8 results about "Impulse radar" patented technology

This invention discloses a practical single-pulse radar training simulator architecture, employing a three-layer structure design consisting of a user layer, a middleware layer, and an execution layer. The user layer, based on a B / S architecture, handles human-computer interaction, training processes, and scenario configuration. It pre-generates and distributes target trajectory-related simulation parameters and pre-set information for abnormal events, while simultaneously collecting operational information and device status and conducting training evaluation. The middleware layer is an embedded control platform used to acquire servo differential angle information in real time, calculate angular error, attenuation, phase, and Doppler echo control parameters, as well as abnormal control quantities, according to the PRF beat. The execution layer is a DRFM simulation sub-unit that receives radar transmitted pulses and applies time delay, Doppler, and amplitude-phase modulation based on control parameters, generating the main target, debris, co-frequency station, and noise echoes for output to the trained radar. This invention achieves a balance between complexity and real-time performance through functional decoupling and separation of responsibilities, supporting high-fidelity training under multiple targets and multiple abnormal conditions.

A radar system that uses a range walk compensation algorithm to reduce system losses resulting from moving targets. During the coherent integration of pulse radar systems, the conventional Fast Fourier Transform (FFT) for Doppler processing needs to change the input range bin number in accordance to the velocity of the target. The algorithm allows for configuration of Doppler groups to compute several Dopplers with one FFT. Each Doppler group has a transform Doppler that is close to the center of the group which will dictate the change of range bins for the input data to the FFT. As the range bins are changed, there are two input filter techniques: nearest bin select, and 2-tap filter. After range walk compensation processes all Doppler groups by FFT, the resultant output block has much higher coherent integration as compared to just a conventional FFT.

This invention discloses a millimeter-wave high-amplitude and phase-coherent single-pulse sum-difference network, belonging to the field of single-pulse radar. The sum-difference network is a symmetrical planar structure, including two first-order planar magic-Ts, two second-order planar magic-Ts, two 90° twisted waveguides, four 90° waveguide turning structures, and an electromagnetic bandgap structure disposed around the network. The first-order and second-order planar magic-Ts are identical planar magic-Ts, composed of an H-plane power divider and an E-plane waveguide. The electromagnetic bandgap structure includes an interleaved slot electromagnetic bandgap structure and a metal pillar electromagnetic bandgap structure. This invention employs an integrated planar structure, requiring only one-time processing and assembly, significantly reducing processing and assembly errors. Simultaneously, the planar magic-Ts are designed to effectively avoid the inherent dispersion defects of bridges and phase shifters, achieving high amplitude and phase coherence over a wide bandwidth. Furthermore, the use of a hybrid electromagnetic bandgap structure reduces the fabrication difficulty of the device while preventing electromagnetic leakage.

The present application belongs to the technical field of phased array radar monopulse and difference angle measurement, and particularly relates to a method for quickly generating angle discrimination curves of a monopulse radar at multiple pointing angles, which comprises the following steps: measuring the azimuth and elevation angle discrimination curves of the normal wave position of a phased array of a monopulse radar in a darkroom environment; scanning the beam pointing according to a designed trajectory, and synchronously rotating the turntable according to a corresponding designed trajectory to measure the difference and ratio data at the designed wave position; characterizing the deformation of the angle discrimination curves caused by the non-ideal factors of the phased array as translation and rotation, and calculating the translation coefficient C and the rotation factor K of the angle discrimination curves at different wave positions compared with the angle discrimination curves at the normal wave position based on the measured difference and ratio data; based on the obtained translation coefficient C and rotation factor K of the wave position, interpolating and predicting the C and K of all wave positions within the required wave position range; and based on the C and K of all wave positions, constructing a lookup table and writing it into the phased array radar to complete the quick generation of the angle discrimination curves of the monopulse radar at multiple pointing angles.

The application discloses a vehicle sentry low-power consumption hierarchical wake-up method and system based on pulse radar, and relates to the technical field of radar detection.The method comprises the following steps: transmitting a radar signal under static state, and constructing a perturbation echo baseline; evolving the difference between continuous echoes and the baseline, and establishing a first perturbation offset; positioning an anomaly according to the first perturbation offset, taking distance features, and establishing a second perturbation offset; determining spatial stability in combination with the two offsets; switching to enhanced sampling when instability occurs, and forming target motion description; and configuring hierarchical wake-up and executing perception management according to the target motion description.The application solves the technical problem that the existing vehicle sentry monitoring system has high power consumption and is difficult to balance the environmental perturbation recognition accuracy and the timely wake-up response of abnormal targets under the static guard scene of continuous high-frequency perception, and achieves the technical effects of realizing accurate anomaly disturbance determination, target motion enhanced perception and hierarchical wake-up management on the basis of low-power consumption static monitoring, reducing the whole vehicle standby power consumption, and improving the vehicle sentry monitoring reliability and response efficiency.

The embodiment of the application provides a pulse radar transmitter chip and electronic equipment, and belongs to the chip technical field.The pulse radar transmitter chip comprises a direct pulse generation circuit, a full-digital power amplifier and an output matching network which are sequentially connected.The direct pulse generation circuit works at an ultra-wideband frequency and comprises a pulse generation sub-circuit and a pulse modulation sub-circuit.The pulse generation sub-circuit is used for generating at least n delay different pulse signals, and n is an integer greater than or equal to 2.The pulse modulation sub-circuit is m, which is used for modulating the pulse signals on the pulse signal output end of the pulse generation sub-circuit into pulse control signals, and m is an integer greater than or equal to 1.The embodiment of the application can generate high-precision radar pulse signals, and the whole circuit is a full-digital circuit, so that the power consumption is low, thereby improving standby and working time of the UWB system whole machine based on the chip.

An ultrashort-range target detection pulse radar system according to the present invention comprises: an antenna unit for propagating a transmission pulse and receiving a signal reflected from a target; a transceiver unit including a plurality of transceiver modules and individually controlling a transmission amplifier and a reception amplifier included in each of the plurality of transceiver modules; a signal processing unit for processing a signal received from the transceiver unit; and a control unit for controlling selection of positions of the transmission amplifier and the reception amplifier to minimize interference therebetween.

The application relates to a millimeter wave radar gesture recognition method based on envelope data feature extraction, belonging to the technical field of millimeter wave radar application. Millimeter wave radar is used to collect data of different gestures to form envelope data, and the data is packed and saved in txt or mat format for subsequent processing; all packed data is read by Matlab, feature quantities of all data are directly calculated, and feature quantity scatter diagrams are drawn according to all permutations and combinations of the feature quantities; three feature quantities with the largest scatter point separation of different gestures are selected from the scatter diagrams, that is, the scatter points of different shapes are most obviously separated, and the feature quantities are used for gesture discrimination; interval division is carried out, and different intervals of each feature quantity correspond to different gesture determination. The application uses a single-transmitting single-receiving narrow pulse radar to collect gesture data and uses the method to perform gesture recognition and classification, so that a higher gesture recognition accuracy is realized by using a simpler algorithm and lower calculation complexity.