一種新的K分布形狀參數(shù)估計(jì)器
A New Estimator for Estimating the Parameters of K-Distribution
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摘要: 該文提出了一種將已有的U估計(jì)器和X估計(jì)器結(jié)合起來估計(jì)K分布形狀參數(shù)的新估計(jì)器。仿真結(jié)果表明，與以前提出的方法相比，新估計(jì)器在我們所關(guān)心的小v值范圍能夠提供更加準(zhǔn)確的形狀參數(shù)估計(jì)，幾乎相當(dāng)于通過數(shù)值方法計(jì)算的最大似然估計(jì)器的性能。
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關(guān)鍵詞:
- K分布;形狀參數(shù);估計(jì)器
Abstract: This paper proposes a new estimator for estimating the parameters of K-distribution which combines U estimator with X estimator efficiently. Simulations show that this new estimator yields shape parameter estimates with lower variance when compared with previous estimators. Parameter estimates obtained from new estimator are approximately equal to the numerically evaluated Maximum Likelihood（ML） estimates when v is low. -
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