检索结果-内蒙古大学图书馆

Parallel low-density parity check decoding on a network-on-chip-based multiprocessor platform

IET COMPUTERS AND DIGITAL TECHNIQUES 2012年第2期6卷 86-94页

作者： Hu, W. -H. Chen, C. -Y. Bahn, J. H. Bagherzadeh, N. Univ Calif Irvine Dept Elect Engn & Comp Sci Irvine CA 92697 USA Qualcomm Inc Qualcomm CDMA Technol San Diego CA 92121 USA

Low-density parity check (LDPC) codes can achieve performances close to the Shannon limit and they have been widely adopted for various communication standards. However, the irregular message exchange pattern of LDPC codes is a major challenge for decoder design. Additionally, there is a great demand for integrating diverse applications onto a single system where a flexible, scalable and efficient implementation of LDPC decoding is highly preferable. With the enormous computing power provided by integrating many processors on a single chip in advanced process technology, a multiprocessor platform is regarded as a promising solution to tackle these design challenges. In this work, we devised a parallelisation scheme to implement LDPC decoding on a multiprocessor platform. By using a distributed and cooperative way for LDPC decoding, the memory bottleneck, commonly seen in LDPC decoder design, is eliminated. Moreover, we used a graph spectra-based mapping algorithm to reduce heavy message exchanges among processors during the decoding process. Compared to the sequential mapping strategy, our approach has successfully decreased the amount of inter-processor communication by up to 48%/45%/40% for 16/32/64-processor platforms, respectively. Cycle-accurate simulation results from various LDPC codes demonstrate that desirable scalability and speedups are obtained by our approach.

关键词： memory bottleneck graph spectra based mapping algorithm parallel low density parity check decoding Network-on-chip Multiprocessing systems graph theory message exchanges network-on-chip parity check codes Shannon limit decoding network-on-chip based multiprocessor platform cycle accurate simulation Combinatorial mathematics decoder design irregular message exchange pattern multiprocessing systems

来源：评论

学校读者我要写书评

暂无评论

TESTABLE design OF LARGE RANDOM-ACCESS MEMORIES

引用

INTEGRATION-THE VLSI JOURNAL 1984年第4期2卷 309-330页

作者： SALUJA, KK LE, KT UNIV NEWCASTLE DEPT ELECT & COMP ENGNNEWCASTLENSW 2308AUSTRALIA

In this paper we propose a method for testable design of large Random Access Memories. The design technique relies on modification of address decoders to achieve multi-writes and multi-reads during test mode. Almost no modification is required in the design of memory array. A number of different designs for decoders are proposed. In all the designs the objective has been to keep the extra hardware for enhancing testability to as small as possible while causing a minimal or no degradation at all in the speed performance of RAM. Use of extra control and observation points is allowed as long as such points cause only a very small increase in the number of extra pins. We also propose the design of decorders in which only a limited number of cells of RAM are written to or read from during test mode.

关键词： Random access memory testable design of RAM fault detection RAM testing decoder design MOS memory built-in testing

来源：评论

学校读者我要写书评

暂无评论

Efficient decoder Architecture for Single Block-Row Quasi-Cyclic LDPC Codes

引用

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS 2014年第10期61卷 793-797页

作者： Zhang, Chuan Wang, Zhongfeng You, Xiaohu Southeast Univ Natl Mobile Commun Res Lab Nanjing 210096 Jiangsu Peoples R China Broadcom Corp Irvine CA 92617 USA

Single block-row quasi-cyclic low-density parity-check codes have been proposed for high-speed applications recently. However, no existing work has systematically addressed the decoder design issue for such kind of codes. In this brief, an efficient decoder architecture for such kinds of codes is proposed by exploring the geometry properties of the check matrix. Compared with conventional approaches, the proposed method can achieve more than 20.8% of memory reduction. Additionally, the subblock-sharing technique and the suboptimal low-latency searching method are employed to further reduce the hardware complexity.

关键词： decoder design low-density parity-check (LDPC) codes matrix decomposition single block-row

来源：评论

学校读者我要写书评

暂无评论

An Efficient CVA-based Decoding Algorithm for Tail-biting Codes

An Efficient CVA-based Decoding Algorithm for Tail-biting Co...

