| The FMCW navigation radar Can be installed in all kinds of ship navigation radar on continuous wave(yachts, boats, ships, patrol boats, marine police boat), detection of various objects around the ship carrier: such as ships, buoys, bridge, embankment, ice, iceberg, coastline, islands, to the crew to provide target distance and azimuth information view according to the need of, send the alarm information, in order to avoid all kinds of dangerous obstacles, to prevent the collision accidents, guarantee the safety of ships sailing. This topic is the design of signal processing system of continuous wave system based on a navigation radar. This system can realize the rain clutter suppression, same frequency interference suppression function. Our radar technology lags behind abroad in the ship navigation radar products, but the rapid development of the market and the urgent demand of domestic can be applicable to small and medium-sized civil ship, need has the advantages of small volume, light weight, small radiation, high reliability, low cost and high resolution characteristics of marine navigation radar.This paper presents the design and implementation of marine navigation radar signal processing system of continuous wave, the wideband frequency modulation continuous wave system, in order to improve the range resolution, reduce blind range, reduce the radar radiation power, and the power consumption of the whole radar. A bistatic antenna, improve the transmit and receive signal isolation, reducing receiver noise coefficient. Random frequency hopping, same frequency interference suppression of multi radar.This paper discusses in detail and the main characteristics of continuous wave radar working principle, including the sawtooth frequency modulation and triangular frequency modulation. The radar has no range blind area, high range resolution, low radiation, high safety and operation characteristics of the high.Then introduce the composition block diagram and working principle of the whole, including continuous wave radar parameter setting function, display function and chart AIS target display function, accounting for distance, distance measurement error indicator. Focusing on the signal processing system software and the main functions of the process, elaborated on the same frequency interference suppression algorithm, and the design and implementation of new CFAR detection algorithm, improves the target detection probability of sea and river and other complex scenarios, effectively suppress the interference of the same frequency. Finally, from the radar function, performance and stability, to test the signal processing system design, a good result is obtained, fully meet the design requirements. |
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