CN109039380A - A kind of electric line communication system and its phase offset method, device and equipment - Google Patents
A kind of electric line communication system and its phase offset method, device and equipment Download PDFInfo
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- CN109039380A CN109039380A CN201810966038.2A CN201810966038A CN109039380A CN 109039380 A CN109039380 A CN 109039380A CN 201810966038 A CN201810966038 A CN 201810966038A CN 109039380 A CN109039380 A CN 109039380A
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
- H04L27/2621—Reduction thereof using phase offsets between subcarriers
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- 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
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention discloses a kind of phase offset methods applied to electric line communication system, the signal segment including signal to be transmitted to be divided into the first default value group, and the number of sub carrier wave in every group of signal segment is not more than the second default value；Traverse and calculate the peak-to-average power ratio PAPR of all phase offset combined segments of the subcarrier in every group of signal segment；PAPR in every group of signal segment minimum phase offset combined segment is combined into complete phase offset according to original sequence group of subcarrier to combine；Phase offset is carried out to multiple subcarriers in signal to be transmitted according to phase offset combination.The PAPR that the present invention can smoothly complete substantial amounts is calculated, and is reduced the PAPR of signal to be transmitted, is also just reduced the cost and bit error rate of electric line communication system.The invention also discloses a kind of electric line communication system and its phase offset device and equipment, have the identical beneficial effect of phase offset method as above.
Description
Technical field
The present invention relates to field of power line communication, more particularly to a kind of phase offset applied to electric line communication system
Method, the invention further relates to a kind of electric line communication system and its phase offset device and equipment.
Background technique
Electric line communication system refers to using existing power line network system a kind of communication system carried out data transmission
System, homeplug standard provide to use OFDM (Orthogonal Frequency when electric line communication system transmission data
Division Multiplexing, orthogonal frequency division multiplexing) technology, PAPR (Peak-to- of the OFDM technology with signal
Average Power Ratio, peak-to-average power ratio) higher disadvantage.The higher reason of PAPR can be using simplified summary as in signal
Multiple subcarriers phase having the same when reaching receiving end, it is thus possible to one can be generated much higher than average signal power water
Flat instantaneous power offset, so as to cause PAPR higher.
Homeplug standard gives the reference value of phase offset for different subcarriers, and user can be according to reference value
It carries out offset to the phase of each subcarrier to achieve the purpose that reduce PAPR, but for subcarrier, different phase offsets
It combines corresponding PAPR to be different, the effect for the reduction PAPR that the reference value for the phase offset that homeplug standard provides plays
Generally, still require the nonlinear devices such as power amplifier that there is the biggish range of linearity, higher cost, and higher PAPR makes
The bit error rate for obtaining electric line communication system is higher.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art need to solve at present
Problem.
Summary of the invention
The object of the present invention is to provide a kind of phase offset methods applied to electric line communication system, reduce to be launched
The PAPR of signal reduces the cost and bit error rate of electric line communication system；It is a further object of the present invention to provide one
Kind electric line communication system and its phase offset device and equipment, reduce the PAPR of signal to be transmitted, and it is logical to reduce power line
The cost and bit error rate of letter system.
In order to solve the above technical problems, the present invention provides a kind of phase offset sides applied to electric line communication system
Method, comprising:
Signal to be transmitted is divided into the signal segment of the first default value group, the number of sub carrier wave in signal segment described in every group
No more than the second default value；
It traverses and the equal power in peak of phase offset combined segment that the subcarrier in signal segment described in calculating every group is all
Compare PAPR；
By PAPR in signal segment described in the every group minimum phase offset combined segment according to the original suitable of the subcarrier
Sequence group is combined into complete phase offset combination；
Phase offset is carried out to multiple subcarriers in the signal to be transmitted according to phase offset combination.
