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。
