CN107483145B - Information processing apparatus - Google Patents
Information processing apparatus Download PDFInfo
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- CN107483145B CN107483145B CN201710474024.4A CN201710474024A CN107483145B CN 107483145 B CN107483145 B CN 107483145B CN 201710474024 A CN201710474024 A CN 201710474024A CN 107483145 B CN107483145 B CN 107483145B
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
Abstract
The present invention provides an information processing apparatus, including: the coding modulation unit is used for coding and modulating each information bit stream into a transmitting side symbol stream according to transmitting side coding modulation information and the system version information, and combining the system version information, the transmitting side coding modulation information corresponding to each information bit stream and other signaling for coding and modulating to obtain a signaling symbol stream; and a framing generation unit for framing all the transmitting side symbol streams and the signaling symbol stream and generating a baseband symbol stream. The information processing device can timely fuse the latest coding modulation technology into the existing standard without a large amount of infrastructure improvement and terminal upgrade.
Description
The present application is a divisional application of a prior art, having an application number of 201410498851.3, and an application date of 2014, 9 and 25, and is entitled "information processing method and apparatus".
Technical Field
The present invention relates to the field of digital information transmission, and more particularly, to an information processing apparatus.
Background
The code modulation and demodulation decoding technology is one of the core technologies in the communication system, and in order to meet the high-speed development requirement, the improvement speed and popularization speed of the code modulation and demodulation decoding technology should be faster and more flexible.
Many broadcast systems, such as DVB-S2, DVB-T2, DTMB, DVB-NGH, etc., all involve code modulation, demodulation and decoding techniques, for example, advanced low density parity check code (LDPC) encoding techniques are used in combination with constellation mapping and bit interleaving techniques, which can effectively improve the transmission performance of the broadcast systems.
However, the life cycle of a broadcast standard applied to a broadcast system is often 10 to 20 years, and during this period, although more advanced coding and modulation techniques have appeared, the broadcast standard cannot be timely merged into the existing broadcast standard, and the popularization of each new standard also involves a large amount of infrastructure improvement and terminal upgrade, which brings about a large amount of material and labor consumption.
Disclosure of Invention
The problem solved by the invention is that more advanced coding modulation technology can not be timely fused into the existing broadcast standard, and the popularization of the new standard also usually involves a large amount of infrastructure improvement and terminal upgrading.
To solve the above problem, an embodiment of the present invention provides an information processing method for encoding and modulating system version information and an information bit stream for transmission, the information processing method including the steps of: coding and modulating each information bit stream into a transmitting side symbol stream according to the transmitting side coding and modulating information and the system version information, and combining the system version information, the transmitting side coding and modulating information corresponding to each information bit stream and other signaling for coding and modulating to obtain a signaling symbol stream; and framing all transmit side symbol streams with the signaling symbol stream and generating a baseband symbol stream.
Optionally, the system version information and the coded modulation information of the transmitting side are mapped into each information field according to a predetermined field mapping rule, and each information field is spliced with other signaling according to a predetermined field splicing rule.
Optionally, the predetermined field mapping rule includes: mapping different system version information and transmitting side coded modulation information into field values with corresponding predetermined bit lengths according to mapping correspondence, wherein the predetermined field splicing rule comprises: and sorting and splicing field values which correspond to the system version information and the transmitting side coded modulation information and have preset bit length according to a preset sequence rule.
Optionally, the transmitting-side coded modulation information includes: code length, code rate and constellation mapping order, the field value includes: a first field value, a second field value, a third field value and a fourth field value respectively matched with the system version information, the code length, the code rate and the constellation mapping order, wherein the mapping corresponding relation comprises: corresponding to different first field values based on at least one version in the system version information; corresponding different second field values based on different code lengths; different third field values are commonly mapped out based on the code rate and the system version information; and corresponding different fourth field values based on different constellation mapping orders.
