CN114598357B - Probability shaping communication method and device based on power constraint of power line communication system - Google Patents

Probability shaping communication method and device based on power constraint of power line communication system Download PDF

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CN114598357B
CN114598357B CN202210199230.XA CN202210199230A CN114598357B CN 114598357 B CN114598357 B CN 114598357B CN 202210199230 A CN202210199230 A CN 202210199230A CN 114598357 B CN114598357 B CN 114598357B
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power
probability
signal
communication system
transmission signal
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CN114598357A (en
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彭志荣
陈钢
邓瑞麒
张峻
黄龙
夏华进
曹威
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Guangdong Power Grid Co Ltd
Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
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Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
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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
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0823—Errors, e.g. transmission errors
    • H04L43/0847—Transmission error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/22—Traffic shaping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/29—Flow control; Congestion control using a combination of thresholds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The invention relates to the technical field of power line communication, and discloses a probability shaping communication method and device based on power constraint of a power line communication system. After setting an initial value of a spreading factor, calculating corresponding maxwell-boltzmann distribution of a transmission signal, determining a corresponding mapped digital signal according to the obtained probability of different signal amplitudes, further determining average power of the transmission signal according to the digital signal, and when the difference value between the average power and the power of a preset communication system is greater than a preset error threshold value, continuously optimizing the value of the spreading factor by using a dichotomy to obtain the optimal maxwell-boltzmann distribution, further mapping the corresponding probability of the transmission signal according to a calculation result, and completing probability shaping of the transmission signal; the invention finds the optimal maxwell-boltzmann distribution by the dichotomy so as to realize the probability shaping of the transmitted signal under the power constraint, thereby being beneficial to improving the communication error rate and realizing reliable and efficient power communication.

Description

Probability shaping communication method and device based on power constraint of power line communication system
Technical Field
The invention relates to the technical field of power line communication, in particular to a probability shaping communication method and device based on power constraint of a power line communication system.
Background
Power line communication is a communication method for data transmission using an existing power line. When the power line is used for data transmission, the problems of multipath effect, signal attenuation, noise interference and the like exist, so that the communication error rate is higher in the power line communication process. Therefore, it is necessary to develop a power line communication scheme capable of reducing the communication error rate.
Disclosure of Invention
The invention provides a probability shaping communication method and device based on power constraint of a power line communication system, which solve the technical problem of high communication error rate of the existing power line communication mode.
The first aspect of the present invention provides a probability shaping communication method based on power constraint of a power line communication system, comprising:
step S1, initializing parameters, wherein the parameters comprise expansion factors;
step S2, calculating maxwell-boltzmann distribution of a transmission signal according to the current value of the expansion factor, determining a corresponding mapped digital signal according to the obtained probability of different signal amplitudes, and determining the average power of the transmission signal according to the mapped digital signal, wherein the maxwell-boltzmann distribution is as follows:
Figure BDA0003526931970000011
wherein x is i Represents the i-th digital signal after mapping, X represents the transmission signal, P X (x i ) Representing the corresponding X after mapping X i M represents the order of the digital signal, A represents the normalized coefficient of the mapped digital signal, and v represents the expansion factor;
step S3, judging whether the difference value between the determined average power and the preset communication system power is larger than a preset error threshold value; if yes, updating the value of the expansion factor by using a dichotomy, and executing the step S2 in a jumping manner; and if not, carrying out corresponding probability mapping on the transmission signal according to the probability of different signal amplitudes obtained currently, and finishing probability shaping of the transmission signal.
According to an implementation manner of the first aspect of the present invention, the determining, according to the mapped digital signal, an average power of the transmission signal includes:
the average power of the transmitted signal is calculated according to the following formula:
Figure BDA0003526931970000021
where w represents the average power of the transmitted signal, and α is the preset signal expansion coefficient.
