The range alignment approach is applied to solve the misalignment between the sampling clock and trigger pulse for signal acquisition system of pulse and Doppler (PD) radar. Adjacent pulse correlation (APC) and minimum entropy (ME) methods are utilized to suppress sidelobes and promote the detection performance. Experimental results have demonstrated the effectiveness of proposed methods.

We introduce a Doppler OCT (DOCT) platform that is fully synchronized with the heart-beat via a pulse oximeter. The system allows reconstructing heart-beat-phase-coherent quantitative DOCT volumes. The method is to acquire a series of DOCT volumes and to record the pulse in parallel. The heartbeat data is used for triggering the start of each DOCT volume acquisition. The recorded volume series ...

Abstract Upper-ocean turbulence is central to the exchanges of heat, momentum, and gasses across air/sea interface, therefore plays a large role in weather climate. Current understanding upper-ocean mixing lacking, often leading models misrepresent mixed-layer depths sea surface temperature. In part, progress has been limited due difficulty measuring from fixed moorings which can simultaneously...

INTRODUCTION The unreliability of the pulse examination of the foot has primarily been due to variability of technique between examiners. Whereas the groove between the medial malleolus and the Achilles tendon more readily defines the location of the posterior tibial pulse, the location of the dorsalis pedis pulse remains vague. In this paper a novel method of locating the dorsalis pedis pulse ...

Pulsed wave ultrasound systems can be used for determining blood's velocity non-invasively in the body. A region of interest is selected, and the received signal is range gated to measure data from the region. One complex sample value is acquired for each pulse emission after complex demodulation of the received signal. The time evolution and distribution of velocity can then be found by using ...

The Doppler Dilemma or range-velocity folding of echoes from uniformly spaced transmit pulse trains of weather radar poses a fundamental limit on radar data quality: there is a limited unambiguous range for echos and there is a maximum unambiguous velocity. The radar pulse repetition time may be adjusted to increase either the unambiguous range or the maximum unambiguous velocity but the other ...