本文介绍了一种采用非正交扩频的数字指纹技术。首先简单介绍了数字指纹技术的应用及传统的数字指纹技术。然后介绍了非正交扩频数字指纹系统的各组成部分、关键技术、优越性，以及这一研究方向中尚待解决的问题。

This paper introduces a digital fingerprinting system based on multicarrier non-orthogonal spread spectrum. Firstly,the application of digital fingerprinting and traditional techniques are briefly introduced, followed by descriptions of the different parts, key technologies and advantages of the non-orthogonal spread spectrum digital fingerprinting system. Finally, some open issues in this field are discussed.