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The double time difference of arrival (DTDOA) approach applying in the mobile ad hoc network can effective avoid the synchronization problem. This paper investigates the performance of techniques for DTDOA node localisation in mobile ad hoc network by using root of quadratic equation and Gauss-Newton algorithm in NLOS environments. The validity of DTDOA method is demonstrated in an example of a simple...
This paper describes a double time difference of arrival (DTDOA) method with Kalman filtering for tracking a mobile node in an ad hoc network. The DTDOA method relies on a double time difference of data arrival without time synchronization of various nodes of the system. The Kalman filtering is applied to smooth the results for static node location as well as to predict a mobile node trajectory. The...
The paper describes a new data fusion method for positioning of mobile users in an ad hoc wireless network. The method relies on a double time difference of data arrival. In difference to the presently used alternatives it does not rely on time synchronization of various nodes of the system. It reduces to solving a nonlinear system of equations, which can be handled using standard procedures. Its...
Most of the routing protocols designed for ad hoc networks assume that IEEE 802.11b is used for lowest-layer communications. In IEEE 802.11 ad hoc mode, the DCF is the basic medium access protocol. In this paper we consider voice calls over mobile ad hoc network based on 802.11b MAC. A new routing metric for searching a stable routing in ad hoc network based on an extended AODV protocol is proposed...
Communication systems that possess a fixed backbone topology have difficulty maintaining service when there are failures in the backbone. Consequently, a reliance on fixed backbones is not admissible for emergency communications in situations where failures are commonplace. In underground mines for example, the impact of the hazardous environment can render conventional communications systems inoperable-just...
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