| DS-UWB定位系统传输时延估计 |
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| 引用本文： | 徐巧勇,陈浩珉,王宗欣.DS-UWB定位系统传输时延估计[J].复旦学报(自然科学版),2004,43(1):92-96. |
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| 作者姓名： | 徐巧勇 陈浩珉 王宗欣 |
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| 作者单位： | 复旦大学,通信科学与工程系,上海,200433;复旦大学,通信科学与工程系,上海,200433;复旦大学,通信科学与工程系,上海,200433 |
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| 基金项目： | 国家自然科学基金资助项目(60172021) |
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| 摘 要： | 用改进后的多重信号分类(MUSIC)方法估计直接序列扩频一超宽带(DS-UWB)系统的时延．将脉冲处理增益引入UWB系统，并把每个用户的其他多径信号归入噪声子空间处理，以利于对主径信号进行准确的时延估计，同时也改善了MUSIC方法中对用户数的限制．在UWB室内路径损耗模型下，比较了相关接收机(Correlator)和多重信号分类(MUSIC)2种方法的多用户、主径信号的时延估计结果。
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| 关 键 词： | 通信技术 直接序列扩频-超宽带 相关接收机 多重信号分类 时延 |
| 文章编号： | 0427-7104(2004)01-0092-05 |
Estimation of Propagation Delay in DS-UWB Location System |
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| XU Qiao-yong,CHEN Hao-min,WANG Zong-xin.Estimation of Propagation Delay in DS-UWB Location System[J].Journal of Fudan University(Natural Science),2004,43(1):92-96. |
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| Authors: | XU Qiao-yong CHEN Hao-min WANG Zong-xin |
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| Abstract: | An improved multiple signal classification(MUSIC) method is used to estimate the propagation delay in direct-sequence spread ultra-wideband(DS-UWB) system. By introducing pulse processing gain into the UWB system and regarding the signal of other multipath as a part of the noise subspace, the delay of mainpath signal can be accurately estimated. Meanwhile the limitation on the number of users in normal MUSIC method is improved. Based on the model of UWB indoor path loss, the delay estimations of mainpath signal in the multi-user environment obtained with Correlator and MUSIC methods are also compared. |
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| Keywords: | communication technology DS-UWB correlator MUSIC time delay |
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