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Embedded ethernet microcontroller for optical monitoring 用于光学监测的嵌入式以太网微控制器
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352672
Mohamad Syuhaimi Ab-Rahman, M. Saupe, A. Premadi, K. Jumari
{"title":"Embedded ethernet microcontroller for optical monitoring","authors":"Mohamad Syuhaimi Ab-Rahman, M. Saupe, A. Premadi, K. Jumari","doi":"10.1109/ICONSPACE.2009.5352672","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352672","url":null,"abstract":"In this paper, we presented the embedded Ethernet microcontroller for optical monitoring. This design is used for fiber monitoring in the FTTH system. The embedded Ethernet microcontroller is used to control the 1x8 optical switches where this switch is to reroute the optical signal in the FTTH system. These systems consisting of two primaries part communicating each other: i)A server consisting of a microcontroller PIC18F97J60 with built-in embedded Ethernet controller module and ii) a client computer. In this system, a microcontroller system is act like web server that store the web pages in their memory, a client computer can access this web page using web browser to monitor and control the microcontroller where the microcontroller is used to control the path of the optical signal by using optical switch.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129469938","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
Regional ionosphere maps over Malaysia during solar minimum 太阳活动极小期马来西亚区域电离层图
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352648
N. Y. Wei, S. Bahari, M. Abdullah, B. Yatim
{"title":"Regional ionosphere maps over Malaysia during solar minimum","authors":"N. Y. Wei, S. Bahari, M. Abdullah, B. Yatim","doi":"10.1109/ICONSPACE.2009.5352648","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352648","url":null,"abstract":"The regional ionosphere maps over Malaysia were studied during the minimum phase of solar cycle 23. Fifty-seven GPS RTK reference stations for the network covering the whole of Malaysia managed by JUPEM were used in this analysis. TEC is the measure of the number of electrons along the path from the satellite and is reported as TEC Units (1 TECU = 1×1016 electrons). The observations of oblique TEC can be obtained from the delays of GPS signals on the carrier frequencies of L1=1575.45 MHz and L2=1227.6 MHz under the assumption of infinitesimal single-layer ionospheric model. For this study, the data on 5th May 2007 and 23rd May 2007 was used. Results show that TEC maps derived from GPS RTK vary with all the geomagnetic activity indices.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129814908","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
Portable wireless CATV tester unit with solar panel 便携式无线有线电视测试仪单元与太阳能电池板
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352677
M. Ab-Rahman, Suria Che Rosli, Z. Zakaria, Faridah Jaafar, K. Jumari
{"title":"Portable wireless CATV tester unit with solar panel","authors":"M. Ab-Rahman, Suria Che Rosli, Z. Zakaria, Faridah Jaafar, K. Jumari","doi":"10.1109/ICONSPACE.2009.5352677","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352677","url":null,"abstract":"Fiber-to-the-home (FTTH) network system can transmit signal at a high speed level such as transmitting video, data and voice signals to the users. However, we do not know whether the send signals are in a good condition or not. Therefore, a Community Access Television, CATV tester device is needed. An upgrading from first generation CATV Tester Unit, a wireless technology is applied through the implementation of audio video transmitter and receiver. This tester will display the received signal on the display panel, if the signal received by the CATV tester device is accompanied by undesired signals and noises, it will then indicate that the main (FTTH trunk line) is probably damaged and needed to be repaired. With the application of wireless technology, video signal that is transmitted through fiber optic cable located in the underground can be simply detected and determined whether it is functioning or not. An addition of solar panel as battery charger for power saving is also applied.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114454193","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
Multi access detection system for line monitoring in fiber to the home (FTTH) 用于光纤到户(FTTH)线路监控的多址检测系统
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352656
Mastang, M. Ab-Rahman, K. Jumari
{"title":"Multi access detection system for line monitoring in fiber to the home (FTTH)","authors":"Mastang, M. Ab-Rahman, K. Jumari","doi":"10.1109/ICONSPACE.2009.5352656","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352656","url":null,"abstract":"This paper presented a status monitoring system designed to improve fiber-to-the-home (FTTH) engineering work by enabling technicians in central offices to observe, in real time, the usage state of FTTH services for each line in detail when they perform operations such as changing cable routes. This will reduce service interruptions. For FTTH access services, optical network units (ONUs) are installed in customer premises and optical line terminals (OLTs) are installed in the central office. The monitoring system is connected to the fiber section between ONUs and an OLT, and it receives the upstream optical signal from the ONU. This optical signal is converted to 1-bit signal to be processed by computer. Every ONU is equipped with wireless transmitter and PIC microcontroller to send signal to wireless receiver (multipoint to point). The display program is created to monitor the condition of FTTH lines.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130246917","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
GPS-based water vapour variability in declining phase of solar cycle 23: A possibility coupling? 基于gps的第23太阳周期下降期水汽变率:一种可能的耦合?
