CN103067138B - Method of establishing communication and method and device of signal transmission based on network code table - Google Patents

Method of establishing communication and method and device of signal transmission based on network code table Download PDF

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CN103067138B
CN103067138B CN201310021828.0A CN201310021828A CN103067138B CN 103067138 B CN103067138 B CN 103067138B CN 201310021828 A CN201310021828 A CN 201310021828A CN 103067138 B CN103067138 B CN 103067138B
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code word
signal code
channel
signal
user
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CN103067138A (en
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马卫国
程龙龙
林琳
孙岳
顾嘉辉
李颖
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority to PCT/CN2014/070880 priority patent/WO2014111050A1/en
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    • 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
    • H04L1/0076—Distributed coding, e.g. network coding, involving channel coding

Abstract

The invention provides a method of establishing communication and a method and a device of signal transmission based on a network code table. After a trunk device receives signal codons, the trunk device confirms the mapping relation between coded symbols and the codon group formed by a first signal codon sent by a first user and a second signal codon sent by a second user according to an acquired channel condition, confirms the corresponding coded symbols of the received signal codons according to the mapping relation, sends the coded symbols and the attribute information of the mapping relation to users, and achieves information interaction. Due to the fact that the mapping relation is confirmed according to the channel condition, the influence of channel disturbance to signal transmission is reduced, and the robustness of the signal transmission is improved.

Description

Coding schedule Network Based sets up the method for communication, method for transmitting signals and device
Technical field
The present invention relates to the network communications technology, particularly relate to a kind of coding schedule Network Based and set up the method for communication, method for transmitting signals and device.
Background technology
The mode of traditional communication network transmission signal is storage forwarding, does not do any process to signal content, and trunking plays the role of transponder.And network coding technique breaches the processing mode that the trunkings such as router in legacy network are only responsible for forwarding signal storage, realize transmitting again after trunking can carry out coded treatment to received signal, improve the throughput of network.In the technology of communication network transmission signal, wireless both-way trunk channel (Two-Way channel) realizes the mutual transmission of the signal of two users by trunking cooperation.Two-Way channel is in order to reach maximum system capacity, and whole signal reciprocal process divides two time slots to complete, and is specially up multimedia access control (Medium Access Control, MAC) stage and downlink broadcast (Broadcast, BC) stage.As shown in Figure 1, first trunking place receives the signal of two users, send to two users again after it is carried out network code by sign map, each user determines the signal of another user according to the information received and its own signal, thus completes exchanges data.At present, the relaying of Two-Way channel carries out the network code mode that the more common mode of network code has the analog network coding based on amplification forwarding agreement, bit exclusive-OR network coding, denoising transmission network coding etc. and the various encryption algorithm based on decoding forwarding combines.
Wherein, amplification forwarding network code utilizes amplification forward collaboration, after namely via node carries out simple amplification process to the mixed signal received, is transmitted to two information source node.This coded system needs information source node to understand channel signal, and has the negative effect of noise amplification and noise storage.
Bit exclusive-OR network coding is based on the decoding retransmission protocol in one-way junction collaboration communication, but simultaneously via node carries out coded modulation processing forward to information source node to receiving after two signals carry out bit XOR.This coded system is easily subject to the impact of noise and channel disturbance in transmitting procedure, and its robustness is poor.
Denoising transmission network coding is that via node designs a kind of denoising mapped function relation, the mixed signal received by via node carries out certain relation obtaining two signals after certain maps, then information source node is transmitted to, information source node can utilize its own signal and after receiving mixed signal, utilize inverse mapping relation to obtain required signal.This coded system can not reduce the interference that channel status causes Symbol recognition.
The present inventor finds, the network coding technique used in current signals transmission can not reduce the impact of channel status on Signal transmissions, causes the robustness of Signal transmissions poor.
Summary of the invention
Embodiments provide a kind of coding schedule Network Based and set up the method for communication, method for transmitting signals and device, to reduce the impact of channel status on Signal transmissions.
Coding schedule Network Based sets up a method for communication, comprising:
Receive the signal code word from first user and the second user, obtain the channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt;
According to the channel status of described first channel and the channel status of described second channel, determine the mapping relations between Codeword Sets and coded identification, described Codeword Sets is made up of the first signal code word, secondary signal code word, described first signal code word is the signal code word that first user can send, described secondary signal code word is the signal code word that the second user can send, and the first signal code word of the Codeword Sets that each coded identification is corresponding, secondary signal code word meet singularity;
The network code table of the mapping relations characterized between described Codeword Sets and coded identification is sent to described first user and described second user.
A kind of method for transmitting signals, comprising:
Receive the signal code word from first user and the second user, obtain the channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt;
According to the channel status of the first channel and the channel status of second channel, determine the mapping relations between Codeword Sets and coded identification, Codeword Sets is made up of the first signal code word, secondary signal code word, first signal code word is the signal code word that first user can send, secondary signal code word is the signal code word that the second user can send, and the first signal code word of the Codeword Sets that each coded identification is corresponding, secondary signal code word meet singularity;
Determine the coded identification that the Codeword Sets belonging to signal code word of reception is corresponding according to mapping relations, and the attribute information of this coded identification and mapping relations is sent to first user and the second user.
A kind of signal transmitting apparatus, comprising:
Receiving element, for receiving the signal code word from first user and the second user;
Acquiring unit, the channel status of the second channel that channel status and described second user for obtaining the first channel that described first user adopts adopt;
Determining unit, for according to the channel status of the first channel and the channel status of second channel, determine the mapping relations between Codeword Sets and coded identification, Codeword Sets is made up of the first signal code word, secondary signal code word, first signal code word is the signal code word that first user can send, secondary signal code word is the signal code word that the second user can send, and the first signal code word of the Codeword Sets that each coded identification is corresponding, secondary signal code word meet singularity;
Transmitting element, for determining coded identification corresponding to Codeword Sets belonging to the signal code word that receives according to mapping relations, and sends to first user and the second user by the attribute information of this coded identification and mapping relations.
Embodiments provide a kind of method that coding schedule Network Based sets up communication, method for transmitting signals and device, after trunking receives signal code word, according to the first signal code word that the channel status determination coded identification obtained and first user send, mapping relations between the Codeword Sets that the secondary signal code word that second user sends is formed, the coded identification that the signal code word of reception is corresponding is determined again according to mapping relations, and coded identification and mapping relations attribute information are sent to user, realize information interaction, because mapping relations are determined according to channel status, reduce the impact of channel disturbance on Signal transmissions, improve the robustness of Signal transmissions.
