CN109005005A - A kind of pseudo-random signal hybrid coding method and system - Google Patents
A kind of pseudo-random signal hybrid coding method and system Download PDFInfo
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- CN109005005A CN109005005A CN201811309318.2A CN201811309318A CN109005005A CN 109005005 A CN109005005 A CN 109005005A CN 201811309318 A CN201811309318 A CN 201811309318A CN 109005005 A CN109005005 A CN 109005005A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0022—PN, e.g. Kronecker
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0022—PN, e.g. Kronecker
- H04J13/0025—M-sequences
Abstract
The embodiment of the invention provides a kind of pseudo-random signal hybrid coding methods, comprising: echo signal waveform needed for detection obtains electromagnetic survey engineering；First pseudo-random sequence and the second pseudo-random sequence are matched according to preset frequency wave and carry out hybrid coding, to export target pseudo-random sequence, and geophysical exploration is carried out according to the target pseudo-random sequence, the waveform of the target pseudo-random sequence corresponds to the echo signal waveform；First pseudo-random sequence isx* a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor preset constant.A kind of pseudo-random signal hybrid coding method provided in an embodiment of the present invention, pass through byx*a n The sequence of form withy*b n The sequence of form is combined according to preset frequency wave proportion, to generate the target pseudo-random signal for meeting any combination of pseudorandomcode rule.Generating process is convenient, general, and has passed through the certificate authenticity of engineering practice, works well.
Description
Technical field
The present embodiments relate to technical field of geophysical exploration more particularly to a kind of pseudo-random signal hybrid coding sides
Method and system.
Background technique
Pseudo-random signal, be it is a kind of look like random, random, but be actually regular, not
Random signal.Electrical prospecting needs are motivated using certain signal, in addition to magnetotelluric (MT) method and natural electric field (SP)
Method using natural electric (magnetic) field as field source outside, direct current (DC) method is powered using DC power supply, induced polarization (IP) method with manually
Source electromagnetic method (CSAMT or TEM) mostly uses continuous periodically rectangle square wave to motivate (although can also use sine in principle
Current wave).Pseudo-random signal involved in this patent, be it is a kind of suitable for electrical prospecting witha n Pseudorandom based on sequence
Signal.In controllable source Electrical Prospecting Technology, using pseudo-random signal, objective body is identified by specific receive-send technology,
There is the quite application with maturation extensively in geophysical prospecting equipment.
Currently, the geophysical prospecting equipment using pseudo-random signal development of mainstream is substantially 2 in the marketnPseudorandom sequence
Column.This sequence is a kind of 2 times of frequency differences, the equidistant pseudo-random signal sequences of log intervals, its main feature is that frequency difference is big, frequency
Wide coverage, application efficiency is higher in the more rough exploration such as petroleum, natural gas, tectonics, and effect is more preferable.But
It is detected etc. in fine granularing scalabilities in metallic ore, oil gas Fracturing Monitoring or Small object body, single 2nPseudo-random sequence since frequency difference is big,
Spectral density is inadequate, can not obtain good effect.
Therefore a kind of pseudo-random signal hybrid coding method is needed now to solve the above problems.
Summary of the invention
To solve the above-mentioned problems, the embodiment of the present invention provides one kind and overcomes the above problem or at least be partially solved
State the pseudo-random signal hybrid coding method and system of problem.
The first aspect embodiment of the present invention provides a kind of pseudo-random signal hybrid coding method, comprising:
Echo signal waveform needed for detection obtains electromagnetic survey engineering；
First pseudo-random sequence and the second pseudo-random sequence are matched according to preset frequency wave and carry out hybrid coding, to export target
Pseudo-random sequence, and geophysical exploration, the waveform of the target pseudo-random sequence are carried out according to the target pseudo-random sequence
The corresponding echo signal waveform；
First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor preset constant.
The embodiment of the invention also provides a kind of pseudo-random signal hybrid coding systems for second aspect, comprising:
Detection module, for echo signal waveform needed for detecting acquisition electromagnetic survey engineering；
Coding module, for the first pseudo-random sequence and the second pseudo-random sequence to be carried out mixing volume according to preset frequency wave proportion
Code to export target pseudo-random sequence, and carries out geophysical exploration according to the target pseudo-random sequence, the target puppet with
The waveform of machine sequence corresponds to the echo signal waveform；
First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor preset constant.
