】软件无线电很有可能称为继模拟通信到数字通信和固定通信到移动通信之后的无线通信领域的第三次革命。本文综合论述了软件无线电的概念、研究现状，并讲解了其关键技术和难点以及应用和发展前景，最后对软件无线电研究中所应注意的问题提出了我们的看法 Software radios are likely to be called the third revolution in the area of ​​wireless communications from analog communications to digital communications and fixed communications to mobile communications. This paper discusses the concept of software radio, research status, and explain its key technologies and difficulties as well as the application and development prospects, and finally put forward our views on the issues that should be paid attention to in software and radio research