CN115356717A - Distance occlusion solving target detection method and device, computer equipment and medium - Google Patents
Distance occlusion solving target detection method and device, computer equipment and medium Download PDFInfo
- Publication number
- CN115356717A CN115356717A CN202211276469.9A CN202211276469A CN115356717A CN 115356717 A CN115356717 A CN 115356717A CN 202211276469 A CN202211276469 A CN 202211276469A CN 115356717 A CN115356717 A CN 115356717A
- Authority
- CN
- China
- Prior art keywords
- distance
- repetition frequency
- target object
- coherent
- frequency parameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/581—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of interrupted pulse modulated waves and based upon the Doppler effect resulting from movement of targets
- G01S13/582—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of interrupted pulse modulated waves and based upon the Doppler effect resulting from movement of targets adapted for simultaneous range and velocity measurements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G3/00—Aiming or laying means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The application provides a target detection method, a target detection device, computer equipment and a medium for solving distance blocking, and relates to the technical field of radars. The method comprises the following steps: the method comprises the steps of obtaining an echo signal received by the air defense radar at a first coherent processing time based on a transmitted coherent pulse signal, judging whether a target object is in a distance shielding area within the first coherent processing time according to the echo signal, and obtaining a detection result of the ground radar for the target object, wherein the method comprises the following steps: if the target object is in a distance shielding area within the first coherent processing time, recalculating a first repetition frequency parameter according to the repetition frequency parameter, the speed range and the fuzzy distance of the coherent pulse signal; and continuously transmitting the coherent pulse signals according to the first repetition frequency parameter in the second coherent processing time, so that the target object is not in the distance occlusion area in the second coherent processing time. The method and the device ensure that the target object is not shielded in the detection process, and realize accurate detection of the target object.
Description
Technical Field
The invention relates to the technical field of radars, in particular to a distance occlusion solving target detection method and device, computer equipment and a medium.
Background
In the field of air defense radar, in order to detect a target with a long distance, a Pulse Doppler (PD) radar system with high repetition frequency and high duty ratio is often adopted for target detection.
The pulse Doppler radar is arranged in a seeker of the guided weapon, a transmitting antenna and a receiving antenna of the pulse Doppler radar are shared in a time-sharing mode, a coherent pulse signal is transmitted in a transmitting system, a receiving system is in a closed state, and therefore the situation that when the coherent pulse signal is transmitted, the signal leaks to the receiving system to burn out a high-frequency receiver is avoided.
However, when the echo signal of the target object returns, if the transmitting system is in the transmitting state, the receiving system is in the closed state at this time, so that the echo signal of the target object cannot be received, which is called a blocking phenomenon.
Disclosure of Invention
The present invention aims to provide a method, an apparatus, a computer device and a medium for detecting a target with a solution to distance occlusion, so as to ensure that the target is not occluded during the detection process, thereby realizing accurate detection of the target.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a method for detecting a target with a solution to distance occlusion, where the method includes:
acquiring an echo signal received by the air defense radar at a first coherent processing time based on a transmitted coherent pulse signal, wherein the echo signal is a signal obtained by reflecting the coherent pulse signal by a target object;
judging whether the target object is in a distance shielding area within the first coherent processing time according to the echo signal;
acquiring detection results of a ground radar for the target object, wherein the detection results comprise: a speed range of the target object, and a blur distance of the target object;
if the target object is in a distance shielding area within the first coherent processing time, recalculating a first repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the speed range and the fuzzy distance;
and continuously transmitting the coherent pulse signals according to the first repetition frequency parameter within a second coherent processing time, so that the target object is not in a distance occlusion area within the second coherent processing time.
Optionally, the repetition frequency parameter includes: the recalculating a first repetition frequency parameter according to a repetition frequency parameter of the coherent pulse signal, the speed range and the ambiguity distance comprises:
calculating a maximum unambiguous distance from the pulse repetition frequency;
calculating a distance fuzzy number according to the fuzzy distance and the maximum non-fuzzy distance;
recalculating a first maximum unambiguous distance according to the maximum unambiguous distance, the distance ambiguity number, the duty ratio and the speed range;
calculating a first pulse repetition frequency according to the first maximum unambiguous distance, wherein the first repetition frequency parameter comprises: the first pulse repetition frequency and the duty cycle.
Optionally, the recalculating the first maximum unambiguous distance according to the maximum unambiguous distance, the distance ambiguity number, the duty cycle, and the speed range includes:
calculating a new distance fuzzy number according to the maximum unambiguous distance number, the distance fuzzy number and the maximum value of the speed range;
recalculating the first maximum unambiguous distance from the maximum unambiguous distance, the new distance ambiguity number, the duty cycle and the speed range.
Optionally, the method further includes:
if the target object is not in the distance shielding area within the first coherent processing time, calculating the moving speed of the target object according to the echo signal;
recalculating a second repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal and the moving speed;
and continuing to transmit the coherent pulse signal according to the second repetition frequency parameter within a second coherent processing time, so that the target object is not in the range occlusion area continuously within the second coherent processing time.
Optionally, the repetition frequency parameter includes: the pulse repetition frequency and the duty ratio of the coherent pulse signal, and the recalculating a second repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal and the moving speed, includes:
calculating a maximum unambiguous distance from the pulse repetition frequency;
calculating a distance ambiguity number according to an ambiguity distance and the maximum unambiguous distance, wherein the ambiguity distance is an ambiguity distance between the target object detected by the ground radar and the air defense radar;
calculating the variation of the repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the distance fuzzy number and the moving speed;
recalculating a second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation;
calculating a second pulse repetition frequency according to the second maximum unambiguous distance, wherein the second repetition frequency parameter comprises: the second pulse repetition frequency and the duty cycle, wherein the second pulse repetition frequency is within a preset frequency range.
Optionally, the calculating a change amount of the repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the distance ambiguity number, and the moving speed includes:
calculating a first repetition frequency parameter variation according to the pulse repetition frequency, the distance fuzzy number and the moving speed by adopting a first calculation mode;
the recalculating a second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation includes:
and recalculating the second maximum unambiguous distance according to the difference between the maximum unambiguous distance and the first repetition frequency parameter variation.
