respectively used to processing used in indication bit grade Multiple frequency expansion sequence used in device and symbol level spreads sequence used in processor and symbol level used in bit-level again Row can obtain by searching for modes such as tables.It is that receiver distinguishes different use that bit level processor and/or symbol level, which answer frequency expansion sequence, The unique mark at family.The mode for distinguishing user may include any one of following：
1. if only distinguished by bit level processor difference, at least share the bit-level of the user of identical running time-frequency resource Processor is different, and answering spreading code to symbol level does not require.
2. if only answer spreading code by symbol level to distinguish, the symbol level at least sharing the user of identical running time-frequency resource is multiple Spreading code is different, and is not required bit level processor.
3. if distinguished by the combination of bit level processor and symbol level spreading code, at least share identical running time-frequency resource The bit level processor of user answer the combination of spreading code with symbol level and be different.
Wherein, the combination that different bit level processors answers spreading code with symbol level refers to that identical data (sequence) pass through Different bit level processors is answered the symbol sebolic addressing that the combination of spreading code obtains with symbol level and is differed.
For the embodiment of the present invention, K transmitter sends signal by way of above-mentioned transmitter, by respective channel hk, it is combined together in receiver, and interfered by noise.Wherein, receiver uses multi-user's iterative detection.Specifically first The signal received is subjected to radio frequency to Base-Band Processing, is then sent to multi-user's inspection using obtained signal as baseband receiving signals Survey device.The priori probability information meter for each bit that wherein multi-user detector is generated according to baseband receiving signals and previous iteration The posterior probability information of each bit or each symbol is calculated, and the priori probability information of input detector is combined to calculate external information (full name in English：Extrinsic Information).Symbol level spreading code β of the receiver according to each user laterkTo detection The external information of device output carries out demultiplexing spread spectrum, and the Soft Inform ation sequence recovered at this time is specifically sent to the corresponding ratio of user Superfine processor αkInversely processing is carried out, if for example, bit-level processing is bit-level intertexture, inversely processing is that bit-level solution is handed over It knits.Soft Inform ation after inversely processing inputs decoder later, specifically in a decoder, the component code used according to transmitter come into The corresponding decoding of row, terminal decision obtain user data.
For the embodiment of the present invention, for next iterative detection, the Soft Inform ation that decoding obtains is again passed by and emitted The identical channel coding of machine, and the Soft Inform ation of oneself obtains external information before subtracting, and obtained external information is passed through into bit-level Processor αkAgain it handles, then spreads using symbol level and spread again again again, finally obtained external information sequence is as first Probabilistic information input multi-user detector is tested, so far, an iteration detection is completed, and is repeated aforesaid operations and is carried out next iteration inspection Survey decoding.In embodiments of the present invention, in the above process, it is probabilistic information in the information that iterative detection and decoding transmits, that is, compares The probability of probability or symbol value specially for 0 or 1, is referred to as Soft Inform ation by this category information.Can use log-likelihood ratio or Log probability indicates that Soft Inform ation realizes operation to simplify.Wherein, it when first time iteration, without priori probability information, therefore inputs The prior probability of multi-user detector is equal-probability distribution；Successive iterations use the newer priori probability information of last iteration, When iterations reach preset maximum value, hard decision is carried out in a decoder and obtains the message data result of end user. Above-mentioned multiuser signal detector can use the detector etc. of ESE or MPA, SIC.
Second specific embodiment of the embodiment of the present invention, the present embodiment will be introduced based on bit-level processing and symbol level The mode of the access mode of processing, wherein symbol level processing is that symbol level answers spread processing and symbol level interleaving treatment.
The present embodiment is introduced a kind of spread again based on bit-level processing and symbol level and illustrated with the principle of the transmitter to interweave Block diagram, as shown in Figure 10.First, transmitter is to information bit sequence dk={ dk(m), m=0 ..., M-1 } (wherein M is information ratio Special sequence length) channel coding is carried out, can be R by a code check in channel coding1Component code (Turbo code, LDPC code Deng) constitute, or combined and constituted together by multiple component codes, such as a code check is R1Turbo code and code check be R2Repetition expand Frequency code, which is combined, generates lower encoder bit rate R3=R2R1, or by a code check be R3Turbo code directly constitute.Tool Body, information bit sequence dkCoded sequence c is obtained by channel codingk={ ck(n), n=0 ..., N-1 } (wherein N is channel The length of sequence after coding), then by coded sequence ckPass through bit level processor αkSequence x after being handledk= {xk(n), n=0 ..., Nb-1}。
Wherein, bit-level processing may include any one of following：
1. bit-level interleaving treatment, if bit-level processing is bit-level interleaving treatment, bit level processor is bit-level Interleaver (also referred to as bit-level interleaved sequence or bit-level intertexture pattern)；The length of sequence interweaves with feeding after wherein interweaving Sequence length be consistent, i.e. Nb=N.In embodiments of the present invention, by intertexture so that the correlation of adjacent chip subtracts It is few, be conducive to detect by chip in receiver.Bit-level interleaver αkCan be that generation is upset by { 0,1 ..., N-1 } at random , in the present invention in embodiment, the sequence of positions shared by bit is indicated with 0 to N numerical value.For example, N=504, bit-level Interleaved sequence is αk={ 4,503 ... ..., 52 }, then the sequence after interleaving treatment can be xk(0)=ck(4),xk(1)=ck (503),……,xk(503)=ck(52), as shown in Figure 6.
2. bit-level scrambler is handled if bit-level processing is bit-level scrambler, bit level processor is bit-level scrambler Device (also referred to as bit-level scrambler sequence or bit-level scrambler pattern)；Wherein, the length of sequence and before being scrambled after scrambling Sequence length is consistent, i.e. Nb=N.In embodiments of the present invention, by scrambling the correlation of adjacent chip is reduced, Be conducive to detect by chip in receiver.For example, N=504, bit-level scrambler sequence is αk={ 0,1,1,0 ..., 1 }, then may be used It is to obtain the sequence after scrambler WhereinIndicate that the mould N of x and y adds operation, such as mould 2 plus operation.
3. bit-level is spread, if bit-level processing is bit-level spread processing, bit level processor spreads for bit-level Device (also referred to as bit-level interleaved sequence or bit-level intertexture pattern)；Wherein, the length of sequence and before being spread after spread spectrum Sequence length is generally different, and assumes bit-level spreading sequence αkLength be Nα, Nα>=1, then Nb=N*Nα.Implement in the present invention In example, bit-level spread spectrum can be repeated to the bit after coding, or carry out spread spectrum behaviour according to given frequency expansion sequence Make, the code check of data can be further decreased, increase the reliability of data transmission.
For the embodiment of the present invention, sequence after the processing of obtained bit-level is carried out bit to symbol-modulated and generated by transmitter Symbol sebolic addressing Sk={ Sk(l), l=0 ..., L-1 } (wherein L is the length of symbol sebolic addressing, with the modulation system and bit-level used The length of the rear sequence of processing is related), then this symbol sebolic addressing SkSymbol sequence after being spread again using symbol level Row.
Wherein, modulation system can be the modulation of the planispheres such as QAM, PSK, and including multi-dimensional constellation diagram modulation, (English is complete Claim：Multi-dimensional constellation modulation) or the waveform modulateds such as FSK etc..
Wherein, the symbol level spread spectrum, uses multiple spreading code.In embodiments of the present invention, symbol sebolic addressing SkBy Equivalent lower system coding code check can be obtained after being spread using multiple spreading code, improves the reliability of data transmission.Into one Step ground, if low related/orthogonal multiple spreading code that symbol level spread spectrum uses, while the correlation of different user data can also be reduced Property, help the detection of receiving terminal to decode.
Wherein, the symbol level that symbol level uses in spreading again answers frequency expansion sequence and is expressed as βk-cs, symbol level answers frequency expansion sequence Length be NcsIf Ncs=4, then βk-cs={ akr1+aki1* j, akr2+aki2* j, akr3+aki3* j, akr4+aki4* j }, wherein j generations Table isakr1, akr2, akr3, akr4That represent is real part, aki1, aki2, aki3, aki4What is represented is imaginary part.Symbol sebolic addressing SkIn each symbol will be with βkThe symbol sebolic addressing being multiplied after obtaining multiple spread spectrum, i.e., the symbol sebolic addressing P after spread spectrum againk={ Pk (b), b=0 ..., B-1 } (wherein B is the length of symbol sebolic addressing after multiple spread spectrum, with before multiple spread spectrum sequence length L and multiple spread spectrum The length of sequence is related, such as B=L*Ncs)。
Further, multiple spreading code can also have sparsity, i.e., can have symbol 0 on frequency expansion sequence again.Similarly, it accords with Number grade answers frequency expansion sequence and is expressed as βk, length Ncs=4, then βk-cs={ akr1+aki1* j, 0, akr3+aki3* j, 0 }, using with The processing mode of the multiple spreading code of sparsity is identical as common multiple spreading code, that is, is symbol sebolic addressing SkIn each symbol It number will be with βkThe symbol sebolic addressing being multiplied after obtaining multiple spread spectrum, i.e., the symbol sebolic addressing P after spread spectrum againk={ pk(b), b=0 ..., B- 1 } (wherein B is the length of symbol sebolic addressing after multiple spread spectrum, with before multiple spread spectrum sequence length L and to answer the length of frequency expansion sequence related, Such as B=L*Ncs), P unlike two kinds of processing modeskHave 0 value symbol.
