CN105991228A

CN105991228A - Downlink multi-user information transmitting method, receiving method and corresponding devices

Info

Publication number: CN105991228A
Application number: CN201510084001.3A
Authority: CN
Inventors: 袁志锋; 戴建强
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-02-15
Filing date: 2015-02-15
Publication date: 2016-10-05
Anticipated expiration: 2035-02-15
Also published as: CN105991228B; WO2016127747A1

Abstract

The invention discloses a downlink multi-user information transmitting method, a downlink multi-user information receiving method and corresponding devices. The transmitting method includes the following steps that: m pieces of information to be transmitted are separately modulated, so that m modulation symbols can be obtained, wherein m is a positive integer greater than 2; cumulative superposition is performed on the m obtained modulation symbols sequentially, in a superposition process, except the first modulation symbol, the other m-1 modulation symbols are subjected to mirroring optimization before the superposition; and the sequentially and cumulatively superposed symbols form transmitting signals, and the transmitting signals are transmitted through a transmitter. The receiving method includes the following steps that: the transmitting signals are received; when the first modulation symbol is demodulated, the symbol carried by the transmitting signals is directly demodulated, so that an original modulation symbol can be obtained; and when the other m-1 modulation symbols are demodulated, the other m-1 modulation symbols are demodulated, and a part of the symbols are removed, and the remaining symbols are demodulated again, so that symbols to be optimized can be obtained, and inverse mirroring is performed on the symbols to be optimized, so that original modulation symbols can be obtained. With the downlink multi-user information transmitting method, receiving method and the corresponding devices of the invention adopted, constellation points formed by the symbols superposed by a transmitting end have Gray mapping attribute, and a receiving end only needs to carry out one-time successive interference cancellation (SIC).

Description

A kind of descending multi-user information sending, receiving method and corresponding intrument

Technical field

The present invention relates to wireless communication field, particularly to a kind of descending multi-user information transmission, recipient Method and device.

Background technology

In a wireless communication system, multi-user information transmission is divided into uplink and downlink transfer.Descending many User profile transmission is also generally referred to as downlink broadcast, and it refers to emitter and sends out to multiple receivers simultaneously Send respective information needed.Descending multi-user information is transmitted, and has orthogonal multiple access to access (Orthogonal Multiple Access, referred to as OMA) and non-orthogonal multiple access (None Orthogonal Multiple Access, Referred to as NOMA) two kinds of access modes, as orthogonal CDMA and OFDMA belong to anon-normal Hand over the category of access technology.

In orthogonal multiple access technique, each user uses strictly mutually orthogonal " subchannel " to lead to Letter, thus do not interfere between each user profile when demodulation, and then separation user profile is easier to. Relatively, in non-orthogonal multiple access technology, the information of each user is in " whole passage " upper transmission 's.NOMA mode can obtain the power system capacity bigger than OMA mode, and especially, it can make limit The capacity of edge user ensures that central user Capacity Ratio is more considerable while approaching single user capacity limit.But, Interfering between each user profile when demodulation, more bothering so separating user profile.

Before NOMA broadcast transmission, the signal of multi-user be directly superimposed to together, then in phase It is transmitted on same running time-frequency resource.The process being overlapped multiple user signals is also called " supercomposed coding ". At receiving terminal, each user receives the signal that all users are superimposed, and can solve the information of oneself, Can be generally divided into two kinds of demodulation methods: the first, each user demodulates with the interference of other users, It is achieved in that relatively simple, but performance damages.The second, uses interference cancellation techniques.

Below to serial interference elimination (Successive Interference Cancellation, referred to as SIC) Process illustrates, as a example by two users, it is assumed that the channel between user 1 and base station is H1, and user 2 And the channel between base station is H2, H1 is worse compared with H2, is expressed as H1 < H2.User 1 is solving oneself letter During breath, solve with the interference of user 2.And user 2 is when solving oneself information, need first to demodulate user 1 Information, then solution user 1 information (may need reconstruct) out is deducted, then just demodulate oneself Information.So user 2 information is because interference can be eliminated, so performance can have a distinct increment.

When SIC process has K user (K is the integer more than 2), it is assumed that between user k and base station Channel be Hk (k=1,2 ... K), the channel between user 1 and base station is to the letter between user K and base station Road becomes more preferable successively, be expressed as H1 < H2 < ... < HK.User 1 is when solving oneself information, with other The interference of all user profile demodulates.User 2, when solving oneself information, needs first to demodulate user 1 information, Again solution user 1 information out (may need reconstruct) is deducted, then with user 3 information to using The interference of family K information demodulates user 2 information.The rest may be inferred, when solving user's K information, needs to do K-1 SIC, solves user 1 information successively, after being removed, solves user 2 information, is removed After, solve user's K-1 information, after being removed, finally solve user's K information.

Multi-user's (being more than two users) signal directly adds up mutually and is a kind of simplest " supercomposed coding ", If Fig. 1 a and Fig. 1 b is the schematic diagram of the direct supercomposed coding of 3 subscriber signals according to correlation technique, 2 QPSK symbol (in Fig. 1 a left several the 1st, 2 symbols) and 1 16QAM symbol are (right in Fig. 1 a Several 1st symbols) direct superposition, as shown in Figure 1 b, symbol after superposition is formed the symbol after superposition Constellation point does not has gray mappings, and (the adjacent constellation point of mapping only exists 1 bit difference, so modulates Best performance) attribute, cause systematic function not high.For the central user nearest from base station, Doing repeatedly (need to be K-1 time during K user) SIC, if using code block level SIC to receive, will make multiple Miscellaneous degree, power consumption, time delay is very big, if using simple symbol level SIC to receive, will make under demodulation performance Fall is relatively big, and time delay is big, has error propagation risk simultaneously.

In sum, the multi-user in correlation technique (being more than two users) signal is directly added, superposition Rear symbol constellation point does not has gray mappings attribute, and central user needs to be repeatedly SIC and causes performance not high Or complexity, time delay are big.

Content of the invention

The technical problem to be solved in the present invention is to provide a kind of descending multi-user method for sending information and device, The constellation point making the symbol after the modulation symbol superposition of transmitting terminal multi-user information be formed has gray mappings and belongs to Property, improve modulating performance.

For solving above-mentioned technical problem, the invention provides a kind of descending multi-user method for sending information, bag Include:

Being modulated m information to be sent respectively, obtaining m modulation symbol, m is for more than 2 just Integer；

Described m the modulation symbol obtaining is added up successively superposition, during superposition, removes the 1st tune Outer symbol processed, remaining m-1 modulation symbol first carries out mirror image optimization before superposition；

Symbol after described accumulative superposition successively is formed and launches signal, sent by emitter.

Further, described by described m the modulation symbol obtaining successively accumulative superposition, the process of superposition In, in addition to the 1st modulation symbol, remaining m-1 modulation symbol first carries out mirror image optimization before superposition, Including:

Mirror image optimization is carried out to the 2nd modulation symbol, the 2nd after the 1st modulation symbol is optimized with mirror image Individual modulation symbol superposition obtains symbol s1, carries out mirror image optimization to the 3rd modulation symbol, by described symbol S1 superposes with the 3rd modulation symbol after mirror image optimization and obtains s2, by that analogy, until all m tune Symbol processed all superpositions are complete.

