Bell Labs Technical Journal最新文献_第3页

Study on the Role of Project Manager in Improving the Project Performance 项目经理在提高项目绩效中的作用研究

Bell Labs Technical Journal Pub Date : 2019-07-01 DOI: 10.3126/tj.v1i1.27711

O. Giri

引用次数: 7

Quo Vadis Qubit? 瓦迪斯·库比特在哪里？

Bell Labs Technical Journal Pub Date : 2018-11-07 DOI: 10.15325/BLTJ.2018.2860381

Dimitrios Schinianakis;Enrique Martín-López

引用次数: 0

Will productivity growth return in the new digital era 在新的数字时代，生产率会恢复增长吗?

Bell Labs Technical Journal Pub Date : 2017-06-16 DOI: 10.15325/BLTJ.2017.2714819

Iraj Saniee;Sanjay Kamat;Subra Prakash;Marcus Weldon

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引用次数: 31

Scalable Algorithms for Large and Dynamic Networks: Reducing Big Data for Small Computations 大型和动态网络的可扩展算法:减少小计算的大数据

Bell Labs Technical Journal Pub Date : 2015-06-26 DOI: 10.15325/BLTJ.2015.2437465

I. Saniee

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引用次数: 3

Scalable Algorithms for Large and Dynamic Networks: Reducing Big Data for Small Computations 大型和动态网络的可扩展算法：减少小型计算的大数据

Bell Labs Technical Journal Pub Date : 2015-06-26 DOI: 10.15325/BLTJ.2015.2437465

Iraj Saniee

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引用次数: 3

Massive MIMO: An Introduction 大规模MIMO：简介

Bell Labs Technical Journal Pub Date : 2015-03-20 DOI: 10.15325/BLTJ.2015.2407793

Thomas L. Marzetta

{"title":"Massive MIMO: An Introduction","authors":"Thomas L. Marzetta","doi":"10.15325/BLTJ.2015.2407793","DOIUrl":"https://doi.org/10.15325/BLTJ.2015.2407793","url":null,"abstract":"Demand for wireless throughput, both mobile and fixed, will always increase. One can anticipate that, in five or ten years, millions of augmented reality users in a large city will want to transmit and receive 3D personal high-definition video more or less continuously, say 100 megabits per second per user in each direction. Massive MIMO-also called Large-Scale Antenna Systems-is a promising candidate technology for meeting this demand. Fifty-fold or greater spectral efficiency improvements over fourth generation (4G) technology are frequently mentioned. A multiplicity of physically small, individually controlled antennas performs aggressive multiplexing/demultiplexing for all active users, utilizing directly measured channel characteristics. Unlike today's Point-to-Point MIMO, by leveraging time-division duplexing (TDD), Massive MIMO is scalable to any desired degree with respect to the number of service antennas. Adding more antennas is always beneficial for increased throughput, reduced radiated power, uniformly great service everywhere in the cell, and greater simplicity in signal processing. Massive MIMO is a brand new technology that has yet to be reduced to practice. Notwithstanding, its principles of operation are well understood, and surprisingly simple to elucidate.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"20 ","pages":"11-22"},"PeriodicalIF":0.0,"publicationDate":"2015-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15325/BLTJ.2015.2407793","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50327059","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: 506

Massive MIMO: An Introduction 大规模MIMO:介绍

Bell Labs Technical Journal Pub Date : 2015-03-20 DOI: 10.15325/BLTJ.2015.2407793

T. Marzetta

{"title":"Massive MIMO: An Introduction","authors":"T. Marzetta","doi":"10.15325/BLTJ.2015.2407793","DOIUrl":"https://doi.org/10.15325/BLTJ.2015.2407793","url":null,"abstract":"Demand for wireless throughput, both mobile and fixed, will always increase. One can anticipate that, in five or ten years, millions of augmented reality users in a large city will want to transmit and receive 3D personal high-definition video more or less continuously, say 100 megabits per second per user in each direction. Massive MIMO-also called Large-Scale Antenna Systems-is a promising candidate technology for meeting this demand. Fifty-fold or greater spectral efficiency improvements over fourth generation (4G) technology are frequently mentioned. A multiplicity of physically small, individually controlled antennas performs aggressive multiplexing/demultiplexing for all active users, utilizing directly measured channel characteristics. Unlike today's Point-to-Point MIMO, by leveraging time-division duplexing (TDD), Massive MIMO is scalable to any desired degree with respect to the number of service antennas. Adding more antennas is always beneficial for increased throughput, reduced radiated power, uniformly great service everywhere in the cell, and greater simplicity in signal processing. Massive MIMO is a brand new technology that has yet to be reduced to practice. Notwithstanding, its principles of operation are well understood, and surprisingly simple to elucidate.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"20 1","pages":"11-22"},"PeriodicalIF":0.0,"publicationDate":"2015-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15325/BLTJ.2015.2407793","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67385051","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: 497

The Past, Present, and Future of Copper Access 铜接入的过去、现在和未来

Bell Labs Technical Journal Pub Date : 2015-03-09 DOI: 10.15325/BLTJ.2015.2397851

