CN114584180B - Transmitting end, receiving end, system and method for power line communication - Google Patents
Transmitting end, receiving end, system and method for power line communication Download PDFInfo
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- CN114584180B CN114584180B CN202210199189.6A CN202210199189A CN114584180B CN 114584180 B CN114584180 B CN 114584180B CN 202210199189 A CN202210199189 A CN 202210199189A CN 114584180 B CN114584180 B CN 114584180B
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- 238000004891 communication Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000013507 mapping Methods 0.000 claims description 4
- 108010003272 Hyaluronate lyase Proteins 0.000 claims description 3
- 238000007476 Maximum Likelihood Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0014—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the source coding
Abstract
The invention relates to the technical field of power communication, and discloses a transmitting end, a receiving end, a system and a method of power line communication. The invention carries out source coding and probability distribution matching on a transmitting signal through a transmitting end to obtain a corresponding digital signal with Maxwell-Boltzmann distribution, codes the digital signal and transmits the digital signal to a power line channel in a pulse form, and a receiving end decodes the transmitted pulse signal and carries out signal recovery on the decoded signal. The invention uses the pulse signal to transmit the signal, uses the extremely high time domain resolution to resist the serious multipath effect of the power line channel, and can reduce the communication error rate by probability shaping the amplitude of the transmitted signal, thereby realizing reliable and efficient power communication.
Description
Technical Field
The present invention relates to the field of power communication technologies, and in particular, to a transmitting end, a receiving end, a system and a method for power line communication.
Background
The power line communication technology uses the existing power line as a communication medium, and transmits data information or voice information in the form of a carrier wave, which is a unique communication mode in the power field.
Because the power line is designed for data transmission, the power line channel generates multipath effect when the power line is used for data transmission, and has higher communication error rate in the aspect of data transmission.
Disclosure of Invention
The invention provides a transmitting end, a receiving end, a system and a method of power line communication, which solve the technical problems of multipath effect of a power line channel and high communication error rate of the existing power line communication technology.
A first aspect of the present invention provides a transmitting end of power line communication, including:
the distribution matcher is used for carrying out source coding and probability distribution matching on the transmitted signals to obtain corresponding digital signals with Maxwell-Boltzmann distribution;
the encoder is used for carrying out channel coding on the digital signal to obtain a coded signal;
and the pulse amplitude modulator is used for transmitting a pulse signal to the power line channel according to the amplitude of the coded signal.
According to one implementation manner of the first aspect of the present invention, the distribution matcher is specifically configured to:
and performing source coding on the transmission signal by adopting arithmetic coding, shannon coding, huffman coding or Fisher coding.
According to one implementation manner of the first aspect of the present invention, the distribution matcher is specifically configured to:
and carrying out probability distribution matching on the transmission signals by adopting a constant component distribution technology so as to realize source coding mapping from the transmission signals to preset probability distribution.
According to one manner of realisation of the first aspect of the invention, the maxwell-boltzmann distribution is:
wherein the method comprises the steps of
In the method, in the process of the invention,represents x i M represents the digital signal order, X v Representing the transmitted signal x i Representing the mapped ith digital signal, A v Representing the normalized coefficient of the mapped digital signal, v representing the spreading factor.
According to one possible implementation of the first aspect of the present invention, the encoder is specifically configured to:
and carrying out channel coding on the digital signal by adopting low-density parity check coding.
A second aspect of the present invention provides a receiving end of power line communication, including:
the pulse amplitude demodulator is used for receiving the pulse signal transmitted by the pulse amplitude modulator through the power line channel, and carrying out pulse amplitude demodulation on the pulse signal to obtain a corresponding digital signal;
the decoder is used for carrying out channel decoding on the digital signals to obtain decoded signals;
and the inverse distribution matcher is used for carrying out information source decoding and inverse probability distribution matching on the decoded signals so as to recover the sending signals corresponding to the pulse signals.
