CN204287476U

CN204287476U - Utilize the active sonar Frequency Hopping Signal generation device of sperm whale group sound

Info

Publication number: CN204287476U
Application number: CN201420748313.0U
Authority: CN
Inventors: 蒋佳佳; 段发阶; 李彦超; 袁建富; 薛俊; 袁文澹; 李宸阳; 黄婷婷; 马凌
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2014-12-02
Filing date: 2014-12-02
Publication date: 2015-04-22
Anticipated expiration: 2024-12-02

Abstract

The utility model belongs to acquisition of signal field, pretending hidden ability, reducing it by the probability intercepted and captured for improving active sonar sound source; Make to transmit the superior function had close to Costas frequency hopping rectangular pulse signal; For this reason, the technical scheme that the utility model is taked is, utilize the active sonar Frequency Hopping Signal generation device of sperm whale group sound, comprising: command interface, whale sound Costas code generator, whale sound pulse Sample Storehouse storer, whale sound amplify follower, voicing sensor; The control command received is sent to whale sound Costas code generator by command interface; Whale sound Costas code generator, according to the instruction received, selects the whale ping group meeting application requirement from whale sound pulse Sample Storehouse storer, after then sending to whale sound to amplify follower amplification, acoustical signal is sent by voicing sensor.The utility model is mainly used in acquisition of signal.

Description

Utilize the active sonar Frequency Hopping Signal generation device of sperm whale group sound

Technical field

The utility model belongs to acquisition of signal field; Specifically, the active sonar Frequency Hopping Signal generation device utilizing sperm whale group sound is related to.

Technical background

The source emission signal form that conventional active sonar system adopts generally has single carrier frequency rectangular pulse signal, linear FM rectangular pulse signal, pseudorandomcode phase modulation rectangular pulse train signals etc.Single carrier frequency rectangular pulse signal easily produces, is convenient to process, but in distance rate and velocity resolution two, it can not take into account simultaneously.Linear FM rectangular pulse signal can realize pulse compression, solves the contradiction between signal energy and range resolution, but there is coupled relation between Distance geometry speed due to it, still cannot provide associating high resolving power.Than two kinds of signals above, the ambiguity function of pseudorandomcode phase modulation rectangular pulse train signals is closer to desirable drawing pin shape, and can obtain high Distance geometry high speed resolution, but its other Office is higher, detectability is restricted simultaneously.

And Costas Frequency Hopping Signal (see document [1-2]) has the desirable ambiguity function close to drawing pin shape: main lobe is high and sharp-pointed, and secondary lobe is low and smooth, and there is not fuzzy secondary lobe and distance-speed coupled problem, thus has superior performance; In addition, Costas signal, as a kind of Frequency Hopping Signal, has very strong interference free performance and lower intercept probability (namely higher disguise).

But, no matter be single carrier frequency rectangular pulse signal, linear FM rectangular pulse signal, pseudorandomcode phase modulation rectangular pulse train signals, or Costas Frequency Hopping Signal etc., they all belong to conventional Sonar Signal, all there is following common feature: signal envelope is rect.p., envelope internal modulation signal is the sine wave of single frequency sinusoidal ripple or frequency linearity change, and the time-frequency feature of signal is simple, is easy to identify, classify and location.These common features make the active sound source based on these signal forms be easy to by the detection of enemy's reconnaissance system, identify and follow the tracks of, and become by the object attacked, thus form serious threat to its viability.

For above problem, the utility model adopts sperm whale group (sperm whales) ping to transmit as active sound source on the one hand, improves camouflage and the disguise of sound source; On the other hand, according to feature and the rule of sperm whale group acoustical signal, sperm whale group sound pulse is transmitted and to arrange by certain method, the sperm whale group ping of launching is made to have the advantages that to be similar to Costas Frequency Hopping Signal (in the utility model, this type of signal being called Costas-Like signal), to process to the received signal subsequently through matched filtering technique, it is made to show superior function close to Costas signal.

Illustrate: in ocean, most cetacean is all social animal (see document [3-5]), they ceaselessly can send pulse signal in the process of activity, the envelope random variation 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 the sonar signals of routine and comparatively significantly distinguish, be not easily 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]. electronic letters, vol, 38 (10): 2426-2429,2010.

