CN101399633B - Interference resisting method combining Reed-Solomon code with grid coding modulation technique - Google Patents

Interference resisting method combining Reed-Solomon code with grid coding modulation technique Download PDF

Info

Publication number
CN101399633B
CN101399633B CN200810121760A CN200810121760A CN101399633B CN 101399633 B CN101399633 B CN 101399633B CN 200810121760 A CN200810121760 A CN 200810121760A CN 200810121760 A CN200810121760 A CN 200810121760A CN 101399633 B CN101399633 B CN 101399633B
Authority
CN
China
Prior art keywords
data
reed
solomon code
signal
modulation technique
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.)
Expired - Fee Related
Application number
CN200810121760A
Other languages
Chinese (zh)
Other versions
CN101399633A (en
Inventor
杨丽萍
赵民建
王志雄
王培雅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN200810121760A priority Critical patent/CN101399633B/en
Publication of CN101399633A publication Critical patent/CN101399633A/en
Application granted granted Critical
Publication of CN101399633B publication Critical patent/CN101399633B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The invention discloses an anti-interference method combining the Reed-Solomon (RS) code with the Trellis Coded Modulation (TCM) technique. The method comprises the following steps: (1) obtaining source data from a data source; (2) encoding the source data by an RS product encoder and a TCM encoder at a transmitting end; (3) Modulating the encoded data into a Phase Shift Keying (PSK) signal; (4) transmitting two modulation signals including an is directional component (I) and a quadrature component (Q) of the PSK on a communication channel; (5) receiving the transmitted signals, and carrying out Viterbi decoding, TCM recoding and comparative decision on the two signals including the I and the Q; and (6) transmitting the Viterbi decoding data and the decision information to the RS decoder for decoding, and recovering the transmitted source data. In a frequency hopping transmission system, the method better distinguishes random bit interference and burst hopping interference, improves the system error correction capability, and solves the conflict between the channel encoding efficiency and the communication reliability of the frequency hopping transmission system.

