Performance evaluation of lte Advanced winner model with ofdm System using various types of relay Environment

Abstract

In recent years, there have been a lot of developments in the newlineelectronic computing devices and technology trends. These devices are untethered newlinewith no physical wire attachment. LANs (Local Area Networks) in newlinelegacy buildings and Personal Digital Assistant (PDA) are fine examples of newlinethis. They require more computing power in smaller devices and come with newlineflat, lightweight displays that require low power consumption. It also has user newlineinterfaces suitable for small dimensions. They come with higher bandwidths newlineand use multiple wireless interfaces such as wireless LANs, wireless WANs, newlinehome RF, Bluetooth etc. It is small, cheap, portable, replaceable and more newlineimportantly, usable. These electronic devices are also aware of their newlineenvironment and adapt accordingly. This is usually termed as location newlineawareness . They also recognize the location of the user and react newlineappropriately (e.g., call forwarding, fax forwarding). newlineCommunication over wireless channels suffers from multi-path newlinepropagation. Multi-path channels are usually frequency-selective. OFDM newlinesupports high data rate communication over frequency selective channels. newlineMulti-path communication results from reflection, diffraction, and scattering newlineof environment surroundings. In mobile communication technology, all these newlineaspects have been observed over the last two decades. The mobile broadband newlineis as important as internet. Users expectations of wireless technology have newlinebeen studied and it is clear that users expect good broadband access newlineeverywhere, be it home, office, train, aeroplane, canteen or during the break. newline