—We consider the joint design of polar coding and higher-order modulation schemes for ever increased spectral efficiency. The close connection between the polar code construction and the multi-level coding approach is described in detail. Relations between different modulation schemes such as bit-interleaved coded modulation (BICM) and multi-level coding… (More)
Atomistic simulation of nanowires in the sp3d5s* tight-binding formalism: From boundary conditions to strain calculations" (2006). As the active dimensions of metal-oxide field-effect transistors are approaching the atomic scale, the electronic properties of these " nanowire " devices must be treated on a quantum mechanical level. In this paper, the… (More)
In this paper we present decision-feedback differential detection (DF-DD) schemes for autocorrelation-based detection in impulse-radio ultra-wideband (IR-UWB) systems, a signaling scheme regarded as a promising candidate in particular for low-complexity wireless sensor networks. To this end, we first discuss ideal noncoherent sequence estimation and… (More)
—Matched decoding is a technique that enables the efficient maximum-likelihood sequence estimation of convolution-ally encoded PAM-transmission over ISI-channels. Recently, we have shown that the super-trellis of encoder and channel can be described with significantly fewer states without loss in Euclidean distance, by introducing a non-linear… (More)
A parallel sparse linear solver for nearest-neighbor tight-binding problems" (2008).
—In this paper we propose a matched encoding (ME) scheme for convolutionally encoded transmission over intersymbol interference (usually called ISI) channels. A novel trellis description enables to perform equalization and decoding jointly, i.e., enables efficient super-trellis decoding. By means of this matched non-linear trellis description we can… (More)
—Power efficiency of noncoherent receivers for impulse-radio ultra-wideband (IR-UWB) transmission systems can significantly be improved, on the one hand, by employing multiple-symbol differential detection (MSDD), and, on the other hand, by providing reliability information to the subsequent channel decoder. In this paper, we combine these two techniques.… (More)
—THIS PAPER IS ELIGIBLE FOR THE STUDENT PAPER AWARD In classic trellis-coded modulation (TCM) signal constellations of twice the cardinality are applied when compared to an uncoded transmission enabling transmission of one bit of redundancy per PAM-symbol, i.e., rates of K K+1 when 2 K+1 denotes the cardi-nality of the signal constellation. In order to… (More)