A Bit-Slice Architecture for Sigma-Delta Analog to Digital Converters

The Sigma Delta analog to digital converters are based on the filtering and undersampling by the digital section of the one-bit output stream coming from the modulator. The structure of this section, consisting of a sinc cubic FIR filter decimator followed by an IIR decimator section, is discussed. It is ...

Applications of a Mid Infrared Free Electron Laser in Picosecond and Nonlinear Optical Spectroscopies

It has been suggested that the 1650 cm sup -1 band in low-temperature infrared spectrum of acetanilide is the absorption of nonlinear excitations similar to silitons in alpha-helices as proposed by Davydov. We report the picosecond transient bleaching experiments on polycrystalline acetanilide using the infrared free electron laser. The T ...

Concentration Dependence of the Octahedral Ti sup (4+) Center in LiNbO sub 3; Its Effect on Refractive Indices

X-ray absorption spectra of titanium-diffused LiNbO sub 3 indicate that a strong change in the Ti center appears as the concentration is increased above 5x10 sup 20 cm sup -3, involving a tendency toward displacement in the x-y plane and disorder. This change in the Ti center occurs within the ...

Squeezing the Most out of Eigenvalue Solvers on High-Performance Computers

This paper describes modification s to many of the standard algorithms used in computing eigenvalues and eigenvectors of matrices. These modifications can dramatically increase the performance of the underlying software on high-performance computers without resorting to assembler language, without significantly influencing the floating-point operation count, and without affecting the roundoff- ...

Network management automation in 5G: Challenges and opportunities

The development of 5G cellular networks is driven by several architectural and radio technology evolutions; and by require-ments of diverse uses cases from the vertical industries that will be supported. Combined, these drivers demand for new ap-proaches and processes to be applied towards the automation of Network Management (NM) tasks ...

Opportunistic and Partial Random Resource Reuse for Multiple D2D Communication in Cellular Networks

The third generation partnership project (3GPP) initiative to integrate device-to-device (D2D) communication within the cellular networks is premised on the high spectral efficiency gains during spectrum sharing and user quality of service (QoS) guarantees. However, the intra-cell interference between D2D and cellular users during spectrum sharing must be controlled to ...

Evolution towards Telco-Cloud: Reflections on Dimensioning, Availability and Operability

There are multiple drivers of moving away from physical implementation of telecommunication network elements towards software (SW) only deployments in all IP networks. One of the major motivations is the possibility to use commercial IT hardware as platform, due to cost efficiency and the common required experience for HW operation ...

Massive MIMO is a Reality - What is Next? Five Promising Research Directions for Antenna Arrays

Massive MIMO (multiple-input multiple-output) is no longer a "wild" or "promising" concept for future cellular networks--in 2018 it became a reality. Base stations (BSs) with 64 fully digital transceiver chains were commercially deployed in several countries, the key ingredients of Massive MIMO have made it into the 5G standard, the ...

Networks at the nexus of new value creation

Is the link between technology and productivity dead? This is a question on the minds of economists, policy makers and technocrats around the world. The decades old debate on the productivity paradox the global slowdown in productivity growth despite a rapid acceleration in technology progress still rages on. Bell Labs ...

A Learning Life-Cycle to Speed-up Autonomic Optical Transmission and Networking Adoption

Autonomic Optical Transmission and Networking requires from Machine Learning (ML) models to be trained with large datasets. However, the availability of enough real data to produce accurate ML models is rarely ensured since new optical equipment, techniques, etc., are continuously being deployed in the network. Although an option is to ...

E2E Analytics Framework for 5G Architecture

Data Analytics can be seen as a powerful tool which can be used by 5G system, to enable the transformation of the envisioned challenging 5G features into a reality. In current 5G architecture, some first steps have been performed in this direction, by introducing new functions in core and management ...

May AI Go Wrong? Case Studies.

For the successful implementation of AI models it is necessary to understand not only benefits but also potential limitations and biases of machine learning. In the talk, I am going to share with the audience several interesting examples of AI models, both thriving and with mistakes, continued with root cause ...

Variations of Heart Rate, Pulse Arrival Time and Blood Pressure in a Versatile Laboratory Protocol

This paper investigates widely used provocations such as controlled breathing, mental arithmetic and Stroop tests, Valsalva maneuver, cold pressor and muscle tension and combines them in a versatile laboratory protocol. The protocol was tested in an experiment where pulse arrival time (PAT) and heart rate (HR) were measured with chest ...

On Minimizing Energy Consumption for D2D Clustered Caching Networks

We formulate and solve the energy minimization problem for a clustered device-to-device (D2D) network with cache-enabled mobile devices. Devices are distributed according to a Poisson cluster process (PCP) and are assumed to have a surplus memory which is exploited to proactively cache files from a library. Devices can retrieve the ...

5G as an enabler for I4.0 industrial communications (TSN over 5G)

Invited talk for German forum microTEC Südwest within a special session on trends in industrial communications The talk introduces into 5G features for IIoT and into TSN. It provides concepts for integration of 5GS into TSN networks and the recent status in 3GPP.

Multi-level scheduling for network slicing

Network function virtualization (NFV) and cloud computing provide more flexibility and elasticity for mobile networks with the creation of network slicing. The slice orchestration and management allow multi-slices in the same cluster corresponding the various service demands. However, the single scheduling components could not be adapted the difference slice QoS ...