A Wind Profiler Radar Pulse Emission Coding Method Using Non-Uniform Fractal Technology

Abstract

The invention discloses a wind profile radar pulse emission coding method adopting a non-uniform fractal technology, and belongs to the technical field of radar measurement. The wind profile radar pulse emission coding method adopting the non-uniform fractal technology comprises the following steps: 1, a power pulse strategy of wind profile radar emission non-uniform intervals is formulated, and the strategy is determined through using an exhaustion technology to determine a pulse emission strategy under a low mode, determining a pulse emission strategy in a high mode by adopting an optimization search technology, and searching an optimal pulse emission combination by adopting a simulated annealing technology; and 2, transmitting power pulses with non-uniform intervals according to the strategy determined in step 1. The method has the following beneficial effects: the distance resolution measured by a phase-coded radar can be improved while the narrow transmitting bandwidth is kept.

Description

technical field [0001] The invention relates to the technical field of radar measurement, in particular to a wind profile radar pulse emission encoding method using non-uniform fractal technology. Background technique [0002] Wind profiler radar measures atmospheric turbulence and obtains wind speed and wind direction. It is a very powerful detection tool and plays an important role in weather forecasting. When a network of multiple wind profiler radars operates cooperatively, it will play a greater role. my country is building a wind profiler radar network. According to Resolution COM5-5 of the World Radiocommunication Conference 1997 and footnotes S5.162A and S5.291A, the frequency bands allocated for use by wind profiler radars are: 46-68 MHz; 440-450 MHz; 470-494 MHz; 904 -928 MHz; 1270-1295 MHz; 1300-1375 MHz. The working frequency bands of wind profiler radar determined by China Meteorological Administration are 1270-1295 MHz and 1300-1375 MHz. [0003] Generally ...

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Problems solved by technology

[0004] Some methods have been proposed internationally to improve the distance resolution when transmitting wide pulses, mainly using linear statistics to invert and estimate the distance in the amplitude domain and the analysis method of Doppler expansion targets, but for diffuse targets such as atmospheric turbulence not applicable

Some people use frequency domain interferometry (FDI) to improve the distance resolution of wind profiler radar, but this method requires that the scattering target itself is a very thin layer when it is in the radar scattering volume, and it is difficult to meet the wind shear detection requirements of wind profiler radar. needs

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