CN1497884A - Single carrier transmission system and its method - Google Patents
Single carrier transmission system and its method Download PDFInfo
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- CN1497884A CN1497884A CNA031392989A CN03139298A CN1497884A CN 1497884 A CN1497884 A CN 1497884A CN A031392989 A CNA031392989 A CN A031392989A CN 03139298 A CN03139298 A CN 03139298A CN 1497884 A CN1497884 A CN 1497884A
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- single carrier
- sequence
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/361—Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0022—PN, e.g. Kronecker
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/004—Orthogonal
- H04J13/0048—Walsh
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Error Detection And Correction (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
A system for transmitting single carrier and a transmitting method thereof are provided to insert additional information by using a Walsh code, thereby increasing the reliability of transmission signals. A scrambler(100) randomizes transmitting data signals. An FEC(Forward Error Correction) unit(110) corrects a bit error of an inputted data stream. A PN(Pseudo Noise sequence) information generator(120) generates PN information which is synchronous information for synchronization between a transmitting side and a receiving side. A Walsh code generator(130) generates a Walsh code which is additional information related to the transmitting side. A logic combination unit(140) logically combines the generated Walsh code with the PN information. A multiplexer(150) inserts the combined Walsh code and the PN information into the data stream.
Description
Technical field
The present invention relates generally to single carrier transmitting system and method thereof, relate in particular to the single carrier transmitting system and the method thereof of the reliability that can improve the signal that is transmitted.
Background technology
In communication multimedia, computer and the broadcasting epoch, countries in the world are all always in the broadcasting of digitized simulation type.Particularly, use the digit broadcasting system of satellite to be developed and to have dropped into practicality in developed country such as the U.S., Europe and Japanese.Along with development fast, proposed the different standards that is used for digital broadcasting respectively in various countries.
On December 24th, 1996, the Federal Communications Committee of the U.S. (FCC) passed through the broadcast standard of the digital television standard of Advanced Television Systems Committee as TV of future generation.All terrestrial broadcasting operators must observe and video/audio compression, packet data transmission structure, the modulation ATSC standard relevant with the transmission system standard.Have only the standard of video format not announced (stated), but determine by industrial quarters.
According to the ATSC standard, described video compression scheme adopts the ISO/IEC IS13812-2 standard of motion image expert group 2 (MPEG-2).This standard has been adopted to the standard of all digital broadcasting types of the whole world.Audio compression scheme adopts digital audio compression-3 (AC-3) standard of being proposed by Dolby.The ISO/IEC IS13812 standard of MPEG-2 system has been adopted to a kind of multichannel multiplexing method.This multichannel multiplexing method and video compression scheme are used as in the motion in Europe together.8-vestigial sideband (8-VSB) is adopted to the method for modulation and transmission.Described VSB method is proposed for digital television broadcasting, and the frequency band that uses 6MHz is to obtain the high frequency band efficiency data transfer rate of 19.39Mbps by a simple structure.This also be designed to minimize and the broadcast channel of the existing broadcast system of NTSC (NTSC) between interference.Even for also can stable operation under noise circumstance, this method have been used pilot signal, segment sync signal and field sync signal.Further, for fear of mistake, this method has been used Read-Solomon (RS) sign indicating number and grid (Trellis) coding.
The ATSC digital television standard is to be used to use single carrier VSB method with 6MHz frequency band transmission high-quality video, audio frequency and additional data, and supports terrestrial broadcasting pattern and High Data Rate wired broadcasting pattern simultaneously.The main aspect of this method is the 8-VSB modulator approach, and this method is a kind of modification of existing simulation VSB method, can the modulation of combine digital signal.
Fig. 1 is the schematic block diagram that illustrates according to the digit broadcasting system of ATSC standard.With reference to Fig. 1, described digit broadcasting system comprises scrambler 10, forward error correction (FEC) unit 20, multiplexer (MUX) 30, pilot plug-in unit 40, modulating unit 50 and radio frequency (RF) transducer 60.Described FEC unit 20 comprises Read-Solomon (RS) encoder 21, interleaver 23 and trellis encoder 25.
Scrambler 10 is called as the data random device, and it carries out randomization operation to data signals transmitted, prevent whereby since during synchronous data transmission owing to repeat the problem that synchronizing signal that numeral such as 00000000b or 11111111b cause is lost.The predetermined pattern of scrambler 10 usefulness changes the byte of each data-signal, and this processing be reversed so that accurate value is resumed at receiving terminal.
