Automatic Smile and Frown Recognition with Kinetic Earables

In this paper, we introduce inertial signals obtained from an ear- able placed in the ear canal as a new compelling sensing modality for recognising two key facial expressions: smile and frown. Bor- rowing principles from Facial Action Coding Systems (FACS), we first demonstrate that an inertial measurement unit of ...

Dynamic Switch Migration in Distributed Software-Defined Networks to Achieve Controller Load Balance

© 1983-2012 IEEE. Multiple distributed controllers have been used in software-defined networks (SDNs) to improve scalability and reliability, where each controller manages one static partition of the network. In this paper, we show that dynamic mapping between switches and controllers can improve efficiency in managing traffic load variations. In particular, ...

Adiabatic mode converters for silicon photonics: Power and polarization broadband manipulators

Broadband, low-loss, and fabrication-tolerant photonic passives are of paramount importance in any photonic integrated circuit (PIC). Among others, the adiabatic couplers can have those merits premised on their one-to-one mode transformation characteristics. These devices are usually designed comprising linear waveguide tapers and have typical lengths of 1 mm, in order ...

Lightweight Security for the Internet of Things: A Soft Introduction to Physical Unclonable Functions

© 1988-2012 IEEE. It is clearly redundant to extensively discuss the upcoming era of 5G and pervasive computing or, in other words, the Internet of Things (IoT). Scientific and industrial communities have been analyzing the design challenges, architectures, and security requirements of our brandnew, all-connected world for quite some time ...

Accurate quality of transmission estimation with machine learning

In optical transport networks the quality of transmission (QoT) is estimated before provisioning new connections or upgrading existing ones. Traditionally, a physical layer model (PLM) is used for QoT estimation coupled with high margins to account for the model inaccuracy and the uncertainty in the evolving physical layer conditions. Reducing ...

Measurements of Beamswitching Gains and Fade Dynamics for 28 GHz Indoor Static Links in the Presence of Pedestrian Traffic

We measured channel dynamics for fixed wireless indoor channels at 28 GHz. We characterize pedestrian-induced fades in open indoor spaces and the effectiveness of beamswitching to mitigate them. We find that fades of the dominant propagation path may be as deep as 9 dB at the 90th percentile and that ...

Lightweight Security for the IoT: a soft introduction to Physical Unclonable Functions

It is clearly redundant to extensively discuss the upcoming era of 5G and pervasive computing or, in other words, the Internet of Things (IoT). Scientific and industrial communities have been analyzing the design challenges, architectures, and security requirements of our brandnew, all-connected world for quite some time now, and standardization ...

Efficient algorithms for coded multicasting in heterogeneous caching networks

Coded multicasting has been shown to be a promising approach to significantly improve the performance of content delivery networks with multiple caches downstream of a common multicast link. However, the schemes that have been shown to achieve order-optimal performance require content items to be partitioned into several packets that grows ...

Capacity Scaling of Wireless Networks: Protocol Limited or Model Limited?

Given a large wireless network deployed within an area, where each node wants to transmit to a random destination node within the network at some given rate, how fast can the sum rate grow as the number of nodes scales up? Previous work have shown that, multi-hop routing provides a ...

High-performance balun for a dual-polarised dipole antenna

© The Institution of Engineering and Technology 2018 This study proposes a detailed analysis on the operation of a high-performance balun for a dual-polarised dipole antenna. The main feature of this balun is to transform a coaxial feed into a differential feed which can enable very high performance for dual-polarised ...

High-Performance Balun for a Dual-Polarized Dipole Antenna

This paper proposes a detailed analysis on the operation of a high-performance balun for a dual-polarized dipole antenna. The main feature of this balun is to transform a coaxial feed into a differential feed which can enable very high performance for dual-polarized configurations. First, we identify the key factors that ...

The Effects of Housing Environments on the Performance of Activity-Recognition Systems Using Wi-Fi Channel State Information - An Exploratory Study

Recently, device-free human activity monitoring systems using commercial WiFi devices have demonstrated a great potential to support smart home environments. These systems exploit Channel State Information (CSI), which represents how human activity-based environmental changes affect the WiFi signals propagating through physical space. However, given that WiFi signals either penentrate through ...

AIDE: Augmented Onboarding of IoT Devices at Ease

to onboard them so that they can be initialized and connected to the infrastructure. This requires mapping each physical device with its digital identity. Doing so manually is tedious, error-prone and not scalable. In this paper, we propose AIDE, a mechanism that provides Augmented onboarding of IoT Devices at Ease. ...

End-to-End Learning of Communications Systems Without a Channel Model

The idea of end-to-end learning of communications systems through neural network (NN)-based autoencoders has the shortcoming that it requires a differentiable channel model. We present in this paper a novel learning algorithm which alleviates this problem. The algorithm iterates between supervised training of the receiver and reinforcement learning (RL)-based training ...

Coordinated Multi-Point Massive MIMO Cellular Systems with Sectorized Antennas

Non-cooperative cellular Massive MIMO, combined with max-min power control, is known to give huge improvements in per-user service compared with conventional 4G technology. We investigate further refinements to Massive MIMO, first, in the form of three-fold sectorization, which can be viewed as an e ective reduction in cell size, and ...

5G New Radio: Overview and Performance

The 3GPP New Radio (NR) is a unified, flexible air interface that supports the three main categories for 5G communications as de-fined by the ITU: enhanced mobile broadband, ultra-reliable low-latency communication, and massive internet of things. NR can also support various 5G vertical applications such as those in the automotive ...

H-BLADE: A Bayesian Probabilistic GNSS/LTE-OTDOA Hybrid Localization Algorithm for Harsh Environments

For global navigation satellite systems (GNSS), performance in harsh environments such as urban canyons and indoors can be improved by leveraging cellular localization systems. In this paper, we propose an algorithm, known as the Hybrid Bell Labs Localization Algorithm with channel bias Distribution Estimation (H-BLADE), which fuses measurements from GNSS ...

Performance Evaluation of an Adaptive Self-Organizing Frequency Reuse Approach for OFDMA Downlink

Orthogonal frequency division multiple access (OFDMA) is extensively utilized for the downlink of cellular systems such as long term evolution (LTE) and LTE Advanced (LTE-A). In OFDMA cellular networks, orthogonal resource blocks (RBs) can be used within each cell. However, the available resources are rare and so those resources have ...

Uplink Pilot Allocation for Multi-Cell Massive MIMO Systems

Pilot contamination due to the pilot reuse in adjacent cells is a very serious problem in massive multi-input multiple-output (MIMO) system. Therefore, the pilot allocation is significant for improving the performance of the system. In this paper, we formulate the pilot allocation optimization problem for maximizing uplink sum rate of ...