Description

The anti-interference method of combining Reed-Solomon code with grid coding modulation technique
Technical field
The present invention relates to the field of digital communication, more particularly, relate to a kind of anti-interference method of combining Reed-Solomon code with grid coding modulation technique.
Background technology
Frequency hopping is a type in the spread spectrum communication system, and it has good interference free performance, has obtained extensive use in the military communication field.The operation principle of frequency hopping is to constitute the carrier frequency that frequency hopping pattern is controlled each moment with pseudo-code sequence, makes its saltus step fast in the good frequency of the predefine of one group of fixed number, thereby hides interference, reaches the purpose of signal reliable transmission.In the frequency hopping communications process, except meeting receives white Gaussian noise (AWGN) influence, more can receive the influence of jam signal, especially all the more so in the particular surroundings of battlefield communication.
The channel error correction coding can effectively be corrected in the frequency hopping transmission system by disturbing the mistake of being introduced; But existing anti-interference method is applicable to the antagonism white Gauss noise more; For the artificial disturbance of burst, its error correcting capability receives certain limitation, does not often reach the successful preferably probability of acceptance.
The anti-random bit mistake that the present invention is directed to frequency-hopping system is jumped Problem-Error with resisting to happen suddenly, and has proposed a kind of anti-interference method of RS sign indicating number combination TCM technology, preferably resolves the problems referred to above, and has simply widely applicable advantage.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of anti-interference method of combining Reed-Solomon code with grid coding modulation technique is provided.
The anti-interference method of combining Reed-Solomon code with grid coding modulation technique may further comprise the steps:
1) obtains source data from data source;
2) with source data, the product coding device of the Reed-Solomon code of process transmitting terminal and the encoder encodes of grid coding modulation technique;
3) will compile the sign indicating number data-modulated become phase shift keyed signal;
4) component in the same way, the quadrature component two-way modulation signal of transmission phase shift keyed signal on communication port;
5) receive the signal sent and the component in the same way that will receive, the quadrature component two paths of signals carries out the recodification of Viterbi decoding, grid coding modulation technique and relatively judgement;
6) give the decoder for decoding of Reed-Solomon code with Viterbi decoding data and discriminative information, thereby recover the source data of transmission.
Described with source data, the product coding device of the Reed-Solomon code of process transmitting terminal and the encoder encodes step of grid coding modulation technique:
1) adopt two Reed-Solomon codes respectively data block to be carried out the Reed-Solomon code coding of vertical and horizontal; Form the bidimensional product code; It is that
Figure GSB00000590018200021
frequency hopping transmission system is a frame with the n jumping that wrong probability of interference is jumped in the burst of supposing channel; The error correcting capability of Reed-Solomon code is x; When being jumped the wrong jumping figure that disturbs smaller or equal to x when happening suddenly in the frame so; Receiving terminal is the ability correct decoding just, designs Reed-Solomon code according to y, and the correct probability y that receives is expressed as:
y = F ( x | n , p )
= n 0 p 0 ( 1 - p ) n + n 1 p 1 ( 1 - p ) ( n - 1 ) + . . . + n x p x ( 1 - p ) ( n - x )
= Σ i = 0 x n i p i ( 1 - p ) ( n - i )
2) data of seeing off of Reed-Solomon code coding are carried out the grid coding modulation technique coding.
Signal that described reception is sent and the component in the same way that will receive, quadrature component two paths of signals carry out the recodification and the comparison decision steps of Viterbi decoding, grid coding modulation technique:
Component in the same way, the quadrature component two paths of signals that 1) will receive are mapped on the planisphere, declare firmly through the zone to obtain data bit Z k 1
2) component in the same way, the quadrature component two paths of signals that receives carried out Viterbi decoding and obtain decoding data bit S k';
3) to S k' coding of grid coding modulation technique obtains data bit Z again k 2
4) Z of each jumping of comparison k 1And Z k 2, judge the number of errors of each jumping figure certificate, if number of errors surpasses certain thresholding M, think that with regard to equivalence a whole jumping figure disturbs according to all being jumped by burst, produces an expression signal p who is jumped interference by burst k=1, wherein k jumps number, otherwise pK=0.
Describedly give the decoder for decoding of Reed-Solomon code, thereby recover the source data step of transmission: with Viterbi decoding data S Viterbi decoding data and discriminative information k' with a frame in the disturbed condition expression signal p of each jumping kGive the decoder for decoding of Reed-Solomon code, thereby recover the source data of transmission.
Described thresholding M is: the data that probability of occurrence=number of errors/one of number of errors jumps under the statistics random bit disturbs under a certain signal to noise ratio; The data that probability of occurrence=number of errors/one of number of errors jumped under the statistics burst was jumped and disturbed; Two probability are drawn on same the statistical chart; Article two, the intersection point of curve is exactly threshold value M, and each individual character is made an uproar than corresponding statistical charts all, and signal to noise ratio is high more; Article two, the peak value of curve just leaves far more, and final M value selected is under the successful probability of acceptance is 0.5 o'clock signal to noise ratio, to choose.