Preferably, the phase offset combined segment that PAPR in signal segment described in every group is minimum is according to the sub- load
Original sequence group of wave is combined into after complete phase offset combination, described to be combined according to the phase offset to described to be launched
Before multiple subcarriers in signal carry out phase offset, the phase offset method further include:
By the identical phase offset combined segment of the order reciprocal of PAPR in signal segment described in every group according to the sub- load
Original sequence group of wave is combined into the complete phase offset combination, wherein ignores the phase offset of order last
Combined segment；
Calculate the PAPR of the combination of phase offset described in every group be combined into；
The phase offset for selecting PAPR minimum is combined as optimum angle offset combinations；
It is then described that phase is carried out to multiple subcarriers in the signal to be transmitted according to phase offset combination
Offset specifically:
It is inclined that phase is carried out to multiple subcarriers in the signal to be transmitted according to the optimum angle offset combinations
It moves.
Preferably, the signal segment that signal to be transmitted is divided into the first default value group, in signal segment described in every group
Number of sub carrier wave be not more than the second default value specifically:
Signal to be transmitted is divided into the signal segment of the first default value group, the sub-carrier number in signal segment described in every group
Mesh be the second default value, when cannot equal timesharing, in advance from the front end of the signal to be transmitted replicate third default value height
Carrier wave and the end for adding to the signal to be transmitted, so that the signal to be transmitted can be divided equally.
Preferably, after the PAPR for calculating the combination of phase offset described in every group be combined into, the selection PAPR is most
Low phase offset combination is used as before optimum angle offset combinations, the phase offset method further include:
Calculate the power peak of the combination of phase offset described in every group be combined into；
The PAPR and the power peak of the combination of the phase offset described in every group are weighted according to default weight,
The weighted value of the combination of phase offset described in obtaining every group；
Then the phase offset for selecting PAPR minimum is combined as optimum angle offset combinations specifically:
The phase offset for selecting the weighted value minimum is combined as optimum angle offset combinations.
Preferably, the third default value is less than second default value.
Preferably, the default weight of the PAPR and the default weight of the power peak are 0.5.
Preferably, second default value is 7.
In order to solve the above technical problems, the present invention also provides a kind of phase offset dresses applied to electric line communication system
It sets, comprising:
Grouping module, for signal to be transmitted to be divided into the signal segment of the first default value group, signal segment described in every group
Interior number of sub carrier wave is not more than the second default value；
Computing module, the phase offset combination all for the subcarrier in signal segment described in traversing and calculating every group
The peak-to-average power ratio PAPR of section；
Composite module, for by PAPR in signal segment described in the every group minimum phase offset combined segment according to the son
Original sequence group of carrier wave is combined into complete phase offset combination；
Execution module, for according to the phase offset combination to multiple subcarriers in the signal to be transmitted into
Row phase offset.
In order to solve the above technical problems, the present invention also provides a kind of phase offsets applied to electric line communication system to set
It is standby, comprising:
Memory, for storing computer program；
Processor, when for executing the computer program the step of realization any one as above phase offset method.
In order to solve the above technical problems, the present invention also provides a kind of electric line communication systems, including answer as described above
Phase offset device for electric line communication system.
The present invention provides a kind of phase offset methods applied to electric line communication system, including signal to be transmitted is divided
For the signal segment of the first default value group, the number of sub carrier wave in every group of signal segment is not more than the second default value；Traversal is simultaneously
Calculate the peak-to-average power ratio PAPR of all phase offset combined segments of subcarrier in every group of signal segment；It will be in every group of signal segment
PAPR minimum phase offset combined segment is combined into complete phase offset according to original sequence group of subcarrier and combines；According to phase
Offset combinations carry out phase offset to multiple subcarriers in signal to be transmitted.
