CN104407342B - Utilize active sonar Frequency Hopping Signal production method and the device of sperm whale group's sound - Google Patents
Utilize active sonar Frequency Hopping Signal production method and the device of sperm whale group's sound Download PDFInfo
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- CN104407342B CN104407342B CN201410722629.7A CN201410722629A CN104407342B CN 104407342 B CN104407342 B CN 104407342B CN 201410722629 A CN201410722629 A CN 201410722629A CN 104407342 B CN104407342 B CN 104407342B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/537—Counter-measures or counter-counter-measures, e.g. jamming, anti-jamming
Abstract
The invention belongs to acquisition of signal field, the ability hidden for improving the camouflage of active sonar sound source, reduces its probability being trapped；Transmitting signal is made to have the superior function close to Costas frequency hopping rectangular pulse signal；For this, the present invention adopts the technical scheme that, utilize active sonar Frequency Hopping Signal production method and the device of sperm whale group's sound, comprise the following steps: the first step: the Energy maximum value Frequency point second step of definition pulse signal: the production method of active sonar Costas Like Frequency Hopping Signal: the transmission order needing to refer between sequences of pulsed signals group by application is for continuously or ping-pong.Utilize the active sonar Frequency Hopping Signal generation device of sperm whale group's sound, including: command interface, whale sound Costas code generator, whale ping Sample Storehouse memory, whale sound amplify follower, voicing sensor.Present invention is mainly applied to acquisition of signal.
Description
Technical field
The invention belongs to acquisition of signal field；Specifically, relate to the use of and utilize the active sonar Frequency Hopping Signal of sperm whale group's sound to produce
Method and device.
Technical background
The source emission signal form that conventional active sonar system uses typically has single carrier frequency rectangular pulse signal, linear frequency modulation rectangle
Pulse signal, pseudorandomcode phase modulation rectangular pulse train signals etc..Single carrier frequency rectangular pulse signal easily produces, is easy to process,
But at distance rate and velocity resolution two aspect, it can not be taken into account simultaneously.Linear FM rectangular pulse signal can realize pulse pressure
Contracting, solves the contradiction between signal energy and range resolution ratio, but owing to there is coupled relation between its distance and speed,
Associating high-resolution still cannot be provided.Than above two kinds of signals, the fuzzy letter of pseudorandomcode phase modulation rectangular pulse train signals
Number closer to preferable drawing pin shape, can obtain simultaneously rise from high speed resolution ratio, but its side is higher, and detectability is subject to
Arrive restriction.
And Costas Frequency Hopping Signal (see document [1-2]) has a preferable ambiguity function close to drawing pin shape: main lobe is high and sharp-pointed, secondary lobe
Low and smooth, and there is not fuzzy secondary lobe and distance-speed coupled problem, thus there is superior performance；Additionally, Costas
Signal, as a kind of Frequency Hopping Signal, has the strongest interference free performance and relatively low intercept probability (the highest disguise).
But, no matter it is single carrier frequency rectangular pulse signal, linear FM rectangular pulse signal, pseudorandomcode phase modulation rectangular pulse
String signal, or Costas Frequency Hopping Signal etc., they broadly fall into the Sonar Signal of routine, all have a following common feature: signal
Envelope is rectangular pulse, and envelope internal modulation signal is single frequency sinusoidal ripple or the sine wave of frequency linearity change, the time-frequency feature of signal
Simply, it is easy to identify, classify and position.These common features make active sound source based on these signal forms be prone to by enemy
Reconnaissance system detects, identifies and follow the tracks of, and becomes the object being hacked, thus its survival ability is constituted serious threat.
For problem above, one aspect of the present invention uses sperm whale group (sperm whales) ping sending out as active sound source
Penetrate signal, improve camouflage and the disguise of sound source；On the other hand, according to feature and the rule of sperm whale group's acoustical signal, to smearing
Fragrant whale group's ping is launched signal and is arranged by certain method, makes the sperm whale group's ping launched have similar
Feature in Costas Frequency Hopping Signal (this type of signal being referred to as Costas-Like signal in the present invention), in order to subsequently through coupling filter
The signal received is processed by wave technology so that it is show the superior function close to Costas signal.