The embodiment of the invention provides a kind of pseudo-random signal hybrid encoding devices for the third aspect, comprising:
Processor, memory, communication interface and bus；Wherein, the processor, memory, communication interface pass through the bus
Complete mutual communication；The memory is stored with the program instruction that can be executed by the processor, and the processor calls
Described program instruction is able to carry out a kind of pseudo-random signal hybrid coding method described above.
The embodiment of the invention provides a kind of non-transient computer readable storage medium, the non-transient calculating for fourth aspect
Machine readable storage medium storing program for executing stores computer instruction, and the computer instruction makes the computer execute the above method.
A kind of pseudo-random signal hybrid coding method and system provided in an embodiment of the present invention, pass through byx*a n The sequence of form
Column withy*b n The sequence of form is combined according to preset frequency wave proportion, meets any of pseudorandomcode rule to generate
The target pseudo-random signal of combining form.Generating process is convenient, general, and has passed through the certificate authenticity of engineering practice, effect
Well.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of pseudo-random signal hybrid coding method flow schematic diagram provided in an embodiment of the present invention；
Combined waveform schematic diagram when Fig. 2 is the frequency wave proportion of 1:2 provided in an embodiment of the present invention；
Combined waveform schematic diagram when Fig. 3 is the frequency wave proportion of 2:1 provided in an embodiment of the present invention；
Fig. 4 is a kind of pseudo-random signal hybrid coding system construction drawing provided in an embodiment of the present invention；
Fig. 5 is the structural block diagram of pseudo-random signal hybrid encoding device provided in an embodiment of the present invention.
Specific embodiment
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 solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Currently, there are mainly four types of modes for common pseudorandom waveform encoding method:
1, the electronic circuit integrated chip basic with door or door, NOT gate, counter etc. with simple and some electricity substantially
Sub- component auxiliary directly generates the pseudorandom code sequence needed and output by certain electronic circuit Combination Design.
2, with the development of electronic technology, using programmable logic device (CPLD), for it is specific, have a set pattern
Rule (such asnIt is smaller,a=2a n Pseudo-random signal) pseudo-random sequence, inside Complex programmable logic device with door,
Or the specific combination of the basic logic units such as door, NOT gate, counter, directly generate the pseudorandom code sequence needed and output.
3, by the corresponding program unit of matlab software design or Circuit Emulation Unit generate relatively simple M code puppet with
Machine coded sequence.
4, pseudorandom waveform generating process is directly drawn using drawing software or other tool software, lists pseudorandom manually
Coded sequence.
But the mode of four kinds of above-mentioned generation pseudorandom code sequences suffers from respectively obvious disadvantage, what method 1 designed
Electronic circuit is complicated, and integrated level is low, and can only design generate it is some it is specific, better simply, wave sequence is uncomplicated, single
Pseudo-random signal, it is helpless for general, more complex pseudo-random signal waveform.2 electronic circuit of method is simple, integrates
Degree is high, but logical design mode is complicated, and flexibility is very poor, and this mode can only be used to generate some relative complex or regular spy
Other pseudo-random signal waveform, and cannot quick change logical design mode according to demand, generate pseudorandom code sequence,
Some long and more complex combination pseudorandom code sequences greatly can not be generated.Method 3 is often used to generate some single
Pseudorandom code sequence, it is relatively difficult for the coding of combining form, it is also comparatively laborious.Method 4 is shorter suitable for sequence length,
And the lower simple pseudorandom code sequence of complexity, pseudorandom code sequence higher for complexity are then helpless.
In view of the above-mentioned problems, Fig. 1 is that a kind of pseudo-random signal hybrid coding method flow provided in an embodiment of the present invention shows
It is intended to, as shown in Figure 1, comprising:
Echo signal waveform needed for S1, detection obtain electromagnetic survey engineering；
S2, the first pseudo-random sequence and the second pseudo-random sequence are matched into progress hybrid coding according to preset frequency wave, with output
Target pseudo-random sequence, and geophysical exploration is carried out according to the target pseudo-random sequence, the target pseudo-random sequence
Waveform corresponds to the echo signal waveform；
First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor preset constant.
