LOF Lowest Observable Frequency是什么意思

用法例句

Calculation of the lowest useable frequency for long distance HF communication;

远距离短波通信最低可用频率的计算

In order to improve time-frequency resolution, this paper has made a research on how to construct a family of optimum time-frequency resolution(OPTFR.

本文重点研究了如何构造最优时频分辨率多小波,使其优良的时频特性得到充分发挥。