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本文介绍针对任意调制状态数及任意星座结构的M-QAM大容量数字微波通信系统借助微型计算机通用分析、模拟其系统性能的基本方法与有关结果。这是国家“七五”重点攻关项目“6GH_z 1920路大容量数字微波通信系统”软件研制开发的重要成果之一。在此介绍的计算方法既具通用性,亦有高的计算效率与计算精度,特别适宜在微型计算机上操作运行。借助这一计算方法的计算模型可涉及单一干扰/多重干扰等一般同波道、邻波道干扰效应,线性或非线性传输码间干扰引起的影响,以及多类传输环节非理想引起的固定传输恶化效应,包括预测频率选择性多径衰落传输条件下各种类型自适应对抗技术的性能改善状况。
This paper introduces the basic methods and related results of M-QAM high-capacity digital microwave communication system with arbitrary number of modulation states and arbitrary constellation structure. This is one of the important achievements made by the state in the “Seventh Five-Year Plan” key research project “6GH_z 1920 Road High-Capacity Digital Microwave Communication System” software research and development. The calculation method introduced here is not only versatile, but also has high computational efficiency and computational accuracy, and is particularly suitable for operation on a microcomputer. The calculation model with this calculation method can involve general co-channel interference such as single interference / multiple interference, the effect of adjacent channel interference, the influence caused by interference between linear or non-linear transmission codes, and the fixed transmission due to non-ideal transmission in various types of transmission links Deteriorating effects include predictions of performance improvement for various types of adaptive countermeasures under frequency-selective multipath fading transmissions.