For the embodiment of the present invention, transmitter is by the symbol sebolic addressing P after multiple spread spectrumkSymbol level interleaving treatment is carried out to obtain Symbol sebolic addressing Q after intertexturek={ Qk(t), t=0 ..., T-1 }, the operation that symbol level interweaves can have following possible situation：
1. directly interweaving.The length of symbol sebolic addressing and the sequence length before intertexture are consistent after intertexture, i.e. T=B.Its Middle symbol level interleaver βk-itIt can be that generation is upset by { 0,1 ... ..., T-1 } at random, be arrived in embodiments of the present invention with 0 The numerical value of T-1 indicates the sequence of positions shared by symbol.As shown in figure 11, the symbol sebolic addressing that length is 8 is 4 using length After multiple frequency expansion sequence progress symbol level answers spread spectrum operation, length becomes 32, reuses the interleaver that length is 32, such as βk-it= { 15,31,9 ... 3 }, then according to the sequence of interleaver by sequence reorganization in the sequence after interweaving.
For the embodiment of the present invention, by interweaving so that the reduction of intersymbol correlation, is conducive in receiver by chip Detection.
2. zero padding interweaves.Sequence after multiple spread spectrum is subjected to part benefit and fills out valued symbols (assuming that the valued symbols of supplement There is N0It is a), supplement valued symbols can allow symbol sebolic addressing to have sparsity, be conducive to receiving terminal detection decoding.Symbol after intertexture The length of sequence and the sequence length after zero padding are consistent, that is, the symbol lengths after interweaving are length and supplement before zero padding The sum of number of valued symbols, T=B+N0.Wherein, symbol level interleaver βk-itCan be upset at random by { 0,1 ..., T-1 } It generates, in embodiments of the present invention, the sequence of positions shared by symbol is indicated with 0 to T-1 numerical value.As shown in figure 12, long Degree is 8 symbol sebolic addressing, and after the multiple frequency expansion sequence progress symbol level for the use of length being 2 answers spread spectrum operation, length becomes 16, then mends It fills 16 valued symbols and becomes the symbol sebolic addressing that length is 32, length is 32 interleavers, such as β when in usek-it=15, 31,9 ... 3 }, then according to the sequence of interleaver by sequence reorganization in the sequence after interweaving.
For the embodiment of the present invention, by interweaving so that the reduction of intersymbol correlation, is conducive in receiver by chip Detection.
3. direct zero insertion.By the sequence after multiple spread spectrum according to zero insertion pattern by N0After a valued symbols are inserted into multiple spread spectrum In sequence, the valued symbols of insertion can allow symbol sebolic addressing to have sparsity, be conducive to receiving terminal detection decoding, the sum of zero insertion The length of symbol sebolic addressing is the sum of the number of valued symbols of symbol sebolic addressing length and insertion before zero insertion, T=B+N0.Wherein, it inserts Null graph sample βkThe number for defining zero valued elements and the position where zero valued elements.For example, βk={ 3,5,8,10 } demonstrate the need for 4 valued symbols are inserted into, and this four valued symbols shared location index in final symbol sebolic addressing is 3,5,8,10.Such as figure Shown in 13, the symbol sebolic addressing that length is 8, after answering spread spectrum operation using length for 2 multiple frequency expansion sequence progress symbol level, length becomes It is 16, according still further to zero insertion pattern βkIt is 20 that={ 3,5,8,10 }, which are inserted into 4 valued symbols to become length in symbol sebolic addressing, Symbol sebolic addressing.
4. intertexture zero insertion.By the sequence after multiple spread spectrum according to intertexture pattern βk-itIt carries out symbol level intertexture to operate, after intertexture The length of symbol sebolic addressing and the sequence length after zero padding are consistent, and by interweaving so that intersymbol correlation is reduced, are had It is detected by chip conducive in receiver.Wherein, symbol level interleaver βk-itCan be that production is upset by { 0,1 ..., B-1 } at random It is raw, in embodiments of the present invention, the sequence of positions shared by symbol is indicated with 0 to B-1 numerical value, then by the symbol after intertexture Sequence is according to zero insertion pattern βk0, the valued symbols of insertion can allow symbol sebolic addressing to have sparsity, be conducive to receiving terminal detection solution Yard, the length of the symbol sebolic addressing after zero insertion is the sum of the number of valued symbols of symbol sebolic addressing length and insertion before zero insertion, T= B+N0.Wherein zero insertion pattern βk0The number for defining zero valued elements and the position where zero valued elements, for example, βk0=3,5, 8,10 } it then demonstrates the need for being inserted into 4 valued symbols, and this four valued symbols shared location index in final symbol sebolic addressing It is 3,5,8,10.It is worth noting that, location index at this time is not in accordance with initial location index.
It can be interchanged with the operation order of zero insertion it is worth noting that, interweaving, you can zero insertion is carried out again to be first interleaved, Or zero insertion is first carried out, it is being interleaved operation.As shown in figure 14, the symbol sebolic addressing that length is 8, the multiple expansion for the use of length being 2 After frequency sequence progress symbol level answers spread spectrum operation, length becomes 16, according still further to intertexture pattern βk-it={ 14,3,9,0 ... 2,1 } By symbol into rearrangement, then by the symbol sebolic addressing after intertexture according to zero insertion pattern βk4 valued symbols are inserted into in={ 3,5,8,10 } Become the symbol sebolic addressing that length is 20, ensure after zero insertion in the sequence number sequence generated, is valued symbols in the 3rd, 5,8,10.
It is worth noting that, the intertexture operation of the multiple spread spectrum operation and symbol level of symbol level can be interchanged, you can with advanced Then the multiple spread spectrum operation of row carries out the intertexture operation of symbol level again；Or symbol level intertexture operation is first carried out, then carry out symbol level Multiple spread spectrum operation.It does not limit in embodiments of the present invention.
For the embodiment of the present invention, the processor β of symbol levelkFor the group of symbol level frequency expansion sequence and symbol level interleaving block It closes, the individual symbol level interleaver or symbol level interleaver and/or zero insertion that wherein symbol level interleaving block can refer to Pattern etc. all uses the processor β of symbol level for convenience of describingkIt is indicated.
For the embodiment of the present invention, after symbol level is handled, by the symbol for carrying user information be mapped to distribution when Can sparsely be mapped on the running time-frequency resource of distribution distinguishingly in frequency resource, be conducive to anti-interference and decline, and Be conducive to support more users on identical running time-frequency resource.Base band then is carried out to radio frequency processing to the data sequence of generation Deng operation, finally launch.
Further, on the basis of transmitter as shown in Figure 10, the present invention provide it is a kind of based on bit-level processing with The novel access mode of symbol level processing, as shown in figure 15, K transmitter is controlled from Physical Broadcast Channel, physical down Channel or Physical Downlink Shared Channel obtain respective bit level processor and symbol level processor (multiple frequency expansion sequence and intertexture Information).Wherein, bit level processor information and symbol level answer processor (frequency expansion sequence and intertexture) information and are respectively used to instruction ratio Processor used in processor and symbol level used in superfine (multiple frequency expansion sequence and the possible interleaved sequence used And/or zero insertion pattern), processor used in processor and symbol level used in bit-level can be by searching for modes such as tables It obtains.
For the embodiment of the present invention, bit level processor and/or symbol level processor (multiple frequency expansion sequence and/or intertexture sequence Row and/or zero insertion pattern) it is the unique mark that receiver distinguishes different user.Distinguish transmitter (user) mode may include It is any one of following：
1. if only distinguished by bit level processor difference, at least share the bit-level of the user of identical running time-frequency resource Processor is different, and is not required symbol level processor.
2. if only distinguished by symbol level processor, at least share the symbol level processing of the user of identical running time-frequency resource Device is different, and is not required bit level processor.
3. if distinguished by the combination of bit level processor and symbol level processor, at least share identical running time-frequency resource The combination of bit level processor and symbol level processor of user be different.
Wherein, the combination of the different bit level processor and symbol level processor refers to that identical data (sequence) are logical The symbol sebolic addressing that the combination of different bit level processors and symbol level processor obtains is crossed to differ.
For the embodiment of the present invention, K transmitter sends signal by way of above-mentioned transmitter, by respective channel hk, it is combined together in receiver, and interfered by noise.Receiver uses multi-user's iterative detection, the letter that will first receive Number carry out radio frequency to Base-Band Processing, obtained signal is then sent to multi-user detector as baseband receiving signals.Wherein, The priori probability information for each bit that multi-user detector is generated according to baseband receiving signals and previous iteration calculates each ratio The posterior probability information of special or each symbol, and the priori probability information of input detector is combined to calculate external information (Extrinsic Information).Then according to the symbol level processor β of each userkTo the external information of detector output Inversely processing is carried out, spread spectrum is such as deinterleaved and demultiplexes.Then the Soft Inform ation sequence recovered at this time is sent to user couple The bit level processor α answeredkInversely processing is carried out, if for example, bit-level processing is bit-level intertexture, inversely processing is bit-level It deinterleaves.Then Soft Inform ation after inversely processing inputs decoder, and in a decoder, the component code used according to transmitter carries out Corresponding decoding, terminal decision obtain user data.
