CN115047445A - Random response delay-based friend-foe identification de-interleaving method and system - Google Patents
Random response delay-based friend-foe identification de-interleaving method and system Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- 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
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
- G01S13/785—Distance Measuring Equipment [DME] systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- 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
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
- G01S13/785—Distance Measuring Equipment [DME] systems
- G01S13/788—Coders or decoders therefor; Special detection circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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Abstract
The invention discloses a method and a system for identifying and de-interleaving friend or foe based on random response delay.A random response delay field is added into response information on one side of a responder, and the response information containing the random response delay field is coded and encrypted; delaying the coded and encrypted response information according to the value of the random response delay field and then sending the response information to one side of a detector; at one side of the detecting party, receiving response information sent by the answering party, and decrypting and decoding the response information; extracting effective response fields and random response delay fields from the decrypted and decoded response information; and positioning the response target according to the obtained effective response field and the random response delay field and determining the distance of the response target. Even if the distances of all the response targets relative to the detecting party are completely the same and the responses are simultaneously corresponding, the response information received by the detecting party can be ensured not to be interlaced and overlapped, so that the detecting party can accurately decode the response information of all the targets.
Description
Technical Field
The invention relates to the technical field of signal coding and decoding, in particular to a random response delay-based friend or foe identification de-interleaving method and system.
Background
The method that the detecting party transmits an inquiry radio frequency signal towards the target, the target receives the inquiry radio frequency signal and then transmits a response radio frequency signal to the detecting party is generally called as a secondary radar. The friend-friend identification system is characterized in that the friend-friend identification system is used for positioning a friend target and confirming the friend or friend by a detection party by adding friend-friend identification information into question-answer information by utilizing a secondary radar principle. However, when the distances between a plurality of friend targets and the detecting party are close (less than or equal to 3 km) and the directions are close (less than or equal to 3 °), the plurality of friend targets can almost simultaneously respond to the inquiry of the detecting party and respond, so that the responding radio frequency signals of multiple parties can be superposed together to form interweaving, which causes that the detecting party cannot correctly extract the identification information answered by each friend target, and finally causes identification failure.
With the increasing number of military aircrafts in each country, the probability of interweaving during identification of enemies is greatly improved. However, the existing codec technology cannot correctly identify the target information from the interleaved reply rf signal.
In view of this, the present application is specifically made.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing coding and decoding technology cannot correctly identify target information from interleaved response radio frequency signals, and aims to provide a random response delay-based friend or foe identification de-interleaving method and system, which can avoid interleaving of response signals transmitted by a plurality of response targets at the same time, ensure that a detector can accurately identify target response information, and analyze the distance of the target relative to the detector.
The invention is realized by the following technical scheme:
on the one hand, the method comprises the following steps of,
the application provides a random response delay-based friend or foe identification de-interleaving method, which comprises the following steps:
on one side of the responder, adding a random response delay field into the response message, and coding and encrypting the response message containing the random response delay field; delaying the coded and encrypted response information according to the value of the random response delay field and then sending the response information to one side of a detector;
at one side of the detecting party, receiving response information sent by the answering party, and decrypting and decoding the response information; extracting effective response fields and random response delay fields from the decrypted and decoded response information; and positioning the response target according to the obtained effective response field and the random response delay field and determining the distance of the response target.
Further, in the above-mentioned case,
the responder side comprises a plurality of responder targets; the lengths of the random response delay fields added to the response messages of the respective response targets are different from each other.
Further, in the above-mentioned case,
the step of determining the distance of the response target comprises the following steps:
determining the sending time of the inquiry information and the receiving time of the response information;
calculating the time difference between the sending time of the inquiry information and the receiving time of the response information;
and acquiring the distance of the response target according to the time difference.
Further, in the above-mentioned case,
the step of determining the distance of the response target comprises the following steps:
establishing a target distance calculation model;
obtaining model parameters, wherein the model parameters comprise: the time difference between the time when the detecting party sends the inquiry information to each response target and the time when the response information fed back by each response target is received, and the response delay time of each response target;
and calculating the distance of the response target according to the target distance calculation model and the model parameters.
