45 results about "Radar transmitter" patented technology

This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for bistatic radar assistance sensing. A radar-receiver receives (210), from a radar-transmitter, a configuration message that configures the radar-receiver to assist the radar-transmitter with bistatic radar sensing. The radar-receiver receives (214) a reflection of the radar signal. Responsive to the receiving the reflection of the radar signal, the radar-receiver transmits (218), to the radar-transmitter, a radar measurement report message. The radar-receiver receives (202), from the radar-transmitter, a radar capability enquiry. The radar-eceiver transmits (204), to the radar-transmitter in response to the radar capability enquiry, a radar capability response that indicates radar capabilities supported by the radar-receiver for the bistatic radar sensing.

The invention relates to a radar system (100) and a method for operating a radar system (100). Furthermore, the invention relates to a radar transmitter (50), a radar receiver (70), and a central unit (10) of such a radar system (100). In addition, the invention relates to a method for operating a radar transmitter (50), a method for operating a radar receiver (70), and a method for operating a central unit (10). The generated radar ramp signal is designed to have a multitude of orthogonal carrier frequencies. This advantageously enables continuous, interference-free operation with high measurement quality, even if individual frequency ranges are affected by interference.

A gunshot detection system includes a housing, a radar transmitter connected to the housing, a plurality of radar antennas connected to the housing, and a controller connected to the housing. The controller is operatively connected to the radar transmitter to cause the radar transmitter to generate radar transmission signals. The controller is configured to receive and record reflection data from the plurality of radar antennas. The controller is configured to determine a gunshot origination location of each bullet moving through a detection zone based on the reflection data.

Systems and methods are described, and one system includes a three-dimensional (3D) geometric tracker connected to a multiband (MB) inverse synthetic aperture array radar (ISAR), and a classification / alarm logic. The MB ISAR includes spatially distributed radar transmitters (TXs) and receivers (RXs), a TX / RX allocation logic, and a tomographic (TM) image logic. The TX / RX allocation logic is configured to receive 3D tracking data from the 3D geometric tracker, indicating subject 3D position and 3D orientation and, in response, dynamically allocate TXs and RXs to maintain MB illumination of and maintain MB reception of multiple scatter angles from subjects. The TM image processor is configured to construct TM images from the scatter angles, using 3D tracking data, for input to the classification and alarm logic. Optionally, the TX / RX resource allocation logic is configured to receive situation feedback data, for feedback adjusting of allocation of TXs and RXs.

A first radar transmitter capable of transmitting a pulse-modulated radar signal to a target, a second radar transmitter capable of transmitting a radar signal to the target, a radar receiver capable of simultaneously receiving a radar signal transmitted by the first radar transmitter and reflected by the target and a radar signal transmitted by the second radar transmitter and reflected by the target, and a signal control unit to control one or more of a carrier frequency, a pulse recurrence frequency, and a duty ratio of a pulse-modulated radar signal, and a carrier frequency of a non-pulse-modulated radar signal with respect to the first radar transmitter or the first radar transmitter and the second radar transmitter are provided.

The artificial intelligence (AI) drone shooting device according to the present invention comprises: a drone aircraft (100) equipped with a radar that identifies and tracks a target; and a shooting control device (200) attached to the lower part of the drone to control automatic shooting. The drone aircraft (100) includes a GPS antenna unit (110) for determining the current location of the drone; a radar transceiver unit (120) for detecting elevation, azimuth, and distance values ​​of a target object; and a communication antenna unit (130) capable of communicating with a remote control unit. The radar transceiver unit (120) is installed on the drone aircraft in a vertical structure with a radar transmitter (Tx) and a receiver (Rx) to facilitate target detection and tracking even when the tracked target rapidly ascends or descends. The fire control device (200) includes a camera unit (210) composed of an optical (EO) camera, a TOD camera, and a laser rangefinder (LRF) to capture images of the target object; and a firing device (220) including a gun support and a firing device.