In step sl, generally requiring to use specific Exploration signals waveform when carrying out electromagnetic survey engineering could complete
Electromagnetic survey task, echo signal waveform described in the specific objective waveform, that is, embodiment of the present invention are normal in electromagnetic survey field
That is pseudo-random signal waveform, especiallya=2a n Pseudo-random signal.
In step s 2, it is to be understood that in order to obtain carry out electromagnetic survey engineering needed for signal waveform, the present invention
Embodiment is matched using a kind of two pseudo-random sequences according to preset frequency wave by the way of the new pseudo-random sequence of combination producing.It is raw
At new pseudo-random sequence, that is, embodiment of the present invention in target pseudo-random sequence.
Wherein, the first pseudo-random sequence can be expressed as by the embodiment of the present inventionx*a n , the second pseudo-random sequence is expressed asy*b n , then by adjustingx、a、y、bValue and combined frequency wave proportion, that is, produce different target pseudo-random sequences.
Pseudo-random sequence in embodiments of the present invention witha n It is kind containing the k being distributed by a system for pseudo-random signal
The encoded signal of a basic frequency is using the self-enclosed addition principle in 1,0, -1 three element set, it has the coding of itself
Rule.This coding has certain randomness, and element 1 and -1 is in the alternate appearance of spacing of not grade, and the probability of appearance is equal, again
With periodicity, it may be predetermined that and repeat to generate, it is not really random, so referred to as pseudorandom code sequence.
Further, by the first pseudo-random sequencex*a n With the second pseudorandomy*b n It is combined waveform, electromagnetism can be configured
Various waveforms needed for exploration engineering, such as: pseudo-random signal 2n7 frequency waves, 13 frequency waves, 19 frequency waves, wherein 2n19 frequency waves
It can be based on 1*2nWith 1.5*2nIt is generated with the ratio hybrid coding of 10:9, in another example, it is generated as required for electromagnetic survey engineering
19 frequency waves, can also according to the preset frequency wave of 10:9 match 1*3nWith 2*2nCarry out hybrid coding, the generating mode of other frequency waves
The value of corresponding adjustable parameter obtains, and details are not described herein for the embodiment of the present invention.
So in actual mechanical process, it is only necessary to setx、a、y、bValue, combination frequency wave match number, and need
The waveform length of outputLAnd the lowest frequency components frequency of target pseudo-random sequence output waveformFl, highest frequency component frequency
RateFh, so that it may complete the coding of respective objects pseudo-random sequence.Correspondingly, according to above-mentioned parameter can calculate target puppet with
The waveform parameter of machine sequence, such as: driving source frequencyfg, signal acquisition frequencyfs, acquisition lengthN, sequence lengthYNEtc..
Wherein, acquisition length is a waveform cycle period under current sample rateTInterior all number of sampling pointsN=T* fs, sequence lengthYNAs currently under driving source frequency, a waveform cycle periodTInterior all driving pulse numbersYN=T*fg,
And drive source frequencyfg, signal acquisition frequencyfsAnd the waveform cycle periodTIt can be by lowest frequency components frequencyFl, highest frequency
Component frequenciesFhAnd combined frequency wave proportion number determines.
A kind of pseudo-random signal hybrid coding method provided in an embodiment of the present invention, pass through byx*a n The sequence of form withy* b n The sequence of form is combined according to preset frequency wave proportion, to generate any combination shape for meeting pseudorandomcode rule
The target pseudo-random signal of formula.Generating process is convenient, general, and has passed through the certificate authenticity of engineering practice, works well.
On the basis of the above embodiments, it is described by the first pseudo-random sequence and the second pseudo-random sequence according to preset frequency
Wave proportion carries out hybrid coding and is specifically included with exporting target pseudo-random sequence:
Based in first pseudo-random sequencexWithaValue and second pseudo-random sequence inyWithbValue, determine
Coding form；
Based on the coding form, the corresponding driving source frequency of corresponding encoded form and waveform cycle period are calculated, with output
Target pseudo-random sequence.
