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随着移动通信系统的不断发展,一大批能够提高数据速率同时能效较高的新技术被开发出来,它们使高速率移动通信成为可能。本文中讨论了两种不同调制方案,这两种调制方案属于不同的通信方式,但是这两种调制方式的系统结构具有相同点,它们都用一个索引作为信息的一个附加部分。第一种方案是众所周知的空间调制技术,第二章方案是码索引调制技术。在本文中介绍了这两张调制方案并且讨论了每个方案相关的一系列挑战。
With the continuous development of mobile communication system, a large number of new technologies that can improve data rate and improve energy efficiency have been developed, which make high-rate mobile communication possible. Two different modulation schemes are discussed in this paper, and the two modulation schemes belong to different communication modes. However, the system structures of the two modulation modes have the same structure. Each uses an index as an additional part of the information. The first scheme is the well-known spatial modulation technique. The second scheme is the code index modulation technique. The two modulation schemes are introduced in this article and the series of challenges associated with each scheme are discussed.