Investigation on the error performance of multilink multihop cooperative wireless network

Abstract

In the recent years, usage of wireless application such as WiFi, newlineBluetooth device, cellular phone (smart phone) and sensor relay network newlineplays a vital role in our day to day life. Wireless network provided High data newlinerate when compared with conventional wireline network due to underlying newlinenetwork. Data communication plays an essential role in communicating the newlinenodes with high speed and they are in need of high data rate. In practice, newlinewireless channels are subjected to Fading, pathloss, Shadowing and Co newlinechannel Interferences and these entire features is greatly degrade the quality newlineof service. newlineThe major disadvantage in wireless communication is signal fading, newlinecaused due to long distance transmission over multipath propagation of the newlinesignal. Signal fading mainly occurs due to Scattering, Refraction, Reflection newlineand Absorption by the surrounding. This multipath propagation adds newlineconstructively or destructively in the signal level at the receiver s end and newlinemakes the signal amplitude to fluctuate randomly over time. When the newlinechannel is deeply fading, the wireless paths are totally disconnected so that newlineinformation cannot be delivered reliably. Diversity is the well known newlinetechnique to reduce the Channel Fading, capability of sending the same newlinesignals repeatedly over independent channels. Receiver can decode the source newlinesignal as long as they exist in the channel. Due to this multipath propagation newlineof the signal, multiple same copies of signals are received at the receiver as to newlinebe combined; this could be done only by Selection and Combining technique. newlineThis technique selects the best signal copies and all the copies are combined newlineand then decoded. newline