In MIMO radar systems using the FM-ICW system, interference occurs in the beat signal due to cross-correlation components when the target is at close range. [Solution] The radar transmitter 200 is a transmitting signal that repeats a transmitting chirp signal consisting of multiple pulses having a transmission interval and whose frequency changes over time, and applies one of several classified phase change amounts with respect to the distance to the target to each of the multiple pulses in the transmitting chirp signal, and outputs with a time shift amount; and the radar receiver 300 receives a receiving signal that repeats a receiving chirp signal consisting of multiple pulses of the transmitting chirp signal of the transmitting signal received from multiple receiving antennas 12 that receive the received wave that has been reflected off the target from the transmitted wave from multiple transmitting antennas 11, and generates a beat signal having a frequency that is the difference between the frequencies of the corresponding pulses of the transmitting chirp signal and the pulses of the receiving chirp signal, thereby obtaining distance information to the target.

A radar system has a plurality of radar transmitters and at least one radar receiver, each radar transmitter having a transmitter adjuster for tuning the output of the respective transmitter, for example tuning the phase of each of a plurality of constellation points of a constellation. The radar system may operate in a calibration cycle by transmitting from a single radar transmitter using the transmitter adjuster, obtaining an estimate of the error in the transmitter adjuster and adjusting the transmitter adjuster according to the estimate of the error. In an operation cycle the radar system may transmit using the plurality of radar transmitters, the signal being transmitter from each radar transmitter being tuned using the transmitter adjuster. Calibration cycles are interspersed between operation cycles during operation.

The application discloses a high-frequency radar transmitting device and a transmitting control method thereof, and belongs to the technical field of radar transmitters. The high-frequency radar transmitting device comprises a shell and a first transmitter installed in the shell. The first transmitter is used for amplifying input signals. The first transmitter is provided with an acquisition unit, a control unit and an execution unit. The acquisition unit is used for acquiring at least one parameter in power supply voltage, bias voltage, total current, output voltage standing wave ratio and temperature of the first transmitter. The control unit can compare the acquired parameters with corresponding preset ranges. If the value of a certain parameter exceeds the corresponding preset range, the control unit sends a shutdown instruction to the execution unit. The execution unit can shut down the first transmitter according to the received shutdown instruction, and restart the first transmitter according to the received restart instruction after a set time length. The high-frequency radar transmitting device has high automation degree, and ensures the stability and continuity of the high-frequency radar transmitting device.

The utility model discloses a radar ranging auxiliary device belongs to the shaft ranging technical field, solved the safety risk and the problem of inaccuracy of measurement of original surveying shaft method, the utility model discloses a base disc bottom stand column upper end is connected with the vertical section rotation of surveying pipe, is equipped with the steel wire rope winch on the surveying pipe, is equipped with the first surveying cross bar in the surveying pipe straight section, the upper side of surveying pipe is equipped with pulley device respectively, and the steel wire rope winch is connected with the first surveying cross bar through the pulley device of steel wire rope passing through the upper side of surveying pipe, and the first surveying cross bar end is equipped with radar fixing device, and the bottom of radar fixing device is equipped with the surveying radar transmitter, and the distribution box is equipped on the base stand column, and the distribution box is connected with the surveying radar transmitter electricity through the pulley device of cable passing through the lower side of surveying pipe, and the distribution box is equipped with data receiving display. The utility model improves the measurement speed and accuracy, solves the safety problem of original surveying device use process, and improves the operation efficiency.

The application discloses a radar communication integrated design method and device based on power domain multiplexing, which comprises the following steps: superimposing a radar signal and a communication signal in a time-frequency domain to serve as a radar communication integrated signal; processing the radar signal of the radar communication integrated signal received by a communication receiving end through a time delay frequency difference estimation algorithm, removing the estimated radar signal, separating out the communication signal, and demodulating the communication signal; and directly taking the radar communication integrated signal received by a radar receiving end as a radar signal to perform target detection, so that the purpose of hiding communication information is achieved by hiding the communication signal in the radar transmitting signal; the radar transmitter and the signal processor do not need to be changed, only one more step of removing the radar signal through the time delay frequency difference estimation algorithm is needed for the communication processing system, the change of the whole system is small, the radar and the communication are shared in the time domain and the frequency domain, and the resource utilization rate is effectively improved.

