Hong Quy Nguyen

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SuperDARN is an international network of HF radars dedicated to the study of the Earth's upper atmosphere and ionosphere. The radars operate between 8 to 20 MHz and thus require broadband antennas for optimal performance. Since the first coherent HF backscatter radar was deployed by The John Hopkins University Applied Physics Laboratory these types of(More)
This paper presents the experimental research on the influence of clock synchronisation in a multi-transceiver radar system in terms of phase noise and stability of the clock source. The work involves an implementation of a clock distribution method and discusses the experimental results. The TIGER-3 radar is being developed as an “all(More)
Using covariance as natural features for Classifying Polysomnographys signal was not new in the literature. In the literature, space of covariance is an abstract space, the Riemannian manifold. It is non-trivial to classify by using well-known classifier because all algorithms were designed for Euclidean space only. In order to overcome, there are two ways(More)
Humankind envisioned an age of automatic where many machines perform all cumbersome and tedious tasks and we just enjoy. Playing music is not a tedious work but a program that plays music from music sheet image automatically can increase productivity of musician or bring convenience to amateurs. Following its requirement, we studied a specific task in(More)
The TIGER-3 radar is being developed as an “all digital” radar with 20 integrated digital transceivers, each connected to a separate antenna. Accurate coordination of all 20 transceivers is essential for both generation of transmit signals and collection and merging of receive data to form a standard Su-perDARN data set. This paper proposes a(More)
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