Optionally, the calculating a change amount of the repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the distance ambiguity number, and the moving speed includes:
calculating a second repetition frequency parameter variable quantity by adopting a second calculation mode according to the pulse repetition frequency, the distance fuzzy number and the moving speed;
the recalculating a second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation includes:
and recalculating the second maximum unambiguous distance according to the sum of the maximum unambiguous distance and the second repetition parameter variation.
In a second aspect, an embodiment of the present application further provides a device for detecting a target with a solution to distance blocking, where the device includes:
the signal acquisition module is used for acquiring an echo signal received by the air defense radar based on a transmitted coherent pulse signal in a first coherent processing time, wherein the echo signal is a signal obtained by reflecting the coherent pulse signal by a target object;
the shielding judgment module is used for judging whether the target object is in a distance shielding area within the first coherent processing time according to the echo signal;
a speed and distance obtaining module, configured to obtain a detection result of the ground radar with respect to the target object, where the detection result includes: a speed range of the target object, and a blur distance of the target object;
a repetition frequency parameter calculation module, configured to recalculate the first repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the speed range, and the fuzzy distance if the target object is in a distance occlusion area within the first coherent processing time;
and the pulse signal sending module is used for continuously sending the coherent pulse signals according to the first repetition frequency parameter within the second coherent processing time so as to enable the target object not to be in the distance occlusion area within the second coherent processing time.
Optionally, the repetition frequency parameter includes: the pulse repetition frequency and the duty ratio of the coherent pulse signal, and the repetition frequency parameter calculation module comprise:
a maximum unambiguous distance calculation unit for calculating a maximum unambiguous distance from the pulse repetition frequency;
the distance fuzzy number calculating unit is used for calculating a distance fuzzy number according to the fuzzy distance and the maximum unambiguous distance;
a first maximum unambiguous distance recalculation unit configured to recalculate a first maximum unambiguous distance based on the maximum unambiguous distance, the distance ambiguity number, the duty ratio, and the speed range;
a first repetition frequency parameter calculating unit, configured to calculate a first pulse repetition frequency according to the first maximum unambiguous distance, where the first repetition frequency parameter includes: the first pulse repetition frequency and the duty cycle.
Optionally, the first maximum unambiguous distance recalculation unit includes:
the distance fuzzy number determining subunit is used for calculating a new distance fuzzy number according to the maximum unambiguous distance number, the distance fuzzy number and the maximum value of the speed range;
a first maximum unambiguous distance recalculation subunit, configured to recalculate the first maximum unambiguous distance based on the maximum unambiguous distance, the new distance ambiguity number, the duty cycle, and the speed range.
Optionally, the apparatus further comprises:
a moving speed calculation module, configured to calculate a moving speed of the target object according to the echo signal if the target object is not located in the distance occlusion area within the first coherent processing time;
the repetition frequency parameter calculation module is further configured to recalculate a second repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal and the moving speed;
the pulse signal sending module is further configured to continue to send the coherent pulse signal according to the second repetition frequency parameter within the second coherent processing time, so that the target object does not stay within the distance occlusion area within the second coherent processing time.
Optionally, the repetition frequency parameter includes: the pulse repetition frequency and the duty ratio of the coherent pulse signal, and the repetition frequency parameter calculation module comprise: the maximum unambiguous distance calculation unit, the distance ambiguity number calculation unit, the repetition frequency parameter variation calculation unit, the second maximum unambiguous distance recalculation unit and the second repetition frequency parameter calculation unit;
the repetition frequency parameter variation calculating unit is used for calculating the repetition frequency parameter variation according to the repetition frequency parameter of the coherent pulse signal, the distance fuzzy number and the moving speed;
the second maximum unambiguous distance recalculation unit is used for recalculating a second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation;
the second repetition frequency parameter calculating unit is configured to calculate a second pulse repetition frequency according to the second maximum unambiguous distance, where the second repetition frequency parameter includes: the second pulse repetition frequency and the duty cycle, wherein the second pulse repetition frequency is within a preset frequency range.
Optionally, the repetition frequency parameter variation calculating unit is specifically configured to calculate a first repetition frequency parameter variation by using a first calculation manner according to the pulse repetition frequency, the distance ambiguity number, and the moving speed;
the second maximum unambiguous distance recalculating unit is specifically configured to recalculate the second maximum unambiguous distance according to a difference between the maximum unambiguous distance and the first repetition parameter variation.
Optionally, the repetition frequency parameter variation calculating unit is further configured to calculate a second repetition frequency parameter variation by using a second calculation method according to the pulse repetition frequency, the distance ambiguity number, and the moving speed;
the second maximum unambiguous distance recalculation unit is further configured to recalculate the second maximum unambiguous distance according to the sum of the maximum unambiguous distance and the second repetition parameter variation.
In a third aspect, an embodiment of the present application further provides a computer device, including: a processor, a storage medium and a bus, wherein the storage medium stores program instructions executable by the processor, when the computer device runs, the processor and the storage medium communicate with each other through the bus, and the processor executes the program instructions to perform the steps of the distance occlusion solving target detection method according to any one of the first aspect.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, where the storage medium stores a computer program, and the computer program is executed by a processor to perform the steps of the distance occlusion solving target detection method according to any one of the first aspect.
