Energy-Aware Bio-signal Compressed Sensing Reconstruction: FOCUSS on the WBSN-Gateway

Daniele Bortolotti, Andrea Bartolini, Mauro Mangia, Riccardo Rovatti, Gianluca Setti, Luca Benini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations


Technology scaling enables today the design of ultra-low power wearable bio-sensors for continuous vital signs monitoring or wellness applications. Such bio-sensing nodes are typically integrated in Wireless Body Sensor Network (WBSN) to acquire and process biomedical signals, e.g. Electrocardiogram (ECG), and transmit them to the WBSN gateway, e.g. smartphone, for online reconstruction or features extraction. Both bio-sensing node and gateway are battery powered devices, although they show very different autonomy requirements (weeks vs. days). The rakeness-based Compressed Sensing (CS) proved to outperform standard CS, achieving a higher compression for the same quality level, therefore reducing the transmission costs in the node. However, most of the research focus has been on the efficiency of the node, neglecting the energy cost of the CS decoder. In this work, we evaluate the energy cost and real-time reconstruction feasibility on the gateway, considering the FOCUSS signal reconstruction algorithm running on a heterogeneous mobile SoC based on the ARM big. LITTLE TM architecture. The experimental results show that standard CS does not satisfy real-time constraints, while the rakeness enables different QoS-energy trade-offs, achieving the most efficient real-time reconstruction on the Cortex-A7 @ 1.3 GHz for 0.2 J/window (for a target QoS of 23 dB), while the lowest CPU consumption is achieved with the Cortex-A15 @ 1.9 GHz.
Original languageEnglish (US)
Title of host publicationProceedings - IEEE 9th International Symposium on Embedded Multicore/Manycore SoCs, MCSoC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages7
ISBN (Print)9781479986699
StatePublished - Nov 11 2015
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-02-15


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