CN101997803B - Block transmission method and system for digital signal - Google Patents
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- 125000004122 cyclic group Chemical group 0.000 claims abstract description 22
- 238000007781 pre-processing Methods 0.000 claims abstract description 7
- 238000012805 post-processing Methods 0.000 claims abstract description 4
- 238000002203 pretreatment Methods 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 6
- 238000012958 reprocessing Methods 0.000 claims description 6
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- 230000007547 defect Effects 0.000 abstract 1
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- 238000010586 diagram Methods 0.000 description 8
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Abstract
The invention relates to a block transmission method and a block transmission system for a digital signal. The signal is transmitted in a super-frame mode, and the super-frame consists of a section of super-frame head and a plurality of signal frames. The method comprises the following steps of: generating a known training sequence; inserting a cyclic prefix in front of the known training sequence and multiplexing the known training sequence and the cyclic prefix thereof to obtain the super-frame head; packing data stream to be transmitted to have a length specified by each frame of a system and preprocessing to obtain a plurality of data blocks to be transmitted; inserting a guard interval suffix at the end of each data block to form signal frames to be transmitted; multiplexing the signal frames in turn and inserting the super-frame head in front of a first signal frame to obtain a super-frame signal to be transmitted; and post-processing the super-frame signal and sending the post-processed super-frame signal. The method and the system can be applied to a multi-carrier or single-carrier transmission system, can be compatible with multi-user and signal-user transmission modes, and can increase channel estimation speed, channel synchronization speed and the like, and improve system performance to overcome the defects in the prior art.
Description
Technical field
The present invention relates to field of signal transmissions, relate in particular to a kind of block transmission method and system of digital signal.
Background technology
Along with growing to the radio communication service demand of the develop rapidly of modern communication technology and people, the digital signal transmission system of transmission miscellaneous service is widely used in WLAN (wireless local area network), fixed wireless access, wire/wireless digital audio and video broadcasting transmission standard, such as European standard digital video broadcast-terrestrial (Digital Video Broadcasting-Terrestrial, DVB-T) and China Digital TV national standard (Digital Television MultimediaBroadcast, DTMB).
The greatest problem that the broadband wireless communications transmission technology faces is that single carrier or multicarrier modulation system can the occurrence frequency selectivity decline i.e. intersymbol interference (InterSymbol Interference, ISI) under multi-path channel.In transmission process for digital signal, auxiliary data can be resisted channel fading and other interference, thereby helps the receiving terminal restoring signal, although the adding of auxiliary data, reduced efficiency of transmission, but directly decision systems is eliminated the channel estimation ability of ISI and the variation of tracking dynamics of channels etc.In addition, the use of auxiliary data also should comprise: signal synchronously, channel estimating, transmission mode identification and follow the tracks of phase noise etc.
In four kinds of terrestrial DTV transmission standards that existed, United States advanced television systems committee (Advanced Television Systems Committee, ATSC) digital television standard has adopted single-carrier modulated, and European DVB-T standard and Japanese floor synthetic service digital broadcasting (Integrated Service Digital Broadcasting-Terrestrial, ISDB-T) and Chinese DTMB standard all adopted multi-carrier modulation based on OFDM (Orthogonal FrequencyDivision Multiplexing, OFDM) technology.As shown in Figure 1, the ATSC single-carrier system divides each signal frame for the concept of field with section, and 312 data segments and 1 field synchronization segments are contained in each field.Be illustrated in figure 2 as the Multi-Carriers system configuration of DVB-T, wherein adopt OFDM (the Coded Orthogonal Frequency DivisionMultiplexing of coding, COFDM) transmission, radom insertion pilot signal, mainly be divided into fixedly two kinds of pilot tones and mobile pilot tone, purpose is to transmit the parameter of transmitting terminal agreement or the characteristic of test channel by the data on the pilot tone.