The order of 23 pairs of data flow of interleaver interweaves, and disperses the data of transmission whereby on time shaft.By doing like this, the data of transmission become and are not afraid of (insensitive) interference.By disperseing the data of transmission, when appearing at certain location, noise kept signal at other frequency band.Receiver reverses above-mentioned processing, reverts to the transmission signals that disperses with primary signal just the same whereby.
Different with RS encoder 21, trellis encoder 25 has a dissimilar FEC structure.And different with the RS encoder 21 that constitutes whole M PEG-II stream, trellis encoder 25 considers that the influence of time encodes.This b referred to as convolution code.Trellis encoder 25 is divided into 42 bit words to the byte of 8 bits.Described 2 bit words quilts and previous word compare, and generate the binary code of one 3 bit, and purpose is to describe the change from previous word to current word.This 3 bit code is transferred to the 8 level code elements of described 8-VSB rather than 2 original bit words (3 bits=8 level).Therefore, 2 bit words that are input to trellis encoder 25 are converted and export as 3 bit signals.Because this feature, 8-VSB is called as 2/3 rate coding device sometimes.The advantage of grid coding is that signal can be followed the tracks of with chronomere, thereby has removed error message.
Behind the grid coding of trellis encoder 25, multiplexer 30 inserts the synchronous and frame synchronization of section in transmission signals.Pilot plug-in unit 40 is inserted into the ATSC pilot tone and has been inserted into section synchronously and the transmission signals of frame synchronization.Here, after just finishing modulation, apply a 1.25v that slight DC deviation is arranged to the 8-VSB baseband signal at once.When this takes place, at slight residual carrier of zero frequency point appearance of modulation spectrum.The residual carrier of this generation is called as " ATSC pilot tone ".
Modulating unit 50 is by using the signal modulation of 8-VSB modulation to receiving from pilot plug-in unit 40.The signal of radio frequency converter 60 conversion modulation, and export the signal of conversion by antenna.
The ATSC data segment is made of 187 bytes and 20 bytes of original MPEG-II data flow.Behind grid coding, 207 bytes of section are become the individual 8 level code element stream in 828 (207 * 4).
Segment sync signal is the pulse of 41 bytes, and described pulse is repeatedly added to the beginning of data segment and is used to replace the sync byte of original MPEG-II transport stream.Receiver can be distinguished the segment sync signal of repeat pattern from the data of completely random, even and can also and disturb when being in the level that does not allow the data self-recovery accurately recovered clock at noise.Figure 2 illustrates the section that segment sync signal (that is, section synchronously) is assigned to its transmission signals.As shown, the section of transmission signals comprises the segment sync signal of 4 code elements, the transmission mode that is respectively 3 pseudo noises (PN) sequence of 63 code elements, 24 code elements, 96 reservation code elements and 12 pre-sign indicating number code elements.The PN sequence is the synchronizing information sequence that is used for the synchronous and channel estimating of receiver.The PN sequence is produced by PN sequence generation unit (not shown), and is inserted in the transmission signals by multiplexer 30.
Fig. 3 is the view that the frame structure of ATSC data is shown.With reference to Fig. 3, the field of ATSC data comprises 313 continuous data segments, and ATSC field sync (being field sync) becomes the field data section.The ATSC Frame is made of 2 ATSC data fields.
Repeat the ATSC data field with time interval 24.2ms, the 16.7ms perpendicular separation of this and NTSC is similar.Section has well-known data symbols pattern synchronously, and is used in the receiver to remove ghost image.More particularly, remove ghost image and be by relatively, and use the error vector that draws to adjust ghost image and remove the characteristic of equalizer and realize the signal that comprises mistake and field sync.
Usually, the system information signal of the transmission mode of indication mechanism is by using spread-spectrum and be inserted into PN sequence back or among the field sync unit.Yet owing to the field sync signal and without the FEC unit, many warps that show in transmission process or burst noise can cause the distortion of signal.The distortion of this system information causes the reception problem at the digital broadcast signal receiving terminal subsequently.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of in single carrier type digit broadcasting system by using Walsh the sign indicating number digital broadcasting transmission system and the transmission method thereof of system information signal reliably.
