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In this letter, a phase-based algorithm based on a logarithmic method, applicable to UWB radars and suitable to real-time monitoring, is proposed to detect the phase variations of reflected pulses caused by the tiny cardiac motions. Compared with conventional FFT vital signs detection method, this algorithm demonstrates advantage in respiration harmonics suppression and avoidance of intermodulation...
Ultra-wide band (UWB) pulse Doppler radars provide range-time-frequency information which enables the target localization and vital sign monitoring of a subject. One challenge for UWB radar systems is accurately detecting the heartbeat of a subject, i.e. recording the small displacements of thorax caused by heartbeat due to its poor S/N ratio. Given that the phase-based algorithms are more robust...
UWB Doppler radar is capable of monitoring vital signs of human beings in a non-contact way by detecting the changes in the time of flight of narrow pulses emitted by the radar and reflected from the human chest. However, the received signal may be corrupted when there is a random motion if handheld UWB radar is used, especially when the amplitude of motion is higher than that of the thoracic motion...
Pulse Doppler radars using UWB technology are becoming very popular for their wide range of capabilities and applications. UWB waveforms are used for imaging in indoor environments, target localization and classification behind walls, and evaluating micro-Doppler signatures. UWB pulse Doppler radars provide range-time-frequency representation that provides both highly accurate range and micro-Doppler...
Pulse Doppler radars using UWB technology are becoming very popular for their wide range of capabilities and applications. UWB waveforms are used for imaging in indoor environments, target localization and classification behind walls, and evaluating micro-Doppler signatures. Typically, CW and FMCW radars are used for measuring time Doppler frequency shifts and subsequently providing time-frequency...
In this paper, we present a low cost ultra wideband (UWB) biometric radar sensor for respiration detection and monitoring applications. By using pulse Doppler radar technology, the developed sensor goes beyond detecting the breathing of a single person as conventional radars do; to simultaneously localizing and monitoring multiple human objects as well. The biometric sensor achieves a high range resolution...
A UWB impulse Doppler radar has been developed recently to detect the micro-Doppler signatures of human motions. The system RF front-end, wideband antenna array and high speed data acquisition module are introduced in details. The developed radar is used to detect the Doppler features of arms swing, which has unique characteristics compared to movements of other body components, for intelligent human...
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