Switching techniques have been first proposed as a spacial diversity techniques. These
techniques have been shown to reduce considerably the processing load while letting
multi-antenna systems achieve a specific target performance. In this thesis, we take
a different look at the switching schemes by implementing them for different other
wireless applications. More specifically, this thesis consists of three main parts, where
the first part considers a multiuser environment and an adaptive scheduling algorithm
based on the switching with post-selection scheme for statistically independent but
non-identically distributed channel conditions. The performance of this switched
based scheduler is investigated and a multitude of performance metrics are presented.
In a second part, we propose and analyze the performance of three switched-based
algorithms for interference reduction in the downlink of over-loaded femtocells. For
instance, performance metrics are derived in closed-form and these metrics are used
to compare these three proposed schemes. Finally in a third part, a switch based
opportunistic channel access scheme is proposed for a cognitive radio system and its
performance is analyzed in terms of two new proposed metrics namely the average
cognitive radio access and the waiting time duration.
| Date of Award | May 2012 |
|---|
| Original language | English (US) |
|---|
| Awarding Institution | - Biological, Environmental Sciences and Engineering
|
|---|
| Supervisor | Mohamed-Slim Alouini (Supervisor) |
|---|