CN109270512B - Dispatching method and system for distributed coherent synthetic radar - Google Patents
Dispatching method and system for distributed coherent synthetic radar Download PDFInfo
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- CN109270512B CN109270512B CN201811290191.4A CN201811290191A CN109270512B CN 109270512 B CN109270512 B CN 109270512B CN 201811290191 A CN201811290191 A CN 201811290191A CN 109270512 B CN109270512 B CN 109270512B
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Abstract
The invention discloses a dispatching method and a dispatching system for a distributed coherent synthetic radar, and relates to the field of radars. The method comprises the following steps: calculating the threat degree of each target and the number of unit radars required for tracking each target according to the measurement information of a new target searched by the radar and a tracked old target in the x-th scheduling period; generating scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required by tracking each target; and scheduling each unit radar in the (x + 1) th scheduling period according to the scheduling information. According to the scheduling method provided by the invention, the unit radar is preferentially arranged to perform distributed coherent synthetic tracking on the target with high threat degree, so that the reasonable scheduling of the distributed coherent synthetic radar can be realized, and the multi-target tracking capability of the distributed coherent synthetic radar is ensured.
Description
Technical Field
The invention relates to the field of radars, in particular to a dispatching method and a dispatching system of a distributed coherent synthetic radar.
Background
Distributed coherent synthetic radar is the technological direction for the next generation of radar development. The signals of a plurality of unit radars are subjected to coherent synthesis to equivalently form a high-power radar. The more the number of the unit radars is, the larger the detection power and the tracking distance of the coherent synthetic radar after signal fusion are. Due to the fact that the radar cross-section area and the distance of each target are different, the number of required unit radars is different.
However, when the distributed coherent synthetic radar is applied to multi-target tracking, different numbers of unit radars need to be reasonably allocated to different tracking targets, and no good solution exists at present.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a scheduling method of a distributed coherent synthetic radar and a scheduling system of a distributed coherent synthetic radar, aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a scheduling method of a distributed coherent synthetic radar comprises the following steps:
calculating the threat degree of each target and the number of unit radars required for tracking each target according to the measurement information of a new target searched by the radar and a tracked old target in the x-th scheduling period, wherein x =1,2,3 and …;
generating scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required by tracking each target;
and scheduling each unit radar in the (x + 1) th scheduling period according to the scheduling information.
The invention has the beneficial effects that: according to the scheduling method provided by the invention, the distributed coherent synthetic tracking is carried out on the target with high threat degree through the preferentially arranging unit radar, the reasonable scheduling of the distributed coherent synthetic radar can be realized, and the multi-target tracking capability of the distributed coherent synthetic radar is ensured.
Another technical solution of the present invention for solving the above technical problems is as follows:
a scheduling system for a distributed coherent synthetic radar, comprising:
the threat degree calculation unit is used for calculating the threat degree of each target and the number of unit radars required by tracking each target according to the measurement information of the new target searched by the radars and the tracked old target in the x-th scheduling period, wherein x =1,2,3 and …;
the scheduling information calculation unit is used for generating scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required by tracking each target;
and the scheduling unit is used for scheduling each unit radar in the (x + 1) th scheduling period according to the scheduling information.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic flowchart of a scheduling method for a distributed coherent synthetic radar according to an embodiment of the present invention;
fig. 2 is a schematic diagram of scheduling allocation provided by another embodiment of the scheduling method for distributed coherent synthetic radar according to the present invention;
fig. 3 is a structural framework diagram provided by an embodiment of a scheduling system of a distributed coherent synthetic radar according to the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
As shown in fig. 1, a schematic flow chart provided in an embodiment of a scheduling method for a distributed coherent synthetic radar according to the present invention is provided, where the scheduling method includes:
s1, calculating the threat degree of each target and the number of unit radars required by tracking each target according to the measurement information of a new target searched by the radar and a tracked old target in the x-th scheduling period, wherein x =1,2,3 and ….
