CN111551910B - UDP communication-based radar clutter background map compressed data transmission method - Google Patents
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Abstract
The invention discloses a transmission method of radar clutter background map compressed data based on UDP communication, which is characterized in that a clutter background map forms a real-time memory data stream of the clutter background map in a beam-by-beam manner according to a detection angle and a detection distance, and the real-time memory data stream forms a three-dimensional matrix; constructing a sparse matrix of a clutter background map after optimizing by using a feedforward neural network; compressing the sparse matrix of the clutter background image to form clutter background image sparse matrix compressed data, and sending the clutter background image sparse matrix compressed data to a radar display and control terminal system through a radar data transmission subsystem in a radar detection system in a UDP (user Datagram protocol) communication mode; classifying the monitored display control command and the clutter background map sparse matrix compressed data to form queues with different priorities; and sending control command data to the radar detection system in a priority mode, and displaying a corresponding clutter background image through a display and control subsystem. The invention ensures the reliability and real-time performance of data transmission and display and has good application prospect.
Description
Technical Field
The invention relates to the technical field of radar data transmission, in particular to a transmission method of radar clutter background map compressed data based on UDP communication.
Background
The radar detection clutter background image is used for panoramic real-time detection of a detection site environment so as to improve the accuracy of radar signal detection. The clutter background map data has the characteristics of high real-time performance, large data volume, high occupied bandwidth, high occupied system computing resources, no packet loss required by network transmission and the like, so that how to quickly and effectively transmit the clutter background map data in real time is very important.
At present, clutter background pictures on the market are mostly transmitted in a TCP (transmission control protocol) communication mode, a non-real-time network transmits clutter background picture data or stores the clutter background picture as a picture to reduce data volume, but the clutter background picture data is not optimized in the mode, so that the data volume is huge, the real-time performance of the clutter background picture is reduced, the TCP communication is adopted to increase the resource consumption of network frequent links, and the risk and the loss rate that display and control data cannot be normally transmitted when the clutter background picture is transmitted are increased.
Therefore, how to perform radar clutter background map and reliable real-time propagation is a problem to be solved at present.
Disclosure of Invention
The invention aims to overcome the problems of the conventional clutter background map which is communicated through a Transmission Control Protocol (TCP). The transmission method of radar clutter background map compressed data based on UDP communication optimizes the clutter background map data transmission and storage mode by adopting a feedforward neural network mode, further reduces the data transmission amount, improves the data transmission rate and stability, adopts UDP communication for data transmission, further improves the speed, adopts a method of controlling a command data priority queue, responds to the control command data preferentially, ensures the reliability of data display, and has good application prospect.
In order to achieve the purpose, the invention adopts the technical scheme that:
a transmission method of radar clutter background map compressed data based on UDP communication comprises the following steps,
step (A), after the clutter background image is detected by the radar detection system, the clutter background image is formed into a real-time memory data stream of the clutter background image in a beam-by-beam manner according to the detection angle and the detection distance, the real-time memory data stream is formed into a three-dimensional matrix,
step (B), the three-dimensional matrix in the step (A) is optimized by utilizing a feedforward neural network to construct a sparse matrix of a clutter background image;
compressing the sparse matrix of the clutter background image to form clutter background image sparse matrix compressed data, and sending the clutter background image sparse matrix compressed data to a radar display and control terminal system through a radar data transmission subsystem in a radar detection system in a UDP (user Datagram protocol) communication mode;
step (D), a display and control terminal data processing subsystem in the radar display and control terminal system monitors a display and control command and clutter background map sparse matrix compressed data in real time, and classifies the monitored display and control command and clutter background map sparse matrix compressed data to form queues with different priorities;
and (E) the display and control terminal data processing subsystem in the radar display and control terminal system sends control command data to the radar detection system according to the priority mode, and the display and control terminal display subsystem displays the corresponding clutter background image.
The transmission method of the radar clutter background map compressed data based on the UDP communication includes the steps of (a) forming a real-time memory data stream of the clutter background map from the clutter background map to a beam by beam according to a detection angle and a detection distance, and forming a three-dimensional matrix from the real-time memory data stream,
(A1) the clutter background image preprocessing subsystem in the radar detection system detects radar from a first wave beam of a starting detection angle, all clutter background image points in a distance range form a wave beam clutter background image data stream according to distance, angle and speed, and the real-time memory data stream of the clutter background image is formed in sequence by wave beams;
(A2) the method comprises the following steps of forming a three-dimensional matrix from real-time memory data streams of all wave beam clutter background maps, issuing the three-dimensional matrix into a shared memory in a data stream mode, wherein three dimensions of the three-dimensional matrix are distance, angle and speed respectively, and the value of the three-dimensional matrix represents amplitude, and converting the three-dimensional matrix into a specific method for issuing the three-dimensional matrix into the shared memory in a data stream mode, wherein a three-dimensional array is defined in the memory, and the array is defined as: and M [ distance ] [ angle ] [ speed ], correspondingly mapping the values of all the wave beam clutter background maps into a three-dimensional matrix, completing the formation of the three-dimensional matrix by the real-time memory data streams of all the wave beam clutter background maps, and issuing the three-dimensional matrix to a shared memory.
