CN101378296B - Method for transmitting layered data - Google Patents
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- CN101378296B CN101378296B CN2007101479598A CN200710147959A CN101378296B CN 101378296 B CN101378296 B CN 101378296B CN 2007101479598 A CN2007101479598 A CN 2007101479598A CN 200710147959 A CN200710147959 A CN 200710147959A CN 101378296 B CN101378296 B CN 101378296B
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Abstract
The invention discloses a hierarchy transmission method based on channel coding and decoding, modulation/demodulation and multi-antenna technology, which comprises two sections of sending and receiving. The sending method comprises the steps: transmission data are carried out channel coding; the data after being coded are carried out hierarchy, the key bits taking into effect to the decoding at a receiving terminal are divided into a first layer, and the others are divided into a second layer; and the data after the hierarchy are modulated, the data at the first layer after modulated are transmitted by adopting the most reliable way at multi-antenna time, whether the data at the second layer after being modulated are selected to be transmitted or not is carried out according to the decryption information received at the receiving terminal. The receiving method comprises the steps of: carrying out the treatments of channel estimation, detection, demodulation and multi-antenna; also comprises the steps of: carrying out decoding to the received data of the first layer and simultaneously judging the decryption, if wrong, a sending terminal is instructed to transmit the data of the second layer and the data of the second layer are received; and the received data are carried out channel decoding by combining hybrid-ARQ merging technology. The invention improves the system performance and the throughput rate.
Description
Technical field
The present invention relates to a kind of method that combines channel coding and decoding technology, layering, modulating/demodulating technology, multi-antenna technology, HARQ technology to come some crucial bit informations of reliable transmission; Relate in particular to the wireless data transmission field, based on the individual-layer data transmission method of channel coding and decoding, modulating/demodulating, many antennas.
Background technology
Follow-on wireless communication system will provide better speech quality, the faster data transmission rate.But, the time multipath transmission environment, limited bandwidth resources and the user that become make above-mentioned requirements implement very difficulty to the demand of service.Effective ways that address these problems are to adopt diversity technique.Diversity technique can be divided into time diversity, frequency diversity and space diversity etc. according to the difference that obtains the independent pathway signal method.With regard to time diversity, frequency diversity and space diversity three, because under the slow fading situation, time domain interweaves and can cause the bigger delay of signal, will introduce interference this moment, thereby the business of delay sensitive is not suitable for; And when the coherence bandwidth of channel greater than apread spectrum bandwidth or delay of signals expansion relatively hour, it is just not too suitable to utilize spread spectrum to obtain frequency diversity; But in most of the cases, space diversity reception to communicate can obtain great diversity gain without the victim signal frequency bandwidth when guaranteeing message transmission rate.
The channel coding and decoding technology is the indispensable link of transmitting chain in the wireless telecommunications.In digital communication, the transmission of data in channel can receive interference of noise, thereby causes the reception information errors.Make signal can be in noisy channel reliable transmission, must add some redundancies for artificially transferred information, Here it is coding.The Turbo code of current trend, LDPC sign indicating number etc. can only just can be accomplished decoding with the part check bit.
In traditional incremental redundancy HARQ (mixing automatic repeat requests) retransmission mechanism; When transmission block makes a mistake; Be data block (CC merges mode) or the part (IR merges mode) of error block through error of transmission again; And merge reception, thereby obtain to retransmit gain the recipient.
Summary of the invention
The technical problem that the present invention solved is to provide a kind of individual-layer data transmission method; Based on channel coding and decoding technology, layering, modulating/demodulating technology, multi-antenna technology, HARQ technology; Form by method of sending and receiving two parts; This layered transmission method and multi-antenna technology and HARQ combine, thereby improve the performance of system, improve the efficient of system.
In order to realize the problems referred to above, the invention provides a kind of individual-layer data sending method, based on channel coding technology, layering, modulation technique, multi-antenna technology, hybrid automatic repeat request technology, it may further comprise the steps:
(1) the transmission data are carried out chnnel coding, the data behind the coding are carried out layering, assign to ground floor to the crucial bit of receiving terminal being deciphered the effect of playing, other bit is assigned to the second layer;
(2) two layer data after the layering are modulated; And adopting when many antennas more reliably mode to send earlier to the ground floor data after the modulation, the second layer data after whether the decoding information that receives according to receiving terminal is again selected will modulate adopt high efficiency mode to send when many antennas.