Optionally, the code modulating each information bit stream according to the transmitting side code modulation information and the system version information respectively includes the following sub-steps: according to the coded modulation information and the system version information of the transmitting side, coding an information bit stream and dividing the information bit stream into first bit stream blocks with preset sizes; interleaving each first bit stream block into a second bit stream block according to the transmitting side coded modulation information and the system version information; and mapping the second bit stream block according to a preset constellation mapping rule to obtain a transmitting side symbol stream.
The embodiment of the invention also provides an information processing method, which is used for demodulating and decoding system version information and information bit stream, and is characterized by comprising the following steps: receiving a baseband symbol stream, the baseband symbol stream being obtained by the information processing method for performing code modulation as described above; restoring a signaling, analyzing system version information and receiving side coded modulation information which corresponds to the transmitting side coded modulation information and passes through a channel from the signaling, and restoring and extracting a receiving side symbol stream which corresponds to the transmitting side symbol stream; and demodulating and decoding the receiving side symbol stream into at least one information bit stream according to the recovered receiving side coded modulation information and system version information.
Optionally, the demapping field value is split from the signaling according to a predetermined field splitting rule and a predetermined field demapping rule, so that system version information and receiving side coded modulation information are analyzed.
Optionally, the receiving side coded modulation information includes: and respectively analyzing the code length, the code rate and the constellation mapping order in the system version information and the receiving side code modulation information according to a first field value, a second field value, a third field value and a fourth field value in the split and demapped field values according to the demapping corresponding relation.
In addition, an embodiment of the present invention provides an information processing apparatus for performing code modulation on system version information and an information bit stream to transmit, including: the coding modulation unit is used for coding and modulating each information bit stream into a transmitting side symbol stream according to the transmitting side coding modulation information and the system version information, and combining the system version information, the transmitting side coding modulation information corresponding to each information bit stream and other signaling for coding and modulating to obtain a signaling symbol stream; and a framing generation unit for framing all the transmit side symbol streams with the signaling symbol stream and generating a baseband symbol stream.
In addition, the present invention provides an information processing apparatus for demodulating and decoding system version information and an information bit stream, comprising: a receiving unit configured to receive a baseband symbol stream, the baseband symbol stream being obtained by the information processing apparatus as described above; the extraction and analysis unit is used for recovering the signaling, analyzing the system version information and the receiving side coded modulation information which corresponds to the transmitting side coded modulation information and passes through the channel from the signaling, and recovering and extracting a receiving side symbol stream which corresponds to the transmitting side symbol stream; and a demodulation decoding unit for demodulating and decoding the receiving side symbol stream into at least one information bit stream according to the recovered receiving side coded modulation information and system version information.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the information processing method and the device, the signaling related to the version information is added into the transmitted information bit stream, so that a receiving end can extract and identify the corresponding version information through the signaling, and accordingly, the corresponding demodulation and decoding method is selected and determined, so that the information bit stream is demodulated and decoded, and the latest coding and modulation technology can be fused into the existing standard in time without a large amount of infrastructure improvement and terminal upgrading.
Drawings
Fig. 1 is a flowchart illustrating an information processing method for a transmitting end according to an embodiment of the present invention;
fig. 2 is a block diagram of an information processing procedure of a transmitting end in an embodiment of the present invention;
FIG. 3 is a block diagram of a code modulation process in an embodiment of the present invention;
FIG. 4 is a flowchart illustrating an information processing method for a receiving end according to an embodiment of the present invention;
FIG. 5 is a block diagram of an information processing procedure at a receiving end in an embodiment of the present invention; and
fig. 6 is a block diagram of a demodulation decoding process in an embodiment of the present invention.
Detailed Description
The inventor finds that in the prior art, more advanced coding modulation technology cannot be timely fused into the existing broadcast standard, and the popularization of the new standard also often involves a large amount of infrastructure improvement and terminal upgrading.