As it can be seen that signal to be transmitted can be divided into the signal segment of the first default value group first in the present invention, calculate every
The PAPR of all phase offset combined segments of group signal segment sub-carriers, it is then that the minimum phase of PAPR in every group of signal segment is inclined
It moves combined segment and is combined into complete phase offset combination according to original sequence group of subcarrier, finally further according to phase offset combination pair
Multiple subcarriers in signal to be transmitted carry out phase offset, and the number of sub carrier wave of every group of signal segment can be limited in by the present invention
In second default value, the calculating of the PAPR of substantial amounts is favorably accomplished, it is inclined by the minimum phase of PAPR in each signal segment
The complete phase offset combination that combined segment is reassembled into is moved, the PAPR of phase offset combination is relatively low, reduces pending
The PAPR for penetrating signal reduces the requirement to the range of linearity of nonlinear device in electric line communication system, reduces costs, drop
The low bit error rate of electric line communication system.
The present invention also provides a kind of electric line communication system and its phase offset device and equipment, have phase as above inclined
The identical beneficial effect of shifting method.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of flow diagram of the phase offset method applied to electric line communication system provided by the invention；
Fig. 2 is a kind of structural schematic diagram of the phase offset device applied to electric line communication system provided by the invention；
Fig. 3 is a kind of structural schematic diagram of the phase offset device applied to electric line communication system provided by the invention.
Specific embodiment
Core of the invention is to provide a kind of phase offset method applied to electric line communication system, reduces to be launched
The PAPR of signal reduces the cost and bit error rate of electric line communication system；Another core of the invention is to provide one
Kind electric line communication system and its phase offset device and equipment, reduce the PAPR of signal to be transmitted, and it is logical to reduce power line
The cost and bit error rate of letter system.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of stream of the phase offset method applied to electric line communication system provided by the invention
Journey schematic diagram, comprising:
Step S1: signal to be transmitted is divided into the signal segment of the first default value group, the subcarrier in every group of signal segment
Number is not more than the second default value；
Specifically, offset phase is shared, and eight kinds of 0-7 may (wherein specific phase shift be big for each subcarrier
It is small be by the number of phase-shift values in 0-7 multiplied byNumber of sub carrier wave in every group of signal segment is not more than the second default value, in this way
A possibility that ensuring that the phase offset combined segment in every group of signal segment be up to 8MKind, wherein M is the second default value,
That is it for every group of signal segment, at most only needs to carry out 8MSecondary calculating can be guaranteed by the second default value of control
The calculating of every group of PAPR is gone on smoothly.
Specifically, the sub-carrier number purpose number in signal to be transmitted can be common in multiple types, such as communication
No. 74-510 totally 437 subcarriers be also an option that other numbers according to different demands certainly, such as can choose 7 or
Person 510 etc., the embodiment of the present invention is it is not limited here.
Specifically, other restrictions are not done for the number of subcarrier in every group of signal segment, as long as the son in every group of signal segment
Carrier number is not more than the second default value.
Wherein, the number of the first default value representation signal section, can be not particularly limited it, as long as every group of signal segment
Interior number of sub carrier wave is not more than the second default value, on the basis of meeting this condition, the tool of the first default value
Body numerical value can freely be set, it might even be possible to total number of sub-carriers the two endpoint values being set as in 1 or signal to be transmitted.
Step S2: traversing and calculates the peak-to-average power ratio of all phase offset combined segments of the subcarrier in every group of signal segment
PAPR；
Specifically, the number of all phase offset combined segments of the subcarrier in every group of signal segment can be a variety of feelings
Condition, such as can be 8MIt is a, wherein what numerical value 8 here represented is the number of the phase offset mode of each subcarrier, is root
It is determined according to the smallest offset unit of preset phase offset, when smallest offset unit isWhen, the phase of each subcarrier is inclined
Shifting mode has 8 kinds, and the smallest offset unit of subcarrier may be arranged as other values, and the embodiment of the present invention is it is not limited here.
Wherein, calculate phase offset combined segment PAPR method can there are many kinds of, the embodiment of the present invention is not done herein
It limits.
Wherein, traversal function can be realized in such a way that function is nested, be obtained by the recursive mode of function.
Step S3: it combines PAPR in every group of signal segment minimum phase offset combined segment according to original sequence of subcarrier
For the combination of complete phase offset；
Specifically, being using truncation grouping when since signal to be transmitted being divided into the signal segment that the first default value is organized
Method, therefore by all signal segments reconfigure for complete phase offset combination when subcarrier it is original
Sequence is combined, and then carries out subsequent step again.
