... land vehicle applications Christian Spagnol Department of Information Engineering University ... more ... land vehicle applications Christian Spagnol Department of Information Engineering University of Padova, Italy Email: akira28@libero.it Riccardo Muradore Department of Chemical Engineering University of Padova, Italy Email: muradore@dei.unipd.it Manolo Assom Giove Srl ...
ABSTRACT The low reliability of advanced CMOS devices has become a critical issue that can potent... more ABSTRACT The low reliability of advanced CMOS devices has become a critical issue that can potentially supersede the benefits of the technology shrinking process. This is making the design time reliability assessment and optimization a mandatory step in the IC design flow. As part of our ongoing research, we describe an algorithm based on probability analysis and logic principles for computing the impact of gate failures on the circuit output. We also propose a Bound and Propagate based methodology to handle the reconvergent fanout issue. A reliability evaluator has been developed around the open source logic synthesis tool 'abc' to allow integration and evaluation of our method in the context of an IC design flow. This approach had tremendously reduced the computation time while maintaining adequate precision. Simulation results for several benchmark circuits demonstrate the accuracy and the simulation time advantages when compared to MonteCarlo simulations.
This paper presents a high speed low complexity algorithm and architecture for encoding and decod... more This paper presents a high speed low complexity algorithm and architecture for encoding and decoding Reed-Solomon (RS) codes based on evaluation. The recursive use of discrepancy computation step of Berlekamp-Massey (BM) algorithm leads directly to the computation of message symbols without using Chien Search and Forney's Formula, making the circuitry much simpler for proposed decoder as compared to the classical decoder. Also, the proposed scheme requires less clock cycles compared to the classical decoder leading to reduced energy consumption. In order to make a fair comparison, classical and proposed decoder for RS codes over the field F256 has been implemented on TSMC 65nm ASIC process using some arithmetic units. For RS(255, 239) code, the proposed decoder has a total cell count of 16075 which results in a reduction of 57.6% in hardware area as compared to classical decoder. Also, 53.07% timing reduction is obtained with the proposed decoder.
ABSTRACT Telemedicine or mHealth systems can improve the quality of life of patients who need to ... more ABSTRACT Telemedicine or mHealth systems can improve the quality of life of patients who need to be monitored continuously. Not only will it allow them to stay at their own home with a higher level of mobility but also maintaining or even improving the accuracy of the diagnostic. Remote monitoring can enable information about the health status of all patients to be passed to the medical staff continuously for prolonged periods of time. Some of the vital physiological parameters for diagnostic are heart rate and heart rate variability. The calculation of these parameters relies on an accurate heartbeats detector (QRS complexes detector). In this work, two QRS detectors are proposed. They have been designed taking into account not only the accuracy, but also the computational complexity and the power consumption they require to analyze the electrocardiographic signal (ECG) in order to implement them on wearable platforms with different levels of constrained resources (integer numbers or floating point arithmetic). The complexity, power consumption and accuracy parameters of both algorithms are also analyzed.
ABSTRACT Nowadays, the technology advancements of sensors, low power mixed-signal/RF circuits, wi... more ABSTRACT Nowadays, the technology advancements of sensors, low power mixed-signal/RF circuits, wireless communication and Wireless Sensor Networks (WSNs) have enabled the design of compact, low power, high performance and low cost solutions for a wide range of applications, surveillance, building monitoring, sports/fitness, and of particular interesting are applications for health care. Novel sensors for human biomedical signal together with wireless connectivity and low power solutions are creating new opportunities for wearable devices which allow continuous monitoring together with freedom of movement of the users. This paper presents a low-power wearable sensor networks platform for on-body physiological measurements and wireless data communications. The platform hosts novel high sensitivity electric potential dry surface sensors that can be used in either contact or non-contact mode to measure ECG and EMG signals. Heart rate and respiration rate is performed runtime directly on the node. This approach reduces the amount of data than need to be transmitted, from raw measurement to analyzed data. In doing so the duty cycle of the radio has been reduced and the power consumption of the node optimized. Experimental measurements show the acquisition and processing of data from sensors and the low power consumption achieved with the node in different modalities.
ABSTRACT On resource constrained systems such as wireless sensing applications the need to have r... more ABSTRACT On resource constrained systems such as wireless sensing applications the need to have robust error-free communications is counterbalanced by the power and hardware requirements. The choice of Forward Error Correction (FEC) is an important factor in terms of area, power, and energy. This paper studies several implementations of the decoder for Reed-Solomon (RS) codes in Galois Field GF(28), and compares the advantages to be had in using close form solutions for the key equation compared with more traditional iterative approach. Moreover we investigate the hardware implementation of an alternative method to the Chien search to find root of a polynomial over GF(2m).