In view of the above problems, the inventors have studied and provided an information processing method and apparatus, in which a signaling related to version information is added to a transmitted information bit stream, so that a receiving end can extract and identify corresponding version information through the signaling, and select and determine a corresponding demodulation and decoding method according to the version information, thereby demodulating and decoding the information bit stream, and making it possible to fuse the latest encoding and modulation techniques into an existing standard in time without requiring a large amount of infrastructure modification and terminal upgrade.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment of the invention provides an information processing method for carrying out coding modulation on system version information and an information bit stream for transmission. Fig. 1 is a schematic flow chart of an information processing method for a transmitting end according to an embodiment of the present invention.
Referring to fig. 1, an information processing method for a transmitting end for code modulating system version information and an information bit stream for transmission includes the steps of:
step S11: substep S11a performs coded modulation on each information bit stream into a transmitting side symbol stream according to the transmitting side coded modulation information and the system version information, and substep S11b performs coded modulation on the system version information, the transmitting side coded modulation information corresponding to each information bit stream, and other signaling to obtain a signaling symbol stream; and
step S12: all transmit side symbol streams are framed with a signaling symbol stream and a baseband symbol stream is generated.
Specifically, in sub-step S11b, the system version information and the transmitting-side coded modulation information are mapped into each information field according to a predetermined field mapping rule, and each information field is spliced with other signaling according to a predetermined field splicing rule.
The predetermined field mapping rule includes: and mapping different system version information and transmitting side coded modulation information into field values with corresponding predetermined bit lengths according to the mapping correspondence. The predetermined field splicing rule includes: and sorting and splicing field values which correspond to the system version information and the transmitting side coded modulation information and have preset bit length according to a preset sequence rule.
Wherein the field value includes: a first field value, a second field value, a third field value and a fourth field value respectively matched with the system version information, the code length, the code rate and the constellation mapping order.
The specific matching mapping correspondence of the four field values is as follows: corresponding to different first field values based on at least one version in the system version information; corresponding different second field values based on different code lengths; different third field values are commonly mapped out based on the code rate and the system version information; and corresponding different fourth field values based on different constellation mapping orders.
Fig. 2 is a block diagram of an information processing procedure of a transmitting end in the embodiment of the present invention. The information processing method and the information processing apparatus in fig. 1 described above are explained below with reference to fig. 2.
In this embodiment, n information bit streams (1 to n) are subjected to information processing, so that on one hand, the n code modulation modules respectively code and modulate each information bit stream into a corresponding transmitting-side symbol stream (1 to n) according to corresponding transmitting-side code modulation information and system version information, and on the other hand, the signaling generation module combines the system version information, the transmitting-side code modulation information corresponding to each information bit stream, and other signaling, and obtains a signaling symbol stream through code modulation of the signaling.
Then, the framing and baseband symbol generation module frames the obtained n transmit side symbol streams and the obtained signaling symbol stream and generates a baseband symbol stream.
Fig. 3 is a block diagram of a coded modulation process in an embodiment of the invention. In this embodiment, different information bit streams can be distinguished by different reception modes, such as fixed reception program stream (a)1) And a mobile reception program stream (a)2) Receiving the program stream (a) outdoorsn) And so on.
An information bit stream a in the above-mentioned fig. 2 is processed by fig. 31The coded modulation method in (1) is specifically explained, and the information bit stream a is omitted here2To anBased on the same principle.
