This book includes the majority of the methods developed over the last two decades. The algorithms are systematically classified to five major categories: likelihood-based classifiers, distribution test-based classifiers, feature-based classifiers, machine learning-assisted classifiers, and blind modulation classifiers. For each type of automatic modulation classifier, the assumptions and system requirements are listed, and the design and implementation are explained through mathematical expressions, graphical illustrations and programming pseudo codes. Performance comparisons among several automatic modulation classifiers from each category are presented with both theoretical analysis and simulated numerical experiments.

OFDM是3G向4G的一个突破性的改变，虽然现在5G风生水起，但是通信领域人都知道，由于香农公式的限制，5G其实本质而言和4G相差不大，无非就是天线数变多了，带宽变宽了，变了变帧结构，映射方式相比4G增加了256QAM，因而峰值速率翻了好多！！所以，要入手通信，还是得从4G开始，所以OFDM是基础，希望大家有所提高，欢迎私信！！！