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2012 International Workshop on Optical Wireless Communications (IWOW)最新文献

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Analysis of fog and smoke attenuation in a free space optical communication link under controlled laboratory conditions 受控实验室条件下自由空间光通信链路雾烟衰减分析
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349680
M. Ijaz, Zabih Ghassemlooy, H. Le Minh, S. Rajbhandari, J. Perez
{"title":"Analysis of fog and smoke attenuation in a free space optical communication link under controlled laboratory conditions","authors":"M. Ijaz, Zabih Ghassemlooy, H. Le Minh, S. Rajbhandari, J. Perez","doi":"10.1109/IWOW.2012.6349680","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349680","url":null,"abstract":"In this paper, the attenuation of free space optical (FSO) communication systems operating at selected wavelengths of 0.83 μm, 1.31 μm and 1.55 μm in the controlled laboratory based fog and smoke environments are compared. The fog and smoke are generated and controlled homogeneously along the indoor atmospheric chamber of length 6 m. The experimental results from the selected wavelengths are compared for the continuous spectrum range (0.6 μm <; λ <; 1.55 μm) attenuation. The results show that, unlike the fog attenuation, the resultant smoke attenuation linearly decreases from the visible towards the near infrared (NIR) range from dense to light smoke conditions.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133335097","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
Noise analysis and equalization of a multi-photodiode optical wireless receiver 多光电二极管无线接收机的噪声分析与均衡
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349688
A. Geda, A. Czylwik
{"title":"Noise analysis and equalization of a multi-photodiode optical wireless receiver","authors":"A. Geda, A. Czylwik","doi":"10.1109/IWOW.2012.6349688","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349688","url":null,"abstract":"A technique is presented which improves the performance of an optical receiver for optical wireless communication with a moderate additional complexity. The well-known high-impedance front-end design of an optical receiver is extended by combining multiple PIN photodiode-FET circuits with optimized equalizers in order to achieve a better SNR at the output of the receiver. The receiver is optimum in a sense that it reduces the effective equivalent input referred noise current spectral density by a factor propertional to the number of PIN-FET combinations.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115505473","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: 1
Measurement statistics of three joint wireless optical links 三个联合无线光链路的测量统计
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349682
J. Libich, S. Zvánovec
{"title":"Measurement statistics of three joint wireless optical links","authors":"J. Libich, S. Zvánovec","doi":"10.1109/IWOW.2012.6349682","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349682","url":null,"abstract":"Optical beams are highly affected by an atmosphere. Time and spatially variable distribution of the refractive index as well as different weather conditions result in fluctuation and attenuation of the optical beam. In order to improve signal reception, several mitigation techniques were developed for instance spatial diversity, auto-tracking, adaptive optics etc. This paper discusses utilization of route diversity in FSO networks primarily to increase the availability of the link based on three links diversity measurements.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115785097","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
Site diversity: A promising technique to counteract cloud attenuation on Earth-space optical links 站点多样性:一种很有前途的技术，可以抵消地球-空间光链路上的云衰减
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349679
C. Capsoni, L. Luini, R. Nebuloni
{"title":"Site diversity: A promising technique to counteract cloud attenuation on Earth-space optical links","authors":"C. Capsoni, L. Luini, R. Nebuloni","doi":"10.1109/IWOW.2012.6349679","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349679","url":null,"abstract":"Free Space Optical (FSO) links enable high-speed data transfer from Earth Observation satellites or deep space (DS) probes directly to ground stations. The presence on-board of remote sensing instruments with ever increasing accuracy and resolution fuels the need for transmitting huge amounts of data. This contribution investigates the impairments to optical beam propagation due to clouds by exploiting concurrent radiosonde observation (RAOBS) data collected in three European sites. Long-term yearly statistics of path attenuation are calculated by first discriminating between different cloud types and, afterwards, by integrating their contribution to the total attenuation along each vertical profile of RAOBS data. Finally, the effectiveness of dual-site diversity schemes is evaluated: results confirm that this approach is necessary to achieve an acceptable system availability.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125771627","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
Rateless codes performance tests on terrestrial FSO time-correlated channel model 地面FSO时间相关信道模型下的无速率码性能测试
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349690
A. Andò, S. Mangione, L. Curcio, S. Stivala, G. Garbo, A. Busacca, G. Beleffi, F. Marzano
{"title":"Rateless codes performance tests on terrestrial FSO time-correlated channel model","authors":"A. Andò, S. Mangione, L. Curcio, S. Stivala, G. Garbo, A. Busacca, G. Beleffi, F. Marzano","doi":"10.1109/IWOW.2012.6349690","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349690","url":null,"abstract":"Free Space Optics (FSO) links are affected by several impairments: optical turbulence, scattering, absorption, and pointing. In particular, atmospheric optical turbulence generates optical power fluctuations at the receiver that can degrade communications with fading events, especially, in high data rate links. A way to mitigate FSO link outages can be to add a coding to communications. Nevertheless, in order to study innovative solutions (software or hardware) and to improve the FSO link performance it needs accurate testing models. In this paper we describe an accurate time-correlated channel model able to predict random temporal fluctuations of optical signal irradiance caused by optical turbulence. Moreover, concerning the same channel, we also report simulation results on the error mitigation performance of Luby-Transform, Raptor, and RaptorQ codes.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125249230","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: 4