... land vehicle applications Christian Spagnol Department of Information Engineering University ... more ... land vehicle applications Christian Spagnol Department of Information Engineering University of Padova, Italy Email: akira28@libero.it Riccardo Muradore Department of Chemical Engineering University of Padova, Italy Email: muradore@dei.unipd.it Manolo Assom Giove Srl ...
ABSTRACT The low reliability of advanced CMOS devices has become a critical issue that can potent... more ABSTRACT The low reliability of advanced CMOS devices has become a critical issue that can potentially supersede the benefits of the technology shrinking process. This is making the design time reliability assessment and optimization a mandatory step in the IC design flow. As part of our ongoing research, we describe an algorithm based on probability analysis and logic principles for computing the impact of gate failures on the circuit output. We also propose a Bound and Propagate based methodology to handle the reconvergent fanout issue. A reliability evaluator has been developed around the open source logic synthesis tool 'abc' to allow integration and evaluation of our method in the context of an IC design flow. This approach had tremendously reduced the computation time while maintaining adequate precision. Simulation results for several benchmark circuits demonstrate the accuracy and the simulation time advantages when compared to MonteCarlo simulations.
This paper presents a high speed low complexity algorithm and architecture for encoding and decod... more This paper presents a high speed low complexity algorithm and architecture for encoding and decoding Reed-Solomon (RS) codes based on evaluation. The recursive use of discrepancy computation step of Berlekamp-Massey (BM) algorithm leads directly to the computation of message symbols without using Chien Search and Forney's Formula, making the circuitry much simpler for proposed decoder as compared to the classical decoder. Also, the proposed scheme requires less clock cycles compared to the classical decoder leading to reduced energy consumption. In order to make a fair comparison, classical and proposed decoder for RS codes over the field F256 has been implemented on TSMC 65nm ASIC process using some arithmetic units. For RS(255, 239) code, the proposed decoder has a total cell count of 16075 which results in a reduction of 57.6% in hardware area as compared to classical decoder. Also, 53.07% timing reduction is obtained with the proposed decoder.
ABSTRACT Telemedicine or mHealth systems can improve the quality of life of patients who need to ... more ABSTRACT Telemedicine or mHealth systems can improve the quality of life of patients who need to be monitored continuously. Not only will it allow them to stay at their own home with a higher level of mobility but also maintaining or even improving the accuracy of the diagnostic. Remote monitoring can enable information about the health status of all patients to be passed to the medical staff continuously for prolonged periods of time. Some of the vital physiological parameters for diagnostic are heart rate and heart rate variability. The calculation of these parameters relies on an accurate heartbeats detector (QRS complexes detector). In this work, two QRS detectors are proposed. They have been designed taking into account not only the accuracy, but also the computational complexity and the power consumption they require to analyze the electrocardiographic signal (ECG) in order to implement them on wearable platforms with different levels of constrained resources (integer numbers or floating point arithmetic). The complexity, power consumption and accuracy parameters of both algorithms are also analyzed.
ABSTRACT Nowadays, the technology advancements of sensors, low power mixed-signal/RF circuits, wi... more ABSTRACT Nowadays, the technology advancements of sensors, low power mixed-signal/RF circuits, wireless communication and Wireless Sensor Networks (WSNs) have enabled the design of compact, low power, high performance and low cost solutions for a wide range of applications, surveillance, building monitoring, sports/fitness, and of particular interesting are applications for health care. Novel sensors for human biomedical signal together with wireless connectivity and low power solutions are creating new opportunities for wearable devices which allow continuous monitoring together with freedom of movement of the users. This paper presents a low-power wearable sensor networks platform for on-body physiological measurements and wireless data communications. The platform hosts novel high sensitivity electric potential dry surface sensors that can be used in either contact or non-contact mode to measure ECG and EMG signals. Heart rate and respiration rate is performed runtime directly on the node. This approach reduces the amount of data than need to be transmitted, from raw measurement to analyzed data. In doing so the duty cycle of the radio has been reduced and the power consumption of the node optimized. Experimental measurements show the acquisition and processing of data from sensors and the low power consumption achieved with the node in different modalities.
ABSTRACT On resource constrained systems such as wireless sensing applications the need to have r... more ABSTRACT On resource constrained systems such as wireless sensing applications the need to have robust error-free communications is counterbalanced by the power and hardware requirements. The choice of Forward Error Correction (FEC) is an important factor in terms of area, power, and energy. This paper studies several implementations of the decoder for Reed-Solomon (RS) codes in Galois Field GF(28), and compares the advantages to be had in using close form solutions for the key equation compared with more traditional iterative approach. Moreover we investigate the hardware implementation of an alternative method to the Chien search to find root of a polynomial over GF(2m).
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