Accompanying drawing explanation
The flow chart that a kind of wireless both-way trunk channel data that Fig. 1 provides for prior art is mutual;
Fig. 2 sets up the method flow diagram of communication for coding schedule a kind of Network Based that the embodiment of the present invention provides;
A kind of method for transmitting signals flow chart that Fig. 3 provides for the embodiment of the present invention;
The one preferably method for transmitting signals flow chart that Fig. 4 provides for the embodiment of the present invention;
A kind of method flow diagram determining the mapping relations of Codeword Sets and coded identification that Fig. 5 provides for the embodiment of the present invention;
A kind of method flow diagram preferably determining the mapping relations of Codeword Sets and coded identification that Fig. 6 provides for the embodiment of the present invention;
24 heterogeneous network coding schedules of the QPSK that Fig. 7 provides for the embodiment of the present invention;
The one preferably QPSK method for transmitting signals flow chart that Fig. 8 provides for the embodiment of the present invention;
One of relaying planisphere under the Two-Way channel fading signal QPSK that Fig. 9 provides for the embodiment of the present invention;
Relaying planisphere two under the Two-Way channel fading signal QPSK that Figure 10 provides for the embodiment of the present invention;
The QPSK that Figure 11 provides for the embodiment of the present invention adopt single map and bunch between minimum range and mapping performance comparison diagram;
A kind of signal transmitting apparatus structural representation that Figure 12 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of coding schedule Network Based and set up the method for communication, method for transmitting signals and device, the present embodiment specifically can be applied distant between two users, two users cannot direct communication, needs trunking to forward in the scene of signal code word of the other side respectively to two users.In embodiments of the present invention, trunking receives the signal code word from first user and the second user, trunking obtains the channel status of the first channel that first user signal transmission code word adopts, obtain the channel status of the second channel that second user's signal transmission code word adopts, in an initial condition, the first signal code word that trunking sends according to channel status determination coded identification and first user, mapping relations between the Codeword Sets that the secondary signal code word that second user sends is formed, namely the network code table of the mapping relations characterized between Codeword Sets and coded identification is determined, network code table is sent to first user and the second user by trunking, thus the communication process set up between trunking and user, in actual signal transmitting procedure, the coded identification that the signal code word of reception is corresponding is determined again according to mapping relations, and coded identification and mapping relations attribute information are sent to user, realize information interaction, because mapping relations are determined according to channel status, reduce the impact of channel disturbance on Signal transmissions, improve the robustness of Signal transmissions.
Realize in the process of mutual transmission of the signal of two users at wireless both-way trunk channel (Two-Way channel) by trunking cooperation, it is the first channel that first user is used for the channel of signal transmission, it is second channel that second user is used for the channel of signal transmission, the signal that first user can send is the first signal code word, the signal that second user can send is secondary signal code word, first signal code word and secondary signal code word form Codeword Sets, the signal that trunking receives is by the signal code word received by the first channel and consist of the signal code word that second channel receives, mapping relations between trunking determination Codeword Sets and coded identification, and determine according to mapping relations the coded identification that the signal code word that receives is corresponding, and coded identification and mapping relations are sent to two users, two users determine the signal code word of another user according to coded identification and mapping relations, realize signal mutual.
As shown in Figure 2, the embodiment of the present invention provides a kind of coding schedule Network Based to set up the method for communication, comprising:
S201, receive signal code word from first user and the second user, obtain the channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt.
Set up the initial condition of communication at trunking and user under, trunking receives the signal code word from first user and the second user, trunking obtains the channel status of the first channel and the channel status of second channel, the channel that first channel adopts for first user signal transmission code word, the channel that second channel adopts for second user's signal transmission code word.Trunking can pass through to first user and second user's transmitting channel detectable signal, and the result of detection according to first user and the second user feedback obtains the channel status of the first channel and the channel status of second channel.
S202, according to the channel status of the first channel and the channel status of second channel, determine the mapping relations between Codeword Sets and coded identification, Codeword Sets is made up of the first signal code word, secondary signal code word, and the first signal code word of the Codeword Sets that each coded identification is corresponding, secondary signal code word meet singularity.
After the channel status getting the first channel and second channel, mapping relations between the channel status determination Codeword Sets arrived according to Real-time Obtaining and coded identification, namely a network code table is formed, this network code table is for characterizing the mapping relations between Codeword Sets and coded identification, make the first signal code word in all Codeword Sets corresponding to each coded identification in mapping relations and secondary signal code word meet singularity, ensure that the signal code word that user can send according to the coded identification received and this user determines the signal code word that another user sends.Wherein, Codeword Sets is specially the combination that the first signal code word and secondary signal code word are formed, and the first signal code word is specially the signal code word that first user can send, and secondary signal code word is specially the signal code word that the second user can send.The first signal code word in each Codeword Sets that in the network code table formed, each coded identification is corresponding, secondary signal code word meet singularity, be specially and meet characteristic that is different and that travel through one by one, namely ensure that the first signal code word in all Codeword Sets that each coded identification is corresponding is different, and comprise all first signal code words; Secondary signal code word in all Codeword Sets that each coded identification is corresponding is different, and comprises all secondary signal code words.
S203, the network code table of the mapping relations characterized between described Codeword Sets and coded identification is sent to described first user and described second user.
Formed after characterizing the network code table of the mapping relations between Codeword Sets and coded identification under the initial condition that trunking is set up in communication, this network code table is sent to first user and the second user, thus sets up first user, communication process between the second user and trunking.Follow-up first user or the second user can directly utilize the network code table received to decode signal code word that the second user or first user send, thus realize the communication between first user and the second user.
The present embodiment is by obtaining the channel status of channel, under the initial condition that user and trunking communication set up, the channel status of each channel is considered when determining network code table, namely the impact of channel status on Signal transmissions has been fully taken into account in an encoding process, for network code brings more gain.
As shown in Figure 3, the embodiment of the present invention provides a kind of method for transmitting signals, comprising:
S301, receive signal code word from first user and the second user, obtain the channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt.
Set up communication process between user and trunking after, first user and the second user send respective signal code word respectively to trunking, first user can adopt the first channel to send signal code word to trunking, and the second user can adopt second channel to send signal code word to trunking.Trunking can obtain the channel status of the first channel and the channel status of second channel while Received signal strength code word, also can obtain the channel status of the first channel and the channel status of second channel according to the cycle of presetting.
S302, according to the channel status of the first channel and the channel status of second channel, determine the mapping relations between Codeword Sets and coded identification, Codeword Sets is made up of the first signal code word, secondary signal code word, and the first signal code word of the Codeword Sets that each coded identification is corresponding, secondary signal code word meet singularity.
This step is the channel status generating network coding schedule of channel status according to the first channel and second channel, namely the mapping relations between Codeword Sets and coded identification are determined, make the first signal code word in all Codeword Sets corresponding to each coded identification in mapping relations and secondary signal code word meet singularity, ensure that the signal code word that user can send according to the coded identification received and this user determines the signal code word that another user sends.Wherein, Codeword Sets is specially: the combination that the first signal code word and secondary signal code word are formed, the first signal code word is specially: the signal code word that first user can send, and secondary signal code word has for the signal code word that the second user can send.First signal code word of the Codeword Sets that in network code table, each coded identification is corresponding, secondary signal code word meet singularity, singularity is specially: the different and characteristic traveled through one by one, it is different that first signal code word of the Codeword Sets that coded identification is corresponding, secondary signal code word meet the first signal code word that singularity is in all Codeword Sets ensureing that each coded identification is corresponding, and comprise all first signal code words; Secondary signal code word in all Codeword Sets that each coded identification is corresponding is different, and comprises all secondary signal code words.
S303, determine coded identification corresponding to Codeword Sets belonging to signal code word that receive according to mapping relations, and the attribute information of this coded identification and mapping relations is sent to first user and the second user.