Figure 3 shows that the stratification signal frame structure of time-domain synchronization OFDM modulation (Time Domain Synchronous-Orthogonal Frequency DivisionMultiplexing, TDS-OFDM) technology that Chinese DTMB digital television system adopts.Publication number is that the Chinese patent application that CN1317903A, name are called " time-domain synchronous orthogonal frequency division multiplex modulation method " discloses a kind of TDS-OFDM technology; Publication number is CN1334655A; the patent application use pseudo random sequence (Pseudo-random Noise, PN) that name is called " fill method at protection interval in the orthogonal FDM modulation system " replaces protecting among the OFDM interval and is used for time synchronized, Frequency Synchronization and channel estimating.Especially, known training sequence when the antagonism inter-block-interference plays the protection interval action, can also assist carry out synchronously, regularly recovery, carrier wave recovery, channel estimating and noise estimation etc.
In the existing system, owing to all having inserted training sequence or pilot signal in each signal frame, caused the waste of training sequence expense.Therefore, appropriate design frame structure how so that system can satisfy rational efficiency of transmission, can improve again the key problem that the adaptability that channel variation and data are recovered becomes the design system design.Existing TDS-OFDM of while system can not directly apply to multi-user's transmission means.Therefore how the design system structure makes its transmission means that both can be used for alone family, again can compatible multi-user transmission pattern one of the key technology that also is system.
Summary of the invention
The transmission method and the system that the purpose of this invention is to provide a kind of digital signal, the method and system can be applicable to multicarrier or single carrier transmitting system, can compatible multi-user and alone family transmission mode, and can improve channel estimating, synchronous etc. speed, improve systematic function, overcome the defective of prior art.
For achieving the above object, the present invention adopts following technical scheme.
One embodiment of this invention provides a kind of block transmission method of digital signal, and signal transmits in the mode of superframe in the method, and described superframe is comprised of one section superframe head and a plurality of signal frame, and the method comprising the steps of:
S1. generate known training sequence;
S2. before described known training sequence, insert Cyclic Prefix, and described known training sequence and its Cyclic Prefix multiple connection are obtained the superframe head;
The length of the every frame regulation of the system that S3. data flow waiting for transmission is packaged as is also carried out pre-treatment, obtains a plurality of data to be transmitted pieces;
S4. insert protection interval suffix at each data block end, form signal frame to be transmitted;
S5. with the in order multiple connection of described signal frame, and before first signal frame, insert described superframe head, obtain superframe signal to be transmitted;
S6. the described superframe signal of reprocessing and with its transmission.
Wherein, the generation method of Cyclic Prefix described in the step S2 is: described known training sequence is divided into L subsequence S in time domain
1, S
2..., S
L, with last L cross-talk sequence S
LCopy to this known training sequence before as Cyclic Prefix, wherein L is positive integer.
Wherein, the generation method of the interval of protection described in step S4 suffix is: described known training sequence is divided into L subsequence S in time domain
1, S
2..., S
L, then the protection interval suffix of i signal frame is mod (i-1, L)+1 section time domain subsequence in the described known training sequence, and wherein, mod () is modulo operation, and 1≤i≤K, K are the number of the signal frame that comprises in the superframe, and K is positive integer.
Wherein, the length of described signal frame is the integral multiple of described known training sequence length.
Wherein, the pre-treatment among the step S3 comprises Data Modulation, and modulation system comprises single-carrier modulated mode or multi-carrier modulation.
Wherein, when the method is used for the multi-user transmission pattern, comprise also behind the step S1, before the S2 that step: S1.1 is mapped to described known training sequence in the frequency band of user place; Comprise also behind the step S3, before the S4 that step: S3.1 is mapped to described data block in the frequency band of user place.
Wherein, the known training sequence that each user sends takies identical frequency domain subchannel with data block, and frequency domain subchannel shared between the different user is mutually orthogonal.
Wherein, each user can take the one or more signal frames in the superframe, and the shared signal frame of each user distributes arbitrarily.
Wherein, the modulation system of each signal frame is identical or different, and described modulation system comprises PSK, QAM, APSK, and and the combination of different channels error correction coding.
