13 results about "Radar system design" patented technology

The invention discloses a phased array radar antenna and a detection method thereof, and belongs to the technical field of phased array radars, and the method comprises the steps: designing a radar system to improve the performance, optimize from multiple aspects, select and adapt to the antenna array size and arrangement of radar application, optimize the number and position of units, and determine the configuration through an algorithm to meet the beam detection precision. According to the method, phased array radar electronic control is improved, a high-precision DSP technology is used for regulating and controlling the phase of an antenna unit, the phase adjustment performance is improved to guarantee beam scanning, and a self-adaptive beam forming technology is applied. According to the method, the correlation between the target and the target is cancelled, the target is prevented from following an interference point, the probability of wrong target following is effectively reduced, the correlation judgment accuracy is improved through correlation of multi-dimensional information such as radial speed and echo characteristics, and the target tracking stability is improved while the maneuvering target tracking capability is kept.

The invention relates to the field of radar system design, in particular to a chaotic orthogonal waveform design method suitable for a one-transmitting multi-receiving radar system. Comprising the following steps: setting a group of M mutually different initial conditions for a radar system with a one-transmitting and M-receiving architecture; respectively substituting the M initial conditions into a chaotic system equation for numerical integration to obtain M chaotic time sequences; the M chaotic time sequences are preprocessed, and an orthogonal waveform set comprising M radar baseband waveforms which are orthogonal to one another is generated; performing linear superposition on M mutually orthogonal radar baseband waveforms in the orthogonal waveform set to form a combined transmitting signal; performing emission and distributed echo receiving on the combined emission signal to obtain a digitized mixed baseband echo signal; and carrying out separation and matched filtering processing on the mixed baseband echo signal at a receiving end. According to the invention, the problem that signals are difficult to effectively separate at a plurality of receiving ends in the existing one-transmitting-multiple-receiving system is solved.

The invention provides a time sequence control method and system for a target indication radar signal processing system, and belongs to the technical field of radar system design, and the method comprises the steps: an upper computer transmits protocol information to a signal processing board through serial port communication, the signal processing board analyzes a protocol, then forwards the protocol to a DA signal generation board and an AD signal collection board, and transmits the protocol information to the DA signal generation board and the AD signal collection board; parameter setting of each board card is completed, and a setting response is returned to the upper computer; after receiving a parameter setting correct response, the upper computer issues echo data to the DA signal generation board, and the DA signal generation board caches the echo data and generates an echo data loading completion signal; the signal processing board loads a completion signal according to echo data and generates a synchronizing signal to control the DA signal generation board to generate an echo signal, the AD signal acquisition board acquires the echo data and preprocesses the echo data, a preprocessing result is sent to the signal processing board to be processed, and finally the processing result is transmitted back to the upper computer. The invention provides an efficient and flexible sequential logic architecture.

This invention relates to a coherent multichannel transceiver system and method based on RFSoC, belonging to the field of electronic information technology. Specifically, it is a coherent multichannel transceiver channel based on RFSoC, which can be used in radar system design and multichannel communication system design. This invention comprises a multichannel system consisting of multiple RFSoC boards. Each board uses an RFSoC chip to generate and receive multiple channels of signals. The multiple boards are interconnected through a main control timing module and a clock reference module, which provide clock reference signals and synchronization timing pulse signals. Within each board, the combination of the clock signal and the clock reference signal, along with a calibration and compensation module, achieves high-precision phase coherence and timing synchronization between the multiple boards. Each RFSoC internally achieves phase coherence of multiple transceiver channels through measurement and adjustment mechanisms.

The invention belongs to the technical field of radar systems, and discloses a dual-system all-solid-state marine radar. The system comprises an antenna pedestal rotary table, a low-profile waveguide slot antenna, a servo unit, a power supply unit, a radio frequency switching unit, a pulse transceiving unit, a continuous wave transceiving unit, a main control unit and a display control terminal. According to the invention, the design of an all-solid-state and all-coherent dual-system radar system is utilized, the inherent technical defects of a traditional magnetron monopulse system and a single solid-state system marine radar are made up, the technical advantages of a pulse compression system and a linear frequency modulation continuous wave system are integrated, the radar performance is improved, and more abundant functions are integrated at the same time; and the use requirements of modern ships in application scenes such as open sea navigation, narrow water channel passing, port entering and leaving, search and rescue, collision early warning, panoramic blind compensation and the like can be met.

The invention discloses a software and hardware design method of a radar frequency agility control system based on an RFSoC, and the method employs a ZYNQ chip and a radio frequency front-end receiving and transmitting assembly to carry out the design of a radar system, and employs an upper computer to carry out the control and transmission of frequency agility parameters. Waveform generation is carried out through a ZYNQ chip, AD / DA conversion is carried out, frequency agility control is carried out through a control radio frequency front-end transceiving assembly, and rapid response to interference changes can be realized through efficient processing and real-time control. According to the RFSoC-based radar frequency agility control system digital signal processing platform, radar waveform generation and inter-frame agility, inter-pulse agility and shield agility of radio frequency can be realized according to radar application scene requirements.

