Development of Sub-nano second Indoor Radio Delay Profile Measurement Technique

亚纳秒室内无线电时延分布测量技术的研制

基本信息

批准号：
10650384
负责人：
TAKEUCHU Tsutomu
金额：
$ 1.98万
依托单位：
Kyoto Sangyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650384/
关键词：
mobile communicaitions multipath propagation Delay Profile sub-nanao second Indoor radio propagation Digital radio communication dalays 伝搬遅延特性無線LAN 遅延時間

项目摘要

This research work has been done for the realization of ultra high resolution delay measurement (sub-nano second) for indoor radio environment which enables the high speed access in wireless LAN. However it could not attain the measuring equipment due to the difficulties in designing the logic circuit for Maximal-length code generator. The researcher will continue the research work until the accomplishment of the measuring equipment and the measurement in indoor radio environment. During the research work, the possibility of the anti-symmetric M-sequence is revealed without the loss of amplitude dynamic range in correlation output.The digital radio link simulation in indoor radio environment will be one of a target of this research work. A wireless LAN system utilizing the delay robust modulation scheme PSK-RZ and an artificial time-varying fading, Active Fading, has been proposed by the researcher and its performance has been estimated by computer simulation. A newly installed parallel virtual machine, equipped with 32 Pentium II 450MHz CPU, enables the detailed computer simulation in the whole room with the size of 15×10×3m. The results show that the proposed method can attain the bit error rate less than 1×10ィイD1-5ィエD1 in the whole room whereas the conventional method cannot. This result is obtained by the computer simulation calculating the time-varying signals with time dispersion characteristics based on complex delay profiles computed by three dimensional ray-tracing radio propagation. The result of this work, such as fine delay characteristics of indoor radio environment, will be expected to improve the computer simulation by revealing the detailed mechanism of indoor radio propagation characteristics.

这项研究工作是为了实现超高分辨率延迟测量（Sub-nano second）的室内无线电环境，从而实现了无线LAN的高速访问。但是，由于难以设计最大长度代码生成器的逻辑电路，因此无法获得测量设备。研究人员将继续研究工作，直到完成测量设备和室内无线电环境中的测量。在研究工作期间，抗对称M序列的可能性在相关输出中没有放大器动态范围的损失。研究人员提出了利用延迟鲁棒调制方案PSK-RZ的无线LAN系统PSK-RZ和人为变化的褪色，主动褪色，并且通过计算机模拟估算了其性能。一款新安装的并行虚拟机，配备了32个Pentium II 450MHz CPU，可以在整个房间中详细的计算机仿真，大小为15×10×3m。结果表明，所提出的方法可以在整个房间中达到小于1×10×5 d1的位错误率，而常规方法不能。通过计算机仿真计算时间分散特征，该计算机模拟通过计算时间分散特征来获得该结果，该信号是根据由三维射线追踪无线电传播计算出的复杂延迟曲线的。这项工作的结果，例如室内无线电环境的良好延迟特征，可以通过揭示室内无线电传播特性的详细机制来改善计算机模拟。