Relay Placement for Reliable Ranging in Cooperative mm-Wave Systems

Abstract : We study millimeter wave based ranging of randomly located terminal nodes (TN) using fixed relay nodes (RN) deployed around a central node (CN). This setting may correspond to a disaster-relief scenario where the rescuers require positioning information in the absence of a global positioning system (GPS). We derive the Bayesian Cramer-Rao lower bound (BCRLB) for the TNs range estimation from the CN as well as from the RNs in this network using a stochastic geometry framework. Contrary to existing studies, we take the effect of link-blockages into account while deriving the BCRLB, and thereby present a more accurate bound on the ranging error. For the special case of no blockages, we formulate a convex problem for obtaining the optimal relay positions. Our results provide the operator a guideline for initial deployment planning, in terms of number and location of RNs to be deployed in order to achieve an accurate ranging.
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Submitted on : Monday, October 14, 2019 - 11:07:15 AM
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Gourab Ghatak, Antonio de Domenico, Marceau Coupechoux. Relay Placement for Reliable Ranging in Cooperative mm-Wave Systems. IEEE wireless communications letters, IEEE comsoc, 2019, 8 (5), pp.1324-1327. ⟨10.1109/LWC.2019.2915824⟩. ⟨hal-02132354⟩

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