A new modulation principle for incoherent scatter measurements
A new modulation principle for incoherent scatter measurements
复制标题
用于非相干散射测量的新调制原理
DOI：
10.1029/rs022i004p00625
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发表时间：
1987
期刊：
影响因子：
1.6
通讯作者：
I. Häggström
中科院分区：
文献类型：
--
作者：
M. Lehtinen;I. Häggström
本文介绍了一种用非相干散射雷达测量电离层等离子体自相关函数的新方法。该方法可用于以前使用多脉冲方法的类似情况。在发射信号的设计受最大允许调制时间和最大雷达峰值功率限制以及信噪比小的情况下，该方法提供了比通过频率换向多脉冲测量获得的ACF估计更精确的ACF估计。给出了该方法的简单解释，以及基于模糊函数的精确定义。计算算法进行了讨论，它表明，有几种可能性修改现有的算法，使这种方法可以实现。
A new method for measuring the ionosphere plasma autocorrelation function with an incoherent scatter radar is described. This method can be used in similar situations where multipulse methods have been used previously. In situations where the design of the transmitted signal is limited by a maximum allowed modulation time and a maximum radar peak power and where the signal to noise ratio is small, this method provides significantly more accurate ACF estimates than can be obtained by frequency commutated multiple pulse measurements. A simple explanation of the method is given, as well as a precise definition based on ambiguity functions. Computational algorithms are discussed, and it is shown that there are several possibilities to modify present algorithms so that this method can be implemented.