abiri@home

Developed, specified, and coordinated embedded control applications for the wireless sub-system of an industry-leading hearing aid.

• Developed embedded software in modern C++ on a proprietary low-power ASIC
• Designed, implemented, and tested an extensive code base for wireless communication using 2.4 GHz (Bluetooth Classic, BLE incl. LE Audio, and proprietary protocols for low-latency audio and data)
• Technical lead for a product improvement update of the microcontroller software
• Served as the primary point of contact for internal stakeholders for embedded software subsystem development
• Planned multiple months-long stabilization phases to adhere to medical device regulations

Designed cutting-edge wireless protocols, developed novel sensing systems, and built and tested the designs under harsh alpine environments to validate their applicability.

• Published four first-author papers, presented at four first-class conferences, wrote ten additional papers with collaborators
• Developed a variety of communication schemes and wireless protocols for autonomous sensor networks
• Designed and programmed custom PCBs for analog sensing and wireless communication across a variety of frequency bands (sub GHz, LoRa, 2.4 GHz, UWB, cellular, GNSS)
• Tested designs through automated test infrastructure in indoor testbeds as well as multi-year outdoor deployments with live monitoring, remote controlling, and continuous analysis
• Mentored and closely supervised more than ten students for their semester and Master's theses

Designed, evaluated, and implemented a two-way communication link over Long Range Bluetooth between laser measurement stations.

• Designed a wireless communication link on two proprietary platforms in commercial use
• Programmed in C on Windows Embedded Compact

TotTernary provides a mobile, accurate, responsive, and reliable platform for ranging measurements which allows users to gather both distance and position information with decimeter accuracy. Measuring only 61 mm x 35 mm and weighing 7.7 g, it integrates two radios to achieve both low-power neighbour discovery and direct user interactions using Bluetooth Low Energy as well as precise ultrawideband ranging measurements. The system leverages a novel energy-efficient ranging protocol with linear message complexity to achieve lifetimes of up to 39 days. Leveraging both antenna as well as frequency diversity, we demonstrate that the median ranging error can be reduced by up to 86% and that our system is capable of highly reliable and consistent measurements with as little as 14.8 cm of ranging error in the 99th percentile and a 90% confidence interval of 11.3 cm.

Real-time scheduling conficts arise as the resource separation of the applications in software is diffcult to manage. To achieve independence, we propose a platform consisting of dedicated application and communication processors which are completely decoupled in terms of resource access, clock speeds and power management using BOLT. Leveraging this hardware separation, we then use the Distributed Real-time Protocol (DRP) to provably provide end-to-end real-time guarantees for the communication between distributed applications over a multi-hop wireless network. By establishing a set of contracts at run-time, DRP ensures that all messages reaching their destination meet their hard deadline.

This thesis presents an infrastructure-less, scalable, real-time positioning system for mobile entities. The system is designed based on multidimensional scaling (MDS) and multilateration. One of the key features is that there is no need for fixed anchor nodes. We achieve this by leveraging multidimensional scaling to generate a relative 3D coordinate system, after which all nodes can be mobile. The system can support real-time position estimation of multiple mobile nodes with high accuracy.

Start-up with fellow students from ETH Zürich and the University of St. Gallen. We developed a solution for interactive reading and writing with individual paths for a more personalized experience, both accessible over a custom webpage and as an Android app. The project was invited to the "Swiss Startup Awards" as one of the most promising startups of Switzerland. We designed and implemented the website, where my main contribution was the entire backend using REST and Hibernate for the database access, and programmed an Android app for mobile interaction.

Unfortunately, the material for the PVK in the summer of 2015 is not available anymore.

Unfortunately, the material for the PVK in the summer of 2014 is not available anymore.

Unfortunately, the material for the "Elektromagnetische Felder & Wellen" lecture given by Prof. Novotny is not available anymore.

Unfortunately, the extra exercises I created to prepare for the various small tests during the semester as well as other extra material helpful for the "Digitaltechnik" lecture given by Prof. Tröster is not available anymore.