2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)最新文献_第4页

Delay analysis of space division output buffered multichannel switches 空分输出缓冲多通道开关的延迟分析

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC) Pub Date : 2013-12-01 DOI: 10.1109/JEC-ECC.2013.6766396

Fayza A. Nada

引用次数: 0

A simple approach for the recovery of aperture distribution of phased array antennas with single RF channel 一种恢复单射频通道相控阵天线孔径分布的简单方法

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC) Pub Date : 2013-12-01 DOI: 10.1109/JEC-ECC.2013.6766399

T. Sallam, A. Abdel-Rahman, M. Alghoniemy, Z. Kawasaki

引用次数: 3

Fractional K-best sphere decoding algorithm over rayleigh fading MIMO channels 基于瑞利衰落MIMO信道的分数k -最优球解码算法

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC) Pub Date : 2013-12-01 DOI: 10.1109/JEC-ECC.2013.6766395

Ibrahim Al-Nahhal, A. Emran, Hossam M. Kasem, A. A. El-Rahman

{"title":"Fractional K-best sphere decoding algorithm over rayleigh fading MIMO channels","authors":"Ibrahim Al-Nahhal, A. Emran, Hossam M. Kasem, A. A. El-Rahman","doi":"10.1109/JEC-ECC.2013.6766395","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766395","url":null,"abstract":"K-best sphere decoding algorithm (KBA) is used to approach near-maximum-likelihood (ML) performance for multiple-input-multiple-output (MIMO) detection with lower complexity than maximum-likelihood (ML) method. In KBA, the value of survivor paths K, can be fixed values only in all tree levels. These fixed values of K's give a certain performances at a certain complexities. In this paper, a new fractional K-best algorithm (FKBA) is proposed which gives a performance and complexity between these discreet performances and complexities for ordinary KBA, acts as if the values of K's are fractions (not integers). This can be achieved by increasing the number of survivor paths into K+Δ in some tree levels and stays K paths in other tree levels. The value of Δ in a specific tree level is resulted from the number of branches have distance metrics lower than or equal the value of average distance metric for all branches in the same tree level. The simulation results show that the performance and complexity of FKBA are approximately in the middle of performances and complexities of two successive values of K (K and K + 1) for different MIMO models of 16 - QAM over Rayleigh fading MIMO Channels for all values of SNR.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131275797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Hybrid limited-pointer linked-list cache directory and cache coherence protocol 混合有限指针链表缓存目录和缓存一致性协议

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC) Pub Date : 2013-12-01 DOI: 10.1109/JEC-ECC.2013.6766389

M. Mahmoud, A. Wassal

{"title":"Hybrid limited-pointer linked-list cache directory and cache coherence protocol","authors":"M. Mahmoud, A. Wassal","doi":"10.1109/JEC-ECC.2013.6766389","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766389","url":null,"abstract":"The rise of Chip-Multiprocessors (CMPs) as a promising trend for the state of the art high-performance processors design raised the need for a scalable cache directory organization along with a simple cache coherence protocol as a hot research area. While thousands of cores are expected to fit on a single chip soon, the previously proposed cache directory schemes still lacks the scalability to accommodate more than tens of cores. The inefficiencies of these directory schemes come in the form of unaffordable memory overhead, excessive coherence traffic leading to performance degradation due to inexact representation of sharers and very complex coherence protocols. In this paper we introduce a new cache directory scheme for many core CMPs. The proposed scheme acquires, and actually improves, the scalability and low coherence traffic of cache-based linked list directory schemes while avoiding its completely sequential operation by exploiting the parallel operation of limited pointer directory schemes. We compare the proposed organization with these two previously proposed ones on different CMP configurations starting with a 4-core CMP and ending with a 32-core CMP. We show that the proposed scheme can avoid one third of the excessive broadcasted invalidation messages and two thirds of the extraneous acks in case of directory pointer overflows in limited pointer schemes. On the other hand, the proposed scheme achieves around 10% better performance than that of the completely sequential cache-based linked list directory while reducing the number of invalidation messages per invalidation event by 24%.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126877623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Two approaches for the modified asymmetrically clipped optical orthogonal frequency division multiplexing system 改进的非对称裁剪光正交频分复用系统的两种方法

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC) Pub Date : 2013-03-13 DOI: 10.1109/JEC-ECC.2013.6766400

Salma D. Mohamed, Haitham S. Khallaf, Hossam M. H. Shalaby, Ivan Andonovic, Moustafa H. Aly

引用次数: 6

Vision based SLAM for humanoid robots: A survey 基于视觉的类人机器人SLAM研究综述

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC) Pub Date : 1900-01-01 DOI: 10.1109/JEC-ECC.2013.6766407

Walaa Gouda, W. Gomaa, Tetsuji Ogawa

引用次数: 13

Low-power, low-voltage CMOS ultra-wideband low noise amplifier for portable devices 用于便携式设备的低功耗、低电压CMOS超宽带低噪声放大器

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC) Pub Date : 1900-01-01 DOI: 10.1109/JEC-ECC.2013.6766387

K. Yousef, H. Jia, R. Pokharel, A. Allam, M. Ragab, H. Kanaya, K. Yoshida

引用次数: 3