Millimeter-wave random code phase-modulation and amplitude-modulation shipborne collision-proof radar

Abstract

The invention relates to the technical field of radio positioning, in particular to a millimeter-wave random code phase-modulation and amplitude-modulation shipborne collision-proof radar. A quasi-optical dielectric lens antenna annular array is arranged; a DSP cyclically scans wave beams to omni-directionally guard against a target possibly collided on a water surface; a broadband noise source generates two random code generators, a random code generator A modulates phase and measures distance / speed, and a random code generator B modulates amplitude, and performs transmitting / receiving conversion and back edge detection; double random code radio frequency is transmitted through an upconverter, an R / T3, a frequency multiplier and power amplifier, an R / T2, an isolator and an antenna; and back waves are transmitted to the DSP and an MCU for processing control through the antenna array, a beam switch, an isolator, an R / T1, a high frequency amplifier, a downconverter, an intermediate frequency amplifier, a random sequence asynchronous gate, a digital intermediate frequency quadrature detector I / Q and a digital pulse compression correlator. The radar ensures that a plurality of adjacentships sail without mutual interference and operate in a coexisting way, has high electromagnetic compatibility EMC, inhibits false-alarm and determines the position, distance and relative speed of atarget through the DSP, displays three-dimensional images and identifies a target closest to the ship through a CRT, performs the audible and visual alarm if the distance of the target is smaller thana safety distance, intelligently avoids a barrier or reduces speed if the distance of the target is approximate to a danger distance, and obviously improves the sailing safety of the ship.

Description

technical field [0001] The invention relates to the technical field of radio wave transmission and reception to detect target azimuth, distance and speed, in particular to a marine anti-collision radar with millimeter wave random code phase modulation and amplitude modulation. Background technique [0002] At present, with the rapid development of ocean shipping and inland river and lake shipping and fishery, a large number of ships are increasing, ports and waterways are becoming more and more crowded, and ships are often overloaded and speeding, especially when two or more ships meet, their inertial forces impact and set off large waves , affecting the course, it is not easy to operate correctly, causing ships to collide with each other or hit bridge piers, and in severe cases, the ship sinks, and even the bridge collapses. In severe weather such as storms, the probability of accidents is greater. Therefore, the application of radar collision avoidance to ensure navigatio...

AI Technical Summary

Problems solved by technology

In addition, simple monitors are difficult to distinguish adjacent targets, cannot display multiple target panoramic images, and lack early warning of relative positions, distances, and moving speeds

The existing anti-collision radar lacks the function of using sensor signals to form a closed-loop control, lacks the adaptive control of the antenna in the water environment, lacks the intelligent control of automatic obstacle avoidance, deceleration and braking, and cannot help the driver in time to avoid accidents in case of poor visibility or navigation distress

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