In order to realize top target, provide a kind of single carrier transmitting system.This single carrier transmitting system comprises: the scrambler unit is used for TS (transport stream) scrambler to transmitting; The FEC unit is used for carrying out forward error correction from the TS behind the scrambler of scrambler unit to form the TS of coding; PN sequence generation unit is used to produce the PN sequence; Walsh sign indicating number generation unit is used to produce the Walsh sign indicating number corresponding to identifying information; The logic coupling unit is used for Walsh sign indicating number and PN sequence that the logic coupling is produced by Walsh sign indicating number generation unit; Multiplexer (MUX) is used for inserting by the signal and the tail code element of the coupling of logic coupling unit multiplexed to carry out by the TS behind coding; Modulating unit is used for multiplexed TS modulation; And radio frequency converter, be used for carry out the radio frequency conversion from the TS after the modulation of described modulating unit.
According to another aspect of the present invention, provide a kind of single carrier transmission method.Described single carrier transmission method comprises following step: to TS (transport stream) scrambler that will transmit; To carrying out forward error correction from the TS behind the scrambler of scrambler unit to form the TS of coding; Produce the PN sequence; Generation is corresponding to the Walsh sign indicating number of identifying information; Logic is coupling in the Walsh sign indicating number and produces the Walsh sign indicating number of step generation and produce the PN sequence that step produces in the PN sequence; Multiplexed by the signal and the tail code element that are inserted in the coupling of logic coupling step among the TS behind coding to carry out; To multiplexed TS modulation; With to carry out the radio frequency conversion from the TS after the modulation of described modulating unit.
Description of drawings
Above-mentioned target of the present invention and feature are by will be more clear to the explanation of embodiments of the invention with reference to accompanying drawing, wherein:
Fig. 1 is the block diagram that schematically shows according to the digit broadcasting system of ATSC standard;
Fig. 2 is the view that is illustrated in the section of the transmission signals in the system among Fig. 1;
Fig. 3 is the view of structure that the frame of ATSC data is shown;
Fig. 4 is the view that schematically shows according to digital broadcasting transmission system of the present invention;
Fig. 5 is the flow chart that the digital broadcast transmission method of the system among Fig. 4 is shown;
Fig. 6 is the view that schematically shows according to the frame structure of transmission signals of the present invention.
Embodiment
Below, be described with reference to the accompanying drawings the preferred embodiments of the present invention.
Fig. 4 is the view that schematically shows according to the digit broadcasting system of an example of the present invention, and Fig. 5 is the flow chart that the digital broadcast transmission method of the system among Fig. 4 is shown.With reference to Fig. 4, digit broadcasting system according to the present invention comprises scrambler 100, forward error correction (FEC) unit 110, pseudo noise (PN) sequence generation unit 120, Walsh sign indicating number generation unit 130, logic coupling unit 140, multiplexer (MUX) 150, modulating unit 170 and radio frequency (RF) transducer 180.Further, FEC unit 110 comprises Read-Solomon (RS) encoder 111, interleaver 113 and trellis encoder 115.
The scrambler 100 that is called as the data random device for fear of during synchronous data transmission because the problem that the synchronizing signal that causes such as the repetition numeral of 00000000b or 11111111b is lost is carried out random operation to data signals transmitted.The predetermined pattern of scrambler 10 usefulness changes the byte of each data-signal, and this processing is reversed to recover accurate original value at receiving terminal.
The error code of relevant input traffic is corrected in FEC unit 110.Because the operation of RS encoder 111, interleaver 113 and trellis encoder 115 is carried out according to the ATSC standard, will omit further instruction here.
PN sequence generation unit 120 produces the PN sequence, that is, it produces and is used for synchronizing information synchronous between transmission ends and receiving terminal, and gives multiplexer 150 the PN sequence transmission that produces subsequently.The PN sequence that is produced by PN sequence generation unit can be realized as the code element of different numbers, such as 255 code elements, 511 code elements, 1023 code elements, 2047 code elements and 8191 code elements.And " transmission ends " in this specification refers to and is equipped with digital broadcasting transmission system to be used for the receiving terminal of broadcasting according to single carrier mode transmission of digital, and " receiving terminal " refers to the receiving terminal that receives the digital broadcasting of transmission according to the single carrier mode.