For the embodiment of the present invention, for next iterative detection, the Soft Inform ation that decoding obtains is again passed by and emitted The identical channel coding of machine, and the Soft Inform ation of oneself obtains external information before subtracting.By obtained external information by bit-level at Manage device αkAgain it handles, is then handled again using symbol level processor, it is such as again multiple to spread and interweave again.It finally obtains External information sequence as priori probability information input multi-user detector.So far, an iteration detection is completed, and above-mentioned behaviour is repeated Make to carry out next iteration detection decoding.In the above process, it is probabilistic information in the information that iterative detection and decoding transmits, that is, compares The probability of probability or symbol value specially for 0 or 1, is referred to as Soft Inform ation by this category information.Can use log-likelihood ratio or Log probability indicates that Soft Inform ation realizes operation to simplify.When first time iteration, without priori probability information, therefore multi-user is inputted The prior probability of detector is equal-probability distribution；Successive iterations use the newer priori probability information of last iteration.Work as iteration When number reaches preset maximum value, hard decision is carried out in a decoder and obtains the message data result of end user.Above-mentioned Multiuser signal detector can use the detector etc. of ESE or MPA or SIC.
In the third specific embodiment of the present invention, it will introduce and connect based on bit-level processing and the scrambled multiple access of symbol level Enter mode.As shown in figure 16, the embodiment of the present invention is introduced a kind of based on bit-level processing and the scrambled transmitter principle of symbol level Schematic block diagram.First, transmitter is to information bit sequence dk={ dk(m), m=0 ..., M-1 } (wherein M is information bit sequence Length) carry out channel coding.Can be R by a code check in channel coding1Component code (Turbo code, LDPC code etc.) constitute, Or combined and constituted together by multiple component codes, such as a code check is R1Turbo code and code check be R2Repetition spreading code combination Lower encoder bit rate R is generated together3=R2R1, or by a code check be R3Turbo code directly constitute.Specifically, information Bit sequence dkCoded sequence c is obtained by channel codingk={ ck(n), n=0 ..., N-1 } (wherein N is channel coding postorder The length of row), then by coded sequence ckPass through bit level processor αkSequence x after being handledk={ xk(n),n =0 ..., Nb-1}。
Wherein, the mode of bit-level processing may include any one：
1. bit-level interweaves, if bit-level processing mode is bit-level interleaving treatment, bit level processor is bit-level Interleaver (also referred to as bit-level interleaved sequence or bit-level intertexture pattern)；Wherein, the length of sequence interweaves with feeding after intertexture Sequence length be consistent, i.e. Nb=N, and by intertexture so that the correlation reduction of adjacent chip, is conducive to connecing Receipts machine is detected by chip.
Wherein, bit-level interleaver αkIt can be that generation is upset by { 0,1 ... ..., N-1 } at random, implement in the present invention In example, the sequence of positions shared by bit is indicated with 0 to N numerical value.If for example, N=504, bit-level interleaved sequence is αk= { 4,503 ... ..., 52 }, then can obtain xk(0)=ck(4),xk(1)=ck(503),……,xk(503)=ck(52), as schemed Shown in 6.
2. bit-level scrambler, if bit-level processing mode is the processing of bit-level scrambler, bit level processor is bit-level Scrambler (also referred to as bit-level scrambler sequence or bit-level scrambler pattern)；Wherein scramble after sequence length with scrambled Preceding sequence length is consistent, i.e. Nb=N.By scrambling so that the correlation of adjacent chip is reduced, be conducive to receiving Machine is detected by chip.For example, N=504, bit-level scrambler sequence is αk={ 0,1,1,0 ..., 1 }, then can obtain Wherein Indicate that the mould N of x and y adds operation, such as mould 2 plus operation.
3. bit-level is spread, if bit-level processing mode is bit-level spread processing, bit level processor is bit-level Frequency multiplier (also referred to as bit-level interleaved sequence or bit-level intertexture pattern)；Wherein, after spread spectrum the length of sequence with spread Preceding sequence length is generally different, and assumes bit-level spreading sequence αkLength be Nα, Nα>=1, then Nb=N*Nα.Then it incites somebody to action Sequence carries out bit to symbol-modulated and generates symbol sebolic addressing S after the bit-level processing arrivedk={ Sk(l), l=0 ..., L-1 } (wherein L is the length of symbol sebolic addressing, related with the length of rear sequence of modulation system and the bit-level processing used).
Wherein, above-mentioned spread spectrum can be repeated to the bit after coding, or carried out according to given frequency expansion sequence Spread spectrum operation.In embodiments of the present invention, the code check that data can be further decreased by spread spectrum, increases the reliable of data transmission Property.
Wherein, modulation system can be waveform modulateds such as the modulation of the planispheres such as QAM, PSK or FSK etc..This symbol sebolic addressing SkSymbol sebolic addressing after being scrambled using symbol level scrambling.Wherein, the symbol level scrambling, use scramble sequence/ Scrambler, symbol sebolic addressing SkBy using intersymbol correlation can be reduced after scramble sequence, helping the detection solution of receiving terminal Code.In embodiments of the present invention, the symbol level scramble sequence used in symbol level scrambling is expressed as βk, wherein symbol level scrambling sequence The length of row is Nscr, General NscrThe length of=L, i.e. Scrambling Operation not reindexing sequence, βk={ βk(nscr),nscr= 0,…,Nscr-1}.Wherein, the element β in scramble sequencek(nscr) can be：
1. can be real number.
2. can be plural number (mould for not changing former data symbol after permanent mould, i.e. Scrambling Operation)；
For the embodiment of the present invention, symbol sebolic addressing SkIn each symbol will be with βkThe symbol being multiplied after being scrambled Sequence Pk={ Pk(b), b=0 ..., B-1 } (wherein B is the length of symbol sebolic addressing after symbol level scrambling, such as B=L), Pk=Sk· βk={ Pk(0)=Sk(0)·βk(0),Pk(1)=Sk1 β k1 ... ... }, if conventional letter sequence length is 8, scramble sequence Length be also 8, the scrambling processes of symbol level be by the scramble sequence element multiplication of the corresponding position of the symbol of symbol sebolic addressing, As shown in figure 17.
For the embodiment of the present invention, after symbol level scrambling, the symbol for carrying user information can be mapped to distribution Running time-frequency resource on, it is possible to further be sparsely to be mapped on the running time-frequency resource of distribution, be conducive to anti-interference and decline It falls, and is conducive to support more users on identical running time-frequency resource, then carrying out base band to the data sequence of generation arrives The operations such as radio frequency processing, finally launch.
For the embodiment of the present invention, on the basis of transmitter as shown in figure 16, the embodiment of the present invention provides a kind of base In bit-level processing and the scrambled novel access mode of symbol level.As shown in figure 18, K transmitter is believed from physical broadcast Road, Physical Downlink Control Channel or Physical Downlink Shared Channel obtain respective bit level processor information and symbol level scrambling Sequence information, wherein bit level processor information and symbol level scramble sequence information are used to indicate processing used in bit-level Scramble sequence used in device and symbol level, and can be obtained by searching for modes such as tables.In embodiments of the present invention, than Superfine processor and/or symbol level scramble sequence are the unique marks that receiver distinguishes different user.Wherein, the side of user is distinguished Formula may include any one of following：
1. if only distinguished by bit level processor difference, at least share the bit-level of the user of identical running time-frequency resource Processor is different, and is not required to symbol level scrambled code
2. if only distinguished by symbol level scrambled code, at least share the symbol level scrambling of the user of identical running time-frequency resource Code is different, and is not required bit level processor.
3. if distinguished by the combination of bit level processor and symbol level scrambled code, at least share identical running time-frequency resource The combination of bit level processor and symbol level scrambled code of user be different.
Wherein, the combination of different bit level processors and symbol level scrambled code refers to identical data (sequence) by not The symbol sebolic addressing that the combination of same bit level processor and symbol level scrambled code obtains differs.
For the embodiment of the present invention, K transmitter sends signal by way of above-mentioned transmitter, by respective channel hk, it is combined together in receiver, and interfered by noise.Wherein receiver uses multi-user's iterative detection, specifically first The signal received is subjected to radio frequency to Base-Band Processing, is then sent to multi-user's inspection using obtained signal as baseband receiving signals Survey device.Then the priori probability information meter for each bit that multi-user detector is generated according to baseband receiving signals and previous iteration The posterior probability information of each bit or each symbol is calculated, and the priori probability information of input detector is combined to calculate outer letter Breath.Then according to the symbol level scrambled code β of each userkThe external information of detector output is descrambled.It then will be extensive at this time The Soft Inform ation sequence come of appearing again is sent to the corresponding bit level processor α of userkInversely processing is carried out, if for example, bit-level is handled Interweave for bit-level, then inversely processing is that bit-level deinterleaves.Then the Soft Inform ation after inversely processing inputs decoder.In decoder In, the component code that is used according to transmitter is decoded accordingly, and terminal decision obtains user data.
For the embodiment of the present invention, for next iterative detection, the Soft Inform ation that decoding obtains is again passed by and emitted The identical channel coding of machine, and the Soft Inform ation of oneself obtains external information before subtracting.By obtained external information by bit-level at Manage device αkAgain it handles, then using symbol level scrambling re-scrambling.Finally obtained external information sequence is as prior probability Information input multi-user detector.So far, an iteration detection is completed, and is repeated aforesaid operations progress next iteration detection and is translated Code.Be probabilistic information in the information that iterative detection and decoding transmits in the above process, i.e., the probability that bit is 0 or 1, or symbol The probability of number value, is referred to as Soft Inform ation by this category information.Can use log-likelihood ratio or log probability indicate Soft Inform ation with Simplify and realizes operation.When first time iteration, the prior probability without priori probability information, therefore input multi-user detector is etc. Probability distribution；Successive iterations use the newer priori probability information of last iteration.When iterations reach preset maximum value When, hard decision is carried out in a decoder obtains the message data result of end user.Wherein, above-mentioned multiuser signal detector The detector etc. of ESE or MPA or SIC can be used.
