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超宽带雷达生命信号频率检测的Cramer-Rao下界 被引量：4

Cramer-Rao Lower Bound of Vital Signal Frequency Detection for Ultra Wideband Radar
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摘要 该文基于脉冲超宽带顺序信号模型和极大似然准则,结合Fisher信息矩阵和Cramer-Rao矩阵不等式,分析了UWB生命信号参数估计的泛化Cramer-Rao下界(CRLB)。根据等效时间采样原理,采用正弦位移函数近似生命微动信号,推导出了修正的UWB生命信号频率检测CRLB公式。仿真结果表明,增大观测时间、发射脉冲带宽以及系统信噪比可提高UWB雷达生命信号频率检测的精度。心跳信号检测比呼吸信号要求更高。 On the basis of the impulse Ultra Wide Band（UWB） sequential signal module and the Maximum Likelihood（ML） rule,the generalized Cramer-Rao Lower Bound（CRLB） for UWB vital signal parameter estimation is analyzed with the Fisher Information Matrix（FIM） and the Cramer-Rao matrix inequation.According to the equivalent time sampling principal,the improved CRLB formula of UWB vital signal frequency detection is derived by adopting a sinusoidal displacement function superseding the vital jiggle signal.The simulation results show that the frequency precision of UWB radar vital signal detection increases with increasing the survey time,the impulse bandwidth and the system SNR.The heartbeat detection demands more rigorous conditions than that of the respiration detection.
作者 戴舜 方广有
机构地区 中国科学院电子学研究所 中国科学院研究生院
出处 《电子与信息学报》 EI CSCD 北大核心 2011年第3期701-705,共5页 Journal of Electronics & Information Technology
基金 国家863计划项目(2007AA12Z124)资助课题
关键词 生命信号检测 超宽带 Cramer-Rao不等式 Fisher信息 等效时间采样 Vital signal detection UWB Cramer-Rao inequality Fisher information Equivalent time sampling
分类号 TN958 [电子电信—信号与信息处理]
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参考文献14

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共引文献11

同被引文献48

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引证文献4

二级引证文献24

电子与信息学报
2011年 第3期

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