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应用建立在维纳最小均方差准则下的最佳线性滤波器,可从二个输入信号分量中抽取出彼此相关的部份。在这种情况下,通过物理选择,可以将信号看成由二部份组成,一为信号及噪声混杂在一起的力量;另一为仅仅是信号(或噪声),常称之为参考分量。这里,我们讨论由非相干散时雷达获取的电离层下层高度上的离子速度V_I及同一时刻地面磁微脉动H分量变化这二个信号分量。地球物理研究的目的就在于,通过对信号过程的处理,找出二者之间在ULF频段范围内的相关联系,从而为研究磁流波从高空到地面的传播过程和机制提供依据。值得指出的是,这种滤波器的有效运用也依赖于对信号的了解,及其它地球物理先
Applying the best linear filter built on the Wiener minimum mean square error criterion, the relevant parts of each of the two input signal components can be extracted. In this case, through physical selection, the signal can be considered as two components, one is the power of signal and noise mixed together; the other is only the signal (or noise), often referred to as the reference component. Here, we discuss the two signal components of the ion velocity V_I at the lower ionosphere obtained by the incoherent SAR radar and the change of the H component at the same time. The purpose of geophysical research is to find out the correlation between the two in the ULF frequency range by processing the signal process, so as to provide basis for studying the propagation process and mechanism of the magnetic wave from high altitude to the ground. It is worth pointing out that the effective use of this filter also depends on the signal to understand, and other geophysical first