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2012 International Waveform Diversity & Design Conference (WDD)最新文献

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Using invariant features with a polarimetric forward-looking ground penetrating radar 使用不变特征与极化前视探地雷达
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311290
E. Chun, C. Chun
{"title":"Using invariant features with a polarimetric forward-looking ground penetrating radar","authors":"E. Chun, C. Chun","doi":"10.1109/WDD.2012.7311290","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311290","url":null,"abstract":"We built and tested a forward-looking polarimetric GPR which measured the scattering matrix of targets. The scattering matrix can be transformed to determine the polarizability angle, relative phase angle, and target magnitude. These quantities are invariant to rotations about the sensor-to-target axis. Measurements were made on dry sand without a target, sand with a buried polystyrene cylinder, and sand with a buried styrofoam cylinder. As frequency was swept the relative phase changed more rapidly when either cylinder was present compared to the sand alone. The relative phase may be a useful feature for detecting plastic objects and voids in sand.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128572737","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
Direct-path mitigation for ground-based RF tomography 地面射频层析成像的直接路径缓解
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311267
L. Monte, J. Parker
{"title":"Direct-path mitigation for ground-based RF tomography","authors":"L. Monte, J. Parker","doi":"10.1109/WDD.2012.7311267","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311267","url":null,"abstract":"A direct-path mitigation algorithm for ground-based Radio Frequency Tomography is presented. From measured data in frequency domain, the direct-path is isolated, characterized, and removed only through post processing. Simulations and experimental data are provided for performance and limitation analyses.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133079545","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
Chirp optimization using piecewise linear approach 使用分段线性方法的啁啾优化
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311265
M. Moldovan, C. Baylis, Michael Wicks, Joshua Martin, R. Marks
{"title":"Chirp optimization using piecewise linear approach","authors":"M. Moldovan, C. Baylis, Michael Wicks, Joshua Martin, R. Marks","doi":"10.1109/WDD.2012.7311265","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311265","url":null,"abstract":"A chirp optimization for in-band flatness under specific spectral constraints has been simulated in MATLAB using a search through piecewise linear characterizations of the chirp's time-frequency profile. In general, the piecewise linear chirp consists of both up- and down-chirps. An exhaustive search seeks the chirp best satisfying in-band energy and flatness criteria.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116661829","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
Waveform design for multistatic radar imaging using mutual information 基于互信息的多基地雷达成像波形设计
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311291
Zachary Chance, R. Raj, D. Love
{"title":"Waveform design for multistatic radar imaging using mutual information","authors":"Zachary Chance, R. Raj, D. Love","doi":"10.1109/WDD.2012.7311291","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311291","url":null,"abstract":"The topic of waveform design is investigated for a multistatic radar scenario where it is assumed that one radar sensor is transmitting while the remaining sensors receive. This is accomplished by using an information-theoretic measure (i.e., mutual information between the image and the radar return) as an objective function for waveform optimization. Simulations are given to illustrate performance gains in image quality metrics.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124847502","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
Radial velocity estimation of ground moving targets with a dual-frequency SAR 基于双频SAR的地面运动目标径向速度估计
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311318
Gaohuan Lv, Xingzhao Liu, Junfeng Wang, Kaizhi Wang
{"title":"Radial velocity estimation of ground moving targets with a dual-frequency SAR","authors":"Gaohuan Lv, Xingzhao Liu, Junfeng Wang, Kaizhi Wang","doi":"10.1109/WDD.2012.7311318","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311318","url":null,"abstract":"Radial velocity estimation is an important work in ground moving target indication using synthetic aperture radar, and we have designed a dual-frequency synthetic aperture radar (SAR) to perform this work. The estimation method is based on the estimate of the Doppler shift/centroid induced by the moving target without ambiguity using the two SAR images patch by patch which are generated by the transmitted pulses carried by the two frequencies. Furthermore, a method based on smear theory is used to extracted the moving target which have large azimuth but small radial velocity components, and by excluding the background the minimum detectable velocity becomes more small and the estimate becomes more accurate.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127518072","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
Waveform-agile track-before-detect for low observable targets 低可观测目标的波形敏捷探测前跟踪
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311293
Ryan Piwowarski, Brian O'Donnell, J. Zhang, A. Papandreou-Suppappola
