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Study on Reliable Low-power Wireless Communication Systems Using Multiband Pulsed UWB Technlogy

采用多频带脉冲UWB技术的可靠低功耗无线通信系统研究

基本信息

批准号：
22560366
负责人：
SASAKI Shigenobu
金额：
$ 1.83万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2010
资助国家：
日本
起止时间：
2010 至 2012
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560366/
关键词：
UWB 信頼性パケット伝送同期高信頼伝送同期補足同期捕捉

项目摘要

The goal of this project is developing reliable low-power wireless communications by using multiband pulsed ultra wide band (UWB) technology. In this project, the following topics are investigated.First, the performance of direct sequence ultra wide band (DS/UWB) systems is evaluated under the multipath fading environment from the viewpoint of ensuring a certain level of error rate performance by using cumulative distribution function (CDF) of bit error rate.Second, performance of cooperative communications for DS/UWB in multipath channel is investigated. According to the computer simulation results, it is found that use of cooperative communications is effective to improve the performance in non line-of-sight multipath channel comparing with the use of conventional diversity reception in DS/UWB.Third topic is the acquisition performance DS/UWB communication systems, especially in packet communications. In wireless packet transmission, the acquisition must be completed in the preamble duration in the packet. In this project, RAKE combining and verification mode is employed in DS/UWB packet transmission to combat multipath fading. According to the simulation results under the IEEE802.15.4a multipath fading environment, significant improvement of acquisition probability is achieved by using RAKE combining. Also, mean acquisition time becomes shorter when the verification mode is equipped with the DS/UWB acquisition system. Also, using peak detector and interval estimation is proposed to achieve faster and more accurate acquisition in multipath fading environment. Computer simulation results show that the peak detection and interval estimation is effective to capture the accurate peak of the matched filter output in the DS/UWB acquisition. In addition, thereduction of the acquisition time is achievable by optimal design of the capturing interval for the peak detection.

本计画的目标是利用多频带脉冲超宽频技术发展可靠的低功率无线通讯。本项目主要研究了以下几个方面的问题：首先，从保证一定误码率性能的角度出发，利用误码率的累积分布函数（CDF）对多径衰落环境下的直接序列超宽带（DS/UWB）系统的性能进行了评估;其次，研究了DS/UWB系统在多径信道下的协作通信性能。计算机仿真结果表明，在DS/UWB系统中，采用协作通信比采用传统分集接收能有效地改善非视距多径信道下的系统性能。第三，DS/UWB系统的捕获性能，特别是分组通信的捕获性能。在无线分组传输中，捕获必须在分组中的前导持续时间内完成。本课题在DS/UWB分组传输中采用RAKE合并和校验方式来对抗多径衰落。在IEEE802.15.4a多径衰落环境下的仿真结果表明，RAKE合并能显著提高捕获概率。此外，当验证模式配备有DS/UWB捕获系统时，平均捕获时间变得更短。此外，使用峰值检测器和间隔估计，提出了在多径衰落环境中实现更快，更准确的捕获。计算机仿真结果表明，在DS/UWB捕获中，峰值检测和间隔估计能有效地捕获匹配滤波器输出的精确峰值。此外，通过对峰值检测的捕获间隔进行优化设计，可以缩短捕获时间。