Pub Date : 2014-06-24DOI: 10.1109/NAECON.2014.7045782
Raqibul Hasan, T. Taha
Existing studies have demonstrated the use of memristor crossbars for learning linearly separable functions. The memristors are used as analog synaptic weights, thus allowing the memristor crossbar to evaluate a large number of multiplication and addition operations concurrently in the analog domain. Non-linearly separable functions can be implemented by cascading two or more crossbars, with each crossbar implementing a linearly separable function. The training circuits for these cascaded crossbars implementing non-linearly separable functions requires more complex logic than for linearly separable functions. In this paper we have implemented non-linear classifiers utilizing multiple linear separators and thus can utilize a simpler training circuit. We have examined the implementation of Boolean functions and motion detection applications as case studies.
{"title":"Memristor crossbar based low cost classifiers and their applications","authors":"Raqibul Hasan, T. Taha","doi":"10.1109/NAECON.2014.7045782","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045782","url":null,"abstract":"Existing studies have demonstrated the use of memristor crossbars for learning linearly separable functions. The memristors are used as analog synaptic weights, thus allowing the memristor crossbar to evaluate a large number of multiplication and addition operations concurrently in the analog domain. Non-linearly separable functions can be implemented by cascading two or more crossbars, with each crossbar implementing a linearly separable function. The training circuits for these cascaded crossbars implementing non-linearly separable functions requires more complex logic than for linearly separable functions. In this paper we have implemented non-linear classifiers utilizing multiple linear separators and thus can utilize a simpler training circuit. We have examined the implementation of Boolean functions and motion detection applications as case studies.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"539 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133318885","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045800
A. N. Gutierrez, A. Jennings
This paper describes the algorithm created to produce realistic cloudy aerial images using pictures of clouds taken from ground level. After performing a one-time manual operation, this otherwise autonomous algorithm produces a single aerial image overlaid with cloud imagery that is capable of retaining the natural transparency of the clouds.
{"title":"Cloud-induced uncertainty for visual navigation: Development of cloud templates","authors":"A. N. Gutierrez, A. Jennings","doi":"10.1109/NAECON.2014.7045800","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045800","url":null,"abstract":"This paper describes the algorithm created to produce realistic cloudy aerial images using pictures of clouds taken from ground level. After performing a one-time manual operation, this otherwise autonomous algorithm produces a single aerial image overlaid with cloud imagery that is capable of retaining the natural transparency of the clouds.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124028348","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045846
Siyang Cao, Yuan F. Zheng, R. Ewing
Previously we have presented that by using a wavelet-based waveform called Chirp-Z, sidelobes in the range detection can be significantly reduced. In this paper, we describe the use of the wavelet-based waveform in velocity detection by the Doppler frequency. We have compared the results with conventional waveform using linear frequency modulation (LFM) for both range and velocity detections. Analysis and simulation results have shown that the wavelet-based waveforms achieve higher resolution in velocity as well as range detections than LFM. Further study shows that the wavelet-based waveform can be applied in SAR to acquire images of higher resolution.
{"title":"On the doppler effect to the wavelet-based radar waveform","authors":"Siyang Cao, Yuan F. Zheng, R. Ewing","doi":"10.1109/NAECON.2014.7045846","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045846","url":null,"abstract":"Previously we have presented that by using a wavelet-based waveform called Chirp-Z, sidelobes in the range detection can be significantly reduced. In this paper, we describe the use of the wavelet-based waveform in velocity detection by the Doppler frequency. We have compared the results with conventional waveform using linear frequency modulation (LFM) for both range and velocity detections. Analysis and simulation results have shown that the wavelet-based waveforms achieve higher resolution in velocity as well as range detections than LFM. Further study shows that the wavelet-based waveform can be applied in SAR to acquire images of higher resolution.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124535792","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045845
Balsam Dakhil, Yuan F. Zheng, R. Ewing
A new compressed image sensing approach is presented. The approach departs from conventional sensing mechanism which seeks incoherency between the sensing and representation vectors. The subspace where most energy of the image lies in is first identified (estimated). Sensing vectors are then selected in the subspace. In doing so, base vectors of discrete cosine transform are used as representation vectors, and low-frequency members of the base vectors are considered to form the subspace. Of those selected base vectors some are used as sensing vectors which are phase shifted to enhance incoherency. Experimental results prove that the new approach is significantly better than random sensing as previously used for compressed sensing.
