CN101217302A - A collaborative communication method in multi-user wireless network based on time space diversity encoding and decoding - Google Patents
A collaborative communication method in multi-user wireless network based on time space diversity encoding and decoding Download PDFInfo
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- CN101217302A CN101217302A CNA2008100563909A CN200810056390A CN101217302A CN 101217302 A CN101217302 A CN 101217302A CN A2008100563909 A CNA2008100563909 A CN A2008100563909A CN 200810056390 A CN200810056390 A CN 200810056390A CN 101217302 A CN101217302 A CN 101217302A
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Abstract
The invention discloses a collaborative communication method in a multi-user wireless network, which is based on space diversity encoding and decoding and belongs to the technical field of wireless communication in the multi-user wireless network, and is characterized in that in a collaborative communication system that consists of a mobile terminal and a base station having the ability of multi-user connecting and managing, information sent and received between a terminal and a partner terminal are sequences punctured by an encoding sequence owned by each terminal, and the terminal implements matching and decoding according to a code word of the partner terminal after receiving the encoded sequence of the partner terminal, if succeeds, the terminal re-encodes and sends a check bit with the puncturing of the partner terminal removed, otherwise the terminal sends a check bit with the puncturing owned by itself removed and switches into a non-collaborative communication mode, wherein, the invention comprises collaborative encoding and decoding between the terminals and between the base stations simultaneously. The invention leads the collaborative communication system of the terminals to acquire encoding gain and diversity gain with a plurality of antennas, and under the condition that the antenna number of the base station is not increased; the invention acquires greater diversity gain of the antenna array and increases communication system capacity from two aspects.
Description
Technical field
The invention belongs to wireless communication field, particularly relate to a kind of in the multi-user wireless network under the fading channel collaborative communication method based on time space diversity encoding and decoding.
Background technology
Along with the quick growth of high-speed radio business demand, the throughput that needs to improve unit bandwidth also will guarantee multi-user's service quality simultaneously to be fit to the higher data transfer rate of more user's transmission.In the communication of point-to-point, the capacity between the transmitter and receiver has been subjected to the restriction of noise level of available bandwidth, channel transmitted environment and receiver etc.In multi-user's system, the capacity of network also has been subjected to the constraint of the factors such as noise jamming on the method for salary distribution, channel circumstance and the subcarrier of frequency spectrum resource.At present, multiple access protocol as time division multiple access, frequency division multiple access and code division multiple access, is used for distributing different usable spectrum resources according to user's different data transfer rate demand.But much seriously influence factor,, restricted the development of high-speed wideband communication as channel fade conditions, interference level and QoS requirement.
Transmission channel the time become multipath characteristics, be Fundamentals that influence the wireless transmission reliability.Will improve the communication quality under the multidiameter fading channel effectively or reduce the error rate, be very difficult.For example, uncoded binary phase shift keying (BPSK) is under additivity additive white Gaussian (AWGN) channel, and the error rate of channel is from 10
-2Drop to 10
-3, only need the transmitting power about the extra 2dB of increasing; And under multidiameter fading channel,, need the above transmitting power of the extra 10dB of increasing in order to reach above-mentioned effect.But it is infeasible only improving communication reliability by raising transmitting power or bandwidth, because the trend of the broadband wireless communications of a new generation is miniaturization, low power consumption.
A lot of technology are used for reducing the influence of multipath fading by the mode of signal diversifying, make up to obtain diversity gain according to certain mode at the signal of receiver with the separate fading channel that obtains.In space diversity scheme, many antennas are used for receiving or transmitting, and the decline that the distance of antenna need satisfy on the every antenna is independently, and promptly the distance of antenna is a correlation distance.In frequency diversity scheme, signal is in several different frequency band transmission.In the time diversity scheme, signal utilizes chnnel coding to add usually and interweaves to realize time diversity in different slot transmission.In a polarization diversity scheme, the antenna of two different polarised directions is used for receiving or the transmission signal.
