Novel Ultra Wideband (UWB) Front-End transceiver systems

该项目将基于以下概念和方法开发创新的超宽带（UWB）前端收发器系统：1）新型复合右/左手（CRLH）超材料（MM）组件（传输线，短截线，混合耦合器，分配器/组合器等），其最近已经显示出对于特别宽的带宽和新颖的MM超定向天线的潜力; 2）用于产生最高数据速率和有效的直接序列（DS）传输的色散非线性传输线（NLTL）超短脉冲整形器; 3）MM组件/天线的衬底集成电路（SIC）实现，用于降低成本和增强收发器的性能; 4）数字信号处理（DSP）编码、多径/多系统抑制和信道容量优化。两种不同的UWB前端收发器将实现和比较：UWB多端口（UMP）前端，具有良好的潜力，软件定义无线电（SDR），由于其非常灵活的架构，和UWB零差（UH）前端，预计将表现出更大的吞吐量，由于更高的灵敏度。虽然UMP前端将主要被设想用于正交频分复用（OFDM）类型的UWB（使用QPSK相位谱和至少500 MHz带宽），但是UH收发器将基于直接序列（DS）UWB方法，其中，高效MM UWB脉冲整形器的集成将是至关重要的。该项目对培养不同层次的研究生具有重要意义，研究成果将转移给我们的工业合作伙伴进行进一步的商业开发。

This project will develop innovative Ultra Wideband (UWB) front-end transceiver systems based on the following concepts and approaches: 1) novel composite right/left-handed (CRLH) metamaterial (MM) components (transmission lines, stubs, hybrid couplers, dividers/combiners, etc.), which have been recently shown to exhibit a potential for exceptionally broad bandwidth, and novel MM super-directive antennas; 2) dispersive nonlinear transmission line (NLTL) ultra-short pulse shapers for the generation of highest data-rates and efficient direct-sequence (DS) transmission; 3) substrate integrated circuit (SIC) implementation of MM components/antennas for reduction of cost and enhancement of performances of the transceiver; 4) digital signal processing (DSP) coding, multipath/mutlisystem mitigation and channel capacity optimization. Two different UWB front-end transceivers will be realized and compared: an UWB multiport (UMP) front-end, with excellent potential for software defined radio (SDR) due to its very flexible architecture, and an UWB homodyne (UH) front-end, which is expected to exhibit larger throughputs due to higher sensitivity. While the UMP front-end will be mainly conceived for Orthogonal Frequency Division Multiplexing (OFDM) type UWB (using QPSK phase spectra and at least 500 MHz bandwidth), the UH transceiver will be based on the Direct Sequence (DS) UWB approach, in which the integration of an efficient MM UWB pulse shaper will be of paramount importance. This project is of significant importance to the training of graduate students at different level and the outcome of the research will be transferred to our industrial partner for further commercial development.