Walsh sign indicating number generation unit 130 produces the additional information of relevant transmission ends, that is, it produces the Walsh sign indicating number.Described " additional information " refers to by what transmission ends provided and is used for the receiving terminal identifying information of decoding to received signal fast and easily.Described identifying information can comprise mapping method, code check, at least a about in the frame structure information of the TS of transmission and the data dispersed information.Further, the Walsh sign indicating number is formed by onesize bit stream group, and bit stream is by 2
NForm (N=natural number).
The PN sequence that 140 pairs of logic coupling units are produced by PN sequence generation unit 120 and carry out the logic coupling by the Walsh sign indicating number that Walsh sign indicating number generation unit 130 produces.Logic coupling unit 140 is a NOR gate circuit that is used for XOR coupling PN sequence and Walsh sign indicating number preferably.
Behind the grid coding that trellis encoder 115 is carried out, multiplexer 150 inserts the tail code element in transmission signals.Further, multiplexer 150 inserts PN sequence and the Walsh sign indicating number by 140 couplings of logic coupling unit in transmission signals.
170 pairs of multiplexed signals that receive from multiplexer 150 of modulating unit are modulated.The modulating mode of modulating unit 170 is for example QAM or QPSK.
Signal after 180 pairs of modulation of radio frequency converter carries out the radio frequency conversion, and by the signal after the antenna transmission modulation.
Fig. 5 is the flow chart that the digital broadcast transmission method of the system among Fig. 4 is shown.
With reference to Fig. 5, at step S510, the 100 couples of TS that will transmit in scrambler unit (transport stream) scrambler.
At step S520, the 110 couples of TS that encode with formation from the execution of the TS behind the scrambler of scrambler unit 100 forward error correction in FEC unit.
Simultaneously, at step S530, PN sequence generation unit 120 produces the PN sequence, and at step S540, the Walsh sign indicating number that Walsh sign indicating number generation unit 130 produces corresponding to identifying information.
Subsequently at step S550, the PN sequence that 140 pairs of logic coupling units are produced by PN sequence generation unit 120 and carry out the logic coupling by the Walsh sign indicating number that Walsh sign indicating number generation unit 130 produces.
Multiplexer (MUX) is carried out multiplexed by inserting in the TS of coding by the signal and the tail code element of the coupling of logic coupling unit at step S560.
Subsequently, at step S570,170 pairs of multiplexed TS modulation of modulating unit.
Finally, at step S580,180 pairs of radio frequency converters carry out the radio frequency conversion from the TS after the modulation of modulating unit 170.
The modulating mode of the modulating unit 170 in step S570 is for example QAM or QPSK.
As mentioned above, digit broadcasting system of the present invention can use QAM and the QPSK modulating mode that is used for the single carrier mode.More particularly, digit broadcasting system of the present invention adopts Move Mode and the distinguishing modulation of fixed mode.That is, Move Mode is used QPSK and fixed mode is used 16QAM.According to the present invention, 64QAM or 256QAM are used for the fixed mode relevant with mass data.
Fig. 6 is the view that schematically shows according to the frame structure of transmission signals of the present invention.With reference to Fig. 6, under the situation of QAM, the frame of signal comprises in order: frame synchronization, payload and training symbol, and under the situation of QPSK, the frame of signal comprises in order: frame synchronization, payload 1, training symbol, payload 2 and tail code element.Frame synchronization comprises the series of 3 PN sequences, and wherein each PN sequence is made of 511 code elements, and is control bit after the PN sequence and is remaining bit behind control bit.The series of described 3 PN sequences is called as training symbol.Here, at the bit that is transmitted by the order wire that is used for transfer of data, control bit is the bit that is used to control, for example parity bits, initial bits or end bit.
Remaining bit is the zone that purpose is used for time shaft change, Bit-Rate Reduction and error correction.Payload is the zone that is used for the information relevant with the upper strata.The tail code element is used for the additional information (that is, identifying information) that will transmit, and is called as ' tail ' symbol region, because it is added to the final node of frame.
Though described the preferred embodiments of the present invention, those skilled in the art is to be understood that the present invention is not limited to described preferred embodiment, limits within the spirit and scope of the present invention as claim and can carry out various variations and change.
