基于短时移及码复用的非相干超宽带通信技术研究

项目名称： 基于短时移及码复用的非相干超宽带通信技术研究

项目编号： No.61271262

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 梁中华

作者单位： 长安大学

项目金额： 70万元

中文摘要： 非相干超宽带（UWB）系统由于具有低采样率、低复杂度等特点在中、低码率场合备受关注。发射参考（TR）系统即是一种具有竞争力的非相干UWB备选方案。然而传统TR系统的延迟线过长难以实现。目前为了克服这一缺陷所采用的时移、频移或码移的一维改进方法仅适用于较低码率场合。为了支持包括中等码率在内的多种速率传输，本项目在改进的一维时移TR基础上，吸收码移思路，研究基于短时移（STS）及码复用（CM）的两维联合传输技术以增加信息传输容量。研究内容包括：基于STS-CM的两维TR信号设计；最佳正交码的搜索及其参数选择；基于STS-CM的自相关检测算法；STS-CM系统的误码性能分析等。预期在STS-CM非相干UWB通信系统的构建、性能评估及理论分析等方面获得突破或显著进展。研究结果对于实现低成本、低功耗及低复杂度的无线个域网、无线传感器网及物联网物理层非相干传输技术的标准化、产业化具有重要意义。

中文关键词： 超宽带；非相干；发射参考；短时移；码复用

英文摘要： Due to their relaxed requirement at sampling rate and low-complexity, noncoherent (NC) ultra-wideband (UWB) systems have been attractive to the applications of low and medium date rates. Among them transmitted reference (TR) technique is known as a competitive candidate scheme. However, a big issue with traditional TR systems is the difficulty of integrating UWB delay lines on silicon and thus overlong analog delay lines seem infeasible. To address this issue, there have been one-dimensional improved TR schemes using time shifted, frequency shifted and code shifted/code multiplexed signaling, respectively. Nevertheless, it is difficult for these one-dimensional improved systems to support higher data rates specified in the IEEE 802.15.4a standard. Therefore, in order to increase the transmission capacity and support various scenarios ranged from low to medium date rates, our project investigates a joint time-code transmission scheme using short-time shifted and code multiplexed (STS-CM) signaling, which is the combination of our previous time shifted version and the code multiplexed scheme. Our research focuses on the following aspects: a) Design of STS-CM based two-dimensional TR signaling; b) Search of optimum orthogonal code sequences and selection of related parameters; c) Autocorrelation receivers (AcR) for

英文关键词： Ultra-wideband (UWB)；Noncoherent (NC)；Transmitted Reference (TR)；Short-Time Shifted (STS)；Code Multiplexed (CM)