In the wireless communication system in modern times, space diversity often is used.In order to obtain space diversity gain, need on transmitter or receiver, to carry out the spatial manipulation of aerial array.So far, multiple-input and multiple-output (MIMO) and beam shaping obtain studying the most widely, and are proved to be the capacity and the performance that can improve radio communication effectively.In when grouping constant environment, equipped N for one
tIndividual transmitting antenna and N
rThe good space and time diversity coded system maximum of individual reception antenna can obtain N
t* N
rOrder of diversity.The space and time diversity coded system can adopt space-time grid code and Space-Time Block Coding.
Because the capacity of mimo system and performance seriously rely on the correlation of the dimension and the antenna of antenna, for obtaining higher power system capacity and more performance, transmitter and receiver needs the big size and the aerial array of dispersion.But in actual applications, volume size, hardware complexity, power consumption and the expense of wireless terminal (as most handheld device, wireless sensor network node) has been subjected to strict restriction so that an antenna can only have been arranged, hinder the use of big aerial array like this, thereby influenced the diversity gain of many antennas.
Simultaneously, for the base station, increase antenna number and corresponding processing complexity and may surpass the benefit that the capacity lifting brings, further, in order to obtain the benefit of extra capacity, need to increase extra antenna in the many or all base stations in the wireless network, the constraint of expense and physical condition has also limited the use of big aerial array in the base station.
Summary of the invention
The present invention proposes a kind of collaborative decoding method and communication system thereof, this communication system can automatically be switched between communication for coordination pattern and non-communication for coordination pattern, and the collaborative encoding and decoding that it had both comprised between the terminal also comprise the collaborative encoding and decoding between the base station.The benefit of a maximum of the present invention is need not increase any extra antenna in user and base station, by working in coordination with decoding method to obtain extra capacity.Characteristics of the present invention are that the collaborative decoding method that up link adopts does not rely on concrete coded system, promptly can convolution codes, and also can be linear block codes or the combination of the two; Another characteristics of the present invention are that the Space Time Coding that is adopted both can be the space-time grid coding, also can be Space-Time Block Codings; The access control that another characteristics of the present invention are multi-users does not rely on concrete access protocol, promptly can be that ripe at present time division multiple access inserts (TDMA), frequency division multiple access inserts (FDMA) and code division multiple access inserts (CDMA), also can be other similar access protocols.
A purpose of the present invention provides a kind of communication for coordination system, and this communication system comprises the extremely limited mobile terminal device of volume and power consumption and the base station equipment two parts with multi-user's access capability and managerial ability.
Can directly send and receive message between the wherein different terminals, also can direct communication between terminal and the base station.One terminal and another terminal (title partner terminal) constitute a collaborative terminal, and terminal and its collaborative terminal room adopt collaborative coded system to communicate.The sequence of terminal after the information that its collaborative terminal sends be own coded sequence punching, the information of Jie Shouing is the sequence after self coded sequence of the transmission of its collaborative terminal punches simultaneously, terminal concerns with the communication coordinated that its collaborative terminal is a kind of symmetry.Terminal receives the coded sequence that its collaborative terminal sends, code word generator polynomial or check matrix according to its collaborative terminal carry out the rate matching and decoding, as the then recompile and send the check bit of its collaborative terminal punching deletion of success of decoding, as it is unsuccessful to decode, then transmit the check bit of the deletion of self punching, then terminal is converted to non-communication for coordination pattern.
Can send and receive information between the wherein different base stations, a base station and another base station constitute a collaborative base station, and antenna separately can be shared in base station and its collaborative base station, works in coordination with space-time coding/decoding.The information that sends between base station and its collaborative base station and receive comprises synchronizing information, user profile etc.
Another object of the present invention provides a kind of collaborative decoding method of terminal.In up link by a kind of collaborative encoding and decoding deversity scheme to obtain coding gain and emission diversity gain simultaneously, the terminal of single antenna is by a kind of method of collaborative encoding and decoding, share separately antenna with other users constituting a virtual mimo system, when obtaining coding gain and then obtain the diversity gain of many antennas.