Wherein, quantity and the position of same user shared signal frame in different superframes are identical or different, and same user shared frequency domain subchannel in different superframes is identical or different.
Wherein, described known training sequence is the time domain binary sequence, or the frequency domain binary sequence, or the time-frequency sequence of real numbers, or the distortion of above-mentioned sequence or combination.
Another embodiment of the present invention also provides a kind of block transmission system of digital signal, signal transmits in the mode of superframe in this system, described superframe is comprised of one section superframe head and a plurality of signal frame, and this system comprises: the training sequence generation module is used for generating known training sequence; The first-born one-tenth module of superframe is used for inserting Cyclic Prefix before described known training sequence, and described known training sequence and its Cyclic Prefix multiple connection is obtained the superframe head; Pre-processing module is used for data flow waiting for transmission is packaged as the length of the every frame regulation of system and carries out pre-treatment, obtains the data to be transmitted piece; The signal frame generation module is used for inserting protection interval suffix at each described data block end, forms signal frame to be transmitted; Superframe signal generation module is used for the in order multiple connection of described signal frame, and inserts described superframe head before first signal frame, obtains superframe signal to be transmitted; Post-processing module is for the described superframe signal of reprocessing and with its transmission.
Wherein, when this system is used for the multi-user transmission pattern, also comprise: mapping block is used for the known training sequence of described training sequence generation module generation and the data block of pre-processing module output are mapped to respectively user place frequency band.
The block transmission method of digital signal proposed by the invention, adopt the known training sequence of compatible time domain binary sequence, frequency domain binary sequence, time-frequency sequence of real numbers or its combining form to replace Cyclic Prefix, therefore the expense that can when avoiding intersymbol interference, save pilot tone, improved the availability of frequency spectrum of system, ensure the transmitting of wireless system, therefore in multicarrier and single-carrier system, can obtain preferably performance; Signal transmits according to the hierarchical structure of superframe and signal frame, and insert according to specific rule at known training sequence and data block protection interval, and adaptive channel changes more, improves channel estimating, synchronous etc. speed, improves performance; Simultaneously, data block can be on the different subcarrier in frequency domain of multi-carrier modulation or the different time slot of single-carrier modulated transmit.
Description of drawings
Fig. 1 is the digital signal transmission method schematic diagram of U.S. ATSC;
Fig. 2 is the digital signal transmission method schematic diagram of European DVB-T;
Fig. 3 is the digital signal transmission method multi-frame structure schematic diagram of Chinese DTMB;
Fig. 4 is the block transmission method flow chart according to the digital signal of one embodiment of this invention;
Fig. 5 is the frame structure schematic diagram according to the block transmission method of the digital signal of one embodiment of this invention;
Fig. 6 is the block transmission system block diagram according to the digital signal of one embodiment of this invention;
Fig. 7 is the method flow diagram that is applied to the multi-user transmission pattern according to the block transmission method of the digital signal of one embodiment of this invention;
Fig. 8 is the system block diagram that is applied to the multi-user transmission pattern according to the block transmission system of the digital signal of one embodiment of this invention.
Embodiment
Block transmission method and the system of the digital signal that the present invention proposes are described as follows in conjunction with the accompanying drawings and embodiments.
As shown in Figure 4, according to the block transmission method flow chart of the digital signal of one embodiment of this invention, signal transmits in the mode of superframe in the method, and each superframe is comprised of one section superframe head and one group of signal frame, and the method comprising the steps of:
S1. the parameter of setting according to selected training sequence form, length etc. generates known training sequence;
S2. before known training sequence, insert Cyclic Prefix, and with known training sequence and its Cyclic Prefix multiple connection, obtain the superframe head;
The length of the every frame regulation of the system that S3. data flow waiting for transmission is packaged as is also carried out pre-treatment, obtains the data to be transmitted piece;
S4. insert protection interval suffix at each data block end, form signal frame to be transmitted, protection interval suffix is to be followed successively by each signal frame generation according to frame number and the known training sequence of its signal frame that will insert in whole superframe;
S5. with in order multiple connection of signal frame, and before first signal frame, insert the superframe head, obtain superframe signal to be transmitted;
S6. reprocessing superframe signal and transmission.
