Theoretical Limits for Estimation of Vital Signal Parameters Using Impulse Radio UWB
Theoretical Limits for Estimation of Vital Signal Parameters Using Impulse Radio UWB
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使用脉冲无线电 UWB 估计生命信号参数的理论极限
DOI：
10.1109/icc.2007.953
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Z. Sahinoglu
中科院分区：
文献类型：
--
作者：
S. Gezici;Z. Sahinoglu
在本文中，Cramer-Rao下界（CRLB）的生命信号参数，如呼吸和心跳率，使用超宽带（UWB）脉冲的估计。此外，在一定条件下，得到了正弦位移函数的CRLB的一个简单的封闭形式的表达式。此外，一个两步的次优解决方案，这是基于时间延迟估计，通过匹配滤波，其次是最小二乘（LS）估计。结果表明，所提出的解决方案是渐近最优的某些系统参数的限制。仿真研究进行评估的下限和性能的建议的解决方案的现实系统参数。
In this paper, Cramer-Rao lower bounds (CRLBs) for estimation of vital signal parameters, such as respiration and heart-beat rates, using ultra-wideband (UWB) pulses are derived. In addition, a simple closed-form CRLB expression is obtained for sinusoidal displacement functions under certain conditions. Moreover, a two-step suboptimal solution is proposed, which is based on time-delay estimation via matched filtering followed by least-squares (LS) estimation. It is shown that the proposed solution is asymptotically optimal in the limit of certain system parameters. Simulation studies are performed to evaluate the lower bounds and performance of the proposed solution for realistic system parameters.