引用

54th Annual IEEE Global Telecommunications Conference (GLOBECOM)

作者： Wang, Xiaotao Qian, Hua Xu, Jing Yang, Yang Wang, Fang Chinese Acad Sci Shanghai Inst Microsyst & Informat Technol Shanghai 200050 Peoples R China

ISBN: (纸本)9781424492688

Tail-biting convolutional codes (TBCC) provide an efficient method to eliminate the rate loss caused by the known-tail encoding. To simplify the decoder design, circular Viterbi algorithm (CVA) has been proposed by recording and repeating the received block of (soft) symbols beyond the block boundary and continuing Viterbi decoding. However, CVA does not converge in the presence of circular trap. A checking rule is proposed for detecting the circular trap in existing CVA. Based on this rule, an efficient CVA-based decoding algorithm is obtained for tail-biting codes, which exhibits near-optimal performance for both short and long tail-biting codes. This new scheme provides faster convergence speed than the conventional CVA without increasing in complexity and storage space.

关键词： Convolutional codes Generators Iterative decoding Maximum likelihood decoding Measurement Viterbi algorithm Viterbi decoding block boundary Viterbi decoding checking rule circular Viterbi algorithm circular trap detection continuing Viterbi decoding convolutional codes decoder design long tail-biting codes near-optimal performance rate loss elimination short tail-biting codes tail encoding tail-biting convolutional codes

来源：评论

学校读者我要写书评

暂无评论

Forward Error Correcting Code for High Data Rate LEO Satellite Optical Downlinks

Forward Error Correcting Code for High Data Rate LEO Satelli...

引用

International Conference on Space Optics (ICSO)

作者： Poulenard, S. Gadat, B. Chouteau, J. F. Anfray, T. Poulliat, C. Jego, C. Hartmann, O. Artaud, G. Meric, H. Airbus Def & Space 31 Rue Cosmonautes F-31402 Toulouse France Univ Bordeaux Bordeaux INP CNRS IMS Lab Bordeaux France Univ Toulouse ENSEEIHT Toulouse France French Spatial Agcy CNES Toulouse France

ISBN: (纸本)9781510630772

A simulation framework based on a physical-layer based abstraction to predict physical layer performances and to compare different forward error correcting (FEC) codes is presented. This framework is used to jointly design interleaving and FEC schemes for free space optical link. A sub-class of regular Low-Density Parity-Check codes is shown to be an interesting alternative to current space communication standard for optical links that require low error floor and high decoder throughput. End-to-end simulations show the feasibility of error free link from a LEO satellite to a high complexity ground station at 25Gbits/s and from a LEO satellite to low complexity optical ground station at 10 Gbits/s. The proposed protection scheme is composed of FG LDPC code and a bit interleaver to span the burst of errors.

关键词： Optical link error correcting code LDPC code decoder design

来源：评论

学校读者我要写书评

暂无评论

The decoder performance comparison in the closed-loop BMI system based on MPC 37

The decoder performance comparison in the closed-loop BMI sy...

引用

37th Chinese Control Conference (CCC)

作者： Pan, Hongguang Mi, Wenyu Sun, Jinggao Ding, Baocang Xian Univ Sci & Technol Coll Elect & Control Engn Xian 710054 Shaanxi Peoples R China East China Univ Sci & Technol Minist Educ Key Lab Adv Control & Optimizat Technol Shanghai 200237 Peoples R China Xi An Jiao Tong Univ Sch Elect & Informat Engn Xian 710049 Shaanxi Peoples R China

ISBN: (纸本)9789881563958

Brain-machine interface (BMI) can be used to translate the neural activities of the brain into the control signals for the artificial arm, aiming to offer the disabled patients greater interaction with the world. In recent years, some emerging technologies, such as back propagation (BP) neural network and recurrent neural networks (RNN) with long-short term memory (LSTM), have been adopted in many fields. Hence, we firstly design four decoders based on the classical Wiener filter and Kalman filter, and the emerging BP neural network and RNN with LSTM, and compare the performance of these decoders offline. Secondly, considering the advantages of the model predictive control (MPC), we design an auxiliary controller based on MPC algorithm to form a closed-loop BMI system, and compare the performance of four decoders online.

关键词： decoder design Model predictive control Performance comparison Online Offline

来源：评论

学校读者我要写书评

暂无评论

Advanced Decoding Methods for Massive-MIMO Systems Employing Deep Learning 4

Advanced Decoding Methods for Massive-MIMO Systems Employing...