Wherein, pre-treatment can comprise Data Modulation, and data modulation includes but are not limited to single-carrier modulated and multi-carrier modulation, and multi-carrier modulation adopts the inverse Fourier transform computing to carry out.
Fig. 5 is the frame structure schematic diagram according to the block transmission method of the digital signal of one embodiment of this invention; signal in the superframe is comprised of the Cyclic Prefix of specific known training sequence and this known training sequence; signal frame in the superframe comprises that data block and protection interval suffix two parts form, and protection interval suffix is a part of time domain subsequence of known training sequence.As shown in Figure 5, known training sequence is divided into L subsequence S in time domain
1, S
2..., S
L, with last L cross-talk sequence S
LCopy to this known training sequence before as Cyclic Prefix; The protection interval suffix of i signal frame is mod (i-1, L)+1 section time domain subsequence in the known training sequence, and wherein, mod () is modulo operation, and 1≤i≤K, K are the number of the signal frame that comprises in the superframe, and L, K are positive integer.
According to frame structure of the present invention, the length of the Cyclic Prefix of known training sequence is identical with the length of signal frame protection interval suffix, and this length should be more than or equal to the maximum delay expansion of channel.The length of data block is the integral multiple of known training sequence length.Known training sequence in the superframe head is used for that receiver carries out synchronously, channel estimating, channel self-adapting tracking.Receiver carries out channel estimating one time in the beginning of each superframe, and with this channel respective application all signal frames in this superframe.
According to the difference of channel time variation, the number of the signal frame that comprises in superframe can be optimized to be chosen, the performances such as channel estimating when improving experience fast time variant or deep fade channel.When channel variation when very fast, the quantity of included signal frame in the superframe can be reduced; When channel variation is slower, can suitably increase the quantity of signal frame in the superframe.
As shown in Figure 6, be the block transmission system according to the digital signal of one embodiment of this invention, signal transmits in the mode of superframe in this system, superframe is comprised of one section superframe head and a plurality of signal frame, this system comprises: training sequence generation module 100, the parameter that is used for setting according to selected training sequence form, length etc. generates the known training sequence of superframe head.The first-born one-tenth module 200 of superframe is used for inserting Cyclic Prefix before known training sequence, and with known training sequence and its Cyclic Prefix multiple connection, obtains the superframe head.Pre-processing module 300, be used for data flow waiting for transmission is packaged as the length of the every frame regulation of system and carries out pre-treatment, obtain the data to be transmitted piece, this module comprises data modulator 301, is used for data to be transmitted is carried out the Data Modulation of the modulation systems such as single carrier or multicarrier.Signal frame generation module 400, be used at each insertion protection interval, data block end suffix, form signal frame to be transmitted, this module comprises protection interval suffix maker 401, be used for according to its signal frame that will insert in the known training sequence that frame number and the training sequence generation module 100 of whole superframe generates, be followed successively by each signal frame and produce and protect interval suffix; Signal frame multiplexer 402 is used for multiple connection is carried out at the protection interval of data block and suffix maker 401 generations of protection interval, obtains signal frame.Superframe signal generation module 500 is used in order multiple connection of signal frame, and inserts the superframe head that the first-born one-tenth module 200 of superframe generates before first signal frame, obtains superframe signal to be transmitted.Post-processing module 600 is used for reprocessing superframe signal and transmission.
The block transmission method of digital signal of the present invention is applicable to the transmission mode at alone family, also be applicable to multi-user's transmission mode, under the multi-user transmission pattern, the alone family situation of comparing, the frequency band that each user need to distribute according to this user oneself, data block and known training sequence are mapped to this user place frequency band, afterwards with alone family situation similar be multiplexed to signal frame and superframe, as shown in Figure 7, when the method is used for the multi-user transmission pattern, compare method shown in Figure 5, comprise also before the S2 behind the step S1 that step: S1.1 is mapped to known training sequence in the frequency band of user place; Comprise also before the S4 behind the step S3 that step: S3.1 is mapped to data block in the frequency band of user place.
