Coding, Modulation and Detection for Power-Efficient Low-Complexity Impulse-Radio Ultra-Wideband Transmissions Systems (CoMoDe IR-UWB)

脉冲无线电（IR）超宽带技术被广泛认为是未来低功耗、低复杂度的短距离数据传输系统的物理层。通过消除接收器上的信道估计，诸如差分传输参考（DTR） IR-UWB之类的IR-UWB变体能够进一步降低检测复杂性。然而，除非采用先进的接收器技术，如多符号差分检测，否则复杂性的降低是以显著降低功率效率为代价的。提出的项目是关于提高DTR IR-UWB系统的功率效率与复杂性之间的权衡。由于对于解调和信道解码的结合，软输出多符号检测器非常重要，因此项目的第一部分将研究针对DTR IR-UWB系统的具体情况生成软输出的球体解码器类型算法。软输出的质量以及所需的复杂性将是令人感兴趣的。在项目的第二部分，研究了IR-UWB多用户场景中的上行链路，重点研究了该多址方案的联合接收器。特别地，设计了联合执行多符号和多用户检测的算法。此外，还将研究接收机的扩展以处理窄带干扰。将评估具有可管理复杂性的接收器概念，以及信息理论对功率和带宽效率交换的基本限制。

Impulse radio (IR) UWB technology is widely considered as physical layer for future power-efficient and low-complexity short-range data transmission systems. By eliminating channel estimation at the receiver, variants of IR-UWB such as differential transmitted reference (DTR) IR-UWB have enabled further reductions of detection complexity. However, unless advanced receiver techniques such as multiple-symbol differential detection are employed, the complexity reduction comes at the cost of a dramatically reduced power efficiency. The proposed project is concerned with the enhancement of the powerefficiency- vs.-complexity tradeoff for DTR IR-UWB systems.Since for the combination of demodulation and channel decoding, soft-output multiple- symbol detector are of major importance, the first part of the project will investigate sphere-decoder-type algorithms generating soft output tailored to the specific situation of DTR IR-UWB systems. The quality of the soft output as well as the required complexity will be of interest. In the second part of the project, the up-link in an IR-UWB multiuser scenario is studied with focus on joint receivers for this multiple-access scheme.In particular, algorithms for jointly performing multiple-symbol and multi-user detector are to be designed. In addition, the extension of the receiver to also treat narrow-band interferer will be investigated. Receiver concepts with manageable complexity, as well as fundamental limits from information theory for the exchange of power and bandwidth efficiency will be assessed.