CN109507645B - Method and device for extracting pulse description words - Google Patents
Method and device for extracting pulse description words Download PDFInfo
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- CN109507645B CN109507645B CN201811083978.3A CN201811083978A CN109507645B CN 109507645 B CN109507645 B CN 109507645B CN 201811083978 A CN201811083978 A CN 201811083978A CN 109507645 B CN109507645 B CN 109507645B
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- 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
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- G01S7/292—Extracting wanted echo-signals
- G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
- G01S7/2927—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods by deriving and controlling a threshold value
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Abstract
The embodiment of the invention provides a method and a device for extracting a pulse description word, wherein the method comprises the following steps: acquiring baseband signal information, and carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information; carrying out noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information; determining first threshold information and second threshold information according to the noise bottom estimation information and the baseband signal envelope information; determining pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information; and extracting the pulse description word according to the pulse signal information, the first threshold information and the second threshold information. The method obtains the noise bottom of the baseband signal by carrying out envelope detection processing and noise bottom estimation processing on the baseband information, thereby extracting the pulse description words in real time according to the noise bottom of the baseband signal and the optimized baseband signal.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method and a device for extracting a pulse description word.
Background
Electronic investigation plays a crucial role in modern electronic wars, and in modern electronic wars, enemy information is often required to be rapidly and effectively acquired through electronic investigation, but the main mode of electronic investigation at present is to extract pulse description words.
In the prior art, pulse description words are generally extracted in a frequency domain, but the real-time performance is difficult to be ensured in the frequency domain, and the side accuracy of other methods for extracting pulse description words is not enough to meet the requirement, so how to accurately extract pulse description words in real time becomes a problem to be solved in the present industry.
Disclosure of Invention
Embodiments of the present invention provide a method and an apparatus for extracting a pulse description word, which are used to solve the above problems or at least partially solve the problems in the background art.
In a first aspect, an embodiment of the present invention provides a method for extracting a pulse description word, including:
acquiring baseband signal information, and carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information;
carrying out noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information;
determining first threshold information and second threshold information according to the noise bottom estimation information and the baseband signal envelope information;
determining pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information;
and extracting a pulse description word according to the pulse signal information, the first threshold information and the second threshold information.
In a second aspect, an embodiment of the present invention provides an apparatus for extracting a pulse description word, including:
the detection module is used for acquiring baseband signal information and carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information;
the estimation module is used for carrying out noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information;
the analysis module is used for determining first threshold information and second threshold information according to the noise floor estimation information and the baseband signal envelope information;
the confirming module is used for confirming pulse signal information according to the first threshold information and the second threshold information;
and the extraction module is used for extracting the pulse description word according to the pulse signal information, the first threshold information and the second threshold information.
In a third aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the method for extracting a pulse description word according to the first aspect when executing the program.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method for extracting a pulse description word according to the first aspect.
The embodiment of the invention provides a method and a device for extracting a pulse description word, which are used for carrying out envelope detection processing based on a sliding window on baseband signal information in a time domain to obtain the baseband signal information with better signals.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for extracting a pulse descriptor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for extracting a pulse descriptor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flowchart of a method for extracting a pulse descriptor according to an embodiment of the present invention; as shown in fig. 1, includes:
s1, obtaining baseband signal information, and carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information;
s2, performing noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information;
s3, determining first threshold information and second threshold information according to the noise floor estimation information and the baseband signal envelope information;
s4, determining pulse signal information according to the first threshold information and the second threshold information;
and S5, extracting a pulse description word according to the pulse signal information, the first threshold information and the second threshold information.
S1 shows that the baseband signal information described herein may be radar pulse signal information or communication pulse signal information; the baseband signal information is filtered before it is acquired.
The sliding window described herein is to control the traffic by limiting the maximum signal information that can be received in each window, and the preset sliding window slides on the preset time sequence, and when the preset sliding window slides for one time sequence, a new signal information enters the front end of the preset sliding window, and at this time, an old signal information is removed from the rear end of the preset sliding window.
The envelope detection processing based on the sliding window specifically means that in the processing process, every time a time sequence slides, a new signal information enters the front end of the preset sliding window, and at the moment, an old signal information is removed from the rear end of the preset sliding window, so that a preset number of signal information can be always kept in the preset sliding window.
