Visible Light Communication (VLC) is an emerging eld in Optical Wireless Com- munication (OWC) which utilizes the superior modulation bandwidth of Light Emitting Diodes (LEDs) to transmit data. In modern day communication systems, the most pop- ular frequency band is Radio Frequency (RF) mainly due to little interference and good coverage. However, the rapidly dwindling RF spectrum along with…
Tags: 2015 OMNeT++ Projects
10.2 An FSK plastic waveguide communication link in 40nm CMOS
Technology scaling has enabled RF-CMOS circuits that operate in the millimeter-wave frequency range (30 to 300GHz) where large bandwidths are available. These bandwidths can be exploited to increase data-rates of wireless communication links. Unfortunately, free-space path loss (FSPL) limits the operating distance of wireless systems at these frequencies. A 5-meter link at 120GHz has an FSPL as…
Real-Time Communication for the Internet of Things Using jCoAP
The term Internet of Things (IoT) describes a scenario where embedded systems are integrated into everyday objects, turning them into smart devices to assist the user in his everyday life. Each of these smart objects only offers a very limited amount of computational power since it is only specialized in a limited set of tasks.…
Liar, Liar, IM on Fire: Deceptive language-action cues in spontaneous online communication
With an increasing number of online users, the potential danger of online deception grows accordingly – as does the importance of better understanding human behavior online to mitigate these risks. One critical element to address such online threat is to identify intentional deception in spontaneous onlinecommunication. For this study, we designed an interactive online game…
Modulation Classification of Single-Input Multiple-Output Signals Using Asynchronous Sensors
This paper discusses the automatic modulation classification of weak communication signals using distributed low-cost sensors. The concept of a secondary user in sensor networks is presented and very high-order statistics are used as modulation features. Two feature-based methods, single-variable and multivariable modulation classifiers, are proposed for estimating unknown modulation schemes through single-input multiple-output signal sensing channels. The…
Bit error rate of underlay decode-and-forward cognitive networks with best relay selection
This paper provides an analytic performance evaluation of the bit error rate (BER) of underlay decode-and-forward cognitive networks with best relay selection over Rayleigh multipath fading channels. A generalized BER expression valid for arbitrary operational parameters is firstly presented in the form of a single integral, which is then employed for determining the diversity order and coding gain…
A Cognitive Approach for Performance Enhancement of Wireless Mesh Networks
Providing the required quality of service (QoS) for clients in a wireless mesh network (WMN) is a challenging task. This is due to the complex architecture of the WMN and unpredictable behavior of the wireless links and the intermediate nodes. This can be alleviated by introducing a cognitive mechanism within the WMN. In this paper, a WMN is developed,…
Using BIP to reinforce correctness of resource-constrained IoT applications
Internet of Things (IoT) systems process and respond to multiple (external) events, while performing computations for a Sense-Compute-Control (SCC) or a Sense-Only (SO) goal. Given the limitations of the interconnected resource-constrained devices, the execution environment can be based on an appropriate operating system for the IoT. The development effort can be reduced, when applications are built…
Spectrum Sensing With Small-Sized Data Sets in Cognitive Radio: Algorithms and Analysis
Spectrum sensing is a fundamental component of cognitive radio (CR). How to promptly sense the presence of primary users (PUs) is a key issue to a CR network. The time requirement is critical in that violating it will cause harmful interference to the PU, leading to a system-wide failure. The motivation of this paper is to provide an effective…
On the double threshold energy detection-based spectrum sensing over κ-μ fading channel
This paper presents the performance analysis of spectrum sensing systems based on double threshold energy detection over κ-μ fading channels, which represents the small-scale variations of the fading signal under both light-of-sight and multipath scenarios. Receiver Operation Characteristics (ROC) are obtained regarding the double threshold scheme and comparisons are performed against the traditional single threshold…