The beneficial effect of this application is:
the application provides a target detection method, device, computer equipment and medium for solving distance occlusion, which are characterized in that whether a target object is in a distance occlusion area in first coherent processing time is judged according to an echo signal received by an air defense radar based on a transmitted coherent pulse signal in the first coherent processing time, and a detection result of the ground radar for the target object is obtained, wherein the detection result comprises: if the target object is in a distance shielding area within the first coherent processing time, recalculating a first repetition frequency parameter according to the repetition frequency parameter, the speed range and the fuzzy distance of the coherent pulse signal; and continuously transmitting the coherent pulse signals according to the first repetition frequency parameter in the second coherent processing time, so that the target object is not in the distance occlusion area in the second coherent processing time. According to the method and the device, the actual distance and the accurate speed of the target object do not need to be determined, and the solution distance shielding of the target object is realized under the condition that the accurate distance of the target object is not determined through self-adaptive repetition frequency parameter calculation, so that the target object is not in a distance shielding area, and the accuracy of the air defense radar in detecting the target object is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic flowchart of a method for detecting a target with a solution to distance occlusion according to an embodiment of the present application;
fig. 2 is a schematic flowchart of another distance occlusion solution target detection method according to an embodiment of the present application;
fig. 3 is a schematic flowchart of another distance occlusion solving target detection method according to an embodiment of the present application;
fig. 4 is a schematic flowchart of another distance occlusion solving target detection method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a distance occlusion solution target detection apparatus according to an embodiment of the present application;
fig. 6 is a schematic diagram of a computer device provided in an embodiment of the present application.
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.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Furthermore, the terms "first," "second," and the like in the description and in the claims, as well as in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
The method, the device, the computer equipment and the medium for detecting the target with the solution of the distance occlusion are applied to detection of a guided weapon on a target object, a transmitting system, a receiving system and a control system of an air defense radar are arranged in a guiding head of the guided weapon, and the control system is used for controlling repetition frequency parameters of coherent pulse signals transmitted by the transmitting system within first coherent processing time and recalculating the repetition frequency parameters within second coherent processing time in a self-adaptive manner according to echo signals so as to control the transmitting system to continuously transmit the coherent pulse signals within the second coherent processing time. The air defense radar related to the application is a pulse Doppler radar.
In the existing target detection method, because the air defense radar does not determine the accurate distance of a target object, and the pulse repetition frequency of a coherent pulse signal transmitted by a transmitting system is not accurate, when an echo signal of the target object returns, the transmitting system enters a transmitting state again, and a receiving system is closed, so that the receiving system does not completely receive the echo signal, the accurate moving speed of the target object cannot be determined according to the echo signal, and the phenomenon that the complete echo signal cannot be received due to the accurate distance of the target object is not determined is called distance blocking.
Based on the foregoing technical problem, embodiments of the present application provide a method, an apparatus, a computer device, and a medium for detecting a target that solves distance occlusion.
Referring to fig. 1, a schematic flow chart of a method for detecting a target with a solution to distance blocking according to an embodiment of the present application is shown in fig. 1, where the method includes:
s10: and acquiring an echo signal received by the air defense radar based on the transmitted coherent pulse signal in the first coherent processing time, wherein the echo signal is a signal obtained by reflecting the coherent pulse signal by a target object.
In this embodiment, the air defense radar is a radar which is arranged in a guided weapon and is used for detecting a target object to be hit on the ground, the air defense radar is used for transmitting coherent pulse signals with high repetition frequency and high duty ratio, a transmitting system of the air defense radar transmits N coherent pulse signals with constant preset repetition frequency parameters in a transmitting time period of a first coherent processing time (CPI), and a receiving system of the air defense radar receives echo signals of the target object based on the reflection of the coherent pulse signals in a receiving time period of the first coherent processing time.
In one possible implementation manner, the ground radar is used for sending a striking instruction for the target object to the air defense radar, wherein the striking instruction comprises: the method comprises the steps that a fuzzy distance between a target object and the air defense radar and the speed range of the target object are obtained, and the air defense radar determines preset repetition frequency parameters of coherent pulse signals emitted within first coherent processing time according to the fuzzy distance between the target object and the air defense radar and the speed range of the target object.
S20: and judging whether the target object is in the distance shielding area within the first coherent processing time according to the echo signal.
In this embodiment, since the transmitting system does not determine the accurate distance between the air defense radar and the target object, the preset repetition frequency parameter after the N coherent pulse signals are transmitted within the first coherent processing time may be inaccurate, the coherent pulse signals transmitted based on the preset repetition frequency parameter may cause the air defense radar to be in the receiving state, the receiving system does not receive the echo signal when being turned on, or under the condition that the echo signal is not completely received, the air defense radar is switched to the transmitting state, the receiving system is turned off, the target object cannot be accurately detected through the echo signal, that is, the target object is in the distance shielding area.
In order to determine whether the coherent pulse signal based on the preset repetition frequency parameter within the first coherent processing time can accurately detect the target object, it is necessary to determine whether the target object is detected within the first coherent processing time according to the echo signal, determine whether the target object is located in the distance occlusion area, and if the target object is located in the distance occlusion area, determine that the coherent pulse signal based on the preset repetition frequency parameter within the first coherent processing time cannot accurately detect the target object.
In a possible implementation manner, a frequency spectrum analysis (FFT) may be performed on the echo signal to determine a distribution condition of the echo signal on different frequencies, and according to a frequency spectrum of the echo signal, whether the target object is detected within the first coherent processing time is determined, so as to determine whether the target object is located in the distance occlusion area.
When the frequency distribution of the echo signals is small, determining that the time overlap between the echo signal interval of the target object and the emission time window is larger than a preset overlap degree, and the target object is in a distance shielding area, wherein the time overlap between the echo signal interval of the target object and the emission time window refers to: the return time of the echo signal of the target object is overlapped with the transmitting time of the coherent pulse signal of the next period in the first coherent processing time, namely the air defense radar is switched to a transmitting state under the condition that the echo signal is not completely received, and the receiving system is closed. For example, when the time overlap of the echo signal interval of the target object and the transmission time window is determined to be greater than 2/3 according to the frequency distribution of the echo signals, the target object is determined to be in the distance occlusion area.
In some embodiments, after performing the spectrum analysis on the echo signal, a CFAR (Constant False Alarm Detector) may be used to detect the echo signal in the frequency domain to determine whether the echo signal detects the target object.
S30: acquiring a detection result of the ground radar for the target object, wherein the detection result comprises: the velocity range of the target object, and the blur distance of the target object.
In this embodiment, the ground radar detects the target object to determine the fuzzy distance between the target object and the air defense radar and the speed range of the target object.