Investigation of suitable modulation techniques for underwater wireless optical communication 水下无线光通信调制技术的研究
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349691
C. Gabriel, M. Khalighi, S. Bourennane, P. Léon, V. Rigaud
{"title":"Investigation of suitable modulation techniques for underwater wireless optical communication","authors":"C. Gabriel, M. Khalighi, S. Bourennane, P. Léon, V. Rigaud","doi":"10.1109/IWOW.2012.6349691","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349691","url":null,"abstract":"For an underwater wireless optical communication system, we consider the use of different intensity modulation techniques, and compare their performance by taking realistic system parameters into account. In particular, we contrast the performances of on-off keying, pulse position modulation, pulse width modulation, and digital pulse interval modulation, when a PIN or an avalanche photodiode is used at the receiver. We discuss the suitability of these modulation techniques to the underwater optical channel by considering the implementation issues.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128532230","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: 35
LAT indoor MIMO-VLC — Localize, access and transmit LAT室内MIMO-VLC -定位，接入和传输
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349698
M. Biagi, A. Vegni, T. Little
{"title":"LAT indoor MIMO-VLC — Localize, access and transmit","authors":"M. Biagi, A. Vegni, T. Little","doi":"10.1109/IWOW.2012.6349698","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349698","url":null,"abstract":"Visible Light Communications (VLC) is an innovative technology that uses the visible spectrum for high-speed data communications. In this paper we investigate the use of MIMO in the design of luminaires supporting VLC and, specifically, in enabling localization and high data rate services. Localization and transmission appear as two different problems in the communication system; however, the former is helpful to understand which is the diversity degree that the system can adopt, in order to achieve the required performance in terms of BER and data rate. Finally, we consider also how different users can access the Internet by means of a TDMA-like access scheme.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133263119","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: 39
Visible light communication using OLEDs: Illumination and channel modeling 使用oled的可见光通信:照明和通道建模
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349685
H. Chun, Chien-Jung Chiang, D. O’brien
{"title":"Visible light communication using OLEDs: Illumination and channel modeling","authors":"H. Chun, Chien-Jung Chiang, D. O’brien","doi":"10.1109/IWOW.2012.6349685","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349685","url":null,"abstract":"Organic light emitting diodes (OLEDs) are an attractive proposition for replacing large area Lambertian sources in lighting systems. In this paper we investigate both illumination and communication properties of OLED based lighting configurations in a typical room. Two lighting designs are introduced and compared by deterministic and Monte-Carlo simulations. These show that there is considerable potential to optimize both the illumination levels (and hence the received signal to noise ratio for communications) and that sufficient bandwidth is available (when considering that of the OLED) for communications.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121391296","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: 33
Metameric modulation for diffuse visible light communications with constant ambient lighting 具有恒定环境光照的漫射可见光通信的同调调制
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349697
P. Butala, J. Chau, T. Little
{"title":"Metameric modulation for diffuse visible light communications with constant ambient lighting","authors":"P. Butala, J. Chau, T. Little","doi":"10.1109/IWOW.2012.6349697","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349697","url":null,"abstract":"Advances in solid-state lighting are renewing interest in the adoption of the visible spectrum for optical wireless communications. Under the luminaire-as-transmitter model, wireless communication is achieved by modulating LED(s) that must simultaneously meet the illumination mission. Illumination requirements include maintaining energy efficiency, constant color and intensity control whereas communications requirements are speed and BER goals. In this paper we explore the perceptual qualities of visible light from LED luminaires to render color. We then propose a novel modulation scheme for visible light communications which can maintain constant perceived ambient lighting. By using D>;3 LEDs, multiple lighting states that are indistinguishable to humans but are distinguishable to an electronic receiver can be achieved. Changes between these states are detected as intensity modulation in different wavelength bands.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121513223","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
A study of LED lumination uniformity with mobility for visible light communications 可见光通信中具有迁移率的LED发光均匀性研究
2012 International Workshop on Optical Wireless Communications (IWOW) Pub Date : 2012-11-12 DOI: 10.1109/IWOW.2012.6349686
A. Burton, H. Le Minh, Z. Ghasemlooy, S. Rajbhandari
{"title":"A study of LED lumination uniformity with mobility for visible light communications","authors":"A. Burton, H. Le Minh, Z. Ghasemlooy, S. Rajbhandari","doi":"10.1109/IWOW.2012.6349686","DOIUrl":"https://doi.org/10.1109/IWOW.2012.6349686","url":null,"abstract":"This paper investigates the requirements for uniform illumination using white LEDs, showing the balance between lighting and visible light communications. The communications system performance of the is also investigated for mobility with a varying field of view at the receiver, showing that there is a limit that beyond which there are no longer gains to be made in mobility.","PeriodicalId":244805,"journal":{"name":"2012 International Workshop on Optical Wireless Communications (IWOW)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122250492","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: 23
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