For example, the fixed width of the preset sliding window is L, and the preset sliding window may intercept L baseband signal information data; respectively calculating square values of L pieces of baseband signal information data, and adding the square values to obtain baseband signal information accumulation numerical values of a first sliding window; after the preset sliding window is slid by a time sequence, a new signal information enters the preset sliding window, the square value of the newly entered signal information data is calculated, and then the square value of the first signal information data in the first sliding window is subtracted, so that the accumulated value of the signal information of the second sliding window is obtained; and repeating the steps until the envelope detection processing of the whole baseband signal information based on the sliding window is completed. Therefore, the envelope detection processing based on the sliding window is carried out, so that only two times of calculation processing are needed when an accumulated value of new baseband signal information is calculated, the calculation amount in the processing process is small, the processing time is short, and the real-time extraction of the pulse description words is realized in the subsequent process.
The signal information which is continuously updated along with the preset sliding window has correlation with each other, and the noise which is continuously updated along with the preset sliding window has no correlation with each other, so that the noise and the signal information can be well distinguished in a time domain by the processing, and when the preset sliding window slides to a noise area, the accumulated value of the signal information is very small; when the preset sliding window slides to the signal area, the signal information is rapidly accumulated, so that the accumulation value of the signal information is rapidly increased; when the preset sliding window completely slides into the signal area, the accumulated value of the signal information basically does not change; when the preset sliding window slides out of the signal area, the accumulated value of the signal information gradually becomes smaller until the preset sliding window completely slides out of the signal area and enters the noise area, and the accumulated value of the signal information is small; in summary, it can be known that a variation curve of an accumulated value of signal information in a sliding process of a preset sliding window is a trapezoid, and at this time, the variation curve of the accumulated value of signal information is baseband signal envelope information corresponding to the baseband signal information.
S2 specifically, the step of performing noise floor estimation processing here is to take an arithmetic mean of all signal amplitudes in the baseband signal information as a first mean value, then obtain a false alarm threshold value according to an expected false alarm probability, and multiply the first mean value and the false alarm threshold value to obtain a first detection threshold value; marking the baseband signal information which does not exceed the first detection threshold value as second baseband detection information; the baseband signal information exceeding the first detection threshold value is marked as first baseband detection information.
Taking the arithmetic mean of all signal amplitudes in the second baseband detection information as a second mean value, multiplying the second mean value by the false alarm threshold value to obtain a second detection threshold value,
and merging the second baseband detection information exceeding the second detection threshold value into the first baseband detection information to obtain third baseband detection information, and if the third baseband detection information is the same as the first baseband detection information, taking the second detection threshold value as noise bottom estimation information.
S3 specifically, the noise floor estimation information is used as first threshold information, then the maximum value of the baseband signal envelope information is used as first envelope information, the first threshold information is subtracted from the first envelope information to obtain difference data, and the difference data is multiplied by the threshold coefficient information to obtain second threshold information.
S4 specifically, sequentially comparing signal amplitudes in the baseband signal envelope information with first threshold information, and when a plurality of adjacent signal amplitudes all exceed the first threshold information, marking the adjacent signal whose amplitude exceeds the first threshold information as a cluster; and comparing the maximum value of the signal amplitude in the cluster with second threshold information, and determining the cluster mark as pulse signal information if the maximum value of the signal amplitude in the cluster is greater than the second threshold information.
S5, wherein the pulse descriptor specifically refers to parameters describing physical characteristics of a signal within a pulse signal, including pulse amplitude, pulse width, and pulse arrival time; therefore, the operation of extracting the pulse description word is actually completed by determining the pulse amplitude, the pulse width and the pulse arrival time according to the pulse signal information, the first threshold information and the second threshold information.
After the extraction of the pulse description words is completed, the embodiment of the invention further comprises the step of sequentially integrating and outputting the pulse arrival time, the pulse amplitude and the pulse width according to the pulse sequence number.
The embodiment of the invention obtains the baseband signal information with better signals by carrying out envelope detection processing based on the sliding window on the baseband signal information in the time domain, the detection process based on the sliding window has small calculation amount and short processing time, so that the real-time extraction of the pulse description words can be realized in the subsequent process, and after carrying out noise floor estimation processing on the baseband signal information, the threshold information automatically adjusted by the baseband signal information can be combined, thereby realizing the real-time extraction of the pulse description words.
On the basis of the foregoing embodiment, the step of performing noise floor estimation processing on the baseband signal information to obtain noise floor estimation information corresponding to the baseband signal information specifically includes:
determining a first detection threshold value according to all signal amplitudes and false alarm probabilities in the baseband signal information;
marking the baseband signal information of which the signal amplitude exceeds a first detection threshold value as first baseband detection information, and marking the baseband signal information which does not exceed the first detection threshold value as second baseband detection information;
determining a second detection threshold value according to all signal amplitudes and false alarm probabilities in the second baseband detection information;
merging the second baseband detection information exceeding a second detection threshold value into the first baseband detection information to obtain third baseband detection information;
if the third baseband detection information is the same as the first baseband detection information; and taking the second detection threshold value as noise floor estimation information corresponding to the baseband signal information.
