Processing of high-frequency, wide-band signals is conveniently performed in the optical domain due to availability of optical filters which intrinsically have a wide-band response. On the other end, there are several application scenarios where very sharp pass-band filtering is required. In these cases, realizing the processing in the optical domain might not be technically simple, although filters of extremely high Q-factor have been demonstrated.
This paper presents the feasibility of signal processing based on very sharp electrical filtering (< 1 GHz around 193 THz) assisted by optical down-conversion, i.e., by means of optical coherent detection. In particular, we show experimentally two applications where the filtering capability is exploited to perform signal processing: the demodulation of phase-modulated optical signals and the implementation of a chirp-managed transmission link. Other possible applications of this technique will be also discussed at the presentation.
Continue Reading
IaaS clouds are becoming a standard way of providing elastic compute capacity at an affordable cost. To achieve that, VM provisioning system has to optimally allocate I/O and compute resources.…
In this paper, we propose the long range cooperative communication via high altitude platforms (HAPs). The HAPs are temporary platforms placed in the stratosphere, at the typical heights of 17-25…
The robustness of schedule schemes plays an important role for the smooth execution projects under uncertain conditions. This paper presents a new stochastic programming model about the bi-objective robust resource-constrained…
Senior citizens may suffer from a number of diseases, including but not limited to mild dementia and cognitive disabilities, which require either the institutionalization or the constant support from care-givers.…
A parallelized generation of Zadoff-Chu (ZC) and the Discrete Fourier Transform of Zadoff-Chu (ZC-DFT) sequences is proposed. In this algorithm, the sampling operation is completely eliminated for the ZC-DFT sequences…
Many embedded multi-core systems incorporate both dataflow applications with timing constraints and traditional real-time applications. Applying real-time scheduling techniques on such systems provides real-time guarantees that all running applications will…
This communication intends to summarize the recent strides carried out by the study of original Very Large Mode Area fibers (VLMA) that offer remarkable beam qualities. This work also aims…
Ionospheric time delay variations are highly variable and random in the low latitude Indian region. It is a key responsible parameter for the range error in Global Positioning System (GPS)…
Predicting performance metrics for cloud services is critical for real-time service assurance. We demonstrate a platform for estimating real-time service-level metrics. Statistical learning methods on device statistics are used to…