A gunshot detection system includes a housing, a radar transmitter connected to the housing, a plurality of radar antennas connected to the housing, and a controller connected to the housing. The controller is operatively connected to the radar transmitter to cause the radar transmitter to generate radar transmission signals. The controller is configured to receive and record reflection data from the plurality of radar antennas. The controller is configured to determine a gunshot origination location of each bullet moving through a detection zone based on the reflection data.

The invention provides an unmanned aerial vehicle laser radar-based earthwork visualization accurate measurement and calculation device, and relates to the technical field of surveying and mapping engineering, and the device comprises a mobile base, a storage box arranged on the top end working surface of the mobile base, an unmanned aerial vehicle body capable of being parked on the storage box, and an external control device; the movable base has preset bearing capacity and can support the weight of each component on the movable base; the storage box is provided with a preset containing space, electric lifting rods are arranged at the four corners in the storage box, the telescopic ends of the electric lifting rods are connected with the parking platform, and the parking platform can make contact with the unmanned aerial vehicle body. A laser radar measuring mechanism is arranged on one side of the unmanned aerial vehicle body and used for scanning and measuring topographic data of a construction area. Through the arrangement of the laser radar measurement mechanism, the stability of the laser radar transmitter in the measurement process is ensured, so that the laser radar can efficiently and accurately scan and measure topographic data of a construction area.

The invention relates to a central unit (Z) for a radar system, which, in addition to the central unit (Z), comprises at least one radar transmitter (S-1, S-2, S-3, Sn) and at least one radar receiver (E-1, E-2, E-3, En). The central unit (Z) provides an optical carrier signal, modulates a radar driver signal onto the optical carrier signal, and transmits the optical carrier signal modulated with the radar driver signal to the at least one radar transmitter (S-1, S-2, S-3, Sn) and / or the at least one radar receiver (E-1, E-2, E-3, En). The central unit (Z) receives an optical signal from the at least one radar receiver (E-1, E-2, E-3, En) to which a radar echo signal is superimposed, and separates the superimposed radar echo signal from the received optical signal by means of an opto-electrical conversion.By mixing the optically-to-electrically converted radar echo signal with a local oscillator signal, a downward conversion of the radar echo signal into a lower frequency signal is performed in the central unit (Z).

The invention relates to a radar system (100) and a method for operating a radar system (100). Furthermore, the invention relates to a radar transmitter (50), a radar receiver (70), and a central unit (10) of such a radar system (100). In addition, the invention relates to a method for operating a radar transmitter (50), a method for operating a radar receiver (70), and a method for operating a central unit (10). It is intended that a frequency-modulated noise signal is used as the radar driver signal for the radar system (100). Advantageously, the non-periodicity of the noise signal is used to uniquely identify the distance to a target based on the noise signal contained in the radar echo signal. Thus, the noise signal achieves a large range of uniqueness for range measurement and avoids overreach of the radar system (100).

A system and method for verifying the scattering characteristics of an airborne escort target, a two-aircraft formation is constructed for scattering characteristic testing, a forward pod is installed at the wing tip of the leading edge of each aircraft, a rearward pod is installed at the wing tip of the trailing edge, and a complete radar transmitter and receiver are integrated inside each pod, which can independently complete radar signal transmission, scattering signal reception and preliminary processing. The aircraft is equipped with a global positioning system and a tactical data link for precise positioning of the aircraft and sharing and collaboration of key information. The invention uses multiple flight strategies such as forward and rear formation, lateral formation and dynamic formation to measure the mutual irradiation of the two aircrafts, comprehensively obtain the forward, rear, lateral and full-angle radar scattering characteristic signals of the target aircraft, generate high-precision two-dimensional radar images by combining echo data processing technology, and accurately locate electromagnetic scattering defects.

The invention relates to a radar system (100) and a method for operating a radar system (100). Furthermore, the invention relates to a radar transmitter (50), a radar receiver (70), and a central unit (10) of such a radar system (100). In addition, the invention relates to a method for operating a radar transmitter (50), a method for operating a radar receiver (70), and a method for operating a central unit (10). The generated radar ramp signal is designed to comprise a multitude of frequency levels, at each of which the signal frequency is held constant for a predetermined waiting period. Advantageously, the frequency levels can be precisely controlled and recalibrated even during operation of the radar system (100), thus enabling interference-free continuous operation with high measurement quality.

