CN117524267A - Remote pulse repetition frequency sound playing method based on networking - Google Patents
Remote pulse repetition frequency sound playing method based on networking Download PDFInfo
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- CN117524267A CN117524267A CN202311379994.8A CN202311379994A CN117524267A CN 117524267 A CN117524267 A CN 117524267A CN 202311379994 A CN202311379994 A CN 202311379994A CN 117524267 A CN117524267 A CN 117524267A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000006855 networking Effects 0.000 title claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 62
- 238000012545 processing Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000000007 visual effect Effects 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims abstract 3
- 238000010586 diagram Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 238000013139 quantization Methods 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
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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
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/544—Buffers; Shared memory; Pipes
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
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- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention provides a remote pulse repetition frequency sound playing method based on networking, which comprises the following steps: digital sampling is carried out on the radar radio frequency signals to form intermediate frequency sampling data; radar pulse detection is carried out on the intermediate frequency sampling data to form a bandwidth-preserving signal; widening and extracting the widened signal; creating two independent threads of a data receiving thread and a data processing thread; forming a continuous pulse sampling data stream and storing the continuous pulse sampling data stream into a shared memory; the data processing thread carries out filtering processing on pulse sampling data in the shared memory according to a certain period, and carries out data conversion to generate a pulse audio data stream; playing the pulse audio data stream; intercepting a section of audio data stream for visual display; and reading the data in the shared memory at regular time. The invention enables the radar pulse repetition frequency sound to play without noise, has the effect equivalent to that of an independent audio processing board card, and can assist an operator to quickly discover and identify key points and threat radar targets.
Description
Technical Field
The invention relates to the technical field of radar sound alarm management, in particular to a remote pulse repetition frequency sound playing method based on networking.
Background
Radar pulse repetition frequency sound is an important means for an operator to find and identify radar types, and an independent audio processing board card is generally adopted to receive analog bandwidth-keeping signals, the analog bandwidth-keeping signals are converted into audio signals through low-speed sampling, and the audio signals are played through a sound card of a computer. Along with rapid development of electronic anti-reconnaissance equipment and communication technology, front-end equipment and display control equipment are designed separately so as to adapt to severe geographic environments such as mountain terrains, coastal islands and reefs and the like, and an unattended and remote control mode is realized. At this time, the application of the independent audio processing board is limited, and the following two reasons are mainly:
(1) The electronic countermeasure equipment adopts a separated design to move forward the front-end equipment, and transmits digital signals through wireless or wired communication, so that analog signals required by the audio processing board card cannot be transmitted;
(2) The trend of digitalization, miniaturization, low power consumption and the like of electronic countermeasure equipment is that the adoption of an independent audio processing board card cannot meet the design requirement.
Disclosure of Invention
The invention aims to provide a networked remote pulse repetition frequency sound playing method, which aims to solve the problem that the radar pulse repetition frequency sound alarming method based on the audio processing board card has limitation.
The invention provides a remote play pulse repetition frequency sound method based on networking, which uses the existing FPGA resource of a digital receiver to digitally sample radar radio frequency signals and plays the signals through a computer sound card, and comprises the following steps:
the first step: digitally sampling a radar radio frequency signal with a sampling rate of Fs to form intermediate frequency sampling data;
and a second step of: performing radar pulse detection on the intermediate frequency sampling data by using a digital signal processing method, and forming a 1bit wide-guard signal under the sampling rate Fs on the radar pulse detection result;
and a third step of: considering that the pulse width range of a typical radar signal is 0.1 mu s-2000 mu s, in order to ensure that the audio sampling rate Fa (typical value is 44.1 kHz), the wide-band signal can be sampled without distortion by carrying out narrow pulse width sampling on the wide-band signal, and the wide-band signal is widened;
fourth step: extracting the widened signal according to an audio sampling rate, and reducing the sampling rate from Fs to Fa to form original audio data with the sampling rate Fa and the quantization bit number of 1 bit;
fifth step: in order to ensure smooth processing of pulse sampling data and avoid data blocking loss, two independent threads of a data receiving thread and a data processing thread are created, and data interaction is performed in a shared memory mode;
sixth step: the method comprises the steps that factors such as limited communication bandwidth, unstable delay and the like are considered, a data receiving thread splices, sorts and checks received pulse sampling data streams according to message time to form continuous pulse sampling data streams, and the continuous pulse sampling data streams are stored in a shared memory;
seventh step: in order to remove high-frequency noise caused by digital sampling, a data processing thread processes pulse sampling data in a shared memory through a low-pass filter according to a certain period;
eighth step: performing data conversion on the pulse sampling data processed by the low-pass filter according to the sampling depth, and multiplying the sampling depth by a play volume value to generate a pulse audio data stream;
ninth step: setting parameters such as sampling rate, sampling depth, channel number and the like, and playing the pulse audio data stream by utilizing an audio playing function;
tenth step: the UI thread is created to intercept a section of audio data flow and convert the audio data flow into a time-amplitude diagram for visual display, so that the change rule of the pulse interval can be conveniently observed;
eleventh step: creating a timer, regularly reading data in the shared memory, storing the original audio data stream according to the PCM format, and supporting the playback of the audio data after the fact.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
