2007 International Workshop on Satellite and Space Communications最新文献

Transmission protocols for challenging networks: LTP and LTP-T 具有挑战性的网络传输协议:LTP和LTP- t

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409406

F. Muhammad, L. Franck, S. Farrell

引用次数: 10

Non-Linear Interference Mitigation for Broadband Multimedia Satellite Systems 宽带多媒体卫星系统的非线性干扰抑制

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409391

M. Diaz, N. Courville, C. Mosquera, G. Liva, G. Corazza

引用次数: 80

High Altitude Platform (HAP) Driven Smart Radios: A Novel Concept 高空平台(HAP)驱动的智能无线电:一个新概念

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409416

S. Bayhan, G. Giir, F. Alagoz

{"title":"High Altitude Platform (HAP) Driven Smart Radios: A Novel Concept","authors":"S. Bayhan, G. Giir, F. Alagoz","doi":"10.1109/IWSSC.2007.4409416","DOIUrl":"https://doi.org/10.1109/IWSSC.2007.4409416","url":null,"abstract":"Spectrum scarcity experienced due to low utilization of some spectrum bands shows that there is a need for new regulations for spectrum allocation. Static allocation over a wide area, usually a city, makes the spectrum use non efficient. In order to use spectrum more efficiently, cognitive radio concept has been introduced. A cognitive radio is a paradigm for wireless communication in which either network or wireless node itself changes particular transmission or reception parameters to execute its tasks efficiently without interfering with the licensed users. Therefore, cognitive radio (CR) is promising to address portability, interoperability and quick and cost effective development, upgrade and maintenance of waveforms among multiple and varying communications platforms to enable an integrated and ubiquitous communication infrastructure. In this paper, we present a novel concept, namely high altitude platform (HAP) driven smart radios (HDSR), where CR devices are dynamically configured and policies for dynamic spectrum access are beamed with the assistance of a HAP and a back end satellite subsystem. The \"proof-of-concept\" for the proposed system is performed by a set of simulations. In these simulations, some primary IEEE 802.11b/g users communicate in infrastructure mode through three base stations while some secondary users having different priorities for the available spectrum communicate opportunistically.","PeriodicalId":286578,"journal":{"name":"2007 International Workshop on Satellite and Space Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130997729","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: 8

Power-measurement-based relative localization in GSM cellular networks GSM蜂窝网络中基于功率测量的相对定位

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409433

F. Lo Piccolo, N. B. Melazzi, D. Giustiniano

{"title":"Power-measurement-based relative localization in GSM cellular networks","authors":"F. Lo Piccolo, N. B. Melazzi, D. Giustiniano","doi":"10.1109/IWSSC.2007.4409433","DOIUrl":"https://doi.org/10.1109/IWSSC.2007.4409433","url":null,"abstract":"This position paper aims at proposing a new relative localization strategy for GSM cellular networks. We in particular consider a GSM network scenario where only a limited number of mobile phones is at known positions. This is the case of mobile phones which are equipped with satellite navigation receivers and know their absolute position. Such mobile phones will be referred to as located mobile phones. Mobile phones which either are not equipped with satellite navigation receivers or are out of coverage of their satellite navigation receivers do not know their absolute position and they will be referred to as un-located mobile phones. In both cases un-located mobile phones do not know their absolute position. Relative localization means then to locate the un-located mobile phones by exploiting the presence of neighbor located mobile phones and the communication capabilities of all GSM mobile phones. The idea arises from the observation that existing GPS-based positioning methods for GSM networks allow positioning only the GPS-enabled mobile phones that are in line of sight with at least four satellites. On the contrary, relative localization would allow locating both GPS-unequipped mobile phones and GPS-enabled mobile phones which are out of coverage. The proposed localization scheme is based on power level measurements, and it does not require network infrastructure changes, differently from positioning methods based on timing measurements. In this paper we identify and analyze the main related issues, and we sketch a possible solution.","PeriodicalId":286578,"journal":{"name":"2007 International Workshop on Satellite and Space Communications","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132375315","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: 5

TCP's protocol radius: the distance where timers prevent communication TCP的协议半径:计时器阻止通信的距离

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409409

L. Wood, C. Peoples, G. Parr, B. Scotney, A. Moore

引用次数: 17

On the Relation between Mobility and Rainfall Effects in Ku/Ka-band Line-of-Sight Land Mobile Satellite Channels: An Analytical Statistical Approach Ku/ ka波段陆地移动卫星视距通道机动性与降雨效应的关系:一种分析统计方法

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409385

K. Liolis, A. Bolea-Alamaac, R. Prieto-Cerdeira, A. Panagopoulos, A. Martellucci

{"title":"On the Relation between Mobility and Rainfall Effects in Ku/Ka-band Line-of-Sight Land Mobile Satellite Channels: An Analytical Statistical Approach","authors":"K. Liolis, A. Bolea-Alamaac, R. Prieto-Cerdeira, A. Panagopoulos, A. Martellucci","doi":"10.1109/IWSSC.2007.4409385","DOIUrl":"https://doi.org/10.1109/IWSSC.2007.4409385","url":null,"abstract":"The candidate frequency bands for the extension of the DVB-S2/RCS broadband satellite systems to fully support mobility are the Ku (12/14 GHz) and Ka (20/30 GHz). At these frequencies, rainfall is a significant propagation impairment which has to be taken into account together with other propagation effects due to mobility, such as multipath, shadowing and blockage. Experimental measurement campaigns conducted so far for Ku/Ka-band land mobile satellite (LMS) channels have mainly focused on the characterization of the mobility effects and have not considered any possible relation between the mobility and rainfall effects. However, recent limited work has indicated that these two fading sources are not independent. The present analysis represents a first approximation addressing this open problem. Emphasis is put on the line-of-sight (LOS) state of a Ku/Ka-band LMS channel, which can be modeled by the Ricean distribution and a high K-factor. A novel analytical model relating the Ricean K-factor with the rain fading effects is presented based on which, an analytical prediction model for the distribution of the Ricean K-factor is derived. The proposed analysis is flexible, can be applied on a global scale and incorporate the impact of several important operational, climatic and geometrical parameters of a mobile satellite system on its channel multipath behavior. Useful numerical results are provided, the need for further experimental verification data is pointed out and specific future planned work is also mentioned.","PeriodicalId":286578,"journal":{"name":"2007 International Workshop on Satellite and Space Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129207673","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: 7

Network Layer Security: Design for A Cross Layer Architecture 网络层安全:跨层架构的设计

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409429

S. Ramachandran, G. Fairhurs, M. Luglio, C. Roseti, S. Provenzano

引用次数: 4

SIMO Diversity with Antenna Selection for DVB-S2/RCS in LMS Scenarios LMS场景下带天线选择的DVB-S2/RCS SIMO分集

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409426

S. Cioni, A. Vanelli-Coralli, G. Corazza, J. Vicario, M. Castro

引用次数: 5

Satellite Communications: Research Trends and Open Issues 卫星通信:研究趋势和开放问题

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409393

A. Vanelli-Coralli, G. Corazza, G. Karagiannidis, P. Mathiopoulos, D. Michalopoulos, Carlos Mosquera, S. Papaharalabos, Sandro Scalise

引用次数: 69

Remote non-linearity detection via burst power dithering and EM based SNR Estimation 基于突发功率抖动和电磁信噪比估计的远程非线性检测

2007 International Workshop on Satellite and Space Communications Pub Date : 2007-12-26 DOI: 10.1109/IWSSC.2007.4409419

A. Das, M. Miller

引用次数: 10