Collaborative decoding method of the present invention is worked in coordination with different terminals and is carried out encoding and decoding, and may further comprise the steps: step 1, terminal is carried out chnnel coding with the information of oneself according to code check R, obtains the coded sequence that length is N, but sends a code check R
1Length greater than R is N
1 Coded sequence.Step 2, its partner receives code check R
1Length be N
1Coded sequence after, carry out channel-decoding.As the success of decoding, be N-N then with recompile and remaining length of sending the partner
1Check bit.As the failure of decoding, the then remaining check bit of transmission oneself.Step 3, terminal and its partner carry out Space Time Coding to the coded sequence that sends, and by its antenna transmission.
Wherein, chnnel coding is by bringing up to R with its code check from R to the mode of check digit punching
1, its partner is filled to 0 with the check bit of punching, and the mode of utilance coupling is decoded, and recovers its message part that receives and the generation check bit of encoding again.
Wherein, judging decodes successfully both can judge by CRC check, also can judge by the check matrix of block code self, can also judge by self check matrix and CRC cascade.
Wherein, Space Time Coding carries out mesh mapping or grouping convolution by the information sequence to input, generates the Space Time Coding sequence and be assigned on the antenna of terminal to send.
A further object of the present invention provides a kind of collaborative decoding method of base station.A plurality of base stations are collaborative to be received and transmission information, reaches bigger diversity gain with the effective antenna number that improves the base station.
Collaborative base station reception information may further comprise the steps: step 1, each base station receive the signal that collaborative terminal sends over.Step 2, base station are carried out Synchronous Processing to the received signal.Step 3, the base station is worked in coordination with when carrying out sky and is decoded.Step 4, information distribution is carried out to the user in the decoding back when empty.
Wherein, the signal of each antenna for base station reception comprises the signal of each antenna transmission of terminal.
Wherein, according to relative position relation and apart from the factors such as distribution of distance and antenna the signal that each antenna receives is carried out Synchronous Processing between a plurality of base stations.
Wherein, a plurality of base stations empty time decoding that the signal of finishing is synchronously worked in coordination with.
Wherein, decoded sequence is carried out User Recognition according to the difference of access way when empty, thereby the user is carried out information distribution.
Collaborative base station transmission information may further comprise the steps: step 1, a plurality of users' information are carried out information and are merged.Step 2, the collaborative Space Time Coding that carries out in base station.Step 3, the base station information after to Space Time Coding is carried out Synchronous Processing.Step 4, go out the information after synchronous each base station by antenna transmission.
Wherein, a plurality of users carry out user profile according to certain access way and merge, and merging can be passed through TDMA, modes such as CDMA and FDMA.
Wherein, Space Time Coding is carried out according to the user profile that space-time grid encoding state figure or space-time block code matrix are combined in a plurality of base stations.
Wherein, according to relative position relation and apart from the factors such as distribution of distance and antenna the signal that each antenna receives is carried out Synchronous Processing between a plurality of base stations.
Wherein, the data after the Synchronous Processing are delivered on each antenna of each base station, launch according to certain power.