As can be seen from the above embodiments, the embodiment of the invention provides a kind of utilizationsx*a n The sequence of form withy*b n Form
The mode of sequence hybrid coding generation target pseudo-random sequence.It is understood that differentx*a n Withy*b n Between there are a variety of
Combining form, different combining forms may correspond to different encoder complexities, and the code stream of output also can be corresponding different, root
According to different situations, coding form can be summarised as two kinds of coding forms: basic coding form and assembly coding by the embodiment of the present invention
Form.
Basic coding form is the waveform coding process of citation form, and the code stream of output is single, simple, complexity is low, and
Assembly coding form is the waveform coding process of combining form, and the code stream mixing of output, complexity are matched according to different frequency waves
Cause the difference of driving frequency and waveform cycle period.
On the basis of the above embodiments, based in first pseudo-random sequencexWithaValue and described second pseudo-
In random sequenceyWithbValue, determine coding form, specifically include:
Whenx=yAnda=bWhen, determine the coding form for citation form coding；
Whenx=0Ory=0When, determine the coding form for citation form coding；
Whenx≠0、y≠0、x≠yAnda≠bWhen, determine the coding form for combining form coding.
Specifically, the embodiment of the present invention can will list three kinds according to the value of x, a, y, b and the relationship between them
Common combined situation.
The first is to work asx=yAnda=bWhen, it is to be understood that in this case the first pseudo-random sequence and second it is pseudo- with
Machine sequence is the same representation, then the waveform that two same combined sequences generate also does not change accordingly, so can
To be classified as citation form coding.
Second is to work asx=0Ory=0When, it is to be understood that eitherx=0OrY=0,It is so corresponding there was only one in fact
A pseudo-random sequence participates in combination, then the waveform generated does not have variation accordingly yet, then can also be by such situation point
Class is citation form coding.
The third is to work asx≠0、y≠0、x≠yAnda≠bWhen, it is to be understood that as long asx≠0、 y≠0、x≠yAnda ≠bWhen, then involved first pseudo-random sequence is different with the second pseudo-random sequence and is 0 there is no one of them, that
It is directed to the combination of this situation, combining form coding can be classified as.
On the basis of the above embodiments, described to be based on the coding form, calculate the corresponding driving of corresponding encoded form
Source frequency and waveform cycle period, to export target pseudo-random sequence, comprising:
If the coding form is citation form coding, it is determined that the frequency of lowest frequency components needed for the target pseudo-random sequence
RateFlAnd highest frequency component frequencyFh, and calculate the driving source frequencyfg=Fh, the waveform cycle period。
It is directed in above-described embodiment the case where citation form encodes, it is to be understood that target pseudo-random sequence and defeated
The waveform of the pseudo-random sequence entered is consistent, then driving source frequency in calculating processfgEqual to highest frequency component frequencyFh, one
A waveform cycle period?.
On the basis of the above embodiments, described to be based on the coding form, calculate the corresponding driving of corresponding encoded form
Source frequency and waveform cycle period, to export target pseudo-random sequence, comprising:
If the coding form is combining form coding, it is based on first pseudo-random sequence and second pseudo-random sequence
Preset frequency wave proportion, lowest frequency components frequency needed for determining the target pseudo-random sequenceFlAnd highest frequency point
Measure frequencyFh；
Based on the lowest frequency components frequencyFl, the waveform cycle period is calculated, and based on the highest frequency component frequency
RateFh, calculate the driving source frequency.
And it is directed to the case where combining form encodes in above-described embodiment, it is to be understood that the embodiment of the present invention can root
According to the frequency wave of the first pseudo-random sequence and the second pseudo-random sequence match difference, so that it is determined that the different waveform cycle periods and
Driving source frequency calculation.