Illustrating: in ocean, most cetacean is all social animal (see document [3-5]), they can ceaselessly during activity
Send pulse signal, the envelope change at random of these pulse signals, there is no fixing rule, envelope internal modulation signal is complicated
Broadband signal, signal non-stationary, time-frequency characteristic is complicated；Therefore, have with conventional sonar signals and the most significantly distinguish,
It is difficult to be identified as sonar signals.
[1] Wei Xizhang, Liu Zhen, Deng Bin, Li Xiang, Costas coding frequency-hopping wideband-radar signal velocity measuring technique research [J]. electronics
Report, 38 (10): 2426-2429,2010.
[2] Yao Jianguo, the application study [J] in multi-user's radar system of Huang Qing, the Costas sequence. communication journal, 31 (5): 60-72,2010.
[3]Hal Whitehead and Linda Weilgart,Patterns of visually observable behaviour and vocalizations
in groups of female sperm whales[J],Behaviour,vol.118,no.3/4,pp.275-296,Sep.,1991.
[4]http://www.nmfs.noaa.gov/pr/species/mammals/cetaceans/killerwhale.htm
[5]http://news.nationalgeographic.com/news/2013/13/130425-humpback-whale-culture-behavior-sc
ience-animals/
Summary of the invention
For overcoming the deficiencies in the prior art, improve the ability that the camouflage of active sonar sound source is hidden, reduce its probability being trapped；Make
Launch signal and there is the superior function close to Costas frequency hopping rectangular pulse signal；To this end, the present invention adopts the technical scheme that,
Utilize the active sonar Frequency Hopping Signal production method of sperm whale group's sound, comprise the following steps:
The first step: the Energy maximum value Frequency point of definition pulse signal
The different pulse signal of multi-signal envelope, and the energy of variety classes pulse signal can be sent according to the most same sperm whale
Amount maximum Frequency point is mainly distributed between 100Hz-12KHz；Autocorrelation between identical pulse signal is big, variety classes
Cross correlation between pulse signal is little, 2. the high-energy Frequency point only one of which of some style pulse acoustical signals, other types
The high-energy Frequency point of pulse sound signal has two, and the high-energy Frequency point of some other style pulse acoustical signal has multiple；
Defining dissimilar pulse sound signal is to have different envelope, the pulse signal of different-energy maximum Frequency point；
The Energy maximum value Frequency point of definition pulse signal refers to a pulse signal is carried out fast Fourier transform (Fast Fourier
Transformation, FFT) after, the Frequency point f corresponding at the Amplitude maxima obtainedb(b=1,2,3, L, and b≤10000)；
Second step: the production method of active sonar Costas-Like Frequency Hopping Signal:
Approximation between the Energy maximum value Frequency point of some pulse signals is found to meet following relation, i.e. fi,2≈2fi,1, fi,3≈3fi,1,
fi,4≈4fi,1, fi,5≈5fi,1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1；Wherein fi,k≠fj,k, i ≠ j, k's is big
I is set according to actual needs, and definition fi,1,fi,2,fi,3,fi,4,L,fi,kIt it is one group；
Multiple approximation that meets between above-mentioned Energy maximum value Frequency point is selected to meet following relation, i.e. fi,2≈2fi,1, fi,3≈3fi,1,
fi,4≈4fi,1, fi,5≈5fi,1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1Pulse signal group；With fi,kSize
For foundation, the pulse signal in often group is arranged by Costas encoding law, formed and multiple be similar to Costas frequency hopping rule
Sequences of pulsed signals group；
Will be similar to that the sequences of pulsed signals group of Costas frequency hopping rule is referred to as Costas-Like Frequency Hopping Signal；
After needs arrange, it is transmitted organizing Costas-Like Frequency Hopping Signal by active sonar sound system by application more.
The transmission order referring between sequences of pulsed signals group is needed to be continuous or ping-pong by application.
Utilize the active sonar Frequency Hopping Signal generation device of sperm whale group's sound, including: command interface, whale sound Costas encode generation
Device, whale ping Sample Storehouse memory, whale sound amplify follower, voicing sensor；The control command that command interface will receive
It is sent to whale sound Costas code generator；Whale sound Costas code generator is according to the instruction received, from whale ping sample
Storehouse memorizer selects meet the whale ping group that application requires, then, more selected whale ping group is pressed Costas
After coded system completes coding, after being sent to the amplification follower amplification of whale sound, voicing sensor acoustical signal is sent.