The invention is characterized in, in the multi-user wireless network based on the collaborative communication method of time space diversity encoding and decoding, it is characterized in that, this be a kind of by terminal (A) and as the common collaborative terminal inner that constitutes of its partner's terminal (B) and described collaborative terminal in collaborative communication method between each terminal and the base station, its steps in sequence is as follows:
Step (1) contains successively in the 1st frame and has the following steps:
Data length step (1.1) terminal (A) is encoded oneself by code check R after is that the coded sequence of N punches, and sends code check to described base station and is equivalent to R
1Length be N
1The Space Time Coding sequence, R
1＞R sends code check to terminal (B) simultaneously and is equivalent to described R
1Length be N
1The Space Time Coding sequence;
Data length step (1.2) terminal (B) is encoded oneself by code check R after is that the coded sequence of N punches, and sends code check to described base station and is equivalent to R
1Length be N
1The Space Time Coding sequence, simultaneously send code check and be equivalent to described R to terminal (A)
1Length be N
1The Space Time Coding sequence;
Step (2) contains following steps successively in the 2nd frame:
Step (2.1) terminal (B) is received the Space Time Coding sequence that terminal (A) sends in step (1.1) after, carry out the rate matching and decoding according to the decoding process with terminal (A) agreement, the message part of decoding its reception of back is encoded again and is generated data bit N
2, as the success of decoding, then decoded sequence is encoded according to carrying out the rate coupling with the coded system of terminal (A) agreement, and the N in the sequence of coding back
2The data of bit terminal (A) send in the past to described base station, N
2Be N-N
1Check bit;
Step (2.2) then sends the described N of self if terminal (B) decoding is failed to described base station
2Bit data changes non-communication for coordination pattern automatically over to;
Step (2.3) terminal (A) is received the Space Time Coding sequence that terminal (B) sends in step (1.2) after, equally according to step (2.1)---the described method of step (2.3) is handled.
Described base station be one by base station (1) and the collaborative base station that constitutes as its partner's base station (2), realize the communication for coordination of the first collaborative terminal between the second collaborative terminal that constitutes by terminal (C), terminal (D) that constitutes by described terminal (A), terminal (B) according to the following steps:
Step (A) base station (1), base station (2) are the Space Time Coding sequence of receiving terminal (A), terminal (B) transmission respectively, obtains data (1) and data (2) separately after decoding during successively through multi-user space, the collaborative decoding;
Base station, step (B) base station (1) (2) separately data (1), data (2) for after the user carries out Space Time Coding, send to terminal (C), terminal (D) respectively separately;
Step (C) terminal (C), terminal (D) obtain data (1) and data (2) after decoding when process is worked in coordination with coding, multi-user space successively separately.
Described base station be one by base station (1) and the collaborative base station that constitutes as the collaborative base station that its partner's base station (2) constitutes, carry out the collaborative encoding and decoding of base station according to the following steps:
Each base station of step (3.1) receives the next information of antenna transmission of each terminal in the collaborative terminal;
Between each base station of step (3.2) according to comprise relative position relation at least, each factor in being distributed in apart from distance and antenna carries out Synchronous Processing to the information that each antenna receives;
The Space Time Coding that the information of each base station of step (3.3) after to Synchronous Processing is worked in coordination with;
Decoded sequence was carried out multi-user's identification according to the difference of access way when step (3.4) was empty;
Step (3.5) is carried out information distribution to the user according to the following steps:
Step (3.5.1) merges a plurality of users' the information information of carrying out;
The collaborative Space Time Coding that carries out in each base station of step (3.5.2);
The information of each base station of step (3.5.3) after to Space Time Coding (3.2) is set by step carried out Synchronous Processing;
Each base station of step (3.5.4) sends the information after synchronous.
For the effect that illustrates that the present invention brings, in table 1, provided experimental data of the present invention, experiment condition is 2 and has only the terminal use of 1 antenna to constitute a collaborative terminal that 2 base stations constitute a collaborative base station, terminal employing R=1/2, R
1The collaborative code encoding/decoding mode of=2/3 code check, having provided in table 1 under different signal to noise ratios between 2 terminals in the error rate is 10
-5The time performance gain that obtained.
Table 1 performance gain of the present invention
| Channel signal to noise ratio between the user | Gain |
| 0dB | 1.5dB |
| 10dB | 4dB |
| 20dB | 8dB |
Description of drawings
Fig. 1. communication for coordination system principle diagram of the present invention.
Fig. 2. communication for coordination system up-link schematic diagram.
Fig. 3. communication for coordination system down link schematic diagram.
Fig. 4. collaborative decoding method schematic diagram.
Fig. 5. collaborative convolution encoding and decoding schematic diagram.
Fig. 6. collaborative LDPC encoding and decoding schematic diagram.
Fig. 7. the Space-Time Block Coding schematic diagram.
Fig. 8. based on the collaborative encoding and decoding uplink map in the base station of OFDMA.