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352636
W. Suparta
{"title":"GPS-based water vapour variability in declining phase of solar cycle 23: A possibility coupling?","authors":"W. Suparta","doi":"10.1109/ICONSPACE.2009.5352636","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352636","url":null,"abstract":"Sun-Earth coupling studies can explain some physical mechanisms of how solar activity exerts their influences on weather/climate changes. Using the GPS-derived precipitable water vapour (PWV) measurements as a tool to study water vapour variability, it is fundamental to calculation of a reliable weather forecast for advancement space weather prediction and such methods provide suitable platforms for the studies of solar-climate relationship. This paper presents an analysis of the PWV variability and its responses to solar activity during the declining phase of solar cycle 23.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121398124","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: 0
The relationship between the ionospheric and magnetic disturbances during the 28 March 2005 Sumatran earthquake 2005年3月28日苏门答腊地震中电离层与磁扰动的关系
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352645
A. Hasbi, M. A. Momani, M. A. Mohd. Ali, N. Misran
{"title":"The relationship between the ionospheric and magnetic disturbances during the 28 March 2005 Sumatran earthquake","authors":"A. Hasbi, M. A. Momani, M. A. Mohd. Ali, N. Misran","doi":"10.1109/ICONSPACE.2009.5352645","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352645","url":null,"abstract":"The paper investigates the ionospheric and geomagnetic responses during the 28 March 2005 earthquake in Sumatra using measurements from 7 GPS stations and a magnetometer station in the near zone of the epicenter. The earthquake occurred during low solar and geomagnetic activity. TEC oscillations of short periods in the range of 4.8 to 10 minutes were observed at GPS stations located to the northeast of the epicenter, while no significant disturbances were observed relatively east and south of the epicenter. The magnetic field measurements show rapid fluctuations of 4 to 5 seconds shortly after the earthquake, followed by a Pc5 pulsation of 4.8 minutes detected about 11 minutes after the earthquake. The comparison between the ionospheric and geomagnetic responses shows a good agreement in the period and time lag of the peak disturbance arrival, i.e. about 11 to 13 minutes after the earthquake.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132671939","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
Web services for monitoring system in optical communication 光通信监控系统的Web服务
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352667
A. Premadi, N. Chuan, M. Ab-Rahman, M. Saupe, K. Jumari
{"title":"Web services for monitoring system in optical communication","authors":"A. Premadi, N. Chuan, M. Ab-Rahman, M. Saupe, K. Jumari","doi":"10.1109/ICONSPACE.2009.5352667","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352667","url":null,"abstract":"This paper proposed an application of microcontroller embedded Ethernet to monitoring system in optical communication. We focus on distributed real-time systems, which stand to benefit most from the use of web services technology. For this propose the PIC microcontroller is used control any optical switch connected to it, and send information to internet. It was successfully identified without affecting communication signal transmission, with the specification available a complete system can be made with 24 man-hours. The system will to improve the service reliability and reduce the maintenance cost.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127215779","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
Calibration of a newly designed multispectral ultraviolet sensor based on AlGaN photodiodes using solar radiation 基于AlGaN光电二极管的多光谱紫外传感器的太阳辐射标定
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352659
J. Theyirakumar, G. Gopir, B. Yatim, H. Sanusi, P. I. Mahmud, Woon Chin Yek, Kelvin Tan Aik Boo