In particular, the false alarm probability P thereinfaWhen the set noise bottom estimation value is lower than the noise, the noise is mistakenly taken as effective information, namely a false alarm is generated, and the probability that the noise is higher than the threshold is taken as the false alarm probability PfaAnd in this application the false alarm probability PfaGenerally 0.001. ltoreq.PfaLess than or equal to 0.05; and a false alarm threshold value theta can be obtained according to the false alarm probability:
wherein, PfaIs the false alarm probability.
And the arithmetic mean of all signal amplitudes in the baseband signal information is a first mean value
Thus, a first detection threshold is obtained as:
wherein theta is a false alarm threshold value,
is the first average value.
After the first detection threshold value is obtained, marking the baseband signal information of which the signal amplitude exceeds the first detection threshold value as first baseband detection information phi(1)Marking the baseband signal information which does not exceed the first detection threshold value as second baseband detection information omega-phi(1)。
Taking second baseband detection information omega-phi(1)The arithmetic mean of all the signal amplitudes in the second detection threshold is then the second mean value, thus obtaining a second detection threshold value:
wherein theta is a false alarm threshold value,
is the second average value.
And will exceed the second detection threshold value T(2)Second baseband detection information omega-phi(1)Merging to first baseband detection information phi(1)To obtain third baseband detection information phi(2)Repeating the above steps until phi(m)＝Φ(m+1)If so, the finally obtained detection threshold information is noise bottom estimation information; e.g. third base band detection information phi(2)With first baseband detection information phi(1)If the noise floor estimation information is the same, the finally obtained noise floor estimation information is T(2)。
The embodiment of the invention determines the detection threshold value through all signal amplitudes and false alarm probabilities in the baseband signal information, and performs continuous mean value elimination operation on the baseband signal information according to the detection threshold value to finally obtain the noise bottom estimation information corresponding to the baseband signal information, thereby facilitating the real-time extraction of the subsequent pulse description words.
On the basis of the foregoing embodiment, the step of determining the first threshold information and the second threshold information according to the noise floor estimation information and the baseband signal envelope information specifically includes:
taking the noise floor estimation information as first threshold information, and acquiring a maximum value in the baseband signal envelope information as first envelope information;
subtracting the first envelope information from the first threshold information to obtain first difference information;
and multiplying the first difference information by the threshold parameter information to obtain second threshold information.
Specifically, the threshold parameter information μ described herein can be valued according to specific situations, where μ is greater than or equal to 0 and less than or equal to 1; the first threshold information is determined according to the noise floor estimation information, so that the first threshold information changes with the change of the noise floor estimation information, and the second threshold information is calculated according to the first threshold information and the baseband signal envelope information, so that the second threshold information can also change with the change of the noise floor estimation information and the baseband signal envelope information, and both the noise floor estimation information and the baseband signal envelope information are obtained from the baseband signal information, so that the threshold information also changes with the change of the amplitude of the baseband signal information signal as long as the amplitude of the signal in the baseband signal information changes, and therefore the threshold information can be automatically adjusted with the change of the amplitude of the baseband signal information signal.
The embodiment of the invention determines the threshold information which can be automatically adjusted along with the amplitude change of the baseband signal information signal through the noise bottom estimation information and the baseband signal envelope information, thereby being beneficial to the real-time extraction of the pulse description word in the follow-up process.
On the basis of the foregoing embodiment, the step of determining pulse signal information according to the baseband signal envelope information, the first threshold information, and the second threshold information specifically includes:
marking the baseband signal envelope information of which the signal amplitude is greater than first threshold information in the baseband signal envelope information as a first information cluster;
and if the maximum signal amplitude in the first information cluster is larger than the second threshold information, determining that the first information cluster is pulse signal information.
Specifically, all baseband signal envelope information signal amplitudes are sequentially compared with first threshold information, and when a plurality of adjacent baseband signal envelope information signal amplitudes exceed the first threshold information, the adjacent baseband signal envelope information signal amplitudes exceeding the first threshold information are marked as a first information cluster.
And comparing the maximum value of the amplitude of the first information cluster signal with second threshold information, if the maximum value of the amplitude of the first information cluster signal is greater than the second threshold information, determining that the first information cluster is pulse signal information, and if the maximum value of the amplitude of the first information cluster signal is not greater than the second threshold information, determining that the first information cluster is not pulse signal information.
