Learn More
—A simple statistical model of azimuthal and temporal dispersion in mobile radio channels is proposed. The model includes the probability density function (pdf) of the delay and az-imuth of the impinging waves as well as their expected power conditioned on the delay and azimuth. The statistical properties are extracted from macrocellular measurements(More)
The most critically ill patients in the hospital are located in the ICU. Due to intensive individualized care and monitoring, these patients often suffer from severe sleep deprivation. The amount and continuity of sleep as well as normal sleep architecture are all affected. Moreover, by impairing protein synthesis, cell division, and cellular immunity,(More)
We present a joint message passing approach that combines belief propagation and the mean field approximation. Our analysis is based on the region-based free energy approxi­ mation method proposed by Yedidia et al., which allows to use the same objective function (Kullback-Leibler divergence) as a starting point. In this method message passing fixed point(More)
For fast link adaptation (FLA) algorithm, link quality metrics (LQMs) are presented for IEEE 802.11n WLAN systems with convolutional coding and higher order modulations. The LQMs estimate the PER of an instantaneous fading channel such that the FLA technique can dynamically select a suitable modulation and coding scheme (MCS) which fulfills a PER objective.(More)
Sparse modeling and estimation of complex signals is not uncommon in practice. However, historically , much attention has been drawn to real-valued system models, lacking the research of sparse signal modeling and estimation for complex-valued models. This paper introduces a unifying sparse Bayesian formalism that generalizes to complex-as well as(More)
– A stochastic radio channel model (SRCM) for broadband indoor mobile systems operating at 5.2 and 17 GHz has been derived within the ACTS project AC085 Magic WAND. The SRCM was designed to accurately describe the time, frequency, direction, and polarization dispersive characteristic of real radio channels because these effects are important for the design(More)