Strategies for highly efficient UWB impulse radio systems architectures

由于UWB设备在功率限制的情况下工作，信道容量随接收机的信噪比线性增加。因此，高效的接收机是实现超高速数据传输的必要前提。另一方面，与传统的窄带传输相比，超宽带信道需要全新的信令和编码策略。当大多数信息理论工作考虑物理通道时，来自实际硬件的约束几乎总是被忽略。在这个项目中，脉冲无线电系统将考虑所使用的射频硬件的真实特性进行研究。这些研究将从两个不同的角度进行：一方面，将开发专门的仿真技术，以便在UWB应用的整个带宽上对真实组件进行逼真的建模。另一方面，将应用信息论方法对系统进行全面的描述。这两种方法将融合到一个共同的系统模型中，作为一个完整的UWB传输系统的仿真工具，包括发射器、接收器、天线和信道特性。将执行系统模型的迭代调查和优化过程，其中仿真方法和信息论分析将从信息交换中显著受益。在优化过程中考虑到非理想的硬件特性，将导致一个高效的超宽带通信系统。

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.