2007 41st Annual Conference on Information Sciences and Systems最新文献_第7页

ALOHA for Wireless Sensor Networks with Random Frequency Offsets 随机频率偏移无线传感器网络的ALOHA

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298414

K. N. Modi, S. Ponnaluri, S. G. Wilson, M. Brandt-Pearce

引用次数: 2

Erasure Codes with Small Overhead Factor and Their Distributed Storage Applications 小开销因数的擦除码及其分布式存储应用

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298277

Hiroaki Kameyama, Yuichi Sato

{"title":"Erasure Codes with Small Overhead Factor and Their Distributed Storage Applications","authors":"Hiroaki Kameyama, Yuichi Sato","doi":"10.1109/CISS.2007.4298277","DOIUrl":"https://doi.org/10.1109/CISS.2007.4298277","url":null,"abstract":"In this paper, we consider a family of XOR-based erasure codes with finite-sized randomly-generated parity check matrices, and report the results of thorough computational search for suitable erasure codes for distributed storage applications. Although the discovered matrices are not \"low density\" and the resulting codes are only approximately maximum distance separable (MDS) codes, they have performance advantages over other codes, such as LDPC and IRA (irregular repeat-accumulate) codes, in terms of the overhead factor, that is, the average ratio of the total amount of encoded file blocks for restoring lost blocks to the amount of original file blocks. We designed our codes so that the overhead factor becomes small. While typical LDPC codes use matrices that have several thousand rows, our codes use matrices that have only one thousand rows in consideration of practicable operation time and overhead. Because a method for discovering the most suitable matrix from a large number of matrices has not been found, we executed Monte Carlo simulation for a long time in order to discover a suitable matrix with the lowest overhead factor. We have discovered a family of erasure codes with an overhead factor of 1.002 on average, compared to 1.07 for typical LDPC codes when the number of rows is 1000.","PeriodicalId":151241,"journal":{"name":"2007 41st Annual Conference on Information Sciences and Systems","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123700277","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: 13

Performance Evaluation of Voice Call over an IP based Network 基于IP网络的语音通话性能评估

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298335

N. Sulaiman, R. Carrasco, E. G. Chester

引用次数: 4

A New Full Rate Full Diversity Orthogonal Space-Time Block Code for Three Transmit Antennas 一种新的三发射天线全速率全分集正交空时分组码

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298428

Ning Yang, M. Salehi

引用次数: 4

Optimal Hybrid RF-Wireless Optical Communication for Maximum Efficiency and Reliability 最佳混合射频-无线光通信的效率和可靠性

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298393

Sarma Vangala, H. Pishro-Nik

{"title":"Optimal Hybrid RF-Wireless Optical Communication for Maximum Efficiency and Reliability","authors":"Sarma Vangala, H. Pishro-Nik","doi":"10.1109/CISS.2007.4298393","DOIUrl":"https://doi.org/10.1109/CISS.2007.4298393","url":null,"abstract":"Free space optical (FSO) communication systems provide tremendous potential for low-cost time-constrained high-bandwidth connectivity in a variety of network scenarios. However, these communication systems are highly unreliable due to the variations in the atmospheric channel thus making carrier grade reliabilities very difficult. Previous solutions suggest the use of a backup RF channel in conjunction with the FSO channel. The transmitted message is also duplicated on the RF channel allowing data recovery during the failure of the optical wireless channel. However, this leads to a wastage of the bandwidth of the RF channel and may sometimes also lead to channel \"flapping\". In this paper, we propose a novel coding mechanism that optimally achieves the capacity of the combined FSO and RF channels and still provides carrier grade (99.999%) reliabilities in the FSO link. The proposed mechanism uses nonuniform and rate-compatible LDPC codes to achieve the desired reliability and capacity limits. By avoiding data duplication, we preserve to a great extent the crucial security benefit of the FSO communication. Using simulations, we provide initial results on the performance of these codes to support our claims. In particular, we show that, more than two orders of magnitude improvements in the bit error rates and many-fold decrease in the outage probabilities are possible when using hybrid channel codes.","PeriodicalId":151241,"journal":{"name":"2007 41st Annual Conference on Information Sciences and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122810358","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: 29

Multi-Input Multi-Output Free Space Optical Satellite Communication Links 多输入多输出自由空间光学卫星通信链路

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298392

V. Weerackody, A. R. Hammons, D. Tebben

引用次数: 9

Video Sensor Node for Low-Power Ad-hoc Wireless Networks 低功耗自组织无线网络视频传感器节点

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298307

Y. Chi, R. Etienne-Cummings, G. Cauwenberghs, Paul Carpenter, K. Colling

引用次数: 5

On Blind Adaptive Decision Feedback Equalization for Block QAM Signals 分组QAM信号的盲自适应决策反馈均衡

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298423

A. Cole-Rhodes, A. Beasley

引用次数: 3

Coping with Noise in E. coli Chemotaxis 大肠杆菌趋化性中噪声的处理

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298345

B. Andrews, P. Iglesias, T. Yi

引用次数: 0

Spectral-Efficient Grassmann Codes for Non-Coherent MIMO Systems 非相干MIMO系统的频谱高效格拉斯曼码

2007 41st Annual Conference on Information Sciences and Systems Pub Date : 2007-03-14 DOI: 10.1109/CISS.2007.4298431

Z. Utkovski, J. Lindner

引用次数: 1