Further, in the above-mentioned case,
the target distance calculation model is as follows:
(ii) a Wherein T represents the time length of the inquiry signal from the probe side reaching the response target 1 or the response target 2, and T1 represents the time when the probe side sends the inquiry information to the response target 1 and the received responseA time difference between the time when the response information is fed back by the target 1, T2 represents a time difference between the time when the inquiry information is sent out by the response target 2 in the detection direction and the time when the response information is fed back by the response target 2, a represents a response delay time period of the response target 1, B represents a response delay time period of the response target 2, D represents a distance of the detecting party from the response target 1 or the response target 2, and C represents a light speed.
On the other hand, in the case of a liquid,
the application provides a friend or foe identification de-interleaving system based on random response delay, which comprises:
the response signal processing terminal is used for adding a random response delay field into the response information and coding and encrypting the response information containing the random response delay field; delaying the coded and encrypted response information according to the value of the random response delay field and then sending the response information to an inquiry signal processing end;
the inquiry signal processing end is used for receiving the response information sent by the response signal processing end, and decrypting and decoding the response information; extracting effective response fields and random response delay fields from the decrypted and decoded response information; and positioning the response target according to the obtained effective response field and the random response delay field and determining the distance of the response target.
Further, in the above-mentioned case,
the response signal processing end comprises a plurality of response processors;
the response processor includes:
the delay information adding module is used for adding a random response delay field into the response information;
the coding and encrypting module is used for coding and encrypting the response information containing the random response delay field;
the delay processing module is used for delaying the coded and encrypted response information according to the value of the random response delay field;
the response information sending module is used for sending the delayed response information to the inquiry signal processing end;
the length of the added random response delay field in each response processor is different.
Further, in the above-mentioned case,
the interrogation signal processing terminal includes:
the response information receiving module is used for receiving response information sent by the response signal processing terminal;
the decryption and decoding module is used for decrypting and decoding the response information;
the information extraction module is used for extracting an effective response field and a random response delay field from the decrypted and decoded response information;
the response target positioning module is used for positioning the response target according to the obtained effective response field and the random response delay field;
and the response target ranging module is used for determining the distance of the response target according to the obtained effective response field and the random response delay field.
Further, in the above-mentioned case,
the response target ranging module includes:
the model building unit is used for building a target distance calculation model;
a parameter obtaining unit, configured to obtain model parameters, where the model parameters include: the time difference between the time when the detecting party sends the inquiry information to each response target and the time when the response information fed back by each response target is received, and the response delay time of each response target;
and the model calculation unit is used for extracting model parameters from the parameter acquisition unit and substituting the extracted model parameters into the target distance calculation model for calculation to obtain the distance of the response target.
Further, in the above-mentioned case,
the parameter acquisition unit includes:
the timer is used for recording the time difference between the time when the detecting party sends the inquiry information to each response target and the time when the response information fed back by each response target is received;
and the response delay extraction subunit is used for extracting the response delay time of each response target from the decryption and decoding module.
Compared with the prior art, the invention has the following advantages and beneficial effects: random response delay fields with different lengths are randomly added into response information of each response target, so that the response targets delay the coded and encrypted response information according to respective response delay information and then send the response information to a detecting party, and even if the distances of the response targets relative to the detecting party are completely the same and responses are simultaneously made correspondingly, the response information received by the detecting party can be ensured not to be interwoven and overlapped, and then the detecting party can accurately decode the response information of each target and obtain the response information.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for a person skilled in the art, other related drawings may also be obtained from these drawings without inventive effort.
Fig. 1 is a diagram of a MA response coding waveform provided in embodiment 1 of the present invention;
fig. 2 is a waveform diagram of a single MA response message provided in embodiment 1 of the present invention;
fig. 3 is a waveform diagram of superposition and interleaving of two MA response messages provided in embodiment 1 of the present invention;
fig. 4 is a waveform diagram of response codes satisfying a civil aviation air traffic control secondary radar system according to embodiment 1 of the present invention;
fig. 5 is a self-defined friend or foe identification response information diagram provided in embodiment 1 of the present invention;
fig. 6 is a flow chart of processing customized friend or foe identification response information provided in embodiment 1 of the present invention;
FIG. 7 is a timing diagram of a customized friend or foe identification response transmission provided in embodiment 1 of the present invention;
fig. 8 is a timing diagram of a customized friend or foe identification inquiry response provided in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1, the current civil MA response code consists of two frame pulses (F1 and F2) and 12 information pulses (a 1, a2, a4, B1, B2, B4, C1, C2, C4, D1, D2 and D4); the width of all the response encoding pulses is 0.45us + -0.1 us, and the interval between all the adjacent pulses is 1.45 mus + -0.1 us.
