非相干散射的一种非线性反演方法

Non-linear inversion algorithm for incoherent scattering

非相干散射是从自相关函数或其功率谱来反演电离层参数,线性反演利用国际参考电离层置初始值来进行反演,若初始值与真实值偏差较大,该方法精度较差。为了解决这个问题,提出了一种非线性反演算法。该算法不受初始值影响,反演的参数精度高,仿真结果表明,其相对误差的绝对值不大于5%。

Ionosphere parameters can be inversed from the autocorrelation function or its power spectrum in incoherent scattering. The initial values calculated from the International Reference Ionosphere are used in linear inversion. If the initial values are far from true values, the linear inversion will give the results at low accuracy. For solving this problem, a novel non-linear inversion algorithm is presented in the paper. The initial values have no effect on the estimated parameters in such algorithm and the results are very accurate. Simulation shows that the absolute values of the relative errors estimated using the proposed algorithm are less than 5 %.