According to one manner in which the second aspect of the invention can be implemented, the pulse amplitude demodulator is specifically configured to:
the pulse signal is pulse amplitude demodulated based on a maximum likelihood criterion and a maximum a posteriori probability criterion.
A third aspect of the present invention provides a power line communication system comprising:
a transmitting end of the power line communication according to any one of the above-described modes;
a power line channel;
and a receiving end of the power line communication according to any one of the above-mentioned modes.
A fourth aspect of the present invention provides a transmission method of power line communication, including:
performing source coding and probability distribution matching on the transmitted signals to obtain corresponding digital signals with Maxwell-Boltzmann distribution;
channel coding is carried out on the digital signal to obtain a coded signal;
and transmitting a pulse signal to a power line channel according to the amplitude of the coded signal.
A fifth aspect of the present invention provides a receiving method of power line communication, including:
receiving a pulse signal transmitted by a pulse amplitude modulator through a power line channel, and performing pulse amplitude demodulation on the pulse signal to obtain a corresponding digital signal;
channel decoding is carried out on the digital signals to obtain decoded signals;
and performing source decoding and inverse probability distribution matching on the decoded signals to recover the transmission signals corresponding to the pulse signals.
From the above technical scheme, the invention has the following advantages:
the invention carries out source coding and probability distribution matching on a transmitting signal through a transmitting end to obtain a corresponding digital signal with Maxwell-Boltzmann distribution, codes the digital signal and transmits the digital signal to a power line channel in a pulse form, and a receiving end decodes the transmitted pulse signal and carries out signal recovery on the decoded signal; the embodiment of the invention utilizes the pulse signal to transmit the signal, and utilizes the extremely high time domain resolution to resist the serious multipath effect of the power line channel, and can reduce the communication error rate by carrying out probability shaping on the amplitude of the transmitted signal, thereby realizing reliable and efficient power communication.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a block diagram illustrating a structural connection of a power line communication system according to an alternative embodiment of the present invention;
fig. 2 is a flowchart of a transmission method of power line communication according to an alternative embodiment of the present invention;
fig. 3 is a flowchart of a receiving method of power line communication according to an alternative embodiment of the present invention.
Reference numerals:
1-a transmitting end; 2-powerline channel; 3-a receiving end; 11-a distribution matcher; 12-an encoder; 13-pulse amplitude modulator; 31-pulse amplitude demodulator; a 32-decoder; 33-inverse distribution matcher.
Detailed Description
The embodiment of the invention provides a sending end, a receiving end, a system and a method for power line communication, which are used for solving the technical problems of multipath effect of a power line channel and high communication error rate of the existing power line communication technology.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 shows a block diagram of structural connection of a power line communication system according to an embodiment of the present invention.
The invention provides a power line communication system, which comprises a transmitting end 1, a power line channel 2 and a receiving end 3.
The transmitting end 1 comprises a distribution matcher 11, an encoder 12 and a pulse amplitude modulator 13 which are connected in sequence.
In a specific implementation manner, the distribution matcher 11 is configured to perform source coding and probability distribution matching on the transmission signal, so as to obtain a corresponding digital signal with maxwell-boltzmann distribution. The encoder 12 is configured to perform channel coding on the digital signal to obtain a coded signal. The pulse amplitude modulator 13 is arranged to send a pulse signal to the power line channel 2 in dependence on the amplitude of the encoded signal.
The receiving end 3 comprises a pulse amplitude demodulator 31, a decoder 32 and an inverse distribution matcher 33 which are connected in sequence.
In a specific implementation manner, the pulse amplitude demodulator 31 is configured to receive a pulse signal transmitted by the pulse amplitude modulator 13 through the power line channel 2, and perform pulse amplitude demodulation on the pulse signal to obtain a corresponding digital signal; the decoder 32 is configured to perform channel decoding on the digital signal to obtain a decoded signal; the inverse distribution matcher 33 is configured to perform source decoding and inverse probability distribution matching on the decoded signal, which are inverse to the operation of the distribution matcher 11, to recover the transmission signal.