When the block transmission method of digital signal of the present invention was used for the multi-user transmission pattern, the known training sequence that each user sends took identical frequency domain subchannel with data block, and frequency domain subchannel shared between the different user is mutually orthogonal; Each user can take the one or more signal frames in the superframe, and the shared signal frame of each user distributes arbitrarily; When the block transmission method of digital signal of the present invention was used for the multi-user transmission pattern, the modulation system of each signal frame was identical or different, modulation system comprise PSK, QAM, APSK, and and the combination of different channels error correction coding, but be not limited to aforesaid way; Quantity and the position of same user shared signal frame in different superframes can be identical or different, and shared frequency domain subchannel can be identical or different in different superframes for same user.
As shown in Figure 8, when being applied to multi-user transmission pattern lower time, comparing system shown in Figure 6 according to the block transmission system of the digital signal of one embodiment of this invention also comprises: mapping block, this module comprises the first map unit 701 and the second map unit 702, is used for separately the known training sequence of training sequence generation module 100 generations and the data block of pre-processing module output 300 are mapped to respectively user place frequency band.
In the present invention, known training sequence is the time domain binary sequence, or the frequency domain binary sequence, or the time-frequency sequence of real numbers, or the distortion of above-mentioned sequence or combining form, but is not limited only to the above-mentioned sequence form of mentioning.
Above execution mode only is used for explanation the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; in the situation that do not break away from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (13)
1. the block transmission method of a digital signal is characterized in that, signal transmits in the mode of superframe in the method, and described superframe is comprised of one section superframe head and a plurality of signal frame, and the method comprising the steps of:
S1. generate known training sequence;
S2. before described known training sequence, insert Cyclic Prefix, and described known training sequence and its Cyclic Prefix multiple connection are obtained the superframe head;
The length of the every frame regulation of the system that S3. data flow waiting for transmission is packaged as is also carried out pre-treatment, obtains a plurality of data to be transmitted pieces;
S4. insert protection interval suffix at each data block end, form signal frame to be transmitted;
S5. with the in order multiple connection of described signal frame, and before first signal frame, insert described superframe head, obtain superframe signal to be transmitted;
S6. the described superframe signal of reprocessing and with its transmission.
2. the block transmission method of digital signal as claimed in claim 1 is characterized in that, the generation method of Cyclic Prefix described in the step S2 is: described known training sequence is divided into L subsequence S in time domain
1, S
2..., S
L, with last L cross-talk sequence S
LCopy to this known training sequence before as Cyclic Prefix, wherein L is positive integer.
3. the block transmission method of digital signal as claimed in claim 1 is characterized in that, the generation method of the interval of protection described in step S4 suffix is: described known training sequence is divided into L subsequence S in time domain
1, S
2..., S
L, then the protection interval suffix of i signal frame is mod (i-1, L)+1 section time domain subsequence in the described known training sequence, and wherein, mod () is modulo operation, and 1≤i≤K, K are the number of the signal frame that comprises in the superframe, and K is positive integer.
4. the block transmission method of digital signal as claimed in claim 1 is characterized in that, the length of described signal frame is the integral multiple of described known training sequence length.
5. the block transmission method of digital signal as claimed in claim 1 is characterized in that, the pre-treatment among the step S3 comprises Data Modulation, and modulation system comprises single-carrier modulated mode or multi-carrier modulation.
6. the block transmission method of digital signal as claimed in claim 1 is characterized in that, when the method is used for the multi-user transmission pattern,
Also comprise step behind the step S1, before the S2:
S1.1 is mapped to described known training sequence in the frequency band of user place;
Also comprise step behind the step S3, before the S4:
S3.1 is mapped to described data block in the frequency band of user place.