Further, remaining m-1 modulation symbol described first carries out mirror image optimization before superposition, comprising:

For k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, by described kth The constellation point that individual modulation symbol is formed carries out mirror image operation according to the constellation point that front superposition symbol is formed, described Front superposition symbol is that front k-1 modulation accords with described 1st modulation symbol with described m-1 modulation symbol The symbol obtaining after number successively adding up superposition.

Further, the constellation point that described k-th modulation symbol is formed is formed according to front superposition symbol Constellation point carries out mirror image operation, comprising:

Constellation zone position in dummy constellation coordinate for the constellation point according to the formation of described front superposition symbol determines Mirror image operation mode to described k-th modulation symbol, with determined by mirror image operation mode to described kth The constellation point that individual modulation symbol is formed carries out mirror image operation；Described dummy constellation coordinate is accorded with by described front superposition Number constellation point being formed obtains, the corresponding a kind of mirror image operation in each the constellation district in described dummy constellation coordinate Mode.

Further, the constellation point that described dummy constellation coordinate is formed by described front superposition symbol obtains, institute State the corresponding a kind of mirror image operation mode in each the constellation district in dummy constellation coordinate, refer to:

Described dummy constellation coordinate overlaps with the described front coordinate superposing the planisphere that symbol is formed, described void Intending comprising in constellation multiple equal-sized constellation district, the constellation point that described front superposition symbol is formed exists Position in dummy constellation coordinate is the central point in one of them constellation district, each constellation district non-overlapping copies；

Constellation district and vertical direction interval with one constellation district, initial fixed signs district horizontal direction interval The constellation district in one constellation district is the first fixed signs district, and between described first fixed signs district horizontal direction Being spaced the constellation district in a constellation district every the constellation district in a constellation district and vertical direction is second to fix star Seat district, by that analogy；The mirror image operation mode in all fixed signs districts is not overturn, other constellation districts Mirror image operation mode includes: the mirror image operation mode in the level adjacent constellation district in fixed signs district is that level is turned over Turning, the mirror image operation mode vertically adjacent to constellation district in fixed signs district is flip vertical, fixed signs district The mirror image operation mode in adjacent constellation district, diagonal angle be flip horizontal and flip vertical.

Further, described m information to be sent is modulated respectively, comprising:

The modulation system being modulated m information to be sent is identical or different, pending delivers letters to the 1st Breath use one of following modulation system be modulated obtaining described 1st modulation symbol: BPSK, QPSK, QAM, the modulation system being modulated other information to be sent includes one below: QPSK, QAM.

Further, corresponding m the user equipment of described m information to be sent, wherein each pending is delivered letters The corresponding user equipment of breath, described m user equipment is belonging respectively to different classes of, described classification foundation User equipment divides with the distance of consolidated network side apparatus；

When accumulative superposition, by described m the modulation symbol obtaining according to the corresponding use of described modulation symbol Family equipment adds up to superpose with the order that described network equipment distance draws near successively；

Described 1st modulation symbol is apart from the farthest corresponding tune of user equipment with described network equipment Symbol processed.

For solving above-mentioned technical problem, present invention also offers a kind of descending multi-user information transmitting apparatus, Including modulation module, optimization stack module, transmitter module, wherein:

Described modulation module, for being modulated m information to be sent respectively, obtains m modulation symbol Number, m is the positive integer more than 2；

Described optimization stack module, for described m the modulation symbol obtaining is added up successively superposition, folded During adding, in addition to the 1st modulation symbol, remaining m-1 modulation symbol first carries out mirror before superposition As optimizing；

Described transmitter module, launches signal for forming the symbol after described accumulative superposition successively, passes through Emitter sends.

Another technical problem that the invention solves the problems that is to provide a kind of descending multi-user message receiving method and dress Put, only need to be 1 SIC, improve the performance that multiple access accesses, reduce complexity.

In order to solve above-mentioned technical problem, the invention provides a kind of descending multi-user message receiving method, Including:

Receiving and launching signal, the symbol that described transmitting signal carries is added up superposition successively by m modulation symbol Obtaining, in additive process, in addition to the 1st modulation symbol, remaining m-1 modulation symbol is first before superposition Carrying out mirror image optimization, m is the positive integer more than 2；

When demodulating the 1st modulation symbol, the symbol that directly demodulation transmitting signal carries obtains raw modulation symbol Number；When demodulating remaining m-1 modulation symbol, the symbolic solution first carrying from transmitting signal recalls partial symbols, After removing described partial symbols from the symbol that transmitting signal carries, re-demodulation once obtains symbol to be optimized, Anti-mirror image is carried out to described symbol to be optimized and obtains raw modulation symbols.

Further, when demodulating the 1st modulation symbol, the symbol that signal carries is launched in described direct demodulation, Including:

The symbol that interference demodulation described transmitting signal with other m-1 modulation symbol carries, directly obtains Described 1st modulation symbol.

Further, when demodulating remaining m-1 modulation symbol, described elder generation is from launching the symbol that carries of signal Demodulate partial symbols, after removing described partial symbols from the symbol that transmitting signal carries, re-demodulation one Secondary obtain symbol to be optimized, comprising:

For k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, according to demodulation letter Breath, demodulates what described transmitting signal carried with k-th modulation symbol to disturbing of m-1 modulation symbol Symbol, obtains front superposition symbol, and described front superposition symbol is described 1st modulation symbol and described m-1 Symbol after front k-1 modulation symbol adds up superposition successively in individual modulation symbol, carries from described transmitting signal Symbol in remove described front superposition symbol, the symbol that obtains after removing once is demodulated again, obtains The symbol to be optimized of k-th symbol.

Further, described anti-mirror image carried out to described symbol to be optimized obtain raw modulation symbols, comprising:

For k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, before described Constellation zone position in dummy constellation coordinate for the constellation point that superposition symbol is formed determines to described k-th tune The mirror image operation mode of symbol processed, according to determined by mirror image operation mode to described k-th modulation symbol The constellation point being formed carries out anti-mirror image operation；Described dummy constellation coordinate is formed by described front superposition symbol Constellation point obtains, the corresponding a kind of mirror image operation mode in each the constellation district in described dummy constellation coordinate.

Described dummy constellation coordinate overlaps with the described front coordinate superposing the planisphere that symbol is formed, described void Intending comprising in constellation multiple equal-sized constellation district, the constellation point that described front superposition symbol is formed exists Position in dummy constellation coordinate is the central point in one of them constellation district, and each constellation district of division does not weighs mutually Folded；

Further, described demodulating information includes described 1st modulation symbol and described m-1 modulation symbol The modulation system of front k-1 modulation symbol and power allocation factor in number.