Concrete, first the Codeword Sets belonging to signal code word received is determined, due to receive signal code word by by first channel receive signal code word and formed by the signal code word that second channel receives, and be the signal code word of signal code word by obtaining after the first channel that first user sends by the signal code word that the first channel receives, can according to the signal code word sent by the signal code word of the first channel reception and the channel status determination first user of the first channel, in like manner, also the signal code word that the second user sends can be determined, the signal code word that the first user determined sends is a first signal code word, the signal code word that the second user determined sends is a secondary signal code word, determine the two Codeword Sets formed, and determine the coded identification that this Codeword Sets is corresponding in mapping relations, and the attribute information of this coded identification and mapping relations is sent to first user and the second user, first user and the second user can determine according to coded identification and mapping relations the Codeword Sets that this coded identification is corresponding, due to the first signal code word of Codeword Sets corresponding to coded identification, secondary signal code word meets singularity, user can find a unique possible Codeword Sets according to the signal code word oneself sent in the Codeword Sets that this coded identification is corresponding, thus the signal code word that another user sends can be determined, realize signal mutual.
The present embodiment is according to channel status determination mapping relations, the coded identification that the signal code word of reception is corresponding is determined again according to mapping relations, namely take into account the impact of channel status on Signal transmissions in an encoding process, and then reduce the impact of channel status, improve the robustness of Signal transmissions.
Actual carry out Signal transmissions time, if there is larger noise in channel, after Signal transmissions, the signal code word that receives to be determined by maximum likelihood algorithm, easily the signal code word received is mistaken for the several signal code words nearest with its Euclidean distance, produce blurring, in order to noise decrease is on the impact of Signal transmissions, one group of signal code word that Euclidean distance can be made nearest is a corresponding coded identification in mapping relations, even if then signal code word is obscured, result after coding is still constant, and the signal being broadcast to user is also constant.For signal code word be the signal code word received by the first channel and the signal code word received by second channel and form, preferably, according to the channel status of the first channel and the channel status of second channel, determine the mapping relations between Codeword Sets and coded identification, specifically comprise:
According to the channel status H of the first channel 1and the channel status H of second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, the first signal code word S that the signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmeet singularity, signal code word S meets S=H 1s a+ H 2s b, the first signal code word S afor the signal code word that first user can send, secondary signal code word S bbe the signal code word that the second user can send, and the Euclidean distance existed in a signal code word combination between each signal code word S and be all equal numbers and the first signal code word S of correspondence a, secondary signal code word S beuclidean distance between the signal code word S meeting singularity and minimum value.
Signal code word S is specially: the signal code word received, this sentence the signal code word received be by the first channel the signal code word received and the signal code word received by second channel and be example, can according to S=H 1s a+ H 2s bdetermine the signal code word S that the first signal code word in a Codeword Sets, secondary signal code word are corresponding, wherein S abe the first signal code word, S bfor secondary signal code word.
Signal code word combination is specially: the combination of signal code word S, the number of the signal code word S wherein comprised and S aor S btotal number identical, S in the embodiment of the present invention awith S btotal number identical, the corresponding coded identification of each signal code word combination.
The first signal code word that signal code word S in signal code word combination is corresponding, secondary signal code word meet singularity, be specially: the first signal code word that the signal code word S in this signal code word combination is corresponding is different, and comprise all first signal code words, the secondary signal code word that signal code word S in this signal code word combination is corresponding is different, and comprising all secondary signal code words, the first signal code word that wherein signal code word S is corresponding and secondary signal code word can according to S=H 1s a+ H 2s bdetermine.
When determining mapping relations, first determine all first signal code word S that first user can send a, and all secondary signal code word S that the second user can send b, thus draw the first signal code word S awith secondary signal code word S ball Codeword Sets that can form; By the first signal code word S in each Codeword Sets awith secondary signal code word S bsubstitute into S=H 1s a+ H 2s b, obtain the signal code word S that this Codeword Sets is corresponding, determine number and the first signal code word S aor the first signal code word S bidentical, corresponding the first signal code word S of total number aall not identical and Euclidean distance and minimum one group of signal code word S, form a signal code word combination, by corresponding for this signal code word combination coded identification, the all corresponding coded identification of all signal code word S then in this signal code word combination, the Codeword Sets also corresponding coded identification that all signal code word S are corresponding; Determine the mapping relations of other signal code word combination and coded identification again according to any coded system, just obtain the first signal code word S awith secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification.
Concrete, realized the process of the mutual transmission of the signal of two users by trunking cooperation for Two-Way channel, as shown in Figure 4, the method for transmitting signals that the embodiment of the present invention provides specifically comprises:
S401, trunking determine the signal code word received be by the first channel the signal code word received and the signal code word received by second channel and, trunking obtains the channel status of the first channel and the channel status of second channel;
S402, trunking are according to the channel status H of the first channel 1and the channel status H of second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, the first signal code word S that the signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmeet singularity, signal code word S meets S=H 1s a+ H 2s b, the first signal code word S afor the signal code word that first user can send, secondary signal code word S bbe the signal code word that the second user can send, and the Euclidean distance existed in a signal code word combination between each signal code word S and be all equal numbers and the first signal code word S of correspondence a, secondary signal code word S beuclidean distance between the signal code word S meeting singularity and minimum value;
The coded identification that the signal code word combination at the signal code word place received is corresponding determined by S403, trunking according to mapping relations, and the attribute information of this coded identification and mapping relations is sent to first user and the second user.
Concrete, the signal code word of reception as a signal code word S, is determined the signal code word combination belonging to this signal code word S, and is determined the coded identification that this signal code word combination is corresponding by trunking, and by this coded identification and the first signal code word S awith secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification send to first user and the second user, first user and the second user using the signal code word that oneself sends as S aor S b, according to coded identification, the first signal code word S awith secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification determine the S that another user sends bor S a, thus it is mutual to realize signal.
The one group of signal code word S making Euclidean distance nearest belongs to a signal code word combination in mapping relations, a corresponding coded identification, even if then signal code word is obscured, the result after coding is still constant, the signal being broadcast to user is also constant, due to the S that the signal code word S in signal code word combination is corresponding a, S bmeet singularity, user still according to the signal of correct another user of determination of the signal of oneself, thus can reduce the impact of noise on Signal transmissions.
Except the signal code word combination that the signal code word S easily obscured except this group forms, other signal code word combination can be determined in several ways, such as, in all signal code word S, remove the signal code word S that this group is easily obscured, and in the signal code word S of remainder, determine quantity and the first signal code word S of signal code word S aidentical, the corresponding first signal code word S of quantity a, secondary signal code word S bmeet singularity and Euclidean distance and minimum one group of signal code word S, form new signal code word combination, signal code word S in the signal code word combination that further removal is new, determine a new signal code word combination in the same way again, until all signal code word S have corresponding signal code word combination; Or
The method of the determination mapping relations in the network coding method that linear network encoding, random network code etc. can be adopted conventional determines the first signal code word S that the signal code word S in other signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, from S402, S awith S bquantity identical, and the number of signal code word S in each group signal code word combination is all and S aquantity identical, certainly, those skilled in the art can adopt other feasible patterns to determine the mapping relations of other signal code word combination, herein no longer one by one describe.
Because these mapping relations are according to S=H 1s a+ H 2s bdetermine, and H 1be specially the channel status of the first channel, H 2be specially the channel status of second channel, therefore also can reduce the impact of channel disturbance on Signal transmissions carrying out encoding according to this mapping relations.The robustness of Signal transmissions can be improved.