Step S4: phase offset is carried out to multiple subcarriers in signal to be transmitted according to phase offset combination.
It, can be by PAPR in every group of signal segment most in the embodiment of the present invention in view of the technical problem in above-mentioned background technique
Low phase offset combined segment is combined into complete phase offset according to the original sequence group of subcarrier and combines, inclined according to complete phase
It moves combination and phase offset is carried out to signal to be transmitted, in such cases, due to having chosen the phase that PAPR is minimum in every group of signal segment
Position offset combinations section, therefore final complete phase offset combination equally has lower PAPR, significantly reduces to be launched
The PAPR of signal is also just reduced and the range of linearity of the nonlinear devices such as electric line communication system intermediate power amplifier is wanted
It asks, reduces costs, and make the bit error rate of system lower.
The present invention provides a kind of phase offset methods applied to electric line communication system, including signal to be transmitted is divided
For the signal segment of the first default value group, the number of sub carrier wave in every group of signal segment is not more than the second default value；Traversal is simultaneously
Calculate the peak-to-average power ratio PAPR of all phase offset combined segments of subcarrier in every group of signal segment；It will be in every group of signal segment
PAPR minimum phase offset combined segment is combined into complete phase offset according to original sequence group of subcarrier and combines；According to phase
Offset combinations carry out phase offset to multiple subcarriers in signal to be transmitted.
As it can be seen that signal to be transmitted can be divided into the signal segment of the first default value group first in the present invention, calculate every
The PAPR of all phase offset combined segments of group signal segment sub-carriers, it is then that the minimum phase of PAPR in every group of signal segment is inclined
It moves combined segment and is combined into complete phase offset combination according to original sequence group of subcarrier, finally further according to phase offset combination pair
Multiple subcarriers in signal to be transmitted carry out phase offset, and the number of sub carrier wave of every group of signal segment can be limited in by the present invention
In second default value, the calculating of the PAPR of substantial amounts is favorably accomplished, it is inclined by the minimum phase of PAPR in each signal segment
The complete phase offset combination that combined segment is reassembled into is moved, the PAPR of phase offset combination is relatively low, reduces pending
The PAPR for penetrating signal reduces the requirement to the range of linearity of nonlinear device in electric line communication system, reduces costs, drop
The low bit error rate of electric line communication system.
On the basis of the above embodiments:
Embodiment as one preferred, by PAPR in every group of signal segment minimum phase offset combined segment according to subcarrier
Original sequence group be combined into after the combination of complete phase offset, combined according to phase offset to multiple sons in signal to be transmitted
Before carrier wave carries out phase offset, the phase offset method further include:
By the identical phase offset combined segment of the order reciprocal of PAPR in every group of signal segment according to original sequence of subcarrier
Group is combined into complete phase offset combination, wherein ignores the phase offset combined segment of order last；
Specifically, the phase offset combined segment of order last combined in last step, therefore this step
In be not necessarily to repeated combination again, only need the identical phase offset combined segment of PAPR inverse order according to son in the embodiment of the present invention
Original sequence group of carrier wave is combined into the combination of complete phase offset, such as that PAPR in every group is ordered as penultimate phase is inclined
It moves combined segment group and is combined into complete phase offset combination, PAPR in every group is ordered as to phase offset combined segment group third from the bottom
It is combined into complete phase offset combination etc., the embodiment of the present invention is it is not limited here.
Wherein, be finally combined into complete phase offset combination number can be most by number of sub carrier wave signal segment
Number of sub carrier wave determined, for example, when the number of sub carrier wave of the most signal segment of number of sub carrier wave is the second default value, this
When can be combined into the second default value phase offset combination, if the phase offset combined segment in some signal segment is carrying out
Number is inadequate when combination, can be using the PAPR in this signal segment minimum phase offset combined segment as supplement.
