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Clock-Offset Tracking Software Algorithms For IR-UWB Energy-Detection Receivers
Author Flury, Manuel and Merz, Ruben and Le Boudec, Jean-Yves
Title of Book Proceedings of IEEE International Conference on Ultra-Wide Band (ICUWB '09)
Pages 337–342
Year 2009
ISBN 978-1-4244-2930-1
DOI http://dx.doi.org/10.1109/ICUWB.2009.5288732
Location Vancouver, British Columbia, Canada
Month September
Publisher ACM
Abstract We present a clock-offset tracking algorithm for impulseradio ultra-wide band (IR-UWB) energy-detection receivers. There is a complexity versus performance trade-off for the design of IR-UWB energy-detection receivers: Extremely lowcomplexity energy-detection receivers are built with a large, constant integration duration; they are robust to clock drifts but are sensitive to noise enhancement effects and cannot adapt to channel variations. More sophisticated energy-detection receivers use a shorter integration duration and combine several weighted outputs of the energy collector; they are robust to noise enhancement effects, can adapt to channel variations and offer a much better performance than non-adaptive receivers. However, they become sensitive to clock offsets. Hence, there is a need for lowcomplexity clock-offset tracking solutions to support adaptive energy-detection receivers. Our solution is constructed around the Radon transform, an image processing tool traditionally used to detect line features in images. Our solution is fully compatible with the IEEE 802.15.4a standard, does not increase the hardware complexity of the receiver and reduces the performance loss due to clock offset to less than 0.5 dB.
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