S40: and if the target object is in the distance shielding area within the first coherent processing time, recalculating the first repetition frequency parameter according to the repetition frequency parameter, the speed range and the fuzzy distance of the coherent pulse signal.
In this embodiment, if the target object is located in the distance occlusion area within the first coherent processing time, it is determined that the target object is not detected by the echo signal, and the target object cannot be detected based on the coherent pulse signal with the repetition frequency parameter preset within the first coherent processing time, which requires recalculation of the preset repetition frequency parameter.
Specifically, the position range of the target object possibly appearing in the second coherent processing time is calculated according to the repetition frequency parameter of the coherent pulse signal, the speed range of the target object and the fuzzy distance between the target object and the air defense radar, and the first repetition frequency parameter is recalculated according to the position range.
S50: and continuously transmitting the coherent pulse signals according to the first repetition frequency parameter in the second coherent processing time, so that the target object is not in the distance occlusion area in the second coherent processing time.
In this embodiment, in the second coherent processing time, the transmitting system continues to transmit the coherent pulse signal according to the first repetition frequency parameter, so that after the receiving state receives the complete echo signal, the air defense radar switches to the transmitting state again, that is, there is no time overlap between the echo signal region of the target object and the transmission time window of the coherent pulse signal, or the time overlap is less than or equal to the preset overlap degree.
In the method for detecting a target to solve distance blocking provided in the foregoing embodiment, when it is determined that the target object is located in the distance blocking area based on the echo signal, the first repetition frequency parameter is recalculated according to the repetition frequency parameter of the coherent pulse signal, the speed range of the target object, and the fuzzy distance between the target object and the air defense radar, and the coherent pulse signal is transmitted according to the first repetition frequency parameter, so that it is ensured that the target object is not located in the distance blocking area.
On the basis of the above embodiments, the present application further provides another distance occlusion solving target detection method. Referring to fig. 2, a schematic flow chart of another distance occlusion solving target detection method according to an embodiment of the present invention is shown in fig. 2, where the step S40 of recalculating the first repetition frequency parameter according to the repetition frequency parameter, the speed range, and the fuzzy distance of the coherent pulse signal may include:
s41: the maximum unambiguous distance is calculated from the pulse repetition frequency.
S42: and calculating the distance fuzzy number according to the fuzzy distance and the maximum non-fuzzy distance.
S43: and recalculating the first maximum unambiguous distance according to the maximum unambiguous distance, the distance ambiguity number, the duty ratio and the speed range.
S44: calculating a first pulse repetition frequency according to the first maximum unambiguous distance, wherein the first repetition frequency parameter comprises: a first pulse repetition frequency and a duty cycle.
In some embodiments, the recalculating the first maximum unambiguous distance in S43, the maximum unambiguous distance, the distance ambiguity number, the duty cycle, and the speed range, may include:
calculating a new distance fuzzy number according to the maximum unambiguous distance number, the distance fuzzy number and the maximum value of the speed range; and recalculating the first maximum unambiguous distance according to the maximum unambiguous distance, the new distance ambiguity number, the duty ratio and the speed range.
In this embodiment, in the first coherent processing time, the preset repetition frequency parameter of the coherent pulse signal transmitted by the air defense radar includes: the pulse repetition frequency Fr0 and the duty ratio n, the maximum unambiguous distance Ru is the maximum distance of back and forth between continuously emitted coherent pulse signals, and the maximum unambiguous distance Ru is determined according to the pulse repetition frequency Fr0 and the speed of light.
For example, the maximum unambiguous distance Ru can be calculated as:
where c is the speed of light.
After the maximum unambiguous distance Ru is determined, the distance ambiguity number is determined according to the ambiguity distance R0 between the target object and the air defense radar determined by the ground radar and the maximum unambiguous distance Ru
Wherein, in the step (A),
meaning rounding down.
Under the condition that the target object is located in the distance occlusion area within the first coherent processing time, determining that the time overlap between the echo signal interval of the target object and the emission time window is greater than a preset overlap degree, and determining the distance range between the target object and the air defense radar within the first coherent processing time, for example, the distance range between the target object and the air defense radar within the first coherent processing time may be represented as:
according to the speed range of the target object moving
And calculating the distance range between the target object and the air defense radar in the second coherent processing time, wherein the distance range between the target object and the air defense radar in the second coherent processing time can be expressed as:
wherein, tr0 is the period of the coherent pulse signal, and Tr0=1/Fr0.
Assuming that the first maximum unambiguous distance of the recalculated first pulse repetition frequency Fr1 in the second coherent processing time is Ru1 and the corresponding new distance ambiguity number is M, the first maximum unambiguous distance Ru1 and the new distance ambiguity number M should satisfy the following conditions:
wherein the content of the first and second substances,
where ceil denotes rounding up.
Based on the above conditions, a new distance ambiguity number is calculated, and an appropriate first maximum unambiguous distance Ru1 satisfying the above conditions is calculated from the new distance ambiguity number, and a first pulse repetition frequency is calculated from the first maximum unambiguous distance Ru1 and the speed of light c.
The distance occlusion solving target detection method provided by the embodiment does not need to determine the actual distance and the accurate speed of the target object, and realizes distance occlusion solving on the target object by calculating the self-adaptive repetition frequency parameter under the condition that the accurate distance of the target object is not determined, so that the target object is not in a distance occlusion area, and the accuracy of the air defense radar in detecting the target object is improved.
On the basis of the above embodiments, the embodiments of the present application further provide another distance occlusion solving target detection method. Referring to fig. 3, a schematic flow chart of another distance occlusion solution target detection method provided in the embodiment of the present application is shown, and as shown in fig. 3, the method may further include:
s10: and acquiring an echo signal received by the air defense radar at the first coherent processing time based on the transmitted coherent pulse signal, wherein the echo signal is a signal obtained by reflecting the coherent pulse signal by a target object.
S20: and judging whether the target object is in the distance shielding area within the first coherent processing time according to the echo signal.
S60: and if the target object is not in the distance shielding area within the first coherent processing time, calculating the moving speed of the target object according to the echo signal.