Specifically, ifFh=y*b n , then the driving source frequencyfg=4Fh, the waveform cycle period；
IfFh=x*a n , then the driving source frequencyfg=6Fh, the waveform cycle period。
It should be noted that driving source herefgIt is exactlya n ,b n Sitting height frequency component caused by both types is most
2 times of small common multiple.For example,x *a nWithy*b nCombination generate sequence be { 16,12,8,6,4,3,2 ... } or 12,8,
6,4,3,2,1.5 ... }, the least common multiple that 16 and 12 least common multiple is 48,12 and 8 is 24, thenfg=2*48 or 2*
24, it is equivalent tofg=6FhOrfg=4Fh。
When highest frequency component frequency and equal the second pseudo-random sequence, then being equivalent to the first pseudo-random sequence and the
The frequency wave of two pseudo-random sequences matches are as follows:, i.e. it is pseudo- that the frequency wave proportion of the second pseudo-random sequence is higher than first
The frequency wave of random sequence matches, then accordingly in this case, driving source frequencyfgEqual to highest frequency component frequency 4* Fh, a waveform cycle period。
When highest frequency component frequency and equal the first pseudo-random sequence, then being equivalent to the first pseudo-random sequence and the
The frequency wave of two pseudo-random sequences matches are as follows:, i.e. it is pseudo- that the frequency wave proportion of the first pseudo-random sequence is higher than second
The frequency wave of random sequence matches, then accordingly in this case, driving source frequencyfgEqual to highest frequency component frequency 6*Fh, a waveform cycle period。
For the clearer explanation encoded to the embodiment of the present invention for combining form, the embodiment of the present invention is with the first puppet
Random sequence is 1*2nIt is 1.5*2 with the second pseudo-random sequencenFor be illustrated, but the embodiment of the present invention is to specific first
Pseudo-random sequence and the second pseudo-random sequence are not construed as limiting.
Assuming that waveform length needed for target pseudo-random sequenceL=3, i.e.,n=3, then according to the first pseudo-random sequence and
The frequency wave proportion of two pseudo-random sequence 1:2 and the frequency wave of 2:1 match the pseudo-random signal waveform of available two groups of combining forms.
Combined waveform schematic diagram when Fig. 2 is the frequency wave proportion of 1:2 provided in an embodiment of the present invention, as shown in Fig. 2, of the invention
The lowest frequency components frequency that embodiment determinesFl=6Hz, highest frequency component frequencyFh=12Hz, then according to the frequency wave of 1:2
Proportion is formed by driving source frequencyfg=48Hz is 4 times of highest frequency component, a waveform cycle periodT=3/6=0.5s,
It is 3 times of the lowest frequency components period, obtained frequency component is respectively as follows: { 6Hz, 8Hz, 12Hz }, needs to illustrate
It is to be matched according to the frequency wave of 1:2, it means that having first pseudo-random sequence in three frequency components is 1*2n,
Two the second pseudo-random sequences are 1.5*2n, 8Hz=1*23Exactly the first pseudo-random sequence obtains.
And Fig. 3 be 2:1 provided in an embodiment of the present invention frequency wave proportion when combined waveform schematic diagram, as shown in figure 3, this hair
The lowest frequency components frequency that bright embodiment determinesFl=8Hz, highest frequency component frequencyFh=16Hz, then according to the frequency of 2:1
Wave proportion is formed by driving source frequencyfg=96Hz is 6 times of highest frequency component, a waveform cycle periodT=2/8=
0.25s is 2 times of lowest frequency components period, and obtained frequency component is respectively as follows: { 8Hz, 12Hz, 16Hz }, needs
Illustrate, matched according to the frequency wave of 2:1, it means that being there are two the first pseudo-random sequence in three frequency components
1*2n, second pseudo-random sequence is 1.5*2n, 12Hz=1.5*23Exactly the second pseudo-random sequence obtains.
So different frequency wave proportions it is combined go out combination output can be found in Fig. 3, Fig. 4, anabolic process quickly, efficiently,
Simply, it can be applied in various electric exploration signal transmitting equipment.
On the basis of the above embodiments, the method also includes:
Based on driving source frequencyfgValue, adjustment signal frequency acquisitionfs= fg*G, to improve sampling density；
Wherein,GFor the default natural number greater than 2.
By above-described embodiment content it is found that the embodiment of the present invention can design meet pseudorandomcode rule any group
The pseudo-random signal of conjunction form.In the design process, in order to guarantee the precision of output code flow, the embodiment of the invention provides one kind
Adjustment signal frequency acquisition guarantees the precision of output code flow to improve the mode of sampling density.
