CN108880758A - The iterative receiver algorithm for design of difference chaotic bit weaving code modulation system - Google Patents
The iterative receiver algorithm for design of difference chaotic bit weaving code modulation system Download PDFInfo
- Publication number
- CN108880758A CN108880758A CN201810823911.2A CN201810823911A CN108880758A CN 108880758 A CN108880758 A CN 108880758A CN 201810823911 A CN201810823911 A CN 201810823911A CN 108880758 A CN108880758 A CN 108880758A
- Authority
- CN
- China
- Prior art keywords
- channel
- filter
- code modulation
- iterative receiver
- design
- 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.)
- Pending
Links
Classifications
-
- 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
- H04L1/0045—Arrangements at the receiver end
- H04L1/0047—Decoding adapted to other signal detection operation
- H04L1/005—Iterative decoding, including iteration between signal detection and decoding operation
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The iterative receiver algorithm for design of difference chaotic bit weaving code modulation system, the coded modulation being related in wireless communication.Nonlinear M yriad filter is used first carries out baseband filtering, filter coefficient carries out dynamic adjustment according to the severity of impulse disturbances in channel, and it is continued for filter task using sliding window, impulsive noise is mitigated to signal bring severe jamming with this；Then filtering is exported and is sent into iterative receiver, i.e., there are iterative operation between receiving end demodulator and decoder, the influence of remaining impulsive noise and intersymbol interference can eliminated, bring comprehensive performance improvement to system.The result shows that, constellation base difference chaotic bit weaving code modulation system with iterative receiver has excellent performance under power line channel, simultaneously, compared to traditional coherent spread spectrum system, the system does not need additional high-precision quasi- channel estimator and anti-multipath equipment, has lower complexity and stronger robustness.
Description
Technical field
The present invention relates to the coded modulations in wireless communication, more particularly, to difference chaotic bit weaving code modulation system
Iterative receiver algorithm for design.
Background technique
The aperiodicity of chaotic signal, noise-like characteristic, low autocorrelation performance and inherent spread spectrum nature make its often by with
Make carrier wave transmitting digital information.It is similar with other band spectrum modulation systems as a kind of outstanding chaotic signal, difference chaotic displacement
Keying (Differential Chaos Shift Keying, DCSK) has very strong anti-multipath fading ability and very high
Communications security.However, causing the data of binary system DCSK system since the half-bit period is used to transmission of reference signals
Rate and energy efficiency reduce.
In DCSK system, transmission reliability can be improved by appropriate channel coding and reduces power consumption, it is such as low close
Spend parity check code (Low Density Parity Check Codes, LDPC), product accumulates code (Product
Accumulate Codes, PAC) and grid code (Trellis Codes, TC).The Walsh base M member DCSK system of LDPC coding
The proposition of iterative receiver (Iterative Receiver, IR) show that the design can reduce power consumption and improve short frame length
Under the conditions of system performance.
For trade off bandwidth efficiency and power loss under fading channel, there is Bit Interleaved Coded Modulation (Bit-
Interleaved Coded Modulation, BICM) technology.Later, LDPC code is applied to BICM system and proposes phase
Variable degree matching mapping (Variable Degree Matched Mapping, the VDMM) mapping scheme answered.It mentions on this basis
Constellation base difference chaotic Bit Interleaved Coded Modulation (Differential Chaotic BICM, DC-BICM) system out, and
Traditional Direct Sequence Spread Spectrum (Direct Sequence-Spread Spectrum, DS-SS) system is compared, and is had lower
Complexity and better robustness.
In recent years, it in order to realize reliable digital communication on power line (Power Line Channels, PLC), studies
Persons have conducted extensive research.It is more densely distributed than other communication networks that this is primarily due to power line network, therefore can establish
One convenience, cheap telecommunication media.However, the reliable communication on power line is one huge for system designers
Challenge.In general, power line can be influenced by different types of interference, including the intersymbol interference as caused by multipath transmisstion
The decaying of signal caused by (Intersymbol Interference, ISI), cable loss and various types of impulsive noises.