Claims (20)
1. single carrier transmitting system comprises:
The scrambler unit is used for TS (transport stream) scrambler to transmitting;
The FEC unit is used for carrying out forward error correction from the TS behind the scrambler of scrambler unit to form the TS of coding;
PN sequence generation unit is used to produce the PN sequence;
Walsh sign indicating number generation unit is used to produce the Walsh sign indicating number corresponding to identifying information;
The logic coupling unit is used for Walsh sign indicating number and PN sequence that the logic coupling is produced by Walsh sign indicating number generation unit;
Multiplexer (MUX) is used for inserting by the signal and the tail code element of the coupling of logic coupling unit multiplexed to carry out by the TS behind coding;
Modulating unit is used for multiplexed TS modulation; With
Radio frequency converter is used for carry out the radio frequency conversion from the TS after the modulation of described modulating unit.
2. single carrier transmitting system as claimed in claim 1, the modulating mode of wherein said modulating unit is QAM.
3. single carrier transmitting system as claimed in claim 2, the frame of wherein said signal comprises frame synchronization, payload and training symbol in order.
4. single carrier transmitting system as claimed in claim 1, the modulating mode of wherein said modulating unit is QPSK.
5. single carrier transmitting system as claimed in claim 4, the frame of wherein said signal comprise frame synchronization, payload 1, training symbol, payload 2 and tail code element in order.
6. as claim 3 or 5 described single carrier transmitting systems, wherein said frame synchronization comprises the series of 3 PN sequences, wherein each PN sequence is made of 511 code elements, and be control bit and be remaining bit that the series of described 3 PN sequences is training symbols after the PN sequence behind control bit.
7. single carrier transmitting system as claimed in claim 6, wherein said identifying information comprise relevant frame structure information and the data dispersed information of TS with transmission at least.
8. single carrier transmitting system as claimed in claim 7, logic coupling unit wherein are XOR gate that is used for XOR coupling PN sequence and Walsh sign indicating number.
9. single carrier transmitting system as claimed in claim 8, Walsh sign indicating number wherein is made of onesize bit stream group.
10. single carrier transmitting system as claimed in claim 9, wherein each bit stream is by 2
NBit constitutes, and wherein N is a natural number.
11. a single carrier transmission method comprises the following steps:
To TS (transport stream) scrambler that will transmit;
To carrying out forward error correction from the TS behind the scrambler of scrambler unit to form the TS of coding;
Produce the PN sequence;
Generation is corresponding to the Walsh sign indicating number of identifying information;
Logic is coupling in the Walsh sign indicating number and produces the Walsh sign indicating number of step generation and produce the PN sequence that step produces in the PN sequence;
Multiplexed by the signal and the tail code element that are inserted in the coupling of logic coupling step among the TS behind coding to carry out;
To multiplexed TS modulation; With
To carry out the radio frequency conversion from the TS after the modulation of described modulating unit.
12. single carrier transmission method as claimed in claim 11, the modulating mode of wherein said modulation step is QAM.
13. single carrier transmission method as claimed in claim 12, the frame of wherein said signal comprises frame synchronization, payload and training symbol in order.
14. single carrier transmission method as claimed in claim 11, the modulating mode of wherein said modulation step is QPSK.
15. single carrier transmission method as claimed in claim 14, the frame of wherein said signal comprise frame synchronization, payload 1, training symbol, payload 2 and tail code element in order.
16. as claim 13 or 15 described single carrier transmission method, wherein said frame synchronization comprises the series of 3 PN sequences, wherein each PN sequence is made of 511 code elements, and be control bit and be remaining bit that the series of described 3 PN sequences is called as training symbol after the PN sequence behind control bit.
17. single carrier transmission method as claimed in claim 16, wherein said identifying information comprise relevant frame structure information and the data dispersed information of TS with transmission at least.
18. single carrier transmission method as claimed in claim 17, PN sequence and Walsh sign indicating number are coupled by XOR in the logic coupling step therein.
19. single carrier transmission method as claimed in claim 18, Walsh sign indicating number wherein is made of onesize bit stream group.