In this embodiment, if the target object is not located in the distance occlusion area within the first coherent processing time, it is determined that the echo signal detects the target object, and the target object may be detected based on the coherent pulse signal with the repetition frequency parameter preset within the first coherent processing time, and the moving speed of the target object may be calculated by using a CFAR algorithm.
S70: and recalculating the second repetition frequency parameter according to the repetition frequency parameter and the moving speed of the coherent pulse signal.
In this embodiment, based on the detected accurate moving speed of the target object, in order to ensure that the target object is still not located in the distance occlusion area within the second coherent processing time, the second repetition frequency parameter needs to be recalculated. Specifically, the moving distance of the target object is calculated according to the moving speed of the target object, and the second repetition frequency parameter is calculated according to the repetition frequency parameter and the moving distance of the coherent pulse signal.
S80: and continuously transmitting the coherent pulse signals according to the second repetition frequency parameter in the second coherent processing time, so that the target object is not in the range occlusion area continuously in the second coherent processing time.
In this embodiment, in the second coherent processing time, the transmitting system continues to transmit the coherent pulse signal according to the second repetition frequency parameter, so that after the receiving state receives the complete echo signal, the air defense radar switches to the transmitting state again, that is, in the second coherent processing time, the target object is not in the distance occlusion area continuously. When the target object is not in the distance shielding area continuously, the air defense radar can determine the moving speed of the target object according to the echo signal.
In the method for detecting a target with a solution to distance blocking provided in the above embodiment, when it is determined that the target object is not located in the distance blocking area based on the echo signal, the second repetition frequency parameter is recalculated according to the moving speed of the target object determined by the echo signal, and the coherent pulse signal is transmitted according to the second repetition frequency parameter, so as to ensure that the target object is not located in the distance blocking area continuously.
On the basis of the above embodiments, the embodiments of the present application further provide another method for detecting a target that solves distance occlusion. Referring to fig. 4, a schematic flow chart of another method for detecting a target with a solution to range occlusion according to an embodiment of the present application is shown in fig. 4, where the step S70 of recalculating the second repetition frequency parameter according to the repetition frequency parameter and the moving speed of the coherent pulse signal may include:
s71: the maximum unambiguous distance is calculated from the pulse repetition frequency.
S72: and calculating the distance fuzzy number according to the fuzzy distance and the maximum non-fuzzy distance.
S73: and calculating the variation of the repetition frequency parameter according to the repetition frequency parameter, the distance fuzzy number and the moving speed of the coherent pulse signal.
S74: and recalculating the second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation.
S75: calculating a second pulse repetition frequency according to the second maximum unambiguous distance, the second repetition frequency parameter comprising: a second pulse repetition frequency and a duty cycle, wherein the second pulse repetition frequency is within a preset frequency range.
In this embodiment, in the process of calculating the maximum unambiguous distance Ru according to the pulse repetition frequency in S71, reference may be made to the process of calculating the distance ambiguity number according to the ambiguity distance and the maximum unambiguous distance in S41 and S72, reference may be made to the process of S42, and details are not repeated in this embodiment.
After the maximum unambiguous distance Ru and the distance ambiguity number N are determined, the change amount of the repetition frequency parameter is calculated according to the moving speed of the target object detected by the echo signal and the repetition frequency parameter of the coherent pulse signal, the maximum unambiguous distance is adjusted according to the change amount of the repetition frequency parameter to obtain a second maximum unambiguous distance Ru2, and the first pulse repetition frequency is calculated according to the second maximum unambiguous distance Ru2 and the light speed c, wherein the duty ratio can still adopt the duty ratio N in the first coherent processing time, and can also be adjusted to other duty ratios.
It should be noted that, two adjustment manners for adjusting the maximum unambiguous distance according to the variation of the repetition frequency parameter are: the repetition frequency parameter variation is subtracted from the maximum unambiguous distance, or the repetition frequency parameter variation is added to the maximum unambiguous distance, one of two adjustment modes can be randomly selected, and the second pulse repetition frequency calculated according to the adjusted second maximum unambiguous distance is within a preset frequency range.
In one possible implementation mode, a first calculation mode is adopted to calculate a first repetition frequency parameter variable quantity according to the pulse repetition frequency, the distance fuzzy number and the moving speed; and recalculating the second maximum unambiguous distance according to the difference between the maximum unambiguous distance and the first repetition frequency parameter variation.
In this embodiment, the transmission period Tr0 of the coherent pulse signal in the first coherent processing time is calculated according to the pulse repetition frequency Fr0 in the first coherent processing time, the moving distance of the target object is calculated according to the transmission period Tr0 and the moving speed V, the first repetition frequency parameter variation is calculated by using the first calculation method according to the moving distance, the maximum unambiguous distance Ru, and the distance ambiguity number N, and the second maximum unambiguous distance Ru2 is calculated according to the difference between the maximum unambiguous distance Ru and the first repetition frequency parameter variation.
In another possible implementation manner, a second calculation manner is adopted to calculate a second repetition frequency parameter variation according to the pulse repetition frequency, the distance fuzzy number and the moving speed; and recalculating the second maximum unambiguous distance according to the sum of the maximum unambiguous distance and the second repetition frequency parameter variation.
In this embodiment, the transmission period Tr0 of the coherent pulse signal in the first coherent processing time is calculated from the pulse repetition frequency Fr0 in the first coherent processing time, the moving distance of the target object is calculated from the transmission period Tr0 and the moving speed V, the second maximum unambiguous distance Ru2 is calculated from the sum of the maximum unambiguous distance and the second repetition parameter variation by using the first calculation method based on the moving distance, the maximum unambiguous distance Ru, and the distance ambiguity number N.
For example, the calculation formula for calculating the second maximum unambiguous distance Ru2 from the difference between the maximum unambiguous distance and the first repetition parameter variation and from the sum of the maximum unambiguous distance and the second repetition parameter variation may be expressed as:
where Ceil represents rounding up.
