₹35,000.00Original price was: ₹35,000.00.₹16,000.00Current price is: ₹16,000.00.
Source : Verilog HDL
Abstract:
High-resolution sinusoidal pulse width modulation (SPWM) switching is beneficial in order to achieve compact size and fine sinusoidal output of dc–ac converters. In this article, a novel field-programmable gate array (FPGA) based high-definition SPWM (HD-SPWM) architecture is proposed for adopting a scheme of integrating a lower frequency PWM train to a high-frequency SPWM train in order to suppress inverter output harmonics while achieving high resolution output. An optimized FPGA based two-stage finite-state-machine (FSM) architecture is designed, where the initial stage decides pulse widths of a lower frequency PWM train based on the premeditated pulse width of the high-frequency SPWM train, whereas in the final stage, lower frequency PWM pulse widths are integrated with the high-frequency SPWM pulse widths to generate updated pulse widths of high-frequency SPWM, i.e., HD-SPWM. Moreover, a pre-formulation mathematical model is established for the calculation of duty-cycle count values of pulse trains to support the online adjustment of modulation index (MI) of the HD-SPWM. The proposed generation has the benefits of harmonic mitigation, online fine adjustment of MI, low-processing time, and requirement of a minor segment of a medium-sized FPGA; thereby, providing a good tradeoff between larger designs and higher performance. Theoretical calculations, characteristics, and design contemplations are specified, and the HD-SPWM generation is demonstrated through experimentation with a Xilinx Spartan-3 FPGA board.
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This paper presents two new line-coding schemes, integrated pulse width modulation (iPWM) and consecutive digit chopping (CDC) for equalizing lossy wire line channels with the aim of achieving energy efficient wire line communication. The proposed technology friendly encoding schemes are able to overcome the fundamental limitations imposed by Manchester or pulse-width modulation encoding on high-speed wire line transceivers. A highly digital encoder architecture is leveraged to implement the proposed iPWM and CDC encoding. Energy-efficient operation of the proposed encoding is demonstrated on a high-speed wire line transceiver that can operate from 10 to 18 Gb/s. Fabricated in a 65-nm CMOS process, the transceiver operates with supply voltages of 0.9 V, 1 V, and 1.1 V. With the help of the proposed iPWM encoding, the transceiver can equalize over 27-dB of channel loss while operating at 16 Gb/s with an efficiency of 4.37 pJ/bit. The design occupies an active die area of 0.21 mm2.
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₹20,000.00Original price was: ₹20,000.00.₹16,000.00Current price is: ₹16,000.00.
Source : Verilog HDL
Abstract:
Finite-field multiplication has received prominent attention in the literature with applications in cryptography and error-detecting codes. For many cryptographic algorithms, this arithmetic operation is a complex, costly, and time-consuming task that may require millions of gates. In this work, we propose efficient hardware architectures based on cyclic redundancy check (CRC) as error-detection schemes for postquantum cryptography (PQC) with case studies for the Luov cryptographic algorithm. Luov was submitted for the National Institute of Standards and Technology (NIST) PQC standardization competition and was advanced to the second round. The CRC polynomials selected are in-line with the required error-detection capabilities and with the field sizes as well. We have developed verification codes through which software implementations of the proposed schemes are performed to verify the derivations of the formulations. Additionally, hardware implementations of the original multipliers with the proposed error-detection schemes are performed over a Xilinx field-programmable gate array (FPGA), verifying that the proposed schemes achieve high error coverage with acceptable overhead.
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