7. the block transmission method of digital signal as claimed in claim 6 is characterized in that, the known training sequence that each user sends takies identical frequency domain subchannel with data block, and frequency domain subchannel shared between the different user is mutually orthogonal.
8. the block transmission method of digital signal as claimed in claim 6 is characterized in that, each user can take the one or more signal frames in the superframe, and the shared signal frame of each user distributes arbitrarily.
9. the block transmission method of digital signal as claimed in claim 6 is characterized in that, the modulation system of each signal frame is identical or different, and described modulation system comprises PSK, QAM or APSK.
10. the block transmission method of digital signal as claimed in claim 6 is characterized in that, quantity and the position of same user shared signal frame in different superframes are identical or different, and same user shared frequency domain subchannel in different superframes is identical or different.
11. the block transmission method such as each described digital signal of claim 1-10 is characterized in that, described known training sequence is the time domain binary sequence, or the frequency domain binary sequence, or the time-frequency sequence of real numbers, or the distortion of above-mentioned sequence or combination.
12. the block transmission system of a digital signal is characterized in that, signal transmits in the mode of superframe in this system, and described superframe is comprised of one section superframe head and a plurality of signal frame, and this system comprises:
The training sequence generation module is used for generating known training sequence;
The first-born one-tenth module of superframe is used for inserting Cyclic Prefix before described known training sequence, and described known training sequence and its Cyclic Prefix multiple connection is obtained the superframe head;
Pre-processing module is used for data flow waiting for transmission is packaged as the length of the every frame regulation of system and carries out pre-treatment, obtains the data to be transmitted piece;
The signal frame generation module is used for inserting protection interval suffix at each described data block end, forms signal frame to be transmitted;
Superframe signal generation module is used for the in order multiple connection of described signal frame, and inserts described superframe head before first signal frame, obtains superframe signal to be transmitted;
Post-processing module is for the described superframe signal of reprocessing and with its transmission.
13. the block transmission system of digital signal as claimed in claim 12, it is characterized in that, when this system is used for the multi-user transmission pattern, also comprise: mapping block is used for the known training sequence of described training sequence generation module generation and the data block of pre-processing module output are mapped to respectively user place frequency band.
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| CN102769509B (en) | 2012-06-07 | 2015-10-21 | 华为技术有限公司 | A kind of sending method of physical layer signal, Apparatus and system |
| EP2782280A1 (en) * | 2013-03-20 | 2014-09-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Two-stage signaling for transmission of a datastream |
| CN103856422B (en) * | 2014-03-17 | 2017-10-17 | 清华大学 | A kind of method and apparatus of the transmission signal configuration and channel estimation of multicarrier Large Scale mimo systems |
| CN104580057B (en) * | 2014-12-30 | 2018-08-28 | 江苏中兴微通信息科技有限公司 | A kind of time domain pilot and its synchronous method of single carrier MIMO system |
| CN105553619B (en) * | 2015-12-24 | 2018-10-12 | 成都国恒空间技术工程有限公司 | Burst signal detection method based on Modulation Identification auxiliary |
| CN111106911B (en) * | 2018-10-29 | 2023-03-28 | 华为技术有限公司 | Communication method and device |
| WO2021165733A1 (en) * | 2020-02-18 | 2021-08-26 | Zeku Inc. | Smooth transition for data streams with adjusted gain |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1332556A (en) * | 2001-04-27 | 2002-01-23 | 清华大学 | Channel transmission method for ground digital multimeldia television broadcast system |
| CN1913396A (en) * | 2006-09-12 | 2007-02-14 | 北京邮电大学 | Single/multiple carrier compatible digital broadcast system communication method |
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| CN1332556A (en) * | 2001-04-27 | 2002-01-23 | 清华大学 | Channel transmission method for ground digital multimeldia television broadcast system |
| CN1913396A (en) * | 2006-09-12 | 2007-02-14 | 北京邮电大学 | Single/multiple carrier compatible digital broadcast system communication method |
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