Method of the present invention, wherein, step (1) further comprises: said crucial bit comprises: the crucial bit to Turbo code is systematic bits or systematic bits and part check bit; The high bit of check-node number of times in the sparse matrix to the crucial bit of LDPC sign indicating number during for coding, wherein, said check-node number of times is 3 times at least.
Said method; Wherein, The said a kind of layered approach of step (1) is that systematic bits and the check bit of data behind the coding carried out layering, layered mode be to all systematic bits in the data after encoding as ground floor, all verification check bits as the second layer;
Wherein, The said a kind of layered approach of step (1) is that the systematic bits and the check bit of data behind the coding carried out layering; Layered mode is as ground floor, remaining all check bits as the second layer to all systematic bits and part check bit in the data behind the coding.
Method of the present invention, wherein, step (2) is said modulates two layer data after the layering, and comprising: two layer data to after the layering are carried out separate modulation, perhaps two layer data after the layering are carried out hybrid modulation;
The principle of said modulation is that the ground floor data after the modulation can more correctly be received at receiving terminal reliably;
Wherein, the more reliable mode of the said employing of step (2) is a diversity mode; The high efficiency mode of said employing is a multiplex mode.
In order to realize the problems referred to above; The present invention also provides a kind of individual-layer data method of reseptance; Based on channel decoding technology, detection, demodulation techniques, multi-antenna technology, hybrid automatic repeat request technology; This method comprises: carry out channel estimating, detection, demodulation, many antenna processing, it further comprises following channel decoding step:
(1) the ground floor data that receive is deciphered, and this decoding is judged if incorrect then indicate transmitting terminal to send second layer data, and receive said second layer data;
(2) data that receive are combined to mix automatic repeat requests folding and carry out channel decoding.
In order to realize the problems referred to above, the present invention also provides a kind of individual-layer data sending method, and based on channel coding technology, layering, modulation technique, multi-antenna technology, hybrid automatic repeat request technology, it may further comprise the steps:
(1) the transmission data are carried out chnnel coding, the data behind the coding are carried out layering, assign to ground floor to the crucial bit of receiving terminal being deciphered the effect of playing, other bit is assigned to the second layer;
(2) two layer data after the layering are modulated, and adopt when many antennas more reliably mode to send earlier, send the second layer data after will modulating again adopt high efficiency mode when many antennas after the ground floor data after the modulation.
Method of the present invention, wherein, step (1) further comprises: said crucial bit comprises: the crucial bit to Turbo code is systematic bits or systematic bits and part check bit; The high bit of check-node number of times in the sparse matrix to the crucial bit of LDPC sign indicating number during for coding, wherein, said check-node number of times is 3 times at least;
Said method; Wherein, The said a kind of layered approach of step (1) is that systematic bits and the check bit of data behind the coding carried out layering, layered mode be to all systematic bits in the data after encoding as ground floor, all verification check bits as the second layer;
Wherein, The said a kind of layered approach of step (1) is that the systematic bits and the check bit of data behind the coding carried out layering; Layered mode is as ground floor, remaining all check bits as the second layer to all systematic bits and part check bit in the data behind the coding.
Method of the present invention, wherein, step (2) is said modulates two layer data after the layering, and comprising: two layer data to after the layering are carried out separate modulation, perhaps two layer data after the layering are carried out hybrid modulation;
The principle of said modulation is that the ground floor data after the modulation can more correctly be received at receiving terminal reliably;
Wherein, the more reliable mode of the said employing of step (2) is a diversity mode; The high efficiency mode of said employing is a multiplex mode.
In order to realize the problems referred to above; The present invention also provides a kind of individual-layer data method of reseptance; Based on channel decoding technology, detection, demodulation techniques, multi-antenna technology, hybrid automatic repeat request technology is wireless; This method comprises: carry out channel estimating, detection, demodulation, many antenna processing, it further comprises following channel decoding step:
(1) receives ground floor data and second layer data;
(2) two layer data that receive are combined to mix automatic repeat requests folding and carry out channel decoding.
Advantage of the present invention:
1, effectively channel coding and decoding, multi-antenna technology and HARQ technology combine together.
2, fully used multi-antenna technology to divide collection and multiplexing advantage.
3, receiving terminal utilizes the HARQ folding to handle the data that receive, then decoding.