Whale ping Sample Storehouse memory storage has: whale ping group produced by (1) same kind of whale group, and with often
When the Energy maximum value Frequency point of individual pulse signal is foundation, often group whale ping meets the requirement of Costas coding；(2) no
Whale ping group produced by congener whale group, and during with the Energy maximum value Frequency point of each pulse signal for foundation,
Often group whale ping meets the requirement of Costas coding.
Compared with the prior art, the technical characterstic of the present invention and effect:
The present invention provides a kind of active sonar Costas-Like Frequency Hopping Signal production method utilizing sperm whale group's sound, and it can not only
Conventional sonar signals is overcome to be prone to the shortcoming being identified and located, moreover it is possible to make full use of and meet the frequency hopping letter that Costas coding is special
Number superior function.
Present invention have the advantage that (1) utilizes sperm whale group's ping to pretend active sonar sound source, raising sound
The disguise in source；(2) the sperm whale ping composition choosing different high-energy Frequency point meets the jumping of Costas coding characteristic
Frequently signal, makes transmitting signal have the superior function close to Costas frequency hopping rectangular pulse signal.
Accompanying drawing explanation
Fig. 1 shows the acoustical signal of sperm whale group in a period of time provided in the present invention.
Fig. 2 shows putting of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Big figure.
Fig. 3 shows putting of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Big figure.
Fig. 4 shows putting of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Big figure.
Fig. 5 shows putting of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Big figure.
Fig. 6 shows putting of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Big figure.
Fig. 7 illustrates the quick of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Fourier transform result.
Fig. 8 illustrates the quick of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Fourier transform result.
Fig. 9 illustrates the quick of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Fourier transform result.
Figure 10 illustrates the fast of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Speed Fourier transform result.
Figure 11 illustrates the fast of some the sperm whale ping in heretofore described a large amount of sperm whale group's pings
Speed Fourier transform result.
Figure 12 illustrates the autocorrelation result of pulse signal shown in heretofore described Fig. 2.
Figure 13 illustrates the autocorrelation result of pulse signal shown in heretofore described Fig. 5.
Figure 14 illustrates the cross correlation results of pulse signal shown in heretofore described Fig. 2 and Fig. 5.
Figure 15 illustrates the heretofore described active sonar Costas-Like Frequency Hopping Signal generation device utilizing sperm whale group's sound.
Figure 16 illustrates that heretofore described first group approximation meets fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1,
fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1In the ping of relation, the fast Fourier of the 1st ping
Transformation results, it is also shown for the Energy maximum value Frequency point of this ping simultaneously.
Figure 17 illustrates that heretofore described first group approximation meets fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1,
fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1In the ping of relation, the fast Fourier of the 2nd ping
Transformation results, it is also shown for the Energy maximum value Frequency point of this ping simultaneously.
Figure 18 illustrates that heretofore described first group approximation meets fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1,
fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1In the ping of relation, the fast Fourier of the 3rd ping
Transformation results, it is also shown for the Energy maximum value Frequency point of this ping simultaneously.
Figure 19 illustrates that heretofore described first group approximation meets fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1,
fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1In the ping of relation, the fast Fourier of the 4th ping
Transformation results, it is also shown for the Energy maximum value Frequency point of this ping simultaneously.
Figure 20 illustrates that heretofore described first group approximation meets fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1,
fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1In the ping of relation, the fast Fourier of the 5th ping
Transformation results, it is also shown for the Energy maximum value Frequency point of this ping simultaneously.
Figure 21 illustrates that heretofore described first group approximation meets fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1,
fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1In the ping of relation, the fast Fourier of the 6th ping
Transformation results, it is also shown for the Energy maximum value Frequency point of this ping simultaneously.
Figure 22 illustrates that heretofore described first group approximation meets fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1,
fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1In the ping of relation, the fast Fourier of the 7th ping
Transformation results, it is also shown for the Energy maximum value Frequency point of this ping simultaneously.
Figure 23 illustrates heretofore described Costas encoding law.
Figure 24 illustrates heretofore described two Costas-Like Frequency Hopping Signal group, and they are alternately passed through active sonar sound
Origin system is transmitted away, and wherein, 1 is first group of Costas-Like Frequency Hopping Signal group, and 2 is that second group of Costas-Like jumps
Frequently signal group.