The invention relates to a radar system (100) and a method for operating a radar system (100). Furthermore, the invention relates to a radar transmitter (50), a radar receiver (70), and a central unit (10) of such a radar system (100). In addition, the invention relates to a method for operating a radar transmitter (50), a method for operating a radar receiver (70), and a method for operating a central unit (10). The generated radar ramp signal is designed to be phase-modulated. Advantageously, the transmitted signal can be clearly identified in the radio echo signal, thus ensuring interference-free continuous operation with high measurement quality.

A system emulates multipath effects of a radar signal transmitted by a radar and reflected from an emulated target and an emulated surface. The system includes RTSs configured to generate and transmit emulated echo signals having different phases in response to the radar signal, where a first RTS is configured to emulate the emulated target, receiving the radar signal via a direct path, and at least one second RTS is configured to emulate at least one ghost target corresponding to the emulated target; and a controller configured to control the RTSs to generate and transmit the emulated echo signals at the different phases, which correspond to the RTSs receiving the radar signal from the radar transmitter and the radar receiver receiving the emulated echo signals from the RTSs over different combinations of the direct the indirect paths to replicate interference effects caused by multipath propagation.

The invention relates to a radar system (100) and a method for operating a radar system (100). Furthermore, the invention relates to a radar transmitter (50), a radar receiver (70), and a central unit (10) of such a radar system (100). In addition, the invention relates to a method for operating a radar transmitter (50), a method for operating a radar receiver (70), and a method for operating a central unit (10). The radar signal to be emitted is designed to be pulse-modulated. By reducing the pulse duration of the radar signal, the pulse frequency can advantageously be increased while maintaining the same transmission power of the emitted radar signal. The increased pulse frequency allows for a higher resolution of the radar system (100).

Radar transceiver device (1) for radar signals with a frequency-selective radar transmitter unit (2) and / or with a frequency-selective radar receiver unit (3), wherein the frequency-selective radar transmitter unit (2) of the radar transceiver device (1) comprises a digital-to-analog converter (2A) designed to convert a broadband digital signal provided for all transmit channels into an analog transmit signal, a signal modulator (2B) that modulates a signal carrier with the analog transmit signal output by the digital-to-analog converter (2A) to generate a modulated transmit signal, and has at least one frequency-selective component (2C) designed to divide the transmit signal modulated by the signal modulator (2B) into several transmit (TX) channels for transmission as a radar signal, and wherein the frequency-selective radar receiver unit (3) of the Radar transceiver device (1) at least one frequency-selective component (3C),which is designed to combine a received radar signal comprising several receive (RX) channels, a signal demodulator (3B) which demodulates the radar signal combined by the frequency-selective component by means of a signal carrier to generate a demodulated receive signal, and includes at least one analog-to-digital converter (3A) which is designed to sample the received signal demodulated by the signal demodulator (3B) to generate a digital receive signal.

A radar system according to the invention comprises a central unit (Z), at least one radar transmitter (S-1, S-2, S-3, Sn), and at least one radar receiver (E-1, E-2, E-3, En), each comprising optical and electrical components. A control unit (14, 49, 50) is provided in the central unit (Z), at least one radar transmitter (S-1, S-2, S-3, Sn), and / or at least one radar receiver, which is configured for adjusting the operating point of the optical and / or electrical components.

The invention provides a broadband phased array ground penetrating radar transmitter and a control method thereof, and relates to the technical field of phased array radar detection, and the broadband phased array ground penetrating radar transmitter comprises a control module, a TDC-based time difference measurement unit, a programmable microstrip line-based pulse shaping unit, a DDS module, a driving module and a Marx pulse circuit. The control module is used for parameter analysis and signal acquisition, reading waveform and delay parameters stored in the waveform memory, and issuing the waveform and delay parameters to the DDS module to generate trigger signals of each channel; the time difference measuring unit based on the TDC measures the inherent trigger time difference between the channels, and feeds back the inherent trigger time difference to the control module for parameter correction; the driving module receives the trigger signal and triggers and excites the Marx pulse circuit to generate a Gaussian pulse with extremely low time jitter; the pulse shaping unit based on the programmable microstrip line is used for shaping Gaussian pulses into monocyclic pulses, high time precision control and high peak power output of a transmitter are achieved, and the high-resolution phased array ground penetrating radar transmitter is suitable for a high-resolution phased array ground penetrating radar system.