20. single carrier transmission method as claimed in claim 19, wherein each bit stream is by 2
NBit constitutes, and wherein N is a natural number.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR61235/2002 | 2002-10-08 | ||
| KR61235/02 | 2002-10-08 | ||
| KR1020020061235A KR100920726B1 (en) | 2002-10-08 | 2002-10-08 | Single carrier transmission system and a method using the same |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101468692A Division CN1964336A (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
| CN2006101468688A Division CN1964335B (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1497884A true CN1497884A (en) | 2004-05-19 |
| CN1299455C CN1299455C (en) | 2007-02-07 |
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Family Applications (6)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101468052A Expired - Lifetime CN1968232B (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
| CNA2006101468692A Pending CN1964336A (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
| CNB031392970A Expired - Fee Related CN100334822C (en) | 2002-10-08 | 2003-09-30 | Single carrier transmission system and its method |
| CN2006101468688A Expired - Lifetime CN1964335B (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
| CN2006101468067A Expired - Fee Related CN1968233B (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
| CNB031392989A Expired - Fee Related CN1299455C (en) | 2002-10-08 | 2003-09-30 | Single carrier transmission system and its method |
Family Applications Before (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101468052A Expired - Lifetime CN1968232B (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
| CNA2006101468692A Pending CN1964336A (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
| CNB031392970A Expired - Fee Related CN100334822C (en) | 2002-10-08 | 2003-09-30 | Single carrier transmission system and its method |
| CN2006101468688A Expired - Lifetime CN1964335B (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
| CN2006101468067A Expired - Fee Related CN1968233B (en) | 2002-10-08 | 2003-09-30 | System for transmitting single carrier and transmitting method thereof |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100920726B1 (en) |
| CN (6) | CN1968232B (en) |
| HK (4) | HK1107459A1 (en) |
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| WO2009038406A2 (en) | 2007-09-21 | 2009-03-26 | Lg Electronics Inc. | Digital broadcasting system and data processing method |
| WO2009038440A2 (en) | 2007-09-21 | 2009-03-26 | Lg Electronics Inc. | Digital broadcasting receiver and method for controlling the same |
| WO2009038438A2 (en) | 2007-09-21 | 2009-03-26 | Lg Electronics Inc. | Digital broadcasting receiver and method for controlling the same |
| WO2009038407A2 (en) | 2007-09-21 | 2009-03-26 | Lg Electronics Inc. | Digital broadcasting system and method of processing data in digital broadcasting system |
| US8422509B2 (en) | 2008-08-22 | 2013-04-16 | Lg Electronics Inc. | Method for processing a web service in an NRT service and a broadcast receiver |
| CN104333774A (en) * | 2014-11-13 | 2015-02-04 | 北京国双科技有限公司 | Detection method and device for user number of network application |
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| KR19990014555A (en) * | 1998-11-23 | 1999-02-25 | 신동관 | Orthogonal code division multiplexing method and apparatus for residual sideband modulated signal |
| KR19990014556A (en) * | 1998-11-23 | 1999-02-25 | 신동관 | Orthogonal code division multiplexing method and apparatus for residual sideband modulated signal |
| KR100673419B1 (en) * | 2000-12-28 | 2007-01-24 | 엘지전자 주식회사 | Transmitting system and data processing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI493935B (en) * | 2007-10-04 | 2015-07-21 | Qualcomm Inc | Method,apparatus,and computer program product for scrambling sequence generation in a communication system |
| US9622246B2 (en) | 2007-10-04 | 2017-04-11 | Qualcomm Incorporated | Scrambling sequence generation in a communication system |
| CN110222798A (en) * | 2019-04-24 | 2019-09-10 | 昆明理工大学 | One kind is based on the improved tail code sequence recognition methods again of the random recognition methods of tail code |
| CN110222798B (en) * | 2019-04-24 | 2021-08-13 | 昆明理工大学 | Tail code sequence re-identification method improved based on tail code random identification method |
Also Published As
| Publication number | Publication date |
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| CN1968232A (en) | 2007-05-23 |
| HK1109525A1 (en) | 2008-06-06 |
| CN1497883A (en) | 2004-05-19 |
| CN1964336A (en) | 2007-05-16 |
| KR20040032282A (en) | 2004-04-17 |
| CN1968233A (en) | 2007-05-23 |
| CN1968233B (en) | 2011-02-16 |
| CN1964335B (en) | 2010-10-13 |
| CN1968232B (en) | 2011-02-16 |
| CN1299455C (en) | 2007-02-07 |
| HK1107459A1 (en) | 2008-04-03 |
| HK1109524A1 (en) | 2008-06-06 |
| KR100920726B1 (en) | 2009-10-07 |
| CN1964335A (en) | 2007-05-16 |
| CN100334822C (en) | 2007-08-29 |
| HK1129007A1 (en) | 2009-11-13 |
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