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Time of Arrival (ToA) is a popular technique for terrestrial positioning. This paper presents a comparison of ToA based residual related positioning algorithms in wireless terrestrial and sensor networks in both long range outdoor and short range indoor environments. Using ToA distance measurement error models in both environments, we compare the performance of the Least Square Estimation (LSE), Residual...
Non line-of-sight (NLOS) propagation in range measurement is a key problem for mobile terminal localization. This paper proposes a low computational residual test (LCRT) algorithm that can identify the number of line-of-sight (LOS) transmissions and reduce the computational complexity compared with the residual test (RT) algorithm. LCRT is based on the assumption that when all range measurements are...
Non-line-of-sight (NLOS) errors have been considered as a killer issue for the multihop wireless sensor network (WSN) localization. Although there are some techniques that can be used to mitigate this kind of errors, they are not quite suitable for sensor networks because of the intensive computation, big amount of communication or the demand for prior information on LOS-NLOS channel conditions. In...
Reliable location estimation is an essential and fundamental issue for wireless sensor network. In order to find a localization algorithm robust to non-line-of-sight (NLOS) propagation errors in sensor network system, we analyzed some latest localization algorithms. Considering the application environments of the network, the energy consumption of nodes, the amount of computation and the location...
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