[2] applied research of Yao Jianguo, Huang Qing, Costas sequence in multi-user's radar system [J]. communication journal, 31 (5): 60-72,2010.

[3]Hal Whitehead and Linda Weilgart,Patterns of visually observable behaviour and vocalizationsin 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-science-animals/

Summary of the invention

For overcoming the deficiencies in the prior art, improving active sonar sound source and pretending hidden ability, reducing it by the probability intercepted and captured; Make to transmit the superior function had close to Costas frequency hopping rectangular pulse signal; For this reason, the technical scheme that the utility model is taked is, utilize the active sonar Frequency Hopping Signal generation device of sperm whale group sound, comprising: command interface, whale sound Costas code generator, whale sound pulse Sample Storehouse storer, whale sound amplify follower, voicing sensor; The control command received is sent to whale sound Costas code generator by command interface; Whale sound Costas code generator is according to the instruction received, the whale ping group meeting application requirement is selected from whale sound pulse Sample Storehouse storer, then, after more selected whale ping group being completed coding by Costas coded system, after sending to whale sound to amplify follower amplification, by voicing sensor, acoustical signal is sent.

Whale sound pulse Sample Storehouse storer stores: the whale ping group that the whale group of (1) one species produces, and with the Energy maximum value Frequency point of each pulse signal for foundation time, often organize the requirement that whale ping meets Costas coding; (2) the whale ping group that produces of different types of whale group, and with the Energy maximum value Frequency point of each pulse signal for foundation time, often organize the requirement that whale ping meets Costas coding.

Compared with the prior art, technical characterstic of the present utility model and effect:

The utility model provides a kind of active sonar Costas-Like Frequency Hopping Signal production method utilizing sperm whale group sound, it can not only overcome the shortcoming that conventional sonar signals is easy to be identified and locate, and can also make full use of the superior function meeting the special Frequency Hopping Signal of Costas coding.

The utility model tool has the following advantages: (1) utilizes sperm whale group ping to pretend active sonar sound source, improves the disguise of sound source; (2) the sperm whale ping composition choosing different high-energy Frequency point meets the Frequency Hopping Signal of Costas coding characteristic, and make to transmit the superior function had 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 of providing in the utility model.

Fig. 2 shows the enlarged drawing of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Fig. 3 shows the enlarged drawing of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Fig. 4 shows the enlarged drawing of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Fig. 5 shows the enlarged drawing of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Fig. 6 shows the enlarged drawing of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Fig. 7 illustrates the fast Fourier transform result of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Fig. 8 illustrates the fast Fourier transform result of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Fig. 9 illustrates the fast Fourier transform result of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Figure 10 illustrates the fast Fourier transform result of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Figure 11 illustrates the fast Fourier transform result of the some sperm whale pings in a large amount of sperm whale group pings described in the utility model.

Figure 12 illustrates the auto-correlation result of pulse signal shown in the Fig. 2 described in the utility model.

Figure 13 illustrates the auto-correlation result of pulse signal shown in the Fig. 5 described in the utility model.

Figure 14 illustrates the cross correlation results of pulse signal shown in Fig. 2 and Fig. 5 described in the utility model.

Figure 15 illustrates the active sonar Costas-Like Frequency Hopping Signal generation device utilizing sperm whale group sound described in the utility model.

Figure 16 illustrates that first described in the utility model group is similar to and meets f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}in the ping of relation, the fast Fourier transform result of the 1st ping, it also shows the Energy maximum value Frequency point of this ping simultaneously.

Figure 17 illustrates that first described in the utility model group is similar to and meets f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}in the ping of relation, the fast Fourier transform result of the 2nd ping, it also shows the Energy maximum value Frequency point of this ping simultaneously.

Figure 18 illustrates that first described in the utility model group is similar to and meets f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}in the ping of relation, the fast Fourier transform result of the 3rd ping, it also shows the Energy maximum value Frequency point of this ping simultaneously.

Figure 19 illustrates that first described in the utility model group is similar to and meets f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}in the ping of relation, the fast Fourier transform result of the 4th ping, it also shows the Energy maximum value Frequency point of this ping simultaneously.