It should be noted that the threat level is an index that measures the detection value of an object, for example, when an object is close to the radar and the moving speed of the object flying towards the radar is fast, the threat level of the object is high. The corresponding relation between the parameters for determining the threat degree and the threat degree can be set according to actual requirements.
The parameters for determining the target threat level can be speed, distance, etc., which can be set according to actual requirements.
For example, the threat level of a speed may be 1 when the speed of the target is between a-b (km/h), 2 when the speed of the target is between b-c (km/h), and 3 when the speed of the target is between c-d (km/h); the threat level of the distance may be 3 when the distance of the target is between e and f (km), and 2 when the distance of the target is between f and g (km).
Then the threat level of the target may be 4 when the target is between a and b (km/h) and the distance is between e and f (km).
It should be understood that the above is a simplified example for ease of description only and does not represent actual values or actual algorithms that are challenging.
It should be understood that the working states of the distributed coherent synthetic radar are divided into two types, namely searching and tracking, and each target refers to a searched target and a target being tracked in the detection range of the radar.
And S2, generating scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required by tracking each target. It should be noted that the number of targets in each scheduling week may be the same or different. For example, when a new target appears, the threat degree of the new target is highest, and the number of required unit radars is less than the total number of the unit radars, the new target is tracked in the next scheduling period; for another example, after a target with a lower threat level than the target in the current scheduling period is assigned a unit radar and no unit radar is assigned, the target is abandoned in the next scheduling period.
That is, the scheduling information may not satisfy the tracking of all targets (new and old targets), and the target that cannot satisfy the tracking may be discarded.
It should be appreciated that within each scheduling period, there are multiple dwells.
The scheduling information refers to a target of a certain number tracked by a radar of a unit of a certain number in a certain dwell of a certain scheduling period.
For example, assuming there are 10 cell radars in total, 3 radars are needed for tracking target a, 5 radars are needed for tracking target B, 10 radars are needed for tracking target C, and 2 dwells are assumed, then the scheduling information may be: in the x +1 scheduling period, in the 1 st dwell, the radars track the target A by 1,2 and 3, the radars track the target B by 4, 5, 6, 7 and 8, the rest radars are used for searching, and in the 2 nd dwell, all radars track the target C.
And S3, scheduling each unit radar in the (x + 1) th scheduling period according to the scheduling information.
It should be appreciated that when x is 1, indicating that the radar system is in the 1 st scheduling period, then all radars perform the search task.
It should be understood that before the 1 st scheduling period, a step of radar parameter initialization should be included.
According to the scheduling method provided by the embodiment, the distributed coherent synthetic tracking is performed on the target with high threat degree through the preferentially arranging unit radar, so that the reasonable scheduling of the distributed coherent synthetic radar can be realized, and the multi-target tracking capability of the distributed coherent synthetic radar is ensured.
Optionally, in some embodiments, the measurement information may include: the system comprises the speed, the distance and the signal-to-noise ratio, wherein the speed is positively correlated with the threat degree, the distance is negatively correlated with the threat degree, and the signal-to-noise ratio is negatively correlated with the number of unit radars required by tracking the current target.
It should be noted that the velocity refers to a velocity of a searched or tracked target relative to the radar, and the distance refers to a distance of the searched or tracked target relative to the radar.
Optionally, in some embodiments, generating scheduling information of the (x + 1) th scheduling cycle according to the threat level of each target and the number of unit radars required for tracking each target may specifically include:
sequencing all the targets in sequence according to the sequence of the threat degrees from large to small;
all Sj = M, j is more than or equal to 1 and less than or equal to L;
starting from i =1, for the ith target, R in the first dwell of the x +1 th scheduling cycle is determined i Whether or not S is less than or equal to j ，1≤i≤N，1≤j≤L；
If so, let R i A T jk ＝i，M-S j +1≤k≤M-S j +R i And order S j ＝S j -R i Continuously judging the (i + 1) th target; if not, judging the next residence;
wherein L is the resident number in the (x + 1) th scheduling period, M is the total number of unit radars, N is the number of targets, and R i Number of unit radars required to track ith target, S j Number of unit radars not used for tracking in jth dwell, T jk And the sequence number of the target tracked by the kth unit radar in the jth dwell.