According to one implementation manner of the first aspect of the present invention, the updating the value of the spreading factor by using a dichotomy includes:
if the average power is greater than the preset communication system power, updating the value of the expansion factor to be
Figure BDA0003526931970000022
If the average power is smaller than the preset communication system power, updating the value of the expansion factor to be
Figure BDA0003526931970000023
According to an implementation manner of the first aspect of the present invention, the mapping the probability of the transmission signal with the probability of the different signal amplitudes obtained currently includes:
and carrying out corresponding probability mapping on the transmission signals according to an equal component distribution technology.
According to one implementation manner of the first aspect of the present invention, the performing the probability shaping on the transmission signal includes:
and carrying out probability shaping on the amplitude and the phase of the transmission signal.
A second aspect of the present invention provides a probability shaping communication device based on power constraint of a power line communication system, comprising:
the initial value setting module is used for initializing parameters, wherein the parameters comprise expansion factors;
the power determining module is configured to calculate maxwell-boltzmann distribution of a transmission signal according to the current value of the spreading factor, determine a corresponding mapped digital signal according to the obtained probability of different signal amplitudes, and determine average power of the transmission signal according to the mapped digital signal, where the maxwell-boltzmann distribution is:
Figure BDA0003526931970000024
wherein x is i Represents the i-th digital signal after mapping, X represents the transmission signal, P X (x i ) Representing the corresponding X after mapping X i M represents the order of the digital signal, A represents the normalized coefficient of the mapped digital signal, and v represents the expansion factor;
the optimizing and probability shaping module is used for judging whether the difference value between the determined average power and the preset communication system power is larger than a preset error threshold value; if yes, updating the value of the expansion factor by using a dichotomy, and jumping to the power determining module; and if not, carrying out corresponding probability mapping on the transmission signal according to the probability of different signal amplitudes obtained currently, and finishing probability shaping of the transmission signal.
According to one implementation manner of the second aspect of the present invention, when the power determining module determines the average power of the transmission signal according to the mapped digital signal, the power determining module is specifically configured to:
the average power of the transmitted signal is calculated according to the following formula:
Figure BDA0003526931970000031
where w represents the average power of the transmitted signal, and α is the preset signal expansion coefficient.
According to one implementation manner of the second aspect of the present invention, when the optimizing and probability shaping module updates the value of the spreading factor by using a dichotomy, the optimizing and probability shaping module is specifically configured to:
if the average power is greater than the preset communication system power, updating the value of the expansion factor to be
Figure BDA0003526931970000032
If the average power is smaller than the preset communication system power, updating the value of the expansion factor to be
Figure BDA0003526931970000033
According to one implementation manner of the second aspect of the present invention, when the optimizing and probability shaping module maps the transmission signal with the probabilities of different signal amplitudes obtained currently, the optimizing and probability shaping module is specifically configured to:
and carrying out corresponding probability mapping on the transmission signals according to an equal component distribution technology.
According to one implementation manner of the second aspect of the present invention, when the optimizing and probability shaping module completes probability shaping of the transmission signal, the optimizing and probability shaping module is specifically configured to:
and carrying out probability shaping on the amplitude and the phase of the transmission signal.
From the above technical scheme, the invention has the following advantages:
after setting an initial value of an expansion factor, calculating corresponding maxwell-boltzmann distribution of a transmission signal, determining a corresponding mapped digital signal according to the obtained probability of different signal amplitudes, further determining average power of the transmission signal according to the digital signal, and continuously optimizing the value of the expansion factor by a dichotomy when the difference value between the average power and the power of a preset communication system is larger than a preset error threshold value so as to obtain the optimal maxwell-boltzmann distribution, and further mapping the corresponding probability of the transmission signal according to a corresponding calculation result to finish probability shaping of the transmission signal; the invention finds the optimal maxwell-boltzmann distribution by the dichotomy so as to realize the probability shaping of the transmitted signal under the power constraint, thereby being beneficial to improving the communication error rate and realizing reliable and efficient power communication.
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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 flowchart of a probability shaping communication method based on power constraint of a power line communication system according to an alternative embodiment of the present invention;
fig. 2 is a schematic diagram of a judgment flow of step S3 in the probabilistic plastic communication method based on power constraint of the power line communication system shown in fig. 1;
fig. 3 is a schematic structural diagram of a probability shaping communication device based on power constraint of a power line communication system according to an alternative embodiment of the present invention.
