scholarly journals On digital phase detector

2021 ◽  
Vol 2094 (2) ◽  
pp. 022049
Author(s):  
O V Chernoyarov ◽  
A N Glushkov ◽  
A A Golikov ◽  
V P Litvinenko ◽  
V A Mironov
Keyword(s):  
Block Diagram ◽  
Reference Signal ◽  
Digital Processing ◽  
Phase Detector ◽  
Gate Arrays ◽  
Digital Phase ◽  
Digital Detector ◽  
Wide Range ◽  
Field Programmable ◽  
Programmable Gate Arrays

Abstract A digital phase detector for processing signals with phase modulation in a wide range of changes in the phase of the received signal is considered. A block diagram of a digital detector with minimal computational costs for the signal period is proposed. The problem of phase jumps when it changes by more than 2π is solved. An estimate is obtained for the noise immunity of a phase detector when exposed to Gaussian noise. Supposed hardware implementation of a phase detector based on field-programmable gate arrays. It can be used in devices for digital processing of the angular modulation signals, devices for controlling the phase of the reference signal and in different measurers.

Comparison of Interpolators Used for Time-Interval Measurement Systems Based on Multiple-Tapped Delay Line

2017 ◽  
Vol 24 (2) ◽  
pp. 401-412 ◽  
Author(s):  
Dariusz Chaberski ◽  
Robert Frankowski ◽  
Maciej Gurski ◽  
Marek Zieliński
Keyword(s):  
Measurement Range ◽  
Time Interval ◽  
Test Results ◽  
Measurement Systems ◽  
Gate Arrays ◽  
Wide Range ◽  
Time Stamps ◽  
Field Programmable ◽  
Programmable Gate Arrays ◽  
Construction Operation

AbstractThe paper describes the construction, operation and test results of three most popular interpolators from a viewpoint of time-interval (TI) measurement systems consisting of many tapped-delay lines (TDLs) and registering pulses of a wide-range changeable intensity. The comparison criteria include the maximum intensity of registered time stamps (TSs), the dependency of interpolator characteristic on the registered TSs’ intensity, the need of using either two counters or a mutually-complementing pair counter-register for extending a measurement range, the need of calculating offsets between TDL inputs and the dependency of a resolution increase on the number of used TDL segments. This work also contains conclusions about a range of applications, usefulness and methods of employing each described TI interpolator. The presented experimental results bring new facts that can be used by the designers who implement precise time delays in the field-programmable gate arrays (FPGA).

scholarly journals Modeling and simulation of FPGA-based redundant digital systems

2020 ◽  
Vol 11 (1) ◽  
pp. 73-79
Author(s):  
Csaba Szász
Keyword(s):  
Operation Mode ◽  
Majority Voting ◽  
Digital Systems ◽  
Gate Arrays ◽  
Reliability Level ◽  
Initial Assumption ◽  
Wide Range ◽  
Field Programmable ◽  
Programmable Gate Arrays ◽  
Modular Redundancy

AbstractReliability is one of the most important criteria that characterize last generation digital systems. In a wide range of applications the required reliability level is achieved by using hardware redundant configurations. Perhaps their most common form is the triple modular redundancy (TMR) based on a majority voting structure. Researchers that use this strategy make a major assumption: in fault-free operation mode the outputs of these digital systems match in all. This paper proves that synchronization and matching in all the outputs of such systems is not such a trivial problem. In this endeavor FPGA-based (Field Programmable Gate Arrays) redundant topologies are considered for study and experiments. Upon these structures specially conceived redundant models have been developed and simulated. The results outline that synchronization of complex digital systems is a difficult engineering undertaking and any initial assumption should be managed with the adequate circumspection.

scholarly journals Runtime Scheduling, Allocation, and Execution of Real-Time Hardware Tasks onto Xilinx FPGAs Subject to Fault Occurrence

2013 ◽  
Vol 2013 ◽  
pp. 1-32 ◽  
Author(s):  
Xabier Iturbe ◽  
Khaled Benkrid ◽  
Chuan Hong ◽  
Ali Ebrahim ◽  
Tughrul Arslan ◽  
...  
Keyword(s):  
Field Programmable Gate Arrays ◽  
Proof Of Concept ◽  
Permanent Damage ◽  
Gate Arrays ◽  
Wide Range ◽  
Field Programmable ◽  
Programmable Gate Arrays ◽  
Novel Algorithms ◽  
Technological Constraints ◽  
Reliability Computation

This paper describes a novel way to exploit the computation capabilities delivered by modern Field-Programmable Gate Arrays (FPGAs), not only towards a higher performance, but also towards an improved reliability. Computation-specific pieces of circuitry are dynamically scheduled and allocated to different resources on the chip based on a set of novel algorithms which are described in detail in this article. These algorithms consider most of the technological constraints existing in modern partially reconfigurable FPGAs as well as spontaneously occurring faults and emerging permanent damage in the silicon substrate of the chip. In addition, the algorithms target other important aspects such as communications and synchronization among the different computations that are carried out, either concurrently or at different times. The effectiveness of the proposed algorithms is tested by means of a wide range of synthetic simulations, and, notably, a proof-of-concept implementation of them using real FPGA hardware is outlined.

scholarly journals FPGA-Based Controller for a Hybrid Grid-Connected PV/Wind/Battery Power System with AC Load

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2108
Author(s):  
Mohamed Yassine Allani ◽  
Jamel Riahi ◽  
Silvano Vergura ◽  
Abdelkader Mami
Keyword(s):  
Fuzzy Logic ◽  
Hybrid System ◽  
High Voltage ◽  
Field Programmable Gate Arrays ◽  
Energy System ◽  
Maximum Power ◽  
Hybrid Energy ◽  
Gate Arrays ◽  
Field Programmable ◽  
Programmable Gate Arrays

The development and optimization of a hybrid system composed of photovoltaic panels, wind turbines, converters, and batteries connected to the grid, is first presented. To generate the maximum power, two maximum power point tracker controllers based on fuzzy logic are required and a battery controller is used for the regulation of the DC voltage. When the power source varies, a high-voltage supply is incorporated (high gain DC-DC converter controlled by fuzzy logic) to boost the 24 V provided by the DC bus to the inverter voltage of about 400 V and to reduce energy losses to maximize the system performance. The inverter and the LCL filter allow for the integration of this hybrid system with AC loads and the grid. Moreover, a hardware solution for the field programmable gate arrays-based implementation of the controllers is proposed. The combination of these controllers was synthesized using the Integrated Synthesis Environment Design Suite software (Version: 14.7, City: Tunis, Country: Tunisia) and was successfully implemented on Field Programmable Gate Arrays Spartan 3E. The innovative design provides a suitable architecture based on power converters and control strategies that are dedicated to the proposed hybrid system to ensure system reliability. This implementation can provide a high level of flexibility that can facilitate the upgrade of a control system by simply updating or modifying the proposed algorithm running on the field programmable gate arrays board. The simulation results, using Matlab/Simulink (Version: 2016b, City: Tunis, Country: Tunisia, verify the efficiency of the proposed solution when the environmental conditions change. This study focused on the development and optimization of an electrical system control strategy to manage the produced energy and to coordinate the performance of the hybrid energy system. The paper proposes a combined photovoltaic and wind energy system, supported by a battery acting as an energy storage system. In addition, a bi-directional converter charges/discharges the battery, while a high-voltage gain converter connects them to the DC bus. The use of a battery is useful to compensate for the mismatch between the power demanded by the load and the power generated by the hybrid energy systems. The proposed field programmable gate arrays (FPGA)-based controllers ensure a fast time response by making control executable in real time.

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