Detailed description of the invention
For the problems of the prior art, the present invention utilizes whale acoustical signal as Active Acoustic source signal so that it is be mistaken as into true
The signal that sends of whale, play the effect of camouflage.
(1), in the present invention, sperm whale group's acoustical signal is used to come as source emission signal, the signal making enemy take for receiving
From sperm whale group rather than active sonar sound source, play the effect of camouflage sound source, improve the ability that the camouflage of active sonar sound source is hidden,
Reduce its probability being trapped；
(2) in the present invention, by sperm whale group's acoustical signal is analyzed comprehensively, following features and rule have been obtained: 1. same
One sperm whale can send the different pulse signal of multi-signal envelope, and after these pulse signals are carried out spectrum analysis, sends out
The Energy maximum value Frequency point of existing variety classes pulse signal is mainly distributed between 100Hz-12KHz；Variety classes pulse signal
Between cross correlation little；2. the high-energy Frequency point only one of which of some style pulse acoustical signals, other style pulse sound is believed
Number high-energy Frequency point have two, the high-energy Frequency point of some other style pulse acoustical signal has multiple；The present invention utilizes and smears
Above-mentioned 3 features of fragrant whale group's acoustical signal and rule, launch signal to sperm whale group's ping and arrange by certain method,
The sperm whale group's ping launched is made to have the advantages that to be similar to Costas Frequency Hopping Signal, in order to subsequently through coupling filter
The signal received is processed by wave technology so that it is show the superior function close to Costas frequency hopping rectangular pulse signal；
(3), in the present invention, on the one hand, utilize sperm whale group's ping that active sonar sound source is pretended, sound source is improved
Disguise；On the other hand, the sperm whale ping composition choosing different high-energy Frequency point meets Costas coding characteristic
Frequency Hopping Signal, make transmitting signal have the superior function close to Costas frequency hopping rectangular pulse signal.
For overcoming the deficiencies in the prior art, the present invention provides a kind of active sonar Frequency Hopping Signal production method utilizing sperm whale group's sound,
It can not only overcome conventional sonar signals to be prone to the shortcoming being identified and located, moreover it is possible to makes full use of and meets Costas coding spy
The superior function of some Frequency Hopping Signal.
Present invention have the advantage that (1) utilizes sperm whale group's ping to pretend active sonar sound source, raising sound
The disguise in source；(2) the sperm whale ping composition choosing different high-energy Frequency point meets the jumping of Costas coding characteristic
Frequently signal, makes transmitting signal have the superior function close to Costas frequency hopping rectangular pulse signal.
The present invention adopts the technical scheme that, utilizes the active sonar Frequency Hopping Signal production method of sperm whale group's sound, including:
The first step: the result of study explanation of sperm whale mass-sending sound feature and rule:
Fig. 1 shows an example of sperm whale group's acoustical signal of a period of time；By a large amount of sperm whale group's sound for a long time are believed
Number analyze comprehensively, obtained following features and rule: the most same sperm whale can send the different arteries and veins of multi-signal envelope
Rush signal (the such as pulse signal shown in Fig. 2-6), and after these pulse signals are carried out spectrum analysis, find variety classes pulse
The Energy maximum value Frequency point of signal is mainly distributed between 100Hz-12KHz that (such as the pulse signal energy shown in Fig. 7-11 is
It is worth greatly Frequency point)；Autocorrelation between identical pulse signal is big, and the autocorrelation result of such as Fig. 2 and Fig. 5 is respectively such as Figure 12
Shown in 13；Cross correlation between variety classes pulse signal is little, the cross-correlation knot of such as pulse signal shown in Fig. 2 Yu Fig. 5
Fruit is as shown in figure 14；2. high-energy Frequency point only one of which (such as Fig. 7 and Fig. 8 only one of which of some style pulse acoustical signals
High-energy Frequency point), the high-energy Frequency point of other style pulse acoustical signals has two, and (such as Fig. 9 and Figure 10 has two high energy
Amount Frequency point), the high-energy Frequency point of some other style pulse acoustical signal has multiple (such as Figure 11 has multiple high-energy Frequency point)；
Further, heretofore described dissimilar pulse sound signal refers to have different envelope, different-energy maximum frequency
The pulse signal of rate point；
Further, the Energy maximum value Frequency point of pulse signal refers to a pulse signal is carried out fast Fourier transform (Fast
Fourier Transformation, FFT) after, the Frequency point corresponding at the Amplitude maxima obtained