The glossary of symbols that relaying place sends when broadcasting needs to meet singularity, and a user just can be made by the coded identification that relaying sends to be distinguished the signal of another user.Namely the coded identification collection supposing network code is M, and in order to user A (B) can translate the signal code word of user B (A), network code will meet:
M(x A,x B)≠M(x' A,x B), ∀ x A ≠ x ′ A ∈ S n A , x B ∈ S n B
M(x A,x B)≠M(x A,x' B), ∀ x B ≠ x ′ B ∈ S n B , x A ∈ S n A
Wherein M (x a, x b) be specially x a, x bcorresponding symbol, M (x' a, x b) be specially x' a, x bcorresponding symbol, M (x a, x' b) be specially x a, x' bcorresponding symbol.Wherein be the first signal code word S athe set of all probable values, x a, x' afor set in two different elements, represent the first signal code word S atwo different probable values, for secondary signal code word S bthe set of all probable values, x b, x' bfor in two different elements, represent secondary signal code word S btwo different probable values, concrete, as the first signal code word S athe set of all probable values for { 0,1,2,3}, x a, x' acan be { any two different values in 0,1,2,3}, such as x awhen being 0, x' acan be that { arbitrary value in 1,2,3}, can by x abe taken as 0, x' abe taken as 2; As secondary signal code word S bthe set of all probable values for { 0,1,2,3}, x b, x ' bcan be { any two different values in 0,1,2,3}, such as x bwhen being 0, x ' bcan be that { arbitrary value in 1,2,3}, can by x bwhen being taken as 0, x ' bbe taken as 2.
Preferably, can by determining the signal codeword set of signal code word S and determining mapping relations to the form that it carries out sub-clustering, wherein, signal codeword set is specially the first signal code word S a, secondary signal code word S bs=H is substituted into by combination in any relation 1s a+ H 2s bafter the set that forms of all signal code word S that can obtain, concrete, as shown in Figure 5, in S402, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, specifically comprise:
S501, channel status H according to described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, respectively by S in signal codeword set aor S bidentical signal code word S is defined as cluster;
In practical application, first determine all first signal code word S awith secondary signal code word S bthe Codeword Sets formed, by the first signal code word S in each Codeword Sets awith secondary signal code word S bsubstitute into S=H 1s a+ H 2s bthe signal code word S obtained, all signal code word S form a signal codeword set, and be this set sub-clustering, the rule of sub-clustering is: by S aidentical signal code word S is defined as cluster, or by S bidentical signal code word S is defined as cluster.
S502, Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
Wherein, between bunch Euclidean distance and be specially: in each bunch, respectively get a signal code word S form one group, calculate this group signal code word S Euclidean distance between any two and, between being bunch Euclidean distance and.
In each bunch, respectively get a signal code word S form one group, determine this group signal code word S Euclidean distance between any two and, what determine Euclidean distance is a signal code word combination with minimum one group of signal code word S, by the corresponding coded identification of this group signal code word S, thus make the first signal code word S that this group signal code word S is corresponding a, secondary signal code word S bthe corresponding coded identification of the Codeword Sets formed.
S503, from signal codeword set, remove each signal code word that signal code word combination comprises, form new signal codeword set, utilize new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
Usually, first by determine in S502 bunch between Euclidean distance and minimum one group of signal code word S remove from signal codeword set, re-use arbitrarily encoding method and determine other signal code word combination, and determine the mapping relations of other signal code word combination and coded identification, thus obtain the first signal code word S corresponding to other signals code word S a, secondary signal code word S bthe Codeword Sets formed and the corresponding relation of coded identification, until all signal code word S have the coded identification of its correspondence in signal codeword set.
Certainly, those skilled in the art can adopt other feasible patterns to determine this mapping relations, describes no longer one by one herein.
During by determining the signal codeword set of signal code word S and determining mapping relations to its form of carrying out sub-clustering, further, as shown in Figure 6, new signal codeword set is utilized to determine the first signal code word S that signal code word S in other signal code word combination is corresponding in S503 a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, specifically comprises:
S601, Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
First determine except determine in S502 bunch between the signal codeword set that forms of signal code word S except Euclidean distance and minimum one group of signal code word S, in each bunch of this signal codeword set, respectively get a signal code word S form one group, calculate this group signal code word S Euclidean distance between any two and, select Euclidean distance and minimum one group of signal code word S, by corresponding for this group signal code word S coded identification, thus make the first signal code word S that this group signal code word S is corresponding a, secondary signal code word S bthe corresponding coded identification of the Codeword Sets formed.
S602, from signal codeword set, remove each signal code word that this signal code word combination comprises, form new signal codeword set, repeat above-mentioned steps, determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
Concrete, first by determine in S601 bunch between Euclidean distance and minimum one group of signal code word remove from signal codeword set, re-use the method for Euclidean distance and minimum signal code word combination between determining bunch, determine new signal code word combination, and determine the mapping relations of this signal code word combination and coded identification, thus obtain the first signal code word S corresponding to this group signal code word S a, secondary signal code word S bthe Codeword Sets formed and the corresponding relation of coded identification, remove the signal code word S that Euclidean distance and minimum one group of signal code word combination between this group bunch are corresponding again, Euclidean distance and minimum signal code word combination between new bunch is determined, until all signal code word S have the coded identification of its correspondence in signal codeword set in the signal codeword set that the signal code word S of remainder forms.
Certainly, those skilled in the art can adopt other modes to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and other coded identifications, describe herein no longer one by one.
In practical application, can be realized S in signal codeword set by planisphere aor S bidentical signal code word S is defined as cluster, concrete, by S in signal codeword set in S501 aor S bidentical signal code word S is defined as cluster, specifically comprises:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the planisphere of signal codeword set, according to planisphere by S avalue or S bthe signal code word S that value is identical is defined as cluster;
Form a signal code word combination then by Euclidean distance between making bunch in S502 with the signal code word S in minimum each bunch, specifically comprise:
According to planisphere plan range between making bunch formed a signal code word combination with the signal code word S in minimum each bunch.
For four offset keying (QPSK) signals, according to S=H 1s a+ H 2s bdetermine the planisphere of S, then S a, S b={ 0,1,2,3}, in planisphere, 16 constellation point are according to S astate difference is divided into 4 bunches; When carrying out most tuftlet spacing and calculating, can most tuftlet spacing be defined as calculate, determine bunch spacing and the combination of minimum constellation point.
Between can being determined very intuitively bunch by planisphere, the signal code word combination formed with the signal code word S in minimum each bunch of Euclidean distance, reduces the complexity calculated.
Certainly, those skilled in the art can adopt between other feasible pattern determination elements Euclidean distance with minimum signal code word combination, describes no longer one by one herein.
Because the mapping relations of signal code word and symbol are according to S=H 1s a+ H 2s bset, in practical application, in order at utmost reduce the impact of channel on Signal transmissions, can when trunking receive the first signal code word and secondary signal code word, trunking obtains the channel status of the first channel and second channel; Or trunking, according to the channel status of the first channel obtained when reaching setting cycle and second channel, determines current channel condition.