The 4th specific embodiment of the present invention will be introduced in this embodiment based at bit-level processing and symbol level The processing of the access mode of reason, wherein symbol level is that symbol level answers spread processing and the processing of symbol level scrambling.
As shown in figure 19, the embodiment of the present invention is introduced one kind and is spread again and scrambled hair based on bit-level processing and symbol level Penetrate machine schematic block diagram.First to information bit sequence dk={ dk(m), m=0 ..., (wherein M is information bit sequence to M-1 Length) carry out channel coding.Can be R by a code check in channel coding1Component code (Turbo code, LDPC code etc.) constitute, Or combined and constituted together by multiple component codes, such as a code check is R1Turbo code and code check be R2Repetition spreading code combination Lower encoder bit rate R is generated together3=R2R1, or by a code check be R3Turbo code directly constitute.Specifically, information Bit sequence dkCoded sequence c is obtained by channel codingk={ ck(n), n=0 ..., N-1 } (wherein N is channel coding postorder The length of row), then by coded sequence ckPass through bit level processor αkSequence x after being handledk={ xk(n),n =0 ..., Nb-1.
Wherein, the bit-level processing may include following either type：
1. bit-level interweaves, if bit-level processing is bit-level interleaving treatment, bit level processor interweaves for bit-level Device (also referred to as bit-level interleaved sequence or bit-level intertexture pattern)；The length of sequence and the sequence for being sent into intertexture after wherein interweaving Row length is consistent, i.e. Nb=N.In embodiments of the present invention, have so that the correlation of adjacent chip is reduced by intertexture It is detected by chip conducive in receiver.Bit-level interleaver αkCan be that generation is upset by { 0,1 ... ..., N-1 } at random, In the present invention in embodiment, the sequence of positions shared by bit is indicated with 0 to N numerical value.For example, N=504, bit-level interweaves Sequence is αk={ 4,503 ... ..., 52 }, then the sequence after interleaving treatment can be xk(0)=ck(4),xk(1)=ck (503),……,xk(503)=ck(52), as shown in Figure 6.
2. bit-level scrambler is handled if bit-level processing is bit-level scrambler, bit level processor is bit-level scrambler Device (also referred to as bit-level scrambler sequence or bit-level scrambler pattern)；Wherein, after scrambling the length of sequence with scrambled Preceding sequence length is consistent, i.e. Nb=N.In embodiments of the present invention, by scrambling so that the correlation of adjacent chip subtracts It is few, be conducive to detect by chip in receiver.For example, N=504, bit-level scrambler sequence is αk={ 0,1,1,0 ..., 1 }, The sequence after scrambler, which can then be obtained, is WhereinIndicate that the mould N of x and y adds operation, such as mould 2 plus operation.
3. bit-level is spread, if bit-level processing is bit-level spread processing, bit level processor spreads for bit-level Device (also referred to as bit-level interleaved sequence or bit-level intertexture pattern)；Wherein, the length of sequence and before being spread after spread spectrum Sequence length is generally different, and assumes bit-level spreading sequence αkLength be Nα, Nα>=1, then Nb=N*Nα.Implement in the present invention In example, bit-level spread spectrum can be repeated to the bit after coding, or carry out spread spectrum behaviour according to given frequency expansion sequence Make, the code check of data can be further decreased, increase the reliability of data transmission.
Further, for the embodiment of the present invention, sequence after the processing of obtained bit-level is carried out bit to symbol by transmitter Number modulation generates symbol sebolic addressing Sk={ Sk(l), l=0 ..., L-1 } (wherein L is the length of symbol sebolic addressing, with the modulation methods used The length for the rear sequence that formula and bit-level are handled is related), then this symbol sebolic addressing SkIt is spread again using symbol level Symbol sebolic addressing afterwards.
Wherein, modulation system can be the modulation of the planispheres such as QAM, PSK, including multi-dimensional constellation diagram modulation or FSK Etc. waveform modulateds etc..
Wherein, the symbol level spread spectrum, uses multiple spreading code.In embodiments of the present invention, symbol sebolic addressing SkBy Equivalent lower system coding code check can be obtained after being spread using multiple spreading code, improves the reliability of data transmission.Into one Step ground, if low related/orthogonal multiple spreading code that symbol level spread spectrum uses, while the correlation of different user data can also be reduced Property, help the detection of receiving terminal to decode.
Wherein, the symbol level that symbol level uses in spreading again answers frequency expansion sequence and is expressed as βk-cs, symbol level answers frequency expansion sequence Length be NcsIf Ncs=4, then βk-cs={ akr1+aki1* j, akr2+aki2* j, akr3+aki3* j, akr4+aki4* j }, wherein j generations Table isakr1, akr2, akr3, akr4That represent is real part, aki1, aki2, aki3, aki4What is represented is imaginary part.Symbol sebolic addressing SkIn each symbol will be with βkThe symbol sebolic addressing being multiplied after obtaining multiple spread spectrum, i.e., the symbol sebolic addressing P after spread spectrum againk={ Pk (b), b=0 ..., B-1 } (wherein B is the length of symbol sebolic addressing after multiple spread spectrum, with before multiple spread spectrum sequence length L and multiple spread spectrum The length of sequence is related, such as B=L*Ncs)。
Further, multiple spreading code can also have sparsity, i.e., can have symbol 0 on frequency expansion sequence again.If symbol level Multiple frequency expansion sequence is expressed as βk, length Ncs=4, then βk-cs={ akr1+aki1* j, 0, akr3+aki3* j, 0 }, using with sparse Property multiple spreading code processing mode it is identical as common multiple spreading code.That is symbol sebolic addressing SkIn each symbol will be with βkThe symbol sebolic addressing being multiplied after obtaining multiple spread spectrum, and answer the symbol sebolic addressing P after spread spectrumk={ Pk(b), b=0 ..., B-1 } (its Middle B is the length of symbol sebolic addressing after multiple spread spectrum, with before multiple spread spectrum sequence length L and to answer the length of frequency expansion sequence related, such as B= L*Ncs), the difference is that PkHave 0 value symbol.
For the present embodiment embodiment, by the symbol sebolic addressing P after multiple spread spectrumkProgress symbol level scrambling, which is handled, to be scrambled Symbol sebolic addressing Q afterwardsk={ Qk(t), t=0 ..., T-1 }, the symbol level scrambling uses scramble sequence/scrambler (English Full name：Scrambling sequence/code), symbol sebolic addressing PkBy intersymbol using that can be reduced after scramble sequence Correlation helps the detection of receiving terminal to decode.The symbol level scramble sequence used in symbol level scrambling is expressed as βk-scr, wherein according with The length of number level scrambling sequence is Nscr, General NscrThe length of=B, i.e. Scrambling Operation not reindexing sequence, T=B, βk={ βk (nscr),nscr=0 ..., Nscr-1}.Element β wherein in scramble sequencek(nscr) can be any one of following：
1. can be real number.
2. can be plural number (mould for not changing former data symbol after permanent mould, i.e. Scrambling Operation).
To the embodiment of the present invention, symbol sebolic addressing PkIn each symbol will be with βkThe symbol sequence being multiplied after being scrambled Arrange Qk={ Qk(t), t=0 ..., T-1 } (wherein T is the length of symbol sebolic addressing after symbol level scrambling, such as T=B).Wherein, if symbol Number sequence length is 4, and the length of multiple frequency expansion sequence is 2, then the symbol sebolic addressing length after multiple spread spectrum is 8, scramble sequence Length is also 8, and the scrambling processes of symbol level are by the scramble sequence element multiplication of the corresponding position of the symbol of symbol sebolic addressing, such as Shown in Figure 20.
It is worth noting that, the multiple spread spectrum operation of symbol level and the Scrambling Operation of symbol level can be interchanged, you can with advanced The multiple spread spectrum operation of row, then carries out the Scrambling Operation of symbol level again；Or symbol level Scrambling Operation is first carried out, then carry out symbol level Multiple spread spectrum operation.It does not limit in embodiments of the present invention.In embodiments of the present invention, the processor β of symbol levelkFor symbol The combination of grade frequency expansion sequence and symbol level scramble sequence.
For the embodiment of the present invention, after being handled by symbol level, the symbol for carrying user information can be mapped to point It can be further sparsely to be mapped on the running time-frequency resource of distribution on the running time-frequency resource matched, be conducive to anti-interference and decline It falls, and is conducive to support more users on identical running time-frequency resource.The data that then symbol level processing is generated later Sequence carries out base band to operations such as radio frequency processings, finally launches.
For the embodiment of the present invention, on the basis of transmitter as shown in figure 19, the embodiment of the present invention provides a kind of base In the novel access mode of bit-level processing and symbol level processing, as shown in figure 21, K transmitter is believed from physical broadcast Road, Physical Downlink Control Channel or Physical Downlink Shared Channel obtain respective bit level processor and symbol level processor (multiple frequency expansion sequence and scramble information).Bit level processor information and symbol level answer processor (frequency expansion sequence and scrambling) information use Processor used in processor and symbol level used in indication bit grade (multiple frequency expansion sequence and scramble sequence), and And it can be indicated by modes such as tables.Bit level processor and/or symbol level processor (multiple frequency expansion sequence and/or scramble sequence) are Receiver distinguishes the unique mark of different user.The specific mode for distinguishing user may include any one：
1. if only distinguished by bit level processor difference, at least share the bit-level of the user of identical running time-frequency resource Processor is different, and is not required symbol level processor.