fb(b=1,2,3, L, and b≤10000), such as the Frequency point corresponding at the Amplitude maxima in Fig. 7-8；
Second step: the production method of active sonar Costas-Like Frequency Hopping Signal:
Energy maximum value Frequency point f due to variety classes pulse signalb(b=1,2,3, L, and b≤10000) are mainly distributed on
Between 100Hz-12KHz, by a large amount of pulse signals being analyzed and are observed discovery: in numerous pulse signals, have one
Between the Energy maximum value Frequency point of a little pulse signals, approximation meets following relation: fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1,
fi,5≈5fi,1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1；Wherein fi,k≠fj,k, the big I of i ≠ j, k is according to reality
Border needs to be set, and definition fi,1,fi,2,fi,3,fi,4,L,fi,kIt it is one group；
Further, multiple approximation that meets between above-mentioned Energy maximum value Frequency point is selected to meet fi,2≈2fi,1, fi,3≈3fi,1,
fi,4≈4fi,1, fi,5≈5fI, 1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1The pulse signal group of relation；With fi,k's
Size is foundation, is arranged by Costas encoding law by the pulse signal in often group, is formed and multiple is similar to Costas frequency hopping
The sequences of pulsed signals group of rule；Note: putting in order between sequences of pulsed signals group can select according to reality application needs
And design；
Further, will be similar to that the sequences of pulsed signals group of Costas frequency hopping rule is referred to as Costas-Like Frequency Hopping Signal；
Further, after needs arrange, entered organizing Costas-Like Frequency Hopping Signal by active sonar sound system by application more
Row sends.
3rd step: utilize the active sonar Costas-Like Frequency Hopping Signal generation device of sperm whale group's sound:
Utilize the active sonar Costas-Like Frequency Hopping Signal generation device of sperm whale group's sound as shown in figure 15；
Further, command interface 1 can transmit control command to whale sound Costas code generator 2, produces whale sound Costas coding
The duty of raw device 2 plays control action；
Further, whale sound Costas code generator 2 is according to the instruction coming from command interface 1 received, from whale ping
Sample Storehouse 4 selects meet the whale ping group that application requires, then, more selected whale ping group is pressed Costas
After coded system completes coding, it is sent to whale sound and amplifies follower 3；
Further, whale ping Sample Storehouse 4 comprises: whale ping group produced by (1) same kind of whale group, and with
When the Energy maximum value Frequency point of each pulse signal is foundation, often group whale ping meets the requirement of Costas coding；(2)
Whale ping group produced by different types of whale group, and during with the Energy maximum value Frequency point of each pulse signal for foundation,
Often group whale ping meets the requirement of Costas coding；
Further, whale sound amplifies follower and is used for the signal coming from whale sound Costas code generator 2 is carried out power amplification,
And use voicing sensor acoustical signal to be sent.
The present invention has the following technical effect that
(1), in the present invention, sperm whale group's acoustical signal is used to come as source emission signal, the signal making enemy take for receiving
From sperm whale group rather than active sonar sound source, play the effect of camouflage sound source, improve the ability that the camouflage of active sonar sound source is hidden,
Reduce its probability being trapped；
(2) in the present invention, by sperm whale group's acoustical signal is analyzed comprehensively, following features and rule have been obtained: 1. same
One sperm whale can send the different pulse signal of multi-signal envelope, and after these pulse signals are carried out spectrum analysis, sends out
The Energy maximum value Frequency point of existing variety classes pulse signal is mainly distributed between 100Hz-12KHz；Variety classes pulse signal
Between cross correlation little；2. the high-energy Frequency point only one of which of some style pulse acoustical signals, other style pulse sound is believed
Number high-energy Frequency point have two, the high-energy Frequency point of some other style pulse acoustical signal has multiple；The present invention utilizes and smears
Above-mentioned 3 features of fragrant whale group's acoustical signal and rule, launch signal to sperm whale group's ping and arrange by certain method,
The sperm whale group's ping launched is made to have the advantages that to be similar to Costas Frequency Hopping Signal, in order to subsequently through coupling filter
The signal received is processed by wave technology so that it is show the superior function close to Costas frequency hopping rectangular pulse signal；
(3), in the present invention, on the one hand, utilize sperm whale group's ping that active sonar sound source is pretended, sound source is improved
Disguise；On the other hand, the sperm whale ping composition choosing different high-energy Frequency point meets Costas coding characteristic
Frequency Hopping Signal, make transmitting signal have the superior function close to Costas frequency hopping rectangular pulse signal.