4, make transfer of data efficient more and reliable.
Description of drawings
Fig. 1 is the process chart of the described a kind of individual-layer data sending method of the embodiment of the invention;
Fig. 2 is the process chart of the described a kind of individual-layer data method of reseptance of the embodiment of the invention.
Embodiment
The present invention provides a kind of individual-layer data transmission method here; Based on channel coding and decoding, modulating/demodulating, multi-antenna technology; Be made up of method of sending and receiving two parts, this layered transmission method and many days technology and HARQ combine, and can improve systematic function and throughput effectively.Below embodiment is described in detail, but not as to qualification of the present invention.
Sending method according to the invention content roughly is that data to be transmitted is carried out layering after chnnel coding, and said layering is that the size that the bit-level data after bit-level is according to coding are deciphered the effect of playing to receiving terminal is carried out layering; The principle of layering is to assign to ground floor to the bit that receiving terminal decoding is played a key effect, other as the second layer, layered mode has:
1, the coding after data in all systematic bits as ground floor, all verification check bits as the second layer;
2, all systematic bits in the data behind the coding and a small amount of check bit as ground floor, all check bits of residue as the second layer;
Data to after the layering are modulated, and can carry out separate modulation by each layer here, also can two-layer hybrid modulation, and the principle of modulation is can more correctly receive reliably at receiver end after making the data-modulated of ground floor.
Crucial bit is exactly a systematic bits for Turbo code; If systematic bits negligible amounts (when for example going up many antenna transmission and perhaps modulating when sending; When layer one deck two can not satisfy the length matching relationship), at this moment can consider to add into ground floor to a spot of check bit again.For the LDPC sign indicating number, the bit that the check-node number of times is high in the sparse matrix during coding is crucial bit.(for example, be the check-node number of times that bit definitions more than 3 is crucial bit, this number of times thresholding of 3 can own requirement oneself according to system defines here).
Principle on many antenna processing is preferentially to send the mode of the The data reliability after the ground floor modulation.For example ground floor information adopts diversity mode to send, and the second layer adopts multiplex mode to send.On the data sending order, ground floor information is sent earlier, and the second layer is redispatched.Here main because ground floor information probably just can solve correct information.
Method of reseptance according to the invention content roughly at receiving terminal except the processing of carrying out channel estimating, detection, demodulation, many antennas itself, also should adopt a kind of in the following processing mode:
If 1 under the good situation of channel quality; Can be earlier to the advanced row decoding of the emission data of ground floor; If it is correct; Just need not send the data of the second layer, if data incorrect then that send the second layer improve performance at receiving terminal to the mode that the The data HARQ III of twice transmission merges;
2, receiving terminal etc. receive Layer 2 data receive the back to two data that receive carry out HARQ merge after decoding again.So just can introduce the gain that HARQ merges.
The benefit of the method for the invention is to combine modulation system, many antennas, and HARQ is important information reliable transmission.
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is done to describe in detail further below.
As shown in Figure 1, be the process chart of described a kind of individual-layer data sending method based on chnnel coding, modulation, multi-antenna technology.
1, the coding after data in all systematic bits as ground floor, all verification check bits as the second layer;
2, all systematic bits in the data behind the coding and a small amount of check bit as ground floor, all check bits of residue as the second layer;
Step 103: the data to after the layering in the step 102 are modulated, and can carry out separate modulation by each layer here, also can two-layer hybrid modulation, and the principle of modulation is can more correctly receive reliably at receiver end after making the data-modulated of ground floor.
Step 104: the mode to below the The data after ground floor in the step 103 and the second layer modulation is launched: the principle on many antenna processing is preferentially to send the mode of the The data reliability after the ground floor modulation.
Ground floor The data diversity mode sends, and second layer The data multiplex mode sends.On the data sending order, the ground floor data are sent earlier, and second layer data are redispatched.(main here) because the ground floor data probably just can solve correct information.Can also be that two layer data after the layering are modulated, and adopt when many antennas more reliably mode to send earlier, send the second layer data after will modulating again adopt high efficiency mode when many antennas after the ground floor data after the modulation.
As shown in Figure 2, be the process chart of described a kind of individual-layer data method of reseptance based on channel decoding, demodulation, multi-antenna technology.