2. if distinguished by symbol level processor, at least share the symbol level processor of the user of identical running time-frequency resource It is different, bit level processor is not required.
3. if distinguished by the combination of bit level processor and symbol level processor, at least share identical running time-frequency resource The combination of bit level processor and symbol level processor of user be different.
Wherein, the combination of different bit level processors and symbol level processor refers to identical data (sequence) by not The symbol sebolic addressing that the combination of same bit level processor and symbol level processor obtains differs.
For the embodiment of the present invention, K transmitter sends signal by way of above-mentioned transmitter, by respective channel hk, it is combined together in receiver, and interfered by noise.Receiver uses multi-user's iterative detection, specifically will first receive The signal arrived carries out radio frequency to Base-Band Processing, and obtained signal is then sent to Multiuser Detection as baseband receiving signals Device.The priori probability information for each bit that wherein multi-user detector is generated according to baseband receiving signals and previous iteration calculates The posterior probability information of each bit or each symbol, and the priori probability information of input detector is combined to calculate external information. Then according to the symbol level processor β of each userkTo detector output external information carry out inversely processing, be such as deinterleaved and Demultiplex spread spectrum.Then the Soft Inform ation sequence recovered at this time is sent to the corresponding bit level processor α of userkCarry out inverse place Reason, if for example, bit-level processing is bit-level intertexture, inversely processing is that bit-level deinterleaves.Then the soft letter after inversely processing Breath input decoder, in a decoder, the component code that is used according to transmitter is decoded accordingly, and terminal decision is used User data.
For the embodiment of the present invention, for next iterative detection, the Soft Inform ation that decoding obtains is again passed by and emitted The identical channel coding of machine, and the Soft Inform ation of oneself obtains external information before subtracting.By obtained external information by bit-level at Manage device αkAgain it handles, is then handled again using symbol level processor, it is such as again multiple to spread and interweave again.It finally obtains External information sequence as priori probability information input multi-user detector.So far, an iteration detection is completed, and above-mentioned behaviour is repeated Make to carry out next iteration detection decoding.In the above process, it is probabilistic information in the information that iterative detection and decoding transmits, that is, compares The probability of probability or symbol value specially for 0 or 1, is referred to as Soft Inform ation by this category information.Can use log-likelihood ratio or Log probability indicates that Soft Inform ation realizes operation to simplify.When first time iteration, without priori probability information, therefore multi-user is inputted The prior probability of detector is equal-probability distribution；Successive iterations use the newer priori probability information of last iteration.Work as iteration When number reaches preset maximum value, hard decision is carried out in a decoder and obtains the message data result of end user.Above-mentioned Multiuser signal detector can use the detector etc. of ESE or MPA or SIC.
In 5th specific embodiment of the embodiment of the present invention, it will introduce handled based on bit-level in this specific embodiment With symbol level handle access mode and carrier modulation association schemes, for the convenience of description, bit-level processing mode with than For superfine interweaves, for the mode of symbol level processing by taking symbol level is spread again as an example, the combination of different processing modes is similar, It is not repeating.
For the embodiment of the present invention, K transmitter uses the multiple access access side based on bit-level processing and symbol level processing Formula, receiver are detected the transmission data of K transmitter using multi-user's iterative detection and decoding structure.Due to carrier modulation It is flexible with resource distribution mode, the features such as being easy to anti-multipath fading, is combined with multi-carrier modulation scheme and also can preferably be sent out Wave the advantage of the access mode based on bit-level processing and symbol level processing.The present embodiment will be introduced and important carrier modulation The example that mode is combined.Shown in specific as follows：
Orthogonal frequency division multiplexing (the full name in English of 1.DFT extensions：DFT-spread-orthogonal frequency Division multiplexing, english abbreviation：DFT-s-OFDM), wherein DFT-s-OFDM is also referred to as single carrier orthogonal Frequency division multiple access (full name in English：Single-carrier Frequency-Division Multiple Access, english abbreviation： SC-FDMA), and the modulation system is up-link carrier modulation system used in LTE/LTE-A, in conjunction with DFT-s-OFDM's Access mode transmitter block diagram based on bit-level processing and symbol level processing is as shown in figure 22.
Wherein, as shown in figure 22, data flow to be sent interweaves by channel coding, bit-level, modulation is expanded again with symbol level After frequency, DFT-s-OFDM modulation is carried out.Figure 22 right half parts are the block diagram of DFT-s-OFDM.Specifically, serial data stream passes through Parallel data stream, data of the parallel data stream after obtaining DFT extensions after DFT, the number are converted to after serial-parallel conversion According to by carrier wave mapping and IDFT, is converted later by parallel-to-serial and add cyclic prefix (full name in English：Cyclic Prefix, english abbreviation：CP data to be sent are obtained after).
It should be noted that the data amount check before and after carrier wave mapping is different, the data after carrier wave mapping are no less than carrier wave Data before mapping.
In addition, carrier wave mapping also determines frequency resource used in transmitter.Since DFT-s-OFDM is belonging to one kind just The resource distribution mode of friendship, therefore after combining non-orthogonal access mode, it being capable of the more flexible more hairs of support Penetrate machine.The multiple transmitters for being further assigned with identical running time-frequency resource can again be spread by bit-level interleaver with symbol level Sequence is distinguished, and the transmitter for being assigned with orthogonal resource then can again be expanded using identical bit-level interleaver with symbol level Frequency sequence.In embodiments of the present invention, the running time-frequency resource, bit-level interleaver and symbol level for distributing to each transmitter are spread again Sequence is transmitted in Physical Broadcast Channel, Physical Downlink Control Channel or Physical Downlink Shared Channel, and transmitter is according to these Bit-level interleaver answers frequency expansion sequence and running time-frequency resource with symbol level used in information selection.
Further, interweaved based on bit-level in conjunction with DFT-s-OFDM and connect with the access mode that symbol level is spread again Receipts machine structure is as shown in figure 23.Wherein the demodulating process of DFT-s-OFDM is the inverse process of modulated process, as shown in figure 23, is passed through Data after demodulation are sent into obtains the data of each transmitter with multi-user's iterative detection and decoding.It should be noted that Fig. 2,3 institutes Show that receiver structure is suitable for servicing the structure of multiple transmitters in a manner of non-orthogonal on one group of running time-frequency resource.Therefore work as and examine When considering the transmitter on different running time-frequency resources, need individually to handle different running time-frequency resources with structure shown in Figure 23.
2. orthogonal frequency division multiplexing (full name in English：Orthogonal frequency division multiplexing, English Text abbreviation：OFDM), wherein OFDM is descending carrier modulation system used in LTE/LTE-A, while being also selected as in 5G main The up-link carrier modulation system wanted.The transmitter architecture based on mode map in conjunction with OFDM is as shown in figure 24.
In Figure 24, is modulated, obtained pending by OFDM by the data flow to be interweaved based on bit-level and symbol level is spread again Send data.Wherein, OFDM modulation includes serial-parallel conversion, and data to be modulated (are mapped to different OFDM to accord with by resource impact Number different sub-carrier on), IDFT and parallel-to-serial conversion and CP addition.Similar with DFT-s-OFDM, OFDM is a kind of Orthogonal multi-carrier modulation, by answering spread spectrum multiple access access way with based on bit-level intertexture and symbol level and being combined, energy More flexible resource distribution mode enough is provided for system, and supports more users.Wherein, it is assigned with identical running time-frequency resource Multiple transmitters can answer frequency expansion sequence by bit-level interleaver and symbol level and distinguish, and be assigned with the hair of orthogonal resource Penetrating machine can then use identical bit-level interleaver to answer frequency expansion sequence with symbol level.Further distribute to each transmitter Running time-frequency resource, bit-level interleaver and symbol level answer frequency expansion sequence in Physical Broadcast Channel, Physical Downlink Control Channel or object It is transmitted in reason DSCH Downlink Shared Channel.Transmitter selects used bit-level interleaver to be spread again with symbol level according to these information Sequence and running time-frequency resource.
For the embodiment of the present invention, in conjunction with the receiver structure of the two-stage Interleave Division Multiple Access based on mode map of OFDM As shown in figure 25.
Wherein, the inverse process for being demodulated into its modulation of OFDM.It specially receives signal and removes CP, carry out parallel-to-serial and turn DFT and resource demapping are alternatively carried out afterwards, and each transmitter is obtained by iterative detection and decoding after serial-parallel conversion Data flow.
3. OFDM (the full name in English based on filtering：Filtered-OFDM, english abbreviation：F-OFDM)
Wherein, F-OFDM is a kind of wave forms modulation technique based on sub-band filter, disclosure satisfy that future scene in band The demand of external leakage, resource allocation flexibility ratio etc. is one of the candidate technologies of novel air vocal imitation skill.In conjunction with the base of F-OFDM It is as shown in figure 26 in the transmitter block diagram for the multiple access technique that bit-level interleaver answers frequency expansion sequence with symbol level.
Wherein, as shown in figure 26, pending data stream interweaves by channel coding, bit-level, modulation is expanded again with symbol level After frequency, the modulation of F-OFDM is carried out.The modulation system of F-OFDM is as shown in Figure 26 right half parts.I.e. input data first passes around string Row-Parallel transformation is converted to parallel data, and IDFT is carried out after resource impact, is converted using parallel-to-serial, and is added CP obtains time-domain signal, then according to subband frequency range to be sent, is filtered to time-domain signal using time domain sub-band filter, Obtain time-domain signal to be sent.In embodiments of the present invention, compared with OFDM technology, F-OFDM supports sub-band filter, can The more flexible transmitter for supporting various carrier modulation configurations.Meanwhile F-OFDM remains support spirit also by resource impact The advantages of resource allocation living.