Without interleaving, a single MA acknowledgement information waveform is shown in fig. 2. And decoding the received response signal in real time by a secondary radar detection party, and when the received response signal meets the requirements that the pulse width is 0.45 +/-0.1 mus, the pulse interval between F1-F2 is 20.3 mus +/-0.1 mus, and the difference of the pulse amplitude is less than or equal to 1dB, determining that an effective M2 response signal is received, and extracting an information code between F1 pulses and F2 pulses immediately. The decoding rule of 12 information pulses is 4 groups of codes, and each group of codes consists of 3-bit BCD codes. For example: when a1=1, a2=0, and a4=0, the final decoding result of the a code is the a code = 1; when B1=1, B2=1, and B4=0, the final decoding result of the B code is B code = 3; when C1=0, C2=0, and C4=1, the final decoding result of the C code is C code = 4; when D1=0, D2=1, and D4=1, the final decoding result of the D code is D code =6, and therefore the final decoding result of the MA code is: 1346.
the information interleaving condition of two target responses is shown in fig. 3, if the phases of two targets are close, the amplitude of the overlapped effective information pulse is obviously increased; if the two targets are close to 180 deg. out of phase, this results in a significant reduction in the amplitude of the coincident valid information pulse. Both of these conditions result in significant non-uniformity in the amplitude of the pulses of valid information. During decoding, a group of F1 and F2 with pulse amplitude difference less than or equal to 1dB cannot be found, so that information extraction cannot be carried out. Even if the decoding requirement is relaxed, since the valid information pulse of the target 2 coincides with the valid information pulse of the target 1 (for example, the C1 pulse of the target 2 coincides with the C2 pulse of the target 1), an erroneous decoding result is inevitably obtained when the information code is extracted.
In practical situations, because some detecting antennas have wide beam widths (30-40 °), and some detecting targets are very concentrated (such as airport directions), so that 3-fold, 4-fold or even more multiple interleaving situations occur between targets and detecting antennas, and the interleaving situations between every two targets are different, it is difficult or even impossible to correctly decode in such situations by means of the existing decoding method.
Aiming at the situation that the target information cannot be correctly identified from the interleaved response radio frequency signals by the existing coding and decoding technology, the embodiment provides a random response delay-based friend or foe identification de-interleaving method, which can avoid interleaving of response signals simultaneously transmitted by a plurality of response targets, ensure that a detector can accurately identify the target response information, and analyze the distance between the target and the detector. The method is implemented as follows:
step 1: on the responder side, a random response delay field is added to the response message.
Although the friend or foe identification system is based on the secondary radar principle, the specific response information for friend or foe identification can be custom-designed in each country and is not limited by the civil aviation air traffic control secondary radar response coding rule. As shown in FIG. 4, a response code satisfying the civil aviation air traffic control secondary radar system has strict requirements on pulse width, pulse interval and specific meaning of each information pulse. And due to the strict uniform requirement, all civil aircrafts can be ensured to be correctly detected and positioned by air traffic secondary radars in different countries. However, as shown in fig. 5, the enemy-to-me identification response information defined in this embodiment includes, in addition to the specific information of the conventional enemy-to-me identification response, a random response delay value of the enemy-to-me identification response, and the added random response delay field causes each target to wait for different time for delayed response according to different random response delay values, thereby fundamentally avoiding the possibility of response interleaving.
Step 2: and encoding and encrypting the response information containing the random response delay field.
The flow of encryption and encoding of the friend or foe identification response information is shown in fig. 6. Due to the randomness of the random response delay values, the random response delay values used each time a certain target response is encoded are random. Even if the distances of a plurality of objects with respect to the probe are completely the same, the random response delay values used for each object are different when the response codes are simultaneously encoded in response to the probe's inquiry. It should be noted that, in this embodiment, the response information including the random response delay field is encoded and encrypted by using the existing encoding and encryption technology, and the specific implementation manner of the encoding and encryption is not described herein again.
