软华交互式电子手册系统Manual）是上海软华网络信息有限公司推出的一套集资料编辑、图库管理、内容管理、出版管理以及交互式阅读于一体的软件平台。产品功能全面，安全可靠，方便易用，性能稳定.-China Interactive Electronic Manual Soft Systems Manual) is a Chinese Network Information Co., Ltd. Shanghai soft launch of a set of data editing, library

Coded modulation (CM) is the combination of forward error correction (FEC) and multilevel constellations. Coherent optical communication systems result in a four-dimensional (4D) signal space, which naturally leads to 4D-CM transceivers. A pr