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- Andreas Winkelbauer
- ArXiv
- 2012

We present formulas for the (raw and central) moments and absolute moments of the normal distribution. We note that these results are not new, yet many textbooks miss out on at least some of them. Hence, we believe that it is worthwhile to collect these formulas and their derivations in these notes.

- Andreas Winkelbauer, Gerald Matz
- ICC
- 2012

In this paper we consider the time-division multipleaccess relay channel (MARC). We propose a low-complexity compress-and-forward-based transmission scheme that consists of a scalar quantization of log-likelihood ratios (LLRs), followed by a suitably defined network code. This scheme is well suited also for asymmetric source-relay channel conditions. We use… (More)

- Andreas Winkelbauer, Gerald Matz
- 2014 48th Annual Conference on Information…
- 2014

We study the maximum rate achievable over a Gaussian channel with Gaussian input under channel output compression. This problem is relevant to receive signal quantization in practical communication systems. We use the Gaussian information bottleneck to provide closed-form expressions for the information-rate function and the rate-information function, which… (More)

- Andreas Winkelbauer, Stefan Farthofer, Gerald Matz
- 2014 IEEE International Symposium on Information…
- 2014

We consider lossy compression of the output of a Gaussian vector channel. This is relevant for quantizer design in rate-limited feedback and in receiver front-ends. In particular, we study the trade-off between compression rate and mutual information between channel input and compressed channel output. Using the Gaussian information bottleneck we provide… (More)

- Andreas Winkelbauer, Gerald Matz
- 2011 International Symposium on Networking Coding
- 2011

We consider network coding for the time-division two-way relay channel (TWRC). Based on achievable rates, we study the optimal transmission time allocation for a three-phase transmission protocol. While existing network coding schemes for the TWRC perform "hard" network coding, we propose a novel soft-information-based joint network-channel coding scheme. A… (More)

- Andreas Winkelbauer, Gerald Matz, Andreas Peter Burg
- ACSSC
- 2013

We consider the problem of channel-optimized vector quantization (COVQ) with mutual information as fidelity criterion. This problem is relevant in a communications context, where the goal is to maximize the end-to-end rate. We propose an algorithm which is similar to the information bottleneck method and solves the considered COVQ problem. In contrast to… (More)

- Johannes Gonter, Norbert Goertz, Andreas Winkelbauer
- Wireless Days
- 2012

The calculation of exact outage probabilities in delayconstrained multiuser-systems has been an unsolved problem. This paper introduces an analytical method to calculate the probability of an outage for max-based schedulers, which take a scheduling decision by choosing the user with an associated maximum metric. While this analysis is, therefore, suited for… (More)

- Andreas Winkelbauer, Gerald Matz
- 2011 IEEE International Conference on Acoustics…
- 2011

We study efficient algorithms for soft-input soft-output (SISO) encoding of convolutional codes. While the BCJR algorithm has been suggested for SISO encoding, we show that a forward recursion on the code's trellis is sufficient to compute the a posteriori probabilities of the code bits. We further propose a shift-register based SISO encoding algorithm for… (More)

- A WINKELBAUER
- Wiener klinische Wochenschrift
- 1953

Aiming at improvements in traffic safety and efficiency, dependable infrastructure-to-vehicle (V2I) communication links for intelligent transportation systems require an adequate deployment of roadside units (RSU). However, evaluating the dependence of key system performance indicators on RSU deployment conditions through field tests is expensive,… (More)