Further, described m modulation symbol corresponding m user equipment respectively, wherein each modulation symbol Number one user equipment of correspondence, described m user equipment is belonging respectively to different classes of, described classification foundation User equipment divides with the distance of consolidated network side apparatus；

Described m modulation symbol adds up superposition successively and refers to: described m modulation symbol is according to described modulation The corresponding user equipment of symbol adds up to superpose with the order that described network equipment distance draws near successively；

For solving above-mentioned technical problem, present invention also offers a kind of descending multi-user information receiver, Including: receiver module, the first demodulation module, the second demodulation module, wherein:

Described receiver module, is used for receiving transmitting signal, and the symbol that described transmitting signal carries is by m tune Symbol processed adds up superposition successively and obtains, in additive process, in addition to the 1st modulation symbol, and remaining m-1 Modulation symbol first carries out mirror image optimization before superposition, and m is the positive integer more than 2；

Described first demodulation module, for the 1st modulation symbol of demodulation, during demodulation, directly demodulation is launched The symbol that signal carries obtains raw modulation symbols；

Described second demodulation module, is used for demodulating remaining m-1 modulation symbol, during demodulation, first from transmitting The symbolic solution that signal carries recalls partial symbols, removes described part symbol from launching the symbol that signal carries After number, re-demodulation once obtains symbol to be optimized, carries out anti-mirror image to described symbol to be optimized and obtains original Modulation symbol.

The embodiment of the present invention proposes the modulation symbol optimization stack coding techniques of a kind of multi-user information, with And receiving terminal corresponding single symbol level SIC demodulation technology.The modulation symbol of multi-user information passes through mirror image In " whole passage " upper transmission after superposition, the receiver at edge demodulates with the interference of other all users, Other users use single symbol level SIC demodulation.The descending multi-user information that the embodiment of the present invention proposes passes Transmission method, the constellation point making the symbol after the modulation symbol superposition of transmitting terminal multi-user information be formed has lattice Thunder attribute mapping, and make receiving terminal central user have only to be 1 SIC, the performance that multiple access accesses can be improved, Reduce complexity, time delay.

Other features and advantages of the present invention will illustrate in the following description, and, partly from froming the perspective of Bright book becomes apparent, or is understood by implementing the present invention.The purpose of the present invention is excellent with other Point can be realized by structure specifically noted in specification, claims and accompanying drawing and obtain.

Brief description

Accompanying drawing is used for providing being further appreciated by technical solution of the present invention, and constitutes one of specification Point, it is used for explaining technical scheme together with embodiments herein, be not intended that to the present invention The restriction of technical scheme.

Fig. 1 a-b is the schematic diagram of the direct supercomposed coding of 3 subscriber signals in prior art；

Fig. 2 is the embodiment of the present invention one sending method flow chart；

Fig. 3 is the embodiment of the present invention one dispensing device structural representation；

Fig. 4 is the embodiment of the present invention two method of reseptance flow chart；

Fig. 5 is that the embodiment of the present invention two receives apparatus structure schematic diagram；

Fig. 6 is application example one wireless broadcast communication system schematic of the present invention；

Fig. 7 is the operation chart that application example one base station of the present invention completes；

Fig. 8 a-b is the planisphere of symbol after two symbol constellation to be superimposed and two symbol superpositions；

Fig. 9 a-b is the planisphere of symbol after the symbol to be superimposed after carrying out mirror image optimization and superposition；

Figure 10 a-c be application example one optimization stack of the present invention after symbol constellation；

Figure 11 is application example two receiver structure schematic diagram of the present invention；

Figure 12 a-c be application example three optimization stack of the present invention after symbol constellation.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing Embodiments of the invention are described in detail.It should be noted that in the case of not conflicting, this Shen Embodiment in please and the feature in embodiment can mutually be combined.

Can be at the computer of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing System performs.And, although show logical order in flow charts, but in some cases, Shown or described step can be performed with the order being different from herein.

Embodiment one

The present embodiment describes descending multi-user method for sending information, as in figure 2 it is shown, comprise the following steps:

Step 110, is modulated respectively to m information to be sent, obtains m modulation symbol, and m is Positive integer more than 2；

The modulation system being modulated m information to be sent is identical or different, pending delivers letters to the 1st Breath uses one of following modulation system to be modulated obtaining the 1st modulation symbol: BPSK, QPSK, QAM, The modulation system being modulated other information to be sent includes one below: QPSK, QAM.

M information to be sent m user equipment of correspondence, the wherein corresponding user of each information to be sent Equipment, this m user equipment is belonging respectively to different classes of, and described classification is according to user equipment and same net The distance of network side apparatus divides.Such as network equipment is base station, the covering model centered on base station Enclosing and being divided into m level region according to the distance with base station, the user equipment in every 1 grade of region is a class User equipment.For example can divide 3 grades of regions, comprising: fringe region, zone line, central area, The class user equipment being positioned at fringe region is edge customer equipment, and the class user being positioned at zone line sets Standby for intermediate User Equipments, it is positioned at user equipment centered on a class user equipment of central area.Now, m Individual information to be sent includes the information to be sent of an edge customer equipment, treating of an intermediate User Equipments Transmission information and the information to be sent of a central user equipment.

Described m the modulation symbol obtaining is added up superposition by step 120 successively, during superposition, In addition to the 1st modulation symbol, remaining m-1 modulation symbol first carries out mirror image optimization before superposition；

Specifically, above-mentioned accumulative superposition successively refers to: carry out mirror image optimization to the 2nd modulation symbol, will 1st modulation symbol superposes with the 2nd modulation symbol after mirror image optimization and obtains symbol s1, to the 3rd Modulation symbol carries out mirror image optimization, superposes described symbol s1 with the 3rd modulation symbol after mirror image optimization Obtain s2, by that analogy, until all m modulation symbol all superpositions are complete.Preferably, in accumulative superposition When, by m modulation symbol according to the corresponding user equipment of each modulation symbol and described network equipment distance The order drawing near adds up superposition successively, and for example, described 1st modulation symbol is and described network side Equipment apart from the farthest corresponding modulation symbol of user equipment, the 2nd modulation symbol is and described network side The remote corresponding modulation symbol of user equipment of equipment distance time, by that analogy.As a example by m=3, the 1st Modulation symbol is the corresponding modulation symbol of edge customer equipment, and the 2nd modulation symbol is intermediate User Equipments Corresponding modulation symbol, the corresponding modulation symbol of user equipment centered on the 3rd modulation symbol.

As a example by k-th modulation symbol in remaining m-1 modulation symbol (k=1 ... m-1), carry out Mirror image optimization includes: click through the constellation that superposition symbol before the constellation point of k-th modulation symbol formation is formed Row mirror image operation.Front superposition symbol is described 1st modulation symbol and front k-1 in m-1 modulation symbol Symbol after the accumulative superposition successively of individual modulation symbol, wherein: the 1st modulation symbol is m modulation symbol In the 1st modulation symbol；In m-1 modulation symbol, front k-1 modulation symbol refers to m-1 modulation symbol The 1st modulation symbol in number is to-1 modulation symbol of kth.Unless otherwise indicated, literary composition described in the 1st Modulation symbol refers both to the 1st modulation symbol in m modulation symbol.