According to the embodiment of the invention, the amplitude of the baseband signal envelope information signal is compared with the first threshold information to determine the first information cluster, and the maximum signal amplitude in the first information cluster is compared with the second threshold information to determine the pulse signal information, so that the extraction of the pulse description word is facilitated.
On the basis of the foregoing embodiment, the step of extracting the pulse description word according to the pulse signal information, the first threshold information, and the second threshold information specifically includes:
acquiring a first intersection point of the pulse signal information and second threshold information as the pulse arrival time of the pulse signal information;
acquiring a second intersection point of the pulse signal information and second threshold information as the end time of the pulse signal information;
acquiring a difference value between the arrival time of the pulse signal information and the end time of the pulse signal information as a pulse width of the pulse signal information;
acquiring a difference value between the maximum signal amplitude value in the baseband signal envelope information and first threshold information, and taking the difference value as the pulse amplitude of the pulse signal information;
and extracting a pulse description word according to the pulse arrival time, the pulse width and the pulse amplitude of the pulse signal information.
Specifically, after obtaining the pulse arrival time, the pulse width and the pulse amplitude of the pulse signal and extracting the pulse description word, the method further comprises integrating the information to finally complete the extraction of the pulse description word, and the pulse description word can be output after the extraction of the pulse description word is completed; and the threshold information can be automatically adjusted along with the amplitude change of the baseband signal information signal, so that the pulse description words can be accurately extracted in real time.
The embodiment of the invention respectively determines the pulse arrival time, the pulse width and the pulse amplitude of the pulse signal through the masquerading signal information and the threshold information, thereby realizing the extraction of the pulse description word.
Fig. 2 is a schematic structural diagram of an apparatus for extracting a pulse descriptor according to an embodiment of the present invention, as shown in fig. 2, including: a detection module 210, an estimation module 220, an analysis module 230, a validation module 240, and an extraction module 250.
The detection module 210 is configured to obtain baseband signal information, and perform envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information; the estimation module 220 is configured to perform noise-floor estimation processing on the baseband signal information to obtain noise-floor estimation information corresponding to the baseband signal information; wherein the analysis module 230 is configured to determine first threshold information and second threshold information according to the noise floor estimation information and the baseband signal envelope information; wherein, the confirming module 240 determines pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information; the extracting module 250 is configured to extract a pulse description word according to the pulse signal information, the first threshold information, and the second threshold information.
The device for extracting a pulse descriptor provided in the embodiments of the present invention is used to implement the above method embodiments of the present invention, and for the specific flow and detailed description, reference is made to the above method embodiments, which are not described herein again.
The embodiment of the invention obtains the baseband signal information with better signals by carrying out envelope detection processing based on the sliding window on the baseband signal information in the time domain, the detection process based on the sliding window has small calculation amount and short processing time, so that the real-time extraction of the pulse description words can be realized in the subsequent process, and after carrying out noise floor estimation processing on the baseband signal information, the threshold information automatically adjusted by the baseband signal information can be combined, thereby realizing the real-time extraction of the pulse description words.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 3, the electronic device may include:
a processor (processor)310, a communication Interface (communication Interface)320, a memory (memory)330 and a communication bus 340, wherein the processor 310, the communication Interface 320 and the memory 330 communicate with each other via the bus 340. The communication interface 320 may be used for information transfer between the automated test equipment and the automated test system. The processor 310 may call logic instructions in the memory 330 to perform the following method: obtaining baseband signal information; carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information; carrying out noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information; determining first threshold information and second threshold information according to the noise bottom estimation information and the baseband signal envelope information; determining pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information; and extracting the pulse description word according to the pulse signal information, the first threshold information and the second threshold information.
In addition, the logic instructions in the memory 330 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes: obtaining baseband signal information; carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information; carrying out noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information; determining first threshold information and second threshold information according to the noise bottom estimation information and the baseband signal envelope information; determining pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information; and extracting the pulse description word according to the pulse signal information, the first threshold information and the second threshold information.