E.g. T 12 And =5, which indicates that the 2 nd unit radar tracks the target 5 in the 1 st dwell.
As shown in fig. 2, a schematic diagram of possible scheduling assignment is given, assuming that the total number of unit radars is 10, the number of residences in a scheduling period is 6, assuming that there are 8 targets, which are respectively target 1, target 2, target 3, target 4, target 5, target 6, target 7, and target 8 after being sorted from high to low according to the threat degree, assuming that the number of unit radars required by each target is respectively 9, 8, 6, 5, 9, 8, 6, and 5, then the scheduling result may be as shown in fig. 2: in the 1 st dwell, unit radars 1-9 are used for tracking a target 1, and unit radar 10 is used for searching; in the 2 nd dwell, unit radars 1 to 8 are used for tracking a target 2, and unit radars 9 and 10 are used for searching; in the 3 rd residence, unit radars 1-6 are used for tracking a target 3, and unit radars 7-10 are used for searching; in the 4 th residence, unit radars 1-5 are used for tracking a target 4, and unit radars 6-10 are used for tracking a target 8; in the 5 th dwell, unit radars 1 to 9 are used for tracking a target 5, and unit radar 10 is used for searching; in the 6 th residence, unit radars 1-8 are used for tracking a target 6, and unit radars 9 and 10 are used for searching; since a sufficient number of element radars are not used to track the target 7 after the element radars are allocated to the tracking of the targets 1 to 6, the target 7 is not tracked.
It should be understood that when the number of radars in the scheduling period is not enough to track all targets, the targets with the earlier threat degrees can be tracked preferentially, and the targets with the later threat degrees, which are qualified, are abandoned.
It should be noted that, in the 1 st scheduling period, all radars are used for searching, so all T in the scheduling period jk Is 0, all S j Is M.
It is understood that some or all of the steps described in the embodiments above may be included in some embodiments.
As shown in fig. 3, a structural framework diagram provided for an embodiment of a scheduling system of a distributed coherent synthetic radar according to the present invention includes:
the threat degree calculation unit 1 is used for calculating the threat degree of each target and the number of unit radars required by tracking each target according to the measurement information of a new target searched by the radars and a tracked old target in the x-th scheduling period, wherein x =1,2,3 and …;
the scheduling information calculation unit 2 is used for generating scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required by tracking each target;
and the scheduling unit 3 is used for scheduling each unit radar in the (x + 1) th scheduling period according to the scheduling information.
Optionally, in some embodiments, the measurement information may include: the system comprises the speed, the distance and the signal-to-noise ratio, wherein the speed is positively correlated with the threat degree, the distance is negatively correlated with the threat degree, and the signal-to-noise ratio is negatively correlated with the number of unit radars required by tracking the current target.
Optionally, in some embodiments, the scheduling information calculating unit 2 may be specifically configured to sequentially order all the targets according to the order of the threat degrees from large to small; all Sj = M, j is more than or equal to 1 and less than or equal to L; starting from i =1, for the ith target, R in the first dwell of the x +1 th scheduling cycle is determined i Whether or not it is less than or equal to S j I is more than or equal to 1 and less than or equal to N, and j is more than or equal to 1 and less than or equal to L; if so, let R i A T jk ＝i，M-S j +1≤k≤M-S j +R i And order S j ＝S j -R i Continuously judging the (i + 1) th target; if not, judging the next residence;
wherein L is the resident number in the (x + 1) th scheduling period, M is the total number of unit radars, N is the number of targets, and R i Number of unit radars required to track ith target, S j Number of unit radars not used for tracking in jth dwell, T jk And the sequence number of the target tracked by the kth unit radar in the jth dwell.