Specifically, constellation district in dummy constellation coordinate for the constellation point according to the formation of described front superposition symbol Position determines mirror image operation mode to described k-th modulation symbol, with determined by mirror image operation mode The constellation point forming described k-th modulation symbol carries out mirror image operation.Described dummy constellation coordinate is by institute The constellation point stating the formation of front superposition symbol obtains, each the constellation district correspondence one in described dummy constellation coordinate Plant mirror image operation mode.The constellation point determining the formation of described front superposition symbol is positioned in dummy constellation coordinate Constellation zone position, the mirror image operation mode in this constellation district be the mirror image to this k-th modulation symbol behaviour Make mode.

Each constellation district corresponding mirror image behaviour in described dummy constellation coordinate and described dummy constellation coordinate Mode of making determines in the following ways:

(1) first determine dummy constellation coordinate, and dummy constellation coordinate is divided into multiple constellation district

Described dummy constellation coordinate and the described front coordinate superposing the planisphere that symbol is formed overlap, by described Dummy constellation coordinate is divided into multiple equal-sized constellation district, the constellation point that described front superposition symbol is formed Position in dummy constellation coordinate is the central point in one of them constellation district, each constellation district non-overlapping copies；

(2) the mirror image operation mode in each constellation district is determined

Any one constellation district in described dummy constellation coordinate all can as initial fixed signs district, with The constellation district in one constellation district, horizontal direction interval, described initial fixed signs district and vertical direction interval one The constellation district in individual constellation district is the first fixed signs district, with described first horizontal direction interval, fixed signs district The constellation district in one the constellation district in the constellation district in one constellation district and vertical direction interval is the second fixed signs District, by that analogy；The mirror image operation mode in all fixed signs districts is not overturn, the mirror in other constellation districts As according to following mirror image operation mode, mode of operation determines that principle determines: the adjacent star of level in fixed signs district The mirror image operation mode in seat district is flip horizontal, the mirror image operation vertically adjacent to constellation district in fixed signs district Mode is flip vertical, and the mirror image operation mode in the adjacent constellation district, diagonal angle in fixed signs district is flip horizontal And flip vertical.

The adjacent constellation district, diagonal angle in fixed signs district includes: the constellation district in the upper left corner, fixed signs district, fixing The constellation district in the upper right corner, constellation district, the constellation district in the lower left corner, fixed signs district, the lower right corner, fixed signs district Constellation district.

Symbol after described accumulative superposition successively is formed and launches signal, sent by emitter by step 130.

Realize the dispensing device of said method as it is shown on figure 3, include modulation module the 210th, optimization stack module 220th, transmitter module 230, wherein:

Described modulation module 210, for being modulated m information to be sent respectively, obtains m tune Symbol processed, m is the positive integer more than 2；

Described optimization stack module 220, for described m the modulation symbol obtaining is added up successively superposition, During superposition, in addition to the 1st modulation symbol, remaining m-1 modulation symbol is first carried out before superposition Mirror image optimizes；

Described transmitter module 230, launches signal for forming the symbol after described accumulative superposition successively, logical Cross emitter to send.

Described m information to be sent m user equipment of correspondence, wherein corresponding of each information to be sent User equipment, i.e. each information to be sent are the information being sent to a corresponding user equipment.Described m Individual user equipment is belonging respectively to different classes of, and described classification is according to user equipment and consolidated network side apparatus Distance divides.When accumulative superposition, described optimization stack module 220 is by described m the tune obtaining Symbol processed draws near according to the corresponding user equipment of described modulation symbol and described network equipment distance Order adds up superposition successively.For example described 1st modulation symbol is farthest with described network equipment distance The corresponding modulation symbol of user equipment, the 2nd modulation symbol is remote with described network equipment distance time The corresponding modulation symbol of user equipment, by that analogy.Described optimization stack module when accumulative superposition, Mirror image optimization is carried out to the 2nd modulation symbol, the 2nd after the 1st modulation symbol is optimized with mirror image Modulation symbol superposition obtains symbol s1, carries out mirror image optimization to the 3rd modulation symbol, by described symbol s1 Superpose with the 3rd modulation symbol after mirror image optimization and obtain s2, by that analogy, until all m modulation Symbol all superpositions are complete.

The modulation system that m information to be sent is modulated by described modulation module 210 is identical or different, One of following modulation system can be used to be modulated obtaining described 1st tune to the 1st information to be sent Symbol processed: BPSK, QPSK, QAM, other information to be sent are modulated by described modulation module Modulation system includes one below: QPSK, QAM.

As a example by k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, described optimization The constellation point that described k-th modulation symbol is formed is formed by laminating module 220 according to described front superposition symbol Constellation point carry out mirror image operation, described front superposition symbol is described 1st modulation symbol and described m-1 The symbol that in individual modulation symbol, front k-1 modulation symbol obtains after adding up superposition successively.Specifically, described excellent Change constellation in dummy constellation coordinate for the constellation point that laminating module 220 formed according to described front superposition symbol Zone position determines mirror image operation mode to described k-th modulation symbol, with determined by mirror image operation side The constellation point that described k-th modulation symbol is formed by formula carries out mirror image operation.Described dummy constellation coordinate Determine the determination of each constellation district corresponding mirror image operation mode in mode and described dummy constellation coordinate Mode is with described in method.

Use sending method and the device of the present embodiment, owing to first mirror having been carried out to modulation symbol before superposition As processing, hence in so that the symbol after superposition is provided with gray mappings attribute, substantially increase modulating performance.

Embodiment two

The present embodiment describes the descending multi-user message receiving method corresponding to above-described embodiment sending method, As shown in Figure 4, comprising:

Step 310, receives and launches signal, and the symbol that described transmitting signal carries is depended on by m modulation symbol Secondary accumulative superposition obtains, in additive process, in addition to the 1st modulation symbol, and remaining m-1 modulation symbol First carrying out mirror image optimization before superposition, m is the positive integer more than 2；

Described m modulation symbol corresponding m user equipment, wherein corresponding of each modulation symbol respectively User equipment, i.e. each modulation symbol are the modulation symbol being sent to relative user equipment.Described m use Family equipment is belonging respectively to different classes of, and described classification is according to the distance of user equipment and consolidated network side apparatus Far and near division.Described m modulation symbol adds up superposition successively and refers to: described m modulation symbol is according to institute State the corresponding user equipment of modulation symbol to add up successively with the order that described network equipment distance draws near Superposition.Described 1st modulation symbol is corresponding apart from farthest user equipment with described network equipment Modulation symbol.

Step 320, during the 1st modulation symbol of demodulation, the symbol that directly demodulation transmitting signal carries obtains former Beginning modulation symbol；When demodulating remaining m-1 modulation symbol, the symbolic solution first carrying from transmitting signal recalls Partial symbols, after removing described partial symbols from the symbol that transmitting signal carries, re-demodulation once obtains Symbol to be optimized, carries out anti-mirror image to described symbol to be optimized and obtains raw modulation symbols.