Specifically, the signal acquisition frequency of design of the embodiment of the present inventionfs= fg*G, whereinGFor the default nature greater than 2
Number, by adjustingGThe value of parameter controls the value of signal acquisition frequency, thus achieve the purpose that the precision for guaranteeing output code flow,
SpecificallyGParameter can be configured according to the actual situation, be not especially limited to this embodiment of the present invention.
Fig. 4 is a kind of pseudo-random signal hybrid coding system construction drawing provided in an embodiment of the present invention, as shown in figure 4, institute
The system of stating includes:
Detection module 410 is for echo signal waveform needed for detecting acquisition electromagnetic survey engineering；
Coding module 420 is used to mix the first pseudo-random sequence and the second pseudo-random sequence according to preset frequency wave proportion
Coding to export target pseudo-random sequence, and carries out geophysical exploration according to the target pseudo-random sequence, and the target is pseudo-
The waveform of random sequence corresponds to the echo signal waveform；
First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor preset constant.
Specifically how pseudo-random signal hybrid coding can be used for executing by detection module 410 and coding module 420
The technical solution of pseudo-random signal hybrid coding embodiment of the method shown in FIG. 1, it is similar that the realization principle and technical effect are similar, herein
It repeats no more.
A kind of pseudo-random signal hybrid coding system provided in an embodiment of the present invention, pass through byx*a n The sequence of form withy* b n The sequence of form is combined according to preset frequency wave proportion, to generate any combination shape for meeting pseudorandomcode rule
The target pseudo-random signal of formula.Generating process is convenient, general, and has passed through the certificate authenticity of engineering practice, works well.
The embodiment of the present invention provides a kind of pseudo-random signal hybrid encoding device, comprising: at least one processor；And with
At least one processor of the processor communication connection, in which:
Fig. 5 is the structural block diagram of pseudo-random signal hybrid encoding device provided in an embodiment of the present invention, referring to Fig. 5, it is described it is pseudo- with
Machine signal hybrid encoding device, comprising: processor (processor) 510, communication interface (Communications
Interface) 520, memory (memory) 530 and bus 540, wherein processor 510, communication interface 520, memory 530
Mutual communication is completed by bus 540.Processor 510 can call the logical order in memory 530, as follows to execute
Method: the first pseudo-random sequence and the second pseudo-random sequence are matched according to preset frequency wave and carry out hybrid coding, to export mesh
Mark pseudo-random sequence；First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor
Preset constant.
The embodiment of the present invention discloses a kind of computer program product, and the computer program product is non-transient including being stored in
Computer program on computer readable storage medium, the computer program include program instruction, when described program instructs quilt
When computer executes, computer is able to carry out method provided by above-mentioned each method embodiment, for example, by the first pseudorandom
Sequence and the second pseudo-random sequence are matched according to preset frequency wave carries out hybrid coding, to export target pseudo-random sequence；It is described
First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor preset constant.
The embodiment of the present invention provides a kind of non-transient computer readable storage medium, the non-transient computer readable storage
Medium storing computer instruction, the computer instruction make the computer execute side provided by above-mentioned each method embodiment
Method, for example, the first pseudo-random sequence and the second pseudo-random sequence are matched according to preset frequency wave and carry out hybrid coding, with
Export target pseudo-random sequence；First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、 y、bFor preset constant.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of pseudo-random signal hybrid coding method characterized by comprising
Echo signal waveform needed for detection obtains electromagnetic survey engineering；
First pseudo-random sequence and the second pseudo-random sequence are matched according to preset frequency wave and carry out hybrid coding, to export target
Pseudo-random sequence, and geophysical exploration, the waveform of the target pseudo-random sequence are carried out according to the target pseudo-random sequence
The corresponding echo signal waveform；
First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor preset constant.
2. the method according to claim 1, wherein described by the first pseudo-random sequence and the second pseudo-random sequence
Progress hybrid coding is matched according to preset frequency wave to specifically include to export target pseudo-random sequence:
Based in first pseudo-random sequencexWithaValue and second pseudo-random sequence inyWithbValue, determine
Coding form；
Based on the coding form, the corresponding driving source frequency of corresponding encoded form and waveform cycle period are calculated, with output
Target pseudo-random sequence.