The present invention is further described below in conjunction with the accompanying drawings with detailed description of the invention.
For overcoming the deficiencies in the prior art, the present invention provides a kind of active sonar Costas-Like frequency hopping utilizing sperm whale group's sound to believe
Number production method, it can not only overcome conventional sonar signals to be prone to the shortcoming being identified and located, moreover it is possible to makes full use of and meets
The superior function of the Frequency Hopping Signal that Costas coding is special.
Present invention have the advantage that (1) utilizes sperm whale group's ping to pretend active sonar sound source, raising sound
The disguise in source；(2) the sperm whale ping composition choosing different high-energy Frequency point meets the jumping of Costas coding characteristic
Frequently signal, makes transmitting signal have the superior function close to Costas frequency hopping rectangular pulse signal.
The present invention is achieved in that
The first step: sperm whale mass-sending sound feature and the result of study of rule:
Fig. 1 shows an example of sperm whale group's acoustical signal of a period of time；By a large amount of sperm whale group's sound for a long time are believed
Number analyze comprehensively, obtained following features and rule: the most same sperm whale can send the different arteries and veins of multi-signal envelope
Rush signal (the such as pulse signal shown in Fig. 2-6), and after these pulse signals are carried out spectrum analysis, find variety classes pulse
The Energy maximum value Frequency point of signal is mainly distributed between 100Hz-12KHz that (such as the pulse signal energy shown in Fig. 7-11 is
It is worth greatly Frequency point)；Autocorrelation between identical pulse signal is big, and the autocorrelation result of such as Fig. 2 and Fig. 5 is respectively such as Figure 12
Shown in 13；Cross correlation between variety classes pulse signal is little, the cross-correlation knot of such as pulse signal shown in Fig. 2 Yu Fig. 5
Fruit is as shown in figure 14；2. high-energy Frequency point only one of which (such as Fig. 7 and Fig. 8 only one of which of some style pulse acoustical signals
High-energy Frequency point), the high-energy Frequency point of other style pulse acoustical signals has two, and (such as Fig. 9 and Figure 10 has two high energy
Amount Frequency point), the high-energy Frequency point of some other style pulse acoustical signal has multiple (such as Figure 11 has multiple high-energy Frequency point)；
Further, the Energy maximum value Frequency point of pulse signal refers to a pulse signal is carried out fast Fourier transform (Fast
Fourier Transformation, FFT) after, the Frequency point corresponding at the Amplitude maxima obtained
fb(b=1,2,3, L, and b≤10000), such as the Frequency point corresponding at the Amplitude maxima in Fig. 7-8；
Second step: the production method of active sonar Costas-Like Frequency Hopping Signal:
Energy maximum value Frequency point f due to variety classes pulse signalb(b=1,2,3, L, and b≤10000) are mainly distributed on
Between 100Hz-12KHz, make discovery from observation: in numerous pulse signals, have the Energy maximum value frequency of some pulse signals
Between rate point, approximation meets following relation: fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1, fi,6≈6fi,1,
fi,7≈7fi,1..., fi,k≈kfi,1；Wherein fi,k≠fj,k, the big I of i ≠ j, k is set according to actual needs, and fixed
Justice fi,1,fi,2,fi,3,fi,4,L,fi,kIt it is one group；.