In fig. 2, the code modulation module 1 includes a coding module, a bit interleaving module, and a constellation mapping module, and accordingly, the code modulation process in step S11a specifically includes the following 3 steps:
step 1: according to the predetermined coding rule in the transmitting side code modulation information 1 and the system version information 1, the information bit stream a1Divided into individual blocks of the information bit stream of a predetermined size,e.g. the ith information bit stream block is [ b ]i,0，bi,1，…，bi,K-1]Where K is the length of each information bit stream block, and then encoding each information bit stream block into a first bit stream block, e.g. the ith first bit stream block is [ c ]i,0，ci,1，…，ci,N-1]Wherein N is the length of each first bit stream block, where the coded modulation mode information includes information such as code rate and code length, and the coding mode may use BCH code, LDPC code, RS code, and their concatenation, which is not limited in the present invention;
step 2: the bit interleaving module interleaves each first bit stream block [ c ] according to a predetermined bit interleaving rule in the transmitting side coded modulation information 1 and the system version information 1i,0,ci,1,…,ci,N-1]Interleaved into a second bit stream block di,0,di,1,…,di,N-1]. Can be understood as, [ d ]i,0,di,1,…,di,N-1]Is formed by exchanging [ ci,0,ci,1,…,ci,N-1]The order of the elements of (a). The coded modulation mode information comprises information such as code rate, code length, modulation order and the like; and
and step 3: the constellation mapping module maps each second bit stream block [ d ] according to a preset constellation mapping rule in the transmitting side coded modulation information 1 and the system version information 1i,0,di,1,…,di,N-1]Mapping into a transmit side symbol stream, i.e. block of coded modulation symbol stream si,0,si,1,…,si,N/L-1]Where L is the modulation order. The constellation mapping module divides each group of second bit streams into N/L subgroups according to L groups, and then maps L bits of each subgroup into a complex number, thereby obtaining [ s ] with the length of N/Li,0,si,1,…,si,N/L-1]. The coded modulation mode information includes information such as code rate and constellation mapping order.
The embodiment of the invention also provides an information processing method for demodulating and decoding the system version information and the information bit stream. Fig. 4 is a flowchart illustrating an information processing method for a receiving end according to an embodiment of the present invention.
Referring to fig. 4, the information processing method for the receiving end includes the steps of:
step S21: receiving a baseband symbol stream, which is obtained by the information processing method for the transmitting end in fig. 1;
step S22: recovering the signaling and parsing the system version information and the receiving side coded modulation information corresponding to the transmitting side coded modulation information and passing through the channel from the signaling through the sub-step S22a, and recovering and extracting a receiving side symbol stream corresponding to the transmitting side symbol stream through the sub-step S22 b; and
step S23: and demodulating and decoding the corresponding receiving side symbol stream into a corresponding information bit stream according to the restored receiving side coded modulation information and the system version information, and demodulating and decoding at least one information bit stream according to the requirement of a receiving end.
Specifically, in step S22a, the demapping field value is split from the signaling according to the predetermined field splitting rule and the predetermined field demapping rule, so that the system version information and the receiving side coded modulation information are resolved.
According to the mapping correspondence, a first field value, a second field value, a third field value and a fourth field value in the split and demapped field values are analyzed to obtain a code length, a code rate and a constellation mapping order in the system version information and the receiving side code modulation information respectively.
Fig. 5 is a block diagram of an information processing procedure at a receiving end in the embodiment of the present invention. The information processing method and the information processing apparatus for the receiving side in fig. 4 will be specifically described with reference to fig. 5.
After the receiving end performs synchronization and equalization processing on the baseband symbol stream, on one hand, each receiving side symbol stream (1 to n) which corresponds to the transmitting side symbol stream of the transmitting end and passes through the channel is extracted and obtained by combining the receiving side symbol stream extracting module with other signaling recovered and analyzed by the signaling analyzing module. On the other hand, not only the system version information but also the respective receiving-side coded modulation information (1 to n) corresponding to the respective transmitting-side coded modulation information and passing through the channel are restored and analyzed by the parsing signaling module.
And the at least one demodulation decoding module correspondingly demodulates and decodes the at least one receiving side symbol stream into at least one information bit stream according to the recovered at least one receiving side coded modulation information and the system version information. The method of demodulation and decoding at the receiving end corresponds to the method of modulation and coding at the transmitting end.