Fig. 9. based on the collaborative encoding and decoding downlink map in the base station of OFDMA.
Figure 10. based on the communication for coordination systematic schematic diagram of OFDMA.
Figure 11. FB(flow block) of the present invention.
Embodiment
Now in conjunction with the accompanying drawings embodiments of the invention are described in detail.
In Fig. 1, comprised collaborative terminal 101 and 104, also comprised base station 102 and 103.Wherein collaborative terminal 101 is made of two terminal A and terminal B, and terminal A and terminal B are because the restriction of factors such as volume separately and power consumption has an antenna separately, and terminal A and terminal B carry out communication for coordination and constitute collaborative terminal 101.Collaborative terminal 104 is made of two terminal C and D, and terminal C and terminal D are because the restriction of factors such as volume separately and power consumption, and terminal C and terminal D are carried out communication for coordination and constituted collaborative terminal 104.Collaborative communication between terminals mode will be explained in the back in detail.Base station 102 and 103 can have many antennas separately, and base station 102 has 1,2,3,4 four antennas, and 103 have 5,6 in the base station, 7,8 four antennas.Base station 102 and base station 103 can constitute collaborative base station 100, can carry out communication for coordination between the two.For finishing the communication between terminal A and terminal C and terminal B and the terminal D, terminal A and terminal B at first form collaborative terminal 101, terminal C and terminal D are formed collaborative terminal 104, collaborative base station 100 is formed in base station 102 and 103, is communicated by collaborative terminal 101, collaborative base station 100 and collaborative terminal 104.
Communication for coordination system in Fig. 1 can be divided into uplink portion and downlink portion, respectively as shown in Figures 2 and 3.In Fig. 2, terminal A 201 and terminal B 202 constitute a collaborative terminal, they are delivered to collaborative coding module 203 and 204 with data separately and work in coordination with coding, data behind the coding are delivered to multi-user's Space Time Coding 205 and are carried out Space Time Coding, and two antennas by terminal A 201 and terminal B 202 are transmitted to the base station then.There is Nr base station 206
1The root antenna, there is Nr base station 207
2The root antenna, the two constitutes a collaborative base station, receives the signal of self terminal A 201 and terminal B 202.206 and 207 give 208 with the signal that receives decodes when carrying out multi-user space, and decoded data are given 209 and worked in coordination with decoding when empty, obtain data 211 and data 212 after the decoding.
In Fig. 3, data 301 and 302 are delivered to 303 and are carried out multi-user's Space Time Coding, and the data behind the coding are given base station 304 and 305, and the aerial array by 304 and 305 sends.The signals that the collaborative terminal of being made up of terminal C and terminal D 306 receives from 304 and 305 emissions are delivered to 307 and are decoded when carrying out multi-user space, promptly obtain needed data 308 and 309.
In Fig. 4, provided the schematic diagram of the collaborative decoding method of terminal of Fig. 1 communication for coordination system employing.In the 1st frame, the data length after user 1 will ownly encode by code check R is that the coded sequence of N punches, and sends code check to the base station and is equivalent to R
1(R
1＞R) length is N
1Coded sequence 401, send code checks to partner terminal user 2 and be equivalent to R
1(R
1＞R) length is N
1Coded sequence 402; In the 1st frame, the data length after user 2 will ownly encode by code check R is that the coded sequence of N punches, and sends code check to the base station and is equivalent to R
1(R
1＞R) length is N
1Coded sequence 404, send code check to partner terminal user 1 and be equivalent to R
1(R
1＞R) length is N
1Coded sequence 405.In the 2nd frame, after user 2 received coded sequence 402, the decoding process of arranging according to user 1 carried out the decoding of rate matching way, as the success of decoding, then decoded sequence is carried out rate coupling coding according to the coded system of user's 1 agreement, and the N in the back sequence of will encoding
2Bit user 1 data 403 send, and as the decoding failure, then send the N of self
2Bit data changes non-collaborative encoding/decoding mode automatically over to; Equally, after user 1 received coded sequence 405, the decoding process of arranging according to user 2 carried out the decoding of rate matching way, as the success of decoding, and then decoded sequence was carried out rate coupling coding according to the coded system of user's 2 agreements, and the N in the back sequence of will encoding
2Bit user 2 data 406 send, and as the decoding failure, then send the N of self
2Bit data changes non-collaborative encoding/decoding mode automatically over to.In Fig. 5 and Fig. 6, having provided with convolution code and low-density checksum (LDPC) sign indicating number respectively is the collaborative decoding method of example.