3. according to the method described in claim 2, it is characterized in that, based in first pseudo-random sequencexWithaValue with
And in second pseudo-random sequenceyWithbValue, determine coding form, specifically include:
Whenx=yAnda=bWhen, determine the coding form for citation form coding；
Whenx=0Ory=0When, determine the coding form for citation form coding；
Whenx≠0、y≠0、x≠yAnda≠bWhen, determine the coding form for combining form coding.
4. according to the method described in claim 3, it is characterized in that, described be based on the coding form, calculating corresponding encoded shape
The corresponding driving source frequency of formula and waveform cycle period, to export target pseudo-random sequence, comprising:
If the coding form is citation form coding, it is determined that the frequency of lowest frequency components needed for the target pseudo-random sequence
RateFlAnd highest frequency component frequencyFh, and calculate the driving source frequencyfg=Fh, the waveform cycle period。
5. according to the method described in claim 3, it is characterized in that, described be based on the coding form, calculating corresponding encoded shape
The corresponding driving source frequency of formula and waveform cycle period, to export target pseudo-random sequence, comprising:
If the coding form is combining form coding, it is based on first pseudo-random sequence and second pseudo-random sequence
Preset frequency wave proportion, lowest frequency components frequency needed for determining the target pseudo-random sequenceFlAnd highest frequency point
Measure frequencyFh；
Based on the lowest frequency components frequencyFl, the waveform cycle period is calculated, and based on the highest frequency component frequency
RateFh, calculate the driving source frequency.
6. according to the method described in claim 5, it is characterized in that, being based on the lowest frequency components frequencyFl, described in calculating
The waveform cycle period, and it is based on the highest frequency component frequencyFh, the driving source frequency is calculated, is specifically included:
IfFh=y*b n , then the driving source frequencyfg=4Fh, the waveform cycle period；
IfFh=x*a n , then the driving source frequencyfg=6Fh, the waveform cycle period。
7. according to the method described in claim 2, it is characterized in that, the method also includes:
Based on driving source frequencyfgValue, adjustment signal frequency acquisitionfs=fg*G, to improve sampling density；
Wherein,GFor the default natural number greater than 2.
8. a kind of pseudo-random signal hybrid coding system characterized by comprising
Detection module, for echo signal waveform needed for detecting acquisition electromagnetic survey engineering；
Coding module, for the first pseudo-random sequence and the second pseudo-random sequence to be carried out mixing volume according to preset frequency wave proportion
Code to export target pseudo-random sequence, and carries out geophysical exploration according to the target pseudo-random sequence, the target puppet with
The waveform of machine sequence corresponds to the echo signal waveform；
First pseudo-random sequence isx*a n , second pseudo-random sequence isy*b n , whereinx、a、y、bFor preset constant.
9. a kind of pseudo-random signal hybrid encoding device, which is characterized in that including memory and processor, the processor and
The memory completes mutual communication by bus；The memory, which is stored with, to be referred to by the program that the processor executes
It enables, the processor calls described program instruction to be able to carry out the method as described in claim 1 to 7 is any.
