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（CRLH）超材料（MM）组件（传输线，短管，混合耦合器，分频器/合流器等），最近显示出异常宽带的潜力，以及新型MM超指令天线；2)色散非线性传输线（NLTL）超短脉冲整形器，用于产生最高数据速率和高效的直接序列（DS）传输；3)基板集成电路（SIC）实现MM组件/天线，以降低成本并提高收发器的性能；4)数字信号处理（DSP）编码、多径/多系统缓解和信道容量优化。将实现并比较两种不同的UWB前端收发器：UWB多端口（UMP）前端，由于其非常灵活的架构，具有出色的软件定义无线电（SDR）潜力；UWB同差（UH）前端，由于更高的灵敏度，预计将显示更大的吞吐量。虽然UMP前端将主要用于正交频分复用（OFDM）型UWB（使用QPSK相位谱和至少500 MHz带宽），但UH收发器将基于直接序列（DS） UWB方法，其中高效MM UWB脉冲成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.