The transmission method of the radar clutter background map compressed data based on the UDP communication comprises the step (B) of constructing a sparse matrix of the clutter background map after optimizing by utilizing a feedforward neural network, and comprises the following steps,
(B1) processing a three-dimensional matrix of the clutter background map by using a feedforward neural network and an evaluation index to form an alternative matrix, wherein the alternative matrix is classified according to the weight of the clutter background map, and the weight is calculated according to the signal clutter ratio of the point of a single clutter background map in the three-dimensional matrix in the distance dimension and the amplitude;
(B2) evaluating and optimizing the alternative matrix by using the feedforward neural network evaluation index, recording an optimization parameter, and feeding back the optimization parameter to (B1);
(B3) and (5) screening signal points with high weights layer by layer according to the weights of the clutter background images, and repeating the steps (B1) - (B2) until the signal-to-clutter ratio of the points of the single clutter background image in the distance dimension and the amplitude reaches a parameter optimization threshold range, and determining the signal-to-clutter ratio as a final optimization parameter.
In the above transmission method of radar clutter background map compressed data based on UDP communication, in step (D), a display and control terminal data processing subsystem in the radar display and control terminal system monitors the display and control command and the clutter background map sparse matrix compressed data in real time, and classifies the monitored display and control command and the clutter background map sparse matrix compressed data into different priority queues, including the following steps,
(D1) a display and control terminal data processing subsystem in the radar display and control terminal system monitors clutter background map sparse matrix compressed data and display and control commands sent by a radar detection system in real time;
(D2) storing the received display control command data into a control data queue in a priority queue mode;
and (D3) storing the received clutter background map sparse matrix compressed data into a clutter background map display data queue in a priority queue mode.
The transmission method of the radar clutter background map compressed data based on the UDP communication comprises the step (E) that a display and control terminal data processing subsystem in a radar display and control terminal system sends control command data to a radar detection system according to a priority mode and displays the corresponding clutter background map through the display and control terminal display subsystem, and comprises the following steps,
(E1) creating a thread, and sending clutter background image data corresponding to the control command to a radar detection system at intervals by adopting a UDP communication mode according to high priority;
(E2) and creating a thread, and sending the data in the clutter background map data queue to a display control terminal display subsystem in a low-priority mode to display the clutter background map.
The invention has the beneficial effects that: the invention relates to a UDP communication-based radar clutter background map compressed data transmission method, which solves the problems that a radar system transmits a detected clutter background map to a display and control terminal, the data volume is too large, and the real-time performance is low, and the problem that when the display and control terminal receives the clutter background map data, the data loss rate of a control command sent to a radar detection system is high, and has the following advantages that:
(1) the data transmission rate is high, on the basis of a UDP communication protocol, a hundred-megabyte or kilomega Ethernet card is used for transmitting data by taking bytes as a unit, three-way handshaking of a Tcp protocol and frequently-linked resource occupation are omitted, and the real-time requirement of data transmission and display of the clutter background image is met;
(2) the clutter background map is optimized in a feedforward neural network mode to transmit data, so that the data transmission quantity is further reduced, and the data transmission rate is improved;
(3) forming a real-time memory data stream of the clutter background image by the clutter background image in a beam-by-beam manner according to the detection angle and the detection distance, and forming a three-dimensional matrix by the real-time memory data stream, so that the data volume of the clutter background image can be reduced, and the information carried by the clutter background image can be accurately reflected;
(4) the display control command and the clutter background map data are stored in a priority queue mode, the control command data are responded preferentially, and the success rate of normal transmission of the display control data in a clutter background map and a high-bandwidth-occupation scene can be improved.