In some embodiments, the second maximum unambiguous distance may be calculated according to a difference between the maximum unambiguous distance and the first change amount of the repetition frequency parameter, or according to a sum of the maximum unambiguous distance and the second change amount of the repetition frequency parameter, and the two calculation manners may be alternately selected, or one of the calculation manners may be used for calculation, and after the second pulse repetition frequency exceeds a preset frequency range, the calculation is switched to another calculation manner, which is not limited in this embodiment.
On the basis of the above embodiment, the embodiment of the present application further provides a target detection device for solving distance occlusion. Referring to fig. 5, a schematic structural diagram of a target detection apparatus for resolving distance blocking according to an embodiment of the present application is shown in fig. 5, where the apparatus includes:
the signal acquisition module 10 is configured to acquire an echo signal received by the air defense radar based on a transmitted coherent pulse signal at a first coherent processing time, where the echo signal is a signal obtained by reflecting the coherent pulse signal by a target object;
the occlusion judging module 20 is configured to judge whether the target object is located in the distance occlusion area within the first coherent processing time according to the echo signal;
a speed and distance obtaining module 30, configured to obtain a detection result of the ground radar with respect to the target object, where the detection result includes: the speed range of the target object, and the fuzzy distance of the target object;
the repetition frequency parameter calculation module 40 is configured to recalculate the first repetition frequency parameter according to the repetition frequency parameter, the speed range, and the fuzzy distance of the coherent pulse signal if the target object is in the distance occlusion region within the first coherent processing time;
and the pulse signal sending module 50 is configured to continue to send the coherent pulse signal according to the first repetition frequency parameter within the second coherent processing time, so that the target object is not within the distance occlusion area within the second coherent processing time.
Optionally, the repetition frequency parameter includes: the pulse repetition frequency and duty ratio of the coherent pulse signal, repetition frequency parameter calculation module 40 includes:
a maximum unambiguous distance calculation unit for calculating a maximum unambiguous distance from the pulse repetition frequency;
the distance fuzzy number calculating unit is used for calculating a distance fuzzy number according to the fuzzy distance and the maximum non-fuzzy distance;
the first maximum unambiguous distance recalculation unit is used for recalculating the first maximum unambiguous distance according to the maximum unambiguous distance, the distance ambiguity number, the duty ratio and the speed range;
a first repetition frequency parameter calculating unit, configured to calculate a first pulse repetition frequency according to the first maximum unambiguous distance, where the first repetition frequency parameter includes: a first pulse repetition frequency and a duty cycle.
Optionally, the first maximum unambiguous distance recalculation unit includes:
the distance fuzzy number determining subunit is used for calculating a new distance fuzzy number according to the maximum unambiguous distance number, the distance fuzzy number and the maximum value of the speed range;
and the first maximum unambiguous distance recalculation subunit is used for recalculating the first maximum unambiguous distance according to the maximum unambiguous distance, the new distance ambiguity number, the duty ratio and the speed range.
Optionally, the apparatus further comprises:
the moving speed calculation module is used for calculating the moving speed of the target object according to the echo signal if the target object is not in the distance shielding area within the first coherent processing time;
the repetition frequency parameter calculation module 40 is further configured to recalculate a second repetition frequency parameter according to the repetition frequency parameter and the moving speed of the coherent pulse signal;
and the pulse signal sending module 50 is further configured to continue to send the coherent pulse signal according to the second repetition frequency parameter within the second coherent processing time, so that the target object does not stay in the distance occlusion area for the second coherent processing time.
Optionally, the repetition frequency parameter includes: the pulse repetition frequency and duty ratio of the coherent pulse signal, repetition frequency parameter calculation module 40 includes: the device comprises a maximum unambiguous distance calculation unit, a distance ambiguity number calculation unit, a repetition frequency parameter variation calculation unit, a second maximum unambiguous distance recalculation unit and a second repetition frequency parameter calculation unit;
the repetition frequency parameter variation calculating unit is used for calculating the variation of the repetition frequency parameter according to the repetition frequency parameter, the distance fuzzy number and the moving speed of the coherent pulse signal;
the second maximum unambiguous distance recalculation unit is also used for recalculating the second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation;
a second repetition frequency parameter calculating unit, further configured to calculate a second pulse repetition frequency according to a second maximum unambiguous distance, the second repetition frequency parameter including: a second pulse repetition frequency and a duty cycle, wherein the second pulse repetition frequency is within a preset frequency range.
Optionally, the repetition frequency parameter variation calculating unit is specifically configured to calculate a first repetition frequency parameter variation by using a first calculation method according to the pulse repetition frequency, the distance ambiguity number, and the moving speed;
and the second maximum unambiguous distance recalculation unit is specifically used for recalculating the second maximum unambiguous distance according to the difference between the maximum unambiguous distance and the first repetition frequency parameter variation.
Optionally, the repetition frequency parameter variation calculating unit is further configured to calculate a second repetition frequency parameter variation by using a second calculation method according to the pulse repetition frequency, the distance ambiguity number, and the moving speed;
and the second maximum unambiguous distance recalculation unit is further used for recalculating the second maximum unambiguous distance according to the sum of the maximum unambiguous distance and the second repetition parameter variation.
The above-mentioned apparatus is used for executing the method provided by the foregoing embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
The above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors, or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Referring to fig. 6, a schematic diagram of a computer device according to an embodiment of the present application is shown, as shown in fig. 6, the computer device 100 includes: a processor 101, a storage medium 121 and a bus, wherein the storage medium 102 stores program instructions executable by the processor 101, when the computer device 100 runs, the processor 101 communicates with the storage medium 102 through the bus, and the processor 101 executes the program instructions to execute the method embodiment. The specific implementation and technical effects are similar, and are not described herein again.
Optionally, the present invention also provides a program product, for example a computer-readable storage medium, comprising a program which, when being executed by a processor, is adapted to carry out the above-mentioned method embodiments.