{"title":"Subspace imaging compressive sensing","authors":"Balsam Dakhil, Yuan F. Zheng, R. Ewing","doi":"10.1109/NAECON.2014.7045845","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045845","url":null,"abstract":"A new compressed image sensing approach is presented. The approach departs from conventional sensing mechanism which seeks incoherency between the sensing and representation vectors. The subspace where most energy of the image lies in is first identified (estimated). Sensing vectors are then selected in the subspace. In doing so, base vectors of discrete cosine transform are used as representation vectors, and low-frequency members of the base vectors are considered to form the subspace. Of those selected base vectors some are used as sensing vectors which are phase shifted to enhance incoherency. Experimental results prove that the new approach is significantly better than random sensing as previously used for compressed sensing.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129301504","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045825
Matthieu Martin, J. Middendorf, E. Brown
We present the performance of ultrafast ErAs:GaAs photoconductive-switch antennas measured with a 1550-nm time-domain spectrometer. A 1%- and 2%-Er ErAs:GaAs PC switch were tested and showed detected transmitted frequencies up to at least 2.5 and 4.0 THz, respectively, with a dynamic range of ~50 and ~55 dB below ~200 GHz.
{"title":"1550-nm time-domain study of ErAs:GaAs photoconductive switches as a function of the erbium concentration","authors":"Matthieu Martin, J. Middendorf, E. Brown","doi":"10.1109/NAECON.2014.7045825","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045825","url":null,"abstract":"We present the performance of ultrafast ErAs:GaAs photoconductive-switch antennas measured with a 1550-nm time-domain spectrometer. A 1%- and 2%-Er ErAs:GaAs PC switch were tested and showed detected transmitted frequencies up to at least 2.5 and 4.0 THz, respectively, with a dynamic range of ~50 and ~55 dB below ~200 GHz.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115468997","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045832
Tyler Moody, S. Ren, R. Ewing
The design of a high speed current steering DAC using 90 nm CMOS technology is presented. The resolution for this design is 10 bits, segmented into 6 thermometer encoded current cells and 4 binary weighted current cells. Thermometer encoding is used instead of binary coded decimal to reduce glitches since only one bit changes at a time. The design methodology of the sub-components such as current cell, thermometer encoder, and bias circuits are discussed. The simulation results show the input bandwidth of the DAC is 250 MHz.
{"title":"10 bit current steering DAC in 90 nm technology","authors":"Tyler Moody, S. Ren, R. Ewing","doi":"10.1109/NAECON.2014.7045832","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045832","url":null,"abstract":"The design of a high speed current steering DAC using 90 nm CMOS technology is presented. The resolution for this design is 10 bits, segmented into 6 thermometer encoded current cells and 4 binary weighted current cells. Thermometer encoding is used instead of binary coded decimal to reduce glitches since only one bit changes at a time. The design methodology of the sub-components such as current cell, thermometer encoder, and bias circuits are discussed. The simulation results show the input bandwidth of the DAC is 250 MHz.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114528040","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045831
L. Viveros, Weidong Zhang, E. Brown, A. Bykhovski
This report presents THz spectroscopy as a valuable tool to discover unique signatures in a variety of analytes. Biomolecules and bacterial spores have been demonstrated to have characteristic signatures in the absorption patterns. Examples presented are the absorption band of thymine and the double bands of Bacillus sp. spores. In the case of thymine, the absorption band exactly matched the results of molecular modeling at 1.27 THz. The signatures are associated with collective polar vibrations within the structures of the materials, and can be used for fingerprint type sensing.
{"title":"Bioinspired THz applications for chemical analysis and microorganism fingerprinting","authors":"L. Viveros, Weidong Zhang, E. Brown, A. Bykhovski","doi":"10.1109/NAECON.2014.7045831","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045831","url":null,"abstract":"This report presents THz spectroscopy as a valuable tool to discover unique signatures in a variety of analytes. Biomolecules and bacterial spores have been demonstrated to have characteristic signatures in the absorption patterns. Examples presented are the absorption band of thymine and the double bands of Bacillus sp. spores. In the case of thymine, the absorption band exactly matched the results of molecular modeling at 1.27 THz. The signatures are associated with collective polar vibrations within the structures of the materials, and can be used for fingerprint type sensing.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122702730","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045797
Blanca Delgado, Khalid Tahboub, E. Delp
Video surveillance systems that contain a large number of cameras makes the continuous monitoring of the video feeds nearly an impossible task. A transit or transportation authority usually deploys a video surveillance system to monitor and identify events in the system such as crowd behavior and crime. In this paper we present a method for automatically detecting people jumping or falling off a train platform. An experimental evaluation is described using a dataset that was recorded at a train station.
