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This paper presents a novel signal processing technique, coined grid hopping,
as well as an active multistatic Frequency-Modulated Continuous Wave (FMCW)
radar system designed to evaluate its performance. The design of grid hopping
is motivated by two existing estimation algorithms. The first one is the
indirect algorithm estimating ranges and speeds separately for each received
signal, before combining them to obtain location and velocity estimates. The
second one is the direct method jointly processing the received signals to
directly estimate target location and velocity. While the direct method is
known to provide better performance, it is seldom used because of its high
computation time. Our grid hopping approach, which relies on interpolation
strategies, offers a reduced computation time while its performance stays on
par with the direct method. We validate the efficiency of this technique on
actual FMCW radar measurements and compare it with other methods.
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