超宽带雷达生命信号频率检测的Cramer-Rao下界
doi: 10.3724/SP.J.1146.2010.00643
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。
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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
Abstract: 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.-
Key words:
- Vital signal detection /
- UWB /
- Cramer-Rao inequality /
- Fisher information /
- Equivalent time sampling
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Bugaev A S, Vasilev I A, and Ivashov S I, et al.. Radar methods of detection of human breathing and heartbeat [J].Journal of Communications Technology and Electronics.2006, 51(10):1154-1168[6]谢义方, 方广有. 基于无载频脉冲雷达信号等幅度追踪法检测生命信号[J].电子与信息学报.2009, 31(5):1132-1135浏览[7]Xie Yi-fang and Fang Guang-you. Equi-amplitude tracing algorithm based on base-band pulse signal in vital signal detecting [J].Journal of Electronics Information Technology.2009, 31(5):1132-1135[8]Lazaro A, Girbau D, and Villarion R. Analysis of vital signs monitoring using an IR-UWB radar [J].Progress in Electromagnetics Research.2010, 100:265-284[9]Li Chang-zhi and Lin Jen-shan. A 1-9 GHz linear-wide- tuning-range quadrature ring oscillator in 130 nm CMOS for non-contact vital sign radar application [J].IEEE Microwave and Wireless Components Letters.2010, 20(1):34-36[10]Nezirovic A, Yarovoy A G, and Ligthart L P. Signal processing for improved detection of trapped victims using UWB radar [J].IEEE Transactions on Geoscience and Remote Sensing.2010, 48(4):2005-2014[11]Gezici S. Theoretical limits for estimation of periodic movements in pulse-based UWB system [J].IEEE Journal of Selected Topic in Signal Processing.2007, 1(3):405-417[12]王鞠庭, 江胜利, 刘中. 复合高斯杂波中MIMO雷达DOA估计的克拉美-罗下限[J].电子与信息学报.2009, 31(4):786-789浏览[13]Wang Ju-ting, Jiang Sheng-li, and Liu Zhong. Cramer-Rao bounds of DOA estimation for MIMO radar in compound- Gaussian clutter [J].Journal of Electronics Information Technology.2009, 31(4):786-789[16]Yang Yun-qiang and Fathy A E. Development and implementation of a real-time see-through-wall radar system based on FPGA [J].IEEE Transactions on Geoscience and Remote Sensing.2009, 47(5):1270-1280 -
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