This thesis contributes the research and development of novel receiver optimization approaches conducted in ultra-wide bandwidth (UWB) systems. The ultimate goal of the improved receiver technology is to simplify the receiver structures at the cost of a tolerable performance degradation or improve the receiver performances at the cost of a tolerable complexity. Recently, UWB technology has become more and more attractive due to its increased performance. An advanced scheme that can provide a further improvement is strongly recommended and highly demanded. This research project focuses on the design of outstanding receivers suitable for the UWB system with transmitted-reference signaling. Two types of improved receivers are investigated. The first one is based on the optimization of inter-pulse time delay Td in the traditional transmitted-reference receivers where one data pulse is transmitted Td seconds delay after one reference pulse in a bit duration. The second one is based on the joint optimization of the number of reference symbols and the integration interval length in the generalized transmitted-reference receivers where Nd data symbols are transmitted after Nr reference symbols in a data packet. For both improved receivers, simulation and theoretical approaches are used to provide the optimization results. The numerical results show that the improved receivers by using different optimization approaches outperform the non-improved receivers significantly for most practical cases. An up to 4.2dB performance improvement can be achieved consequently. The principal conclusion from this thesis is that all the optimization schemes presented herein can be successfully applied to the design of receivers in the UWB transmitted-reference systems that the data decision can be obtained by thresholding the correlator output of the reference information with the data information.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:560111 |
| Date | January 2011 |
| Creators | Wang, Shuyi |
| Publisher | University of Warwick |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://wrap.warwick.ac.uk/45884/ |
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