Step 201-203, conventional processing receiving terminal is done decoding to the data that receive before comprises and carries out channel estimating, detects, demodulation, outside the normal handling such as many antenna processing, adopt a kind of in the following processing mode again:
If 1 under the good situation of channel quality; Can be earlier to the advanced row decoding of the emission data of ground floor; If correct, as just need not to send second layer data, if data incorrect then that send the second layer; Wherein, at receiving terminal the mode that the The data HARQ III (third generation mixes automatic repeat requests) of twice transmission merges is improved performance.
2, after said receiving terminal etc. is received second layer data, to two layer data that receive carry out HARQ merge after decoding again; So just can introduce the gain that HARQ merges.
The advantage of embodiment according to the invention:
1, effectively channel coding and decoding, multi-antenna technology and HARQ technology combine together.
2, fully used multi-antenna technology to divide collection and multiplexing advantage.
3, receiving terminal utilizes the HARQ folding to handle the data that receive, then decoding.
4, make transfer of data efficient more and reliable.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (12)
1. an individual-layer data sending method based on channel coding technology, layering, modulation technique, multi-antenna technology, hybrid automatic repeat request technology, is characterized in that, may further comprise the steps:
(1) the transmission data are carried out chnnel coding, the data behind the coding are carried out layering, assign to ground floor to the crucial bit of receiving terminal being deciphered the effect of playing, other bit is assigned to the second layer;
(2) two layer data after the layering are modulated, and the ground floor data after the modulation are sent earlier when many antennas, the second layer data after whether the decoding information that receives according to receiving terminal is again selected will modulate are sent when many antennas;
Wherein, Second layer data after whether the said decoding information that receives according to receiving terminal is selected will modulate are sent when many antennas and are specially: earlier to the advanced row decoding of said ground floor data; If it is correct; Just need not send said second layer data, if incorrect then send said second layer data.
2. the method for claim 1 is characterized in that, step (1) further comprises: said crucial bit comprises: the crucial bit to Turbo code is systematic bits or systematic bits and part check bit; The high bit of check-node number of times in the sparse matrix to the crucial bit of LDPC sign indicating number during for coding, wherein, said check-node number of times is 3 times at least.
3. method as claimed in claim 2; It is characterized in that; Step (1) is said, and data behind the coding are carried out layering is that the systematic bits and the check bit of data behind the coding carried out layering; Layered mode be to the coding after data in all systematic bits as ground floor, all check bits as the second layer.
4. method as claimed in claim 2; It is characterized in that; Step (1) is said, and data behind the coding are carried out layering is that the systematic bits and the check bit of data behind the coding carried out layering; Layered mode is as ground floor, remaining all check bits as the second layer to all systematic bits and part check bit in the data behind the coding.
5. the method for claim 1 is characterized in that, step (2) is said modulates two layer data after the layering, and comprising: two layer data to after the layering are carried out separate modulation, perhaps two layer data after the layering are carried out hybrid modulation;
The principle of said modulation is that the ground floor data after the modulation can more correctly be received at receiving terminal reliably.
6. the method for claim 1 is characterized in that, the ground floor data described in the step (2) after the modulation are sent earlier when many antennas, and send mode is a diversity mode; Second layer data described in the step (2) after the modulation are sent when many antennas, and send mode is a multiplex mode.
7. individual-layer data method of reseptance; Based on channel decoding technology, detection, demodulation techniques, multi-antenna technology, hybrid automatic repeat request technology; This method comprises: carry out channel estimating, detection, demodulation, many antenna processing; It is characterized in that, further comprise following channel decoding step:
(1) the ground floor data that comprising of receiving, the crucial bit of effect was played in decoding to receiving terminal is deciphered, and this decoding is judged if incorrect then indicate transmitting terminal to send to comprise the second layer data of other bits, and receive said second layer data; If correct judgment carried out in this decoding then do not indicate transmitting terminal to send second layer data;
(2) data that receive are combined to mix automatic repeat requests folding and carry out channel decoding.
8. an individual-layer data sending method based on channel coding technology, layering, modulation technique, multi-antenna technology, hybrid automatic repeat request technology, is characterized in that, may further comprise the steps:
(1) the transmission data are carried out chnnel coding, the data behind the coding are carried out layering, assign to ground floor to the crucial bit of receiving terminal being deciphered the effect of playing, other bit is assigned to the second layer;
(2) two layer data after the layering are modulated, and the ground floor data after the modulation are sent earlier when many antennas, the second layer data after will modulating are again sent after when many antennas;
The principle of said modulation is that the ground floor data after the modulation can more correctly be received at receiving terminal reliably;
Ground floor data described in the step (2) after the modulation are sent earlier when many antennas, and send mode is a diversity mode; Second layer data described in the step (2) after the modulation are sent after when many antennas, and send mode is a multiplex mode.
