Gianluca Piccinini

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A great interest has been gained in recent years by a new error-correcting code technique, known as “turbo coding,” which has been proven to offer performance closer to the Shannon’s limit than traditional concatenated codes. In this paper, several very large scale integration (VLSI) architectures suitable for turbo decoder implementation are proposed and(More)
The use of “turbo codes” has been proposed for several applications, including the development of wireless systems, where highly reliable transmission is required at very low signal-tonoise ratios (SNR). The problem of extracting the best coding gains from these kind of codes has been deeply investigated in the last years. Also the hardware implementation(More)
Very-large-scale integration (VLSI) architectures for finding the first W (W > 2) maximum (or minimum) values are required in the implementation of several applications such as nonbinary low-density-parity-check decoders, K-best multipleinput–multiple-output (MIMO) detectors, and turbo product codes. In this brief, a parallel radix-sort-based VLSI(More)
Molecular Quantum Dot Cellular Automata, also called mQCA, are among the most promising emerging technologies for the expected theoretical operating frequencies (THz), the high device densities and the non-cryogenic working temperature. Due to the small size of a mQCA cell, based on one or two molecules, the device prototyping and even a simple circuit(More)
The increased leakage, yield inefficiency, process, power supply and temperature variations have significant aftereffects on the performance of complex VLSI architectures especially if mapped on Ultra Deep Sub Micron (UDSM) technologies. In this paper we assess the technology trend based on three industrial technologies (90nm, 65nm and 45nm) using a state(More)
In this paper, a simple power-distribution electrothermal model including the interconnect self-heating is used together with a statistical model of average and rms currents of functional blocks and a high-level model of fanout distribution and interconnect wirelength. Following the 2001 SIA roadmap projections, we are able to predict a priori that the(More)
Molecular nanoelectronics is attracting much attention, because of the possibility to add functionalities to silicon-based electronics by means of intrinsically nanoscale biological or organic materials. The contact point between active molecules and electrodes must present, besides nanoscale size, a very low resistance. To realize Metal-Molecule-Metal(More)
Very low bit error rate has become an important constraint in high performance communication systems that operate at very low signal to noise ratios: due to their impressive coding gains, turbo codes have been proposed for several applications, although they suffer a large decoding delay. This paper presents the design of a turbo decoder with high(More)
This work presents a scalable Discrete Wavelet Transform architecture based on the B-spline factorization. In particular, we show that several wavelet filters of practical interest have a common structure in the distributed part of their B-spline factorization. This common structure is effectively exploited to achieve scalability and to save multipliers(More)