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本文讨论了AM、SSB和FM等模拟调制解调方式的软件实现问题。首先从软件无线电的概念、组成及特征和现有军用电台的主要调制方式出发，阐明了软件无线电应具有AM、SSB和FM等功能的思想，说明了用软件实现AM、SSB和FM必要性。其次简述了这三种模拟调制方式的原理，重点论述了它们的软件实现方法，进行了必要的理论分析，提出了在实际实现时应注意的几点建议。最后以AM为例给出了计算机模拟结果，证明了本文采用的方法可行。
This article discusses the software implementation of analog modulation and demodulation methods such as AM, SSB, and FM. First of all, starting from the concept, composition and characteristics of software radio and the main modulation methods of existing military radio stations, the idea that software radio should have such functions as AM, SSB and FM is demonstrated. The necessity of implementing AM, SSB and FM in software is illustrated. Secondly, the principle of these three kinds of analog modulation methods is briefly described, and their software implementation methods are mainly discussed. The necessary theoretical analysis is made, and some suggestions that should be paid attention to are put forward. Finally, taking the AM as an example, the computer simulation results are given, which proves that the method adopted in this paper is feasible.