Strategies for highly efficient UWB impulse radio systems architectures

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Since UWB devices operate in the power-limited regime, the channel capacity increases linearly with the signal to noise ratio at the receiver. Thus highly efficient receivers are an essential prerequisite for the realisation of ultra high-speed data transmission. On the other hand the UWB channel requires completely new strategies for signalling and coding compared to conventional narrowband transmission. While most of the information theoretic work considers the physical channel, the constraints from real hardware are virtually always disregarded. In this project impulse radio systems will be investigated considering the real characteristics of the employed radio frequency hardware. These investigations will be carried out from two different points of view: On one side dedicated simulation techniques will be developed to allow for realistic modelling of real components over the entire bandwidth of UWB applications. On the other side information theoretic methods will be applied for a comprehensive system description. Both approaches will be fused to one common system model that serves as a simulation tool for a complete UWB transmission system including transmitter, receiver, antennas, and channel characteristics. An iterative investigation and optimisation process of the system model will be performed, in which simulation methods and information theoretic analysis will benefit significantly from an exchange of information. The consideration of the non-ideal hardware characteristics in the optimisation process will lead to a highly efficient UWB communication system.