Wherein, receiver can be incited somebody to action by Physical Broadcast Channel, Physical Downlink Control Channel or Physical Downlink Shared Channel Distribute to the side that subband, resource allocation conditions, the bit-level interleaver of transmitter answer frequency expansion sequence by searching for table with symbol level Formula informs transmitter.Transmitter adjusts used bit-level interleaver according to these information, symbol level answers frequency expansion sequence, resource The method of salary distribution, multi-carrier modulation parameter setting used and time domain filtering parameter setting, and transmission data.
For the embodiment of the present invention, receiver passes through handled subband, resource distribution mode and bit-level interleaver Frequency expansion sequence, which is answered, with symbol level distinguishes the data from different transmitters.In conjunction with F-OFDM based on bit-level intertexture and symbol level The receiver block diagram of multiple spread spectrum multiple access access technology is as shown in figure 27.
Wherein, in example shown in Figure 27, entire frequency band is divided into L subband, passes through orthogonal resource on each subband Distribution provides the data access service of multiple transmitters with non-orthogonal interlacing multi-address.I.e. receiver passes through sub-band filter first The data information in each subband is obtained, then is obtained transmitted by the transmitter being allocated on each running time-frequency resource by OFDM demodulation Data.The mode that above two step distinguishes user is all orthogonal, and interference is ideally not present.When same sub-band is identical What is received in frequency resource is the data that multiple transmitters are sent, and is needed using the iterative detection and decoding in similar above-described embodiment Receiver structure is detected.
It should be noted that remove outside example enumerated above, it is provided by the present invention to interweave and accord with based on bit-level Number grade, which answers spread spectrum multiple access access technology, to be combined with the carrier modulation technique of other modes, for example, broad sense filtering overloading Wave modulates (full name in English：Universal-filtered multi-carrier, english abbreviation：UFMC), the continuous OFDM of N ranks (full name in English：N-continuous OFDM, english abbreviation：NC-OFDM), filter bank multi-carrier modulates (full name in English： Filter-bank multi-carrier, english abbreviation：) etc. BMC modes are combined.
The 6th specific embodiment of the present invention will be introduced improved by being superimposed multiple transport streams in embodiments of the present invention The scheme of single user data transfer rate.As shown in first specific embodiment, K transmitter is used to be handed over system configuration based on bit-level The transmitter architecture that spread spectrum multiple access access technology is answered with symbol level is knitted, receiver multi-user association iterative detection receiver is to K The data of user are detected.
For the embodiment of the present invention, to improve the transmission data rate of single user, the side of multithread superposition is used in transmitter For formula simultaneously with defeated multiple data transfer rates are kept pouring in, transmitter block diagram is as shown in figure 28.
Specifically, Tu28Zhong, data flow 1 to data flow M are the data flow of single user, can be generated by a data source Generated after shunting later or M independent data stream generate respectively or partial data stream by the generation of data source after Shunting, another part data flow are generated by independent data source.The data of each data flow are handed over by channel coding, bit-level After knitting, modulating and spread again with symbol level, the symbol stream of generation passes through phase and power adjustment, and carries out multi-carrier modulation, process Conversion after the signal stream superposition of multi-carrier modulation by base band to radio frequency is sent.Wherein, multi-carrier modulation be superimposed Sequence can exchange, i.e., first carry out the superposition of each data flow, carrying out multi-carrier modulation and sending.
Further, it is similar with example shown in Fig. 4 to receive machine testing decoding structure.Specifically, multi-user detector according to The phase and power adjustment that each each data flow of user carries out modulation symbol complete symbol detection, and carry out it is subsequent repeatedly Generation detection decoding operate.Iterative detection and decoding device exports the traffic flow information of each user's whole, and receiver is handed over according to bit-level It knits device and/or symbol level answers identification and differentiation of the frequency expansion sequence completion to user data.
Wherein, it is the foundation for distinguishing different user and different data streams that bit-level interleaver answers frequency expansion sequence with symbol level. The specific method of salary distribution is as follows：
1. the different data streams of identical transmitter are distributed identical bit-level interleaver and are spread again with different symbol level Sequence, different transmitters distribute different bit-level interleavers.Receiver is distinguished according to bit-level interleaver and comes from different transmittings The data of machine answer the different data streams that frequency expansion sequence distinguishes same transmitter according to symbol level.
2. the different data streams of identical transmitter distribute identical symbol level and answer frequency expansion sequence and the friendship of different bit-level Device is knitted, different transmitters distribute different symbol levels and answer frequency expansion sequence.Receiver according to second level mode map pattern distinguish come From the data of different transmitters, the different data streams of same transmitter are distinguished according to bit-level interleaver.
3. the different data streams for different transmitters distribute different bit-level interleaver and symbol level answers frequency expansion sequence. Receiver answers frequency expansion sequence according to bit-level interleaver and symbol level and distinguishes each data flow, and then obtains the number of each transmitter According to.
Wherein, the criterion of phase and power adjustment is, it is ensured that the symbol corresponding to the different data streams from same transmitter Number superposition when will not be overlapped or offset.A kind of preferred criteria for constellation point modulation system is to meet power limit Under conditions of, the phase and algorithm for power modulation criterion of lower order modulated data stream are designed according to high-order modulation constellation figure.To use BPSK is modulated, as shown in table 1 to every phase and power adjusting factor all the way for the transmitter of eight stream of transmission.
Table 1：Phase and power adjustment example
Stream 1 2 3 4 5 6 7 8
Phase (°) 45 -45 45 -45 18.43 -18.43 71.57 -71.57
Power 0.2 0.2 1.8 1.8 1 1 1 1
Wherein, if k-th of data flow phase adjustment factor is θk, power adjusting factor ak, and transmit constellation point symbol and be xk, then k-th of data flow actual transmissions symbol beAfter phase and power adjustment being carried out according to table 1, The planisphere for being analogous to 16QAM modulation that transmitter after superposition is sent, and each stream transmission symbol in superposition does not weigh It is folded, also do not cancel out each other.Wherein θkWith akIt is determined by table 1.
For the embodiment of the present invention, to service multiple transmitters (user) on identical running time-frequency resource, receiver can incite somebody to action For distinguishing the bit-level interleaver of transmitter (user), symbol level answers frequency expansion sequence, corresponding phase power Dynamic gene with And the maximum fluxion supported is sent in a manner of look-up table under Physical Broadcast Channel, Physical Downlink Control Channel or physics On the shared channel of row.Transmitter needs to be superimposed according to the data fluxion to be sent and the maximum fluxion supported, determination Fluxion, and per first-class bit-level interleaver, the symbol level distributed answer frequency expansion sequence, corresponding phase power adjust because Son.
Wherein, if the fluxion K actually sent is less than the maximum fluxion K that receiver is supportedmax, transmitter can be used as follows Mode is sent：
1. only sending K data flow, and physically reception is informed in row control channel or Physical Uplink Shared Channel Fluxion transmitted by machine.Fluxion instruction is sent, informs that receiver needs the fluxion received in a manner of look-up table.
2. sending KmaxA data flow, wherein there is K data stream transmitting information, other KmaxComplete zero number of-K data stream transmittings According to.Since full null sequence is the code word allowable of channel coding, if receiver detect complete zero or close to complete zero sequence, recognize It is not used for transmission data for the stream.After completing iterative detection and decoding process, zero number in statistical decoder sequence.If zero Number be more than preset threshold value, then it is assumed that the stream is used for transmission ordered sequence, otherwise it is assumed that the stream is not used for transmission Ordered sequence.
For the embodiment of the present invention, by way of multithread superposition, the scheme that the embodiment of the present invention is provided can be in phase With supporting more user on running time-frequency resource, while the transmission data rate of single user is improved, and keeps higher reliability.
The 7th specific embodiment of the present invention, will introduce in the present embodiment to interweave based on bit-level and is spread again with symbol level The scheme that is combined with multi-antenna technology of access mode.System configuration is as shown in first specifically embodiment, K hair It penetrates machine and answers the access mode of frequency expansion sequence with symbol level using based on bit-level intertexture, and be equipped with NTRoot transmission antenna, with The mode transmission data of multiple antennas.Receiver is carried out by the way of iterative detection and decoding as shown in Figure 4 to sending bit stream Detection and estimation.Receiver is equipped with NRRoot reception antenna.
Wherein, transmitter is transmitted by such as Figure 29 under type using multi-antenna technology.
1. as shown in figure 29, only sending a data flow, data flow is by channel coding, bit-level intertexture, modulation and symbol After number grade is spread again, serial-parallel conversion is carried out, a stream compression is changed to multiple data flows.It can also be similar to Layer in LTE maps (full name in English：Layer mapping), a stream compression is changed to multiple data flows.Then to these Data flow is pre-processed, and multi-antenna data stream to be sent is obtained.Wherein pretreatment includes air time precoding operation, such as with The multiplication of pre-coding matrix or progress Space Time Coding etc..To estimate channel state information, transmitter is in serial-parallel conversion Each of the links after (or layer mapping) are inserted into mutually orthogonal reference signal, and mutually orthogonal ginseng is also used between different transmitters Examine signal.Receiver is estimated to pass through pretreated equivalent channel status information according to reference signal.Wherein, receiver still uses Superposition detection decoding structure as shown in Figure 4, concrete structure are as shown in figure 30.It receives signal and passes through multi-antenna multi-user detector Later, the estimation of each transmission link signal is obtained.These signals must arrive after carrying out parallel-to-serial conversion (or layer demapping) From in the data flow of a transmitter.The data flow demultiplexes spread spectrum by symbol level, bit-level is deinterleaved with after channel decoding, obtains To the estimation of the transmitter transmission data.It regard data estimation as prior information, carries out bit-level intertexture, symbol level is spread again With serial-parallel conversion (or layer mapping), prior information of the input multi-antenna multi-user detector as next iteration.