In above-mentioned steps 320, during the 1st modulation symbol of demodulation, described direct demodulation is launched signal and is taken The symbol of band, refers to: the symbol that the interference demodulation described transmitting signal with other m-1 modulation symbol carries Number, directly obtain described 1st modulation symbol.

In above-mentioned steps 320, when demodulating remaining m-1 modulation symbol, described elder generation takes from launching signal The symbolic solution of band recalls partial symbols, after removing described partial symbols from the symbol that transmitting signal carries, Re-demodulation once obtains symbol to be optimized, refers to:

For k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, carry k-th tune Symbol processed demodulates, to the interference of m-1 modulation symbol, the symbol that described transmitting signal carries, further according to solution Tune information, obtains front superposition symbol, in i.e. described 1st modulation symbol and described m-1 modulation symbol Symbol after the accumulative superposition successively of front k-1 modulation symbol, removes from the symbol that described transmitting signal carries Described front superposition symbol, once demodulates to obtaining symbol after removal again, carries kth+1 during demodulation Symbol, to the interference demodulation of m-1 symbol, obtains the symbol to be optimized of k-th symbol.Described demodulation Information includes described 1st modulation symbol and front k-1 modulation symbol in described m-1 modulation symbol Modulation system and power allocation factor.Demodulating information is obtained by signaling.

As a example by k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, illustrate how Carry out anti-mirror image to described symbol to be optimized and obtain raw modulation symbols:

Constellation zone position in dummy constellation coordinate for the constellation point according to the formation of described front superposition symbol determines Mirror image operation mode to described k-th modulation symbol, according to determined by mirror image operation mode to described The constellation point of k-th modulation symbol formation carries out anti-mirror image operation.The determination side of described dummy constellation coordinate The determination mode of each the constellation district corresponding mirror image operation mode in formula and described dummy constellation coordinate is same Described in embodiment one, here is omitted.

Realizing the reception device of above-mentioned method of reseptance as shown in Figure 5, comprising: receiver module 410, first solves Mode transfer block 420, the second demodulation module 430, wherein:

Described receiver module 410, is used for receiving transmitting signal, and the symbol that described transmitting signal carries is by m Individual modulation symbol adds up superposition successively and obtains, in additive process, in addition to the 1st modulation symbol, and remaining m-1 Individual modulation symbol first carries out mirror image optimization before superposition, and m is the positive integer more than 2；

Described first demodulation module 420, for the 1st modulation symbol of demodulation, during demodulation, direct solution is readjusted the distribution Penetrate the symbol that signal carries and obtain raw modulation symbols；

Described second demodulation module 430, is used for demodulating remaining m-1 modulation symbol, during demodulation, first from sending out Penetrate the symbolic solution that signal carries and recall partial symbols, remove described part from launching the symbol that signal carries After symbol, re-demodulation once obtains symbol to be optimized, carries out anti-mirror image to described symbol to be optimized and obtains former Beginning modulation symbol.

For the 1st modulation symbol, described first demodulation module 420 is with other m-1 modulation symbol The symbol that interference demodulation described transmitting signal carries, directly obtains described 1st modulation symbol.

For remaining m-1 modulation symbol, as a example by k-th modulation symbol therein, k=1 ... m-1, Described second demodulation module 430, according to demodulating information, carries k-th modulation symbol to the m-1 modulation symbol Number the interference demodulation described transmitting symbol that carries of signal, obtain front superposition symbol, i.e. described 1st tune Symbol processed adds up the symbol after superposing successively with-1 modulation symbol of kth in described m-1 modulation symbol, Remove described front superposition symbol from the symbol that described transmitting signal carries, to the symbol obtaining after removing again Once demodulate, obtain the symbol to be optimized of k-th symbol.Described demodulating information includes the described 1st The modulation system of front k-1 the modulation symbol in individual modulation symbol and described m-1 modulation symbol and work( Rate distribution factor.Demodulating information is sent to receive device by signaling.

As a example by continuing k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, described Second demodulation module 430 carries out anti-mirror image to described symbol to be optimized in the following ways and obtains raw modulation Symbol, the constellation point that described second demodulation module 430 is formed according to described front superposition symbol is at dummy constellation Constellation zone position in coordinate determines the mirror image operation mode to described k-th modulation symbol, according to really The constellation point that described k-th modulation symbol is formed by fixed mirror image operation mode carries out anti-mirror image operation.Institute State each the corresponding mirror in constellation district in the determination mode of dummy constellation coordinate and described dummy constellation coordinate As the determination mode of mode of operation is with described in embodiment one.

Launch corresponding m the user equipment respectively of m modulation symbol in signal, wherein each modulation symbol A corresponding user equipment, described m user equipment is belonging respectively to different classes of, and described classification is according to use Family equipment divides with the distance of consolidated network side apparatus；Each user equipment sets with network according to oneself The distance of standby distance uses corresponding demodulation module to be demodulated, for example, the 1st modulation symbol for institute State network equipment apart from the farthest corresponding modulation symbol of user equipment 1, then connecing in user equipment 1 Receiving apparatus uses demodulation module 1 to demodulate, and the reception device in remaining m-1 user equipment uses and solves mode transfer Block 2 demodulates.

Use method of reseptance and the device of the present embodiment, owing to first demodulating partial symbols when demodulation, connect Terminating subscriber has only to be 1 SIC, can improve the performance that multiple access accesses, and reduces complexity, time delay.

Below by several application examples, above-described embodiment is specifically described.

Application example one

Fig. 6 is a kind of wireless broadcast communication implementing embodiment of the present invention descending multi-user information transferring method System schematic.As shown in Figure 6, multi-user information is broadcast to multiple user equipment by base station BS.Specifically , after 3 class user profile modulation symbol optimization stacks, formed and launch signal, be sent simultaneously to 3 classes and use Family UE1, UE2, UE3, it is assumed that 3 class users are respectively edge customer UE1, intermediate user UE2, Central user UE3.Launch signal respectively simultaneously through channel H1, H2, H3.Letter between UE1 and BS Road becomes more preferable successively to the channel between UE3 and BS, is expressed as H1 < H2 < H3.

At the transmitting terminal of wireless broadcast communication system, the operation i.e. completing in base station as it is shown in fig. 7, comprises Following steps:

Step one, multi-user information bit stream is encoded the modulation symbol being modulated to have certain power.Compile Code mode includes Turbo coding (be encoded to can selection operation).The message bit stream of UE1 is used QPSK Modulation system obtains the 1st class modulation symbol Sym1, is used QPSK modulation by the message bit stream of UE2 Mode obtains the 2nd class modulation symbol Sym2, is used 16QAM modulation system by the message bit stream of UE3 Obtaining the 3rd class modulation symbol Sym3, wherein, Sym1, Sym2, Sym3 are by the modulation of power normalizing Symbol is multiplied by a power adjusting factor gained.The power adjusting factor assuming Sym1 isSym2 Power adjusting factor beThe power adjusting factor of Sym3 isThen Sym1 can be expressed asSym2 can be expressed asSym3 can be expressed as Wherein, (x+y i) is plural number expression way.