Jochen Maes;Carl J. Nuzman

{"title":"The Past, Present, and Future of Copper Access","authors":"Jochen Maes;Carl J. Nuzman","doi":"10.15325/BLTJ.2015.2397851","DOIUrl":"https://doi.org/10.15325/BLTJ.2015.2397851","url":null,"abstract":"Digital Subscriber Line technology has democratized broadband access, and over the past several decades, telecommunications providers have evolved from providing plain old telephone service (POTS) over a copper loop plant to providing broadband access and high-definition video over hybrid fiber-copper networks. This article focuses on three revolutionary copper technologies in different stages of development that will enable hybrid networks to continue to increase data rates over orders of magnitude for many years to come. The first of the three, vectoring, is a mature technology with massive ongoing rollout that provides end user speeds above 100 Mb/s across typical distances of 500m. The second, G.fast, is the first ultrabroadband technology offering 1 Gb/s speeds, across typical distances of 100m. It has recently gained approval in the standards bodies and is currently undergoing trials both in research labs and in the field by numerous telecom operators. Finally, we discuss Bell Labs' XG-FAST technology, now in proof of concept, which can deliver 10 Gb/s across a 30 meter copper drop cable. XG-FAST paves the way for a homes-passed fiber network, leveraging high speed copper to the premises to increase its homes-connected.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"20 ","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2015-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15325/BLTJ.2015.2397851","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50416592","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: 26

The Past, Present, and Future of Copper Access 铜矿开采的过去、现在和未来

Bell Labs Technical Journal Pub Date : 2015-03-09 DOI: 10.15325/BLTJ.2015.2397851

J. Maes, C. Nuzman

{"title":"The Past, Present, and Future of Copper Access","authors":"J. Maes, C. Nuzman","doi":"10.15325/BLTJ.2015.2397851","DOIUrl":"https://doi.org/10.15325/BLTJ.2015.2397851","url":null,"abstract":"Digital Subscriber Line technology has democratized broadband access, and over the past several decades, telecommunications providers have evolved from providing plain old telephone service (POTS) over a copper loop plant to providing broadband access and high-definition video over hybrid fiber-copper networks. This article focuses on three revolutionary copper technologies in different stages of development that will enable hybrid networks to continue to increase data rates over orders of magnitude for many years to come. The first of the three, vectoring, is a mature technology with massive ongoing rollout that provides end user speeds above 100 Mb/s across typical distances of 500m. The second, G.fast, is the first ultrabroadband technology offering 1 Gb/s speeds, across typical distances of 100m. It has recently gained approval in the standards bodies and is currently undergoing trials both in research labs and in the field by numerous telecom operators. Finally, we discuss Bell Labs' XG-FAST technology, now in proof of concept, which can deliver 10 Gb/s across a 30 meter copper drop cable. XG-FAST paves the way for a homes-passed fiber network, leveraging high speed copper to the premises to increase its homes-connected.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"55 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2015-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15325/BLTJ.2015.2397851","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67384977","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: 25

A Vision for Thermally Integrated Photonics Systems 热集成光子系统的视觉

Bell Labs Technical Journal Pub Date : 2014-11-20 DOI: 10.15325/BLTJ.2014.2364431

Ryan Enright;Shenghui Lei;Kevin Nolan;Ian Mathews;Alexandre Shen;Guillaume Levaufre;Ronan Frizzell;Guang-Hua Duan;Domhnaill Hernon

{"title":"A Vision for Thermally Integrated Photonics Systems","authors":"Ryan Enright;Shenghui Lei;Kevin Nolan;Ian Mathews;Alexandre Shen;Guillaume Levaufre;Ronan Frizzell;Guang-Hua Duan;Domhnaill Hernon","doi":"10.15325/BLTJ.2014.2364431","DOIUrl":"https://doi.org/10.15325/BLTJ.2014.2364431","url":null,"abstract":"Thermal management has traditionally been relegated to the last step in the design process. However, with the exponential growth in data traffic leading to ever-greater levels of component integration and ever-higher levels of energy consumption, thermal management is rapidly becoming one of the most critical areas of research within the ICT industry. Given the vast use of optics for efficient transmission of high-speed data, this paper focuses on a new thermal solution for cooling the components within pluggable optical modules. Thermally Integrated Photonics Systems (TIPS) represents a new vision for the thermal building blocks required to enable exponential traffic growth in the global telecommunications network. In the TIPS program, existing thermal solutions cannot scale to meet the needs of exponential growth in data traffic. The main barriers to enabling further growth were identified and a research roadmap was developed around a scalable and efficient integrated thermal solution. In particular, the effects of replacing inefficient materials and large macroTECs with better thermal spreaders and μTECs are investidated. In addition, new forms of μChannel cooling into the package to more efficiently remove the heat generated by the lasers and the TECs are being studied which can lead to future photonic devices that can be deployed in a vastly more dense and integrated manner to address the requirements of future telecommunication networks.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"19 ","pages":"31-45"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15325/BLTJ.2014.2364431","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50320562","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: 44