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The Physical Layer Aspects of Wireless Networks
Abstract
The modern era belongs to wireless communication systems. The cellular networks, which were originally designed for voice services, have now been upgraded to accommodate Internet services. Wi-Fi and Wi-Max systems have been explicitly developed for delivering data services over wireless channels. Just like wired systems, wireless systems also follow the layered architecture for developing or accessing various Internet services; still, there exist significant differences between the technologies used at various layers for the similar purpose. Special design requirements of physical layer due to distinct properties of wireless channel have caused these differences. Low bandwidth supported by the channel, poor equipment capabilities, et cetera, features require special attention in developing various Internet services intended to be accessed by wireless devices. This chapter addresses various aspects of the physical layer of a wireless channel for developing a basic understanding of the problems, existing solutions, and proposals for future networks.
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