Further, multiple approximation that meets between above-mentioned Energy maximum value Frequency point is selected to meet fi,2≈2fi,1, fi,3≈3fi,1,
fi,4≈4fi,1, fi,5≈5fi,1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1The pulse signal group of relation；With fi,k's
Size is foundation, is arranged by Costas encoding law by the pulse signal in often group, is formed and multiple is similar to Costas frequency hopping
The sequences of pulsed signals group of rule；Note: putting in order between sequences of pulsed signals group can need according to reality application and select
Select and design；
Further, will be similar to that the sequences of pulsed signals group of Costas frequency hopping rule is referred to as Costas-Like Frequency Hopping Signal；
Further, after needs arrange, entered organizing Costas-Like Frequency Hopping Signal by active sonar sound system by application more
Row sends.
The present invention will be further described with embodiment below in conjunction with the accompanying drawings:
In the present invention, by a specific example, the present invention to be made more specifically and detailed description；
Further, present invention feature based on acquired sperm whale group's acoustical signal and rule: in numerous pulse signals, have
Between the Energy maximum value Frequency point of some pulse signals, approximation meets following relation: fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1,
fi,5≈5fi,1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1；Wherein fi,k≠fj,k, the big I of i ≠ j, k is according to reality
Border needs to be set.
Further, the invention will be further described and explains for a specific example presented below:
First one section of sperm whale group's ping of 3 minutes is observed and is analyzed by the present invention, then by choosing, it is thus achieved that
Two group pulse signals, all approximate between their Energy maximum value Frequency point and meet fi,2≈2fi,1, fi,3≈3fi,1, fi,4≈4fi,1,
fi,5≈5fi,1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1Relation；The Energy maximum value frequency of this two group pulses signal
Point is respectively as follows: first group: 249.9Hz, 499.2Hz, 749.3Hz, 996.6Hz, 1252Hz, 1499Hz, 1999Hz；
Second group: 312.2Hz, 624Hz, 935.5Hz, 1249Hz, 1562Hz, 1871.6Hz, 2183.8Hz, 2496.5Hz；
Figure 16-22 shows a concrete instance, and it is the fast Fourier transform FFT figure of the first group pulse signal, also contains simultaneously
Energy maximum value frequency point diagram, can obtain 499.2/249.9 ≈ 2,749.3/249.9 ≈ 3,996.6/249.9 ≈ 4,1252/249.9 from figure
≈ 5,1499/249.9 ≈ 6,1999/249.9 ≈ 7；Note: sperm whale group's ping of above-mentioned 3 minutes is an example,
In actual applications, the length of selected sperm whale group's ping time it is not limited to；Above-mentioned two obtained group pulse letters
Number, a most simply example, in actual applications, it is only necessary to the Energy maximum value Frequency point of selected pulse signal meets
The requirement of Costas coding.
Further, with fi,kSize be foundation, two group pulse signals described above are arranged again by Costas encoding law
Row, form two groups of sequences of pulsed signals groups being similar to Costas frequency hopping rule, and such sequences of pulsed signals group are referred to as
Costas-Like Frequency Hopping Signal group；
Further, such as, choose in the pulse signal corresponding to front 6 Energy maximum value Frequency points in first group and second group
The pulse signal corresponding to front 6 Energy maximum value Frequency points；Then, the signal in first group and second group is pressed in Figure 23
Shown Costas encoding law arranges, and forms two Costas-Like Frequency Hopping Signal groups respectively；
Further, the two Costas-Like Frequency Hopping Signal group is alternately passed through active sonar sound system and is transmitted away,
As shown in figure 24, wherein in Figure 24,1 represents first group of Costas-Like Frequency Hopping Signal group, and 2 represent second group of Costas-Like
Frequency Hopping Signal group；
Note: the transmission order between sequences of pulsed signals group can need according to reality application and selects and design, without symbol
Closing and state the mode alternately sent, above-mentioned ping-pong is a concrete example；
3rd step: utilize the active sonar Costas-Like Frequency Hopping Signal generation device of sperm whale group's sound:
Utilize the active sonar Costas-Like Frequency Hopping Signal generation device of sperm whale group's sound as shown in figure 15；
Further, command interface 1 can transmit control command to whale sound Costas code generator 2, produces whale sound Costas coding
The duty of raw device 2 plays control action；
Further, whale sound Costas code generator 2 is according to the instruction coming from command interface 1 received, from whale ping
Sample Storehouse 4 selects meet the whale ping group that application requires, then, more selected whale ping group is pressed Costas
After coded system completes coding, it is sent to whale sound and amplifies follower 3；
Further, whale ping Sample Storehouse 4 comprises: whale ping group produced by (1) same kind of whale group, and with
When the Energy maximum value Frequency point of each pulse signal is foundation, often group whale ping meets the requirement of Costas coding；(2)
Whale ping group produced by different types of whale group, and during with the Energy maximum value Frequency point of each pulse signal for foundation,
Often group whale ping meets the requirement of Costas coding；
Further, whale sound amplifies follower and is used for the signal coming from whale sound Costas code generator 2 is carried out power amplification, and makes
With voicing sensor, acoustical signal is sent.