Fig. 6 is a block diagram of a demodulation decoding process in an embodiment of the present invention. Without loss of generality, the demodulation and decoding method for the information bit stream 1 in the above step S23 is specifically described with reference to fig. 6.
The de-mapping module de-maps each receiving side symbol stream block [ t ] according to the predetermined constellation de-mapping rule in the receiving side code modulation information 1 and the system version information 1i,0,ti,1,…,ti,N/L-1]I.e., the receiving side symbol stream 1 is demapped into a set of first LLR stream blocks li,0,li,1,…,li,N-1]. Wherein [ ti,0,ti,1,…,ti,N/L-1]With a transmitting side symbol stream block s of the transmitting endi,0,si,1,…,si,N/L-1]Corresponding, [ li,0,li,1,…,li,N-1]A second bit stream block [ d ] with the transmitting endi,0,di,1,…,di,N-1]And correspondingly. Wherein L is the constellation mapping order. The constellation demapping module demaps each coded modulation symbol into L LLRs that represent an estimate of whether the log-likelihood ratio is 0 or 1 for the bit at the transmitting end. The coded modulation mode information includes information such as code rate and modulation order.
The bit de-interleaving module de-interleaves each first LLR stream block [ l ] according to a predetermined bit de-interleaving rule in the receiving side code modulation information 1 and the system version information 1i,0,li,1,…,li,N-1]Deinterleave into a second LLR stream block [ m ]i,0,mi,1,…,mi,N-1]. That is, [ m ]i,0,mi,1,…,mi,N-1]By exchangingi,0,li,1,…,li,N-1]The order of the elements of (A) to (B) to obtain. The exchange method of deinterleaving corresponds to the method of bit interleaving at the transmitting end, so that [ m ] isi,0,mi,1,…,mi,N-1]With a corresponding one of the first bit stream blocks ci,0,ci,1,…,ci,N-1]The order of (a) corresponds. The coded modulation mode information includes information such as code rate, code length, modulation order and the like.
The decoding module decodes each second LLR stream block [ m ] according to the predetermined decoding rule and the system version information 1 in the receiving side code modulation information 1i,0,mi,1,…,mi,N-1]Decoding into an information bit stream blockb i,0,b i,1,…,b i,K-1]The decoded information bit stream block and an information bit stream block [ b ] of the transmitting endi,0,bi,1,…,bi,K-1]Correspondingly, so as to demodulate and decode a corresponding information bit stream a1。
The following describes the technical solution of the present invention by way of an example.
< example 1>
In the information processing system of the present embodiment, the transmitting end is set to only one information bit stream, and thus only one code modulation module is provided. Correspondingly, the receiving end only has one demodulation decoding module. In addition, the system is set to include two versions, version 1.0 and version 1.1.
The signaling generation module in fig. 2 maps the system version information and the coded modulation information of the transmitting side into corresponding information fields according to the predetermined field mapping rules shown in tables 1 to 4 below, and splices the information fields and other signaling fields together according to the predetermined field splicing rule in table 5,
and code modulates the signaling.
