Pub Date : 2020-10-06DOI: 10.1109/GCWOT49901.2020.9391609
G. Verma
This research work proposed a low powered design of arithmetic and logical unit for IOT centric processor architectures. As ALU is the main computation contraption in almost all the processors and controllers architectures deployed on IOT boards, due to which there is a high probability of switching that leads to high dissipation of power in the chip. The proposed architecture of ALU used the combination of clock gating and one hot coding technique termed as CGOH which ensures less switching activity and unique selection of distinct operations at that instant of time. The proposed architecture has been coded in VHDL & tested using Xpower Analyser available in Xilinx ISE 14.1 for different IOT centric processor architectures. The results are analysed and tested for different frequencies as per processor architecture on Virtex FPGA and shows significant power improvement as frequency increases towards higher range.
本研究提出了一种以物联网为中心的处理器架构的低功耗算法和逻辑单元设计。由于ALU是部署在物联网板上的几乎所有处理器和控制器架构中的主要计算装置，因此有很高的切换概率，导致芯片中的高功耗。所提出的ALU架构采用时钟门控和一种称为CGOH的热编码技术的组合，以确保较少的切换活动和在该时刻唯一选择不同的操作。所提出的架构已在VHDL中进行编码，并使用Xpower analyzer在Xilinx ISE 14.1中针对不同的物联网中心处理器架构进行测试。根据Virtex FPGA上的处理器架构，对不同频率的结果进行了分析和测试，结果表明，随着频率向更高范围增加，功耗显著提高。
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Pub Date : 2020-10-06DOI: 10.1109/GCWOT49901.2020.9391633
Mohsin Murad, I. Tasadduq, P. Otero
Underwater acoustic (UWA) communication techniques have gained popularity for wireless communication in shallow and deep seas. Orthogonal frequency division multiplexing (OFDM) has established to be a reliable multicarrier modulation method for a UWA communication for fending-off inter symbol interference (ISI). Since the UWA channel happens to be frequency selective in nature because of having multipath signals as a result of transmitted signals bouncing off the sea floor and/or the surface, equalization techniques must be utilized to counter the effect of fading. Therefore, we propose a least-squares error (LSE) based channel estimation technique using pilot subcarriers for UWA OFDM. Simulation results using a Rician fading based underwater channel model show that a reasonable number for the pilots is one-fourth of the number of sub-carriers. Any further increase in the number of pilots does not improve error performance. Moreover, error performance degrades as the energy of the pilots is increased.
{"title":"Pilots based LSE Channel Estimation for Underwater Acoustic OFDM Communication","authors":"Mohsin Murad, I. Tasadduq, P. Otero","doi":"10.1109/GCWOT49901.2020.9391633","DOIUrl":"https://doi.org/10.1109/GCWOT49901.2020.9391633","url":null,"abstract":"Underwater acoustic (UWA) communication techniques have gained popularity for wireless communication in shallow and deep seas. Orthogonal frequency division multiplexing (OFDM) has established to be a reliable multicarrier modulation method for a UWA communication for fending-off inter symbol interference (ISI). Since the UWA channel happens to be frequency selective in nature because of having multipath signals as a result of transmitted signals bouncing off the sea floor and/or the surface, equalization techniques must be utilized to counter the effect of fading. Therefore, we propose a least-squares error (LSE) based channel estimation technique using pilot subcarriers for UWA OFDM. Simulation results using a Rician fading based underwater channel model show that a reasonable number for the pilots is one-fourth of the number of sub-carriers. Any further increase in the number of pilots does not improve error performance. Moreover, error performance degrades as the energy of the pilots is increased.","PeriodicalId":157662,"journal":{"name":"2020 Global Conference on Wireless and Optical Technologies (GCWOT)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127976288","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}
Pub Date : 2020-10-06DOI: 10.1109/GCWOT49901.2020.9391611
L. Farhi, Farhan Ur Rehman
This electronic document This paper aims the signal identification of underwater objects using Autoregressive Moving Average with Exogenous excitation model in such a way that the outcome of the model is like actual measurements. It is used for parameter estimation. This will be validated by comparing the output of the actual system with the output generated by ARMX and various other models including autoregressive with exogenous variables and Box-Jenkins models, for the same given input signal. Mean square error criterion will be utilized to evaluate the results in frequency and time domains. Initial results illustrate that ARMX predicts the acoustic scattering response with an accuracy of 97% while ARX provides an accuracy of 78% and BJ model poorly estimates the signal with an accuracy of 35%. ARMX also provides a higher accuracy of detection by 7-8% as compared to existing methodologies hence proving to be a better option than current strategies
