CN101807969A - Method for realizing GSM wireless channel coding in wireless communication system - Google Patents
Method for realizing GSM wireless channel coding in wireless communication system Download PDFInfo
- Publication number
- CN101807969A CN101807969A CN200910046162A CN200910046162A CN101807969A CN 101807969 A CN101807969 A CN 101807969A CN 200910046162 A CN200910046162 A CN 200910046162A CN 200910046162 A CN200910046162 A CN 200910046162A CN 101807969 A CN101807969 A CN 101807969A
- Authority
- CN
- China
- Prior art keywords
- coding
- data
- communication system
- gsm
- wireless communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004891 communication Methods 0.000 title claims abstract description 23
- 230000008707 rearrangement Effects 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 238000010295 mobile communication Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a method for realizing GSM wireless channel coding in a wireless communication system, comprising the following steps: the system carries out cycle coding on the input data and increases the tail bits; the system stores the data into a storage module; and the system reads the data after cycle coding from the storage module and carries out subsequent channel coding with bit as the unit. By adopting the method of the invention, the intermediate results generated by cycle coding but not the intermediate results generated in the processes of convolutional coding, perforating and interlacing and rearranging only need to be stored, thereby remarkably reducing consumption of the storage space of the system, greatly lowering the requirement for the size of the processing chip RAM, narrowing the area of the chip, saving the manufacturing cost of the chip and simultaneously lowering the cost and overhead of GSM channel coding. In addition, the invention is simple and convenient in realization process, stable and reliable in working performance and wider in application range and lays a solid foundation for further development of the wireless channel coding technology.
Description
Technical field
The present invention relates to wireless communication field, particularly wireless channel coding techniques field specifically is meant the method that realizes the gsm wireless chnnel coding in a kind of wireless communication system.
Background technology
GSM (global system for mobile communications, Global System for Mobile communications) is the most widely used digital mobile communication system in a kind of present whole world.
Chnnel coding is the unnecessary code element (being called supervise code element) that increases some in information code, makes them satisfy certain restriction relation, like this, forms a code word by Channel Transmission jointly by information code element and supervise code element.In case because the interference of physical medium and the error of transmission that can't avoid noise to cause, the restriction relation between information code element and supervise code element is with destroyed.At receiving terminal according to set this restriction relation of regular verification, thereby reach the purpose of finding and correcting a mistake.
The effect of chnnel coding is as follows:
(1) makes the spectral characteristic of code stream adapt to the spectral characteristic of passage, thereby make energy loss minimum in the transmission course, improve the ratio of signal energy and noise energy, reduce to take place the possibility of mistake;
(2) increase error correcting capability, also can obtain correcting even if make to go wrong.
Chnnel coding commonly used in the mobile communication has: parity check code; Duplication code; Cyclic redundancy check (CRC) code; Convolution code; Interweave etc.
See also shown in Figure 1ly, in the prior art, the GSM chnnel coding can be divided into four-stage substantially: loop coding, convolutional encoding, interweave and reset and be mapped to burst sequences.Be several coded systems in the chnnel coding to be used as standalone module handle and carry out convolutional encoding again after the data of i.e. coding input are all finished loop coding to the general practice of chnnel coding in the existing GSM baseband chip, be the rearrangement that interweaves then, be mapped in the burst sequences at last.Data are descended a kind of coding after always all finishing a kind of coding again.The data that the data of coding input will specifically be carried out earlier after loop coding also will be encoded deposit among the RAM, and the data of coding input are by the time all finished the data of reading again behind loop coding behind the loop coding and carried out convolutional encoding from RAM.The result that convolutional encoding produces also deposits in and is used as the input that interweaves and reset among the RAM.The result that the rearrangement that interweaves equally produces also must deposit in and be used as the input that is mapped to the burst sequences module among the RAM.We need a bigger internal RAM to preserve the intermediate object program that every kind of coding produces like this, and big RAM must bring big chip area, and area of chip is directly proportional with chip cost, and big RAM also just is accompanied by higher chip cost.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, the method that provide that a kind of consumption of effective minimizing system memory space, the cost that reduces the GSM chnnel coding and expense, implementation procedure are simple and convenient, stable and reliable working performance, the scope of application realizes the gsm wireless chnnel coding comparatively widely in the wireless communication system.