Reference numerals:
1-an initial value setting module; 2-a power determination module; 3-optimizing and probability shaping module.
Detailed Description
The embodiment of the invention provides a probability shaping communication method and device based on power constraint of a power line communication system, which are used for solving the technical problem of high communication error rate of the existing power line communication mode.
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 flowchart of a probability shaping communication method based on power constraint of a power line communication system according to an embodiment of the present invention.
The invention provides a probability shaping communication method based on power constraint of a power line communication system, which comprises the following steps:
step S1, initializing parameters, wherein the parameters comprise expansion factors.
In one embodiment, when step S1 is performed, the initial value of the spreading factor is set to 0.
And S2, calculating maxwell-boltzmann distribution of a transmission signal according to the current value of the expansion factor, determining corresponding mapped digital signals according to the obtained probabilities of different signal amplitudes, and determining the average power of the transmission signal according to the mapped digital signals.
Wherein the maxwell-boltzmann distribution is:
Figure BDA0003526931970000051
wherein x is i Represents the i-th digital signal after mapping, X represents the transmission signal, P X (x i ) Representing the corresponding X after mapping X i M represents the digital signal order, a represents the normalized coefficient of the mapped digital signal, and v represents the spreading factor.
In one possible way, the average power of the transmitted signal is calculated according to the following equation:
Figure BDA0003526931970000052
where w represents the average power of the transmitted signal, and α is the preset signal expansion coefficient.
The specific values of the preset communication system power, the preset error threshold value and the preset signal expansion coefficient are not unique, and can be set to corresponding values meeting the power line communication requirement. The specific value may be set/invoked when step S1 is performed.
Step S3, judging whether the difference value between the determined average power and the preset communication system power is larger than a preset error threshold value; if yes, updating the value of the expansion factor by using a dichotomy, and executing the step S2 in a jumping manner; and if not, carrying out corresponding probability mapping on the transmission signal according to the probability of different signal amplitudes obtained currently, and finishing probability shaping of the transmission signal.
In specific implementation, as shown in fig. 2, the following determination procedure is performed:
judging |w-w T Whether or not, | > Deltaw is satisfied, where w is the determined average power, w T For presetting communication system power, deltaw is a preset error threshold;
if yes, judge that w is greater than w T Whether or not it is true, if so, updating the value of the expansion factor to be
Figure BDA0003526931970000053
If not, updating the value of the expansion factor to +.>
Figure BDA0003526931970000054
If not, the current value of the expansion factor is directly output.
In one implementation manner, the mapping the probability of the transmission signal with the probability of the different signal amplitudes obtained currently includes:
and carrying out corresponding probability mapping on the transmission signals according to an equal component distribution technology.
Wherein, the equal component distribution technology (Constant Composition Distribution Matching, CCDM) is to match probability distribution of the transmitted signal by adopting a constant component distribution matcher. The technology is the prior art, and the embodiment of the invention does not limit the specific probability mapping process of the constant component distribution matcher.
In one manner that can be implemented, the performing the probability shaping of the transmission signal includes:
and carrying out probability shaping on the amplitude and the phase of the transmission signal.
The invention also provides a probability shaping communication device based on the power constraint of the power line communication system.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a probability shaping communication device based on power constraint of a power line communication system according to an embodiment of the present invention.
The embodiment of the invention provides a probability shaping communication device based on power constraint of a power line communication system, which comprises:
an initial value setting module 1, configured to initialize parameters, where the parameters include a spreading factor;
the power determining module 2 is configured to calculate maxwell-boltzmann distribution of a transmission signal according to the current value of the spreading factor, determine a corresponding mapped digital signal according to the obtained probability of different signal amplitudes, and determine average power of the transmission signal according to the mapped digital signal, where the maxwell-boltzmann distribution is:
Figure BDA0003526931970000061
wherein x is i Represents the i-th digital signal after mapping, X represents the transmission signal, P X (x i ) Representing the corresponding X after mapping X i M represents the order of the digital signal, A represents the normalized coefficient of the mapped digital signal, and v represents the expansion factor;
the optimizing and probability shaping module 3 is used for judging whether the difference value between the determined average power and the preset communication system power is larger than a preset error threshold value; if yes, updating the value of the expansion factor by using a dichotomy, and jumping to the power determining module 2; and if not, carrying out corresponding probability mapping on the transmission signal according to the probability of different signal amplitudes obtained currently, and finishing probability shaping of the transmission signal.
