二维等比数阵：geometrical numerical matrix for two dimension 二次调制信号：Multi-modulation signal 二维安装技术：2 dimensions mounting technology ..
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At the same time, it introduces the definition of spatial distance, and establishes a multi-point to one point optimal signal detection theory according to the relationship of modulation mapping.
同时引入空间距离的概念，根据调制映射关系，建立起多对一的最优信号检测理论。
In Chapter 8, Active functions of DFBPE output and equalization algorithm are modified for the adaptive equalization of multi-level modulation signal.
第八章对判决反馈BP网络均衡器输出的激活函数及算法进行了改进，使算法能够有效地应用于多电平调制信号的自适应均衡。
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