In order to realize above-mentioned purpose, realize in the wireless communication system of the present invention that the method for gsm wireless chnnel coding is as follows:
Realize the method for gsm wireless chnnel coding in this wireless communication system, its main feature is that described method may further comprise the steps:
(1) system carries out loop coding for the input data of needs coding, and increases tail bit (Tail Bits);
(2) data of system after with loop coding deposit in the memory module;
(3) system reads the data behind this loop coding from memory module, and bitwise carries out the subsequent communication channel encoding process.
Subsequent communication channel encoding process in this wireless communication system in the method for realization gsm wireless chnnel coding may further comprise the steps:
(11) bitwise the data behind this loop coding are carried out convolutional encoding;
(12) data after the convolutional encoding are bored a hole;
(13) to the data rearrangement that interweaves after the perforation;
(14) will interweave data map after resetting in burst sequences.
Memory module in this wireless communication system in the method for realization gsm wireless chnnel coding is the RAM memory.
Adopted the method that realizes the gsm wireless chnnel coding in the wireless communication system of this invention, because it has broken the pattern of traditional GSM channel coding moduleization, descend a kind of coding again after need not by the time all to finish a kind of coding for the input data of needs codings, then adopt with bit (Bit) is unit, carry out the coding of next Bit data after being mapped to the coded input data of each Bit in the burst sequences more always, thereby only need to preserve the intermediate object program that loop coding produces, and need not preserve convolutional encoding, perforation, the intermediate object program that is produced in the rearrangement process that interweaves, thereby significantly reduced the consumption of system memory space, reduced requirement significantly to the size of process chip RAM, reduced area of chip, saved the manufacturing cost of chip, the cost and the expense of GSM chnnel coding have been reduced simultaneously, and implementation procedure is simple and convenient, stable and reliable working performance, the scope of application is comparatively extensive, for further developing of wireless channel coding techniques established solid foundation.
Description of drawings
Fig. 1 is a gsm wireless chnnel coding structural representation of the prior art.
Fig. 2 flows to schematic diagram for gsm wireless channel-encoded bit in the method that realizes the gsm wireless chnnel coding in the wireless communication system of the present invention.
Fig. 3 is a structural representation of realizing SACCH chnnel coding in the method for gsm wireless chnnel coding in the wireless communication system of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples.
See also shown in Figure 2ly, realize the method for gsm wireless chnnel coding in this wireless communication system, comprising following steps:
(1) system carries out loop coding for the input data of needs coding, and increases tail bit (Tail Bits);
(2) data of system after with loop coding deposit in the memory module, and this memory module is the RAM memory;
(3) system reads the data behind this loop coding from memory module, and bitwise carries out the subsequent communication channel encoding process, may further comprise the steps:
(a) bitwise the data behind this loop coding are carried out convolutional encoding;
(b) data after the convolutional encoding are bored a hole;
(c) to the data rearrangement that interweaves after the perforation;
(d) will interweave data map after resetting in burst sequences.
In the middle of reality was used, basic realization of the present invention was exactly a mentality of designing of having broken traditional GSM channel coding moduleization, was the mentality of designing of unit and adopt with Bit.The data of coding input are descended a kind of coding after need not waiting until and all finishing a kind of coding again, but carry out the coding of next Bit after adopting the coded input data of each Bit to be mapped in the burst sequences more always.
Concrete implementation is as follows:
Step 1---coded input data is carried out loop coding, deposit among the RAM behind the encoding operations such as increase Tail Bits;
Step 2---reading the data behind the loop coding from RAM, is that unit carries out convolution with Bit, perforation, and interweaving is mapped in the burst sequences at last.
The maximum benefit of employing said method is exactly only to need to preserve the intermediate object program that step 1 produces, and need not preserve the intermediate object program of convolution in the step 2, perforation, interleaving block generation.
