1. INTRODUCTION 1.1 General introduction: A wireless network is a flexible data communications system, which uses wireless media such as radio frequency technology to transmit and receive data over the air, minimizing the need for wired connections (What is Wireless LAN, White Paper). Wireless networks are used to augment rather than replace wired networks and are most commonly used to provide last few stages of connectivity between a mobile user and a wired network. Wireless networks use electromagnetic waves to communicate information from one point to another without relying on any physical connection. Radio waves are often referred to as radio carriers because they simply perform the function of delivering energy to a remote
Background A review of Fundamentals of Wireless Communication by David Tse and Pramod Viswanath shows that wireless communication technologies are one of the most varied area in the communication field and it has not slowed down since its study in the 1960s. Demand with regards to wireless connectivity due to mobile phones have only served to push the technological demands further. Starting from the famous demonstration of wireless telegraphy by Marconi in 1897, radio waves began travelling across the Atlantic Ocean in 1901, and it has now matured into the high
Microwaves are electromagnetic signals used in most wireless communication networks. Their wavelengths range from one meter to one millimetre; with frequencies between 300 MHz (100 cm) and 300 GHz (0.1 cm). 802.11 is a set of specifications developed by IEEE for Wireless Networks (WLAN – Warless Local Area Network). SAQ’s i. What are the basic building blocks of a communication system?
A wireless network is a computer network which uses wireless connections between network nodes. Wireless networking is a method by which homes, telecommunications networks and business installations avoid the costly process of introducing cables into a building, or as a connection between various equipment. Wireless telecommunication networks are generally implemented and administered using radio communication. This implementation takes place at the physical level (layer) of the OSI model network structure. Examples of wireless networks include cell phone networks, wireless local area networks (WLANs), wireless sensor networks, satellite communication networks, and terrestrial microwave networks.
People with also the get the advantage of advancement because since the Internet is practically the future, people will be forced to switch over from materialistic things to the web if they want to stay updated. Failing to use the phone would be reducing society back to cave man days. Even though these advantages seem beneficial, they are not fit for every individual. Many people unfortunately do not have the money to pay for the expenses that a cellular device requires. Depending where people live or where are located at the moment may not have access to Wi-Fi, which is the basis to access the web.
Therefore, data are being transmitted through huge region all over the world, which is wireless connection. Significantly, communication has different rules, which are known as protocols that should be followed by all devices connected to the network . Thus, cellular data is a type of wireless network, which is also known as mobile data, which could be used whenever the wireless connection lost. Cellular
1.1 Wireless communication There are various generation in the wireless system. We are running with the 4 G wireless system which is more focused on the high speed data communication. The demand for higher capacity with low error has raised manifolds, mainly due to cellular telephony although expected to be soon eclipsed by wireless data applications. The various digital signal processing algorithms like IFFT, FFT can be implemented with the advent of modern chip technology. Due to the success of 2G wireless communication standards especially CDMA technique it has been shown that communication ideas can be implemented in practice .
In Wireless networks nodes send information from one point to another by using electromagnetic waves without relying on any physical connection. The main benefit of mobile wireless networks is access to the application from anywhere and at anytime. The wireless network is preferred because the cost of wired network is expensive due to the high cost of Ethernet cables, hubs and switches. Wireless networks based on IEEE 802.11 allow seamless access to organization network. The most widely used wireless standard is IEEE 802.11b which is a moderate-range, moderate-speed technology.
CHAPTER-1 INTRODUCTION 1.1 Introduction of Wireless communication Pursuance for better ways of living has been instrumental in advancing human civilization. The communication services available at any time and place free people from the limitation of being attached to fixed devices. Nowadays, thanks to the remarkable progress in wireless technology, affordable wireless communication service has become a reality. Mobile phones hook people up whenever and wherever they want. Digital audio and video broadcasting offers consumers high-resolution, better-quality and even interactive programmers.