An embodiment of the present invention provides a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions enable a computer to execute the method for testing a functional plug-in for a ship provided in the foregoing embodiment, for example, the method includes: obtaining baseband signal information; carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information; carrying out noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information; determining first threshold information and second threshold information according to the noise bottom estimation information and the baseband signal envelope information; determining pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information; and extracting the pulse description word according to the pulse signal information, the first threshold information and the second threshold information.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A method for extracting a pulse description word is characterized by comprising the following steps:
acquiring baseband signal information, and carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information;
carrying out noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information;
determining first threshold information and second threshold information according to the noise bottom estimation information and the baseband signal envelope information;
determining pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information;
extracting a pulse description word according to the pulse signal information, the first threshold information and the second threshold information;
the step of performing noise floor estimation processing on the baseband signal information to obtain noise floor estimation information corresponding to the baseband signal information specifically includes:
determining a first detection threshold value according to all signal amplitudes and false alarm probabilities in the baseband signal information;
marking the baseband signal information of which the signal amplitude exceeds a first detection threshold value as first baseband detection information, and marking the baseband signal information which does not exceed the first detection threshold value as second baseband detection information;
determining a second detection threshold value according to all signal amplitudes and false alarm probabilities in the second baseband detection information;
merging the second baseband detection information exceeding a second detection threshold value into the first baseband detection information to obtain third baseband detection information;
if the third baseband detection information is the same as the first baseband detection information; taking the second detection threshold value as noise floor estimation information corresponding to the baseband signal information;
wherein the step of determining first threshold information and second threshold information according to the noise floor estimation information and the baseband signal envelope information specifically includes:
taking the noise floor estimation information as first threshold information, and acquiring a maximum value in the baseband signal envelope information as first envelope information;
subtracting the first envelope information from the first threshold information to obtain first difference information;
and multiplying the first difference information by the threshold parameter information to obtain second threshold information.
2. The method according to claim 1, wherein the step of determining the pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information specifically comprises:
marking the baseband signal envelope information of which the signal amplitude is greater than first threshold information in the baseband signal envelope information as a first information cluster;
and if the maximum signal amplitude in the first information cluster is larger than the second threshold information, determining that the first information cluster is pulse signal information.
3. The method according to claim 1, wherein the step of extracting the pulse description word according to the pulse signal information, the first threshold information, and the second threshold information specifically includes:
acquiring a first intersection point of the pulse signal information and second threshold information as the pulse arrival time of the pulse signal information;
acquiring a second intersection point of the pulse signal information and second threshold information as the end time of the pulse signal information;
acquiring a difference value between the arrival time of the pulse signal information and the end time of the pulse signal information as a pulse width of the pulse signal information;
acquiring a difference value between the maximum signal amplitude value in the baseband signal envelope information and first threshold information, and taking the difference value as the pulse amplitude of the pulse signal information;
and extracting a pulse description word according to the pulse arrival time, the pulse width and the pulse amplitude of the pulse signal information.
4. An apparatus for extracting a pulse description word, comprising:
the detection module is used for acquiring baseband signal information and carrying out envelope detection processing based on a sliding window on the baseband signal information to obtain baseband signal envelope information corresponding to the baseband signal information;
the estimation module is used for carrying out noise bottom estimation processing on the baseband signal information to obtain noise bottom estimation information corresponding to the baseband signal information;
the analysis module is used for determining first threshold information and second threshold information according to the noise floor estimation information and the baseband signal envelope information;
the confirming module is used for confirming pulse signal information according to the baseband signal envelope information, the first threshold information and the second threshold information;
the extraction module is used for extracting a pulse description word according to the pulse signal information, the first threshold information and the second threshold information;
the estimation module is specifically configured to determine a first detection threshold value according to all signal amplitudes and false alarm probabilities in the baseband signal information;
marking the baseband signal information of which the signal amplitude exceeds a first detection threshold value as first baseband detection information, and marking the baseband signal information which does not exceed the first detection threshold value as second baseband detection information;
determining a second detection threshold value according to all signal amplitudes and false alarm probabilities in the second baseband detection information;
merging the second baseband detection information exceeding a second detection threshold value into the first baseband detection information to obtain third baseband detection information;
if the third baseband detection information is the same as the first baseband detection information; taking the second detection threshold value as noise floor estimation information corresponding to the baseband signal information;
wherein the analysis module is specifically configured to:
taking the noise floor estimation information as first threshold information, and acquiring a maximum value in the baseband signal envelope information as first envelope information;
subtracting the first envelope information from the first threshold information to obtain first difference information;
and multiplying the first difference information by the threshold parameter information to obtain second threshold information.
5. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for extracting a pulse description word according to any one of claims 1 to 3 when executing the program.
6. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for extracting a pulse description word according to any one of claims 1 to 3.
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| CN201811083978.3A CN109507645B (en) | 2018-09-17 | 2018-09-17 | Method and device for extracting pulse description words |
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