A method of processing a communication signal for radar sensing and a vehicle-mounted radar signal, comprising: receiving a reflected communication signal reflected from one or more physical objects and a non-interference copy of a corresponding previously transmitted communication signal, and determining therefrom one or more first values, each first value is associated with an assumed speed and / or distance of a corresponding first candidate object with respect to the transmitter / receiver, respectively. The method further comprises receiving reflected vehicle radar signals reflected from the one or more physical objects and corresponding interference-free reference vehicle radar signals and determining therefrom at least one second value associated with an assumed speed and / or distance of a corresponding second candidate object relative to the radar transmitter / receiver. Target detection is performed on the second value and the at least one first value to identify and output possible physical objects and their speed and / or distance.

This application belongs to the field of radar transmitter power testing technology. This application provides a radar transmitter power testing device. In this embodiment, the SMA input port is connected to the power output coupler interface of the transmitter under test. After the transmitter is powered on, the power button is turned on to start the device; the shift switch is adjusted to the corresponding position, and the start button is pressed to test; the RF power detector, operational amplifier, AD conversion chip, CPLD chip, and microcontroller sequentially process the signal output by the transmitter under test to obtain the test results, which are then displayed on a monitor. This device is portable and can test the power and pulse width parameters of the transmitter under test in the field; it can also perform offline transmitter testing, has a high degree of automation, and is simple to operate. Simultaneously, this device can reliably complete the debugging, acceptance testing, inspection, and maintenance of the transmitter.

The invention provides a multisource fusion geophysical prospecting method based on directional drilling, which comprises the following steps: determining a detection range, depth, path and profile, and monitoring earth surface noise to obtain E1; performing numerical simulation inversion to obtain required lowest initial energy E3; a drill bit is provided with a vibration exciter and a radar transmitter and drills to a section along a path, and a receiver array is arranged on the earth surface; the method comprises the following steps: emitting electromagnetic waves, carrying out on-site interpretation imaging, emitting seismic waves, and carrying out deep learning fusion two-wave imaging; repeating section by section, and finally interpolating to construct an underground three-dimensional obstacle model. According to the invention, underground obstacles can be accurately identified in complex environments of urban high noise, limited space and the like, and the detection depth, the resolution and the construction safety are improved.

The invention discloses a radar communication machine based on EBPSK / MPPSK modulation, which comprises a transmitter power amplifier, a receiver intermediate frequency amplifier, a transceiving switch and an antenna / feeder line, and further comprises a data frame memory, an EBPSK / MPPSK signal modulator, an impact filter, a matched filter, two time gating gates and a radar signal detector, and a communication data demodulator. The data frame memory processes the randomized communication data code stream, and sends the randomized communication data code stream to the matched filter; and the EBPSK / MPPSK signal modulator processes a carrier signal of the radar transmitter by using the data in the data frame memory, and sends the carrier signal to the transmitter power amplifier. Under different combinations of the framework, the single-path EBPSK / MPPSK signal modem and the matched filter, the radar communication integrated equipment function can be obtained by using the same system.

The application relates to the field of elevator safety technology, in particular to a hierarchical collaborative braking control method for an elevator car under bidirectional out-of-control conditions. The speed sensor is used to collect the speed and acceleration of the car in real time, and the radar transmitter and the radar receiver are used to continuously measure the distance between the car and the bottom of the shaft; when the PLC controller judges that the car is overspeeding, the acceleration is abnormal, or the distance is less than the safety threshold and is rapidly downward, the electromagnet is powered to generate a magnetic field with the same polarity as the permanent magnet at the bottom of the car, and a non-contact magnetic repulsion is formed to slow down and buffer; at the same time, the spring pin is ejected and collides with multiple limiting steps on the limiting plates on both sides of the shaft, so that segmented mechanical deceleration is realized. If the electromagnetic brake fails, the oil pressure buffer serves as the final redundant protection. The application realizes unified and collaborative control of the top collision and falling bidirectional out-of-control, and has the advantages of rapid response, stable braking, reliable anti-rebound, and comprehensive redundant protection.