In Fig. 5, after user's its data 501 was encoded through Cyclic Redundancy Check 503, coding back data gave rate coupling convolution code 505 codings, and the sequence after encoding through 505 is divided into N
1The data 512 and the N of length
2The data 508 of length, simultaneously, partner's data 502 are through Viterbi decoders 504 decodings, and decoding back data are given 507 and are carried out CRC and carry out verification and 509 and carry out rate coupling convolutional encoding, obtain length N behind 509 codings
2Sequence 509,507 obtain index signal 510 after the verification.According to index signal 510,, then 511 get 509, otherwise get 508 as 510 for CRC check satisfies.Data 511 and 512 are given 513 and are gone emission through synthetic.
In Fig. 6, user's its data 601 through Cyclic Redundancy Check 603 codings after, coding back data are given 605 and are carried out rates coupling LDPC sign indicating number and encode, and are divided into N through the sequence behind 605 codings
1The data 611 and the N of length
2The data 610 of length.Simultaneously, partner's data 602 are through 604 decodings of LDPC sign indicating number decoder, decoding back data are given 607 and are carried out the LDPC sign indicating number and separate code check, as verification succeeds, then enter 608 and carry out CRC check, fail as 607 verifications, then give 614 with 610 data, as 607 and 608 verification succeeds all, then give 614 with 612, give 615 after merging 611 and 614 and go emission.604 decoded results deliver to 606 and carry out RCLDPC sign indicating number coding, with the N among the result behind the coding
2Length gives 612.
At Fig. 2 and multi-user's Space Time Coding employed in figure 3, as shown in Figure 7.Fig. 7 has provided a kind of space-time block code, and data are carried out 701 earlier and carried out the constellation point mapping, and the data after the mapping are delivered to 702 and carried out the Space-Time Block Coding coding, give the antenna emission afterwards.
Fig. 8 has provided the schematic diagram of communicating by letter based on the collaborative encoding and decoding in the base station of OFDM access (OFDMA) with Fig. 9.Fig. 8 is a up link, and Fig. 9 is a down link.In Fig. 8, user's 1 data message 801
1To user N data message 801
NGiving dimension is N
tSpace Time Coding unit 802
1~ 802
NCarry out Space Time Coding, the every N of the data behind the Space Time Coding gives fast fourier transform module 803 in the road
1~ 803
NtCarry out the Fourier transform that N is, the data after the variation are given and are gone here and there and change 804
1~ 804
NtCarry out and go here and there conversion, the serial data stream after the conversion is through 805
1~ 805
NtIncrease Cyclic Prefix, deliver to antenna emission separately.
In Fig. 9, the signal that Nr reception antenna receives is through 901
1~ 901
NrRemove Cyclic Prefix, data are afterwards given string and are changed 902
1~ 902
NrGo here and there and change, the parallel data after the conversion gives 903
1~ 903
NrCarry out fast fourier transform, decoding 904 when being Nr empty that the data after the conversion are given dimension
1~ 904
NrDecode when carrying out sky, can obtain user 1 to user N data.
Figure 10 has provided the schematic diagram based on the communication for coordination system of OFDMA.User data 1001 is distributed to two base stations 1002 and 1003, wherein 1002 and 1003 as Fig. 8 and shown in Figure 9,1002 and 1003 carry out Synchronization Control by 1004, with realize 1002 and 1003 synchronously, 1002 and 1003 results that will work in coordination with encoding and decoding send, corresponding collaborative terminal 1005 has 2 terminals to constitute, and works in coordination with encoding and decoding according to the mode of Fig. 4.
