Based on the characters of long rang underwater acoustic channels and MFSK modulation, a new Frequency GroupCoding (FGC) method is proposed in this paper.
本文针对远程水下信道和MFSK调制的特点，提出了一种新的频率分组编码(FGC)方法。
2
Design the material code in the network source database using groupcoding technology and show detail examples of resource index database and test questions database.
运用成组编码技术对资源库中的资源进行编码设计，并以资源索引库和考试试题库为例进行详细说明。
3
Aimed at the deficiency of groupcoding system currently used, a new flexible coding system is brought out and its vehicle analyzed and a method to show it with tree control put forth.