The present invention has distinguished random bit interference and burst preferably and has jumped interference in the frequency hopping transmission system, has strengthened the error correcting capability of system, has solved the chnnel coding efficient of frequency hopping transmission system and the contradiction of communication reliability; Because of the universality of this scheme, can apply to the frequency-hopping system of each speed simultaneously.
Description of drawings
Fig. 1 is the system block diagram according to embodiment of the present invention;
Fig. 2 is according to transmitting terminal RS coding schematic block diagram of the present invention;
Fig. 3 is according to receiving terminal decoding flow diagram of the present invention;
Fig. 4 is according to the TCM-8PSK encoder model in embodiment of the present invention;
Fig. 5 is according to declaring zoning plan firmly in embodiment of the present invention;
Fig. 6 is according to the error thresholds statistical chart in embodiment of the present invention;
Fig. 7 disturbs the ber curve under (awgn channel) condition according to embodiment of the present invention at random bit;
Fig. 8 disturbs (awgn channel) and burst to jump the successful probability of acceptance performance curve under (10%) condition of interference according to embodiment of the present invention at random bit;
Fig. 9 disturbs (awgn channel) and burst to jump the successful probability of acceptance performance curve under (20%) condition of interference according to embodiment of the present invention at random bit;
Figure 10 disturbs (awgn channel) and burst to jump the successful probability of acceptance performance curve under (30%) condition of interference according to embodiment of the present invention at random bit;
Embodiment
The RS sign indicating number is that one type of very strong multi-system of error correcting capability is won (BCH) sign indicating number of this (Bose), Cha Dehuli (Chaudhuri) and Huo Kun lattice nurse (Hocquenghem).TCM is a kind of technology that will encode and combine with chopping phase.
The RS sign indicating number combines the anti-interference method of TCM technology may further comprise the steps:
1) obtains source data from data source;
2) with source data, through the RS product coding device and the TCM encoder encodes of transmitting terminal;
3) will compile the sign indicating number data-modulated become psk signal;
4) I, the Q two-way modulation signal of transmission PSK on communication port;
5) receive the signal sent and with the I that receives, Q two paths of signals carry out Viterbi decoding, TCM recodes and relatively judgement;
6) give RS decoder for decoding with Viterbi decoding data and discriminative information, thereby recover the source data of transmission.
Described with source data, the RS product coding device and the TCM encoder encodes step of process transmitting terminal:
1) adopt two RS sign indicating numbers respectively data block to be carried out vertical and horizontal RS coding; Inserted the serial concatenation of codes of row-column interleaver in the middle of regarding as; Form the bidimensional product code; The sign indicating number type design of RS must be considered channel circumstance, and the interference of channel mainly contains the random bit interference and the burst jumping is disturbed, especially at the channel that is having under the wrong interference of burst jumping.It is that
Figure GSB00000590018200041
frequency hopping transmission system is a frame with the n jumping that wrong probability of interference is jumped in the burst of supposing channel; The error correcting capability of RS sign indicating number is x; When being jumped the wrong jumping figure that disturbs smaller or equal to x when happening suddenly in the frame so; Receiving terminal is the ability correct decoding just; Design the RS sign indicating number according to y, the correct probability y that receives is expressed as:
y = F ( x | n , p )
= n 0 p 0 ( 1 - p ) n + n 1 p 1 ( 1 - p ) ( n - 1 ) + . . . + n x p x ( 1 - p ) ( n - x )
= Σ i = 0 x n i p i ( 1 - p ) ( n - i )
2) data of seeing off of RS coding are carried out the TCM coding.
The signal that described reception is sent and the I that receives, Q two paths of signals carried out that Viterbi decoding, TCM are recoded and decision steps relatively:
1) I that receives, Q two paths of signals are mapped on the planisphere, declare firmly through the zone and obtain data bit Z k 1
2) I, the Q two paths of signals that receives carried out Viterbi decoding and obtain decoding data bit S k';
3) to S k' the TCM coding obtains data bit Z again k 2
4) Z of each jumping of comparison k 1And Z k 2, judge the number of errors of each jumping figure certificate, if number of errors surpasses certain thresholding M, think that with regard to equivalence a whole jumping figure disturbs according to all being jumped by burst, produces an expression signal p who is jumped interference by burst k=1, wherein k jumps number, on the contrary p k=0.
Describedly give RS decoder for decoding, thereby recover the source data step of transmission: with Viterbi decoding data S Viterbi decoding data and discriminative information k' with a frame in the disturbed condition expression signal p of each jumping kGive RS decoder for decoding, thereby recover the source data of transmission.
Described thresholding M is: the data that probability of occurrence=number of errors/one of number of errors jumps under the statistics random bit disturbs under a certain signal to noise ratio; The data that probability of occurrence=number of errors/one of number of errors jumped under the statistics burst was jumped and disturbed; Two probability are drawn on same the statistical chart; Article two, the intersection point of curve is exactly threshold value M, and each individual character is made an uproar than corresponding statistical charts all, and signal to noise ratio is high more; Article two, the peak value of curve just leaves far more, and final M value selected is under the successful probability of acceptance is 0.5 o'clock signal to noise ratio, to choose.
The present invention realizes the high error correcting capability of frequency hopping transmission system under random bit interference and burst jumping interference environment, and on the hardware platform of XILINX VIRTEX-4 XC4VLX60, obtains implementing checking.
As shown in Figure 1, a kind of system block diagram of the present invention.Data source module 101 is joined with RS product coding module 102; Coder module 102 is joined with TCM coding module 103 again, and the data of having compiled sign indicating number send to channel module 105 through modulator block 104, and the signal that receiving terminal receives is accomplished demodulation in demodulator module 106; Send into Viterbi decoding module 107; Viterbi decoding module 107 and TCM recodification relatively judging module 108 are joined, and give the RS decoding module 109 completion decodings data and errors present information at last, recover data source.
As shown in Figure 2, provided the RS coding schematic block diagram of transmitting terminal.Earlier data block is carried out vertical RS coding 201, carry out horizontal RS coding 202 again.
As shown in Figure 3, provided the decoding flow diagram of receiving terminal.The I that receives, Q two paths of signals are mapped on the planisphere, declare module 301 firmly through the zone and obtain data bit Z k 1Simultaneously I, the Q two paths of signals that receives carried out Viterbi decoding 302 and obtain decoding data bit S k'; To S k' TCM coding 303 obtains data bit Z again k 2Through comparing the relatively Z of each jumping of judging module 304 k 1And Z k 2, judge the number of errors of each jumping figure certificate, if number of errors surpasses certain certain threshold M, just can equivalence think that a whole jumping figure disturbs according to all being jumped by burst, produces one by the expression signal p of burst jumping interference k=1, wherein k jumps number, on the contrary p k=0; With Viterbi decoding data S k' with a frame in the disturbed condition expression signal p of each jumping kGive the RS decoder 305 decodings, recover initial data.
In an embodiment, to the frequency hopping transmission system of 128kbps speed, carry out the anti-interference conceptual design that cascade RS sign indicating number combines the TCM technology.
At first the sign indicating number type to RS designs; Can know according to principle; It is that
Figure GSB00000590018200051
frequency hopping transmission system is a frame with the n jumping that wrong probability of interference is jumped in the burst of supposing channel, and the error correcting capability of RS sign indicating number is x.When being jumped the wrong jumping figure that disturbs smaller or equal to x when happening suddenly in the frame so, receiving terminal is the ability correct decoding just.The correct probability y that receives is expressed as:
y = F ( x | n , p )
= n 0 p 0 ( 1 - p ) n + n 1 p 1 ( 1 - p ) ( n - 1 ) + . . . + n x p x ( 1 - p ) ( n - x )
= Σ i = 0 x n i p i ( 1 - p ) ( n - i )
In an embodiment, n=26, p=0.3, (x|n p), obtains table 1 according to y=F.Find that the probability of success of anti-30% burst mistake can reach more than 95% when x >=12.
The correspondence table of x and y in table 1 instance
Figure GSB00000590018200055
Figure GSB00000590018200061
The TCM coded portion adopts the TCM-8PSK systematic code, and is as shown in Figure 4.
The I, the Q two paths of signals that are modulated into 8PSK arrive receiving terminal through channel.
As shown in Figure 5, be to declare used zoning plan among the embodiment firmly, when the corresponding point of I, Q two paths of signals dropped on the zoning plan a certain zone, territory conduct that just should the zone was declared the result firmly and is exported.As shown in Figure 6, be the statistical chart of simulation result among the embodiment, abscissa is represented Z in the jumping k 1And Z k 2Different numbers are relatively promptly thought a number of errors in jumping, and ordinate is represented the probability that number of errors occurs, and the M value just is chosen to be error thresholds.Final M value selected is under the successful probability of acceptance is signal to noise ratio snr=6.5dB of 0.5 o'clock, to compromise to choose.
As shown in Figure 7, provided above-mentioned specific embodiments of the present invention and disturbed the ber curve under (awgn channel) condition at random bit.As shown in Figure 8, provided above-mentioned specific embodiments of the present invention and disturbed (awgn channel) and 10% burst to jump the successful probability of acceptance performance curve that disturbs under the condition concurrent at random bit.Referring to Fig. 9, provided above-mentioned specific embodiments of the present invention and disturbed (awgn channel) and 20% burst to jump the successful probability of acceptance performance curve that disturbs under the condition concurrent at random bit.Shown in figure 10, provided above-mentioned specific embodiments of the present invention and disturbed (awgn channel) and 30% burst to jump the successful probability of acceptance performance curve that disturbs under the condition concurrent at random bit.Can find out that method of the present invention is very effective.
The present invention is the anti-interference method that a kind of RS sign indicating number combines the TCM technology.Method described here and circuit, single component separated from one another can be traditional fully, we require their combination is protected as invention.The above is merely the embodiment of certain applications; But true spirit of the present invention and scope are not limited to this; Any those of ordinary skill in the art can revise the concrete grammar of single component, realize that the RS sign indicating number of different application occasion combines the technological anti-interference conceptual design of TCM.The present invention is only limited appended claim book and come thereof, and we require these are protected as the present invention.

Claims (4)

1. the anti-interference method of a combining Reed-Solomon code with grid coding modulation technique is characterized in that may further comprise the steps:
1) obtains source data from data source;
2) with source data, the product coding device of the Reed-Solomon code of process transmitting terminal and the encoder encodes of grid coding modulation technique;
3) will compile the sign indicating number data-modulated become phase shift keyed signal;
4) component in the same way, the quadrature component two-way modulation signal of transmission phase shift keyed signal on communication port;
5) receive the signal sent and the component in the same way that will receive, the quadrature component two paths of signals carries out the recodification of Viterbi decoding, grid coding modulation technique and relatively judgement;
6) give the decoder for decoding of Reed-Solomon code with Viterbi decoding data and discriminative information, thereby recover the source data of transmission;
Signal that described reception is sent and the component in the same way that will receive, quadrature component two paths of signals carry out the recodification and the comparison decision steps of Viterbi decoding, grid coding modulation technique:
Component in the same way, the quadrature component two paths of signals that (1) will receive are mapped on the planisphere, declare firmly through the zone to obtain data bit Z k 1
(2) component in the same way, the quadrature component two paths of signals that receives carried out Viterbi decoding and obtain decoding data bit S k';
(3) to S k' coding of grid coding modulation technique obtains data bit Z again k 2
(4) Z of each jumping of comparison k 1And Z k 2, judge the number of errors of each jumping figure certificate, if number of errors surpasses certain thresholding M, think that with regard to equivalence a whole jumping figure disturbs according to all being jumped by burst, produces an expression signal p who is jumped interference by burst k=1, wherein k jumps number, on the contrary p k=0.
2. the anti-interference method of a kind of combining Reed-Solomon code with grid coding modulation technique according to claim 1; It is characterized in that described with source data, through the product coding device of the Reed-Solomon code of transmitting terminal and the encoder encodes step of grid coding modulation technique:
(1) adopt two Reed-Solomon codes respectively data block to be carried out the Reed-Solomon code coding of vertical and horizontal, form the bidimensional product code, it is p that wrong probability of interference is jumped in the burst of supposing channel; The frequency hopping transmission system is a frame with the n jumping; The error correcting capability of Reed-Solomon code is x, and when being jumped the wrong jumping figure that disturbs smaller or equal to x when happening suddenly in the frame so, receiving terminal is the ability correct decoding just; Design Reed-Solomon code according to y, the correct probability y that receives is expressed as:
Figure FSB00000590018100023
(2) data of seeing off of Reed-Solomon code coding are carried out the grid coding modulation technique coding.
3. the anti-interference method of a kind of combining Reed-Solomon code with grid coding modulation technique according to claim 1; It is characterized in that describedly giving the decoder for decoding of Reed-Solomon code, thereby recover the source data step of transmission: with Viterbi decoding data S Viterbi decoding data and discriminative information k' with a frame in the disturbed condition expression signal p of each jumping kGive the decoder for decoding of Reed-Solomon code, thereby recover the source data of transmission.
4. the anti-interference method of a kind of combining Reed-Solomon code with grid coding modulation technique according to claim 2 is characterized in that described thresholding M is: the data that probability of occurrence=number of errors/one of number of errors jumps under the statistics random bit disturbs under a certain signal to noise ratio; The data that probability of occurrence=number of errors/one of number of errors jumped under the statistics burst was jumped and disturbed; Two probability are drawn on same the statistical chart; Article two, the intersection point of curve is exactly threshold value M, all corresponding statistical chart of each signal to noise ratio, and signal to noise ratio is high more; Article two, the peak value of curve just leaves far more, and final M value selected is under the successful probability of acceptance is 0.5 o'clock signal to noise ratio, to choose.
CN200810121760A 2008-10-17 2008-10-17 Interference resisting method combining Reed-Solomon code with grid coding modulation technique Expired - Fee Related CN101399633B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200810121760A CN101399633B (en) 2008-10-17 2008-10-17 Interference resisting method combining Reed-Solomon code with grid coding modulation technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200810121760A CN101399633B (en) 2008-10-17 2008-10-17 Interference resisting method combining Reed-Solomon code with grid coding modulation technique