Figure 20 illustrates that first described in the utility model group is similar to and meets f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}in the ping of relation, the fast Fourier transform result of the 5th ping, it also shows the Energy maximum value Frequency point of this ping simultaneously.

Figure 21 illustrates that first described in the utility model group is similar to and meets f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}in the ping of relation, the fast Fourier transform result of the 6th ping, it also shows the Energy maximum value Frequency point of this ping simultaneously.

Figure 22 illustrates that first described in the utility model group is similar to and meets f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}in the ping of relation, the fast Fourier transform result of the 7th ping, it also shows the Energy maximum value Frequency point of this ping simultaneously.

Figure 23 illustrates the Costas encoding law described in the utility model.

Figure 24 illustrates the Costas-Like Frequency Hopping Signal group of two described in the utility model, they are alternately passed through active sonar sound system and are sent, wherein, 1 is first group of Costas-Like Frequency Hopping Signal group, and 2 is second group of Costas-Like Frequency Hopping Signal group.

Embodiment

For the problems of the prior art, the utility model utilizes whale acoustical signal as Active Acoustic source signal, and the signal making it be mistaken as into real whale to send, plays the effect of camouflage.

(1) in the utility model, adopt sperm whale group acoustical signal as source emission signal, signal enemy being takeed for receive is from sperm whale group but not active sonar sound source, play the effect of camouflage sound source, improve active sonar sound source and pretend hidden ability, reduce it by the probability intercepted and captured;

(2) in the utility model, by carrying out multianalysis to sperm whale group acoustical signal, obtain following features and rule: 1. same sperm whale can send the different pulse signal of multi-signal envelope, and after spectrum analysis is carried out to these pulse signals, find that the Energy maximum value Frequency point of variety classes pulse signal is mainly distributed between 100Hz-12KHz; Cross correlation between variety classes pulse signal is little; 2. the high-energy Frequency point of some style pulse acoustical signals only has one, and the high-energy Frequency point of other style pulse acoustical signals has two, and the high-energy Frequency point of some other style pulse acoustical signal has multiple; The utility model utilizes above-mentioned 3 features and the rule of sperm whale group acoustical signal, sperm whale group sound pulse is transmitted and to arrange by certain method, the sperm whale group ping of launching is made to have the advantages that to be similar to Costas Frequency Hopping Signal, to process to the received signal subsequently through matched filtering technique, it is made to show superior function close to Costas frequency hopping rectangular pulse signal;

(3) in the utility model, on the one hand, utilize sperm whale group ping to pretend active sonar sound source, improve the disguise of sound source; On the other hand, the sperm whale ping composition choosing different high-energy Frequency point meets the Frequency Hopping Signal of Costas coding characteristic, and make to transmit the superior function had close to Costas frequency hopping rectangular pulse signal.

For overcoming the deficiencies in the prior art, the utility model provides a kind of active sonar Frequency Hopping Signal production method utilizing sperm whale group sound, it can not only overcome the shortcoming that conventional sonar signals is easy to be identified and locate, and can also make full use of the superior function meeting Costas coding characteristic Frequency Hopping Signal.

The technical scheme that the utility model is taked is, utilizes the active sonar Frequency Hopping Signal production method of sperm whale group sound, comprising:

The first step: the result of study of sperm whale mass-sending sound feature and rule illustrates:

Fig. 1 shows an example of the sperm whale group acoustical signal of a period of time; By carrying out multianalysis to a large amount of sperm whale group acoustical signal for a long time, obtain following features and rule: 1. same sperm whale can send the different pulse signal of multi-signal envelope (pulse signal such as shown in Fig. 2-6), and after spectrum analysis is carried out to these pulse signals, find that the Energy maximum value Frequency point of variety classes pulse signal is mainly distributed in (the pulse signal Energy maximum value Frequency point such as shown in Fig. 7-11) between 100Hz-12KHz; Autocorrelation between identical pulse signal is large, and the auto-correlation result of such as Fig. 2 and Fig. 5 respectively as shown in Figures 12 and 13; Cross correlation between variety classes pulse signal is little, and such as the cross correlation results of pulse signal shown in Fig. 2 and Fig. 5 as shown in figure 14; 2. the high-energy Frequency point of some style pulse acoustical signals only has one (such as Fig. 7 and Fig. 8 only has a high-energy Frequency point), the high-energy Frequency point of other style pulse acoustical signals has two (such as Fig. 9 and Figure 10 has two high-energy Frequency points), and 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 dissimilar pulse sound signal described in the utility model refers to the pulse signal with different envelope, different-energy maximal value Frequency point;

