A Novel Bayesian Impulse Radio Ultra-WideBand Ranging Algorithm Based on Importance Sampling

• Published in: 2009 Proceedings of 18th International Conference on Computer Communications and Networks pp. 1 - 5
• Main Authors: Hai Zhan, Le Boudec, J.-Y., Ayadi, J., Farserotu, J.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.08.2009
• Subjects: Additive noise; Algorithm design and analysis; Bayesian methods; Computer architecture; Computer vision; Gaussian noise; Mean square error methods; Monte Carlo methods; Probability density function; Ultra wideband technology
• ISSN: 1095-2055; 2637-9430
• DOI: 10.1109/ICCCN.2009.5235265

We consider the problem of ranging with Impulse Radio (IR) Ultra-WideBand (UWB) radio under weak Line Of Sight (LOS) environments and additive Gaussian noise. We use a Bayesian approach where the prior distribution of the channel follows the IEEE 802.15.4a channel model, to estimate the joint posterior probability density function (pdf) of the channel and the targeted distance. One of applications of the joint posterior pdf of the channel and the targeted distance is the ranging determination with classical posterior estimators (such as Minimum Mean Square Error Estimator (MMSE)). For computing the joint posterior pdf of the channel and the targeted distance, we derived a novel algorithm which is based on importance sampling and expectation maximum techniques. Furthermore, we propose a reduced-complexity architecture of IR UWB ranging system using our proposed algorithm. The complexity analysis of the algorithm shows the proposed algorithm is a low-complexity one. Numerical evaluations under the IEEE 802.15.4a channel model are presented to demonstrate the good performance of the proposed estimator.