Concrete, if trunking obtains channel status according to setting cycle, if in same period, trunking repeatedly receives the information that two users send, the state of channel when then can determine at every turn to receive according to the Changing Pattern of the channel status obtained before and channel status the information that user sends, or, when channel status is stablized or cycle of setting is shorter, the state of channel when the channel status obtained before is received the information of user's transmission as this, further, also can using the mean value of the channel status obtained several times before as receive at every turn user send information time channel state.
Certainly, those skilled in the art also can adopt other feasible patterns to obtain channel status, describes no longer one by one herein.
Preferably, the mapping relations in the embodiment of the present invention can be embodied by the form of network code table.
Embody mapping relations with network code table, concrete, the element of the first row in network code table can be set to the signal code word that first user can send, the element of first row is set to the signal code word that the second user can send.The coded identification that other elements are then the first row element corresponding to this position, first row element is corresponding.
When using network code table to embody mapping relations, due to the first signal code word S that the signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmeet singularity, therefore same a line of dual user network code table or same row can not have identical state to occur.
Concrete, for the network code of two sign map, when user adopts two-phase offset keying (BPSK) to modulate, every road signal code word two kinds of signal code word tables show: s={ ± 1}, suppose channel status H 1=H 2=1, it is 0 that relaying place receives signal code word.
Consider from the Received signal strength code word of trunking, suppose S 1for trunking receives the signal code word of first user transmission, S 2for trunking receives the signal code word of second user's transmission, then { s 1, s 2}={ 1 ,-1} and { s 1, s 2}={-1,1} is the most probable transmission signal of user, is mapped as a coded identification, utilizes network code to broadcast, and each user can be allowed to go to distinguish another subscriber signal according to the signal of this user.In fact, for two-way BPSK symbol, the make meeting singularity also only has one, as shown in table 1:
Table 1 BPSK network code
After user receives broadcast singal, just can recover the signal of another user according to coding schedule.Owing to state in table 10,1 to be exchanged the coding schedule formed, still represent same coded system with table 1, state 0,1 can be exchanged the homogeneous network coding schedule that the coding schedule formed is called table 1.
For the network code of four sign map, for two-way QPSK signal configuration network code.The network code totally 576 kinds that the QPSK of two users can form, by known above, by 0 in code table, 1,2,3 states exchange mutually does not affect network code result, code table before and after exchanging is called isomorphism state by us, then each code table with comprise from structure (P such as interior 24 code tables 4 4).Therefore actual isomery code table is 576/24=24 kind altogether.Here all heterogeneous networks coding code table is listed:
According to the position that first signal code word 0 is often being gone, they are divided into 6 groups.Be convenient to add up all isomery situations.With { a1, a2, a3, a4} represent the position of 0 appearance, and { a1, a2, a3, a4} to represent that in the first row 0 appears at a1 row, 0 appear at a2 row in a second row, and in the third line, 0 appears at a3 row, and in four lines, 0 appears at a4 row.
Concrete, as shown in Figure 7, table 1 in Fig. 7, table 2, table 3, in table 4,0 there is position { 1, 2, 3, 4}, table 5, table 6, table 7, in table 8,0 position occurred is { 1, 2, 4, 3}, table 9, table 10, table 11, the position that table 12 corresponding 0 occurs is { 1, 3, 2, 4}, table 13, table 1, table 15, the position that table 16 corresponding 0 occurs is { 1, 3, 4, 2}, table 17, table 18, table 19, the position that table 20 corresponding 0 occurs is { 1, 4, 2, 3}, table 21, table 22, table 23, the position that table 24 corresponding 0 occurs is { 1, 4, 3, 2}, the each network code table the first row signal code word listed in Fig. 7 is: 0-1-2-3, can be standard network coding schedule by this network code table definition, other homogeneous network coding can pass through exchange 0, 1, 2, 3 these states obtain.
By the embodiment mapping relations that the form of network code table can be cheer and bright, preferably, for the network code that QPSK maps, can in advance for 24 heterogeneous network coding schedules of QPSK arrange numbering, then signal code word can be the numbering that this network code table is corresponding with the attribute information of the mapping relations of symbol.According to numbering, user just can determine which coding schedule trunking place coding uses, thus can determine the signal code word of another user according to network code table and the signal code word of self, realizes the exchange of data.
Certainly, those skilled in the art also can adopt other feasible patterns to set the attribute information being transferred to the signal code word of user and the mapping relations of symbol, user can the mapping relations of confirmation signal code word and symbol by this information, describe no longer one by one herein.
Preferably, the embodiment of the present invention provides a kind of concrete method for transmitting signals, and the mapping relations in the method are embodied by the form of network code table.Concrete, as shown in Figure 8, if first user and the second user send is QPSK signal, the method for transmitting signals that the embodiment of the present invention provides is:
S801, trunking determine the signal code word received be by the first channel the first signal code word received and the secondary signal code word received by second channel and;
S802, according to channel condition information determination planisphere: S=H 1s a+ H 2s b, wherein, H 1be specially the state of the first channel, H 2be specially the state of second channel, S a, S b={ 0,1,2,3}, in planisphere, 16 constellation point are according to S astate difference is divided into 4 bunches;
S803, to determine bunch between Euclidean distance and, use d ijrepresent the i-th bunch of distance to individual bunch of jth.Bunch spacing of QPSK symbol and can being expressed as find respectively from the constellation point of each bunch make and they are used unified symbolically, and get rid of from constellation point by minimum constellation point in network code table;
S804, determine in planisphere, whether remaining constellation point number is zero, if not, continue to perform S603, if so, perform S605;
The position of signal code word in planisphere received determined by S805, trunking, and determine according to network code table the coded identification that this signal code word is corresponding;
The attribute information of coded identification corresponding for mixed signal and network code table is sent to first user and the second user by S806, trunking.
Concrete, suppose H 1=1, H 2=0.9e j π 4;
S=H 1s a+ H 2s b=S a+ 0.9e j π/4s b, the planisphere now determined as shown in Figure 9, according to S adifferent constellation point in Fig. 9 being divided into 4 bunches, can determining 2 ' constellation point in bunch 0 by calculating, 3 ' constellation point in bunch 1,0 ' constellation point in bunches 2, in bunches 3,1 ' constellation point Distance geometry is minimum.These four constellation point are defined as same symbol.In remaining constellation point, 3 ' constellation point in bunch 0,0 ' constellation point in bunches 3,1 ' constellation point Distance geometry in 2 ' constellation point in bunch 1 and bunches 2 is minimum.They are defined as same symbol again.The like, combinations of states is defined as follows:
{S a,S b}＝{{0,2},{1,3},{2,0},{3,1}}＝S 0
{S a,S b}＝{{0,3},{1,2},{2,1},{3,0}}＝S 1
{S a,S b}＝{{0,1},{1,0},{2,3},{3,2}}＝S 2
{S a,S b}＝{{0,0},{1,1},{2,2},{3,3}}＝S 3
Its network code table is as shown in table 2:
0 1 2 3
0 3 2 0 1
1 2 3 1 0
2 0 1 3 2
3 1 0 2 3
Table 2H 1=1, H 2=0.9e j π/4corresponding network code table
After exchanging corresponding states, coding such as its standard network such as structure such as grade is as shown in table 3:
0 1 2 3
0 0 1 2 3
1 1 0 3 2
2 2 3 0 1
3 3 2 1 0
Table 3H 1=1, H 2=0.9e j π/4corresponding standard network coding schedule
Now, suppose that signal that user side sends be the signal code word that first user sends is 0, the signal code word that second user sends is 2, namely { 0,2}, and due to the existence of noise, Codeword Sets corresponding to the signal code word that relay reception arrives is { 1,3}, due to { 0,2}, { 1, the symbol that 3} is corresponding in network code table is 0, so the signal being broadcast to user after relaying coding is constant, the signal that user still can send according to oneself and the signal received correctly determine the signal of another user, realize information exchange.
