36 results about "Identification friend or foe" patented technology

The invention discloses a method of carrying out fusion processing on SSR navigation management and IFF multi-mode cooperation track. A clear and reliable air monitoring graph can be supported to generate and civil air and an out target monitoring and identification capability can be increased. A technical scheme is characterized by in a secondary monitoring radar SSR navigation management and identification friend or foe recognizer integration system, firstly, carrying out trace point merging and track starting on data of A, C and S general calling mode targets of an SSR navigation management mode; secondly, carrying out prediction and roll-call inquiry on an S general calling mode track so that the SSR navigation management acquires a roll-call track of the S mode; according to a target point track angle, calculating a belonging area number, carrying out relation determination on SSR navigation management target tracks in the same area and an adjacent area and generating a target track after the SSR navigation management and the IFF are fused; and then associating and fusing attributes and positions of target data under different IFF guiding modes and the target tracks of the AC and S modes of the SSR navigation management and forming an SSR navigation management and IFF fusion target track so that continuous monitoring and identification to an air target are realized.

Combined IR-RF combat identification friend-or-foe (IFF) system for a ground targets, such as dismounted soldiers, vehicles or military platforms comprising IR-RF interrogator mounted on a firearm and IR-RF transponder mounted on a friendly target. RF channel operates in Ka-band providing brief information about friendly targets that could be in attacked area, and if they are, develop alert signal: “Friendly soldiers are in the area”. The interrogator additionally contains RF channel receiving reflected signal that allows recognize armed foe. IR channel of the system prevents friendly fire in the case of direct sighting to a friendly soldier.

A surveillance system is provided for surveillance of objects within a secure area. A surveillance sensor transmits surveillance signals to all objects within the secure area, the reflections of which are received back by the surveillance sensor to determine the locations of objects, and communicates the determined locations to a pressing facility. Objects authorized to be in the secure area are equipped with an Identification Friend or Foe (IFF) unit that includes a GPS receiver and a data communication transmitter. In response to predetermined conditions, the IFF units broadcast their position and identification to the processing facility for correlation with locations defined by the reflection signals. The reflection signals from other objects are compared with a list of the locations of objects, such as terrain features and man-made facilities, that are known to be in the secure area If no broadcast information is received from an object and the location of that object determined by the reflection signal cannot be correlated with the known object list; than the object has no proper authorization to be within the secure area, and an alarm is generated.

Systems and methods relating to the use of one type of radar technology to accomplish the function of another type of radar technology. Secondary Surveillance Radar/Identification Friend or Foe (SSR/IFF) technology can be used as if it was Primary Surveillance Radar (PSR) to gain the advantages of both systems. Radar signals useful for SSR/IFF are used as PSR signals. Reflections of the SSR/IFF signal off of both airborne and ground based aircraft, and ground based vehicles and items are used to locate and identify these aircraft, vehicles and items. For SSR/IFF transponder equipped aircraft, the reflected SSR/IFF signals provide (prove dial) dual confirmation of the aircraft's presence while for non-transponder equipped aircraft, the reflected signals provide an indication of the aircraft's presence. The use of SSR/IFF signals reflected off of ground based vehicles and items provides an indication of ground based vehicles and items present around the installation receiving the reflected SSR/IFF signals.

The invention discloses an optical modulator, comprising a quantum well active layer which is made from InGaN/GaN material. Through the technology, the optical modulator disclosed by the invention can solve a problem that an infrared band is strongly absorbed under the atmosphere and water, and realizes free-space optical communication of red and green visible lights. The communication has the characteristics of good confidentiality, low power consumption and multi-point distribution and can be applied to identification friend or foe, unmanned planes, detection of oceanographic buoys, mineral prospecting and search and rescue and the like.

The invention relates to a protection system of an unmanned aerial vehicle, and relates to an automatic protection system of an unattended unmanned aerial vehicle and an operation scheme thereof. Thesystem comprises a control center, a communication module, a monitoring module, an access module and a countermeasure module, wherein after the monitoring module monitors the unmanned aerial vehicle,a signal that the unmanned aerial vehicle enters into an area is sent to the control center; and after the control center receives the signal of entrance of the unmanned aerial vehicle, the access module inquires the unmanned aerial vehicle to judge whether the unmanned aerial vehicle belongs to us or visitors, and the control center sends a command to the countermeasure module to interfere and docountermeasures. The automatic protection system of the unmanned aerial vehicle disclosed by the invention has the capacities of omnidirectional monitoring and access and countermeasure of the unmanned aerial vehicle, can realize seamless protection of 360-degree airspace, has the capacity of multiple targets, can realize monitoring and countermeasure for multiple targets simultaneously, has thecapacity of identification friend or foe, can ensure that normal operation of our unmanned aerial vehicles in a protection area, has the all-way standby working capacity, and can realize seamless protection on time domain.