Calculate the PAPR for the every group of phase offset combination being combined into；
The phase offset for selecting PAPR minimum is combined as optimum angle offset combinations；
Specifically, the PAPR for the every group of phase offset combination being combined into can be calculated in the embodiment of the present invention, to judge more
A variety of possibility seek the phase offset combination of lower PAPR, to reach the PAPR for reducing signal to be transmitted to a greater degree
Purpose.
Wherein, the maximum number of phase offset combination also can control 8MIt is a, calculating can be made smoothly to carry out.
It is then combined according to phase offset and phase offset is carried out to multiple subcarriers in signal to be transmitted specifically:
Phase offset is carried out to multiple subcarriers in signal to be transmitted according to optimum angle offset combinations.
Specifically, the optimum angle offset combinations that the comparison of the PAPR combined by a variety of phase offsets obtains have lower
PAPR, the PAPR of signal to be transmitted can be made to further decrease.
Signal to be transmitted is divided into the signal segment of the first default value group, every group of letter by embodiment as one preferred
Number of sub carrier wave in number section is not more than the second default value specifically:
Signal to be transmitted is divided into the signal segment of the first default value group, the number of sub carrier wave in every group of signal segment is
Second default value, when cannot equal timesharing, replicate third default value subcarrier and mend from the front end of signal to be transmitted in advance
It is charged to the end of signal to be transmitted, so that signal to be transmitted can be divided equally.
Specifically, signal to be transmitted to be divided into the signal segment of the first default value group, the son in every group of signal segment is carried
Wave number mesh is that the second default value can make reaching for the first default value in the case where defining the second default value
Minimum value, and the number of sub carrier wave in every group is identical, simplifies calculating process, improves calculating speed, and in each signal segment
Number of sub carrier wave it is maximum, the PAPR of longer signal segment can be calculated and then be combined, be conducive to further reduce
The PAPR of signal to be transmitted.
Wherein, the first default value in the embodiment of the present invention, the second default value and third default value can be with
For positive integer.
It certainly, can also be by other than in addition to such for the set-up mode of the first default value and the second default value
One default value and the second default value are set as other forms, and the embodiment of the present invention is it is not limited here.
Embodiment as one preferred selects PAPR after calculating the PAPR that every group of phase offset being combined into combines
Minimum phase offset combination is used as before optimum angle offset combinations, the phase offset method further include:
Calculate the power peak for the every group of phase offset combination being combined into；
Specifically, the requirement for devices such as power amplifiers is also higher, increases into view of power peak is higher
This, thereby increases and it is possible to it can reduce the service life of device, in the embodiment of the present invention, the every group of phase offset combination being combined into can be calculated
Power peak, be then added in the next steps in the reference quantity of selected phase offset combinations, so that final phase
Offset combinations are more reasonable, create a further reduction cost.
The PAPR and power peak combine to every group of phase offset is weighted according to default weight, obtains every group
The weighted value of phase offset combination；
The phase offset for then selecting PAPR minimum is combined as optimum angle offset combinations specifically:
The phase offset for selecting weighted value minimum is combined as optimum angle offset combinations.
Please refer to the following table 1, table 1 be it is provided in an embodiment of the present invention when the second default value (M) takes the numerical value in 1-7,
Calculate corresponding minimum PAPR.
Table 1
As it can be seen that remaining calculates the PAPR of corresponding phase offset combination when M value is bigger other than M is 3 or 4
Smaller, when M is 7, corresponding minimum PAPR is 0.1072, and PAPR is made to have reached minimum.
Specifically, PAPR and power peak that the embodiment of the present invention can combine every group of phase offset are weighted meter
It calculates, calculates weighted value, comprehensive reference two factors of PAPR and power peak, PAPR can guarantee power near mean value
Fluctuation, and the peak power value of signal to be transmitted can be made to reduce using power peak as reference quantity, it creates a further reduction
Requirement to related device in system, reduces costs.
