Title :
On the Trade-Off Between Accuracy and Delay in Cooperative UWB Localization: Performance Bounds and Scaling Laws
Author :
Garcia, Gabriel E. ; Muppirisetty, L.S. ; Schiller, Elad M. ; Wymeersch, Henk
Author_Institution :
Dept. of Signals & Syst., Chalmers Univ. of Technol., Götenburg, Sweden
Abstract :
Ultra-wide bandwidth (UWB) systems allow for accurate positioning in environments where global navigation satellite systems may fail, especially when complemented with cooperative processing. While cooperative UWB has led to centimeter-level accuracies, the communication overhead is often neglected. We quantify how accuracy and delay trade off in a wide variety of operation conditions. We also derive the asymptotic scaling of accuracy and delay, indicating that, in some conditions, standard cooperation offers the worst possible tradeoff. Both avenues lead to the same conclusion: indiscriminately targeting increased accuracy incurs a significant delay penalty. Simple countermeasures can be taken to reduce this penalty and obtain a meaningful accuracy/delay trade-off.
Keywords :
access protocols; cooperative communication; time division multiple access; ultra wideband communication; cooperative UWB localization; cooperative processing; global navigation satellite system; medium access control; significant delay penalty; ultrawide bandwidth system; Accuracy; Delays; Distance measurement; Nickel; Silicon; Standards; Time division multiple access; Medium access control (MAC) delay; S-time division multiple access (TDMA); navigation; positioning; ultra-wideband positioning;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2014.2314662