An Overview of Diversity Techniques in Wireless Communication Systems

Fading problem is a major impairment of the wireless communication channel. In this paper we considers different techniques to mitigate the fading problem in wireless channel. The trivial solution for the fading problem would be to add a fading margin at the transmitter. However, this is not an efficient solution at all. One alternate solution is to take advantage of the statistical behavior of the fading channel. Here comes the basic concept of diversity; where two or more inputs at the receiver are used to get uncorrelated signals. Keywords—Diversity, fading.