Certainly, in addition to power peak to be added in reference quantity, outside the weighted value for calculating PAPR and power peak,
Other reference quantities can also be joined and be weighted, the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, third default value is less than the second default value.
Specifically, regulation third default value is represented less than the second default value: the sub-carrier number in every group of signal segment
Mesh be the second default value and signal to be transmitted can not equal timesharing, the son of minimal number can be taken from the front end of signal to be transmitted
Carrier wave adds to the end of signal to be transmitted and then is divided equally, and such situation can reduce calculation amount.
Certainly, other than such arbitrary way, third default value can also be added on the basis of such arbitrary way
Add N number of second default value, that is to say, that N number of second default value can be replicated from the front end of signal to be transmitted and add third
The subcarrier of default value adds to the end of signal to be transmitted, can still divide equally in such cases, it is, of course, also possible to not into
Any supplement of row, even if inadequate second default value of number of sub carrier wave in last group of signal segment, can also carry out subsequent
It calculates, the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, the default weight of PAPR and the default weight of power peak are 0.5.
Specifically, it is of equal importance to consider that the size of PAPR and the size of power peak have signal to be transmitted
It acts on, the default weight of the two is respectively provided with for 0.5 in the embodiment of the present invention, it can the balanced shadow for considering two reference quantities
It rings, so that requirement of the signal to be transmitted for device each in system is smaller, it is also smaller for the loss of device, further extend
Service life.
Certainly, other than the weight of the two is disposed as 0.5, other numbers can also be set by the weight of the two
Value, such as PAPR is 0.6, power peak is 0.4 etc., the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, the second default value are 7.
Specifically, the second default value can make the number of sub carrier wave in every group of signal segment no more than 7 for 7, such feelings
Under condition, the maximum quantity of the phase offset combined segment in every group of signal segment is 87A, MATLAB can be successfully to every group of signal
Duan Jinhang operation, and the combination for the complete phase offset being combined into subsequent step is not more than 87, the meter of whole process
Calculation can be completed smoothly, to obtain final phase offset combination, play the role of reducing signal to be transmitted PAPR.
Wherein, during MATLAB is emulated, when the maximum quantity of calculating is more than 87When it is possible that program is direct
Determine infinitely great situation.
Certainly, other than setting 7 for the second default value, the second default value can also be other numerical value, such as 1-6
Any value, it might even be possible to be greater than 7, the embodiment of the present invention is it is not limited here.
Referring to FIG. 2, Fig. 2 is a kind of knot of the phase offset device applied to electric line communication system provided by the invention
Structure schematic diagram, comprising:
Grouping module 1, for signal to be transmitted to be divided into the signal segment of the first default value group, in every group of signal segment
Number of sub carrier wave is not more than the second default value；
Computing module 2, for traversing and calculating the peak of all phase offset combined segments of the subcarrier in every group of signal segment
Equal power ratio PAPR；
Composite module 3, for by PAPR in every group of signal segment minimum phase offset combined segment according to the original of subcarrier
Sequence group is combined into complete phase offset combination；
Execution module 4, for carrying out phase offset to multiple subcarriers in signal to be transmitted according to phase offset combination.
The introduction of phase offset device provided in an embodiment of the present invention applied to electric line communication system is please referred to
The embodiment of Such phase offset method, details are not described herein for the embodiment of the present invention.
Referring to FIG. 3, Fig. 3 is a kind of knot of the phase offset device applied to electric line communication system provided by the invention
Structure schematic diagram, comprising:
Memory 5, for storing computer program；
Processor 6, when for executing computer program realize as above any one of phase offset method the step of.
The introduction of phase offset device provided in an embodiment of the present invention applied to electric line communication system is please referred to
The embodiment of Such phase offset method, details are not described herein for the embodiment of the present invention.
The present invention also provides a kind of electric line communication systems, are applied to power line communication system including such as previous embodiment
The phase offset device of system.