Use as a typical case of the present invention, the type of the chnnel coding that SACCH (Slow Associated Control Channel, i.e. slow associated control channel) is required and every kind of bit number that coding produces see also shown in Figure 3.
If according to modularization coding method of the prior art, then need the chnnel coding of SACCH is divided into: loop coding, convolutional encoding, interweave and reset and be mapped to four modules of burst sequences.The required RAM memory space of result of preserving loop coding is 228Bit, and convolutional encoding needs 456Bit, and interweaving with resetting needs 456Bit, and being mapped to burst sequences needs 628Bit (4 * 157).If consider to preserve the SACCH coded input data, the required RAM memory space of chnnel coding of finishing SACCH data is 1952Bit.
And if adopt method of the present invention, be that unit encodes one by one according to Bit, then only need be divided into two stages to the chnnel coding of SACCH: loop coding, other coding.
Only need to preserve the input data of the 228Bit of loop coding generation this moment as other coding.And begin with Bit to be that unit carries out the convolution deepening, the rearrangement of boring a hole, interweave, be mapped to burst sequences at last from convolutional encoding.Because each time slot of GSM only can be used one of them burst sequences, therefore only need to preserve the required burst sequences of current time slots, and abandon the data of other burst sequences.(data of other burst sequences chnnel coding that can try again in pairing time slot produces.)
Like this, the size of finishing the required RAM of the chnnel coding of SACCH is 184+228+156.25Bit, is about 569Bit, only is 29% of above modularization coding method of the prior art.From top data analysis, can see clearly that adopting method of the present invention is advantage on the chip cost in the internal RAM storage size.
Adopted the method that realizes the gsm wireless chnnel coding in the above-mentioned wireless communication system, because it has broken the pattern of traditional GSM channel coding moduleization, descend a kind of coding again after need not by the time all to finish a kind of coding for the input data of needs codings, then adopt with bit (Bit) is unit, carry out the coding of next Bit data after being mapped to the coded input data of each Bit in the burst sequences more always, thereby only need to preserve the intermediate object program that loop coding produces, and need not preserve convolutional encoding, perforation, the intermediate object program that is produced in the rearrangement process that interweaves, thereby significantly reduced the consumption of system memory space, reduced requirement significantly to the size of process chip RAM, reduced area of chip, saved the manufacturing cost of chip, the cost and the expense of GSM chnnel coding have been reduced simultaneously, and implementation procedure is simple and convenient, stable and reliable working performance, the scope of application are comparatively extensive, for further developing of wireless channel coding techniques established solid foundation.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (3)
1. realize the method for gsm wireless chnnel coding in the wireless communication system, it is characterized in that described method may further comprise the steps:
(1) system carries out loop coding for the input data of needs coding, and increases the tail bit;
(2) data of system after with loop coding deposit in the memory module;
(3) system reads the data behind this loop coding from memory module, and bitwise carries out the subsequent communication channel encoding process.
2. realize the method for gsm wireless chnnel coding in the wireless communication system according to claim 1, it is characterized in that described subsequent communication channel encoding process may further comprise the steps:
(11) bitwise the data behind this loop coding are carried out convolutional encoding;
(12) data after the convolutional encoding are bored a hole;
(13) to the data rearrangement that interweaves after the perforation;
(14) will interweave data map after resetting in burst sequences.