And step 3: and delaying the coded and encrypted response information according to the value of the random response delay field and then sending the response information to the side of the detector.
As shown in fig. 7, since the target 1 and the target 2 adopt different random response delay values, the target 1 and the target 2 wait different times to transmit response codes when simultaneously responding to the same friend or foe identification inquiry. The target 1 and the target 2 should interleave the superposed response codes, and the respective response delay waiting time is different, and finally the response codes are staggered.
And 4, step 4: and at the side of the detecting party, receiving the response information sent by the responding party, and decrypting and decoding the response information.
As shown in fig. 8, the interleaved reply codes of the target 1 and the target 2 are staggered due to different reply latency times, so that the probe can easily decode the received reply codes.
And 5: and extracting a valid response field and a random response delay field from the decrypted and decoded response information.
Step 6: and positioning the response target according to the obtained effective response field and the random response delay field and determining the distance of the response target.
Specifically, the step of determining the distance of the response target comprises the following steps:
step 6.1: and determining the time when the detecting party sends out the inquiry information to each response target and the time when the response information fed back by each response target is received.
Step 6.2: the time difference between the transmission time of each inquiry message and the reception time of the response message is calculated.
Step 6.3: and establishing a target distance calculation model.
Step 6.4: and extracting the response delay time of each response target from the decoded response information.
Step 6.5: and substituting each time difference and the response delay time of each response target into the target distance calculation model to calculate the distance of the response target relative to the detector.
The target distance calculation model is as follows:
It should be added that the detecting party calculates the distance to the responding target according to the time difference between the time when the inquiry signal is sent and the time when the response signal is received. Assume that the time difference between the time when the probe side inquiry signal is issued and the time when the target 1 response signal is received is T1, and the time difference between the time when the probe side inquiry signal is issued and the time when the target 2 response signal is received is T2. From the friend identification inquiry response timing shown in fig. 8, T1=2T + a, i.e., T = (T1-a)/2; t2=2T + B, i.e., T = (T2-B)/2. For the values of T1 and T2, the detector can calculate the time difference between the time when the interrogation signal is sent and the time when the target response signal is received. The detector can decode and decrypt, and then extract the random response delay values of the object 1 and the object 2 respectively, thereby obtaining the values of A and B. Through the obtained values of T1, T2, A and B, the final detector can calculate the real response distance delay time T of the target 1 and the target 2. And finally, multiplying the delay time T by the light speed to obtain the distance of the target relative to the detection party.
According to the random response delay-based friend or foe identification de-interleaving method provided by the embodiment, when the distances of a plurality of response targets relative to a probe party are close (less than or equal to 3 km) and the directions are close (less than or equal to 3 degrees), the response targets can wait for different time to delay responses according to different random response delay values, and the possibility of response interleaving is fundamentally avoided. Because the response information is not interleaved, the detection party can easily confirm the friend or foe attribute of the target. Because the response information contains the response random delay value, the detecting party can obtain the distance between the target and the detecting party through simple calculation.
Example 2
Corresponding to embodiment 1, this embodiment provides a friend or foe identification deinterleaving system based on random response delay, including:
the response signal processing end is used for adding a random response delay field into the response information and coding and encrypting the response information containing the random response delay field; delaying the coded and encrypted response information according to the value of the random response delay field and then sending the response information to an inquiry signal processing end;
the inquiry signal processing end is used for receiving the response information sent by the response signal processing end, and decrypting and decoding the response information; extracting effective response fields and random response delay fields from the decrypted and decoded response information; and positioning the response target according to the obtained effective response field and the random response delay field and determining the distance of the response target.
Wherein the content of the first and second substances,
the response signal processing end comprises a plurality of response processors;
the response processor includes:
the delay information adding module is used for adding a random response delay field into the response information;
the coding and encrypting module is used for coding and encrypting the response information containing the random response delay field;
the delay processing module is used for delaying the coded and encrypted response information according to the value of the random response delay field;
the response information sending module is used for sending the delayed response information to the inquiry signal processing end;
the length of the added random response delay field in each response processor is different.
