198 results about "Radar transmitter" patented technology

The invention relates to the technical field of radar communication, and discloses a detection identification method and system based on frequency modulation and pseudo-random coding, and the method comprises the steps: a detection device sets waveform parameters, and generates and transmits a Chirp signal to a target device through a radar transmitter; the target device performs frequency and phase modulation on the incident Chirp signal through the electromagnetic metasurface, and then reflects the modulated Chirp signal; and the detection equipment adopts a Chirp signal obtained in the same modulation mode as the target equipment as a matched filter, performs matched filtering on the received echo signal, calculates the code and the distance of the target equipment, and realizes radar detection and target identification. According to the invention, the target passively performs frequency and phase modulation on the incident radar signal through the electromagnetic metasurface, and the detection method can solve the target modulation coding information by knowing the target echo modulation mode so as to identify the target.

A multistatic radar system is provided for detecting and tracking targets moving in a surveillance area that includes: a radar transmitter and a plurality of radar receivers located in different positions in the surveillance area and processing means. The radar transmitter and the radar receivers are configured to obtain a GNSS-based time reference based on the GNSS signals received by the respective GNSS receiver. Each radar receiver is configured to determine, for each radar echo received by the radar receiver from a respective target, a corresponding distance-related information item based on the predefined transmission time and frequency pattern, the GNSS-based time reference and a respective reception time of the radar echo, and to provide the processing means with data indicative of the distance-related information items and the Doppler frequencies determined by the radar receiver, and reference times associated with the distance-related information items and the Doppler frequencies.

A system comprises a light source, a radar transmitter, a light receiver, a radar receiver, and a processor. The light source is configured to emit a light pulse. The radar transmitter is configured to transmit a radar signal, wherein an emission direction of the light pulse of the light source and a transmission direction of the radar signal of the radar transmitter are at least in part synchronized. The light receiver is configured to detect a reflected light pulse, the radar receiver is configured to detect a reflected radar signal, and the processor is configured to determine a dimensional representation of an environment based at least in part on the detected reflected light pulse and the detected reflected radar signal.

The embodiment of the utility model provides a weather radar standard signal processor. The method is applied to radar technology. The signal processor comprises a signal processing unit, a signal control transmitting unit, an acquisition unit and a data storage and transmission unit; wherein the signal processing unit generates an intermediate frequency signal and sends the intermediate frequency signal to the signal control emission unit, the signal control emission unit generates an emission signal according to the received intermediate frequency signal, and the acquisition unit comprises five A / D converters, the four A / D converters are used for collecting high-gain / low-gain echo signals returned by transmitting signals in the horizontal channel / vertical channel and converting the high-gain / low-gain echo signals into digital signals, the remaining A / D converter is used for collecting transmitting pulses of the transmitting signals, generating transmitting sample signals and converting the transmitting sample signals into digital signals, and the collecting unit sends the generated digital signals to the signal processing unit. The signal processing unit carries out signal processing on the received digital signals and sends data after signal processing to the data storage and transmission unit, and the data storage and transmission unit stores the data after signal processing or sends the data to other systems / devices according to needs. In this way, data transmitted / received by radars of various models can be subjected to unified and normative standardized processing to realize functions of radar control, signal processing, calibration control and the like, so that the networking radar data quality has consistency, the networking radar data quality and the calibration precision of part of key parameters are improved, the calibration time interval is shortened, and the calibration efficiency is improved. In addition, the used standardized interface can transmit signals to radar transmitters / receivers of different models according to needs.

Systems and implements sense, analyze, and display different soil parameters. A soil sensing system includes a mechanical component of an agricultural implement and at least one sensor disposed on the mechanical component. The sensor generates an electromagnetic field through a region of soil as the agricultural implement traverses a field. The sensor comprises at least one radar transmitter and at least one radar receiver and the sensor measures different soil parameters including a soil dielectric constant.

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.

A wireless communication network performs multi-static radar operations, including operating multiple access points as geographically-diverse radar transmitters that transmit illumination signals, for illumination of a target region, and an example User Equipment (UE) operates as a radar receiver with respect to the multi-static radar transmission. The network may perform multi-static radar operations on demand, for power savings and interference reduction, and UEs may indicate particular radar-sensing needs or capabilities when requesting multi-static radar operation, for consideration by the network when configuring the corresponding illumination-signal transmissions.

The invention belongs to the technical field of laser radars, and provides a laser radar calibration method and device, computer equipment and a storage medium, and the method comprises the steps: rotating a laser radar, enabling a light spot emitted by an nth emitter of the laser radar to irradiate a detection region of a calibration plate with a known size from an original position, rotation data generated when the laser radar rotates the nth transmitter is recorded; based on preset data parameters of the calibration plate, target light spot image coordinates corresponding to laser beams emitted by the emitters, and rotation data generated by the motor, a corresponding real emitting angle of a light spot emitted by a single emitter at an original position is obtained. The emergent angle of the laser radar transmitter can be calibrated more efficiently by using the real emergent angle, and the real performance of the laser radar is restored.

