of the user spectrum separation provided by the filter bank. The mixing of multicarrier and single carrier modulations, which can be easily implemented, should be an important parameter for the optimization of future wireless and mobile networks.

in semiconductor processing technology have resulted in steady increases in integration levels. These advances have enabled the design of parallel systems within a single chip. For a single-chip orthogonal frequency division multiplexing (OFDM) transceiver incorporating a large FFT, hardware design optimization

in multiple applications, remote configuration, and actuation is still a big challenge. The purpose of this paper is to analyse and describe which mobility support can best be used in different scenarios, and how shared usage of mobile WSANs by multiple IP applications can best be scaled up. This paper

I first thank my thesis advisors Thiemo Voigt and Adam Dunkels for being my excellent advisors, and also for being the great colleagues you still are. Thiemo and Adam have complemented each other superbly, giving me feedback, perspectives, insights, and having made every single new venture truly

The distinctive properties of graphene, characterized by its high carrier mobility and biocompatibility, have stimulated extreme scientific interest as a promising nanomaterial for future nanoelectronic applications. In particular, graphene-based transistors have been developed rapidly

contribution is the closed-form derivation of the receiver bit decision variable for an arbitrary number of colliding signals and constellations of power ratios, time offsets, and carrier phase offsets. We systematically explore the factors for successful packet delivery under con-current transmissions across

Abstract—We investigate the problem of a monostatic pulse-Doppler radar transceiver trying to detect targets, sparsely populated in the radar’s unambiguous time-frequency region. Several past works employ compressed sensing (CS) algorithms to this type of problem, but either do not address sample

. The Virtual Personal Assistant (VPA) will enable the user to efficiently handle increasing demand of telephone calls, messages, meetings and other activities. The paper provides an overview of the VPA applications, and the expected features and future trends. The paper proposes as well a unified decision

heterojunction), with research emphasis on the mechanisms underlying material and device optimization, which sheds light on future material design for high efficiency solar cells and other organic electronic devices, such as organic light emitting diodes (OLEDs) and organic field effect transistors (OFETs

Vast majority of wireless appliances used in household, industry and medical field share the ISM frequency band. These devices need to coexist and thus are challenged to tolerate their mutual interference. One way of dealing with this is by using frequency hopping; where the device changes its radio channel periodically. Consequently, communications will not suffer from the same interference each time; instead, it should be fairer and more stable. This thesis investigates the aforementioned problem in the field of low power wireless sensor networks and Internet of Things where Contiki OS is used. We introduce a low-power pseudo-random frequency-hopping MAC protocol which is specifically characterized as a duty cycled asynchronous sender-initiated LPL style protocol. We illustrate two flavors of the protocol; one that does not use any dedicated channel and another which allows dedicated broadcast channels that can implement frequency-hopping as well. We implement