Timing ultra-wideband signals with dirty templates
Timing ultra-wideband signals with dirty templates
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DOI：
10.1109/tcomm.2005.858663
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发表时间：
2005-11
影响因子：
8.3
通讯作者：
Liuqing Yang;G. Giannakis
中科院分区：
文献类型：
--
作者：
Liuqing Yang;G. Giannakis
用于室内无线通信的超宽带（UWB）技术承诺具有低复杂度收发器的高数据速率。快速定时同步构成了实现这些承诺的主要挑战。在本文中，我们建立了一个新的同步标准，我们称之为“定时与脏模板”（TDT），在此基础上，我们开发和测试定时算法在数据辅助（DA）和非数据辅助模式。对于DA模式，我们设计了一个训练模式，它不仅可以加快同步，而且可以在多用户环境中实现定时。基于简单的积分和转储操作的符号持续时间，我们的TDT算法保持在实际的UWB设置操作。当避免符号间干扰时，它们也容易适用于窄带系统。仿真结果证实了TDT的性能改善相对于现有的替代品的均方误差和误码率。
Ultra-wideband (UWB) technology for indoor wireless communications promises high data rates with low-complexity transceivers. Rapid timing synchronization constitutes a major challenge in realizing these promises. In this paper, we establish a novel synchronization criterion that we term "timing with dirty templates" (TDT), based on which we develop and test timing algorithms in both data-aided (DA) and nondata-aided modes. For the DA mode, we design a training pattern, which turns out to not only speed up synchronization, but also enable timing in a multiuser environment. Based on simple integrate-and-dump operations over the symbol duration, our TDT algorithms remain operational in practical UWB settings. They are also readily applicable to narrowband systems when intersymbol interference is avoided. Simulations confirm performance improvement of TDT relative to existing alternatives in terms of mean square error and bit-error rate.