{"title":"Calibration of a newly designed multispectral ultraviolet sensor based on AlGaN photodiodes using solar radiation","authors":"J. Theyirakumar, G. Gopir, B. Yatim, H. Sanusi, P. I. Mahmud, Woon Chin Yek, Kelvin Tan Aik Boo","doi":"10.1109/ICONSPACE.2009.5352659","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352659","url":null,"abstract":"A newly designed multispectral ultraviolet (UV) sensor based on aluminium gallium nitride (AlGaN) photodiodes was calibrated using the solar UV radiation in three regions namely ultraviolet A (UVA), ultraviolet B (UVB) and ultraviolet C (UVC). This UV sensor which was designed with a transimpedance amplifier system, measures the dc voltage output of direct solar UVA, UVB and UVC radiation (VA,VB and VC) in Bangi, Malaysia (2.92 °N, 101.78 °E, 50 m above sea level). For calibration, this designed UV sensor were used to measure simultaneously with a silicon-based UVA Light Sensor designed with PASCO PASPORT interface, Xplorer GLX Datalogger which measures the UVA radiation intensity, IA. As a result, a linear relationships between the multispectral UV voltages and UVA intensity were obtained and thus, three linear equations of UVA, UVB and UVC radiation intensity as a function of the multispectral UV voltages were derived. Intensity ratios between the three UV region were deduced from the derived intensity equations. The multispectral UV radiation voltages were further analyzed by plotting the UV voltage values with time. Thus, the multispectral UV sensor based on the AlGaN photodiodes was able to be calibrated successfully.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123160980","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
An efficient FPGA based prototyping platform for MIMO decoding 基于FPGA的高效MIMO解码原型平台
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352671
M. W. Numan, N. Misran, M. Islam
{"title":"An efficient FPGA based prototyping platform for MIMO decoding","authors":"M. W. Numan, N. Misran, M. Islam","doi":"10.1109/ICONSPACE.2009.5352671","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352671","url":null,"abstract":"Multiple-input multiple-output (MIMO) has emerged as a generic technique that promises to be a strong contender for 4G wireless systems. Even with extensive research on the design of transmission and reception algorithms, little is known about the complexity of hardware implementation. This paper proposes an efficient hardware prototype for MIMO decoding that utilizes the resources of the device by adopting the technique of parallelism. The decoder is designed and implemented as a part of MIMO testbed on a Xilinx Virtex™-4 XC4VLX60 Field Programmable Gate Arrays (FPGA) device. In this paper, a comprehensive explanation of the complete design process is provided, including an illustration of the tools used in its development. The decoder is developed based on modular design which simplifies system design, eases hardware update and facilitates testing the various modules in an independent manner.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115380923","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
Assessment of atmospheric optical thickness measured by handheld spectroradiometer for air pollution studies 空气污染研究中手持式光谱辐射计测量的大气光学厚度评估
2009 International Conference on Space Science and Communication Pub Date : 2009-12-15 DOI: 10.1109/ICONSPACE.2009.5352631
A. N. Ishak, Z. K. Nurlisman, N. Othman, H. Lim, M. MatJafri, N. M. Saleh
{"title":"Assessment of atmospheric optical thickness measured by handheld spectroradiometer for air pollution studies","authors":"A. N. Ishak, Z. K. Nurlisman, N. Othman, H. Lim, M. MatJafri, N. M. Saleh","doi":"10.1109/ICONSPACE.2009.5352631","DOIUrl":"https://doi.org/10.1109/ICONSPACE.2009.5352631","url":null,"abstract":"This study was conducted to observe the sky radiation for air quality retrieval from spectroradiometer measurements over USM campus. The objective of this study is to evaluate the performance of a spectroradiometer for providing useful remotely sensed data for air pollution studies. Aerosol optical thickness (AOT) values were derived from the atmospheric transmittance measurements. A well known Beer-Lambert-Bouguer law was applied to obtain aerosol optical thickness (AOT) from the atmospheric transmittance. Finally, the AOT map was generated using Kriging interpolation technique. This paper demonstrates the application of spectroradiometer data to retrieve AOT values in USM campus, Penang, Malaysia.","PeriodicalId":360685,"journal":{"name":"2009 International Conference on Space Science and Communication","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126092533","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: 0
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