Especially impulsive noise occurs since it is random, and the duration is short, it will greatly influence system performance.
When using DCSK Transmission system under PLC channel, as a result, it has been found that, DCSK included anti-multipath fading ability and
The accurately characteristics such as channel estimation are not needed, are made it have than direct sequence differential phase shift keying (Direct
Sequence- Differential Phase Shift Keying, DS-DPSK) and direct sequence CDMA (Direct
Sequence-Code Division Multiple Access, DS-CDMA) the better robustness of system, but impulsive noise according to
It is old to significantly reduce its system performance.
Bibliography：
[1]Y.Lyu,L.Wang,G.Cai,G.R.Chen,“Iterative receiver for M-ary DCSK
systems,”IEEE Trans.Commun.,vol.63,no.11,pp.3929-3936,Nov.2015.
[2]J.Zhan,L.Wang,M.Katz and G.Chen,“A Differential Chaotic Bit-
Interleaved Coded Modulation System Over Multipath Rayleigh Channels,”in IEEE
Transactions on Communications, vol.65,no.12,pp.5257-5265,Dec.2017.
[3]G.Kaddoum and N.Tadayon,“Differential Chaos Shift Keying:A Robust
Modulation Scheme for Power Line Communications,”in IEEE Transactions on
Circuits and Systems II: Express Briefs,vol.64,no.1,pp.31-35,Jan.2017.
Summary of the invention
It is an object of the invention to be directed to existing difference chaotic Bit Interleaved Coded Modulation (DC-BICM) system in PLC
The bad problem of performance under channel provides and realizes that the difference chaotic bit of good transmission performance is handed over lower power consumption and complexity
Knit iterative receiver (DC-BICM-IR) algorithm for design of code modulation system.
The present invention includes the following steps：
1) digital signal generator generates binary source bit W, encodes by binary LDPC and punctured, and VDMM intertexture is reflected
After penetrating, transmitter output symbol S is become by the mapping of M member DCSK modulator, symbol S passes through power line channel (PLC), accorded with
The influence of (ISI) and impulsive noise is interfered between number.
2) the reception signal Y of receiver obtains filtered output signals Y* by Myriad filter process；
3) filtered output signals Y* obtains judgment variables z' and calculates channel likelihood by incoherent M member DCSK demodulator
Value LZ(i), filtered output signals Y* is iterated decoding by the Soft Inform ation interchange process between de-mapping device and decoder.
In step 1), LDPC encoder is cascaded with M member DCSK modulator by VDMM interleaver, change coded-bit with
The mapping relations of modulation constellation, for the side distribution of different LDPC protograph structures and constellation figure grade, mutual information characteristic
Difference, the alternative interleaving mode of VDMM is different, and system performance is different.
In step 2), the receiver is to each symbol acquisition NSαSThe input of a sample, Myriad filter is expressed as
yn(i) (i=1,2 ..., NSαS), output is given by, and wherein ρ is location parameter, K be Myriad filter ratio because
Son：
Filter coefficient carries out dynamic adjustment according to the severity of impulse disturbances in channel, and constantly using sliding window
It is filtered task, impulsive noise is mitigated to signal bring severe jamming with this.
In step 3), demodulation-decoding iteration receiver passes through during the work time to be realized between decoder and demodulator
The exchange of Soft Inform ation, further eliminating remaining impulsive noise and intersymbol interference bring influences, and makes the communication of whole system
Quality has comprehensive promotion.
Beneficial effects of the present invention are as follows：
The present invention makes full use of the inherent spread spectrum property of incoherent chaos system, eliminates anti-multipath fading equipment and high-precision
Channel estimating apparatus is spent, and Myriad filter is combined with the advantage of iterative decoder, effectively reduces impulsive noise
And influence of the ISI to system, so that the system is realized good transmission performance with lower power consumption and complexity.
