2009 International Workshop on Satellite and Space Communications最新文献_第7页

Can satellites face trends? The case of Web 2.0 卫星能面对趋势吗?以Web 2.0为例

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286305

L. Caviglione

引用次数: 25

Iterative decodable block codes for high-speed free space optical communication 高速自由空间光通信的迭代可解码分组码

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286398

Yongxiong Ren, A. Dang, Hong Guo

引用次数: 0

Software Defined Phased Array Antenna architecture and design approach 软件定义相控阵天线结构与设计方法

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286400

P. Tosovsky

{"title":"Software Defined Phased Array Antenna architecture and design approach","authors":"P. Tosovsky","doi":"10.1109/IWSSC.2009.5286400","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286400","url":null,"abstract":"Software Defined Radio concept brought high degree of flexibility to radio communication links. The main idea of the concept is to carry most of signal processing to the digital domain where the processing can be driven by software. The same approach can be used for Software Defined Array Antenna. Every Antenna element of the array is equipped by analog-todigital conversion unit which samples a received signal. The Antenna element is constructed as a dual polarization unit; both polarization planes are sampled separately to the I/Q plane vector representation. The data are collected via digital bus by a central unit where the data are processed by adaptive beamforming and demodulation algorithm to maximize quality of desired signal. This architecture has several advantages; interconnection bus is purely digital (easier wiring design), mutual RF coupling between the Antenna units (typically via reference oscillator wiring) is effectively suppressed and the Antenna array is fully deployable without any extra effort. In connection with both polarization planes sampling, we obtain the receiver which is capable to receive signal with any polarization (include elliptical), placed to random part of spectrum within processed bandwidth and modulated by arbitrary type of modulation with maximum signal to noise ratio.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131737681","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

IEEE802.15.4 Wireless Sensor Network in Mars exploration scenario 火星探测场景中的IEEE802.15.4无线传感器网络

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286366

E. Del Re, Renato Pucci, L. Ronga

{"title":"IEEE802.15.4 Wireless Sensor Network in Mars exploration scenario","authors":"E. Del Re, Renato Pucci, L. Ronga","doi":"10.1109/IWSSC.2009.5286366","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286366","url":null,"abstract":"The IEEE 802.15.4 standard (ZigBee) provides low cost and low power connectivity for Wireless Sensor Network (WSN) devices that need a monthly or years duration of battery, with low DataRate and small dimensions. All such features fit pretty well the requirements of a space mission and for this reason the spatial community is investigating the possibility of using WSN in planetary exploration context, in particular on Mars. After an accurate analysis of the past missions retrieved data, we individuate the most common propagation contexts on Mars and we evaluate the performance of an IEEE802.15.4 standard based sensor network working at 2.4GHz for that contexts. In order to evaluate the applicability of the IEEE 802.15.4 standard to planetary exploration context, a characterization of the most common five frequency channel is obtained taking into account all the Martian geomorphologic, atmospheric and eolian features. Considering such frequency channels, thanks to Simulink and OMNET++ simulation models, network performances like Bit Error Rate (BER), Symbol Error Rate (SER) and Throughput are obtained. The possibility to implement a packet level coding is also investigated.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130337460","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

Optical wireless links in future space communications with high data rate demands 光无线链路在未来空间通信中具有高数据速率的要求

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286359

P. Brandl, T. Plank, E. Leitgeb

引用次数: 6

Optimum bit-mapping of TCH codes 最佳位映射的TCH码

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286417

F. Cercas, J. C. Silva, N. Souto, R. Dinis

引用次数: 3

Evaluation of TCP performance over emulated DVB-RCS scenario with multiple RCSTs 具有多个rcst的模拟DVB-RCS场景下TCP性能评估

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286320

F. Belli, M. Luglio, C. Roseti, F. Zampognaro

引用次数: 12

Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) codes for deep space and high data rate applications 准循环低密度奇偶校验(QC-LDPC)码用于深空和高数据速率应用

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286377

N. Andreadou, F. Pavlidou, S. Papaharalabos, P. Mathiopoulos

{"title":"Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) codes for deep space and high data rate applications","authors":"N. Andreadou, F. Pavlidou, S. Papaharalabos, P. Mathiopoulos","doi":"10.1109/IWSSC.2009.5286377","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286377","url":null,"abstract":"In this paper we investigate and compare the performance of a selected class of Low-Density Parity-Check (LDPC) codes, i.e. Quasi-Cyclic (QC) LDPC codes, against the currently used turbo codes for deep space and high data rate applications. This is useful in future updates of the channel code option used for such applications by the Consultative Committee for Space Data Systems (CCSDS). A wide range of different code rates is examined and the obtained Bit Error Rate (BER) performance versus the Bit Energy to Noise Spectral Density ratio (Eb/N0) is reported. Both low and high code rates are being studied, and specifically the 1/2, 1/3, 1/4 and 1/5 as well as the 2/3, 3/4 and 4/5 code rates are taken under consideration. The role of the iteration rounds in the decoding procedure of LDPC codes is also examined showing that QC-LDPC codes outperform the currently used CCSDS turbo codes. Another advantage of QC-LDPC codes is their simple encoding procedure, which reduces the encoding complexity. Since deep space applications are considered, the signals are transmitted over the Additive White Gaussian Noise (AWGN) channel, with the specific block size of 7136 bits.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114690751","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: 16

Transmitter and receiver processing specification for a unified ULE security extension 发送端和接收端处理规范为统一的ULE安全扩展

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286401

M. Noisternig, B. Collini-Nocker, P. Pillai, L. Liang, H. Cruickshank

引用次数: 3

Special session 3 (room 18) security 特别会议3(18室)安全

2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286411

P. Pillai, H. Cruickshank

引用次数: 0