When time, i.e. H 1=1, H 2=1.6e j pi/2, the planisphere of its QPSK as shown in Figure 10, according to S aconstellation point in Figure 10 is divided into 4 bunches by difference, and division signals code word combination, obtain corresponding network code table as shown in table 4:
0 1 2 3
0 2 0 1 3
1 3 1 0 2
2 1 3 2 0
3 0 2 3 1
Table 4H 1=1, H 2=1.6e j π 2corresponding network code table
The network forming network coding schedules such as its standard are as shown in table 5:
0 1 2 3
0 0 1 2 3
1 3 2 1 0
2 2 3 0 1
3 1 0 3 2
Table 5H 1=1, H 2=1.6e j pi/2corresponding standard network coding schedule
Below for comparing the mapping method according to most tuftlet spacing determination network code table and single mapping method Performance comparision that adopt the embodiment of the present invention to provide, single mapping refers to the network code according to the QPSK signal constellation (in digital modulation) figure superposition under Gaussian channel.
As shown in figure 11, can find out, in Two-Way model QPSK modulation adopt find Euclidean distance between most tuftlet and the method performance that maps than single modulation of the method for mapping method have certain improvement.And whole process does not affect code check.
As shown in figure 12, the embodiment of the present invention provides a kind of signal transmitting apparatus, comprises receiving element 1201, acquiring unit 1202, determining unit 1203 and transmitting element 1204.Wherein:
Receiving element 1201, for receiving the signal code word from first user and the second user;
Acquiring unit 1202, the channel status of the second channel that channel status and described second user for obtaining the first channel that described first user adopts adopt;
Determining unit 1203, for according to the channel status of the first channel and the channel status of second channel, determine the mapping relations between Codeword Sets and coded identification, Codeword Sets is made up of the first signal code word, secondary signal code word, and the first signal code word of the Codeword Sets that coded identification is corresponding, secondary signal code word meet singularity;
First signal code word is specially: the signal code word that first user can send;
Secondary signal code word has for signal code word that the second user can send;
Codeword Sets is specially: the combination that the first signal code word and secondary signal code word are formed;
Singularity is specially: the different and characteristic traveled through one by one, it is different that first signal code word of the Codeword Sets that coded identification is corresponding, secondary signal code word meet the first signal code word that singularity is in all Codeword Sets ensureing that each coded identification is corresponding, and comprise all first signal code words, secondary signal code word in all Codeword Sets that each coded identification is corresponding is different, and comprises all secondary signal code words.
Concrete, after the signal code word receiving first user and the second user transmission, according to the channel status of the first channel and the mapping relations between the channel status determination Codeword Sets of second channel and coded identification, make the first signal code word in all Codeword Sets corresponding to each coded identification in mapping relations and secondary signal code word meet singularity, ensure that the signal code word that user can send according to the coded identification received and this user determines the signal code word that another user sends.
Transmitting element 1204, determines the coded identification that the Codeword Sets belonging to signal code word of reception is corresponding, and the attribute information of this coded identification and mapping relations is sent to first user and the second user according to mapping relations.
Concrete, first the Codeword Sets belonging to signal code word received is determined, due to receive signal code word by by first channel receive signal code word and formed by the signal code word that second channel receives, and be the signal code word of signal code word by obtaining after the first channel that first user sends by the signal code word that the first channel receives, can according to the signal code word sent by the signal code word of the first channel reception and the channel status determination first user of the first channel, in like manner, also the signal code word that the second user sends can be determined, the signal code word that the first user then determined sends is a first signal code word, the signal code word that the second user determined sends is a secondary signal code word, determine the two Codeword Sets formed, and determine the coded identification that this Codeword Sets is corresponding in mapping relations, and the attribute information of this coded identification and mapping relations is sent to first user and the second user, first user and the second user can determine according to coded identification and mapping relations the Codeword Sets that this coded identification is corresponding, due to the first signal code word of Codeword Sets corresponding to coded identification, secondary signal code word meets singularity, user can find a unique possible Codeword Sets according to the signal code word oneself sent in the Codeword Sets that this coded identification is corresponding, thus the signal code word that another user sends can be determined, realize signal mutual.
According to channel status determination mapping relations, the coded identification that the signal code word of reception is corresponding is determined again according to mapping relations, namely take into account the impact of channel status on Signal transmissions in an encoding process, and then reduce the impact of channel status, improve the robustness of Signal transmissions.
Actual carry out Signal transmissions time, if there is larger noise in channel, after Signal transmissions, the signal code word that receives to be determined by maximum likelihood algorithm, easily the signal code word received is mistaken for the several signal code words nearest with its Euclidean distance, produce blurring, in order to noise decrease is on the impact of Signal transmissions, one group of signal code word that Euclidean distance can be made nearest is a corresponding coded identification in mapping relations, even if then signal code word is obscured, result after coding is still constant, and the signal being broadcast to user is also constant.For signal code word be the signal code word received by the first channel and the signal code word received by second channel and form, preferably, the channel status of determining unit 1203 according to the first channel and the channel status of second channel, determine the mapping relations between Codeword Sets and coded identification, specifically for:
According to the channel status H of the first channel 1and the channel status H of second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, the first signal code word S that the signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmeet singularity, signal code word S meets S=H 1s a+ H 2s b, the first signal code word S afor the signal code word that first user can send, secondary signal code word S bbe the signal code word that the second user can send, and the Euclidean distance existed in a signal code word combination between each signal code word S and be all equal numbers and the first signal code word S of correspondence a, secondary signal code word S beuclidean distance between the signal code word S meeting singularity and minimum value.
Signal code word S is specially: the signal code word received, this sentence the signal code word received be by the first channel the signal code word received and the signal code word received by second channel and be example, can according to S=H 1s a+ H 2s bdetermine the signal code word S that the first signal code word in a Codeword Sets, secondary signal code word are corresponding, wherein S abe the first signal code word, S bfor secondary signal code word.
Signal code word combination is specially: the combination of signal code word S, the number of the signal code word S wherein comprised and S aor S btotal number identical, S in the embodiment of the present invention awith S btotal number identical, the corresponding coded identification of each signal code word combination.
The first signal code word that signal code word S in signal code word combination is corresponding, secondary signal code word meet singularity, be specially: the first signal code word that the signal code word S in this signal code word combination is corresponding is different, and comprise all first signal code words, the secondary signal code word that signal code word S in this signal code word combination is corresponding is different, and comprising all secondary signal code words, the first signal code word that wherein signal code word S is corresponding and secondary signal code word can according to S=H 1s a+ H 2s bdetermine.