Liquid level detection systems and methods include a sensor having one or more radar transmitters, a plurality of radar receivers, and an antenna associated with each of the radar receivers at a respectively unique location relative to a liquid storage tank. A processor is configured to determine, based on radar returns from combinations of the one or more radar transmitters and the plurality of receivers, a single liquid level output for the storage tank in order to reduce an influence of possibly inaccurate radar returns due to localized effects from tank imperfections and / or solid / liquid buildup in the storage tank.

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.

A radar transmitter transmits a radar signal through a transmitting array antenna at a predetermined transmission period, and a radar receiver receives a reflected wave signal which is the radar signal reflected by a target through a receiving array antenna. A transmitting array antenna and a receiving array antenna each include multiple subarray elements, the subarray elements in the transmitting array antenna and the receiving array antenna are linearly arranged in a first direction, each subarray element includes multiple antenna elements, the subarray element has a dimension larger than a predetermined antenna element spacing in the first direction, and an absolute value of a difference between a subarray element spacing of the transmitting array antenna and a subarray element spacing of the receiving array antenna is equal to the predetermined antenna element spacing.

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.

The disclosed embodiment is about an adaptive strategy for the optimal photon number of a quantum interferometer radar under a stratocumulus cloud background. It includes: a QIR system generates detection photons and reference photons with preset photon numbers, and directs the detection photons toward the detection target; the QIR system receives the reflected detection photons; a mathematical model is established based on the influence of the scattering, absorption, and other characteristics of the liquid water content of the stratocumulus clouds in the atmospheric environment on the reflected detection photons, and the relationship between the liquid water content of the stratocumulus clouds, the number of radar transmitter signal photons, and the transmission distance of the detection photons is obtained; based on the relationship between the liquid water content of the stratocumulus clouds, the number of transmitter signal photons, and the transmission distance of the detection photons, the number of radar transmitter photons is adaptively adjusted so that the radar system can achieve the optimal average photon number. The disclosed embodiment effectively improves the robustness of the QIR system under the water content of stratocumulus cloud particles by adjusting the average photon number of the QIR system in real time.

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.

The invention provides a laser radar calibration method and device and a computer readable storage medium, and the method comprises the steps: obtaining the working time and junction temperature of n times of scanning of a laser radar, and determining the emission light intensity of the laser radar according to the working time and junction temperature of n times of scanning. Further, probe light is emitted to the target object, an echo signal is received, and the reflectivity of the target object is obtained according to the intensity of the emitted light and the echo signal. Through the method, the device and the computer readable storage medium, the problem that the measured reflectivity information is inaccurate due to power attenuation of the laser radar transmitter can be improved, and the accuracy of the detection information is improved.

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 transceiver includes a radar transmitter and a radar receiver. The radar transmitter includes generation circuitry to generate a digital radar chirp sequence, and one or more digital-to-analog converters to convert the digital radar chirp sequence into a radar signal to be transmitted via one or more transmit antennas. The radar receiver includes one or more analog-to-digital converters to convert a received reflection of the radar signal to a received digital signal, and a mixer to mix the received digital signal with the digital chirp sequence to generate a digital de-chirped signal for velocity estimation followed by range estimation.

The utility model discloses an anti-collision reversing radar device. The radar comprises a U-shaped support and a radar body installed in the U-shaped support, and the radar body comprises a machine shell provided with a battery bin and a component containing cavity, a battery inserted into the battery bin and a Bluetooth module arranged in the component containing cavity. The component placement cavity is located above the battery bin, a top cover plate used for sealing the component placement cavity is arranged at the top of the machine shell, and a radar transmitter connected with the Bluetooth module is further installed on the machine shell. The utility model has the advantages that the U-shaped bracket is used as a carrier for supporting and mounting, the collision problem is avoided, the mounting is reliable, the information transmission accuracy is effectively ensured, the protection effect can be further achieved, the mounting angle of the radar main body can be adjusted as required, the mounting is convenient, and the purpose of adjusting the angle is achieved. And the whole structure is compact, the product is beautiful, the assembly is convenient and fast, the later maintenance is easy, the use performance is ensured, and the use reliability is further improved.