{"title":"Automatic detection of abnormal human events on train platforms","authors":"Blanca Delgado, Khalid Tahboub, E. Delp","doi":"10.1109/NAECON.2014.7045797","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045797","url":null,"abstract":"Video surveillance systems that contain a large number of cameras makes the continuous monitoring of the video feeds nearly an impossible task. A transit or transportation authority usually deploys a video surveillance system to monitor and identify events in the system such as crowd behavior and crime. In this paper we present a method for automatically detecting people jumping or falling off a train platform. An experimental evaluation is described using a dataset that was recorded at a train station.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122143715","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045838
M. Mustapa, M. Niamat
Physical Unclonable Function (PUF) is a function that cannot be modeled as it utilizes the random process variations on a silicon chip to generate a unique bit stream of `1's and `0's (response bits) which can be used for authentication and cryptography applications. As PUF is highly rely upon process variations, the response bits generated are governed by the systematic process variation instead of the stochastic process variation, which will reduce the randomness in the response bits. In this paper we propose the novel Random Patch Mixer (RPM) technique to dismiss the systematic variation effect on the response bits generated. We applied the RPM technique on data obtained from 29 Spartan 3E FPGA chips. We showed that our RPM technique has successfully dismissed the systematic variation effect on the response bits generated from the ROPUF on FPGA. We also proved that the responses generated by applying the RPM Technique passed the National Institute of Standards and Technology NIST statistical test for randomness.
物理不可克隆函数(PUF)是一种无法建模的函数，因为它利用硅芯片上的随机过程变化来生成唯一的“1”和“0”(响应位)比特流，可用于身份验证和加密应用程序。由于PUF高度依赖过程变化，因此产生的响应位由系统过程变化而不是随机过程变化控制，从而降低了响应位的随机性。在本文中，我们提出了一种新的随机补片混频器(RPM)技术来消除系统变化对产生的响应位的影响。我们将RPM技术应用于从29个Spartan 3E FPGA芯片获得的数据。我们表明，我们的RPM技术已经成功地消除了FPGA上ROPUF产生的响应位的系统变化效应。我们还证明了应用RPM技术产生的响应通过了美国国家标准与技术研究所NIST的随机性统计检验。
{"title":"Novel RPM technique to dismiss systematic variation for RO PUF on FPGA","authors":"M. Mustapa, M. Niamat","doi":"10.1109/NAECON.2014.7045838","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045838","url":null,"abstract":"Physical Unclonable Function (PUF) is a function that cannot be modeled as it utilizes the random process variations on a silicon chip to generate a unique bit stream of `1's and `0's (response bits) which can be used for authentication and cryptography applications. As PUF is highly rely upon process variations, the response bits generated are governed by the systematic process variation instead of the stochastic process variation, which will reduce the randomness in the response bits. In this paper we propose the novel Random Patch Mixer (RPM) technique to dismiss the systematic variation effect on the response bits generated. We applied the RPM technique on data obtained from 29 Spartan 3E FPGA chips. We showed that our RPM technique has successfully dismissed the systematic variation effect on the response bits generated from the ROPUF on FPGA. We also proved that the responses generated by applying the RPM Technique passed the National Institute of Standards and Technology NIST statistical test for randomness.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115067691","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045817
M. Lanzerotti, C. Cerny, R. K. Martin
This paper reviews the results of a generalized theoretical analysis of Tsui's phase measurement approach for detection of extremely weak radio signals to the situation in which there are N simultaneous signals, where one signal is strong, and N - 1 signals are weak. Applications to a multi-tier detection process for N = 2, N = 3, and N = 4 simultaneous signals are described. Signal parameters are extracted for the case of N = 2. This work has applications for electronic warfare receivers for detection and characterization of weak signals with unknown parameters.
{"title":"Phase calculation approaches for a multi-tier weak radio signal detection process with N simultaneous signals","authors":"M. Lanzerotti, C. Cerny, R. K. Martin","doi":"10.1109/NAECON.2014.7045817","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045817","url":null,"abstract":"This paper reviews the results of a generalized theoretical analysis of Tsui's phase measurement approach for detection of extremely weak radio signals to the situation in which there are N simultaneous signals, where one signal is strong, and N - 1 signals are weak. Applications to a multi-tier detection process for N = 2, N = 3, and N = 4 simultaneous signals are described. Signal parameters are extracted for the case of N = 2. This work has applications for electronic warfare receivers for detection and characterization of weak signals with unknown parameters.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130885026","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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