In the several embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
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 units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or in the form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (in english: processor) to execute some steps of the methods 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.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and shall be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for detecting a target with a solution to distance occlusion, the method comprising:
acquiring an echo signal received by the air defense radar based on a transmitted coherent pulse signal in a first coherent processing time, wherein the echo signal is a signal obtained by reflecting the coherent pulse signal by a target object;
judging whether the target object is in a distance occlusion area within the first coherent processing time according to the echo signal;
acquiring detection results of a ground radar for the target object, wherein the detection results comprise: a speed range of the target object, and a blur distance of the target object;
if the target object is in a distance shielding area within the first coherent processing time, recalculating a first repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the speed range and the fuzzy distance;
and continuously transmitting the coherent pulse signals according to the first repetition frequency parameter within a second coherent processing time, so that the target object is not in a distance occlusion area within the second coherent processing time.
2. The method of claim 1, wherein the re-frequency parameter comprises: the pulse repetition frequency and the duty ratio of the coherent pulse signal, the recalculating a first repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the speed range and the ambiguity distance, includes:
calculating a maximum unambiguous distance from the pulse repetition frequency;
calculating a distance fuzzy number according to the fuzzy distance and the maximum unambiguous distance;
recalculating a first maximum unambiguous distance according to the maximum unambiguous distance, the distance ambiguity number, the duty ratio and the speed range;
calculating a first pulse repetition frequency according to the first maximum unambiguous distance, wherein the first repetition frequency parameter comprises: the first pulse repetition frequency and the duty cycle.
3. The method of claim 2, wherein said recalculating a first maximum unambiguous distance as a function of the maximum unambiguous distance, the distance ambiguity number, the duty cycle, and the speed range comprises:
calculating a new distance fuzzy number according to the maximum unambiguous distance number, the distance fuzzy number and the maximum value of the speed range;
recalculating the first maximum unambiguous distance from the maximum unambiguous distance, the new distance ambiguity number, the duty cycle and the speed range.
4. The method of claim 1, wherein the method further comprises:
if the target object is not in the distance shielding area within the first coherent processing time, calculating the moving speed of the target object according to the echo signal;
recalculating a second repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal and the moving speed;
and continuously transmitting the coherent pulse signals according to the second repetition frequency parameter in a second coherent processing time, so that the target object is not in a distance occlusion area continuously in the second coherent processing time.
5. The method of claim 4, wherein the re-frequency parameter comprises: the pulse repetition frequency and the duty ratio of the coherent pulse signal, and the recalculating a second repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal and the moving speed, includes:
calculating a maximum unambiguous distance from the pulse repetition frequency;
calculating a distance ambiguity number according to an ambiguity distance and the maximum unambiguous distance, wherein the ambiguity distance is an ambiguity distance between the target object detected by a ground radar and the air defense radar;
calculating the variation of the repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the distance fuzzy number and the moving speed;
recalculating a second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation;
calculating a second pulse repetition frequency according to the second maximum unambiguous distance, wherein the second repetition frequency parameter comprises: the second pulse repetition frequency and the duty cycle, wherein the second pulse repetition frequency is within a preset frequency range.
6. The method of claim 5, wherein said calculating an amount of change in an emphasis parameter based on the emphasis parameter of the coherent pulse signal, the range ambiguity number, and the moving speed comprises:
calculating a first repetition frequency parameter variable quantity by adopting a first calculation mode according to the pulse repetition frequency, the distance fuzzy number and the moving speed;
the recalculating a second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation includes:
and recalculating the second maximum unambiguous distance according to the difference between the maximum unambiguous distance and the first repetition parameter variation.
7. The method of claim 5, wherein said calculating an amount of change in an emphasis parameter based on the emphasis parameter of the coherent pulse signal, the range ambiguity number, and the moving speed comprises:
calculating a second repetition frequency parameter variable quantity by adopting a second calculation mode according to the pulse repetition frequency, the distance fuzzy number and the moving speed;
the recalculating a second maximum unambiguous distance according to the maximum unambiguous distance and the repetition frequency parameter variation includes:
and recalculating the second maximum unambiguous distance according to the sum of the maximum unambiguous distance and the second repetition parameter variation.
8. An apparatus for detecting objects that resolves range occlusions, the apparatus comprising:
the signal acquisition module is used for acquiring an echo signal received by the air defense radar based on a transmitted coherent pulse signal in a first coherent processing time, wherein the echo signal is a signal obtained by reflecting the coherent pulse signal by a target object;
the shielding judgment module is used for judging whether the target object is in a distance shielding area within the first coherent processing time according to the echo signal;
a speed and distance obtaining module, configured to obtain a detection result of the ground radar with respect to the target object, where the detection result includes: a speed range of the target object, and a blur distance of the target object;
a repetition frequency parameter calculation module, configured to recalculate a first repetition frequency parameter according to the repetition frequency parameter of the coherent pulse signal, the speed range, and the fuzzy distance if the target object is in a distance occlusion area within the first coherent processing time;
and the pulse signal sending module is used for continuously sending the coherent pulse signals according to the first repetition frequency parameter within the second coherent processing time so as to enable the target object not to be in the distance occlusion area within the second coherent processing time.