When determining mapping relations, first determine all first signal code word S that first user can send a, and all secondary signal code word S that the second user can send b, thus draw the first signal code word S awith secondary signal code word S ball Codeword Sets that can form; By the first signal code word S in each Codeword Sets awith secondary signal code word S bsubstitute into S=H 1s a+ H 2s b, obtain the signal code word S that this Codeword Sets is corresponding, determine number and the first signal code word S aor the first signal code word S bidentical, corresponding the first signal code word S of total number aall not identical and Euclidean distance and minimum one group of signal code word S, form a signal code word combination, by corresponding for this signal code word combination coded identification, the all corresponding coded identification of all signal code word S then in this signal code word combination, the Codeword Sets also corresponding coded identification that all signal code word S are corresponding; Determine the mapping relations of other signal code word combination and coded identification again according to any coded system, just obtain the first signal code word S awith secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification.
The one group of signal code word S making Euclidean distance nearest belongs to a signal code word combination in mapping relations, a corresponding coded identification, even if then signal code word is obscured, the result after coding is still constant, the signal being broadcast to user is also constant, due to the S that the signal code word S in signal code word combination is corresponding a, S bmeet singularity, user still according to the signal of correct another user of determination of the signal of oneself, thus can reduce the impact of noise on Signal transmissions.
Because these mapping relations are according to S=H 1s a+ H 2s bdetermine, and H 1be specially the channel status of the first channel, H 2be specially the channel status of second channel, therefore also can reduce the impact of channel disturbance on Signal transmissions carrying out encoding according to this mapping relations.The robustness of Signal transmissions can be improved.
Preferably, can by determining the signal codeword set of signal code word S and determining mapping relations to the form that it carries out sub-clustering, concrete, according to the channel status H of described first channel in determining unit 1203 1and the channel status H of described second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, specifically for:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, respectively by S in signal codeword set aor S bidentical signal code word S is defined as cluster;
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
From signal codeword set, remove each signal code word that signal code word combination comprises, form new signal codeword set, utilize new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
Wherein, between bunch Euclidean distance and be specially: in each bunch, respectively get a signal code word S form one group, calculate this group signal code word S Euclidean distance between any two and, between being bunch Euclidean distance and.
Certainly, those skilled in the art can adopt other feasible patterns to determine this mapping relations, describes no longer one by one herein.
During by determining the signal codeword set of signal code word S and determining mapping relations to its form of carrying out sub-clustering, further, determining unit 1203 utilizes new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, specifically for:
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
From signal codeword set, remove each signal code word that this signal code word combination comprises, form new signal codeword set, repeat above-mentioned steps, determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
Certainly, those skilled in the art can adopt other modes to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and other coded identifications, describe herein no longer one by one.
In practical application, can be realized S in signal codeword set by planisphere aor S bidentical signal code word S is defined as cluster, concrete, and determining unit 1203 is by S in signal codeword set aor S bidentical signal code word S is defined as cluster, specifically comprises:
Determine the planisphere of signal codeword set, according to planisphere by S avalue or S bthe signal code word S that value is identical is defined as cluster;
Then Euclidean distance between making bunch is formed a signal code word combination with the signal code word S in minimum each bunch by determining unit 1203, specifically for:
According to planisphere plan range between making bunch formed a signal code word combination with the signal code word S in minimum each bunch.
Between can being determined very intuitively bunch by planisphere, the signal code word combination formed with the signal code word S in minimum each bunch of Euclidean distance, reduces the complexity calculated.
Certainly, those skilled in the art can adopt between other feasible pattern determination elements Euclidean distance with minimum signal code word combination, describes no longer one by one herein.
Because the mapping relations of signal code word and symbol are according to S=H 1s a+ H 2s bset, in practical application, in order at utmost reduce the impact of channel on Signal transmissions, can when trunking receive the first signal code word and secondary signal code word, trunking obtains the channel status of the first channel and second channel; Or
Trunking, according to the channel status of the first channel obtained when reaching setting cycle and second channel, determines current channel condition.
Concrete, if relaying obtains channel status according to setting cycle, if in same period, relaying repeatedly receives the information that two users send, the state of channel when then can determine at every turn to receive according to the Changing Pattern of the channel status obtained before and channel status the information that user sends, or, when channel status is stablized or cycle of setting is shorter, the state of channel when the channel status obtained before is received the information of user's transmission as this, further, also can using the mean value of the channel status obtained several times before as receive at every turn user send information time channel state.
Certainly, those skilled in the art also can adopt other feasible patterns to obtain channel status, describes no longer one by one herein.
Preferably, the mapping relations in the embodiment of the present invention can be embodied by the form of network code table.
By the embodiment mapping relations that the form of network code table can be cheer and bright, preferably, for the network code that QPSK maps, can in advance for 24 heterogeneous network coding schedules of QPSK arrange numbering, then signal code word can be the numbering that this network code table is corresponding with the attribute information of the mapping relations of symbol.According to numbering, user just can determine which coding schedule trunking place coding uses, thus can determine the signal code word of another user according to network code table and the signal code word of self, realizes the exchange of data.
Certainly, those skilled in the art also can adopt other feasible patterns to set the attribute information being transferred to the signal code word of user and the mapping relations of symbol, user can the mapping relations of confirmation signal code word and symbol by this information, describe no longer one by one herein.
The signal transmitting apparatus that the embodiment of the present invention provides is that the method for transmitting signals provided with the embodiment of the present invention is corresponding, is applicable to all specific embodiments of the method for transmitting signals that the embodiment of the present invention provides.
Embodiments provide a kind of method that coding schedule Network Based sets up communication, method for transmitting signals and device, after trunking receives signal code word, according to the first signal code word that the channel status determination coded identification obtained and first user send, mapping relations between the Codeword Sets that the secondary signal code word that second user sends is formed, the coded identification that the signal code word of reception is corresponding is determined again according to mapping relations, and coded identification and mapping relations attribute information are sent to user, realize information interaction, because mapping relations are determined according to channel status, reduce the impact of channel disturbance on Signal transmissions, improve the robustness of Signal transmissions.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (20)

1. coding schedule Network Based sets up a method for communication, it is characterized in that, comprising:
Receive the signal code word from first user and the second user, obtain the channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt;
According to the channel status of described first channel and the channel status of described second channel, determine the mapping relations between Codeword Sets and coded identification, described Codeword Sets is made up of the first signal code word, secondary signal code word, described first signal code word is the signal code word that first user can send, described secondary signal code word is the signal code word that the second user can send, and the first signal code word of the Codeword Sets that each coded identification is corresponding, secondary signal code word meet singularity;
The network code table of the mapping relations characterized between described Codeword Sets and coded identification is sent to described first user and described second user.
2. method according to claim 1, is characterized in that, according to the channel status of described first channel and the channel status of described second channel, determines the mapping relations between Codeword Sets and coded identification, specifically comprises:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, the first signal code word S that the signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmeet singularity, described signal code word S meets S=H 1s a+ H 2s b, and the Euclidean distance existed in a described signal code word combination between each signal code word S and be all equal numbers and the first signal code word S of correspondence a, secondary signal code word S beuclidean distance between the signal code word S meeting singularity and minimum value.