Wherein, be distinguish the data from different transmitters, different transmitters using different bit-level interleaver and/ Or symbol level answers frequency expansion sequence.Specific bit-level interleaver and/or symbol level answer the frequency expansion sequence method of salary distribution and can refer to aforementioned reality Example is applied, details are not described herein.
2. as shown in figure 31, sending M data flow, each data flow is by channel coding, bit-level intertexture, modulation and symbol Number grade is spread again.In Figure 31, the function for the data generation that module is interweaved based on bit-level and symbol level is spread again is exactly with Fig. 3 institutes The mode of showing handles data flow.Wherein, treated data flow is mapped by layer and is sent by multiple antennas with after pretreatment, It is unit matrix that a kind of middle possible layer mapping maps equivalent matrix and pre-process equivalent matrix with pretreatment mode for layer, i.e., Treated data flow is corresponded with transmission antenna link, and under this mode, each data link is inserted into mutually orthogonal Reference signal, for the channel estimation per data link；When receiver is handled, each link is considered as to different uses The transmitter of single antenna, the detection of data bit flow is carried out using iterative detection and decoding structure as shown in Figure 4, and passes through bit-level Interleaver and/or symbol level answer frequency expansion sequence and distinguish the data flow for coming from different user.
For the embodiment of the present invention, bit-level interleaver and symbol level answer the distribution of frequency expansion sequence by searching for the mode of table Each transmitter is notified in broadcast channel, Physical Downlink Control Channel or Physical Downlink Shared Channel.Come to distinguish The data flow of different user, bit-level interleaver and symbol level answer frequency expansion sequence being assigned such as lower section between different transmitters Formula：
A. the different data streams of identical transmitter spread sequence again using identical bit-level interleaver from different symbol levels Row, different transmitters use different bit-level interleaver；Receiver is distinguished by bit-level interleaver and comes from different transmittings The data of machine answer frequency expansion sequence to distinguish the different data streams of same transmitter by symbol level.
B. the different data streams of identical transmitter answer frequency expansion sequence using identical symbol level and interweave from different bit-levels Device, different transmitters answer frequency expansion sequence using different symbol level；Receiver is answered frequency expansion sequence differentiation by symbol level and is come from The data of different transmitters distinguish the different data streams of same transmitter by bit-level interleaver.
For the embodiment of the present invention, the different data streams of different transmitters use different bit-level interleaver and not phase Same symbol level answers frequency expansion sequence；Receiver combination bit-level interleaver answers frequency expansion sequence to distinguish each user's with symbol level Different data streams.
3. as shown in figure 32, sending multiple data flows, the different data streams of identical transmitter pass through phase and power adjustment It is superimposed, using serial-parallel conversion (or layer mapping) and pretreatment, is sent by more transmitting antennas later.
Wherein, it to distinguish the different data streams for coming from different transmitters, needs to hand over for each data flow distribution ratio superfine It knits device and symbol level answers frequency expansion sequence.Method of salary distribution scheme with reference to described in the 7th specific embodiment, while believing in physical broadcast Each transmitter is notified in road, Physical Downlink Control Channel and Physical Downlink Shared Channel.
Wherein, phase/whole purpose of power tune is to make each data flow from same transmitter in superposition not It can be overlapped or offset, specific adjustment mode is referring to the 6th specific embodiment of the invention.For estimate each link etc. Channel state information is imitated, needs to be inserted into reference signal.Reference signal is inserted in after serial-parallel conversion (or layer mapping), warp It crosses pretreatment and is sent to receiver later, pass through pretreated equivalent channel for estimating.After phase/power adjustment, connect Receipts machine, which may be used mode as shown in figure 30 and dock the collection of letters, number to be detected, and is spread again according to bit-level interleaver and symbol level Sequence distinguishes the different data streams for coming from different transmitters.
4. the combination of at least two modes in above-mentioned three kinds of modes.Such as part of links directly maps, part of links is passed through Layer mapping etc. is carried out after serial-parallel conversion.
It should be noted that in upper type, the second way is more suitable for for improving transmission data rate, that is, is used The mode for transmitting different data streams on different links improves transmission data rate；And first way be more suitable for improve transmission can By property, i.e., space diversity is obtained by Space Time Coding such as space-time block code, space frequency block codings, it is reliable to improve transmission Property；The third mode can obtain the promotion of reliability and data transfer rate simultaneously, that is, pass through space-time block code, space frequency block coding Equal Space Time Coding obtain space diversity, while the promotion of data transfer rate is obtained by the superposition of multiple data flows；And the 4th kind of mode It can regard the compromise between reliability and data transfer rate as.
For the embodiment of the present invention, when transmitter can obtain the letter of transmission channel by modes such as channel estimation or feedbacks When channel state information, it can be eliminated by modes such as precodings (such as force zero precoding) dry between same transmitter difference link It disturbs, this will greatly simplify the operation of receiver, while various modes described above may be incorporated for improving transmission data rate.
The present invention provides a kind of transmitters, and as shown in figure 33, which further includes：Channel coding module 3301, place Manage module 3302, sending module 3303, wherein
Channel coding module 3301, for carrying out channel coding to information bit sequence to determine coded sequence.
Processing module 3302, for channel coding module 3301 encode obtained coded sequence carry out bit-level processing with And symbol level processing, the sequence that obtains that treated.
Sending module 3303, for sending treated sequence.
An embodiment of the present invention provides a kind of transmitters, compared with existing transmitter, receiver in the embodiment of the present invention Processing, Neng Gouqu are decoded to the data received by mutually different symbol level processor and/or bit level processor The data of other different transmitters transmitting, and will not be limited by orthogonal resource, further transmitter passes through bit Level processor and symbol level processor handle data, and being conducive to multiple transmitters can be on identical running time-frequency resource Transmission data, so that receiver can receive the upstream data that multiple transmitters are sent simultaneously, being conducive to will be identical Running time-frequency resource be multiplexed increase to multiple transmitters can service-transmitter quantity, and then receiver clothes can be further improved The quantity of business user.
The embodiment of the method for above-mentioned offer may be implemented in transmitter provided in an embodiment of the present invention, and concrete function realization please be joined See the explanation in embodiment of the method, details are not described herein.
The present invention provides a kind of receivers, and as shown in figure 34, which further includes：Receiving module 3401, decoding mould Block 3402, wherein
Receiving module 3401, for receiving the signal from multiple transmitters
Wherein, signal is that each transmitter in multiple transmitters passes through at bit-level processing and symbol level data Signal after reason.
Decoder module 3402, for according to bit level processor corresponding with each transmitter and symbol level processor pair The signal that receiving module 3401 receives is decoded, and obtains the corresponding data of each transmitter.
An embodiment of the present invention provides a kind of receivers of multiple access access, and compared with existing receiver, the present invention is implemented Receiver is decoded place by mutually different symbol level processor and/or bit level processor to the data received in example Reason, can distinguish the data of different transmitters transmitting, and will not be limited by orthogonal resource, further transmitter Data are handled by bit level processor and symbol level processor, being conducive to multiple transmitters can be when identical Frequency transmitted over resources data are conducive to so that receiver can receive the upstream data that multiple transmitters are sent simultaneously Identical running time-frequency resource is multiplexed increase to multiple transmitters can service-transmitter quantity, and then can be further improved The quantity of receiver service user.
The embodiment of the method for above-mentioned offer may be implemented in receiver provided in an embodiment of the present invention, and concrete function realization please be joined See the explanation in embodiment of the method, details are not described herein.
Those skilled in the art of the present technique are appreciated that the present invention includes being related to for executing in operation described herein One or more equipment.These equipment can specially be designed and be manufactured for required purpose, or can also include general Known device in computer.These equipment have the computer program being stored in it, these computer programs are selectively Activation or reconstruct.Such computer program can be stored in equipment (for example, computer) readable medium or be stored in It e-command and is coupled to respectively in any kind of medium of bus suitable for storage, the computer-readable medium includes but not Be limited to any kind of disk (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk), ROM (Read-Only Memory, only Read memory), RAM (Random Access Memory, immediately memory), EPROM (Erasable Programmable Read-Only Memory, Erarable Programmable Read only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or light card Piece.It is, readable medium includes by any Jie of equipment (for example, computer) storage or transmission information in the form of it can read Matter.
Those skilled in the art of the present technique be appreciated that can with computer program instructions come realize these structure charts and/or The combination of each frame and these structure charts and/or the frame in block diagram and/or flow graph in block diagram and/or flow graph.This technology is led Field technique personnel be appreciated that these computer program instructions can be supplied to all-purpose computer, special purpose computer or other The processor of programmable data processing method is realized, to pass through the processing of computer or other programmable data processing methods Device come execute structure chart and/or block diagram and/or flow graph disclosed by the invention frame or multiple frames in specify scheme.
