Raul Martinez

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Present work deals with the automation of a low cost commercial lawnmower to perform unmanned precision agriculture tasks such are the spraying of pesticides. To this aim the vehicle has been endowed with a set of additional subsystems and sensors to perform remote motion control and to obtain relative and absolute location in the field. The equipment(More)
This article proposes a novel, reduced complexity, block-adaptive digital predistortion (DPD) technique for mitigating the spurious emissions that occur when amplifying spectrally noncontiguous signals with a nonlinear power amplifier (PA). The introduced DPD solution is designed for real-time scenarios where a loop delay exists in the DPD system. By a(More)
The scalability of Network-on-Chip (NoC) designs has become a rising concern as we enter the many core era. Multicast support represents a particular yet relevant case within this context and has been the focus of different research efforts, mainly due to the poor performance of NoCs in the presence of this increasingly important type of traffic. However,(More)
Multicast on-chip communications are expected to become an important concern as the number of cores grows and we reach the manycore era. The increasing importance such traffic flows directly contrasts with the diminishing multicast performance of current Network-on-Chip (NoC) designs, and has lead to a surge of research works that seek to improve on-chip(More)
A blind watermarking algorithm for digital video resilient to MPEG-2 compression combined with several attacks is proposed. The proposed algorithm embeds binary visually recognizable patterns, such as the owner's logotype, in the DWT domain of some randomly selected video frames. To increase the security, the watermark data is transformed into a noise-like(More)
In this paper we propose an adaptive data hiding method that divides the host image in suitable and ineligible blocks. This classification is based on the DCT energy features from the horizontal, vertical and diagonal frequency information. Only the suitable blocks are used for data embedding using quantization index modulation (QIM). After the composite(More)
The scalability of Network-on-Chip (NoC) designs has become a rising concern as we enter the manycore era. Multicast support represents a particular yet relevant case within this context, mainly due to the poor performance of NoCs in the presence of this type of traffic. Multicast techniques are typically evaluated using synthetic traffic or within a full(More)
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