It is understood that some or all of the devices described in the embodiments above may be included in some embodiments.
It should be noted that this embodiment is a product embodiment corresponding to each of the above method embodiments, and for the description of each structural device and the optional implementation in this embodiment, reference may be made to the corresponding description in each of the above method embodiments, which is not described herein again.
The reader should understand that in the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, 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.
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 position, 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 of the present invention.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A scheduling method of a distributed coherent synthetic radar is characterized by comprising the following steps:
calculating the threat degree of each target and the number of unit radars required for tracking each target according to the measurement information of a new target searched by the radar and a tracked old target in the x-th scheduling period, wherein x =1,2,3 and …;
generating scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required by tracking each target;
scheduling each unit radar in the (x + 1) th scheduling period according to the scheduling information;
generating scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required for tracking each target, wherein the scheduling information comprises:
sequencing the threat degrees of all the targets in turn from big to small;
let all Sj = M, j is more than or equal to 1 and less than or equal to L;
starting from i =1, for the ith target, R in the first dwell of the x +1 th scheduling cycle is determined i Whether or not S is less than or equal to j ，1≤i≤N，1≤j≤L；
If so, let R i A T jk ＝i，M-S j +1≤k≤M-S j +R i And order S j ＝S j -R i Continuously judging the (i + 1) th target; if not, judging the next residence;
wherein L is the resident number in the (x + 1) th scheduling period, M is the total number of unit radars, N is the number of targets, R i Number of unit radars required to track ith target, S j Number of unit radars not used for tracking in jth dwell, T jk And the serial number of the target tracked by the kth unit radar in the jth dwell.
2. The scheduling method of claim 1, wherein the measurement information comprises: the radar target tracking system comprises speed, distance and a signal-to-noise ratio, wherein the speed is positively correlated with threat degree, the distance is negatively correlated with threat degree, and the signal-to-noise ratio is negatively correlated with the number of unit radars required by tracking the current target.
3. A dispatch system for a distributed coherent synthetic radar, comprising:
the threat degree calculation unit is used for calculating the threat degree of each target and the number of unit radars required by tracking each target according to the measurement information of the new target searched by the radars and the tracked old target in the x-th scheduling period, wherein x =1,2,3 and …;
the scheduling information calculation unit is used for generating scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required by tracking each target;
the scheduling unit is used for scheduling each unit radar in the (x + 1) th scheduling period according to the scheduling information;
the scheduling information calculating unit is further configured to:
generating the scheduling information of the (x + 1) th scheduling period according to the threat degree of each target and the number of unit radars required for tracking each target, wherein the scheduling information comprises:
sequencing the threat degrees of all targets in turn from large to small;
let all Sj = M, j is more than or equal to 1 and less than or equal to L;
starting from i =1, for the ith target, R in the first dwell of the x +1 th scheduling cycle is determined i Whether or not S is less than or equal to j ，1≤i≤N，1≤j≤L；
If so, let R i A T jk ＝i，M-S j +1≤k≤M-S j +R i And order S j ＝S j -R i Continuously judging the (i + 1) th target; if not, judging the next residence;
wherein L is the resident number in the (x + 1) th scheduling period, M is the total number of unit radars, N is the number of targets, R i Number of unit radars required to track ith target, S j Number of unit radars not used for tracking in jth dwell, T jk And the sequence number of the target tracked by the kth unit radar in the jth dwell.
4. The scheduling system of claim 3 wherein the measurement information comprises: the radar target tracking system comprises speed, distance and a signal-to-noise ratio, wherein the speed is positively correlated with threat degree, the distance is negatively correlated with threat degree, and the signal-to-noise ratio is negatively correlated with the number of unit radars required by tracking the current target.
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