Detailed description of the invention
Fig. 1 is constellation base DC-BICM-IR transmitter composed structure under power line channel；
Fig. 2 is constellation base DC-BICM-IR iterative receiver composed structure under power line channel；
Fig. 3 is existing M member DCSK modulator composed structure；
Fig. 4 is existing M member DCSK demodulator composed structure；
Fig. 5 is the LDPC code protograph of AR4JA pattern；
Fig. 6 is 16 yuan of DCSK modulation constellations；
Fig. 7 is the performance of BER ratio that DC-BICM system used and be not used Myriad filter under power line channel
Compared with, channel characteristics index α=1,1.5,2；
Fig. 8 is that compared with the performance of BER of DC-BICM-IR system, channel characteristics refer to DC-BICM under power line channel
Several α=1,1.5,2；
Fig. 9 is the performance of BER that the DC-BICM-IR system of different VDMM interleaving modes has been used under power line channel
Compare.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Fig. 1 is constellation base DC-BICM-IR transmitter composed structure under power line channel, and specific work process is as follows：Two
System source bits W by binary LDPC coding and it is punctured, after VDMM Bit Interleave, become by M member DCSK modulator
Transmitter emits symbol S.Wherein, M member DCSK modulator composed structure is as shown in figure 3, its specific work process is as follows：Using
Logistic mappingAs chaos signal generator, when work, generates chaos reference signal cx, cxThrough Xi Er
Bert converter is converted to orthogonal signalling cy.Information signal is expressed as ms=ascx+bscy, in formula, s (s=1,2 ..., M) table
Show the symbol in signal constellation (in digital modulation) space, asAnd bsRespectively indicate the real and imaginary parts of symbol s.cxAnd msIt alternately sends and constitutes hair
The number of delivering letters S.
For example, 16 yuan of rectangular constellations of DCSK of Gray label shown in AR4JA code and Fig. 6 using 1/2 code rate shown in Fig. 5
Figure.Under this mapping ruler, there are 24 kinds of possible VDMM intertexture modes.But, it is contemplated that the distribution of the side of protograph structure and
When the mutual information characteristic of constellation figure grade, intertexture mode can be reduced to 4 kinds, be respectively { 2,4,5,1 }, { 5,2, Isosorbide-5-Nitrae },
{ 1,2,4,5 } and { 5,1,2,4 }.Variable node (V by taking { 1,2,4,5 } intertexture mode as an example, in Fig. 5 in AR4JA protograph1,
V2,V4,V5) it will be mapped to signal constellation point (x in Fig. 6 in 16 yuan of DCSK planispheres1x2x3x4), and the transverse and longitudinal of constellation point is sat
Mark is the real part a of symbol ssWith imaginary part bs。
When emitting symbol S by power line channel (PLC), the interference by ISI and impulsive noise.We are by noise sample
ωnIt is modeled as steady (the S α S) stochastic variable of symmetrical α, characteristic function is expressed asWherein,
α (0≤α≤2) is characteristic index, and the smaller expression impulsive noise of α is more serious；δ ∈ (- ∞ ,+∞) is location parameter, it can see
Make the mean value or intermediate value being distributed；γ (γ >=0) illustrates dispersion degree, is similar to the variance of Gaussian Profile.
Fig. 2 is constellation base DC-BICM-IR iterative receiver composed structure under power line channel, and specific work process is such as
Under：After receiver receives signal Y, filtered output signals Y* is obtained by Myriad filter process, later, Y* is by incoherent
M member DCSK demodulator obtains judgment variables z' and calculates channel likelihood value LZ(i).Finally, signal is by de-mapping device and translates
Soft Inform ation interchange process between code device is iterated decoding.Variables L in figureZ(i), LEa(i), LEP(i), LEe(i), LDa(j),
LDP(j), LDe(j) log-likelihood (LLRs) is indicated.Wherein, M member DCSK demodulator composed structure is as shown in figure 4, it is specific
The course of work is as follows：Filtering signal Y* is separated into the reference signal by noise pollutionWith information signalBy Martin Hilb
Spy's transformation is changed into orthogonal signallingLater, judgment variables z (z is calculateda,zb), whereinIt is assumed that
The channel state information of estimation isIt does not need to remove to estimate each channel parameter as the channel estimation of coherent communication system,
And only need to obtain the sum of channel power value, i.e.,So, new judgment variables are
The core of iterative receiver is exchanging for Soft Inform ation between demodulator and decoder, wherein uses Gaussian approximation
Method calculates the log-likelihood of i-th of transmitting bit.According to the above course of work, the judgment variables z' of M member DCSK demodulator output
(za',zb') component za' and zb' approximation Gaussian distributed, mean valueVariance
Wherein,It is average symbol energy,It is the variance of Gaussian noise, is equal to S α S parameter γ
Twice.Therefore, for m-th of modulation symbol (as,bs) (m=0,1 ..., M-1), z'(za',zb') conditional probability it is close
Degree function (Probability Density Function, PDF) can be expressed as：
Therefore, the LLR of i-th of transmission bit is represented by：
ci(m) be according to VDMM rule interweave mapping after m-th of modulation symbol i-th of bit.P (m) indicates m-th of symbol
Number prior probability.Before iterative process starts, it is initialized as P (m)=1/M.
As shown in Figure 2, de-mapping device receives the channel likelihood value L that band is made an uproarZ(i) coded-bit provided with decoder
External prior information LEa(i) after, the channel and external information L of i-th of interleaved coded bits are calculatedEP(i)。
It is that iteration is provided before the input information of current iteration should not include using an important rule of iteration theorem
Information.Therefore, in the likelihood information L for exporting de-mapping deviceEP(i) it inputs before decoder, the iteration before is needed to generate
Priori likelihood information LEa(i) it therefrom removes, to obtain LEe(i), i.e.,
LEe(i)=LEP(i)-LEa(i) (4)
In first calculate, therefore system simultaneously enables L without prior informationEa(i)=0 and assume to send symbol be it is equal generally
Rate. LEe(i) become the priori input L of external ldpc decoder (using BP algorithm) by deinterleavingDa(j), it then, decodes
The external information L of device calculating exports coding bitDP(j)。
Similarly, decoder prior information LDa(j) it needs before intertexture from LDP(j) it is removed in：
LDe(j)=LDP(j)-LDa(j) (5)
External information LDe(j) interweaving again is LEa(i) internal de-mapping device is fed back to after, L at thisEa(i) it is used as new one
Take turns the priori knowledge of iterative decoding.The prior probability of symbol calculates as follows：
Wherein,And p (ci(m)=1)=1-p (ci(m)=0).
Iterative process can be repeated as many times until meeting selected termination criteria.Finally, provided using ldpc decoder
LDP(j) source bits are estimated
Difference chaotic bit weaving code modulation system under a kind of power line channel that the present invention introduces based on constellation
Iterative receiver (DC-BICM-IR) algorithm for design.In order to preferably illustrate its validity, some Computer Simulations are shown herein
As a result.Transmission system parameters make following setting：Chaos spread spectrum factor-beta=64, LDPC code long n=500, code rate R=1/2 are maximum
Turbo number of iterations is set as 10, and the local number of iterations of maximum ldpc decoder is set as 50.PLC channel parameter makees following setting：
Characteristic index α=1,1.5,2, multipath number L=3, decay factorDelay, τ1=
0,τ2=2, τ3=5.
Fig. 7 is provided under power line channel, and DC-BICM system uses and be not used the performance of BER of Myriad filter
Compare.Channel characteristics index α=1,1.5,2, using { 1,2,4,5 } VDMM interleaving mode.It can be seen from the figure that in α=1,
When 1.5, due to the interference of impulsive noise, current verification is heavily polluted with system information, is brought to decoder serious
Error message results in the paralysis of system.The introducing of Myriad filter greatly weakens the influence of impulsive noise, so that being
System remains to work normally under some rugged environments when (such as α=1,1.5).
Fig. 8 is provided under power line channel, and for DC-BICM compared with the performance of BER of DC-BICM-IR system, channel is special
Levy index α=1,1.5,2；Using { 1,2,4,5 } VDMM interleaving mode.It can be found that in BER=10-6In the case where, compared to
DC-BICM system, DC-BICM-IR system have the coding gain of about 0.4~0.5dB, which is hardly referred to by channel characteristics
The influence of number α, i.e., no matter the impulse noise interference of channel seriously whether, system can provide a metastable iteration and increase
Benefit.
Fig. 9 is provided under power line channel, has used the bit error rate of the DC-BICM-IR system of different VDMM interleaving modes
Performance compares.VDMM mode has { 2,4,5,1 }, { 5,2,1,4 }, { 1,2,4,5 } and { 5,1,2,4 } four kinds.It can from figure
Out, the iteration gain of DC-BICM-IR system is influenced very big by VDMM mode, and the poorer mode iteration gain of basic property is more
Greatly.In BER=10-6In the case where, the iteration gain of { 5,1,2,4 } has reached maximum 0.6dB.
The basic principles, main features and advantages of the present invention have been shown and described above.One kind of the invention
The iterative receiver algorithm for design of constellation base difference chaotic bit weaving code modulation system takes full advantage of under power line channel
The inherent spread spectrum property of incoherent chaos system, eliminates anti-multipath fading equipment and high-precision channel estimating apparatus, and will
Myriad filter is combined with the advantage of iterative decoder, effectively reduces the influence of impulsive noise and ISI to system,
The system is set to realize good transmission performance with lower power consumption and complexity.
The present invention uses Nonlinear M yriad filter first and carries out baseband filtering, and filter coefficient is according to channel middle arteries
The severity of punching interference carries out dynamic adjustment, and is continued for filter task using sliding window, mitigates pulse with this and makes an uproar
Sound is to signal bring severe jamming；Then filtering is exported and is sent into iterative receiver, i.e., in receiving end demodulator and decoder
Between there are iterative operation, which can further eliminate the influence of remaining impulsive noise and intersymbol interference, give system band
Carry out comprehensive performance improvement.The result shows that the constellation base difference chaotic bit weaving code modulation system with iterative receiver
There is excellent performance under power line channel, meanwhile, compared to traditional coherent spread spectrum system, which does not need additional high-precision
Quasi- channel estimator and anti-multipath equipment have lower complexity and stronger robustness.
Claims (4)
1. the iterative receiver algorithm for design of difference chaotic bit weaving code modulation system, it is characterised in that including following step
Suddenly：
1) digital signal generator generates binary source bit W, by binary LDPC coding and punctured, VDMM intertexture mapping
Afterwards, transmitter output symbol S is become by the mapping of M member DCSK modulator, symbol S passes through power line channel, dry by intersymbol
It disturbs and the influence of impulsive noise；
2) the reception signal Y of receiver obtains filtered output signals Y* by Myriad filter process；
3) filtered output signals Y* obtains judgment variables z' and calculates channel likelihood value L by incoherent M member DCSK demodulatorZ
(i), filtered output signals Y* is iterated decoding by the Soft Inform ation interchange process between de-mapping device and decoder.
2. the iterative receiver algorithm for design of difference chaotic bit weaving code modulation system as described in claim 1, feature
It is in step 1), LDPC encoder is cascaded with M member DCSK modulator by VDMM interleaver, and coded-bit and modulation are changed
The mapping relations of planisphere, for the side distribution of different LDPC protograph structures and constellation figure grade, mutual information characteristic is different,
The alternative interleaving mode of VDMM is different, and system performance is different.
3. the iterative receiver algorithm for design of difference chaotic bit weaving code modulation system as described in claim 1, feature
It is in step 2), the receiver is to each symbol acquisition NSαSThe input of a sample, Myriad filter is expressed as yn
(i) (i=1,2, Λ, NSαS), output is given by, and wherein ρ is location parameter, K be Myriad filter ratio because
Son：
Filter coefficient carries out dynamic adjustment according to the severity of impulse disturbances in channel, and is continued for using sliding window
Filter task mitigates impulsive noise to signal bring severe jamming with this.
4. the iterative receiver algorithm for design of difference chaotic bit weaving code modulation system as described in claim 1, feature
It is in step 3), demodulation-decoding iteration receiver passes through during the work time realizes soft letter between decoder and demodulator
The exchange of breath, further eliminating remaining impulsive noise and intersymbol interference bring influences, and makes the communication quality of whole system
There is comprehensive promotion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823911.2A CN108880758A (en) | 2018-07-25 | 2018-07-25 | The iterative receiver algorithm for design of difference chaotic bit weaving code modulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823911.2A CN108880758A (en) | 2018-07-25 | 2018-07-25 | The iterative receiver algorithm for design of difference chaotic bit weaving code modulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108880758A true CN108880758A (en) | 2018-11-23 |
Family
ID=64305152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810823911.2A Pending CN108880758A (en) | 2018-07-25 | 2018-07-25 | The iterative receiver algorithm for design of difference chaotic bit weaving code modulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108880758A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003804A (en) * | 2020-09-03 | 2020-11-27 | 厦门大学 | Multipath multivariate differential chaotic shift keying iterative receiving method |
| CN113660064A (en) * | 2021-09-15 | 2021-11-16 | 沈阳飞机设计研究所扬州协同创新研究院有限公司 | Multi-data-packet-based joint two-dimensional interleaving coding method suitable for power line communication system |
| CN116055272A (en) * | 2023-03-03 | 2023-05-02 | 集美大学 | Short code design method of differential chaotic bit interleaved coding system for underwater acoustic communication |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588817A (en) * | 2004-07-28 | 2005-03-02 | 厦门大学 | Frequency-hopping spectrum-expanding communication system based on difference chaotic frequency modulation |
| CN104009834A (en) * | 2014-04-22 | 2014-08-27 | 重庆邮电大学 | MIMO secret communication method based on differential chaos shift keying |
| CN106209712A (en) * | 2016-06-22 | 2016-12-07 | 厦门大学 | Difference chaotic shift keying modulation demodulating equipment based on the modulation of code subscript |
| CN106549894A (en) * | 2016-11-18 | 2017-03-29 | 厦门大学 | The code multiplexing difference chaotic modem of combination code subscript modulation |
| CN106817330A (en) * | 2017-02-04 | 2017-06-09 | 厦门大学 | The multi-system difference chaotic shift keying modulation demodulator of combination code subscript modulation |
-
2018
- 2018-07-25 CN CN201810823911.2A patent/CN108880758A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588817A (en) * | 2004-07-28 | 2005-03-02 | 厦门大学 | Frequency-hopping spectrum-expanding communication system based on difference chaotic frequency modulation |
| CN104009834A (en) * | 2014-04-22 | 2014-08-27 | 重庆邮电大学 | MIMO secret communication method based on differential chaos shift keying |
| CN106209712A (en) * | 2016-06-22 | 2016-12-07 | 厦门大学 | Difference chaotic shift keying modulation demodulating equipment based on the modulation of code subscript |
| CN106549894A (en) * | 2016-11-18 | 2017-03-29 | 厦门大学 | The code multiplexing difference chaotic modem of combination code subscript modulation |
| CN106817330A (en) * | 2017-02-04 | 2017-06-09 | 厦门大学 | The multi-system difference chaotic shift keying modulation demodulator of combination code subscript modulation |
Non-Patent Citations (5)
| Title |
|---|
| GEORGES KADDOUM等: "Differential Chaos Shift Keying: A Robust Modulation Scheme for Power-Line Communications", 《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS—II: EXPRESS BRIEFS》 * |
| JIA ZHAN, LIN WANG等: "A Differential Chaotic Bit-Interleaved Coded Modulation System Over Multipath Rayleigh Channels", 《IEEE TRANSACTIONS ON COMMUNICATIONS》 * |
| PING YANG等: "An Improved Hybrid Turbo Equalizer for Single Carrier Transmission with Impulsive Noise and ISI", 《IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY》 * |
| THUY VAN NGUYEN: "The Design of Rate-Compatible Protograph LDPC Codes", 《IEEE TRANSACTIONS ON COMMUNICATIONS》 * |
| YIBO LYU, LIN WANG等: "Iterative Receiver for M-ary DCSK Systems", 《IEEE TRANSACTIONS ON COMMUNICATIONS》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003804A (en) * | 2020-09-03 | 2020-11-27 | 厦门大学 | Multipath multivariate differential chaotic shift keying iterative receiving method |
| CN113660064A (en) * | 2021-09-15 | 2021-11-16 | 沈阳飞机设计研究所扬州协同创新研究院有限公司 | Multi-data-packet-based joint two-dimensional interleaving coding method suitable for power line communication system |
| CN113660064B (en) * | 2021-09-15 | 2023-06-16 | 沈阳飞机设计研究所扬州协同创新研究院有限公司 | Multi-data packet-based joint two-dimensional interleaving coding method suitable for power line communication system |
| CN116055272A (en) * | 2023-03-03 | 2023-05-02 | 集美大学 | Short code design method of differential chaotic bit interleaved coding system for underwater acoustic communication |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103841065B (en) | Nonopiate multiple access is sent and joint receives demodulation coding system and method | |
| Barbieri et al. | Time-frequency packing for linear modulations: spectral efficiency and practical detection schemes | |
| Ping et al. | Analysis and design of IDMA systems based on SNR evolution and power allocation | |
| US20110141918A1 (en) | Time division multiplexing method and system | |
| CN106453185B (en) | A kind of IDMA system improved method based on CCSK modulation | |
| CN108880758A (en) | The iterative receiver algorithm for design of difference chaotic bit weaving code modulation system | |
| CN104009822B (en) | Based on new demodulation modification method of the imperfect channel estimation containing arrowband interference | |
| Zhan et al. | A differential chaotic bit-interleaved coded modulation system over multipath Rayleigh channels | |
| CN107612861B (en) | IDMA system communication method based on CCSK modulation | |
| CN114301495A (en) | Soft output demodulation method under incoherent LoRa system | |
| CN106452652B (en) | A kind of MPI suppression method based on chaos wireless communication system | |
| WO2006066445A1 (en) | A encoding modulation and demodulation system and its method of transmitting and receiving signal | |
| CN113037298B (en) | System and method for filling interference information based on low-code-rate LDPC code | |
| CN103580721A (en) | Multi-antenna iteration multi-user detection method and device in complex time varying multi-path channel | |
| CN110445554B (en) | Non-coherent underwater acoustic communication method and system based on actual channel fading statistics | |
| CN109639301B (en) | Confidence estimation-based FTN (fiber to the home) equalization method | |
| CN102882654A (en) | Encoding constraint and probability calculation based encoding and decoding synchronization method | |
| CN104104418A (en) | High transmission rate and bandwidth utilization rate of MIMO Multi-h CPM wireless communication method | |
| Zhu et al. | DPI DCSK modulation with BCJR decoding | |
| Ngo et al. | Non-coherent cooperative communications dispensing with channel estimation relying on erasure insertion aided Reed-Solomon coded SFH M-ary FSK subjected to partial-band interference and Rayleigh fading | |
| Gandhi et al. | Wavelets for baseband coding of waveforms | |
| Cui et al. | Iterative receiver for the triple differential PSK modulation in the time‐varying underwater acoustic communications | |
| Zhao et al. | Link-by-link coded physical layer network coding on impulsive noise channels | |
| Guo et al. | Multi-user detection techniques for potential 3GPP long term evolution (LTE) schemes | |
| Manzoor et al. | DDT-based chaotic interleaver aided cooperative OFDM system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181123 |
|
| RJ01 | Rejection of invention patent application after publication |