Research Of Life Detection For UWB Radar

Since ultra-wide band(UWB)technology was born,it has been attracted more and more attention in academic.Because of its small volume,low power consumption,strong penetrating power,good sealing performance,UWB technology has been widely used.Apart from the advantages described above,compared with continuous wave,UWB radar has higher positioning accuracy,lower cost and more research value.This paper mainly studies UWB radar life detection,designing proper algorithm to extract life information.Firstly,this paper describes some basic thesis about hardware design of UWB radar.Then some theory related with radar echo signal is given.Because the echo signal is weak,easily affected with noise signal and its spectrum is decentralized,a new signal method is proposed in this paper.In the new algorithm,band pass filter is used to separate heartbeat signal and respiration signal from the original data,avoiding interference from the two life signals.Main time domain signal is added up after decomposition to decrease affection of noise signal.The spectrums is added up to reduce the frequency loss.After that,a new hardware structure of UWB radar base on Chirp mode is introduced.An experiment about a known and a stationary object is used monitoring respiration of people to obtain error.At last some complicate life detection research is done using new hardware,proving the method in this paper can effectively extract life information.This paper mainly study the extraction of life information based on the UWB radar,and proposes a new signal algorithm and do some experiment about it.The final result proves the correction of the method,showing that the research of life detection using UWB radar has a good reference value and application prospect.