33 results about "Radar system design" patented technology

Signal compensation systems and methods compensate an estimated range profile from a plurality of detected signal returns from a true range profile, wherein the signal returns correspond to an emitted stepped frequency pulse-train. An exemplary embodiment utilizes knowledge of the radar system design to identify locations, predict power levels, and suppress the contributions of stepped-frequency range sidelobes (ambiguous peaks) in the estimated range profile, resulting in a cleaner and more accurate radar display.

The invention relates to a phased array radar digital simulation system, and belongs to the technical field of radar system simulation. According to the phased array radar digital simulation system, a system framework is divided into a main sub system and three auxiliary sub systems, wherein the main sub system is a radar workbench simulation sub system and the three auxiliary sub systems are a simulation scene control sub system, a radar main control computer sub system and a radar analysis and evaluation sub system. The functions of the radar workbench simulation sub system are perfected by adding a control word interpreting module, a coordinate conversion module, a flight path intersection model and a loopback word delivering module, and therefore the real-time closed loop simulation of the whole phased array radar system can be carried out. The phased array radar digital simulation system has the advantages of being good in generality, good in instantaneity and capable of achieving the closed loop simulation, and can be applied to the design of modern phased array radar systems.

A high-precision ranging method and system for a dual-beam microwave landing radar, the steps of which are: simultaneously obtain the echoes of the landing beam irradiation area through the two beams of the antenna convex beam and the antenna concave beam; Calculate the envelope ratio of the concave beam echo; calculate the minimum value point position of the echo envelope ratio notch to obtain high-precision measurement of the beam distance; calculate the distance ratio of two distance points with the echo envelope ratio being 1 , look up the table to obtain the estimation of the incident angle of the beam center. The present invention obtains the echo of the landing beam irradiation area by configuring the convex and concave dual beams to measure the distance, and eliminates the inconsistency of the echo power distance path attenuation of each resolution unit in the beam and the asymmetric center estimation of the echo envelope caused by the existence of discrete strong scattering points The problem is that while improving the ranging accuracy, the estimated value of the incident angle of the beam center can be obtained. As an important parameter for safe landing, this technology has been applied to the design and application of the microwave landing radar system for the fourth phase of lunar exploration.

The invention discloses a method for self-adaptive synthesis and health diagnosis of multi-channel wide dynamic data, which is mainly used in radar system data sampling with higher requirements on dynamic range. In order to achieve a high dynamic range and ensure sensitivity, radar system design usually uses multiple channels with different gains to sample at the same time, and then synthesize the multi-channel data into one channel. The invention ensures the high efficiency and reliability of multi-channel data synthesis through methods such as self-adaptive gain correction, inflection point identification based on intermediate frequency sampling, optimum working range and hysteresis comparison channel selection, automatic fault identification and removal, and the like.

The invention discloses a microwave correlated imaging simulation method based on an analysis surface element. The method comprises the steps: firstly constructing a target 3D model scene, obtaining the space information of a corresponding target scene according to observation parameters, calculating a single-scattering coefficient and a multi-scattering coefficient of the target scene, and obtaining the scattering coefficient distribution of the observation scene; secondly calculating an echo signal of the target scene according to a radiation field of a random antenna wave beam in an imaging plane; finally carrying out the correlating of the radiation field and the echo signal, and obtaining a simulation image result. The method achieves a quick simulation process in correlation imaging under the condition of the random radiation field, gives a solution for distributed scene correlation imaging high-efficiency simulation, can deepen the understanding of the imaging mechanism and scattering mechanism in a whole correlated imaging link, provides support for the design and index argument of the design of a correlated imaging radar system, also can be used for subsequent correlated imaging evaluation and image interpretation, and is high in practical value.

The invention discloses a bomb-borne multi-channel radar ultra-low-altitude target analysis and multi-path echo modeling method, which mainly solves the multi-path echo modeling problem existing when the bomb-borne radar measures the sea surface ultra-low altitude target. The implementation steps are as follows: constructing the multipath echo geometric configuration; dividing the effective scattering area of ​​the sea surface; calculating the Brewster reflection coefficient of the sea surface; calculating the equivalent scattering coefficient of the scattering unit; establishing a complete multi-channel multipath echo signal model. The multipath signal model constructed by the present invention has both the target signal and a large number of multipath echo signals in different directions. Compared with the existing multipath echo modeling method, the effective scattering area of ​​the sea surface is divided, and the scattering in the area is analyzed. Features, using the double-base equivalent theory and the Brewster effect, accurately expresses the objective environment of the target, improves the detection performance of the missile-borne radar in subsequent signal processing, and provides support for the multi-channel missile-borne radar system design and target detection.

The invention discloses a design method for a wide-range high-precision microwave distance measurement radar system. In regard to the design problem of the wide-range high-precision radar system, the design method comprises the following steps that 1, by means of waveform and time sequence design, remote measurement transmitting and receiving work in a time-sharing mode, large bandwidth and time-bandwidth signals are adopted in close distance measurement, and transmitting and receiving work at the same time; 2, the design of isolating a transmitting access and a receiving access is adopted to ensure that back waves can be collected and received effectively; 3, by means of the transmitted leakage signal removal technology, influence on back wave detection from close distance transmitted leakage signals can be restrained. By the adoption of pulse radar, the measurement range of 15 m to 16 km and the measurement precision of 0.33%*R when the range is larger than 120 m, and of 0.4 m when the range is smaller than 120 m are achieved.