The invention relates to the technical field of pulse identification, and discloses a method and a system for judging an effective relevant peak pulse sequence. The method specifically comprises the following steps of: for the pulse data received each time, respectively calculating the time interval jitter between each two pulses; calculating the time interval between each two pulses of the standard relevant peak according to the position and the tolerance range of the standard relevant peak pulse sequence; comparing and judging whether the actually received pulse is the relevant peak pulse sequence; calculating the time interval jitter between each two pulses according to the received relevant peak pulse sequence; calculating the time interval jitter between each two pulses of the obtained relevant peak pulse sequence according to the received pulse data to compare with the calculated time interval jitter between each two pulses of the actually received pulses, and judging whether the pulse is an effective relevant peak pulse. The method and the system provided by the invention are used in an identification friend or foe system, and can accurately identify the relevant peak of the message, so that the following message identification content can be more accurate, and the speed can be higher.

The invention discloses a two-dimensional radar system deviation estimation algorithm based on an earth centered earth fixed (ECEF) coordinate system, and belongs to the field of radar data processing. An ECEF coordinate conversion formula cannot be directly used because a two-dimensional radar lacks height information of a target, so error registration can only be performed in a plane; and when the distance between the target and the radar is relatively long, the accuracy of error registration can be affected because an extremely large coordinate conversion error is caused by a registration method in the plane due to the influence of earth curvature. By the algorithm, actual problems are solved. The algorithm comprises the following steps of: supposing that the height of the target measured by two radars is zero; performing error registration by using the ECEF coordinate conversion formula to obtain a primary estimation value; and correcting an estimation result by a correction algorithm. By the algorithm, the estimation accuracy of radar system deviation can be effectively improved, and the engineering is easy to implement; and the algorithm has promotion and application values, can be used for error registration of radar sensors, electric synthetic method (ESM) sensors, infrared sensors, identification friend or foe (IFF) sensors and the like and can also be applied to data processing of related fields of medicine, traffic and the like.

The invention relates to the technology of novel identification friend or foe, in particular to a multi-channel, anti-interference and anti-aliasing pulse sequence decoding method which is based on an encryption mode and used for advanced identification friend or foe. The multi-channel, efficient, anti-interference and anti-aliasing pulse sequence decoding method aims to solve the problem in the prior art, according to the position interval and tolerance range between standard pulse sequences, the obvious anti-aliasing and anti-interference effect can be achieved on the multi-path phenomenon generated in pulse sequence broadcast in a complex electromagnetic environment and malicious signal interference of foe in modern information countermeasure, the correct decoding rate is greatly improved, and safety and reliability of a system are powerfully guaranteed. Through set basic windows and actual sliding window models, all input pulse sequences and sequences of the sliding window models are compared, pulses meeting conditions are obtained, a final pulse sequence is obtained by selecting related parameters of the amplitude peak value, and the design requirement is met.

The invention discloses an IFF responder boundary test method, and aims to provide a boundary test method which is high in test efficiency and has accuracy. The method comprises the following steps that: firstly, an industrial personal computer with built-in automatic test software, a signal source connected with a switch matrix in series and a signal analyzer are connected to form an identification friend or foe (IFF) responder boundary test system which performs bidirectional communication with a responder through the switch matrix; and automatic test software controls a signal source to automatically and continuously generate various excitation signals of various widths and amplitudes through an internet access of an industrial personal computer and the switch matrix to automatically generates pulse inquiry signals of various modes, an upper antenna and a lower antenna which are connected with a responder through the switch matrix are used for carrying out boundary test on an inquiry signal pulse signal and a sidelobe suppression signal under various pulse characteristic conditions on the responder, the boundary value of the responder for receiving and processing the inquiry pulse signal is determined based on the inquiry signal pulse characteristic, and whether the response function and the sidelobe suppression function of the responder can work normally or not is judged.

The invention discloses a signal processing system for an identification friend or foe (IFF) transponder. The signal processing system is mainly composed of a photoelectric conversion part, a signal amplifying part, a filtering part, an automatic level gain control part, a single chip microcomputer and an output end overvoltage protection circuit. Firstly, a received weak optical signal is converted into an electric signal by the photoelectric conversion part, then the electrical signal obtained through conversion is input into the amplifying part of the system, the signal is amplified and then subjected to filtering treatment, the target signal is extracted and then processed through the automatic level gain control circuit, the output end overvoltage protection circuit is additionally arranged for preventing the single chip microcomputer from being burnt due to too large output end level, and finally, the signal is input into the single chip microcomputer. The signal processing system can effectively improve the IFF effectiveness of the existing combat system and reduce accidental injury rate. The signal processing system has the advantages of high accuracy, high reliability, low cost, low power consumption and the like.