according to the invention, an additional processing board is not needed to be added, the radar analog signal is digitally sampled, then sampled data is converted into an audio data stream, and the audio data stream is played by utilizing the computer sound card, so that the radar pulse repetition frequency sound can be played without noise, the effect is equivalent to that of an independent audio processing board card, and an operator can be assisted to quickly find and identify key points and threat radar targets.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for remotely playing pulse repetition frequency based on networking in the present embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
A detailed implementation example of a certain ELINT device is described below, wherein relevant technical parameters in the device are a signal processing sampling rate 500Mbps, AD is 12 bits, a corresponding scout radar radiation source object is a pulse repetition period of 1ms, a pulse width of 0.5 mu s, a signal power of-50 dBm and an audio signal sampling rate of 44.1kHz. As shown in fig. 1, the present embodiment provides a method for remotely playing pulse repetition frequency based on networking, which includes the following steps:
the first step: digital sampling is carried out on the radar radio frequency signal, the sampling rate is 500Mbps, and intermediate frequency sampling data are formed;
and a second step of: performing radar pulse detection on the intermediate frequency sampling data by using a digital signal processing method, and forming a 1bit wide-protection signal at a sampling rate of 500Mbps on the radar pulse detection result;
and a third step of: considering that the signal pulse width range is 0.5 mu s, in order to ensure that the audio sampling rate is 44.1kHz, the wide-guard signal can be sampled without distortion, and the wide-guard signal can be stretched to 23 mu s;
fourth step: extracting the widened and widened signal according to an audio sampling rate, and reducing the sampling rate from 500Mbps to 44.1kHz to form original audio data with the sampling rate of 44.1kHz and the quantization bit number of 1 bit;
fifth step: creating two independent threads of a data receiving thread and a data processing thread, and initializing a shared memory mode to be 1MByte (approximately storing 5 seconds of data);
sixth step: the data receiving thread splices the received pulse sampling data streams according to the 5-second beat, sorts the data streams according to the sending time of the data streams, checks the data streams according to the check codes of the data streams, forms continuous pulse sampling data streams and stores the continuous pulse sampling data streams into the shared memory;
seventh step: the data processing thread carries out low-pass filter processing on pulse sampling data in the shared memory according to a period of 5 seconds;
eighth step: the pulse sampling data processed by the low-pass filter is subjected to data conversion according to 8 bits, and is multiplied by a play volume value to generate a pulse audio data stream;
ninth step: setting parameters such as 44.1kHz sampling rate, 8bit sampling depth, single channel number and the like, and playing the audio data stream by utilizing an audio playing function;
tenth step: creating a UI thread, intercepting the first 2000 audio data streams, converting according to time and amplitude formats, and sending to a time-amplitude line segment diagram for display;
eleventh step: the system creates a timer, reads the shared memory data at 1 second, stores the original audio data stream according to the PCM format, and provides an audio data file opening and reading interface.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The method for remotely playing the pulse repetition frequency sound based on the networking is characterized by comprising the following steps of:
the first step: digitally sampling a radar radio frequency signal with a sampling rate of Fs to form intermediate frequency sampling data;
and a second step of: performing radar pulse detection on the intermediate frequency sampling data by using a digital signal processing method, and forming a 1bit wide-guard signal under the sampling rate Fs on the radar pulse detection result;
and a third step of: widening the widened signal;
fourth step: extracting the widened signal according to an audio sampling rate, and reducing the sampling rate from Fs to Fa to form original audio data with the sampling rate Fa and the quantization bit number of 1 bit;
fifth step: creating two independent threads of a data receiving thread and a data processing thread, and performing data interaction in a shared memory mode;
sixth step: the data receiving thread processes the received pulse sampling data stream to form a continuous pulse sampling data stream and stores the continuous pulse sampling data stream into the shared memory;
seventh step: the data processing thread filters pulse sampling data in the shared memory according to a certain period;
eighth step: performing data conversion on the pulse sampling data subjected to filtering processing to generate a pulse audio data stream;
ninth step: playing the pulse audio data stream;
tenth step: creating a UI thread to intercept a section of audio data stream and convert the audio data stream into a time-amplitude diagram for visual display;
eleventh step: creating a timer, regularly reading data in the shared memory, storing the original audio data stream, and supporting the playback of the audio data after the fact.
2. The method of claim 1, wherein in the sixth step, the data receiving thread splices, sorts and checks the received pulse sampled data streams according to the message time to form a continuous pulse sampled data stream.
3. The method for remotely playing back pulse repetition frequency audio based on network as recited in claim 1, wherein in the seventh step, a low pass filter is used for filtering.
4. The networked remote playback pulse repetition frequency audio method as set forth in claim 1, wherein in the eighth step, the filtered pulse sample data is subjected to data conversion according to the sampling depth, and the playback volume value is multiplied to generate the pulse audio data stream.
5. The method of claim 1, wherein in the ninth step, the sampling rate, the sampling depth and the channel number are set, and the pulse audio data stream is played by using an audio playing function.
6. The method of claim 1, wherein in the eleventh step, the original audio data stream is stored in PCM format.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311379994.8A CN117524267A (en) | 2023-10-23 | 2023-10-23 | Remote pulse repetition frequency sound playing method based on networking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311379994.8A CN117524267A (en) | 2023-10-23 | 2023-10-23 | Remote pulse repetition frequency sound playing method based on networking |
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| CN117524267A true CN117524267A (en) | 2024-02-06 |
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| CN202311379994.8A Pending CN117524267A (en) | 2023-10-23 | 2023-10-23 | Remote pulse repetition frequency sound playing method based on networking |
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- 2023-10-23 CN CN202311379994.8A patent/CN117524267A/en active Pending
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