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Pub Date : 2020-10-06DOI: 10.1109/GCWOT49901.2020.9391598
Atif Siddiqui, Muhammad Yousuf Irfan Zia, P. Otero
Electronic companies launch new products frequently and spend a lot of time to verify their designs. These designs are verified through rigorous validation carried out using several pre manufacturing tests. The products are ready for manufacturing after passing these tests. At this stage, the companies setup test-sites for testing these products, which are different from validation tests. At the moment there is no standard way of deciding how to setup a test-site. Normally the parameters used for taking this decision include the type of testing required, test partial or complete batch, type of equipment to be used etc. The existing techniques rely on few parameters and the selection of these parameters also vary due to lack of standard method. This paper is a step towards defining a common approach to setup test sites. In this research a software application is developed using LabVIEW to implement a standard way of setting up a test-site. The software prompts test site design authority to enter parameters required to setup a test site using voice of customer (VoC), figure of merit (FoM), database (DB) and test readiness review (TRR) interfaces. This application is linked to a database containing test equipment details and previous test sites data like test jigs, interface adapters, estimated and actual test times, first time yield etc. Based on the user input data the software performs analysis and generate reports to setup a test site and also evaluate test readiness of the test site. This approach incorporates most of the techniques required to setup for most of the electronic products.
{"title":"A Methodology to Design Test Sites for Electronic Products based on Figure-of-Merit","authors":"Atif Siddiqui, Muhammad Yousuf Irfan Zia, P. Otero","doi":"10.1109/GCWOT49901.2020.9391598","DOIUrl":"https://doi.org/10.1109/GCWOT49901.2020.9391598","url":null,"abstract":"Electronic companies launch new products frequently and spend a lot of time to verify their designs. These designs are verified through rigorous validation carried out using several pre manufacturing tests. The products are ready for manufacturing after passing these tests. At this stage, the companies setup test-sites for testing these products, which are different from validation tests. At the moment there is no standard way of deciding how to setup a test-site. Normally the parameters used for taking this decision include the type of testing required, test partial or complete batch, type of equipment to be used etc. The existing techniques rely on few parameters and the selection of these parameters also vary due to lack of standard method. This paper is a step towards defining a common approach to setup test sites. In this research a software application is developed using LabVIEW to implement a standard way of setting up a test-site. The software prompts test site design authority to enter parameters required to setup a test site using voice of customer (VoC), figure of merit (FoM), database (DB) and test readiness review (TRR) interfaces. This application is linked to a database containing test equipment details and previous test sites data like test jigs, interface adapters, estimated and actual test times, first time yield etc. Based on the user input data the software performs analysis and generate reports to setup a test site and also evaluate test readiness of the test site. This approach incorporates most of the techniques required to setup for most of the electronic products.","PeriodicalId":157662,"journal":{"name":"2020 Global Conference on Wireless and Optical Technologies (GCWOT)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120952904","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}
Pub Date : 2020-07-05DOI: 10.1109/cw49994.2020.00006
Organization Committee
组织委员会
{"title":"Organization Committee","authors":"","doi":"10.1109/cw49994.2020.00006","DOIUrl":"https://doi.org/10.1109/cw49994.2020.00006","url":null,"abstract":"Organization Committee","PeriodicalId":157662,"journal":{"name":"2020 Global Conference on Wireless and Optical Technologies (GCWOT)","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130773373","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}
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