摘要
目的:研究生物雷达监护过程中,不同呼吸模式对雷达信号分离提取的影响。方法 :在不同呼吸模式下,获取雷达式生命参数监护系统的回波信号,应用改进的信号分离算法,分离出呼吸和心跳信号,并提取对应信号的参数特征。结果:2种呼吸模式下,自适应滤波器输出的信号中心频率与心跳信号频率一致,且其余频点信号得到有效抑制。结论:该算法可以有效地分离出心跳信号,同时有效抑制其他干扰信号。
Objective To separate the biological radar echo signals in different breathing modes. Methods Echo signals of bioradar-based vital signs monitoring system were acquired in different breathing modes, and an improved signal separa-tion algorithm was used to obtain respiratory and heartbeat signals as well as their parameters.Results Under two breath-ing modes, the center frequencies of the signals from the self-adaptive filter were kept consistent with those of heartbeat signals, and the signals with other frequencies were suppressed effectively. Conclusion The algorithm can be used to sep-arate heartbeat signals while suppress other interference signals effectively. ZHANG Jing and LIU Qian are the first au-thors who contributed equally to the article.
出处
《医疗卫生装备》
CAS
2015年第9期38-40,共3页
Chinese Medical Equipment Journal
基金
国家自然科学基金面上项目(61271102)
关键词
呼吸模式
生物雷达
自适应滤波
信号分离
breathing mode
bioradar
self-adaptive filtering
signal separation