Table 1: field mapping rule between system version information and first field value
| First field value | Corresponding system version |
| “00010000” | 1.0 |
| “00010001” | 1.1 |
| Others | Is not defined |
Table 2: rule for field mapping between code length and second field value
Table 3: code rate, system version information and field mapping rule between third field value
| System version information | Third field value | Code rate |
| 1.0 | “0000” | 2/15 |
| 1.0 | “0001” | 3/15 |
| 1.0 | “0010” | 4/15 |
| 1.0 | “0011” | 5/15 |
| 1.0 | “0100” | 6/15 |
| 1.0 | “0101” | 7/15 |
| 1.0 | “0110” | 8/15 |
| 1.0 | “0111” | 9/15 |
| 1.0 | “1000” | 10/15 |
| 1.0 | “1001” | 11/15 |
| 1.0 | “1010” | 12/15 |
| 1.0 | “1011” | 13/15 |
| 1.0 | Others | Is not defined |
| 1.1 | “0000” | 1/12 |
| 1.1 | “0001” | 2/12 |
| 1.1 | “0010” | 3/12 |
| 1.1 | “0011” | 4/12 |
| 1.1 | “0100” | 5/12 |
| 1.1 | “0101” | 6/12 |
| 1.1 | “0110” | 7/12 |
| 1.1 | “0111” | 8/12 |
| 1.1 | “1000” | 9/12 |
| 1.1 | “1001” | 10/12 |
| 1.1 | “1010” | 11/12 |
| 1.1 | Others | Is not defined |
Table 4: field mapping rule between constellation mapping order and fourth field value
| The fourth field value | Constellation mapping order |
| “0000” | 2 |
| “0001” | 4 |
| “0010” | 6 |
| “0011” | 8 |
| “0100” | 10 |
| Others | Is not defined |
Table 5: partial predetermined field stitching rules
| Length of | Corresponding information | |
| First field value | 8 bits | System version information |
| Second field value | 1 bit | Code length |
| Third field value | 4 bits | Code rate |
| The fourth field value | 3 bits | Constellation mapping order |
In this embodiment, the system version information includes version 1.0 and version 1.1, and in fig. 2, for example, the system version adopted by the information bit stream 1 in the three information bit streams is 1.0, and the system version adopted by the other information bit streams 2 and 3 is 1.1. Specific values in the coded modulation modes of the three information bit streams are listed in table 6 below.
Table 6: coded modulation mode examples
| Example of the mode 1 | Example II | Example III | |
| System version information | 1.0 | 1.1 | 1.1 |
| Code length | 64800 | 64800 | 64800 |
| Code rate | 5/15 | 4/12 | 8/12 |
| Constellation mapping order | 4 | 4 | 2 |
The encoding module divides the information bit stream into a group of information bits according to the system version information, the code length and the code rate, and encodes the group of information bits into a group of first bit streams.
Specifically, as can be seen from table 6, when the system version information and the transmitting-side coded modulation information satisfy the pattern example, the coding module divides the input information bit stream into information bit stream blocks having a size of 21600 bits, and codes each of the information bit stream blocks into a first bit stream block having a size of 64800 using a first predetermined coding rule. The present embodiment does not specifically describe the first predetermined encoding rule.
When the system version information and the transmitting side coded modulation information satisfy the second mode, the coding module also divides the input information bit stream into information bit stream blocks with the size of 21600 bits, and codes each information bit block into a first bit stream block with the size of 64800 bits by using a second preset coding rule. The second predetermined encoding rule is different from the first predetermined encoding rule. The second predetermined encoding rule is also not described in detail in the present embodiment.
When the system version information and the transmitting side coded modulation information satisfy the third mode example, the coding module divides the input information bit stream into information bit stream blocks with the size of 43200 bits, and codes each block of information bit block into a first bit stream block with the size of 64800 by using a second preset coding rule. The second predetermined encoding rule is obviously different from the first or second predetermined encoding rule. The third predetermined encoding rule is also not described in detail in the present embodiment.
And a bit interleaving module at the transmitting end performs bit interleaving on each first bit stream block according to the system version information, the code length, the code rate and the constellation mapping order to obtain a second bit stream block, namely, the arrangement sequence of elements in the first bit stream block is changed without changing the content of the elements. The module uses different predetermined bit interleaving rules to interleave respectively under the conditions of the mode cases I, II and III, namely, the methods for changing the element sequence are different. The present embodiment does not specifically describe these three predetermined bit interleaving rules.
And the constellation mapping module at the transmitting end maps each second bit stream block into a transmitting side symbol stream according to the code length, the code rate, the constellation mapping order and the system version information to form a coded modulation symbol stream block.
