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- Marcus Brandenburger, Christian Cachin, Matthias Lorenz, RÃ¼diger Kapitza
- 2017 47th Annual IEEE/IFIP Internationalâ€¦
- 2017

Novel hardware-aided trusted execution environments, as provided by Intel's Software Guard Extensions (SGX), enable to execute applications in a secure context that enforces confidentiality andâ€¦ (More)

- Stefan Brenner, Colin Wulf, +5 authors RÃ¼diger Kapitza
- Middleware
- 2016

Cloud computing, while ubiquitous, still suffers from trust issues, especially for applications managing sensitive data. Third-party coordination services such as ZooKeeper and Consul are fundamentalâ€¦ (More)

- Matthias Lorenz, Timon BrÃ¼ckner, Rudolf Ritter, Maurits Ortmanns
- 2013 IEEE International Symposium on Circuits andâ€¦
- 2013

In this work, a method for the concurrent estimation of nonidealities in continuous-time sigma-delta modulators is presented. Several nonidealities can degrade the performance of a sigma-deltaâ€¦ (More)

- Timon BrÃ¼ckner, Matthias Lorenz, Christoph Zorn, Joachim Becker, Wolfgang Mathis, Maurits Ortmanns
- IEEE Transactions on Circuits and Systems IIâ€¦
- 2012

In this brief, a hardware-accelerated simulation environment for continuous-time (CT) <formula formulatype="inline"><tex Notation="TeX">$\Sigma\Delta$</tex></formula> modulators is presented. Due toâ€¦ (More)

- Timon BrÃ¼ckner, Martin Kiebler, Matthias Lorenz, Christoph Zorn, Wolfgang Mathis, Maurits Ortmanns
- 2013 IEEE International Symposium on Circuits andâ€¦
- 2013

In this paper, a new method of calculating the transfer functions of continuous-time (CT) sigma-delta modulators is presented. The common approach of calculating the transfer functions is to analyzeâ€¦ (More)

- Rudolf Ritter, Matthias Lorenz, Maurits Ortmanns
- 2015 IEEE International Symposium on Circuits andâ€¦
- 2015

This paper describes a fundamental limitation of the implicit anti-aliasing filter in continuous-time feedback compensated sigma-delta modulators and a method to overcome it. This anti-aliasingâ€¦ (More)

- Ulrich Bihr, Hongcheng Xu, Christoph Bulach, Matthias Lorenz, Jens Anders, Maurits Ortmanns
- 2014 IEEE 12th International New Circuits andâ€¦
- 2014

This paper presents an analysis of the effectiveness of delta compression (DC) with additional entropy encoding, referred to as modified delta compression (MDC), as real-time compression scheme forâ€¦ (More)

- Matthias Lorenz, Michael Maurer, Yiannos Manoli, Maurits Ortmanns
- 2012 19th IEEE International Conference onâ€¦
- 2012

In this work, a method for the estimation of filter nonidealities in continuous-time sigma-delta modulators is presented. Nonidealities in the filter of a sigma-delta modulator are having aâ€¦ (More)

- Matthias Lorenz, Timon BrÃ¼ckner, Rudolf Ritter, Jens Anders, Maurits Ortmanns
- 2014 IEEE International Symposium on Circuits andâ€¦
- 2014

In this work, an unscented Kalman filter with improved numerical properties is shown to be able to simultaneously estimate the major nonidealities of continuous-time sigma-delta modulators. Circuitâ€¦ (More)

- Matthias Lorenz, Rudolf Ritter, Jens Anders, Maurits Ortmanns
- IEEE Transactions on Circuits and Systems Iâ€¦
- 2015

In this paper, an enhanced unscented Kalman filter is used for the estimation of non-idealities in sigma-delta modulators. As sigma-delta modulator based analog-to-digital converters are known to beâ€¦ (More)