{"title":"Waveform-agile track-before-detect for low observable targets","authors":"Ryan Piwowarski, Brian O'Donnell, J. Zhang, A. Papandreou-Suppappola","doi":"10.1109/WDD.2012.7311293","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311293","url":null,"abstract":"We investigate waveform agile selection for dynamic target tracking under low signal-to-noise ratio (SNR) conditions. Our approach combines two techniques aimed at increasing tracking performance. It uses track-before-detect (TBD) that employs unthresholded delay-Doppler measurements and is implemented using particle filtering. Integrated into the TBD is an adaptive waveform configuration algorithm that selects the transmit waveform parameters at each time step by minimizing the predicted mean-squared estimation error of the target's state. Using simulations to track a low SNR target, we demonstrate the increased performance of waveform-agile sensing (WAS)-TBD over TBD with fixed transmit waveforms.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129030595","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
Algebraic construction of MIMO radar waveforms MIMO雷达波形的代数构造
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311276
P. Vouras
{"title":"Algebraic construction of MIMO radar waveforms","authors":"P. Vouras","doi":"10.1109/WDD.2012.7311276","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311276","url":null,"abstract":"This paper describes a method for constructing waveforms such that the individual radars in a spatial Multiple Input Multiple Output (MIMO) radar system can simultaneously transmit pulse compression sequences yet avoid interference with each other. The waveform design algorithm is based on the matrix representations of finite abelian groups.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126809975","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
Application of a sparse time-frequency technique for targets with oscillatory fluctuations 具有振荡波动的目标稀疏时频技术的应用
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311314
M. Farshchian, I. Selesnick
{"title":"Application of a sparse time-frequency technique for targets with oscillatory fluctuations","authors":"M. Farshchian, I. Selesnick","doi":"10.1109/WDD.2012.7311314","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311314","url":null,"abstract":"In this paper, an application of the tunable Q-Factor wavelet transform (TQWT) to a maritime object classification problem is demonstrated. The TQWT, which depends on the two main parameters of the Q-factor and asymptotic redundancy, matches the oscillatory behaviour of the signal of interest when tuned. The approach, which differs from the Fourier and Wavelet transforms, decomposes a signal into a “high-Q-factor” and “low-Q-factor” component, and can be used to distinguish two radar range profiles of different oscillatory nature. The results of the paper show that the TQWT can provide sparse representation for some signals and that morphological component analysis (MCA) can be used to differentiate two radar signals based on their TQWT parameters.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127093181","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: 19
Spectrum sensing in cognitive radio with robust principal component analysis 基于鲁棒主成分分析的认知无线电频谱感知
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311263
S. Hou, R. Qiu, J. Browning, M. Wicks
{"title":"Spectrum sensing in cognitive radio with robust principal component analysis","authors":"S. Hou, R. Qiu, J. Browning, M. Wicks","doi":"10.1109/WDD.2012.7311263","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311263","url":null,"abstract":"Spectrum sensing is a cornerstone in cognitive radio. Covariance matrix based method has been widely used in spectrum sensing. As is well-known that the covariance matrix of white noise is proportional to the identity matrix which is sparse. On the other hand, the covariance matrix of signal is usually low-rank. Robust principal component analysis (PCA) has been proposed recently to recover the low-rank matrix which is corrupted by a sparse matrix with arbitrarily large magnitude non-zero entries. In this paper, robust PCA for spectrum sensing is proposed based on the sample covariance matrix. The received signal will be divided into two segments. Robust PCA will be applied to extract the low-rank matrices from the sample covariance matrices of both segments. The primary user's signal is detected if the discrepancy between the recovered low-rank matrices is smaller than a predefined threshold. The simulations are done both on the simulated and captured DTV signal. Also, the simulations that robust PCA is taken as a de-noising process for sample covariance matrix are also implemented in this paper.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125174923","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: 19
Range profiles from an experimental OFDM passive radar 实验OFDM无源雷达的距离剖面图
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311312
Jose R. Gutierrez del Arroyo, J. Jackson
{"title":"Range profiles from an experimental OFDM passive radar","authors":"Jose R. Gutierrez del Arroyo, J. Jackson","doi":"10.1109/WDD.2012.7311312","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311312","url":null,"abstract":"Modern communication systems provide myriad opportunities for passive radar applications. Orthogonal frequency division multiplexing (OFDM) is a popular waveform used widely in wireless communication networks today. Understanding the structure and potential of these networks becomes critical in future passive radar systems design and concept development. An experimental OFDM radar is developed and used to support ground radar imaging research using these commercial OFDM waveforms. This paper presents one-dimensional range profile results using the experimental radar setup. A brief discussion on OFDM range compression is also presented.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128051444","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
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