Further, after the Energy maximum value Frequency point of pulse signal refers to and carries out fast Fourier transform (FastFourier Transformation, FFT) to a pulse signal, the Frequency point f that the Amplitude maxima place obtained is corresponding _b(b=1,2,3, L, and b≤10000), the Frequency point that such as, Amplitude maxima place in Fig. 7-8 is corresponding;

Second step: the production method of active sonar Costas-Like Frequency Hopping Signal:

Due to the Energy maximum value Frequency point f of variety classes pulse signal _b(b=1,2,3, L, and b≤10000) be mainly distributed between 100Hz-12KHz, by analyzing a large amount of pulse signal and observing discovery: in numerous pulse signals, to have between the Energy maximum value Frequency point of some pulse signals and approximately meet following relation: f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}; Wherein f _i,k≠ f _j,k, the large I of i ≠ j, k sets according to actual needs, and definition f _{i, 1}, f _{i, 2}, f _{i, 3}, f _{i, 4}, L, f _i,kit is one group;

Further, multiple to meet between above-mentioned Energy maximum value Frequency point is selected approximately to meet f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}the pulse signal group of relation; With f _i,ksize be foundation, the pulse signal in every group is arranged by Costas encoding law, forms multiple sequences of pulsed signals group being similar to Costas frequency hopping rule; Attention: putting in order between sequences of pulsed signals group can need to carry out Choice and design according to practical application;

Further, the sequences of pulsed signals group being similar to Costas frequency hopping rule is called Costas-Like Frequency Hopping Signal;

Further, after organizing Costas-Like Frequency Hopping Signal more needs arrange by application, sent by active sonar sound system.

3rd step: the active sonar Costas-Like Frequency Hopping Signal generation device utilizing sperm whale group sound:

Utilize the active sonar Costas-Like Frequency Hopping Signal generation device of sperm whale group sound as shown in figure 15;

Further, command interface 1 can transfer control order to whale sound Costas code generator 2, control action is risen to the duty of whale sound Costas code generator 2;

Further, whale sound Costas code generator 2 is according to the instruction coming from command interface 1 received, the whale ping group meeting application requirement is selected from whale sound pulse Sample Storehouse 4, then, after more selected whale ping group being completed coding by Costas coded system, whale sound is sent to amplify follower 3;

Further, whale sound pulse Sample Storehouse 4 comprises: the whale ping group that the whale group of (1) one species produces, and with the Energy maximum value Frequency point of each pulse signal for foundation time, often organize the requirement that whale ping meets Costas coding; (2) the whale ping group that produces of different types of whale group, and with the Energy maximum value Frequency point of each pulse signal for foundation time, often organize the requirement that whale ping meets Costas coding;

Further, whale sound amplifies follower and is used for the signal coming from whale sound Costas code generator 2 to carry out power amplification, and uses voicing sensor acoustical signal to be sent.

The utility model has following technique effect:

The utility model is further described below in conjunction with the drawings and specific embodiments.

For overcoming the deficiencies in the prior art, the utility model provides a kind of active sonar Costas-Like Frequency Hopping Signal production method utilizing sperm whale group sound, it can not only overcome the shortcoming that conventional sonar signals is easy to be identified and locate, and can also make full use of the superior function meeting the special Frequency Hopping Signal of Costas coding.

The utility model is achieved in that

The first step: the result of study of sperm whale mass-sending sound feature and rule:

Due to the Energy maximum value Frequency point f of variety classes pulse signal _b(b=1,2,3, L, and b≤10000) is mainly distributed between 100Hz-12KHz, makes discovery from observation: in numerous pulse signals, to have between the Energy maximum value Frequency point of some pulse signals approximately to meet following relation: f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}; Wherein f _i,k≠ f _j,k, the large I of i ≠ j, k sets according to actual needs, and definition f _{i, 1}, f _{i, 2}, f _{i, 3}, f _{i, 4}, L, f _i,kit is one group; .