A design method for a phased array radar system based on antenna and RF transceiver integration is disclosed. The phased array radar system includes: a phased array antenna feed system connected to an integrated channel module; a secondary power supply module connected to power the phased array antenna feed system, the integrated channel module, and a signal processing module; the integrated channel module connected to the signal processing module; the phased array antenna feed system includes a basic module and waveguide sum and difference circuits; the basic module is packaged using wafer-level packaging technology, consisting of a multi-channel silicon-based CMOS T / R chip, an antenna, and a substrate; the integrated channel module includes a transceiver frequency converter chip and a frequency synthesizer; the transceiver frequency converter chip includes a transmit link and a receive link; the receive link includes a sum and receive channel, an azimuth difference receive channel, and an elevation difference receive channel. This invention adopts a phased array radar integration design concept based on silicon-based chip design, significantly reducing system cost and achieving miniaturized design.

The invention discloses an airborne photon laser background noise modeling method based on a bidirectional reflection model, and belongs to the technical field of radar imaging. Comprising the following steps: constructing a surface reflection function based on a dynamic BRDF; respectively calculating an atmospheric energy influence function and a receiver energy conversion function; and according to the atmospheric energy influence function, the receiver energy conversion function and the surface reflection function constructed based on the dynamic BRDF, modeling to obtain an airborne photon counting laser radar background noise model. According to the dynamic geometric coupling noise field modeling method based on the bidirectional reflectance distribution function, the zenith angle and the azimuth angle in the incident direction of the sun and the observation direction of a receiver are coupled in real time, the space-time propagation mechanism of noise photons is accurately described, the limitation of a traditional Lambertian hypothesis on directivity is effectively broken through, and the method has the advantages of being high in practicability and high in practicability. The precision of dynamic noise field modeling is remarkably improved, and a solid theoretical basis is provided for design optimization and data processing of an airborne laser radar system.

An apparatus determines parameters of an electronic device using a vector network analyzer. The electronic device is designed for a radar system and configured to be set in any one of a plurality of states. The vector network analyzer is configured to run a test of the electronic device. The apparatus includes a device controller configured to set a state of the electronic device, an analyzer controller configured to send to the vector network analyzer a test trigger signal for triggering the test of the electronic device, and a determination controller configured to determine the parameters based on setting the state of the electronic device, and on triggering the test of the electronic device.

The application belongs to the technical field of radar system, and particularly relates to a general radar timing real-time generation and updating method based on FPGA. The application specifically comprises establishing a radar working mode table according to different radar systems, and updating radar working mode parameters in real time for each CPI. When the radar working mode parameters are updated, a timing state machine in a reference timing module is used to switch and control a timing generation counter in real time. Thus, the timing pulses required by the radar system can be generated in real time and can be updated in real time. The application overcomes the poor generalization of the conventional radar timing module, and only needs to design different working mode tables for different radar systems to complete the generation of timing pulses in different working modes without updating the FPGA program of the timing module. Meanwhile, the application can realize the real-time switching of the timing in different working modes through the ping-pong switching of the timing state, thereby improving the stability of the radar system working.

The invention provides a radar system design method and device based on multidisciplinary design optimization MDO, and relates to the field of electronic reconnaissance, and the method comprises the steps: decomposing a radar system into a transmitting subsystem and a receiving subsystem based on a cost variable part in the radar system design; constructing a radar system design optimization model according to a multidisciplinary design optimization (MDO) method, and screening and sorting historical sample data based on a Latin hypersquare test design method to obtain a first target data set; and adopting a Kriging agent model method, and performing algorithm training and optimal point prediction on the radar system design optimization model by using the first target data set. According to the invention, a complex multidisciplinary highly-coupled radar system design problem is decomposed, and design parameters of a transmitting subsystem and a receiving subsystem are optimized, so that the total cost of the system is lowest; in addition, the scheme has little dependence on radar system designers, and is convenient to propagate and inherit in practical application.

The application discloses a kind of L wave band wide-beam high-power array surface design method and array surface, belong to radar system design and electronic countermeasure technical field, by inputting design into self-built optimization algorithm and optimizing, obtain N el ×N az Phase shift value, that is, by using the mode of equal amplitude and different phase, a wide-beam working mode with a beam width greater than 20°×20° is realized, which overcomes the defect that the existing technology needs to close part of the function by using the mode of equal amplitude and same phase, resulting in lower radiation power, and can increase the radiation power by more than 10.7dB, thereby expanding the range of the array, solving the contradiction between wide-beam and high-power in the array, and realizing wide-beam working mode and high-power at the same time.

The invention provides a synthetic aperture radar (SAR) four-dimensional imaging interference suppression method and system, and belongs to the technical field of satellite-borne radar system design and signal processing. The method comprises the steps that target four-dimensional information is coarsely reconstructed through pixel-by-pixel joint optimization; interference enhancement and residual calculation; carrying out space-time clustering interference detection and suppression; and target four-dimensional information is accurately reconstructed through pixel-by-pixel joint optimization. The system comprises a pixel-by-pixel optimization module for realizing the method, an interference enhancement and residual calculation module, a space-time clustering interference detection and suppression module and the like. According to the method, the problem of radio frequency interference suppression faced by SAR four-dimensional imaging is solved, the imaging precision and robustness in a complex scene are remarkably improved, and the method is suitable for the fields of resource investigation, disaster monitoring and the like.