Those skilled in the art of the present technique are appreciated that in the various operations crossed by discussion in the present invention, method, flow Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with having been crossed by discussion in the present invention Other steps, measures, and schemes in kind operation, method, flow may also be alternated, changed, rearranged, decomposed, combined or deleted. Further, in the prior art to have and step, measure, the scheme in various operations, method, flow disclosed in the present invention It may also be alternated, changed, rearranged, decomposed, combined or deleted.
The above is only some embodiments of the present invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (20)

1. a kind of method of multiple access access, which is characterized in that including：
Transmitter carries out channel coding to determine coded sequence to information bit sequence；
Bit-level processing and symbol level processing are carried out to the coded sequence, the sequence that obtains that treated, and send the place Sequence after reason.
2. the method for multiple access access according to claim 1, which is characterized in that described to carry out bit to the coded sequence The step of grade processing and symbol level processing, the sequence that obtains that treated, including：
Bit-level processing is carried out to the coded sequence by bit level processor；
Bit is carried out to symbol-modulated processing to bit-level treated sequence, obtains symbol sebolic addressing；
Symbol level processing is carried out to the symbol sebolic addressing by symbol level processor, the symbol sebolic addressing that obtains that treated.
3. the method for multiple access according to claim 2 access, which is characterized in that it is described by bit level processor to described Coded sequence carries out the mode of bit-level processing, including any one of following：
Processing is interleaved to the coded sequence by bit-level interleaver；
Scrambling processing is carried out to the coded sequence by bit-level scrambler；
Spread processing is carried out to the coded sequence by bit-level spreader.
4. the method for multiple access access according to claim 3, which is characterized in that the transmitter is obtained by any one of following Bit-level interleaver information, bit-level scrambler information and/or bit-level spreader information are taken, for the coded sequence Carry out bit-level processing：
Physical Broadcast Channel；Physical Downlink Control Channel；Physical Downlink Shared Channel.
5. the method for multiple access access according to claim 4, which is characterized in that carried out at symbol level to the symbol sebolic addressing The mode of reason, including it is any one of following：
Symbol level spread processing is carried out to the symbol sebolic addressing；
Symbol level spread processing and symbol level interleaving treatment are carried out to the symbol sebolic addressing；
Symbol level scrambler processing is carried out to the symbol sebolic addressing；
Symbol level spread processing and the processing of symbol level scrambler are carried out to the symbol sebolic addressing.
6. the method for multiple access access according to claim 5, which is characterized in that
The mode of symbol level spread processing is carried out to the symbol sebolic addressing, including：
Symbol level spread processing is carried out to the symbol sebolic addressing by multiple spreading code；
The mode of symbol level interleaving treatment is carried out to the symbol sebolic addressing, including：
Symbol level interleaving treatment is carried out to symbol sebolic addressing by symbol level interleaver；
The mode of symbol level scrambler processing is carried out to the symbol sebolic addressing, including：
Symbol level scrambler processing is carried out to symbol sebolic addressing by symbol level scramble sequence.
7. the method for multiple access access according to claim 5 or 6, which is characterized in that the place of the symbol level interleaving treatment Reason mode includes any one of following：Direct interleaving treatment；Zero padding interleaving treatment；Direct zero insertion interleaving treatment；The processing of intertexture zero insertion.
8. the method for multiple access access according to claim 7, which is characterized in that the direct interleaving treatment is to pass through symbol Grade interleaver carries out symbol level interleaving treatment to symbol sebolic addressing；
The zero padding interleaving treatment is to carry out zero padding processing to symbol sebolic addressing, and treated to zero padding by symbol level interleaver Symbol sebolic addressing carries out symbol level interleaving treatment；
The direct zero insertion interleaving treatment is to carry out zero insertion processing to symbol sebolic addressing according to zero insertion drawing information；
The intertexture zero insertion processing carries out symbol level interleaving treatment for foundation symbol level interleaver to symbol sebolic addressing, and will be after processing Symbol sebolic addressing according to zero insertion drawing information carry out zero insertion processing.
9. the method accessed according to claim 5-8 any one of them multiple access, which is characterized in that the transmitter passes through following Any one obtains multiple spreading code, symbol level interleaver and/or symbol level scramble sequence：
Physical Broadcast Channel；Physical Downlink Control Channel；Physical Downlink Shared Channel.
10. the method for multiple access according to claim 2 access, which is characterized in that the method further includes：
If the transmitter is configured with more antennas, and when current data to be sent are single flow data, then the transmitter By symbol level, treated that data are converted to multi-stream data or multi-layer data, is emitted by each antenna.
11. the method for the multiple access access according to claim 2 or 10, which is characterized in that the method further includes：
If transmitter data to be sent be multi-stream data, and the transmitter be configured with more antennas, then according to Lower at least one mode is handled：
The multi-stream data is passed through into channel coding, bit-level processing, modulation and symbol level processing, layer mapping and pre- place Reason, the multi-stream data that obtains that treated, and will treated the multi-stream data, emitted by each antenna；
The multi-stream data is handled, by channel coding, bit-level processing, modulation and symbol level at phase/power adjustment Reason, overlap-add procedure, serial-parallel conversion processing and pretreatment, the multi-stream data that obtains that treated, and will described treated Multi-stream data is emitted by each antenna.
12. a kind of method of multiple access access, which is characterized in that including：
Receiver receives the signal from multiple transmitters, and the signal is each transmitter in multiple transmitters to data It is handled by bit-level and symbol level treated signal；
The receiver according to bit level processor corresponding with each transmitter and symbol level processor to the signal into Row decoding, obtains the corresponding data of each transmitter.
13. according to the method for claim 12, which is characterized in that the receiver is according to ratio corresponding with each transmitter Superfine processor and/or symbol level processor are decoded the signal, obtain the corresponding number of each transmitter According to the step of, including：
Symbol level decoding process is carried out to the signal using symbol level processor corresponding with each transmitter；
Bit-level is carried out to the data after symbol level decoding process using bit level processor corresponding with each transmitter Decoding process.
14. the method for multiple access access according to claim 12, which is characterized in that according to ratio corresponding with each transmitter The mode that superfine processor and symbol level processor are decoded the signal, including following any case：
Receiver is handled according to identical symbol level processor corresponding with each transmitter and mutually different bit-level respectively Device carries out symbol level decoding process and bit-level decoding process to the signal；
Receiver is according to mutually different symbol level processor corresponding with each transmitter and identical bit level processor pair The signal carries out symbol level decoding process and bit-level decoding process；
Combination pair of the receiver according to mutually different symbol level processor corresponding with each transmitter and bit level processor The signal carries out symbol level decoding process and bit-level decoding process.
15. the method for multiple access according to claim 14 access, which is characterized in that the method further includes：
If the signal comes from each transmitter respectively according to mutually different bit level processor pair for what receiver received Data to be sent carry out bit-level processing, using the signal that symbol level processor obtained after symbol level processing, then connect Receipts machine carries out bit-level decoding process according to mutually different bit level processor to the decoded data of symbol level processor；
If the signal comes from each transmitter respectively according to mutually different symbol level processor pair for what receiver received Data carry out the signal obtained after symbol level processing after bit level processor processing, then receiver is according to mutually different symbol level Processor carries out symbol level decoding process to the mixed signal；
If the signal is receiver receive from each transmitter respectively according to mutually different bit level processor and The signal that the combination of symbol level processor to sent data obtain after bit-level processing and symbol level processing, then connect Receipts machine carries out symbol level decoding according to the combination of mutually different bit level processor and symbol level processor to the signal Processing and bit-level decoding process.
16. the method for multiple access access according to claim 15, which is characterized in that the mutually different bit-level processing The combination of device and symbol level processor, including following any combination mode：
Bit level processor is identical and symbol level processor is different；
Bit level processor is different and symbol level processor is identical；
Bit level processor and symbol level processor are all different.
17. the method for multiple access access according to claim 16, which is characterized in that receiver foundation and each transmitting respectively The combination of the corresponding mutually different bit level processor of machine and symbol level processor carries out at symbol level decoding the signal The multiple data obtained after reason and bit-level decoding process are different.
18. the method accessed according to claim 12-17 any one of them multiple access, which is characterized in that handled by bit-level Device carries out the mode of bit-level decoding process, including following any case：
It is deinterleaved processing by bit-level interleaver；
Solution scrambling processing is carried out by bit-level scrambler；
It carries out despreading processing by bit-level spreader；
Wherein, in such a way that symbol level processor carries out symbol level decoding process, including following any case：
Symbol level, which is carried out, by multiple spreading code despreads processing；
Symbol level is carried out by multiple spreading code, symbol level interleaver respectively and despreads processing and symbol level deinterleaving processing；
Symbol level descrambling code processing is carried out by symbol level scramble sequence；
Symbol level is carried out by multiple spreading code, symbol level scramble sequence respectively and despreads processing and the processing of symbol level descrambling code.
19. a kind of transmitter, which is characterized in that including：
Channel coding module, for carrying out channel coding to information bit sequence to determine coded sequence；
Processing module, the coded sequence for being encoded to the channel coding module carry out bit-level processing and symbol level Processing, the sequence that obtains that treated；
Sending module, for sending treated the sequence.
20. a kind of receiver, which is characterized in that including：
Receiving module, for receiving the signal from multiple transmitters, the signal is each transmitting in multiple transmitters Machine is handled by bit-level data and symbol level treated signal；
Decoder module, for basis bit level processor corresponding with each transmitter and symbol level processor to the reception The signal that module receives is decoded, and obtains the corresponding data of each transmitter.
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