1. Accurate and Simple Wireless Localizations Based on Time Product of
Arrival in the DDM-NLOS Propagation Environment
Abstract:
Wireless localization has become an important issue in internet of things.
However, its performance degrades significantly when there are only non-
line-of-sight (NLOS) propagation paths instead of line-of-sight (LOS)
propagation paths. Therefore, this paper proposes a novel localization
algorithm to improve the localization accuracy, where we assume that the
NLOS error satisfies the requirement of distance dependent model (DDM).
In order to obtain a stronger NLOS tolerance than conventional methods,
the proposed algorithm analyzes the localization geometry and employs a
new localization parameter, namely the time product of arrival (TPOA), to
construct the linear localization equation group (LLEQ). Meanwhile, a
simple least-squares (LS) principle is applied to solve this LLEQ, resulting
in a low complexity. We verify our algorithm by computer simulations,
and the result demonstrates that the proposed algorithm yields a better
performance than traditional algorithms in the NLOS-DDM environment.