Chapter 1. Introduction. 1.1 Background. Wireless Communication

1297 WordsMay 5, 20176 Pages
CHAPTER 1 INTRODUCTION 1.1 BACKGROUND Wireless communication is one of the most booming area in the field of communication technology .While past decades has shown surge improvement of research activities in the area. First there has been a rapid increase in cellular telephony. Second the advancement in VLSI technology which has proven the low power implementation of signal processing and coding techniques. Third the successful outcome of 2G (second generation) standards most widely used, IS-95 code division multiple (CDMA) standard, given a vast development in communication theory. But there are two areas in wireless communication which makes the communication most interesting and…show more content…
It tends to constructive or destructive interference. This is the major problem in wireless communication system. To overcome the problems of multipath propagation, fading and interference, many techniques are used to combat the effects of these problems. One of them is using by multiple antennas at both transmitter and receiver ends, and methods such as selective, switching and maximal combining techniques are used to improve wireless communication. To increase the performance of wireless communication many scholars have suggested to use MIMO technique that is multiple antennas at the transmitter as well as at the receiver and also suggested by them that If receiver provided with multiple received signal generated with the same coded data then it led to increase performance of wireless communication by increasing the channel quality. The following diversity techniques are used for this that is temporal diversity, frequency diversity and antenna diversity. The major problem is fading and interference which is combat by using different diversity techniques. The best diversity techniques can be selected by examine and comparing the different types of diversity techniques. Moreover, different diversity techniques can be combined and used in wireless communication systems to get the best result to mitigate fading problems. In chapter 2 there has been provided the description of wireless communication. In chapter 3 there is
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