Browsing by Issue Date, starting with "2015-07-30"
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- CMOS indoor light energy harvesting system for wireless sensing applicationsPublication . Carvalho, Carlos Manuel Ferreira; Paulino, Nuno Filipe Silva VeríssimoThis book discusses in detail the CMOS implementation of energy harvesting. The authors describe an integrated, indoor light energy harvesting system, based on a controller circuit that dynamically and automatically adjusts its operation to meet the actual light circumstances of the environment where the system is placed. The system is intended to power a sensor node, enabling an autonomous wireless sensor network (WSN). Although designed to cope with indoor light levels, the system is also able to work with higher levels, making it an all-round light energy harvesting system. The discussion includes experimental data obtained from an integrated manufactured prototype, which in conjunction with a photovoltaic (PV) cell, serves as a proof of concept of the desired energy harvesting system. © 2016 Springer International Publishing. All rights are reserved.
- High performance IP core for HEVC quantizationPublication . Dias, Tiago; Roma, Nuno; Sousa, LeonelA new class of quantization architectures suitable for the realization of high performance and hardware efficient forward, inverse and unified quantizers for HEVC is presented. The proposed structures are based on a highly flexible and optimized integer datapath that can be configured to provide several pipelined and non-pipelined implementations, offering distinct trade-offs between performance and hardware cost, which makes them highly suitable for most video coding application domains. The experimental results obtained using a 90 nm CMOS process show that the proposed class of quantization architectures is able to process 4k UHDTV video sequences in real-time (3840 x 2160 @ 30fps), with a power consumption as low as 3.9 mW when the unified architecture is operated at 374 MHz.