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Energy and Bandwidth Efficiency in Wireless Networks

In this talk we consider the bandwidth efficiency and energy efficiency of wireless ad hoc networks.  Energy consumption of the receiver necessary to process each coded bit is considered as well as the effect of a nonideal transmit amplifier.  The relation between end-to-end bandwidth efficiency and energy use is determined for a dense network. A single measure of network performance called the transport efficiency is defined that measures the amount of information successfully delivered to the destination per unit energy.  The transport efficiency is optimized over the amplifier operation, error control codes used as well as the routing algorithm.  For various propagation models we show that the transport efficiency decreases inversely with end-to-end distance while for the case of spatial reuse the transport efficiency approaches a floor.