发射功率随机时Ad Hoc网络和传感器网络的信号强度定位界限

Fourth IEEE Workshop on Sensor Array and Multichannel Processing, 2006. Pub Date : 2006-07-12 DOI:10.1109/SAM.2006.1677207

Neal Patwari, A. Hero

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引用次数: 25

摘要

假设接收信号强度(RSS)测量是在完全已知的传感器发射功率下进行的，则推导出传感器定位界限。本文假设发射功率是随机的，先验分布已知，导出了贝叶斯Cramer-Rao界。此外，还明确地考虑了每个环节上从i到j和从j到i的方向测量及其相关性。结果表明，随机发射功率对坐标估计边界的影响很小(5-13%)。然而，仅使用方向测量的平均值可以显着增加这些界限

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Signal Strength Localization Bounds in Ad Hoc and Sensor Networks when Transmit Powers are Random

Sensor localization bounds have been derived assuming that received signal strength (RSS) measurements are performed with perfectly known sensor transmit powers. In this paper the Bayesian Cramer-Rao bound is derived assuming transmit powers are random with known prior distribution. Further, both directional measurements on each link, from i to j and from j to i, and their correlation, are explicitly considered. Results show that random transmit powers have a small (5-13%) impact on coordinate estimation bounds. However, using only the average of the directional measurements can significantly increase these bounds

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Fourth IEEE Workshop on Sensor Array and Multichannel Processing, 2006.

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