引用

4th International Conference on Advances in Electrical, Computing, Communication and Sustainable Technologies, ICAECT 2024

作者： Kumar, Shashank Singh, Mangal Symbiosis Institute of Technology Department of Etc Pune India

ISBN: (纸本)9798350343670

Massive Multiple Input Multiple Output (MIMO) technology has a lot of potential for meeting wireless communication systems' growing need for large data rates. This work presents a novel decoder design that takes advantage of deep learning techniques and is tailored for Massive-MIMO systems. The conventional decoding methods encounter challenges in handling the massive scale of antennas and complex interference scenarios. To address these limitations, we propose an innovative decoder architecture that integrates deep learning models for enhanced signal processing and decoding accuracy. By employing neural network-based decoding strategies, our proposed system demonstrates significant improvements in decoding performance, achieving remarkable gains in spectral efficiency and error correction capabilities. Extensive simulations and comparative analyses validate the efficacy of the proposed deep learning-driven decoder, showcasing its adaptability and superior performance in real-world Massive-MIMO environments. © 2024 IEEE.

关键词： decoder design Deep learning Interference mitigation Massive MIMO Neural networks Signal processing Spectral efficiency Wireless communication

来源：评论

学校读者我要写书评

暂无评论

Amd :: Datasheets :: Amd Palce16V8H 1989

引用

2016年

[Auto Generated] PALCE16V8 Data Sheet ....................................................................................... iii PALASM 2 Software Support for the PALCE16V8 ............................................ a-1 design a decoder for the PALCE16V8 ................................................................. 1 About this Tutorial ................................................................................................. 2 Install the Software .................................

关键词： advanced micro clock check clockf clock datasheets declaration segment decoder decoder design design design file device file input output output files pal device palasm palasm software palce16v8h pin simulation simulation segment software

来源：评论

学校读者我要写书评

暂无评论

Efficient decoder Reduction for a Variety of Encoder-decoder Problems

引用

IEEE ACCESS 2020年 8卷 169444-169455页

作者： van der Putten, Joost van der Sommen, Fons De With, Peter H. N. Eindhoven Univ Technol NL-5612 Eindhoven Netherlands Eindhoven Univ Technol Dept Elect Engn Video Coding & Architectures Res Grp NL-5612 Eindhoven Netherlands Eindhoven Univ Technol Ctr Care & Cure Technol NL-5612 Eindhoven Netherlands

Encoder-decoder networks have become the standard solution for a variety of segmentation tasks. Many of these approaches use a symmetrical design where both the encoder as well as the decoder are approximately of the same computational complexity. However, symmetrical properties of encoder-decoder networks are not necessarily optimal. This work proposes an elegant and generic method to reduce the decoder complexity in encoder-decoder networks by scaling the number of feature channels in the decoder. The popular network U-Net is used as an example for how to adapt existing models with symmetrical properties. The effect of the decoder size is investigated on three data sets with varying complexity, namely, the ISIC, Cityscapes, and SUN RDB-D data sets. We show that a reduction in decoder channels shows no statistically differing results while at the same time providing a decoder requiring up to 99% fewer FLOPs, (+/- 90% fewer FLOPs is attainable for all investigated problems). In addition, results show that the number of parameters in the decoder of two models which already have smaller decoders can be further optimised depending on the problem. The proposed solution is a simple method and can easily be implemented in other encoder-decoder models. Empirical results also show that a reduction in parameters may even lead to improved performance, which is likely due to fewer parameters, reducing overfitting effects.

关键词： Decoding Complexity theory Adaptation models Convolution Standards Task analysis Image segmentation Convolutional neural networks decoder design model optimization deep learning

来源：评论

学校读者我要写书评

暂无评论

The decoder performance comparison in the closed-loop BMI system based on MPC

The decoder performance comparison in the closed-loop BMI sy...

引用

第37届中国控制会议

作者： Hongguang Pan Wenyu Mi Jinggao Sun Baocang Ding College of Electric and Control Engineering Xi'an University of Science and Technology Key Laboratory of Advanced Control and Optimization Technology of Ministry of Education East China University of Science and Technology School of Electronic and Information Engineering Xi'an Jiaotong University

Brain-machine interface(BMI) can be used to translate the neural activities of the brain into the control signals for the artificial arm, aiming to offer the disabled patients greater interaction with the world. In recent years, some emerging technologies, such as back propagation(BP) neural network and recurrent neural networks(RNN) with long-short term memory(LSTM), have been adopted in many fields. Hence, we firstly design four decoders based on the classical Wiener filter and Kalman filter, and the emerging BP neural network and RNN with LSTM, and compare the performance of these decoders offline. Secondly, considering the advantages of the model predictive control(MPC), we design an auxiliary controller based on MPC algorithm to form a closed-loop BMI system, and compare the performance of four decoders online.

关键词： decoder design Model predictive control Performance comparison Online Offline

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：