In one implementation manner, when the power determining module 2 determines the average power of the transmission signal according to the mapped digital signal, the power determining module is specifically configured to:
the average power of the transmitted signal is calculated according to the following formula:
Figure BDA0003526931970000062
where w represents the average power of the transmitted signal, and α is the preset signal expansion coefficient.
In one possible implementation, the optimizing and probability shaping module 3 is specifically configured to, when updating the value of the spreading factor by using a dichotomy:
if the average power is greater than the preset communication system power, updating the value of the expansion factor to be
Figure BDA0003526931970000071
If the average power is smaller than the preset communication system power, updating the value of the expansion factor to be
Figure BDA0003526931970000072
In one possible implementation manner, when the optimizing and probability shaping module 3 maps the corresponding probabilities of the transmission signal with the probabilities of different signal amplitudes obtained currently, the optimizing and probability shaping module is specifically configured to:
and carrying out corresponding probability mapping on the transmission signals according to an equal component distribution technology.
In one possible implementation, the optimizing and probability shaping module 3 is specifically configured to:
and carrying out probability shaping on the amplitude and the phase of the transmission signal.
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 (6)

1. A probability shaping communication method based on power constraint of a power line communication system, comprising:
step S1, initializing parameters, wherein the parameters comprise expansion factors;
step S2, calculating maxwell-boltzmann distribution of a transmission signal according to the current value of the expansion factor, determining a corresponding mapped digital signal according to the obtained probability of different signal amplitudes, and determining the average power of the transmission signal according to the mapped digital signal, wherein the maxwell-boltzmann distribution is as follows:
Figure QLYQS_1
in the method, in the process of the invention,
Figure QLYQS_3
representing mapped ∈th>
Figure QLYQS_4
Digital signal,/->
Figure QLYQS_6
Representing the transmitted signal->
Figure QLYQS_7
Representation pair->
Figure QLYQS_8
Mapping the corresponding->
Figure QLYQS_9
Probability of->
Figure QLYQS_10
Representing the digital signal order,/->
Figure QLYQS_2
Normalized coefficient representing mapped digital signal, +.>
Figure QLYQS_5
Representing the spreading factor;
step S3, judging whether the difference value between the determined average power and the preset communication system power is larger than a preset error threshold value; if yes, updating the value of the expansion factor by using a dichotomy, and executing the step S2 in a jumping manner; if not, the probability of the transmission signal is mapped according to the probability of different signal amplitudes obtained at present, and the probability shaping of the transmission signal is completed;
the determining the average power of the transmission signal according to the mapped digital signal includes:
the average power of the transmitted signal is calculated according to the following formula:
Figure QLYQS_11
in the method, in the process of the invention,
Figure QLYQS_12
representing the average power of the transmitted signal,/->
Figure QLYQS_13
Presetting a signal expansion coefficient;
the updating the value of the expansion factor by using a dichotomy comprises:
if the average power is greater than the preset communication system power, updating the value of the expansion factor to be
Figure QLYQS_14
；
If the average workThe rate is smaller than the preset communication system power, and the value of the expansion factor is updated to be
Figure QLYQS_15
。
2. The method for probability shaping communication based on power constraint of power line communication system according to claim 1, wherein said mapping the transmission signal with the probabilities of different signal amplitudes obtained at present, comprises:
and carrying out corresponding probability mapping on the transmission signals according to an equal component distribution technology.