10. a kind of non-transient computer readable storage medium, which is characterized in that the non-transient computer readable storage medium is deposited
Computer instruction is stored up, the computer instruction makes the computer execute method as described in any one of claim 1 to 7.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060973A (en) * | 2019-12-05 | 2020-04-24 | 中国船舶重工集团公司第七研究院 | WEM signal coding method |
| CN111505722A (en) * | 2020-04-27 | 2020-08-07 | 山东大学 | Logarithmic non-uniform pseudorandom electromagnetic exploration signal generation method and system |
| WO2021218524A1 (en) * | 2020-04-27 | 2021-11-04 | 山东大学 | High-order pseudo-random electromagnetic exploration signal generation method and system |
| CN115086122A (en) * | 2022-07-22 | 2022-09-20 | 山东大学 | Ground communication method and system based on logarithmic non-uniform high-order pseudo-random signal |
| CN115794028A (en) * | 2023-02-13 | 2023-03-14 | 山东大学 | Amplitude-targeted enhanced pseudo-random signal construction method, system, medium and equipment |
| US11983511B2 (en) | 2020-04-27 | 2024-05-14 | Shandong University | Method and system for generating high-order pseudo-random electromagnetic exploration signal |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325031A (en) * | 2000-05-19 | 2001-12-05 | 何继善 | Electrical active-source frequency domain exploration method |
| US20070294508A1 (en) * | 2006-06-20 | 2007-12-20 | Sussman Myles A | Parallel pseudorandom number generation |
| US7639725B1 (en) * | 2004-03-26 | 2009-12-29 | Wilson Michael L | System and method for multi-phase composite PN code generation |
| CN103440119A (en) * | 2013-07-08 | 2013-12-11 | 中国航空无线电电子研究所 | M sequence generator-based primitive polynomial pseudo-random sequence generator |
| CN205749930U (en) * | 2016-06-02 | 2016-11-30 | 桂林电子科技大学 | A kind of mining VHD electrical prospecting apparatus self-adapting data acquisition system |
| CN106470046A (en) * | 2015-08-14 | 2017-03-01 | 宜春市等比科技有限公司 | A kind of utilization 4b/6b technology and the method with double pseudo-random code spread-spectrum |
| CN107769842A (en) * | 2016-08-17 | 2018-03-06 | 北京三星通信技术研究有限公司 | Interleaved sequence construction, the information processing method based on intertexture and transmitting, receiver |
-
2018
- 2018-11-05 CN CN201811309318.2A patent/CN109005005B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325031A (en) * | 2000-05-19 | 2001-12-05 | 何继善 | Electrical active-source frequency domain exploration method |
| CN1163764C (en) * | 2000-05-19 | 2004-08-25 | 何继善 | Electrical active-source frequency domain exploration method |
| US7639725B1 (en) * | 2004-03-26 | 2009-12-29 | Wilson Michael L | System and method for multi-phase composite PN code generation |
| US20070294508A1 (en) * | 2006-06-20 | 2007-12-20 | Sussman Myles A | Parallel pseudorandom number generation |
| CN103440119A (en) * | 2013-07-08 | 2013-12-11 | 中国航空无线电电子研究所 | M sequence generator-based primitive polynomial pseudo-random sequence generator |
| CN106470046A (en) * | 2015-08-14 | 2017-03-01 | 宜春市等比科技有限公司 | A kind of utilization 4b/6b technology and the method with double pseudo-random code spread-spectrum |
| CN205749930U (en) * | 2016-06-02 | 2016-11-30 | 桂林电子科技大学 | A kind of mining VHD electrical prospecting apparatus self-adapting data acquisition system |
| CN107769842A (en) * | 2016-08-17 | 2018-03-06 | 北京三星通信技术研究有限公司 | Interleaved sequence construction, the information processing method based on intertexture and transmitting, receiver |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060973A (en) * | 2019-12-05 | 2020-04-24 | 中国船舶重工集团公司第七研究院 | WEM signal coding method |
| CN111505722A (en) * | 2020-04-27 | 2020-08-07 | 山东大学 | Logarithmic non-uniform pseudorandom electromagnetic exploration signal generation method and system |
| CN111505722B (en) * | 2020-04-27 | 2021-04-16 | 山东大学 | Logarithmic non-uniform pseudorandom electromagnetic exploration signal generation method and system |
| WO2021218525A1 (en) * | 2020-04-27 | 2021-11-04 | 山东大学 | Logarithmic non-uniform pseudorandom electromagnetic exploring signal generation method and system |
| WO2021218524A1 (en) * | 2020-04-27 | 2021-11-04 | 山东大学 | High-order pseudo-random electromagnetic exploration signal generation method and system |
| US11983511B2 (en) | 2020-04-27 | 2024-05-14 | Shandong University | Method and system for generating high-order pseudo-random electromagnetic exploration signal |
| CN115086122A (en) * | 2022-07-22 | 2022-09-20 | 山东大学 | Ground communication method and system based on logarithmic non-uniform high-order pseudo-random signal |
| CN115794028A (en) * | 2023-02-13 | 2023-03-14 | 山东大学 | Amplitude-targeted enhanced pseudo-random signal construction method, system, medium and equipment |
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