Figure 11 has provided FB(flow block) of the present invention.Its data 1101 of terminal is through rate coupling coding step 1102, coded sequence after step 1103 transmission self punching, then, data 1105 after the partner terminal punching are carried out the rate matching and decoding in step 1104 according to the code word of partner terminal, and it is whether successful in step 1106 judgement decoding, as success, then the decoded information sequence of step 1104 is carried out rate coupling coding according to the code word of partner terminal again in step 1108, and send the check bit data of partner terminal punching deletion in step 1109, unsuccessful as verification, then change the data that step 1107 sends the deletion of self punching over to, change non-communication for coordination pattern automatically over to.
The effect that the present invention obtains mainly comprises two aspects: for terminal, terminal constitutes a collaborative terminal by its partner terminal, has obtained the diversity gain of coding gain and many antennas simultaneously; For the base station, under the situation of the number that does not increase antenna for base station, obtained the diversity gain of bigger aerial array, increased capability of communication system from two aspects.
Although the present invention is described and illustrates with reference to embodiment, and do not mean that the present invention is limited to the execution mode of these descriptions.Embodiments of the invention are that example describes with two users, but can directly extend to multi-user's situation, so the multi-user also belongs to protection scope of the present invention.The present invention is the specific implementation that example has been described communication system with FDMA, but other access mode, as TDMA, CDMA etc. also belong to protection scope of the present invention.Those of ordinary skills can carry out multiple different modification to the present invention in spirit of the present invention and viewpoint, equal variation and the modification of being done according to claims scope of the present invention is all the scope that the present invention protects in every case.
Claims (6)
- In the multi-user wireless network based on the collaborative communication method of time space diversity encoding and decoding, it is characterized in that, this be a kind of by terminal (A) and as the common collaborative terminal inner that constitutes of its partner's terminal (B) and described collaborative terminal in collaborative communication method between each terminal and the base station, its steps in sequence is as follows:Step (1). in the 1st frame, contain successively and have the following steps:Step (1.1). the data length terminal (A) is encoded oneself by code check R after is that the coded sequence of N punches, and sends code check to described base station and is equivalent to R 1Length be N 1The Space Time Coding sequence, R 1＞R sends code check to terminal (B) simultaneously and is equivalent to described R 1Length be N 1The Space Time Coding sequence;Step (1.2). the data length terminal (B) is encoded oneself by code check R after is that the coded sequence of N punches, and sends code check to described base station and is equivalent to R 1Length be N 1The Space Time Coding sequence, simultaneously send code check and be equivalent to described R to terminal (A) 1Length be N 1The Space Time Coding sequence;Step (2). in the 2nd frame, contain following steps successively:Step (2.1). terminal (B) is received the Space Time Coding sequence that terminal (A) sends in step (1.1) after, carry out the rate matching and decoding according to the decoding process with terminal (A) agreement, the message part of decoding its reception of back is encoded again and is generated data bit N 2, as the success of decoding, then decoded sequence is encoded according to carrying out the rate coupling with the coded system of terminal (A) agreement, and the N in the sequence of coding back 2The data of bit terminal (A) send in the past to described base station, N 2Be N-N 1Check bit;Step (2.2). if terminal (B) decoding is failed, then described base station is sent the described N of self 2Bit data changes non-communication for coordination pattern automatically over to;Step (2.3). terminal (A) is received the Space Time Coding sequence that terminal (B) sends in step (1.2) after, equally according to step (2.1)---the described method of step (2.3) is handled.