Drawings
FIG. 1 is a flow chart of the transmission method of compressed data of a radar clutter background map based on UDP communication according to the invention;
fig. 2 is a schematic data transmission diagram of the radar display and control terminal system of the radar detection system of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the method for transmitting compressed data of a radar clutter background map based on UDP communication according to the present invention includes the following steps,
step (A), after the radar detection system detects the clutter background image, the clutter background image forms the real-time memory data flow of the clutter background image in a beam-by-beam manner according to the detection angle and the detection distance, and the real-time memory data flow forms a three-dimensional matrix, comprising the following steps,
(A1) the clutter background image preprocessing subsystem in the radar detection system detects radar from a first wave beam of a starting detection angle, all clutter background image points in a distance range form a wave beam clutter background image data stream according to distance, angle and speed, and the real-time memory data stream of the clutter background image is formed in sequence by wave beams;
(A2) (A2), forming a three-dimensional matrix from the real-time memory data streams of all the wave beam clutter background maps, and issuing the three-dimensional matrix to the shared memory in a data stream mode, wherein three dimensions of the three-dimensional matrix are respectively distance, angle and speed, and the value of the three-dimensional matrix represents amplitude, and the specific method for converting the three-dimensional matrix into the data stream mode to issue the data stream mode to the shared memory is to define a three-dimensional array in the memory, wherein the array is defined as: m [ distance ] [ angle ] [ speed ], correspondingly mapping the values of all the wave beam clutter background images to a three-dimensional matrix, completing the formation of the real-time memory data streams of all the wave beam clutter background images into the three-dimensional matrix, and issuing the three-dimensional matrix to a shared memory;
step (B), constructing a sparse matrix of the clutter background map by utilizing the three-dimensional matrix of the step (A) after optimizing by utilizing a feedforward neural network, comprising the following steps,
(B1) processing a three-dimensional matrix of the clutter background map by using a feedforward neural network and an evaluation index to form an alternative matrix, wherein the alternative matrix is classified according to the weight of the clutter background map, and the weight is calculated according to the signal clutter ratio of the point of a single clutter background map in the three-dimensional matrix in the distance dimension and the amplitude;
(B2) evaluating and optimizing the alternative matrix by using the feedforward neural network evaluation index, recording an optimization parameter, and feeding back the optimization parameter to (B1);
(B3) screening signal points with high weight layer by layer according to the weight of the clutter background map, repeating (B1) - (B2) until the signal clutter ratio of the points of the single clutter background map in the distance dimension and the amplitude reaches a parameter optimization threshold range, judging the signal clutter ratio as convergence, and taking the signal clutter ratio as a final optimization parameter, wherein the parameter optimization threshold is automatically set according to different clutter background maps and can be adjusted according to needs;
compressing the sparse matrix of the clutter background image to form clutter background image sparse matrix compressed data, and sending the clutter background image sparse matrix compressed data to a radar display and control terminal system through a radar data transmission subsystem in a radar detection system in a UDP (user Datagram protocol) communication mode;
step (D), a display control terminal data processing subsystem in the radar display control terminal system monitors a display control command and clutter background map sparse matrix compressed data in real time and classifies the monitored display control command and clutter background map sparse matrix compressed data to form queues with different priorities, comprising the following steps,
(D1) a display and control terminal data processing subsystem in the radar display and control terminal system monitors clutter background map sparse matrix compressed data and display and control commands sent by a radar detection system in real time;
(D2) storing the received display control command data into a control data queue in a priority queue mode;
(D3) storing the received clutter background map sparse matrix compressed data into a clutter background map display data queue in a priority queue mode;
step (E), a display and control terminal data processing subsystem in the radar display and control terminal system sends control command data to the radar detection system according to a priority mode, and displays a corresponding clutter background map through the display and control terminal display subsystem, as shown in figure 2, the method comprises the following steps,
(E1) creating a thread, and sending clutter background image data corresponding to the control command to a radar detection system at intervals by adopting a UDP communication mode according to high priority;
(E2) and creating a thread, and sending the data in the clutter background map data queue to a display control terminal display subsystem in a low-priority mode to display the clutter background map.
In summary, the transmission method of UDP-based radar clutter background map compressed data of the present invention solves the problems of excessive data amount and low real-time performance of the radar system transmitting the detected clutter background map to the display and control terminal, and the problem of high data loss rate of the display and control terminal sending the control command to the radar detection system when receiving the clutter background map data, and has the following advantages:
(1) the data transmission rate is high, on the basis of a UDP communication protocol, a hundred-megabyte or kilomega Ethernet card is used for transmitting data by taking bytes as a unit, three-way handshaking of a Tcp protocol and frequently-linked resource occupation are omitted, and the real-time requirement of data transmission and display of the clutter background image is met;
(2) the clutter background map is optimized in a feedforward neural network mode to transmit data, so that the data transmission quantity is further reduced, and the data transmission rate is improved;
(3) forming a real-time memory data stream of the clutter background image by the clutter background image in a beam-by-beam manner according to the detection angle and the detection distance, and forming a three-dimensional matrix by the real-time memory data stream, so that the data volume of the clutter background image can be reduced, and the information carried by the clutter background image can be accurately reflected;
(4) the display control command and the clutter background map data are stored in a priority queue mode, the control command data are responded preferentially, and the success rate of normal transmission of the display control data in a clutter background map and a high-bandwidth-occupation scene can be improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The transmission method of the radar clutter background map compressed data based on UDP communication is characterized in that: comprises the following steps of (a) carrying out,
step (A), after the clutter background image is detected by the radar detection system, the clutter background image is formed into a real-time memory data stream of the clutter background image in a beam-by-beam manner according to the detection angle and the detection distance, the real-time memory data stream is formed into a three-dimensional matrix,
step (B), the three-dimensional matrix in the step (A) is optimized by utilizing a feedforward neural network to construct a sparse matrix of a clutter background image;
compressing the sparse matrix of the clutter background image to form clutter background image sparse matrix compressed data, and sending the clutter background image sparse matrix compressed data to a radar display and control terminal system through a radar data transmission subsystem in a radar detection system in a UDP (user Datagram protocol) communication mode;
step (D), a display and control terminal data processing subsystem in the radar display and control terminal system monitors a display and control command and clutter background map sparse matrix compressed data in real time, and the monitored display and control command and clutter background map sparse matrix compressed data are respectively formed into two queues with different priorities according to classification;
and (E) the display and control terminal data processing subsystem in the radar display and control terminal system sends control command data to the radar detection system according to the priority mode, and the display and control terminal display subsystem displays the corresponding clutter background image.
