Energy efficient asynchronous wireless transmission

Project is supported in part by Croatian Science Foundation under the project number UIP-2014-09-6219

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About the project: 

Title: Energy Efficient Asynchronous Wireless Transmission 
Benefficiary: Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Budget of the project: 917.938,20 HRK
Project duration: 01.09.2015.-31.08.2018.

Project team:

Doc.dr.sc. Tomislav Matić, project coordinator

Prof.dr.sc. Tomislav Švedek, project associate
Doc.dr.sc. Marijan Herceg, project associate
Doc.dr.sc. Josip Job, project associate
Doc.dr.sc. Mario Vranješ, project associate
Doc.dr.sc. Ratko Grbić, project associate
Prof.dr.sc. Denis Pelin, project associate
Denis Vranješ, mag.ing., project associate.

Project plan:

The proposed research activities within the project are directed towards implementation of the asynchronous integrated circuits for wireless transmission of analog signals, applicable as sensor nodes within Wireless Sensor Networks. Due to narrow pulse width and low duty cycling operation, Ultra-Wideband (UWB) modulation techniques are becoming attractive choice for energy efficient wireless transmission. Development of existing and implementation of new wideband modulation techniques will be carried out to enable energy efficient operation of the sensor node. To satisfy energy efficiency and size constraints, the transmission system will be implemented in suitable CMOS process.  

Project description:

To achieve RF communication circuits and systems energy efficiency and size reduction, asynchronous design and wideband modulation techniques are becoming more popular recently. Great challenge in asynchronous wireless transmission is pulse detection on the receiver side and multi-user coding implementation. Proposed system for asynchronous wireless transmission basically can be divided into two subsystems, analog-to-digital converter and wideband modulator for wireless transmission. Therefore, the project activities can be divided into two phases. First phase includes asynchronous A/D converter implementation, while second phase includes activities towards modulator implementation based on UWB pulse generator. For analog-to-digital converter implementation asynchronous sigma-delta modulator will be considered and various types of level-crossing architectures, while UWB modulator will be implemented to meet the requirements for digital input signal operation.

 

Previous research and development activities:

Previous research and development activities in the field of wireless signal acquisition are carried out through the project “Energy efficient system for wireless measurement of biological signals” co-funded by Business Innovation Croatian Agency through the Proof of Concept program PoC4. The project result was the discrete implementation prototype for wireless measurement of heart beat rate and oxygen blood saturation level, protected by international patent application. The project results have established presumptions for further research and development and implementation of IC based wireless sensor nodes.

Project deliverables:

The project has provided required funds for establishment of research group and laboratory for RF integrated circuit design and testing. Acquired equipment and research activities during project implementation will enable relevant competitiveness in peer review journal publishing in the field of integrated circuit design and processing. Two prototypes of the wireless sensor nodes based on asynchronous modulation and ultra-wideband wireless transmission are predicted for processing during the project duration. 

 

Benefits of the project:

In line with the Strategy of the Josip Juraj Strossmayer University of Osijek 2011. – 2020. the project significantly contributes to improvement of the research and development activities in the STEM field (Science, Technology, Engineering and Mathematics), which will further contribute to competitiveness of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek study programs comparing to the relevant worldwide institutions in the field of electronics and wireless communications. Together with the increased competitiveness in the peer review journals publishing, the Faculty will also acquire more relevant competencies for international project applications and fund raising. Besides scientific results deliverables, long term deliverable of the project is establishment of the laboratory and research group for radio frequency IC design.