The invention provides a self-adaptation identification friend or foe system based on a low-light-level night vision sighting telescope and having the early warning function. According to the individual combat characteristic, an infrared signal with the near-infrared band being 830 nm to 860 nm particularly 850 nm is used, and the self-adaptation identification friend or foe system is designed andcomprises an emission end, a response end and an observation end, the emission end is provided with a shell, a laser emitter, a control switch, a gear adjusting switch and an optical axis adjusting rotary knob, and the response end is provided with multiple signal detection windows in the different directions, a light-sensitive detector, a signal processing module and a gear adjusting rotary knob. Through decoding of a demodulation module, whether an optical axis is emitted by a friend or not is judged, if yes, a response signal lamp is subjected to response and control to be lightened or flicker according to the reserved manner, it is identified that it is the friend, and if not, response is not carried out; friend identification and foe early warning are rapidly and reliably carried out, the disturbance of the environment light to identification friend or foe is effectively avoided, and possibility of erroneous judgement of an identification friend or foe receiver is reduced.

The invention belongs to the field of processing of identification-friend-or-foe digital signals in western systems, and relates to an FPGA (field programmable gate array) data processing method and an FPGA data processing system based on novel CHSI optimization. The problems such as high error rate, low data transmission reliability and low real-time processing efficiency in the prior art are solved. The FPGA data processing method mainly includes designing a high-precision differential local oscillation clock source according the characteristics of CHSI output and input time sequence processing; generating a basic clock of the CHSI output and input time sequence processing by an internal clock phase-locked loop of an FPGA; according to a given CHSI transmission circuit and a time sequence processing optimization method, and based on time sequence characteristics, data frame structures and status switching control, processing data of CHSI input and output time sequences.

The invention relates to a friend or foe identification signal code rate calculation method based on Haar transform. The method comprises the following steps: firstly sampling an intermediate frequency signal, then intercepting a burst IFF signal in real time by employing a channelization parallel detection technology, obtaining the accurate frequency of the IFF signal through an instantaneous phase difference frequency measurement technology, and therefore, calculating the optimal multi-resolution analysis scale factor of the IFF signal; performing Haar wavelet transform on the intercepted IFF signal under the optimal multi-resolution analysis scale factor to obtain a feature vector parameter of the IFF signal in a wavelet transform domain, then performing singular point domain separation and curve fitting on the feature vector parameter, and synchronously calculating a feature value of the feature vector parameter in real time; and establishing a feature vector space of a tree structure according to the feature value, and judging and calculating the accurate code rate of the IFF signal. According to the invention, the calculation amount and the calculation error of the identification friend or foe signal code rate can be effectively reduced.

The invention relates to an airspace defense method and an air floating mine thereof. In the method, a transparent hydrogen balloon or helium balloon matched with a high-energy miniature bomb is arranged in a fortified airspace. The bomb is matched with a self-destroying device of clock control or controller control for spontaneous explosion mine removal, and is matched with an identification friend or foe system to prevent bombing error. The air floating mine comprises the transparent hydrogen balloon or helium balloon matched with the high-energy miniature bomb, and the balloon is matched with a height maintaining system. The method has the advantages of low cost and easy defense organization, can effectively block or inhibit the air power of the enemy, and is particularly suitable for a side with weak air power for defending against the invasion of an enemy with strong air power. The floating mines can be set at high density in a large scale by rockets or missiles or planes, and continuously float in a certain airspace for attacking an air target of the enemy colliding or approaching the floating mines, thus achieving the purposes of forcibly blocking or inhibiting the air power of the enemy by low cost and safeguarding the mastery of the air.

The invention discloses an M6-mode identification friend or foe equipment comprehensive test system, which comprises a comprehensive test device and an upper computer, and is characterized in that the comprehensive test device comprises a control unit, a coding and decoding unit, a data acquisition unit and a comparison detection unit, the upper computer is used for determining nationality information selected by a user and a test state and generating a test key according to the test state, the control unit is used for loading the nationality information, the test state and the test key from the upper computer, the data acquisition unit is used for sampling TTL signals of tested equipment and acquiring technical parameters of the tested equipment, and the coding and decoding unit is used for carrying out inquiry test coding or response test coding by using the test key according to the technical parameters, the test state and the nationality information of the tested equipment, generating an inquiry test coding signal or a response test coding signal, sending the inquiry test coding signal or the response test coding signal to the tested equipment, decoding the coding information to generate a decoding signal, and generating a standard signal at the same time. According to the invention, compatibility testing can be carried out on M6-mode identification friend or foe equipment of different countries.

The invention discloses an encryption and decryption algorithm testing and verification device and system for an identification friend or foe system, comprising a signal processing unit, an encryption and decryption unit and a loading management unit. The signal processing unit loads an externally input signal processing program, and the loading management unit loads the externally input encryption Decryption algorithm program and key data; the encryption and decryption unit is used to periodically generate the query signal according to the externally input query trigger signal, and encrypt to obtain the encrypted query data; the signal processing unit is used to process the encrypted query data to generate an ASK encoded signal And AM coding gate signal; Encryption and decryption unit is also used for deciphering PSV video signal to obtain response data; And the encrypted inquiry data and response data are carried out package and obtain package data; Wherein, PSV video signal is converted to response signal by outside get; the load management unit is also used to send the package data to the outside. The invention can improve the flexibility and convenience of encryption and decryption algorithm verification.