Performance limits and design issues in wireless networks

摘要: The increasing utilization of networks, especially wireless for different applications and in aspects modern life, has directed a great deal attention towards the analysis optimal design networks. Distinguishing features environment distributed nature network setup have raised many important challenges finding performance limits tasks such as communication, control, computation over There are also issues concerning complexity robustness systems that should be addressed thorough understanding an efficient operation networked systems. This thesis deals with few associated fundamental networks. In first part, we analyze two special class networks called erasure These incorporate some essential environment. We look at these application is data transmission traffic patterns, namely multicast broadcast. capacity region coding scheme scenario found, outer inner bounds on broadcast provided. second considered this estimation control dynamical process remote location connected through to sensor observing process. In case, characterize minimum steady-state error its dependency parameters network. final problem part concerns power consumption (as measure) propose simple based idea beamforming saves us terms dense ad-hoc quantify gain compared case when nodes isolated communications without participating network. The downlink cellular issue related quality service provisioning scenario. investigate differentiated rate scheduling which users demand sets rates. obtain explicit practical schemes achieve constraints same time maximize throughput. opportunistic beamforming, simple, require little amount feedback transmitter. further show throughput loss due imposing negligible large systems. The next multiple antenna Gaussian channels channel transmitter users. mathematical models provide bound equivalent dual access noise covariance depends transmit powers. duality explored effect sum-rate number regime. Finally, training-based block fading proposed.