A High-speed Indoor Wireless Communication System Employing an Anti-multipath Modulation Scheme

(1)高时延分辨率室内多径传播测量国产信道测深仪揭示了3GHz频段室内多径传播特性的机理。(2)室内多径传播分析考虑窗户穿透的影响，采用射线追踪方法进行了室内三维传播预测。结果显示了与实验结果相似的真实延迟分布。(3)对主动衰落产生方法的考虑根据以上结果，研究了保证最佳性能的主动衰落产生方法。所得到的方法是从位于房间中心的天线以轻微偏移同时传输信号。这是由研究者开发的图形模拟工具估计的。(4)误码率测量实验室实验装置的构建建立了主动衰落环境和频率选择性衰落环境下误码率测量的实验室实验系统。该系统保证了上述两种衰落环境的性能比较。(5)提高比特率的考虑在未来的工作中，为了达到100 Mb/s以上的传输速率，将考虑频分复用。

(1) Indoor multipath propagation measurement with high time delay resolutionA home-made channel sounder has revealed the mechanism of indoor multipath propagation characteristics in 3GHz band.(2) Analysis on indoor multipath propagationThree dimensional indoor propagation predictions by ray-tracing considering the effect of windows penetration were done. The results has shown a realistic delay profiles resembling the experimental results.(3) Consideration on generating method of Active fadingFrom above results, Active fading generating method has been investigated to ensure the best performance. The resulting method is the simultaneous transmission of signals from the antennas positioned at the center of the room with slight offset. This was estimated by a graphical simulation tool developped by investigator.(4) Construction of laboratory experimental setup for bit error rate measurementA laboratory experiment system was set up for bit error rate measurement under Active fading environment and frequency selective fading environment. This system ensures the performance comparison between above two fading environments.(5) Considerations on bit rate enhancementFor future work, to achieve more than a hundred Mb/s transmission rate, frequency division multiplexing will be considered.