Ultra-wide-band (UWB) signals are suitable for localization, since their high time resolution can provide precise time of arrival (TOA) estimation. However, one major challenge in UWB signal processing is the requirem...Ultra-wide-band (UWB) signals are suitable for localization, since their high time resolution can provide precise time of arrival (TOA) estimation. However, one major challenge in UWB signal processing is the requirement of high sampling rate which leads to complicated signal processing and expensive hardware. In this paper, we present a novel UWB signal sampling method called UWB signal sampling via temporal sparsity (USSTS). Its sampling rate is much lower than Nyquist rate. Moreover, it is implemented in one step and no extra processing unit is needed. Simulation results show that USSTS can not recover the signal precisely, but for the use in localization, the accuracy of TOA estimation is the same as that in traditional methods. Therefore, USSTS gives a novel and effective solution for the use of UWB signals in localization.展开更多
超宽带技术(UWB)在无线通信、雷达、传感等多个领域有着重要的应用,由低损耗、高带宽的光纤传输的UWB光传输系统,即UWB over fiber,是目前国内外研究的热点课题,如何在光域中生成UWB信号是该系统的关键技术之一。为此提出了一种利用半...超宽带技术(UWB)在无线通信、雷达、传感等多个领域有着重要的应用,由低损耗、高带宽的光纤传输的UWB光传输系统,即UWB over fiber,是目前国内外研究的热点课题,如何在光域中生成UWB信号是该系统的关键技术之一。为此提出了一种利用半导体光放大器(SOA)的交叉增益调制(XGM)效应和布拉格光纤光栅(FBG)光学生成UWB信号的方法并进行了仿真实验,得到了符合FCC标准的中心频率为4.6 GHz,-10 dB带宽为135%的UWB信号。最后分析了该方法存在的问题。展开更多
基金supported by National science foundation(No. 60772035): Key technique study on heterogeneous network convergenceDoctoral grant(No.20070004010)s: Study on cross layer design for heterogeneous network convergence+1 种基金National 863 Hi-Tech Projects(No.2007AA01Z277): Pa-rameter design based electromagnetic compatibility study in cognitive radio communication systemNational science foundation(No. 60830001): Wireless communication fundamentals and key techniuqes for high speed rail way control and safety data transmission
文摘Ultra-wide-band (UWB) signals are suitable for localization, since their high time resolution can provide precise time of arrival (TOA) estimation. However, one major challenge in UWB signal processing is the requirement of high sampling rate which leads to complicated signal processing and expensive hardware. In this paper, we present a novel UWB signal sampling method called UWB signal sampling via temporal sparsity (USSTS). Its sampling rate is much lower than Nyquist rate. Moreover, it is implemented in one step and no extra processing unit is needed. Simulation results show that USSTS can not recover the signal precisely, but for the use in localization, the accuracy of TOA estimation is the same as that in traditional methods. Therefore, USSTS gives a novel and effective solution for the use of UWB signals in localization.
文摘超宽带技术(UWB)在无线通信、雷达、传感等多个领域有着重要的应用,由低损耗、高带宽的光纤传输的UWB光传输系统,即UWB over fiber,是目前国内外研究的热点课题,如何在光域中生成UWB信号是该系统的关键技术之一。为此提出了一种利用半导体光放大器(SOA)的交叉增益调制(XGM)效应和布拉格光纤光栅(FBG)光学生成UWB信号的方法并进行了仿真实验,得到了符合FCC标准的中心频率为4.6 GHz,-10 dB带宽为135%的UWB信号。最后分析了该方法存在的问题。
