Collaborative Positioning (CP) is a better localization technique used to
locate a user in challenged environments, which is driven by the increasing
presence of cellular phones and mobile devices in urban areas. The basic idea
is that the mobile devices can cooperate with each other to improve their
ability to determine their position. In this concept, a network of GNSS (Global
Navigation Satellite System) receivers can collectively receive available
satellite signals, and each receiver can receive signal measurements from other
receivers via a communication link. This work shows how to use the Collective
Detection (CD) approach to deal with the concept of collaborative or
cooperative positioning. Specifically, this paper develops a new strategy
allowing a receiver in deep urban environment to locate using the CD approach,
while overcoming the implementation complexity problem. The idea consists in
applying the CD approach in the case of multiple GNSS receivers to assist a
receiver in a difficult situation. A typical case of two connected receivers
assisting a receiver in difficulty in a deep urban area shows the effectiveness
of this strategy. This strategy is tested with real GNSS signals to analyze its
feasibility. The overall gain in complexity can reach up to 46% of what has
been achieved in previous works.
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