3. realize the method for gsm wireless chnnel coding in the wireless communication system according to claim 1 and 2, it is characterized in that described memory module is the RAM memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910046162A CN101807969B (en) | 2009-02-13 | 2009-02-13 | Method for realizing GSM wireless channel coding in wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910046162A CN101807969B (en) | 2009-02-13 | 2009-02-13 | Method for realizing GSM wireless channel coding in wireless communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101807969A true CN101807969A (en) | 2010-08-18 |
| CN101807969B CN101807969B (en) | 2012-09-19 |
Family
ID=42609597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910046162A Active CN101807969B (en) | 2009-02-13 | 2009-02-13 | Method for realizing GSM wireless channel coding in wireless communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101807969B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7240270B2 (en) * | 2001-04-30 | 2007-07-03 | Nokia Corporation | Method of transmitting signaling messages in a mobile telecommunications network |
| KR100918765B1 (en) * | 2001-10-20 | 2009-09-24 | 삼성전자주식회사 | Apparatus and method for coding and rate mating in cdma mobile communication |
| CN1319278C (en) * | 2004-03-05 | 2007-05-30 | 上海交通大学 | Turbo product code serial cascade NR code channel coding method |
-
2009
- 2009-02-13 CN CN200910046162A patent/CN101807969B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101807969B (en) | 2012-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103684477B (en) | Generation method and generation device for mixed polar code | |
| CN101087181B (en) | A method for removing interweaving and speed match | |
| CN1302626C (en) | Data buffer structure for asynchronously received physical channels in a CDMA system | |
| CN1130028C (en) | Viterbi decoding apparatus and viterbi decoding method | |
| CN1169320C (en) | Estimating method and equipment for wideband code division multiple access transmitting speed rate | |
| CN102405599B (en) | Extension TURBO interleaver for parallel turbo decoding | |
| CN103873186A (en) | TD-SCDMA uplink transmission channel processing method | |
| CN101969311B (en) | High-speed parallel segmented staggering Viterbi decoding method | |
| CN107659381A (en) | Coding method and device | |
| CN108631792A (en) | A kind of polarization code coding/decoding method and device | |
| CN101473544A (en) | Method and system for improving the performance of a trellis-based decoder | |
| CN104135345A (en) | Cross-layer coding and decoding method applied to long-term evolution system | |
| CN105391455B (en) | A kind of zero Turbo code starting point and depth blind-identification method | |
| CN102077470B (en) | Method and device for encoding by linear block code, and method and device for generating linear block code | |
| US7505525B2 (en) | Methods and apparatus for self-inverting turbo code interleaving with high separation and dispersion | |
| CN101807969B (en) | Method for realizing GSM wireless channel coding in wireless communication system | |
| CN101286816B (en) | Parallel channel encoding apparatus applicable in multimedia sensor network | |
| CN101282193B (en) | System and method for transmission of data | |
| CN108270448A (en) | Quasi-circulating low-density parity check coding method and device | |
| CN101009489B (en) | Channel coding based on the UID channel in the PHS | |
| CN113348780B (en) | Short burst transmission method under low signal-to-noise ratio suitable for satellite communication | |
| CN105610550B (en) | A kind of Viterbi interpretation method for power line carrier communication | |
| CN108011691A (en) | The transmission method and device of a kind of low density parity check code | |
| CN106603084B (en) | It is a kind of for punching the preprocess method of LDPC Hard decision decoding | |
| CN100359831C (en) | Bit uniformly-inserted parallel cascaded code interleaving method and its interleaving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170620 Address after: 201203 Shanghai Zhangjiang High Tech Park of Pudong New Area Chunxiao Road No. 439 Building No. 2 Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Address before: 201204, building 1, building 180, Zhang Heng Road, Pudong New Area, Shanghai, 4F Patentee before: Shanghai Mobilepeak Semiconductor Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288 Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Address before: 201203 Shanghai Zhangjiang High Tech Park of Pudong New Area Chunxiao Road No. 439 Building No. 2 Patentee before: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180410 Address after: The 300456 Tianjin FTA test area (Dongjiang Bonded Port) No. 6865 North Road, 1-1-1802-7 financial and trade center of Asia Patentee after: Xinji Lease (Tianjin) Co.,Ltd. Address before: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288 Patentee before: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100818 Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xinji Lease (Tianjin) Co.,Ltd. Contract record no.: 2018990000196 Denomination of invention: Method for realizing GSM wireless channel coding in wireless communication system Granted publication date: 20120919 License type: Exclusive License Record date: 20180801 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221017 Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288 Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Address before: 300456 1-1-1802-7, north area of financial and Trade Center, No. 6865, Asia Road, Tianjin pilot free trade zone (Dongjiang Bonded Port Area) Patentee before: Xinji Lease (Tianjin) Co.,Ltd. |