9. method as claimed in claim 8 is characterized in that, step (1) further comprises: said crucial bit comprises: the crucial bit to Turbo code is systematic bits or systematic bits and part check bit; The high bit of check-node number of times in the sparse matrix to the crucial bit of LDPC sign indicating number during for coding, wherein, said check-node number of times is 3 times at least.
10. method as claimed in claim 9; It is characterized in that; Step (1) is said, and data behind the coding are carried out layering is that the systematic bits and the check bit of data behind the coding carried out layering; Layered mode be to the coding after data in all systematic bits as ground floor, all verification check bits as the second layer.
11. method as claimed in claim 9; It is characterized in that; Step (1) is said, and data behind the coding are carried out layering is that the systematic bits and the check bit of data behind the coding carried out layering; Layered mode is as ground floor, remaining all check bits as the second layer to all systematic bits and part check bit in the data behind the coding.
12. method as claimed in claim 8 is characterized in that, step (2) is said modulates two layer data after the layering, and comprising: two layer data to after the layering are carried out separate modulation, perhaps two layer data after the layering are carried out hybrid modulation.
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| CN2007101479598A CN101378296B (en) | 2007-08-27 | 2007-08-27 | Method for transmitting layered data |
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| CN2007101479598A CN101378296B (en) | 2007-08-27 | 2007-08-27 | Method for transmitting layered data |
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| CN101378296B true CN101378296B (en) | 2012-11-28 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101877630B (en) * | 2009-04-28 | 2015-06-03 | 中兴通讯股份有限公司 | Method and system for realizing hybrid automatic repeat request (HARQ) |
| CN101917261B (en) * | 2010-08-19 | 2015-10-21 | 中兴通讯股份有限公司 | The transmitting terminal that a kind of multi-antenna system uplink transmission block retransmits and method |
| WO2015109500A1 (en) * | 2014-01-23 | 2015-07-30 | 华为技术有限公司 | Data transmission method and apparatus |
| CN105812095A (en) * | 2016-03-08 | 2016-07-27 | 熊猫电子集团有限公司 | Helicopter satellite communication Turbo code encoding method |
| CN108399723A (en) * | 2018-03-29 | 2018-08-14 | 苏州天华信息科技股份有限公司 | A kind of phonetic warning system and method applied to traffic control monitor supervision platform |
| WO2019200605A1 (en) * | 2018-04-20 | 2019-10-24 | Qualcomm Incorporated | Techniques and apparatuses for signaling regarding rate splitting using first layers and second layers |
| CN111917510B (en) * | 2019-05-08 | 2023-05-09 | 中国移动通信有限公司研究院 | Data processing method, data processing indicating method, terminal and network equipment |
| CN110225482A (en) * | 2019-06-18 | 2019-09-10 | 任成智 | A kind of vehicle-mounted V2X Multimedia Mobile layered reuse transmission method and device |
| CN114665974B (en) * | 2022-02-28 | 2024-05-28 | 清华大学 | Signal modulation and demodulation method, transmitting device and receiving device |
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| CN1395387A (en) * | 2001-06-27 | 2003-02-05 | 三星电子株式会社 | Equipment and method for transmitting and receiving data in CDMA mobile communication system |
| CN1434647A (en) * | 2001-10-19 | 2003-08-06 | 三星电子株式会社 | Device and method of data retransmission and decoding in CDMA mobile communication system |
| CN1572081A (en) * | 2001-10-15 | 2005-01-26 | 西门子公司 | Transmission method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1395387A (en) * | 2001-06-27 | 2003-02-05 | 三星电子株式会社 | Equipment and method for transmitting and receiving data in CDMA mobile communication system |
| CN1572081A (en) * | 2001-10-15 | 2005-01-26 | 西门子公司 | Transmission method |
| CN1434647A (en) * | 2001-10-19 | 2003-08-06 | 三星电子株式会社 | Device and method of data retransmission and decoding in CDMA mobile communication system |
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