2. The transmission method of compressed data of a radar clutter background map based on UDP communication according to claim 1, wherein: step (A), forming a real-time memory data stream of the clutter background image by the clutter background image according to the detection angle and the detection distance in a beam-by-beam manner, and forming a three-dimensional matrix by the real-time memory data stream, comprising the following steps,
step (A1), a clutter background map preprocessing subsystem in the radar detection system detects the radar on a first wave beam of a starting detection angle, all clutter background map points in a distance range form a wave beam clutter background map data stream according to distance, angle and speed, and the real-time memory data stream of the clutter background map is formed sequentially wave beam by wave beam;
step (a 2), forming a three-dimensional matrix from the real-time memory data streams of all the beam clutter background maps, and issuing the three-dimensional matrix to the shared memory in a data stream manner, where three dimensions of the three-dimensional matrix are distance, angle, and speed, respectively, and a value of the three-dimensional matrix represents an amplitude, and a specific method for converting the three-dimensional matrix into a data stream manner to issue the data stream manner to the shared memory is to define a three-dimensional array in the memory, where the array is defined as: and M [ distance ] [ angle ] [ speed ], correspondingly mapping the values of all the beam clutter background maps into a three-dimensional matrix, completing real-time memory data streams of all the beam clutter background maps to form the three-dimensional matrix, and issuing the three-dimensional matrix to a shared memory.
3. The method for transmitting compressed data of a radar clutter background map based on UDP communication according to claim 1, wherein: step (B), constructing a sparse matrix of the clutter background map by utilizing the feedforward neural network after optimization, comprising the following steps,
step (B1), a feedforward neural network and an evaluation index are utilized to process the three-dimensional matrix of the clutter background map to form an alternative matrix, the alternative matrix is classified according to the weight of the clutter background map, and the weight is calculated according to the signal clutter ratio of the point of a single clutter background map in the three-dimensional matrix in the distance dimension and the amplitude;
step (B2), evaluating and optimizing the alternative matrix by using the feedforward neural network evaluation index, and recording optimization parameters;
and (B3) screening signal points with high weight layer by layer according to the weight of the clutter background map, feeding the optimization parameters of the step (B2) back to the step (B1) to form a new alternative matrix, and repeating the steps (B1) to (B2) until the signal clutter ratio of the point of the single clutter background map in the distance dimension and the amplitude reaches a parameter optimization threshold range, and determining convergence as the final optimization parameters.
4. The transmission method of compressed data of a radar clutter background map based on UDP communication according to claim 1, wherein: step (D), a display control terminal data processing subsystem in the radar display control terminal system monitors a display control command and clutter background map sparse matrix compressed data in real time and classifies the monitored display control command and clutter background map sparse matrix compressed data to form queues with different priorities, comprising the following steps,
step (D1), a display and control terminal data processing subsystem in the radar display and control terminal system monitors clutter background map sparse matrix compressed data and display and control commands sent by a radar detection system in real time;
step (D2), store the received display control command data into the control data queue in a priority queue mode;
and (D3) storing the received clutter background map sparse matrix compressed data into a clutter background map display data queue in a priority queue mode.
5. The transmission method of compressed data of a radar clutter background map based on UDP communication according to claim 1, wherein: step (E), the display and control terminal data processing subsystem in the radar display and control terminal system sends control command data to the radar detection system according to the priority mode and displays the corresponding clutter background map through the display and control terminal display subsystem, comprising the following steps,
step (E1), a thread is created, and clutter background map data corresponding to the control command is sent to the radar detection system at intervals by adopting a UDP communication mode according to high priority;
and (E2) creating a thread, and sending the data in the clutter background map data queue to the display subsystem of the display and control terminal in a low-priority mode to display the clutter background map.
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