The reality of Such phase offset method is please referred to for the introduction of electric line communication system provided in an embodiment of the present invention
Example is applied, details are not described herein for the embodiment of the present invention.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or equipment for including the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of phase offset method applied to electric line communication system characterized by comprising
Signal to be transmitted is divided into the signal segment of the first default value group, the number of sub carrier wave in signal segment described in every group is little
In the second default value；
It traverses and the peak-to-average power ratio of phase offset combined segment that the subcarrier in signal segment described in calculating every group is all
PAPR；
By PAPR in signal segment described in the every group minimum phase offset combined segment according to original sequence group of the subcarrier
It is combined into complete phase offset combination；
Phase offset is carried out to multiple subcarriers in the signal to be transmitted according to phase offset combination.
2. phase offset method according to claim 1, which is characterized in that it is described by PAPR in signal segment described in every group most
After the low phase offset combined segment is combined into complete phase offset combination according to original sequence group of the subcarrier, institute
It states before carrying out phase offset to multiple subcarriers in the signal to be transmitted according to phase offset combination, the phase
Position offset method further include:
By the identical phase offset combined segment of the order reciprocal of PAPR in signal segment described in every group according to the subcarrier
Original sequence group is combined into the complete phase offset combination, wherein ignores the phase offset combination of order last
Section；
Calculate the PAPR of the combination of phase offset described in every group be combined into；
The phase offset for selecting PAPR minimum is combined as optimum angle offset combinations；
It is then described that phase offset is carried out to multiple subcarriers in the signal to be transmitted according to phase offset combination
Specifically:
Phase offset is carried out to multiple subcarriers in the signal to be transmitted according to the optimum angle offset combinations.
3. phase offset method according to claim 2, which is characterized in that described signal to be transmitted is divided into first to preset
The signal segment of numerical value group, the number of sub carrier wave in signal segment described in every group are not more than the second default value specifically:
Signal to be transmitted is divided into the signal segment of the first default value group, the number of sub carrier wave in signal segment described in every group is
Second default value, when cannot equal timesharing, in advance from the front end of the signal to be transmitted replicate third default value subcarrier
And the end of the signal to be transmitted is added to, so that the signal to be transmitted can be divided equally.
4. phase offset method according to claim 3, which is characterized in that described to calculate phase described in every group be combined into
After the PAPR of offset combinations, it is described select PAPR it is minimum the phase offset combination as optimum angle offset combinations it
Before, the phase offset method further include:
Calculate the power peak of the combination of phase offset described in every group be combined into；
The PAPR and the power peak of the combination of the phase offset described in every group are weighted according to default weight, obtain
The weighted value of the combination of phase offset described in every group；
Then the phase offset for selecting PAPR minimum is combined as optimum angle offset combinations specifically:
The phase offset for selecting the weighted value minimum is combined as optimum angle offset combinations.
5. phase offset method according to claim 3, which is characterized in that the third default value is less than described second
Default value.
6. phase offset method according to claim 4, which is characterized in that the default weight of the PAPR and the function
The default weight of rate peak value is 0.5.
7. phase offset method according to any one of claims 1 to 6, which is characterized in that second default value is
7。
8. a kind of phase offset device applied to electric line communication system characterized by comprising
Grouping module, for signal to be transmitted to be divided into the signal segment of the first default value group, in signal segment described in every group
Number of sub carrier wave is not more than the second default value；
Computing module, the phase offset combined segment all for the subcarrier in signal segment described in traversing and calculating every group
Peak-to-average power ratio PAPR；
Composite module, for by PAPR in signal segment described in the every group minimum phase offset combined segment according to the subcarrier
Original sequence group be combined into the combination of complete phase offset；
Execution module, for carrying out phase to multiple subcarriers in the signal to be transmitted according to phase offset combination
Position offset.
9. a kind of phase offset device applied to electric line communication system characterized by comprising
Memory, for storing computer program；
Processor, realizing the phase offset method as described in any one of claim 1 to 7 when for executing the computer program
Step.
10. a kind of electric line communication system, which is characterized in that including being applied to power line communication system as claimed in claim 9
The phase offset device of system.
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