Mariano López

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This paper shows the analysis and design of a parallel-connected converter system using sliding mode control techniques. The design is particularised for a system that consists of boost converters and a current feedback loop based on a proportional–integral compensator of the output voltage error. The paper emphasises the advantages of the sliding-mode(More)
This work aims to pave the way for an efficient open system architecture applied to embedded electronic applications to manage the processing of computationally complex algorithms at real-time and low-cost. The target is to define a standard architecture able to enhance the performance-cost trade-off delivered by other alternatives nowadays in the market(More)
Fingerprint recognition is one of the most common techniques used for biometric identification. Currently fingerprint technology is suitable to recognize users with high accuracy and low execution times using microprocessors able to solve algorithms with high-computational cost. However, the microprocessor’s cost could make the use of fingerprint biometric(More)
Dynamically reconfigurable FPGAs are usually based on internal SRAM configuration memory, that can be fully or partially written from an external device. One of their applications is to map reconfigurable coprocessors, so an external microprocessor can change during run-time the coprocessor mapped on a FPGA. Coprocessors can execute the time-critical tasks(More)
This paper describes the architecture and design flow of a self-reconfigurable embedded system, mapped on Spartan-3 low-cost FPGA. The proposed design flow combines EDK and ISE software along with an ownmade tool, in order to create a self-reconfigurable system able to map a reconfigurable OPB coprocessor. A fixed area of the FPGA is reserved to accommodate(More)
This paper describes the implementation of an iris recognition algorithm based on hardware-software co-design. The system architecture consists of a general-purpose 32bit microprocessor and several slave coprocessors that accelerate the most intensive calculations. The whole iris recognition algorithm has been implemented on a low-cost Spartan 3 FPGA,(More)
The current technological age demands the deployment of biometric security systems not only in those stringent and highly reliable fields (forensic, government, banking, etc.) but also in a wide range of daily use consumer applications (internet access, border control, health monitoring, mobile phones, laptops, etc.) accessible worldwide to any user. In(More)
The main aim of this paper is the development of a new technology for biometric recognition that allows safe and secure access to universal services such as credit card payment, ATMs, access control, border control, etc. The technology being developed is very generic and easily adaptable to the specific particularities of disabled people; a collective that(More)