Step 2, by above 2 class modulation symbol optimization stacks, the i.e. the 1st class modulation symbol and mirror image optimization After the 2nd class modulation symbol superposition, obtain the symbol S2 after optimization stack.Symbol after described optimization stack The constellation point that number S2 is formed has gray mappings attribute.

Fig. 8 a and b show and does not carries out symbol constellation, wherein Fig. 8 a after mirror image optimization symbol constellation and superposition In two symbols be added the symbol obtaining in Fig. 8 b.Planisphere herein is possible to feelings by containing Planisphere under condition, as shown in Figure 8 b, the symbol constellation obtaining after superposition does not has Gray's attribute.

Fig. 9 a and b show the symbol constellation of optimization stack, and wherein (Fig. 9 a is left for the symbol 1 in Fig. 9 a Side symbol constellation) superpose the symbol obtaining in Fig. 9 b, symbol with symbol 2 (symbol constellation on the right side of Fig. 9 a) 2 is the symbol after mirror image optimization.A certain moment symbol 1 is 01, the star of dummy constellation coordinate and symbol 1 Seat coordinate overlaps, it is assumed that this Li Zhong fixed signs district is the first quartile of symbol 1 planisphere, then due to symbol Number 1 is 01 to be positioned at the second quadrant, the i.e. level in fixed signs district adjacent constellation district, therefore mirror image switch side Formula is flip horizontal, carries out flip horizontal to symbol 2, after upset as shown in planisphere on the right side of Fig. 9 a.Symbol Number 1 superpose with the symbol 2 after mirror image optimization after the planisphere that formed of the symbol that obtains as shown in figure 9b, Comprise all possible in the case of, the symbol constellation obtaining after superposition has gray mappings attribute.

Step 3, by above 3 class modulation symbol optimization stacks, obtains the symbol S3 after optimization stack.Bag Include and first the 3rd class modulation symbol is done mirror image optimization according to S2 (as shown in Figure 10 a), obtain such as Figure 10 b Shown constellation, more directly superpose with S2, obtain the symbol S3 after optimization stack, as shown in figure l oc.Institute The constellation point stating the formation of the symbol S3 after optimization stack has gray mappings attribute.

Specifically, first, the 3rd class modulation symbol is done mirror image optimization according to S2.I.e. according to symbol S2 Constellation zone position in dummy constellation coordinate for the current time constellation point determines mirror image operation mode (constellation district Corresponding mirror image operation mode predefines), the 3rd class modulation symbol is done flip horizontal and/or vertically turns over Turn and obtain the 3rd class modulation symbol after mirror image optimizes.Described flip horizontal or flip vertical refer to virtual On constellation, using the vertical center line in constellation district or horizontal center line as line of symmetry, the 3rd class is adjusted Symbol processed, will do symmetrical change by 16QAM constellation.

Figure 10 a be optimization stack after S2, figure lists all possible situation, any instant only has One constellation point, in scheming as a example by constellation point " 0101 ", the dotted line coordinate in Figure 10 b is and S2 constellation The dummy constellation coordinate that in figure, coordinate overlaps, in figure, each little coordinate is considered as a constellation district, in this example Initial fixed signs district is constellation district, first, the upper left corner." 0101 " position be may determine that correspondence Constellation district be second constellation district of Figure 10 b first row, i.e. first shadow region in figure, this constellation district pair The mirror image operation answered is flip horizontal, then carry out flip horizontal to the 3rd class modulation symbol, in Figure 10 b One shadow region show upset after constellation, after the 3rd class modulation symbol after the optimization of S2 and mirror image superposes The symbol obtaining first shadow region of Figure 10 c is S3.In another embodiment, initial fixed signs District also can be constellation district, first, the upper right corner, and at a time, S2 is " 1101 " in Figure 10 a, Second dash area in corresponding diagram 10b, the corresponding mirror image operation of this dash area is flip horizontal, right 3rd class modulation symbol carries out flip horizontal, the constellation after second shadow region show upset in Figure 10 b, S2 obtains second shadow region of Figure 10 c with the 3rd class modulation symbol after mirror image optimization symbol after superposing is For S3.

Then, by the 3rd class modulation symbol superposition after S2 and optimization, the symbol S3 after optimization stack is obtained.

Symbol S3 after optimization stack is formed and launches signal, is sent simultaneously to the 1st class user by step 4 UE1, the 2nd class user UE2 and the 3rd class user UE3.

The situation of the direct superposition of comparison diagram 1, is Gray by the symbol S3 after the present embodiment method optimization stack Map, and, it is even more important that even if at receiver because noise has judged symbol S2 by accident, to the The mirror image that tries again after the modulation symbol demodulation of 3 class optimizations remains able to correctly demodulate the 3rd class modulation symbol Number, thus the performance of central user has clear improvement.

Application example two

Figure 11 is according to a kind of receiver structure schematic diagram.As shown in figure 11, receiver includes: receive Module, demodulation module and decoder module (optional).(in Figure 11 dotted line frame, this part of expression is can modeling Block)

Assume emitter as described in application example one, then the operation that receiver completes includes:

Step one, receives the symbol after superposition, and the symbol after described superposition is front 3 class modulation symbol optimizations Symbol S3 after superposition, m class modulation symbol is formed by the modulates information to be sent of m class user equipment, M=1,2,3.In this example, the corresponding modulation symbol of UE1 is first kind modulation symbol, the corresponding modulation of UE2 Symbol is Equations of The Second Kind modulation symbol, and the corresponding modulation symbol of UE3 is the 3rd class modulation symbol.

Step 2, comprising:

User's UE1 receiver, by demodulation module 1, with in addition to first kind modulation symbol, other own The interference demodulation of modulation symbol, obtains the modulation symbol of user's UE1 information；

User's UE2 receiver, by demodulation module 1, with in addition to first kind modulation symbol, other own The interference demodulation of modulation symbol, obtains the modulation symbol of user's UE1 information；

User's UE3 receiver, by demodulation module 1, with modulation symbol dry of user's UE3 information Disturbing demodulation, modulation system and power allocation factor further according to front 2 class symbols (are used for determining that front 2 classes are adjusted Position in coordinate for the constellation point that symbol after symbol processed accumulative superposition successively is formed), demodulate user The optimization stack symbol S ' of the modulation symbol of the modulation symbol of UE1 information and user's UE2 information.

Modulation system and power allocation factor can be by signaling to UE3 receiver.