- 2. in the multi-user wireless network according to claim 1 based on the collaborative communication method of time space diversity encoding and decoding, it is characterized in that, described base station be one by base station (1) and the collaborative base station that constitutes as its partner's base station (2), realize the communication for coordination of the first collaborative terminal between the second collaborative terminal that constitutes by terminal (C), terminal (D) that constitutes by described terminal (A), terminal (B) according to the following steps:Step (A). base station (1), base station (2) are the Space Time Coding sequence of receiving terminal (A), terminal (B) transmission respectively, obtains data (1) and data (2) separately after decoding during successively through multi-user space, the collaborative decoding;Step (B). base station, base station (1) (2) separately data (1), data (2) for after the user carries out Space Time Coding, send to terminal (C), terminal (D) respectively separately;Step (C). terminal (C), terminal (D) obtain data (1) and data (2) after decoding when process is worked in coordination with coding, multi-user space successively separately.
- 3. in the multi-user wireless network according to claim 1 based on the collaborative communication method of time space diversity encoding and decoding, it is characterized in that, described base station be one by base station (1) and the collaborative base station that constitutes as the collaborative base station that its partner's base station (2) constitutes, carry out the collaborative encoding and decoding of base station according to the following steps:Step (3.1). each base station receives the next information of antenna transmission of each terminal in the collaborative terminal;Step (3.2). between each base station according to comprise relative position relation at least, each factor in being distributed in apart from distance and antenna carries out Synchronous Processing to the information that each antenna receives;Step (3.3). the Space Time Coding that the information of each base station after to Synchronous Processing is worked in coordination with;Step (3.4). decoded sequence is carried out multi-user's identification according to the difference of access way when empty;Step (3.5). according to the following steps the user is carried out information distribution:Step (3.5.1). a plurality of users' the information information of carrying out is merged;Step (3.5.2). the collaborative Space Time Coding that carries out in each base station;Step (3.5.3). the information of each base station after to Space Time Coding (3.2) is set by step carried out Synchronous Processing;Step (3.5.4). each base station sends the information after synchronous.
- 4. in the multi-user wireless network according to claim 1 based on the collaborative communication method of time space diversity encoding and decoding, it is characterized in that, CRC check is successfully passed through in described decoding, and the back is perhaps judged by self check matrix and CRC cascade by the check matrix of block code self.
- 5. in the multi-user wireless network according to claim 1 based on the collaborative communication method of time space diversity encoding and decoding, it is characterized in that, described Space Time Coding carries out the network mapping mode by the information sequence to input and is grouping or convolution, and the antenna that generates the Space Time Coding sequence and distribute to collaborative terminal is to send.
- 6. in the multi-user wireless network according to claim 1 based on the collaborative communication method of time space diversity encoding and decoding, it is characterized in that, the coding/decoding method of described agreement is that partner terminal is filled to zero to the check bit of punching earlier, and the utilance matching way is decoded again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102084615A (en) * | 2007-05-07 | 2011-06-01 | 霖那控股私人有限公司 | Cooperative concatenated coding for wireless systems |
| CN102237976A (en) * | 2011-07-04 | 2011-11-09 | 南京邮电大学 | Multiple-input-multiple-output-based wireless network sensor cluster head random-selection interaction method |
| CN101754361B (en) * | 2008-12-05 | 2012-09-05 | 电信科学技术研究院 | Method, system and device for multi-cell joint transmission |
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| US7508798B2 (en) * | 2002-12-16 | 2009-03-24 | Nortel Networks Limited | Virtual mimo communication system |
| CN101056132B (en) * | 2006-04-13 | 2011-04-20 | 上海贝尔阿尔卡特股份有限公司 | Method and device for processing the base band of the space-time/space frequency/space diversity transmitter |
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| CN106100705A (en) * | 2015-12-15 | 2016-11-09 | 浙江师范大学 | The optimization method distributing based on the power of the bit error rate under HDAF agreement |
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| CN108347295B (en) * | 2017-01-25 | 2021-03-05 | 华为技术有限公司 | Data transmission method and device |
| CN108736898A (en) * | 2018-05-31 | 2018-11-02 | 东南大学 | A kind of LDPC code codec multiplexing method suitable for 5G systems |
| CN108736898B (en) * | 2018-05-31 | 2021-09-07 | 东南大学 | LDPC code codec multiplexing method suitable for 5G system |
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