On Loss Functions for Supervised Monaural Time-Domain Speech Enhancement

Audio samples related to the experiments conducted in the paper M. Kolbæk et al. “On Loss Functions for Supervised Monaural Time-Domain Speech Enhancement” 2019 (https://arxiv.org/abs/1909.01019

Gabor Expansion for Simultaneous Wireless Power and Information Transfer (SWIPT): Interference Analysis

Wireless power transfer (WPT) has recently appealed the research community. One application for such technology is powering up future IoT devices and sensors. This article proposes a setup where both WPT and information transfer (IT) coexist sharing the same time and frequency resources in a flexible manner while keeping the interference at a low level. The interference of WPT on IT is analyzed as a performance metric for the proposed scheme. In particular, the influence of WPT side lobes on the main lobes of the information signal is computed to assess its impact on the performance of IT. The proposed scheme uses a Gabor expansion to create both power and information signals. This structure enables to assign resources for energy and information dynamically on the time-frequency lattice providing a high flexibility in the system. We propose to use the Gaussian basis functions to create the WPT signal since they are well localized both in time and in frequency, therefore creating the lowest possible interference on the nearby subcarriers. Hence, any multi-carrier system with different modulation schemes can be used for IT in the allowed time-frequency grid such as CP-OFDM and FBMC-OQAM. The expressions of interference are computed and simulation results show the low level of interference created by the power signal on the information signals which validates the possible coexistence of both systems

Algorithms for Reconstruction of Undersampled Atomic Force Microscopy Images Supplementary Material

Two Jupyter Notebooks showcasing reconstructions of undersampled atomic force microscopy images. The reconstructions were obtained using a variety of interpolation and reconstruction methods.Two Jupyter Notebooks showcasing reconstructions of undersampled atomic force microscopy images. The reconstructions were obtained using a variety of interpolation and reconstruction methods

Conservative cascades: an invariant of Internet traffic

Conservative cascades are among the class of multiscaling processes that accommodate the two competing objectives of deterministic and random cascades. This paper discusses in what sense the cascade model can be seen as an invariant of the Internet traffic. It explains why conservative cascades model the time-invariant properties of the Internet traffic at timescales up to hundreds of milliseconds. Furthermore, it shows the limitations of the conservative cascades to model part of the time-dependent scaling properties of Internet traffic.Anglai

Goodput optimized bit and power allocation for OFDM transmission with relaying

This paper considers point to point transmission over frequency selective channels by means of OFDM (orthogonal frequency division multiplexing), and enhanced by means of a decode-and-forward (DAF) relay. Assuming that perfect channel state information is available at the transmission side, this paper intends to solve the problems of power and bit allocation for goodput maximization. A greedy approach is proposed where the number of bits to be allocated is increased one at a time till a maximum value of the goodput is reached. The performance of the algorithm is illustrated with simulations, and compared with uniform power allocation and waterfilling approaches.Anglai

Entrywise Squared Transforms for GAMP Supplementary Material

Supplementary material for a study on Entrywise Squared Transforms for Generalized Approximate Message Passing (GAMP). See the README file for the details