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On the Trade-Off Between Accuracy and Delay in Cooperative UWB Localization: Performance Bounds and Scaling Laws

Gabriel E. Garcia (Institutionen för signaler och system, Kommunikationssystem) ; Leela Srikar Muppirisetty (Institutionen för signaler och system, Kommunikationssystem) ; Elad Michael Schiller (Institutionen för data- och informationsteknik, Nätverk och system, Datakommunikation och distribuerade system (Chalmers)) ; Henk Wymeersch (Institutionen för signaler och system, Kommunikationssystem)
IEEE Transactions on Wireless Communications (1536-1276). Vol. 13 (2014), 8, p. 4574-4585.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: wide-band localization, fundamental limits, wireless networks, technology, navigation, channels

Denna post skapades 2014-11-14. Senast ändrad 2016-12-06.
CPL Pubid: 205773


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