Step 3, comprising:

User's UE2 receiver, by demodulation module 2, is single symbol level SIC, removes user UE1 The modulation symbol of information, i.e. removes the maximum QPSK symbol of mean power, isolates user's UE2 information Modulation symbol and the optimization stack symbol of modulation symbol of user's UE3 information, this superposition symbol is permissible Regard a QPSK symbol with 16QAM symbol-interference as.Then intermediate user UE2 receiver With the interference demodulation of the modulation symbol of UE3 information, further according to the user UE1 letter out of solution in step 2 The modulation symbol of breath does mirror image, and described mirror method is consistent with the mirror method in emitter；

User's UE3 receiver, by demodulation module 2, is single symbol level SIC, removes symbol S ', i.e. Remove the modulation symbol of user's UE1 information and the optimization stack symbol of the modulation symbol of user's UE2 information, I.e. removing 16 constellation symbol, described 16 constellation symbol include 16QAM constellation symbol.Then center User's UE3 receiver does mirror image, described mirror method and the mirror image side in emitter further according to symbol S ' Method is consistent.

Step 4, decoding (or not decoding) obtains user profile bit stream.

Although the receiver that this example distinguishes each UE illustrates respectively, but owing to UE is likely located at any position Putting, therefore, UE1 receiver also can have the ability of UE2 and UE3 receiver, and in like manner UE2 receives Machine also can have the ability of UE1 and UE3 receiver, UE3 receiver also can have UE1 receiver and The ability of UE2 receiver.

In other preferred exemplary, if m=4, it is assumed that receiving symbol would be S3, S3=S2+d ', wherein d ' Modulation symbol d, S2=S1+c ' after optimizing for mirror image, wherein c ' is the modulation symbol c after mirror image optimizes, S1=a+b ', wherein b ' is the modulation symbol b after mirror image optimizes, and a is the 1st modulation symbol, modulation symbol Number a, b, c, d corresponding UE the 1st, UE2, UE3 and UE4 respectively, UE1 is farthest with the distance of base station, Next to that UE2, being UE3 again, UE4 distance base station is nearest.When demodulating modulation symbol d, according to The demodulating information (described demodulating information includes modulation system and power allocation factor) of a, b and c, band is adjusted The interference demodulation of symbol d processed, obtains S2, removes S2, obtain d ' from S3, then does anti-mirror image and obtain Modulation symbol d.During demodulation modulation symbol c, according to the demodulating information of a, b, carry modulation symbol c and d Interference demodulation, obtain S1, from S3, remove S1, then the interference with modulation symbol d is to removing after S1 Symbol be demodulated obtaining c ', do anti-mirror image and obtain modulation symbol c.During demodulation modulation symbol b, band is adjusted The interference demodulation of symbol b, c and d processed, obtains modulation symbol a, removes modulation symbol a from S3, then Symbol after removal a is demodulated obtaining b ' by the interference with modulation symbol c and d, does anti-mirror image and obtains Modulation symbol b.During demodulation modulation symbol a, the directly interference demodulation with modulation symbol b, c and d, To modulation symbol a.

By tradition SIC demodulation situation, central user UE3 receiver needs to be symbol level SIC (K twice Need to be K-1 time during individual user), and have only to do 1 symbol by the present embodiment method receiving terminal central user Number level SIC, can improve the performance that multiple access accesses, and reduces complexity, time delay.

Application example three

In this application example, after 3 class user profile modulation symbol optimization stacks, formed and launch signal, quilt It is sent simultaneously to 3 class users, it is assumed that 3 class users are respectively edge customer UE1, intermediate user UE2, Central user UE3.Launch signal respectively simultaneously through channel H1, H2, H3.Letter between UE1 and BS Road becomes more preferable successively to the channel between UE3 and BS, is expressed as H1 < H2 < H3.

Step one is consistent with the step one of application example one, and UE1 information bit uses BPSK modulation system Obtaining the 1st class modulation symbol Sym1, UE2 information bit uses QPSK modulation system to obtain the 2nd class and adjusts Symbol Sym2 processed, UE3 information bit uses QPSK modulation system to obtain the 3rd class modulation symbol Sym3. Sym1 can be expressed asSym2 can be expressed asSym3 can To be expressed as

Step 2 is consistent with the step 2 of application example one, and by above 2 class modulation symbols, the i.e. the 1st class is adjusted The 2nd class modulation symbol superposition after symbol processed and mirror image optimization, obtains the symbol S2 after optimization stack, as Shown in Figure 12 a.

Step 3 is consistent with the step 3 of application example one, by above 3 class modulation symbol optimization stacks, Symbol S3 after optimization stack, as shown in Figure 12b.

Specifically, first, the 3rd class modulation symbol is done mirror image optimization according to S2.I.e. according to symbol S2 3rd class is adjusted by constellation zone position mirror image operation mode in dummy constellation coordinate for the current time constellation point Symbol processed does flip horizontal and/or flip vertical obtains the 3rd class modulation symbol after mirror image optimizes.Described water Flat upset or flip vertical refer on dummy constellation coordinate, with in the vertical center line in constellation district or level Heart line is as line of symmetry, and by the 3rd class modulation symbol, i.e. QPSK constellation does symmetrical change.In Figure 12 b Two pieces of shaded side shown in the mirror image optimum results that is respectively in two examples of constellation district, in two examples Initial fixed signs district is different, the 3rd class in this two examples optimize modulation symbol respectively with in Figure 12 a The constellation that the symbol obtaining after S2 superposition is formed is as shown in two pieces of shaded side in Figure 12 c.

Step 4, consistent with the step 4 of application example one, the symbol S3 after optimization stack is formed and launches Signal, is sent simultaneously to the 1st class user UE1, the 2nd class user UE2 and the 3rd class user UE3.

The embodiment of the present invention proposes the modulation symbol optimization stack coding techniques of a kind of multi-user information, and Receiving terminal corresponding single symbol level SIC demodulation technology.Purpose is in order in the transmission of descending multi-user information In system, the constellation point of the symbol formation after the modulation symbol superposition of transmitting terminal multi-user information has Gray Attribute mapping, and make each user of receiving terminal have only to do 1 sub-symbol level SIC, improve the property that multiple access accesses Can, reduce complexity, time delay.

Although the embodiment that disclosed herein is as above, but described content only readily appreciates the present invention And the embodiment using, it is not limited to the present invention.Technology people in any art of the present invention Member, on the premise of without departing from the spirit and scope that disclosed herein, can be in the form implemented and thin Carry out any modification and change on joint, but the scope of patent protection of the present invention, still must be with appended right Claim is defined in the range of standard.

