CN106656415B - A kind of super frame of data production method of adaptive transmission channel - Google Patents
A kind of super frame of data production method of adaptive transmission channel Download PDFInfo
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- CN106656415B CN106656415B CN201610859231.7A CN201610859231A CN106656415B CN 106656415 B CN106656415 B CN 106656415B CN 201610859231 A CN201610859231 A CN 201610859231A CN 106656415 B CN106656415 B CN 106656415B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- Time-Division Multiplex Systems (AREA)
Abstract
The invention discloses a kind of super frame of data production methods of adaptive transmission channel, are particularly suitable for the actual demodulation application of the adaptive transmission channel of rate-compatible frame by frame.This method by stored in current signaling frame each information frame of next super frame of data pattern information and model identical information frame corresponding to state pause judgments frame number and when carriers rate changes, the frame head of next carriers rate and the scheme of information frame are added after current carrier rate corresponding information frame framing, the real-time accurate demodulation coding of the adaptive transmission channel of rate-compatible frame by frame may be implemented.
Description
Technical field
The present invention relates to a kind of super frame of data structure production methods of adaptive transmission channel, especially suitable for using frame by frame
The modulation demodulation system practical application of the adaptive coding modulation of rate-compatible.
Background technique
In using the link of the adaptive coding modulation of rate-compatible frame by frame, the mould for the load data for needing to send
Formula information (rate, coding mode and modulation system) is different according to link requirements.And existing data frame structure is wanted
Ask load to keep absolutely consistent in rate, and frame length is immutable, when in channel rate of loading and frame length change when,
It will lead to the serious mistake that modulation end data is sent, directly affect the reception of load information.Therefore how correct combined information frame
Rate and the continually changing data flow of frame length are completed accurately modulation and are sent, be a critical issue urgently to be solved.
Summary of the invention
To solve the prior art existing deficiency, this hair when using the adaptive coding modulation of rate-compatible frame by frame
It is bright to provide a kind of completely new modulation data superframe generation method, signaling frame is intelligently formed according to signaling information, further according to signaling
Frame requires to calculate and convert the rate and frame length of each information frame, and intelligence forms adaptive superframe structure.
The object of the present invention is achieved like this, a kind of super frame of data production method of adaptive transmission channel, including with
Lower step:
(1) starting of current data superframe is inserted into current frame head；The super frame of data includes multiple information frames；
(2) pattern information and model identical information of each information frame of next super frame of data are stored in current signaling frame
State pause judgments frame number corresponding to frame；The pattern information includes carriers rate and the coded modulation side of all information frames
Formula；
(3) frame length of information frame and information speed in next super frame of data are determined according to the pattern information in current signaling frame
Rate；
(4) neighbor information frame in current data superframe is judged according to the pattern information in the signaling frame of a upper super frame of data
Whether carriers rate changes, and when carriers rate changes, finishes in the corresponding information frame framing of current carrier rate
The frame head and information frame of next carriers rate are added afterwards；
The generation of super frame of data structure is completed, so as to the realization of the adaptive demodulation of rate-compatible frame by frame.
It wherein, further include being inserted into the current frame head after insertion super frame of data starting between step (1) and step (2)
For carrying out the auxiliary information of offset estimation.
Wherein, the length of frame head is determined according to signal-to-noise ratio.
Compared with the background technology, the present invention, it has the advantages that
(1) intelligence composition signaling frame, load framing thereafter are believed according to the pattern information adaptive change that signaling frame provides
Cease frame frame length and rate；
(2) when information frame carriers rate changes, the addition mark frame head before changing frame, for demodulating end in signaling
Discriminatory carrier rate variation before frame does not parse.
(3) in order to realize the carrier auxiliary of high order modulation, in signaling frame and each information frame head and the tail addition priori pilot tone
Information can be realized simultaneously the carrier auxiliary of all modulation systems using pilot tone.
Detailed description of the invention
Fig. 1 is super frame of data structural schematic diagram of the present invention.
Specific embodiment
The invention will now be described in further detail with reference to the accompanying drawings.
Present invention employs a kind of completely new super frame of data structures to realize information frame rate and the continually changing number of frame length
According to the combination of stream: first in signaling frame in intelligent storage super frame of data each frame information frame pattern information, then according to frame
Pattern information intelligence framing.If carriers rate changes, corresponding frame originating point information is added before changing frame；If mode
Only rate of loading changes information alert, then selects corresponding clock；It directly will grow longer if only frame length changes
Superframe is added in frame.
