The analyses on indoor wireless environments and the transmission performance of giga-bit wireless LAN

室内无线环境及千兆无线局域网传输性能分析

• 批准号: 15560342
• 负责人: TAKEUCHI Tsutomu
• 金额: $ 2.37万
• 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: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560342/
• 关键词: wireless LAN; UWB; channel sounder; multipath propagation; OFDM; mobile communication; giga-bit

This research work has been done for the realization of Giga-bit/s wireless LAN by both analyses on wireless propagation and communication system. Following results were obtained.1. Indoor wireless propagation measurements and wireless LAN simulatorIndoor wireless propagation measurements have been done by using the ultra wide-band channel sounder with newly added DOA measuring function. It found many strong specular rays caused by the metallic objects and so many weak scattering rays. By utilizing the measured delay profiles, the indoor propagation channel simulator has been studied and used for the performance investigation of MIMO diversity system. The diversity system showed the performance improvement even in the static environment.2. Studies on Giga-bit/s communication system for wireless LANA simple channel performance estimation method based on the viterbi decoding metrics has been proposed and evaluated by computer simulations with the valuable results. Based on this new chann … More el estimation method, two basic adaptive rate communication systems have been studied. The first one with adaptive modulation schemes has realized a fast average transmission rate with complex hardware architecture, however, the second one with adaptive frequency diversity branch number system has obtained a relatively small scale hardware with small loss of performance.In the next, a high-precision time-delay difference estimation method based on the in-phase channel distortion detector has been proposed and studied. And its application to the adaptive variable guard-interval (GI) OFDM system has been studied. The simulation result showed that the system has realized the high transmission performance and efficiency compared with conventional fixed GI system.And furthermore, a MEMO-OFDM system utilizing the sub-carrier channel orthogonal property has been studied to show its system simplicity and the comparable transmission performance compared with conventional space-time coding MIMO system. The proposed system is expected to cut the power consumption in big amount. Less

本文通过对无线传播和通信系统的分析，为千兆位/S无线局域网的实现做了研究工作。取得了以下研究结果：1.室内无线传播测量和无线局域网模拟器利用新增了DOA测量功能的超宽带测深仪进行了室内无线传播测量。它发现了许多由金属物体引起的强镜面反射光线和如此多的弱散射光线。利用测量的时延分布，对室内传播信道模拟器进行了研究，并将其用于MIMO分集系统的性能研究。结果表明：1.即使在静态环境下，分集系统也表现出了性能的提升。无线局域网千兆/S通信系统的研究提出了一种基于维特比译码度量的简单的信道性能估计方法，并通过计算机仿真进行了评估，得到了有价值的结果。基于这个新的Chann…研究了两种基本的自适应速率通信系统的EL估计方法。前者硬件结构复杂，平均传输速率快，而后者硬件规模较小，性能损失较小。其次，提出并研究了一种基于同相信道失真检测器的高精度时延差估计方法。并对其在自适应变保护间隔(GI)系统中的应用进行了研究。仿真结果表明，与传统的固定GI系统相比，该系统实现了更高的传输性能和更高的传输效率。此外，利用子载波信道的正交性对Memo-ofdm系统进行了研究，表明其系统简单，传输性能与传统的空时编码MIMO系统相当。所提出的系统有望大幅降低电力消耗。较少

项目成果

Ultra Wide Band Channel Sounding for Indoor Wireless Propagation Environments

适用于室内无线传播环境的超宽带信道探测

• 发表时间: 2003
• 期刊: Proceedings of 2003 IEEE Topical Conference on Wireless communication Technology and NSF Wireless Grantees Workshop
• 作者: 周 虹;Hong Zhou;Tsutomu Takeuchi
• 通讯作者: Tsutomu Takeuchi

Neutral Network for Linear Distortion Compensation in Digital Communications

数字通信中线性失真补偿的神经网络

• 发表时间: 2003
• 期刊: Proceedings of Seventh International Symposium on Signal Processing and Its Applications
• 作者: 伊藤博礼;矢守恭子;田中良明;Hong ZHOU
• 通讯作者: Hong ZHOU

矢野 雄士: "適応伝送速度DAPSK-COFDM移動通信システムに関する一検討"2004年電子情報通信学会総合大会予稿集. B-5-57. (2004)

Yuji Yano：“自适应传输速率 DAPSK-COFDM 移动通信系统的研究”2004 年 IEICE 大会论文集 (2004)。

Neural Network for Linear Distortion Compensation in Digital Communications

用于数字通信中线性失真补偿的神经网络

• 发表时间: 2003
• 期刊: Proceedings of Seventh International Symposium on Signal Processing and Its Applications
• 作者: 周 虹;Hong Zhou;Tsutomu Takeuchi;Hong ZHOU
• 通讯作者: Hong ZHOU

Hong ZHOU: "Neural Network for Linear Distortion Compensation in Digital Communications"Proceedings of Seventh International Symposium on Signal Processing and Its Applications. 297-300 (2003)

周宏：“数字通信中线性失真补偿的神经网络”第七届国际信号处理及其应用研讨会论文集。