A radar transmitter includes: a plurality of transmission antennas that transmit a transmission signal; and a transmission circuit that applies a phase rotation amount corresponding to a Doppler shift amount and a code sequence to the transmission signal to perform multiplexing transmission of the transmission signal from the plurality of transmission antennas. Each of the plurality of transmission antennas is associated with each of a plurality of combinations of the Doppler shift amount and the code sequence. Each of the plurality of combination is different at least one of the Doppler shift amount and the code sequence, and the Doppler shift amounts of those of the plurality of combinations which are associated respectively with at least two transmission antennas of the plurality of transmission antennas are the same Doppler shift amount, the at least two transmission antennas being a first sub-array antenna.

1. Name of the product in this design: Phased array incoherent scattering radar transmitting power supply. 2. Application of this design: This product relates to a power supply for a phased array incoherent scattering radar. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

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 provides a radar transmitter radio frequency signal detection device and detection method, which comprises a device base, and a loading box is arranged above the device base. The radar transmitter radio frequency signal detection device and detection method are provided with a protection mechanism outside the test box, so that the test box is stored by the protection block, the test box does not directly contact the outside during transportation, the inside of the protection block is further provided with a damping spring and a shock absorber, the test box is protected by damping, the protection efficiency is further improved, the periphery of the protection block is further provided with a bottom plate and an adjusting screw rod, four adjusting screw rods do not interfere with each other, so that the position of the bottom plate can be adjusted at will according to the field conditions, the height of the protection block is adjusted, the position of the test box is adapted, and the use convenience of the test box is improved, and the test box is convenient to protect and transport.

A radar system comprises a first radar transmitter arranged to transmit a first signal that propagates perpendicular to a direction of travel of a first object and a second object. The radar system further comprises a first radar receiver arranged to receive the first signal. Additionally, the radar system comprises a second radar transmitter spaced apart from the first transmitter and arranged to transmit a second signal that propagates perpendicular to the direction of travel of the first object. The radar system comprises a second radar receiver arranged to receive the second signal. The radar system further comprises a processor arranged to detect a space between the first object and the second object.

The invention discloses a method for correcting a laser radar, a control device and the laser radar. Acquiring light spot energy data generated by a detector when a reflected light beam irradiates a detection surface of the detector of the laser radar, wherein the reflected light beam is formed by reflecting an emission light beam emitted by an emitter of the laser radar through the inner wall of the laser radar; and correcting the receiving position of the detector and / or the transmitting parameter of the transmitter according to the light spot energy data. According to the embodiment of the invention, the optical loop formed by the reflection of the inner wall of the laser radar is utilized to realize the correction of the receiving position of the detector and / or the transmitting parameter of the transmitter. The scheme does not depend on an external environment and is wide in application scene; normal work of the laser radar is not affected, and a user can be non-inductive. And the transmitting performance and the receiving performance of the laser radar can be corrected, so that the detection precision of the laser radar is integrally improved.

This application discloses a signal receiving method and device, a medium, and a radar system. The radar system includes: a window, a radar transmitter, a radar receiver, a processor, and a signal receiving circuit. The radar transmitter is configured to: transmit a radar detection signal to a front obstacle through the window. The radar receiver is connected to the signal receiving circuit, and receive a reflected signal generated by the obstacle, and transmit the reflected signal to the signal receiving circuit. The signal receiving circuit is connected to the processor, and when the radar transmitter transmits the radar detection signal, receive, after preset duration, the reflected signal where the preset duration is a sum of first duration required for the radar detection signal to arrive at the window and second duration required for the reflected signal to arrive at the radar receiver from the window.

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.

A system, clutter cancellation circuit and a method generate a clutter cancellation signal for radar by receiving, at the clutter cancellation circuit, a radar transmission signal generated by a radar transmitter, and generating, by the clutter cancellation circuit, the clutter cancellation signal by attenuating, delaying and phase shifting the received radar transmission signal using attenuator, a signal delay, and a phase shifter in any order. The clutter cancellation signal can then be used to cancel one or more clutter signals within a radar return signal.

The invention discloses a noninvasive blood glucose detection device and method. The noninvasive blood glucose detection device comprises a radar transmitter, a radar receiver, a data acquisition module, a blind source separation module, a feature extraction module and a blood glucose evaluation module, a broadband radio frequency modulation signal emitted by the radar transmitter irradiates a certain human tissue, a reflected radio frequency signal is received by the radar receiver and then is converted into an analog baseband signal, and the analog baseband signal is sampled by the data acquisition module and then is converted into a digital signal. After the electromagnetic waves are transmitted to the blind source separation module for noise filtering, interference removal and data enhancement processing, feature information of the electromagnetic waves in the subcutaneous tissue blood transmission process is extracted, and then blood glucose concentration information is obtained through machine learning according to the feature information. When the device is used for measuring blood glucose, test paper or a reagent is not needed, and low detection cost, zero pollution, comfort and no feeling are realized.