Istituto Superiore Mario Boella

Abstract: An optical phase locked loop (1), comprising an optical phase detector (2) receiving as inputs an optical signal to be locked ( symbol I ) and a locked optical signal (symbol II ) and providing as its output an electrical error signal (VPD) indicating the phase shift existing between the optical signal to be locked (symbol I ) and the locked optical signal (symbol II ); an electrical loop filter (3) receiving the electrical error signal (VPD) and outputting a filtered electrical error signal (VPDF), and an optical voltage controlled oscillator (4) receiving as an input the filtered electrical error signal (VPDF) and outputting the locked optical signal (symbol II ) The optical voltage controlled oscillator (4) comprises an electrical voltage controlled oscillator (8) receiving as an input the filtered electrical error signal (VPDF) and outputting a modulating electrical signal (VEVCO), an external-cavity semiconductor laser source (9) providing an optical carrier (Soc), and a Mach-Zehnder optical amplitude modulator (10) receiving as an input the optical carrier (Soc) and the modulating electrical signal (VEVCO) and outputting the locked optical signal (symbol II ), which is obtained by amplitude modulating the optical carrier (SOC) with the modulating electrical signal (VEVCO)

Abstract: Information and Communication Technologies (ICT) are considered a key instrument to improve efficiency and flexibility of industrial processes. This paper provides an experience report about the application of an ICT-based approach, derived from the Internet-of-Things (IoT) concept, to logistics in industrial manufacturing environments, aimed at enhancing awareness and control of logistic flows. The described solution performs assets management and inbound-outbound monitoring of goods by interconnecting business processes entities and devices providing physical-world data through an existing IoT-oriented middleware named VIRTUS. The VIRTUS Middleware, based on the open XMPP standard protocol and leveraging the OSGi framework, provides a scalable, agile, event-driven, network independent tool to manage an ecosystem of heterogeneous interconnected objects. The described solution has been validated within an actual industrial environment made of geographically-separated production plants.

Abstract: In this paper we propose a technique to implement in a parallel fashion a turbo decoder based on an arbitrary permutation, and to expand its interleaver in order to produce a family of prunable S-random interleavers suitable for parallel implementations. We show that the spread properties of the obtained interleavers are almost optimal and we prove by simulation that they are very competitive in terms of error floor performance. A few details on the decoder architecture are also provided