一种实用的高频雷达反向散射方向谱估计方法的发展

N. Hashimoto, Lukijanto, Masaru Yamashiro, S. Kojima
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引用次数: 3

摘要

为了开发一种从高频雷达海回波多普勒频谱中估计定向波谱的实用方法,对桥本和德田(1998)提出的贝叶斯方法进行了修正和改进。在该方法中,方向谱的公式以指数函数为特征,其幂在方向范围内由傅里叶级数表示,同时假定它是频率范围内的分段常数函数。通过数值模拟对该方法进行了验证,并对其有效性进行了讨论。结果表明,该方法在实际应用中具有占用内存少、计算时间短的优点。
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Development of a practical method for estimating directional spectrum from HF radar backscatter
For the purpose of developing a practical method for estimating directional wave spectrum from HF radar sea-echo Doppler spectrum, a Bayesian method proposed by Hashimoto and Tokuda (1998) is modified and improved. In the method, a formulation of directional spectrum is characterized by an exponential function having the power expressed by a Fourier series over the directional range, while being assumed to be a piecewise-constant function over the frequency range. The method is examined using numerical simulation, with its validity being discussed. The result shows that the method has advantage in that it requires less memory and shorter computation time in practical applications.
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