2011 International Conference on Space Optical Systems and Applications (ICSOS)最新文献_第5页

Multi-rate low density generator matrix code for satellite laser communications 卫星激光通信用多速率低密度发生器矩阵码

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783698

H. Matsuo, E. Okamoto, Y. Iwanami, Y. Shoji, M. Toyoshima, Y. Takayama

引用次数: 1

Design and evaluation of an IDMA cooperative relay free-space optical system 一种IDMA协同中继自由空间光学系统的设计与评价

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783697

Jingyuan Fan, Xiaolin Zhou, Jun Liu

引用次数: 11

Deep-space optical communications 深空光通信

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783707

R. Cesarone, D. Abraham, S. Shambayati, J. Rush

{"title":"Deep-space optical communications","authors":"R. Cesarone, D. Abraham, S. Shambayati, J. Rush","doi":"10.1109/ICSOS.2011.5783707","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783707","url":null,"abstract":"Current key initiatives in deep-space optical communications are treated in terms of historical context, contemporary trends, and prospects for the future. An architectural perspective focusing on high-level drivers, systems, and related operations concepts is provided. Detailed subsystem and component topics are not addressed. A brief overview of past ideas and architectural concepts sets the stage for current developments. Current requirements that might drive a transition from radio frequencies to optical communications are examined. These drivers include mission demand for data rates and/or data volumes; spectrum to accommodate such data rates; and desired power, mass, and cost benefits. As is typical, benefits come with associated challenges. For optical communications, these include atmospheric effects, link availability, pointing, and background light. The paper describes how NASA's Space Communication and Navigation Office will respond to the drivers, achieve the benefits, and mitigate the challenges, as documented in its Optical Communications Roadmap. Some nontraditional architectures and operations concepts are advanced in an effort to realize benefits and mitigate challenges as quickly as possible. Radio frequency communications is considered as both a competitor to and a partner with optical communications. The paper concludes with some suggestions for two affordable first steps that can yet evolve into capable architectures that will fulfill the vision inherent in optical communications.","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116692919","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: 170

Design of a ground-based optical receiver for the lunar laser communications demonstration 月球激光通信演示地基光接收机的设计

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783715

M. Grein, A. Kerman, E. Dauler, O. Shatrovoy, R. Molnar, D. Rosenberg, J. Yoon, C. Devoe, D. V. Murphy, B. Robinson, D. Boroson

引用次数: 61

Numerical evaluation of coherent signals for deep-space links 深空链路相干信号的数值计算

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783693

A. Waseda, M. Sasaki, M. Takeoka, M. Fujiwara, M. Toyoshima, A. Assalini

引用次数: 1

Comparison of square and radial geometries for high intensity laser power beaming receivers 高强度激光功率集束接收机的方形和径向几何形状的比较

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783689

D. Raible, Brian Fast, D. Dinca, T. Nayfeh, Andrew Jalics

{"title":"Comparison of square and radial geometries for high intensity laser power beaming receivers","authors":"D. Raible, Brian Fast, D. Dinca, T. Nayfeh, Andrew Jalics","doi":"10.1109/ICSOS.2011.5783689","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783689","url":null,"abstract":"In an effort to further advance a realizable form of wireless power transmission (WPT), high intensity laser power beaming (HILPB) has been developed for both space and terrestrial applications. Unique optical-to-electrical receivers are employed with near infrared (IR-A) continuous-wave (CW) semiconductor lasers to experimentally investigate the HILPB system. In this paper, parasitic feedback, uneven illumination and the implications of receiver array geometries are considered and experimental hardware results for HILPB are presented. The TEM00 Gaussian energy profile of the laser beam presents a challenge to the effectiveness of the receiver to perform efficient photoelectric conversion, due to the resulting non-uniform illumination of the photovoltaic cell arrays. In this investigation, the geometry of the receiver is considered as a technique to tailor the receiver design to accommodate the Gaussian beam profile, and in doing so it is demonstrated that such a methodology is successful in generating bulk receiver output power levels reaching 25 W from 7.2 cm2 of photovoltaic cells. These results are scalable, and may be realized by implementing receiver arraying and utilizing higher power source lasers to achieve a 1.0 m2 receiver capable of generating over 30 kW of electrical power. This type of system would enable long range optical ‘refueling’ of electric platforms, such as MUAV's, airships, robotic exploration missions and provide power to spacecraft platforms which may utilize it to drive electric means of propulsion. In addition, a smaller HILPB receiver aperture size could be utilized to establish a robust optical communications link within environments containing high levels of background radiance, to achieve high signal to noise ratios.","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122610567","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: 3

Deep-space optical terminals 深空光终端

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783719

H. Hemmati, W. Farr, A. Biswas, K. Birnbaum, W. Roberts, K. Quirk, S. Townes

引用次数: 10

Light-wave antenna: Is it a simple extension of optical telescopes? 光波天线:它是光学望远镜的简单延伸吗?

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783705

T. Takano

引用次数: 1

Micro-integrated ECDLs for precision spectroscopy in space 用于空间精密光谱学的微集成ecdl

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783701

E. Luvsandamdin, G. Mura, A. Wicht, A. Sahm, S. Spiessberger, H. Wenzel, G. Erbert, G. Trankle

引用次数: 2

A novel RF signal beamforming scheme over Optical Wireless Communications 一种新的无线光通信射频信号波束形成方案

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783695

Jiang Liu, Wasinee Noonpakdee, H. Takano, S. Shimamoto

{"title":"A novel RF signal beamforming scheme over Optical Wireless Communications","authors":"Jiang Liu, Wasinee Noonpakdee, H. Takano, S. Shimamoto","doi":"10.1109/ICSOS.2011.5783695","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783695","url":null,"abstract":"In this paper, we present a novel relay system in which a radio frequency (RF) signal is relayed over optical media to provide wireless communications in RF sensitive areas. We refer to this as RF over Optical (RFoO). Different from conventional relay systems, we adopt RF band phase shift beamforming to adjust the initial phases of the RF signal before modulating it into the optical band. As a benefit, we are able to control the energy of the transmitted signal to concentrate it in desired areas. To reduce overhead and device loss we designed a simplified beamforming process which is based upon a predefined beam codebook. The relay station sends a series of ‘training sequences’ using each pre-defined beam pattern. Mobile devices estimate the Signal-To-Noise (SNR) ratio of these ‘training sequences’ to determine the optimal beam pattern, then informs the relay station of the optimal pattern. By properly designing the beam codebook, the proposed system is capable of providing wider coverage of a service area with multiple beams, and achieving stronger received power at the mobile terminal than non-beamformed radiation system. Compared to other beam control schemes, the proposed scheme is easy to implement and allows for very quick beam changes. We provide a theoretical analysis followed by computer simulation. Our simulation results show that this system can effectively enhance the received power and improve the BER performance of Optical Wireless Communications.","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132734735","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: 3