As shown in table 7, when the system version information and the transmitting-side coded modulation information conform to the first mode case or the second mode case, the constellation mapping module first divides a second bit stream block having a length of 64800 into 16200 subgroups by 4 bits. The 4 bits of each group are then mapped to a complex number according to table 7, resulting in a block of coded modulation symbol stream of length 16200. For example, in the case of mode one, if a group of four bits is "1010", the constellation mapping module maps it to a10。[A0,A1,…,A15]And [ B ]0,B1,…,B15]Different. This example pairs [ A ]0,A1,…,A15]And [ B ]0,B1,…,B15]The specific numerical values of (a) are not described.
Table 7: mode example one, two constellation mapping method
| Bit group | Example of the mode 1 | Example II |
| “0000” | A0 | B0 |
| “0001” | A1 | B1 |
| “0010” | A2 | B2 |
| “0011” | A3 | B3 |
| “0100” | A4 | B4 |
| “0101” | A5 | B5 |
| “0110” | A6 | B6 |
| “0111” | A7 | B7 |
| “1000” | A8 | B8 |
| “1001” | A9 | B9 |
| “1010” | A10 | B10 |
| “1011” | A11 | B11 |
| “1100” | A12 | B12 |
| “1101” | A13 | B13 |
| “1110” | A14 | B14 |
| “1111” | A15 | B15 |
As shown in table 8, when the system version information and the transmitting-side coded modulation information conform to the third mode, the constellation mapping module first divides a second bit stream block of 64800 length into 32400 subgroups with 2 bits as a subgroup. The 2 bits of each group are then mapped into a complex number according to table 8, resulting in a block of length 32400 of the coded modulation symbol stream.
Table 8: model example three-constellation mapping method
| Bit group | Encoding modulation symbols |
| “00” | 1+1i |
| “01” | 1-1i |
| “10” | -1+1i |
| “11” | -1-1i |
And finally, the transmitting end performs framing on the signaling and the obtained transmitting side symbol stream and generates a baseband symbol.
After the receiving end is synchronized and balanced, the signaling is obtained through the signaling analysis module, the first field value, the second field value, the third field value and the fourth field value are extracted from the signaling, and system version information and receiving side coding modulation information corresponding to the transmitting side coding modulation information are analyzed according to tables 1 to 5.
Also after synchronous equalization, a receiving side symbol stream corresponding to the transmitting side symbol stream is obtained through the module for extracting the receiving side symbol stream.
And the demodulation decoding module demodulates and decodes the receiving side symbol stream into an information bit stream according to the extracted receiving side coding modulation information and the system version information.
The constellation demapping module demaps the group of coded modulation symbol streams into a group of first LLR streams according to the code length, the code rate, the constellation mapping order and the system version information. For example, when the system version information and the receiving-side coded modulation information conform to the mode case one or two, the constellation demapping module demaps each receiving-side symbol stream block having a length of 16200 into the first LLR stream block having a length of 64800 bits according to table 7. When the system version information and the receiving side coded modulation information conform to the third mode, the constellation demapping module demaps each receiving side symbol stream block of length 32400 into a first LLR stream block of length 64800 bits according to table 8. The LLRs in one first LLR stream block correspond one-to-one to the bits in one second bit stream block at the transmitting end. The present embodiment does not limit the predetermined demapping rule and the specific algorithm.
And the bit de-interleaving module de-interleaves each first LLR stream block into a second LLR stream block according to a bit de-interleaving rule according to the code length, the code rate, the constellation mapping order and the system version information.