The source code used by the distribution matcher 11 is arithmetic code, shannon code, huffman code or feuno code.
As one way that can be achieved, the distribution matcher 11 performs probability distribution matching on the transmission signal using a constant component distribution technique (Constant Composition Distribution Matching, CCDM) to achieve source code mapping of the transmission signal to a preset probability distribution. The maxwell-boltzmann distribution is:
wherein the method comprises the steps of
In the method, in the process of the invention,represents x i M represents the digital signal order, X v Representing the transmitted signal x i Representing the mapped ith digital signal, A v Representing the normalized coefficient of the mapped digital signal, v representing the spreading factor.
In this embodiment, probability distribution matching is performed by adopting a constant component distribution technology, so that a transmission signal is converted into a digital signal with maxwell-boltzmann distribution, which is beneficial to improving the average distance between a signal and constellation points in a constellation diagram, thereby reducing the communication error rate.
As one way that can be achieved, the encoder 12 uses low density parity check coding when channel coding the digital signal.
In this embodiment, the low-density parity check code is used for channel coding, so that the decoding operation of the subsequent receiving end 3 can be facilitated.
As one possible way, the pulse amplitude demodulator 31 demodulates the pulse amplitude of the pulse signal based on the maximum likelihood criterion and the maximum a posteriori probability criterion.
Based on the transmitting terminal 1 of the above embodiment, the present invention also provides a transmitting method of power line communication, which is performed by the transmitting terminal 1.
Referring to fig. 2, fig. 2 shows a flowchart of a transmission method of power line communication according to an embodiment of the present invention.
The sending method of the power line communication provided by the embodiment of the invention comprises the following steps:
step S1, performing source coding and probability distribution matching on a transmitted signal to obtain a corresponding digital signal with Maxwell-Boltzmann distribution;
s2, carrying out channel coding on the digital signal to obtain a coded signal;
step S3, a pulse signal is sent to the power line channel 2 according to the amplitude of the encoded signal.
Based on the transmitting end 1 of the above embodiment, the present invention also provides a receiving method of power line communication, which is performed by the receiving end 3.
Referring to fig. 3, fig. 3 is a flowchart illustrating a receiving method of power line communication according to an embodiment of the present invention.
The receiving method for the power line communication provided by the embodiment of the invention comprises the following steps:
step S10, receiving a pulse signal transmitted by the pulse amplitude modulator 13 through the power line channel 2, and performing pulse amplitude demodulation on the pulse signal to obtain a corresponding digital signal;
step S20, carrying out channel decoding on the digital signal to obtain a decoded signal;
and step S30, performing source decoding and inverse probability distribution matching on the decoded signals to recover the transmission signals corresponding to the pulse signals.
According to the embodiment of the invention, the transmitting end 1 carries out source coding and probability distribution matching on the transmitting signal to obtain a corresponding digital signal with Maxwell-Boltzmann distribution, the digital signal is coded and transmitted to the power line channel 2 in a pulse form, the receiving end 3 decodes the transmitted pulse signal, and the decoded signal is subjected to signal recovery; the embodiment of the invention utilizes the pulse signal to transmit the signal, and utilizes the extremely high time domain resolution to resist the serious multipath effect of the power line channel, and can reduce the communication error rate by carrying out probability shaping on the amplitude of the transmitted signal, thereby realizing reliable and efficient power communication.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A transmitting end of power line communication, comprising:
the distribution matcher is used for carrying out source coding and probability distribution matching on the transmitted signals to obtain corresponding digital signals with Maxwell-Boltzmann distribution;
an encoder for performing channel coding on the digital signal by adopting low-density parity check coding to obtain a coded signal;
a pulse amplitude modulator for transmitting a pulse signal to a power line channel according to the amplitude of the encoded signal;
the distribution matcher is specifically used for carrying out probability distribution matching on the transmission signals by adopting a constant component distribution technology so as to realize source coding mapping from the transmission signals to preset probability distribution.