Further, in the above-mentioned case,
the interrogation signal processing terminal includes:
the response information receiving module is used for receiving response information sent by the response signal processing terminal;
the decryption and decoding module is used for decrypting and decoding the response information;
the information extraction module is used for extracting an effective response field and a random response delay field from the decrypted and decoded response information;
the response target positioning module is used for positioning the response target according to the obtained effective response field and the random response delay field;
and the response target ranging module is used for determining the distance of the response target according to the obtained effective response field and the random response delay field.
Further, in the above-mentioned case,
the response target ranging module includes:
the model building unit is used for building a target distance calculation model;
a parameter obtaining unit, configured to obtain model parameters, where the model parameters include: the time difference between the time when the detecting party sends the inquiry information to each response target and the time when the response information fed back by each response target is received, and the response delay time of each response target;
and the model calculation unit is used for extracting model parameters from the parameter acquisition unit and substituting the extracted model parameters into the target distance calculation model for calculation to obtain the distance of the response target.
Further, in the above-mentioned case,
the parameter acquisition unit includes:
the timer is used for recording the time difference between the time when the detecting party sends the inquiry information to each response target and the time when the response information fed back by each response target is received;
and the response delay extraction subunit is used for extracting the response delay time of each response target from the decryption and decoding module.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for identifying friend or foe and de-interleaving based on random response delay is characterized by comprising the following steps:
on one side of the responder, adding a random response delay field into the response message, and coding and encrypting the response message containing the random response delay field; delaying the coded and encrypted response information according to the value of the random response delay field and then sending the response information to one side of a detector;
at one side of the detecting party, receiving response information sent by the answering party, and decrypting and decoding the response information; extracting effective response fields and random response delay fields from the decrypted and decoded response information; and positioning the response target according to the obtained effective response field and the random response delay field and determining the distance of the response target.
2. The method of claim 1, wherein the responder side comprises a plurality of response targets; the lengths of the random response delay fields added to the response messages of the respective response targets are different from each other.
3. The method of claim 2, wherein the determining the distance of the response target comprises the following steps:
determining the sending time of the inquiry information and the receiving time of the response information;
calculating the time difference between the sending time of the inquiry information and the receiving time of the response information;
and acquiring the distance of the response target according to the time difference.
4. The method of claim 2, wherein the determining the distance of the response target comprises the following steps:
establishing a target distance calculation model;
obtaining model parameters, wherein the model parameters comprise: the time difference between the time when the detecting party sends the inquiry information to each response target and the time when the response information fed back by each response target is received, and the response delay time of each response target;
and calculating the distance of the response target according to the target distance calculation model and the model parameters.
5. The friend/foe identification de-interleaving method based on random response delay as claimed in claim 4, wherein said target distance calculation model is:
(ii) a Wherein T represents a time period for which an inquiry signal sent by the probe arrives at the response target 1 or the response target 2, T1 represents a time difference between a time for which inquiry information is sent from the response target 1 in the probe direction and a time for which response information fed back from the response target 1 is received, T2 represents a time difference between a time for which inquiry information is sent from the response target 2 in the probe direction and a time for which response information fed back from the response target 2 is received, A represents a response delay time period of the response target 1, B represents a response delay time period of the response target 2, and D represents a time period for which the probe departs from the response target 1 or the response target 2The distance of the object 2, C, represents the speed of light.
6. A random response delay based friend or foe identification deinterleaving system, comprising:
the response signal processing terminal is used for adding a random response delay field into the response information and coding and encrypting the response information containing the random response delay field; delaying the coded and encrypted response information according to the value of the random response delay field and then sending the response information to an inquiry signal processing end;
the inquiry signal processing end is used for receiving the response information sent by the response signal processing end, and decrypting and decoding the response information; extracting effective response fields and random response delay fields from the decrypted and decoded response information; and positioning the response target according to the obtained effective response field and the random response delay field and determining the distance of the response target.
7. A random response delay based friend or foe identification de-interleaving system according to claim 6,
the response signal processing end comprises a plurality of response processors;
the response processor includes:
the delay information adding module is used for adding a random response delay field into the response information;
the coding and encrypting module is used for coding and encrypting the response information containing the random response delay field;
the delay processing module is used for delaying the coded and encrypted response information according to the value of the random response delay field;
the response information sending module is used for sending the delayed response information to the inquiry signal processing end;
the length of the added random response delay field in each response processor is different.