3. The power line communication system power constraint based probability shaping communication method as claimed in claim 1, wherein said performing the probability shaping of the transmission signal comprises:
and carrying out probability shaping on the amplitude and the phase of the transmission signal.
4. A probability shaping communication device based on power constraints of a power line communication system, comprising:
the initial value setting module is used for initializing parameters, wherein the parameters comprise expansion factors;
the power determining module is configured to calculate maxwell-boltzmann distribution of a transmission signal according to the current value of the spreading factor, determine a corresponding mapped digital signal according to the obtained probability of different signal amplitudes, and determine average power of the transmission signal according to the mapped digital signal, where the maxwell-boltzmann distribution is:
Figure QLYQS_16
in the method, in the process of the invention,
Figure QLYQS_18
representing mapped ∈th>
Figure QLYQS_19
Digital signal,/->
Figure QLYQS_21
Representing the transmitted signal->
Figure QLYQS_22
Representation pair->
Figure QLYQS_23
Mapping the corresponding->
Figure QLYQS_24
Probability of->
Figure QLYQS_25
Representing the digital signal order,/->
Figure QLYQS_17
Normalized coefficient representing mapped digital signal, +.>
Figure QLYQS_20
Representing the spreading factor;
the optimizing and probability shaping module is used for judging whether the difference value between the determined average power and the preset communication system power is larger than a preset error threshold value; if yes, updating the value of the expansion factor by using a dichotomy, and jumping to the power determining module; if not, the probability of the transmission signal is mapped according to the probability of different signal amplitudes obtained at present, and the probability shaping of the transmission signal is completed;
the power determining module is specifically configured to, when determining the average power of the transmission signal according to the mapped digital signal:
the average power of the transmitted signal is calculated according to the following formula:
Figure QLYQS_26
in the method, in the process of the invention,
Figure QLYQS_27
representing the average power of the transmitted signal,/->
Figure QLYQS_28
Presetting a signal expansion coefficient;
the optimizing and probability shaping module is specifically configured to, when updating the value of the expansion factor by using a dichotomy:
if the average power is greater than the preset communication system power, updating the value of the expansion factor to be
Figure QLYQS_29
；
If the average power is smaller than the preset communication system power, updating the value of the expansion factor to be
Figure QLYQS_30
。
5. The probability shaping communication device based on power constraint of power line communication system according to claim 4, wherein the optimizing and probability shaping module is configured to, when mapping the transmission signal with the probabilities of different signal amplitudes currently obtained, map the corresponding probabilities:
and carrying out corresponding probability mapping on the transmission signals according to an equal component distribution technology.
6. The probabilistic plastic communication device based on power constraints of a power line communication system as claimed in claim 4, wherein the optimizing and probabilistic plastic module is configured to, when performing the probabilistic plastic of the transmitted signal:
and carrying out probability shaping on the amplitude and the phase of the transmission signal.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107547186A (en) * 2017-09-12 2018-01-05 广西大学 The method that multiple access technique progress radio communication is determined based on efficiency function
CN111935042A (en) * 2020-07-20 2020-11-13 武汉邮电科学研究院有限公司 Probability shaping identification system and method based on machine learning and receiving end
CN111970221A (en) * 2020-06-30 2020-11-20 南京信息工程大学 High-noise-resistance P-bit optical transmission method based on multi-probability distribution
CN112398535A (en) * 2020-10-27 2021-02-23 天津大学 Method for improving transmission capacity of non-orthogonal multiple access visible light communication based on probability shaping

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107547186A (en) * 2017-09-12 2018-01-05 广西大学 The method that multiple access technique progress radio communication is determined based on efficiency function
CN111970221A (en) * 2020-06-30 2020-11-20 南京信息工程大学 High-noise-resistance P-bit optical transmission method based on multi-probability distribution
CN111935042A (en) * 2020-07-20 2020-11-13 武汉邮电科学研究院有限公司 Probability shaping identification system and method based on machine learning and receiving end
CN112398535A (en) * 2020-10-27 2021-02-23 天津大学 Method for improving transmission capacity of non-orthogonal multiple access visible light communication based on probability shaping

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