3. method as claimed in claim 2, is characterized in that, the described channel status H according to described first channel 1and the channel status H of described second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, specifically comprise:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, respectively by S in described signal codeword set aor S bidentical signal code word S is defined as cluster;
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
From described signal codeword set, remove each signal code word that described signal code word combination comprises, form new signal codeword set, utilize described new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
4. method as claimed in claim 3, is characterized in that, describedly utilizes described new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, specifically comprises:
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
From signal codeword set, remove each signal code word that this signal code word combination comprises, form new signal codeword set, repeat above-mentioned steps, determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
5. method as claimed in claim 3, is characterized in that, the described channel status H according to described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, respectively by S in described signal codeword set aor S bidentical signal code word S is defined as cluster, specifically comprises:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, and determine the planisphere of described signal codeword set, according to described planisphere respectively by S avalue or S bthe signal code word S that value is identical is defined as cluster;
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, specifically comprises:
According to described planisphere plan range between making bunch formed a signal code word combination with the signal code word S in minimum each bunch.
6. the method for claim 1, is characterized in that, the channel status of the second channel that the channel status of the first channel that the described first user of described acquisition adopts and described second user adopt, specifically comprises:
The channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt is obtained when receiving described first signal code word and described secondary signal code word; Or
According to the channel status of the second channel that the channel status and described second user that obtain the first channel that described first user adopts when reaching setting cycle adopt.
7. a method for transmitting signals, is characterized in that, comprising:
Receive the signal code word from first user and the second user, obtain the channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt;
According to the channel status of described first channel and the channel status of described second channel, determine the mapping relations between Codeword Sets and coded identification, described Codeword Sets is made up of the first signal code word, secondary signal code word, described first signal code word is the signal code word that first user can send, described secondary signal code word is the signal code word that the second user can send, and the first signal code word of the Codeword Sets that each coded identification is corresponding, secondary signal code word meet singularity;
Determine the coded identification that the Codeword Sets belonging to described signal code word of reception is corresponding according to described mapping relations, and the attribute information of this coded identification and described mapping relations is sent to described first user and described second user.
8. method as claimed in claim 7, is characterized in that, described according to the channel status of described first channel and the channel status of described second channel, determines the mapping relations between Codeword Sets and coded identification, specifically comprises:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, the first signal code word S that the signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmeet singularity, described signal code word S meets S=H 1s a+ H 2s b, and the Euclidean distance existed in a described signal code word combination between each signal code word S and be all equal numbers and the first signal code word S of correspondence a, secondary signal code word S beuclidean distance between the signal code word S meeting singularity and minimum value.
9. method as claimed in claim 8, is characterized in that, the described channel status H according to described first channel 1and the channel status H of described second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, specifically comprise:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, respectively by S in described signal codeword set aor S bidentical signal code word S is defined as cluster;
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
From described signal codeword set, remove each signal code word that described signal code word combination comprises, form new signal codeword set, utilize described new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
10. method as claimed in claim 9, is characterized in that, describedly utilizes described new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, specifically comprises:
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
From signal codeword set, remove each signal code word that this signal code word combination comprises, form new signal codeword set, repeat above-mentioned steps, determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
11. methods as claimed in claim 9, is characterized in that, the described channel status H according to described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, respectively by S in described signal codeword set aor S bidentical signal code word S is defined as cluster, specifically comprises:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, and determine the planisphere of described signal codeword set, according to described planisphere respectively by S avalue or S bthe signal code word S that value is identical is defined as cluster;
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, specifically comprises:
According to described planisphere plan range between making bunch formed a signal code word combination with the signal code word S in minimum each bunch.
12. methods as claimed in claim 7, is characterized in that, the channel status of the second channel that the channel status of the first channel that the described first user of described acquisition adopts and described second user adopt, specifically comprises:
The channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt is obtained when receiving described first signal code word and described secondary signal code word; Or
According to the channel status of the second channel that the channel status and described second user that obtain the first channel that described first user adopts when reaching setting cycle adopt.
13. methods as claimed in claim 7, is characterized in that, described mapping relations are embodied by the form of network code table; The attribute information of described mapping relations is specially the numbering of network code table corresponding to the described mapping relations that pre-set.
14. 1 kinds of signal transmitting apparatus, is characterized in that, comprising:
Receiving element, for receiving the signal code word from first user and the second user;
Acquiring unit, the channel status of the second channel that channel status and described second user for obtaining the first channel that described first user adopts adopt;
Determining unit, for according to the channel status of described first channel and the channel status of described second channel, determine the mapping relations between Codeword Sets and coded identification, described Codeword Sets is made up of the first signal code word, secondary signal code word, described first signal code word is the signal code word that first user can send, described secondary signal code word is the signal code word that the second user can send, and the first signal code word of the Codeword Sets that each coded identification is corresponding, secondary signal code word meet singularity;
Transmitting element, for determining coded identification corresponding to Codeword Sets belonging to the described signal code word that receives according to described mapping relations, and sends to described first user and described second user by the attribute information of this coded identification and described mapping relations.
15. devices as claimed in claim 14, is characterized in that, the channel status of described determining unit according to described first channel and the channel status of described second channel, determine the mapping relations between Codeword Sets and coded identification, specifically for:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, the first signal code word S that the signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmeet singularity, described signal code word S meets S=H 1s a+ H 2s b, and the Euclidean distance existed in a described signal code word combination between each signal code word S and be all equal numbers and the first signal code word S of correspondence a, secondary signal code word S beuclidean distance between the signal code word S meeting singularity and minimum value.
16. devices as claimed in claim 15, it is characterized in that, described determining unit is according to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the first signal code word S that signal code word S in each signal code word combination is corresponding a, secondary signal code word S bmapping relations between the Codeword Sets formed and coded identification, specifically for:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, respectively by S in described signal codeword set aor S bidentical signal code word S is defined as cluster;
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
From described signal codeword set, remove each signal code word that described signal code word combination comprises, form new signal codeword set, utilize described new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
17. devices as claimed in claim 16, is characterized in that, described determining unit utilizes described new signal codeword set to determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, specifically for:
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, and the first signal code word S corresponding to signal code word S in this signal code word combination is set a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and a coded identification;
From signal codeword set, remove each signal code word that this signal code word combination comprises, form new signal codeword set, repeat above-mentioned steps, determine the first signal code word S that signal code word S in other signal code word combination is corresponding a, secondary signal code word S bcorresponding relation between the Codeword Sets formed and other coded identifications, until the number of signal code word S is zero in each bunch.
18. devices as claimed in claim 16, it is characterized in that, described determining unit is according to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, respectively by S in described signal codeword set aor S bidentical signal code word S is defined as cluster, specifically for:
According to the channel status H of described first channel 1and the channel status H of described second channel 2, determine the signal codeword set of signal code word S, and determine the planisphere of described signal codeword set, according to described planisphere respectively by S avalue or S bthe signal code word S that value is identical is defined as cluster;
Euclidean distance between making bunch formed a signal code word combination with the signal code word S in minimum each bunch, specifically comprises:
According to described planisphere plan range between making bunch formed a signal code word combination with the signal code word S in minimum each bunch.
19. devices as claimed in claim 14, is characterized in that, described acquiring unit specifically for:
The channel status of the second channel that the channel status of the first channel that described first user adopts and described second user adopt is obtained when receiving described first signal code word and described secondary signal code word; Or
According to the channel status of the second channel that the channel status and described second user that obtain the first channel that described first user adopts when reaching setting cycle adopt.
20. devices as claimed in claim 14, is characterized in that, described mapping relations are embodied by the form of network code table; The attribute information of described mapping relations is specially the numbering of network code table corresponding to the described mapping relations that pre-set.
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