Claims (4)
1. utilize an active sonar Frequency Hopping Signal production method for sperm whale group's sound, it is characterized in that, comprise the following steps:
The first step: the Energy maximum value Frequency point of definition pulse signal
The different pulse signal of multi-signal envelope can be sent according to the most same sperm whale, and variety classes pulse signal
Energy maximum value Frequency point is mainly distributed between 100Hz-12KHz；Autocorrelation between identical pulse signal is big, no
Little with the cross correlation between kind pulse signal, the 2. high-energy Frequency point only one of which of some style pulse acoustical signals, separately
The high-energy Frequency point of some style pulse acoustical signals has two, and the high-energy Frequency point of some other style pulse acoustical signal has
Multiple；
Defining dissimilar pulse sound signal is to have different envelope, the pulse signal of different-energy maximum Frequency point；
The Energy maximum value Frequency point of definition pulse signal refers to a pulse signal is carried out fast Fourier transform (Fast
Fourier Transformation, FFT) after, the Frequency point corresponding at the Amplitude maxima obtained
fb, b=1,2,3 ..., and b≤10000；
Second step: the production method of active sonar Costas-Like Frequency Hopping Signal:
Approximation between the Energy maximum value Frequency point of some pulse signals is found to meet following relation, i.e. fi,2≈2fi,1,
fi,3≈3fi,1, fi,4≈4fi,1, fi,5≈5fi,1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1；Wherein
fi,k≠fj,k, the big I of i ≠ j, k is set according to actual needs, and definition fi,1,fi,2,fi,3,fi,4,…,fi,kIt is one
Group；
Multiple approximation that meets between above-mentioned Energy maximum value Frequency point is selected to meet following relation, i.e. fi,2≈2fi,1, fi,3≈3fi,1,
fi,4≈4fi,1, fi,5≈5fi,1, fi,6≈6fi,1, fi,7≈7fi,1..., fi,k≈kfi,1Pulse signal group；With fi,k's
Size is foundation, is arranged by Costas encoding law by the pulse signal in often group, is formed and multiple is similar to Costas
The sequences of pulsed signals group of frequency hopping rule；
Will be similar to that the sequences of pulsed signals group of Costas frequency hopping rule is referred to as Costas-Like Frequency Hopping Signal；
After needs arrange, carry out sending out by active sonar sound system by application by organizing Costas-Like Frequency Hopping Signal more
Send.
Utilize the active sonar Frequency Hopping Signal production method of sperm whale group's sound the most as claimed in claim 1, it is characterized in that, need by application
Transmission order between sequences of pulsed signals group to be referred to is continuous or ping-pong.
3. utilize an active sonar Frequency Hopping Signal generation device for sperm whale group's sound, it is characterized in that, including: command interface, whale sound
Costas code generator, whale ping Sample Storehouse memory, whale sound amplify follower, voicing sensor；Command interface will
The control command received is sent to whale sound Costas code generator；Whale sound Costas code generator is according to receiving
Instruction, selects to meet the whale ping group that application requires, then, then by selected from whale ping Sample Storehouse memory
Whale ping group by Costas coded system complete coding after, be sent to whale sound amplify follower amplify after, by send out
Acoustical signal is sent by sonic transducer.
Utilize the active sonar Frequency Hopping Signal generation device of sperm whale group's sound the most as claimed in claim 3, it is characterized in that, whale ping
Sample Storehouse memory storage has: whale ping group produced by (1) same kind of whale group, and with each pulse signal
Energy maximum value Frequency point when being foundation, often group whale ping meets the requirement of Costas coding；(2) variety classes
Whale group produced by whale ping group, and during with the Energy maximum value Frequency point of each pulse signal for foundation, often group
Whale ping meets the requirement of Costas coding.
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