And the decoding module decodes each group of second LLR stream blocks into a group of information bit stream blocks according to the code length, the code rate and the system version information, wherein the information bit stream blocks correspond to the group of information bit stream blocks at the transmitting end. For example, when the system version information and the reception-side coded modulation information conform to the mode case, the decoding module decodes 21600 bits by 64800 LLRs according to a first predetermined decoding rule corresponding to a first predetermined coding rule, when the system version information and the reception-side coded modulation information conform to the mode case second, the decoding module decodes 21600 bits by 64800 LLRs according to a second predetermined decoding rule corresponding to a second predetermined coding rule, and when the system version information and the reception-side coded modulation information conform to the mode case third, the decoding module decodes 43200 bits by 64800 LLRs according to a third predetermined decoding rule corresponding to a third predetermined coding rule. The present embodiment does not describe the specific method of the first, second and third predetermined decoding rules.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (8)
1. An information processing apparatus for code modulating system version information and an information bit stream for transmission, comprising:
the coding modulation unit is used for coding and modulating each information bit stream into a transmitting side symbol stream according to transmitting side coding modulation information and the system version information, and combining the system version information, the transmitting side coding modulation information corresponding to each information bit stream and other signaling for coding and modulating to obtain a signaling symbol stream; and
a framing generation unit, configured to frame all the transmitting-side symbol streams and the signaling symbol stream and generate a baseband symbol stream;
wherein the system version information is used to determine a method for demodulating and decoding the information bit stream when receiving, the baseband symbol stream includes the transmitting side symbol stream corresponding to different system version information and/or transmitting side coded modulation information, and different information bit streams correspond to different receiving modes.
2. The information processing apparatus according to claim 1, wherein:
the code modulation unit correspondingly maps the system version information and the transmitting side code modulation information into each information field according to a preset field mapping rule, and splices each information field and other signaling according to a preset field splicing rule.
3. The information processing apparatus according to claim 2, wherein:
wherein the predetermined field mapping rule comprises:
mapping different system version information and different transmitting side code modulation information into field values with corresponding predetermined bit lengths according to mapping correspondence,
the predetermined field splicing rule comprises:
and sequencing and splicing the field values which correspond to the system version information and the transmitting side coded modulation information and have the preset bit length according to a preset sequence rule.
4. The information processing apparatus according to claim 3, wherein:
wherein the transmitting side code modulation information includes: code length, code rate, and constellation mapping order,
the field value includes: a first field value, a second field value, a third field value, and a fourth field value respectively matched with the system version information, the code length, the code rate, and the constellation mapping order,
the mapping correspondence includes:
the first field value is different based on at least one version in the system version information;
the different second field value is corresponding based on the different code length;
collectively corresponding the third different field value based on the code rate and the system version information; and
and the different fourth field values are corresponding to different constellation mapping orders.
5. The information processing apparatus according to claim 1, wherein:
the code modulation unit codes the information bit stream according to the transmitting side code modulation information and the system version information and divides the information bit stream into each first bit stream block with a preset size, interleaves each first bit stream block into a second bit stream block according to the transmitting side code modulation information and the system version information, and maps the second bit stream block according to a preset constellation mapping rule to obtain the transmitting side symbol stream.
6. An information processing apparatus for demodulating and decoding system version information and an information bit stream, comprising:
a receiving unit that receives a baseband symbol stream obtained by the information processing apparatus according to claim 1;
the extraction and analysis unit is used for recovering a signaling, analyzing the system version information and receiving side coded modulation information which corresponds to the transmitting side coded modulation information and passes through a channel from the signaling, and recovering and extracting a receiving side symbol stream which corresponds to the transmitting side symbol stream; and
and a demodulation decoding unit, configured to demodulate and decode the receiving-side symbol stream into at least one information bit stream according to the analyzed receiving-side coded modulation information and the system version information.
7. The information processing apparatus according to claim 6, wherein:
the extraction and analysis unit is used for splitting a demapping field value from the signaling according to a preset field splitting rule and a preset field demapping rule, so that the system version information and the receiving side coding modulation information are analyzed.
8. The information processing apparatus according to claim 7, wherein:
wherein the receiving side coded modulation information includes: the extraction and analysis unit analyzes the code length, the code rate and the constellation mapping order in the system version information and the receiving side code modulation information respectively according to a first field value, a second field value, a third field value and a fourth field value in the field values which are split and demapped according to the demapping corresponding relation.
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