9. A computer device, comprising: a processor, a storage medium and a bus, the storage medium storing program instructions executable by the processor, the processor and the storage medium communicating via the bus when the computer device is running, the processor executing the program instructions to perform the steps of the method for distance-masked object detection according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for distance-masked object detection according to one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211276469.9A CN115356717B (en) | 2022-10-19 | 2022-10-19 | Distance occlusion solving target detection method and device, computer equipment and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211276469.9A CN115356717B (en) | 2022-10-19 | 2022-10-19 | Distance occlusion solving target detection method and device, computer equipment and medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115356717A true CN115356717A (en) | 2022-11-18 |
| CN115356717B CN115356717B (en) | 2023-03-24 |
Family
ID=84008789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211276469.9A Active CN115356717B (en) | 2022-10-19 | 2022-10-19 | Distance occlusion solving target detection method and device, computer equipment and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115356717B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6639546B1 (en) * | 2001-11-06 | 2003-10-28 | Lockheed Martin Corporation | Radar system in which range ambiguity and range eclipsing are reduced by frequency diversity and alternation of pulse periodicity |
| JP2013113723A (en) * | 2011-11-29 | 2013-06-10 | Mitsubishi Electric Corp | Radar system |
| CN106291531A (en) * | 2016-08-04 | 2017-01-04 | 上海无线电设备研究所 | A kind of irregular tracking using Gao Zhongying Step Frequency to be combined with pulse Doppler system |
| CN106483507A (en) * | 2015-09-01 | 2017-03-08 | 南京理工大学 | A kind of method for reducing occlusion effect under Gao Zhongying pulse Doppler radar system |
| CN107144834A (en) * | 2017-05-23 | 2017-09-08 | 哈尔滨工业大学 | A kind of Gao Zhongying pulse radar extends the waveform design method of finding range |
| CN109143179A (en) * | 2018-07-26 | 2019-01-04 | 清华大学 | A kind of frequency-agile radar signal processing method and device based on change repetition technology |
| CN113791405A (en) * | 2021-09-15 | 2021-12-14 | 电子科技大学长三角研究院(衢州) | Radar ambiguity-resolving and shielding method based on orthogonal biphase coding signals |
| CN113791404A (en) * | 2021-09-15 | 2021-12-14 | 电子科技大学长三角研究院(衢州) | Radar ambiguity-resolving and shielding method based on orthogonal frequency division signals |
| CN113885006A (en) * | 2021-09-30 | 2022-01-04 | 哈尔滨工业大学 | Method for detecting coherent accumulation of maneuvering turning target |
-
2022
- 2022-10-19 CN CN202211276469.9A patent/CN115356717B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6639546B1 (en) * | 2001-11-06 | 2003-10-28 | Lockheed Martin Corporation | Radar system in which range ambiguity and range eclipsing are reduced by frequency diversity and alternation of pulse periodicity |
| JP2013113723A (en) * | 2011-11-29 | 2013-06-10 | Mitsubishi Electric Corp | Radar system |
| CN106483507A (en) * | 2015-09-01 | 2017-03-08 | 南京理工大学 | A kind of method for reducing occlusion effect under Gao Zhongying pulse Doppler radar system |
| CN106291531A (en) * | 2016-08-04 | 2017-01-04 | 上海无线电设备研究所 | A kind of irregular tracking using Gao Zhongying Step Frequency to be combined with pulse Doppler system |
| CN107144834A (en) * | 2017-05-23 | 2017-09-08 | 哈尔滨工业大学 | A kind of Gao Zhongying pulse radar extends the waveform design method of finding range |
| CN109143179A (en) * | 2018-07-26 | 2019-01-04 | 清华大学 | A kind of frequency-agile radar signal processing method and device based on change repetition technology |
| CN113791405A (en) * | 2021-09-15 | 2021-12-14 | 电子科技大学长三角研究院(衢州) | Radar ambiguity-resolving and shielding method based on orthogonal biphase coding signals |
| CN113791404A (en) * | 2021-09-15 | 2021-12-14 | 电子科技大学长三角研究院(衢州) | Radar ambiguity-resolving and shielding method based on orthogonal frequency division signals |
| CN113885006A (en) * | 2021-09-30 | 2022-01-04 | 哈尔滨工业大学 | Method for detecting coherent accumulation of maneuvering turning target |
Non-Patent Citations (4)
| Title |
|---|
| JIHONG YAN ET AL.: "An Unambiguity and Anti-Range Eclipse Method for PD Radar Using Biphase Coded Signals", 《COMPUTER MODELING IN ENGINEERING & SCIENCES》 * |
| 张威等: "抗距离遮挡的雷达相位编码信号设计方法", 《西安交通大学学报》 * |
| 苏峰等: "相位编码准连续波雷达回波遮挡问题及解决方法研究", 《兵工学报》 * |
| 项喆等: "频率分集雷达最优频率间隔选择方法", 《西安电子科技大学学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115356717B (en) | 2023-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108415010B (en) | Radar multi-target detection method based on trapezoidal LFMCW modulation | |
| US5923282A (en) | Radar system | |
| CN107843892B (en) | High-speed target Doppler velocity measurement method based on least square method | |
| US9465108B1 (en) | System and method for target doppler estimation and range bias compensation using high duty cycle linear frequency modulated signals | |
| EP1980873B1 (en) | History or image based methods for altitude determination in a radar altimeter | |
| EP3339880B1 (en) | Adaptive radar system | |
| GB2462148A (en) | Automotive FMCW radar with multiple frequency chirps | |
| CN107037432A (en) | Radar installations and its determination mesh calibration method for vehicle | |
| WO2016022255A2 (en) | Phase noise simulation model for pulse doppler radar target detection | |
| JP5656505B2 (en) | Radar equipment | |
| WO2017069680A1 (en) | Method and system for resolving range ambiguity | |
| CN114660585B (en) | Method and device for determining noise floor estimation value, electronic equipment and storage medium | |
| US7339519B2 (en) | Methods and apparatus for target radial extent determination using deconvolution | |
| CN106324589B (en) | A kind of measurement method of parameters and electronic equipment of mobile target | |
| CN105589061A (en) | Signal processing algorithm for shore-based radar | |
| CN109459731B (en) | Signal processing method and device and millimeter wave radar | |
| WO2020133223A1 (en) | Target detection method, radar, vehicle and computer-readable storage medium | |
| CN115356717B (en) | Distance occlusion solving target detection method and device, computer equipment and medium | |
| CN114137505A (en) | Target detection method and device based on wireless radar | |
| GB2558643A (en) | Method and apparatus for determining a pulse repetition interval parameter of a coded pulse-based radar | |
| KR20070016394A (en) | Method for detecting jamming for target tracking by using the detection zone data | |
| JP2725955B2 (en) | Method and apparatus for sensitivity speed control | |
| EP3486680B1 (en) | Testing system and method for testing the performance of a detector | |
| US20210215820A1 (en) | Method and system for intefrence management for digital radars | |
| US20210341606A1 (en) | System and method for calculating a binary cross-correlation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |