scholarly journals Extending C++ for Heterogeneous Quantum-Classical Computing

2021 ◽  
Vol 2 (2) ◽  
pp. 1-36
Author(s):  
Alexander Mccaskey ◽  
Thien Nguyen ◽  
Anthony Santana ◽  
Daniel Claudino ◽  
Tyler Kharazi ◽  
...  
Keyword(s):  
Forward Error Correction ◽  
Quantum Algorithm ◽  
System Level ◽  
Circuit Optimization ◽  
Language Extension ◽  
Quantum Programming ◽  
Near Term ◽  
Classical Computing ◽  
High Level ◽  
Forward Error

We present qcor—a language extension to C++ and compiler implementation that enables heterogeneous quantum-classical programming, compilation, and execution in a single-source context. Our work provides a first-of-its-kind C++ compiler enabling high-level quantum kernel (function) expression in a quantum-language agnostic manner, as well as a hardware-agnostic, retargetable compiler workflow targeting a number of physical and virtual quantum computing backends. qcor leverages novel Clang plugin interfaces and builds upon the XACC system-level quantum programming framework to provide a state-of-the-art integration mechanism for quantum-classical compilation that leverages the best from the community at-large. qcor translates quantum kernels ultimately to the XACC intermediate representation, and provides user-extensible hooks for quantum compilation routines like circuit optimization, analysis, and placement. This work details the overall architecture and compiler workflow for qcor, and provides a number of illuminating programming examples demonstrating its utility for near-term variational tasks, quantum algorithm expression, and feed-forward error correction schemes.

scholarly journals Implementation of an LDPC decoder for IEEE 802.11n using VivadoTM High-Level Synthesis

2021 ◽  
Vol 8 ◽  
pp. 1-4
Author(s):  
Ernest Scheiber ◽  
Guido H. Bruck ◽  
Peter Jung
Keyword(s):  
Forward Error Correction ◽  
Implementation Process ◽  
Research Topic ◽  
High Level Synthesis ◽  
Ldpc Decoder ◽  
The Past ◽  
High Level ◽  
Forward Error ◽  
Hardware Designs ◽  
High Processing

The increasing complexity of hardware designs calls for design methodolgies that use more abstract design entries and increased automation of the implementation process. Highlevel synthesis (HLS) has been a research topic for the past 20 years, and current tools, such as Xilinx VivadoTM HLS promise to bring HLS to widespread use. In this paper we use Xilinx VivadoTMHLS to design an LDPC decoder for 802.11n. Forward error correction decoders are typically implemented in hardware due to the high processing requirements and therefore an LDPC decoder is an appropriate example to demonstrate the power of high-level synthesis

scholarly journals Superdense Coding Interleaved with Forward Error Correction

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Ronald J. Sadlier ◽  
Travis S. Humble
Keyword(s):  
Error Correction ◽  
Quantum Channel ◽  
Forward Error Correction ◽  
Numerical Study ◽  
Communication Security ◽  
Channel Noise ◽  
Unique Role ◽  
Superdense Coding ◽  
Near Term ◽  
Forward Error

AbstractSuperdense coding promises increased classical capacity and communication security but this advantage may be undermined by noise in the quantum channel. We present a numerical study of how forward error correction (FEC) applied to the encoded classical message can be used to mitigate against quantum channel noise. By studying the bit error rate under different FEC codes, we identify the unique role that burst errors play in superdense coding, and we show how these can be mitigated against by interleaving the FEC codewords prior to transmission. We conclude that classical FEC with interleaving is a useful method to improve the performance in near-term demonstrations of superdense coding.

Boolean satisfiability in quantum compilation

2019 ◽  
Vol 378 (2164) ◽  
pp. 20190161 ◽  
Author(s):  
Mathias Soeken ◽  
Giulia Meuli ◽  
Bruno Schmitt ◽  
Fereshte Mozafari ◽  
Heinz Riener ◽  
...  
Keyword(s):  
Programming Language ◽  
Quantum Computer ◽  
Quantum Algorithm ◽  
Boolean Satisfiability ◽  
Good Match ◽  
Theme Issue ◽  
Autonomous Computing ◽  
Multi Stage ◽  
Quantum Programming ◽  
High Level

Quantum compilation is the task of translating a quantum algorithm implemented in a high-level quantum programming language into a technology-dependent instructions flow for a physical quantum computer. To tackle the large gap between the quantum program and the low-level instructions, quantum compilation is split into a multi-stage flow consisting of several layers of abstraction. Several different individual tasks have been proposed for the layers in the flow, many of them are NP-hard. In this article, we will describe the flow and we will propose algorithms based on Boolean satisfiability, which is a good match to tackle such computationally complex problems. This article is part of the theme issue ‘Harmonizing energy-autonomous computing and intelligence’.

scholarly journals A VLSI Design for the LTE Turbo Decoder

2012 ◽  
Vol 7 (1) ◽  
pp. 16-22
Author(s):  
Ilan Schnitman Souza ◽  
V. T. Dos Reis
Keyword(s):  
Turbo Codes ◽  
High Performance ◽  
Forward Error Correction ◽  
Vlsi Design ◽  
Turbo Decoder ◽  
Wireless Telecommunications ◽  
And Performance ◽  
Window Approach ◽  
High Level ◽  
Forward Error

Due to the need of high performance, new wireless telecommunications standards such asWIMAX and LTE are using turbo-codes as a forward error correction (FEC) choice.This design targets either a self-contained IP (Intellectual Property) or integration into the physical layer project. This work presents all steps for the implementation of an LTE standard turbo decoder: from algorithm modeling in high level programming language to architecture using a sliding window approach seeking throughput needed, getting into physical implementation at TSMC 65nm. Each aspect of the specification and performance were analyzed in their proper stages.

1.2 Tbit/s (30 × 42.7 Gbit/s ETDM channel) WDM transmission over 3 × 125 km with forward error correction

2000 ◽  
Vol 36 (9) ◽  
pp. 812 ◽  
Author(s):  
Y. Miyamoto ◽  
K. Yonenaga ◽  
S. Kuwahara ◽  
M. Tomizawa ◽  
A. Hirano ◽  
...  
Keyword(s):  
Error Correction ◽  
Forward Error Correction ◽  
Forward Error ◽  
Wdm Transmission

scholarly journals Aircraft Requirements for Sustainable Regional Aviation

Aerospace ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 61
Author(s):  
Dominik Eisenhut ◽  
Nicolas Moebs ◽  
Evert Windels ◽  
Dominique Bergmann ◽  
Ingmar Geiß ◽  
...  
Keyword(s):  
Systems Engineering ◽  
System Level ◽  
Policy Initiative ◽  
The European Union ◽  
Calculation Methods ◽  
Figures Of Merit ◽  
Performance Requirements ◽  
High Level ◽  
Different Levels ◽  
The Eu

Recently, the new Green Deal policy initiative was presented by the European Union. The EU aims to achieve a sustainable future and be the first climate-neutral continent by 2050. It targets all of the continent’s industries, meaning aviation must contribute to these changes as well. By employing a systems engineering approach, this high-level task can be split into different levels to get from the vision to the relevant system or product itself. Part of this iterative process involves the aircraft requirements, which make the goals more achievable on the system level and allow validation of whether the designed systems fulfill these requirements. Within this work, the top-level aircraft requirements (TLARs) for a hybrid-electric regional aircraft for up to 50 passengers are presented. Apart from performance requirements, other requirements, like environmental ones, are also included. To check whether these requirements are fulfilled, different reference missions were defined which challenge various extremes within the requirements. Furthermore, figures of merit are established, providing a way of validating and comparing different aircraft designs. The modular structure of these aircraft designs ensures the possibility of evaluating different architectures and adapting these figures if necessary. Moreover, different criteria can be accounted for, or their calculation methods or weighting can be changed.

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