2. The transmitting end of power line communication according to claim 1, wherein the distribution matcher is specifically configured to:
and performing source coding on the transmission signal by adopting arithmetic coding, shannon coding, huffman coding or Fisher coding.
3. The transmitting end of power line communication according to claim 1, wherein the maxwell-boltzmann distribution is:
；
wherein the method comprises the steps of
；
In the method, in the process of the invention,representation->Probability of->Representing the digital signal order,/->Representing the transmitted signal->Representing mapped ∈th>Digital signal,/->Normalized coefficient representing mapped digital signal, +.>Representing the spreading factor.
4. A power line communication system comprising the transmitting end of the power line communication of any one of claims 1-3, a power line channel, and a receiving end, the receiving end comprising:
the pulse amplitude demodulator is used for receiving the pulse signal transmitted by the pulse amplitude modulator through the power line channel, and carrying out pulse amplitude demodulation on the pulse signal to obtain a corresponding digital signal;
the decoder is used for carrying out channel decoding on the digital signals to obtain decoded signals;
and the inverse distribution matcher is used for carrying out information source decoding and inverse probability distribution matching on the decoded signals so as to recover the sending signals corresponding to the pulse signals.
5. The power line communication system according to claim 4, wherein the pulse amplitude demodulator is specifically configured to:
the pulse signal is pulse amplitude demodulated based on a maximum likelihood criterion and a maximum a posteriori probability criterion.
6. A transmission method of power line communication, comprising:
performing source coding on the transmission signal and performing probability distribution matching by adopting a constant component distribution technology to realize source coding mapping from the transmission signal to preset probability distribution, so as to obtain a corresponding digital signal with Maxwell-Boltzmann distribution;
performing channel coding on the digital signal by adopting low-density parity check coding to obtain a coded signal;
and transmitting a pulse signal to a power line channel according to the amplitude of the coded signal.
7. A reception method of power line communication, characterized by being applied to the power line communication system of claim 4, the method comprising:
receiving a pulse signal transmitted by a pulse amplitude modulator through a power line channel, and performing pulse amplitude demodulation on the pulse signal to obtain a corresponding digital signal;
channel decoding is carried out on the digital signals to obtain decoded signals;
and performing source decoding and inverse probability distribution matching on the decoded signals to recover the transmission signals corresponding to the pulse signals.
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|---|---|---|---|---|
| CN111030783A (en) * | 2019-12-27 | 2020-04-17 | 华侨大学 | Data transmission method and system for bit interleaving combined source-channel coding modulation |
| CN111224690A (en) * | 2020-02-28 | 2020-06-02 | 上海交通大学 | Ubiquitous power Internet of things communication system based on MIMO |
| WO2021166203A1 (en) * | 2020-02-21 | 2021-08-26 | 三菱電機株式会社 | Error correction encoding device, error correction encoding method, error correction device, error correction method, communication method, optical communication system, and soft decision error correction frame data structure |
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| US6496104B2 (en) * | 2000-03-15 | 2002-12-17 | Current Technologies, L.L.C. | System and method for communication via power lines using ultra-short pulses |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030783A (en) * | 2019-12-27 | 2020-04-17 | 华侨大学 | Data transmission method and system for bit interleaving combined source-channel coding modulation |
| WO2021166203A1 (en) * | 2020-02-21 | 2021-08-26 | 三菱電機株式会社 | Error correction encoding device, error correction encoding method, error correction device, error correction method, communication method, optical communication system, and soft decision error correction frame data structure |
| CN111224690A (en) * | 2020-02-28 | 2020-06-02 | 上海交通大学 | Ubiquitous power Internet of things communication system based on MIMO |
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| 彭家昕等.基于算数编码的概率星座整形技术的研究.网络新媒体技术.2020,第9卷(第3期),第35-42页. * |
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