abiri@home

Developing, specifying, and coordinating embedded control applications as part of the wireless sub-system of an industry-leading hearing aid.

• Embedded software development for hearing instruments in modern C++ on a proprietary lowpower ASIC
• Design, implementation, and testing of an extensive code base for wireless communication using 2.4 GHz (Bluetooth Classic, BLE, and proprietary protocols)
• Technical lead for a product improvement update of the microcontroller software
• Primary point of contact for internal stakeholders for embedded software subsystem development
• Planning and execution of stabilization phases to adhere to medical device regulations

Designing cutting-edge wireless protocols, developing novel sensing systems, and building and testing the designs under harsh alpine environments.

• Publication of 4 first-author papers, presentations at 4 first-class conferences, support of 10 papers with collaborators
• Development and programming of PCBs for acoustic sensing and wireless communication (sub GHz, LoRa, 2.4 GHz, cellular)
• Maintainance and extension of indoor and outdoor (alpine) sensor testbeds
• Teaching assistant for two courses with more than 200 students on Embedded Systems and Computer Systems
• Mentoring and close supervision of more than 10 students for their semester and Master theses

Designing, evaluating and implementating a two-way communication link over Long Range Bluetooth in-between laser measurement stations

• Embedded systems software design on two proprietary platforms in commercial use
• Programming 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.

Here you can find all the necessary material for the PVK in the summer of 2015.

Here, you can find all the necessary material for the PVK in the summer of 2014.

Here, you can find material which is helpful for the "Elektromagnetische Felder & Wellen" lecture given by Prof. Novotny.

Some 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.