本文对目前已研制成的各种MTD方案及实现办法做了较全面的介绍,并比较了各种方案的优缺点。同时文中还提到了一些宜于用到MTD中的技术和方案,以进一步提高现有MTD的性能。 This article has made a variety of MTD programs and methods have been developed to achieve a more comprehensive introduction, and compared the advantages and disadvantages of various programs. In the meantime, some techniques and solutions that are suitable for use in MTD are also mentioned in the article to further improve the performance of the existing MTD.