Publications (2)

Publication Number Publication Date
CN101399633A CN101399633A (en) 2009-04-01
CN101399633B true CN101399633B (en) 2012-09-05

Family

ID=40517918

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200810121760A Expired - Fee Related CN101399633B (en) 2008-10-17 2008-10-17 Interference resisting method combining Reed-Solomon code with grid coding modulation technique

Country Status (1)

Country Link
CN (1) CN101399633B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105429729B (en) * 2015-11-03 2018-11-09 西安烽火电子科技有限责任公司 A kind of ultrashort continuous phase Trellis-coded modulation coherent demodulation method
CN108052828B (en) * 2017-12-26 2021-02-23 Oppo广东移动通信有限公司 Method and device for generating screen recording file, terminal and storage medium
CN115276906B (en) * 2022-07-25 2024-04-05 哲库科技(上海)有限公司 Data frame transmission method, device, chip, storage medium and Bluetooth equipment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1197337A (en) * 1997-04-03 1998-10-28 美国电报电话公司 Method and apparatus for spectral efficient transmission of CDMA modulated signals

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1197337A (en) * 1997-04-03 1998-10-28 美国电报电话公司 Method and apparatus for spectral efficient transmission of CDMA modulated signals

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
朱维乐，顾德仁.CPLPS图文电视系统的误码保护_CD码.《电子科技大学学报》.1990,第19卷(第2期), *
李林海,黄国策.格状编码技术在超短波战术数据链中的性能研究.《现代电子技术》.2002,(第136期), *

Also Published As

Publication number Publication date
CN101399633A (en) 2009-04-01

Similar Documents

Publication Publication Date Title
CN100454766C (en) Decoding apparatus and method for decoding the data encoded with an LDPC code
CN100466497C (en) Telecommunication system and method for transmitting signal in the same
CN103532663B (en) A kind of frequency hopping fountain code system and transmission method thereof
AU768912B2 (en) Apparatus and method for transmitting/receiving data in a CDMA mobile communication system
US7190737B2 (en) Multi-mode block-coded modulation/demodulation method
CN101785222B (en) System and method for multilevel shaping for wireless communication systems
CN102668385B (en) There is iterative decoding and the demodulation of feedback attenuation
US20050216821A1 (en) Mapping method for encoded bits using LDPC code, transmitting and receiving apparatuses employing this method, and program for executing this method
CN105933010A (en) Low-complexity polarization code decryption SCL algorithm based on segmented verification assistance
CN101123439A (en) A coding modulation and decoding method and device for grid coding and modulation code
KR19990003403A (en) Data Transmission Method for Diversity Systems
CN102694624A (en) Self-adaptive code modulation method and device
US8875000B2 (en) Methods and systems systems for encoding and decoding in trellis coded modulation systems
Lu et al. New Miller codes for run-length control in visible light communications
CN101262307B (en) A serial cascaded compiling and decoding system including rotary modulation mode of constellation map
CN101399633B (en) Interference resisting method combining Reed-Solomon code with grid coding modulation technique
CN103516465A (en) Coded modulation and demodulation and demodulation and decoding method, device and system
US7505526B2 (en) Methods and apparatus for self-inverting turbo code interleaving with high separation and dispersion
KR20160031781A (en) Method and apparatus for decoding in a system using binary serial concatenated code
CN100486235C (en) Iterative receiving method for maintaining soft information
KR20060063012A (en) Apparatus and method for transmitting data by constellation combination in a communication system
CN112398580B (en) Modulation method and device
CN113348780B (en) Short burst transmission method under low signal-to-noise ratio suitable for satellite communication
CN104410596B (en) A kind of modulation and demodulation method of enhanced sextuple 32PSK
Chen et al. Golay (20, 8) C code simulation and implementation in DSP chip

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
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120905

Termination date: 20151017

EXPY Termination of patent right or utility model