A kind of super frame of data production method of adaptive transmission channel, comprising the following steps:
(1) it after being inserted into the starting of current data superframe in current frame head, is inserted into the auxiliary for carrying out offset estimation and believes
Breath；The super frame of data includes multiple information frames；
Super frame of data structure includes the frame head for demodulating end frame-grab first, it is intended that one super frame of data of label rises
Begin and aid demodulation end carries out offset estimation；
The length of frame head will design rationally, it is desirable that receiving end do not complete clock recovery before and system requirements signal-to-noise ratio item
Under part, frame head and other data flows can be correctly differentiated, and can assist carrying out offset estimation.(2) it is stored in current signaling frame
State pause judgments frame number corresponding to the pattern information and model identical information frame of each information frame of next super frame of data；It is described
Pattern information include all information frames carriers rate and code modulation mode；
Signaling frame after frame head frame, for store next super frame of data each information frame pattern information (carrier wave speed
Rate and code modulation mode)；
The storage of signaling frame pattern information is numbered according to information frame, records start frame and the end of same pattern information frame
Frame number, if pattern information changes, the start frame and end frame number of the information frame after re-recording variation.Various pattern information institutes
The frame number possessed can change at random according to adaptive system, can lack a certain or various modes, can also entirely data surpass
Frame only has a certain mode, and super frame of data structure is more flexible and changeable.
For the first time when framing, what the signaling frame of current data superframe storage was directed toward is the mode of each information frame of next super frame of data
Information；The information frame of first superframe is without practical significance, mainly since demodulating end signal demodulation decodes and the needs of parsing.
(3) frame length of information frame and information speed in next super frame of data are determined according to the pattern information in current signaling frame
Rate；
If different codings and modulation system embody the information rate of information frame in the case where carriers rate is constant
With the difference of frame length.
(4) neighbor information frame in current data superframe is judged according to the pattern information in the signaling frame of a upper super frame of data
Whether carriers rate changes, and when carriers rate changes, finishes in the corresponding information frame framing of current carrier rate
The frame head and information frame of next carriers rate are added afterwards；
If pattern information prompt carriers rate changes, needs to reinsert the frame head of the rate, be used for demodulating end
Label bit-rate changes before no parsing signaling information frame；
Although each information frame of next super frame of data after the demodulation coding of current data superframe completion signaling frame and parsing
Pattern information is it has been shown that still need just to calculate the exact time of carriers rate variation before matched filtering, this is in clock
Not restore to be uncertain before, this uncertainty causes the received fault of load data nearby of carriers rate variation interface,
And can also there be hangover fault after modulated terminal forming.Therefore best solution is exactly the information frame in carriers rate variation
Preceding addition frame head, just identifies carriers rate changing frame before clock recovery, when buffering rate changes modulated terminal and demodulating end at
The loss of delay caused by type and matched filtering and hangover fault, while the transmission of signaling frame pattern information can be further verified again
Accuracy.
Obtain super frame of data.The carriers rate of neighbor information frame occurs specific structure in current data superframe as shown in Figure 1:
Variation, is denoted as carriers rate 1 and carriers rate 2, and the first frame of super frame of data includes frame head, signaling frame and n information frame, and second
Frame includes frame head and m information frame.
Claims (3)
1. a kind of super frame of data production method of adaptive transmission channel, which comprises the following steps:
(1) starting of current data superframe is inserted into current frame head；The super frame of data includes multiple information frames；
(2) pattern information and the model identical information frame institute of each information frame of next super frame of data are stored in current signaling frame
Corresponding state pause judgments frame number；The pattern information includes the carriers rate and code modulation mode of all information frames；
(3) frame length and information rate of information frame in next super frame of data are determined according to the pattern information in current signaling frame；
(4) carrier wave of neighbor information frame in current data superframe is judged according to the pattern information in the signaling frame of a upper super frame of data
Whether rate changes, and when carriers rate changes, adds after current carrier rate corresponding information frame framing
Add the frame head and information frame of next carriers rate；
Obtain super frame of data.
2. a kind of super frame of data production method of adaptive transmission channel according to claim 1, it is characterised in that: step
It (1) further include being inserted into the current frame head after insertion super frame of data starting for carrying out offset estimation between step (2)
Auxiliary information.
3. a kind of super frame of data production method of adaptive transmission channel according to claim 1 or 2, it is characterised in that:
The length of frame head is determined according to signal-to-noise ratio.
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| CN110401510B (en) * | 2019-07-23 | 2021-08-31 | 中国电子科技集团公司第五十四研究所 | Demodulator suitable for carrier rate and modulation coding mode variable frame by frame |
| CN117397188A (en) * | 2021-06-08 | 2024-01-12 | 华为技术有限公司 | Communication method and communication device |
| CN113746600B (en) * | 2021-08-25 | 2022-08-02 | 中国电子科技集团公司第五十四研究所 | Multi-rate self-adaptive transmitting device based on burst frame type real-time updating |
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| CN101997802A (en) * | 2009-08-19 | 2011-03-30 | 清华大学 | Transmission method of digital signal |
| CN104618058A (en) * | 2015-01-09 | 2015-05-13 | 中国电子科技集团公司第五十四研究所 | LDPC (Low Density Parity Check) coding based variable medium rate frame-by-frame modulator |
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|---|---|---|---|---|
| CN101997802A (en) * | 2009-08-19 | 2011-03-30 | 清华大学 | Transmission method of digital signal |
| CN104618058A (en) * | 2015-01-09 | 2015-05-13 | 中国电子科技集团公司第五十四研究所 | LDPC (Low Density Parity Check) coding based variable medium rate frame-by-frame modulator |
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| "自适应编码调制技术在卫星通信中的应用";雷花;《中国优秀硕士学位论文全文数据库 信息科技辑》;20160815;I136-522 |
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