Further, multiple to meet between above-mentioned Energy maximum value Frequency point is selected approximately to meet f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}the pulse signal group of relation; With f _i,ksize be foundation, the pulse signal in every group is arranged by Costas encoding law, forms multiple sequences of pulsed signals group being similar to Costas frequency hopping rule; Attention: putting in order between sequences of pulsed signals group can need according to practical application and carry out Choice and design;

Below in conjunction with drawings and Examples, the utility model is described further:

In the utility model, by a concrete example, come to do more specifically and detailed description the utility model;

Further, the utility model is based on the feature of acquired sperm whale group acoustical signal and rule: in numerous pulse signals, has approximately between the Energy maximum value Frequency point of some pulse signals to meet following relation: f _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}; Wherein f _i,k≠ f _j,k, the large I of i ≠ j, k sets according to actual needs.

Further, by providing a concrete example, the utility model is described in further detail and explain below:

First the utility model carries out observation and analysis to one section of sperm whale group ping of 3 minutes, then by choosing, obtains two group pulse signals, is all similar to and meets f between their Energy maximum value Frequency point _{i, 2}≈ 2f _{i, 1}, f _{i, 3}≈ 3f _{i, 1}, f _{i, 4}≈ 4f _{i, 1}, f _{i, 5}≈ 5f _{i, 1}, f _{i, 6}≈ 6f _{i, 1}, f _{i, 7}≈ 7f _{i, 1}..., f _i,k≈ kf _{i, 1}relation; The Energy maximum value Frequency point of this two group pulses signal is respectively: 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, it is that the fast Fourier transform FFT of the first group pulse signal schemes, also contains Energy maximum value frequency point diagram simultaneously, 499.2/249.9 ≈ 2 can be obtained from figure, 749.3/249.9 ≈ 3,996.6/249.9 ≈ 4,1252/249.9 ≈ 5,1499/249.9 ≈ 6,1999/249.9 ≈ 7; Attention: the sperm whale group ping of above-mentioned 3 minutes is an example, in actual applications, is not limited to the length of selected sperm whale group ping time; Two above-mentioned obtained group pulse signals are also an example, and in actual applications, the Energy maximum value Frequency point of the pulse signal selected by only needing meets the requirement of Costas coding.

Further, with f _i,ksize be foundation, two group pulse signals described above are rearranged by Costas encoding law, form the sequences of pulsed signals group that two groups are similar to Costas frequency hopping rule, and such sequences of pulsed signals group is called Costas-Like Frequency Hopping Signal group;

Further, such as, the pulse signal corresponding to front 6 Energy maximum value Frequency points in the pulse signal corresponding to front 6 Energy maximum value Frequency points in first group and second group is chosen; Then, the signal in first group and second group is arranged by the Costas encoding law shown in Figure 23, form two Costas-Like Frequency Hopping Signal groups respectively;

Further, these two Costas-Like Frequency Hopping Signal groups are alternately passed through active sonar sound system send, 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;

Attention: the sending order between sequences of pulsed signals group can need according to practical application and carry out Choice and design, and need not meet the above-mentioned mode alternately sent, and above-mentioned ping-pong is a concrete example;

Claims

1. utilize an active sonar Frequency Hopping Signal generation device for sperm whale group sound, it is characterized in that, comprising: command interface, whale sound Costas code generator, whale sound pulse Sample Storehouse storer, whale sound amplify follower, voicing sensor; The control command received is sent to whale sound Costas code generator by command interface; Whale sound Costas code generator is according to the instruction received, the whale ping group meeting application requirement is selected from whale sound pulse Sample Storehouse storer, then, after more selected whale ping group being completed coding by Costas coded system, after sending to whale sound to amplify follower amplification, by voicing sensor, acoustical signal is sent.

2. utilize the active sonar Frequency Hopping Signal generation device of sperm whale group sound as claimed in claim 1, it is characterized in that, whale sound pulse Sample Storehouse storer stores: the whale ping group that the whale group of (1) one species produces, and with the Energy maximum value Frequency point of each pulse signal for foundation time, often organize the requirement that whale ping meets Costas coding; (2) the whale ping group that produces of different types of whale group, and with the Energy maximum value Frequency point of each pulse signal for foundation time, often organize the requirement that whale ping meets Costas coding.