8. The system according to claim 7, wherein the inquiry signal processing end comprises:
the response information receiving module is used for receiving response information sent by the response signal processing terminal;
the decryption and decoding module is used for decrypting and decoding the response information;
the information extraction module is used for extracting an effective response field and a random response delay field from the decrypted and decoded response information;
the response target positioning module is used for positioning the response target according to the obtained effective response field and the random response delay field;
and the response target ranging module is used for determining the distance of the response target according to the obtained effective response field and the random response delay field.
9. The random response delay based friend or foe identification deinterleaving system as claimed in claim 8, wherein said response target ranging module comprises:
the model building unit is used for building a target distance calculation model;
a parameter obtaining unit, configured to obtain model parameters, where the model parameters include: the time difference between the time when the detecting party sends the inquiry information to each response target and the time when the response information fed back by each response target is received, and the response delay time of each response target;
and the model calculation unit is used for extracting model parameters from the parameter acquisition unit and substituting the extracted model parameters into the target distance calculation model for calculation to obtain the distance of the response target.
10. The system according to claim 9, wherein the parameter obtaining unit comprises:
the timer is used for recording the time difference between the time when the detecting party sends the inquiry information to each response target and the time when the response information fed back by each response target is received;
and the response delay extraction subunit is used for extracting the response delay time of each response target from the decryption and decoding module.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459877A (en) * | 2022-11-09 | 2022-12-09 | 四川九洲空管科技有限责任公司 | Anti-deception jamming method based on checking inquiry |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364780A (en) * | 2013-07-29 | 2013-10-23 | 四川九洲空管科技有限责任公司 | Onboard inquiring and responding integrated equipment for secondary radar |
| CN106679694A (en) * | 2015-12-20 | 2017-05-17 | 中国电子科技集团公司第二十研究所 | TACAN beacon simulator air-to-air response delayed measurement precision calibration apparatus and method |
| CN106707252A (en) * | 2015-12-20 | 2017-05-24 | 中国电子科技集团公司第二十研究所 | Device and method for calibrating ranging accuracy of precise ranging simulator |
| CN108120964A (en) * | 2017-11-22 | 2018-06-05 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method that dynamic test secondary radar the machine delay data improves range accuracy |
| CN112468180A (en) * | 2020-11-12 | 2021-03-09 | 四川九洲空管科技有限责任公司 | Anti-interference response method applied to friend or foe identification system |
| CN113050052A (en) * | 2021-03-08 | 2021-06-29 | 四川九洲空管科技有限责任公司 | Multi-target response simulation method for friend or foe identification system |
-
2022
- 2022-08-17 CN CN202210983817.XA patent/CN115047445A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364780A (en) * | 2013-07-29 | 2013-10-23 | 四川九洲空管科技有限责任公司 | Onboard inquiring and responding integrated equipment for secondary radar |
| CN106679694A (en) * | 2015-12-20 | 2017-05-17 | 中国电子科技集团公司第二十研究所 | TACAN beacon simulator air-to-air response delayed measurement precision calibration apparatus and method |
| CN106707252A (en) * | 2015-12-20 | 2017-05-24 | 中国电子科技集团公司第二十研究所 | Device and method for calibrating ranging accuracy of precise ranging simulator |
| CN108120964A (en) * | 2017-11-22 | 2018-06-05 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method that dynamic test secondary radar the machine delay data improves range accuracy |
| CN112468180A (en) * | 2020-11-12 | 2021-03-09 | 四川九洲空管科技有限责任公司 | Anti-interference response method applied to friend or foe identification system |
| CN113050052A (en) * | 2021-03-08 | 2021-06-29 | 四川九洲空管科技有限责任公司 | Multi-target response simulation method for friend or foe identification system |
Non-Patent Citations (1)
| Title |
|---|
| 沈泽江: "《无线电导航》", 30 October 2017 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459877A (en) * | 2022-11-09 | 2022-12-09 | 四川九洲空管科技有限责任公司 | Anti-deception jamming method based on checking inquiry |
| CN115459877B (en) * | 2022-11-09 | 2023-02-03 | 四川九洲空管科技有限责任公司 | Anti-deception jamming method based on checking inquiry |
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