Claims

1. a descending multi-user method for sending information, it is characterised in that include:

2. sending method according to claim 1, it is characterised in that

Described by described m the modulation symbol obtaining successively accumulative superposition, during superposition, remove the 1st Outside individual modulation symbol, remaining m-1 modulation symbol first carries out mirror image optimization before superposition, comprising:

3. sending method according to claim 1, it is characterised in that

Remaining m-1 modulation symbol described first carries out mirror image optimization before superposition, comprising:

4. sending method according to claim 3, it is characterised in that

The constellation point that the constellation point that described k-th modulation symbol is formed is formed according to front superposition symbol is carried out Mirror image operation, comprising:

5. sending method according to claim 4, it is characterised in that

The constellation point that described dummy constellation coordinate is formed by described front superposition symbol obtains, described dummy constellation The corresponding a kind of mirror image operation mode in each constellation district in coordinate, refers to:

6. sending method according to claim 1, it is characterised in that

Described m information to be sent is modulated respectively, comprising:

7. the sending method according to any claim in claim 1-6, it is characterised in that

Described m information to be sent m user equipment of correspondence, wherein corresponding of each information to be sent User equipment, described m user equipment is belonging respectively to different classes of, described classification according to user equipment with The distance of consolidated network side apparatus divides；

8. a descending multi-user message receiving method, it is characterised in that include:

9. method of reseptance according to claim 8, it is characterised in that

When demodulating the 1st modulation symbol, the symbol that signal carries is launched in described direct demodulation, comprising:

10. method of reseptance according to claim 8 or claim 9, it is characterised in that

When demodulating remaining m-1 modulation symbol, the symbolic solution that described elder generation carries from transmitting signal recalls part Symbol, after launching and removing described partial symbols the symbol that carries of signal, re-demodulation once obtains treating excellent Change symbol, comprising:

11. method of reseptances according to claim 10, it is characterised in that

Described anti-mirror image carried out to described symbol to be optimized obtain raw modulation symbols, comprising:

12. method of reseptances according to claim 11, it is characterised in that

13. method of reseptances according to claim 10, it is characterised in that

Described demodulating information includes described 1st modulation symbol and front k-1 in described m-1 modulation symbol The modulation system of individual modulation symbol and power allocation factor.

14. method of reseptances according to claim 8, it is characterised in that

Described m modulation symbol corresponding m user equipment, wherein corresponding of each modulation symbol respectively User equipment, described m user equipment is belonging respectively to different classes of, described classification according to user equipment with The distance of consolidated network side apparatus divides；

15. 1 kinds of descending multi-user information transmitting apparatus, it is characterised in that include modulation module, optimization Laminating module, transmitter module, wherein:

16. dispensing devices according to claim 15, it is characterised in that

Described m the modulation symbol obtaining is added up superposition, the mistake of superposition by described optimization stack module successively Cheng Zhong, in addition to the 1st modulation symbol, remaining m-1 modulation symbol first carries out mirror image optimization before superposition, Including:

Described optimization stack module carries out mirror image optimization to the 2nd modulation symbol, by the 1st modulation symbol Superpose with the 2nd modulation symbol after mirror image optimization and obtain symbol s1, mirror is carried out to the 3rd modulation symbol As optimizing, described symbol s1 is superposed with the 3rd modulation symbol after mirror image optimization and obtains s2, with this type of Push away, until all m modulation symbol all superpositions are complete.

17. dispensing devices according to claim 15, it is characterised in that

Remaining m-1 modulation symbol described is first carried out mirror image optimization before superposition by described optimization stack module, Including:

For k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, described optimization is folded The constellation point adding module by described k-th modulation symbol formation clicks through according to the constellation that front superposition symbol is formed Row mirror image operation, described front superposition symbol is described 1st modulation symbol and described m-1 modulation symbol In front k-1 modulation symbol add up the symbol that obtains after superposition successively.

18. dispensing devices according to claim 17, it is characterised in that

The constellation point that described k-th modulation symbol is formed by described optimization stack module is according to front superposition symbol The constellation point being formed carries out mirror image operation, comprising:

The constellation point that described optimization stack module is formed according to described front superposition symbol is in dummy constellation coordinate Position determine mirror image operation mode to described k-th modulation symbol, with determined by mirror image operation side The constellation point that described k-th modulation symbol is formed by formula carries out mirror image operation；Described dummy constellation coordinate by The constellation point that described front superposition symbol is formed obtains, and each the constellation district in described dummy constellation coordinate is corresponding A kind of mirror image operation mode.

19. dispensing devices according to claim 18, it is characterised in that

Described dummy constellation coordinate overlaps with the described front coordinate superposing the planisphere that symbol is formed, described void Intending comprising in constellation an equal-sized constellation district, the constellation point that described front superposition symbol is formed is empty again Intend the central point that the position in constellation is one of them constellation district, each constellation district non-overlapping copies；

20. dispensing devices according to claim 15, it is characterised in that

M information to be sent is modulated by described modulation module respectively, comprising:

The modulation system that m information to be sent is modulated by described modulation module is identical or different, described 1st information to be sent is used one of following modulation system to be modulated obtaining the described 1st by modulation module Individual modulation symbol: BPSK, QPSK, QAM, other information to be sent are adjusted by described modulation module The modulation system of system includes one below: QPSK, QAM.

21. dispensing devices according to any claim in claim 15-20, it is characterised in that

When accumulative superposition, described optimization stack module by described m the modulation symbol obtaining according to described The order that the corresponding user equipment of modulation symbol and described network equipment distance draw near adds up folded successively Add；

22. 1 kinds of descending multi-user information receivers, it is characterised in that include: receiver module, the One demodulation module, the second demodulation module, wherein:

23. reception devices according to claim 22, it is characterised in that

Described first demodulation module directly demodulates launches the symbol that signal carries, comprising:

The interference demodulation described transmitting signal of described first demodulation module other m-1 modulation symbol of band carries Symbol, directly obtain described 1st modulation symbol.

The 24. reception devices according to claim 22 or 23, it is characterised in that

The symbolic solution that described second demodulation module first carries from transmitting signal recalls partial symbols, believes from launching After removing described partial symbols in number symbol carrying, re-demodulation once obtains symbol to be optimized, comprising:

For k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, described second solves Mode transfer block is according to demodulating information, with the interference demodulation institute of k-th modulation symbol to m-1 modulation symbol Stating and launching the symbol that signal carries, obtain front superposition symbol, described front superposition symbol is described 1st tune Symbol processed adds up the symbol after superposing successively with front k-1 modulation symbol in described m-1 modulation symbol, Remove described front superposition symbol from the symbol that described transmitting signal carries, to the symbol obtaining after removing again Once demodulate, obtain the symbol to be optimized of k-th symbol.

25. reception devices according to claim 24, it is characterised in that

Described second demodulation module carries out anti-mirror image to described symbol to be optimized and obtains raw modulation symbols, bag Include:

For k-th modulation symbol in remaining m-1 modulation symbol, k=1 ... m-1, described second solves Constellation zone position in dummy constellation coordinate for the constellation point that mode transfer block is formed according to described front superposition symbol is true The fixed mirror image operation mode to described k-th modulation symbol, according to determined by mirror image operation mode to institute The constellation point stating k-th modulation symbol formation carries out anti-mirror image operation；Described dummy constellation coordinate is by described The constellation point that front superposition symbol is formed obtains, and each the constellation district in described dummy constellation coordinate is corresponding a kind of Mirror image operation mode.

26. reception devices according to claim 25, it is characterised in that

27. reception devices according to claim 25, it is characterised in that

28. reception devices according to claim 22, it is characterised in that