{"title":"Target RCS exploitations in compressive sensing for through wall imaging","authors":"M. Amin, F. Ahmad, Wenji Zhang","doi":"10.1109/WDD.2010.5592412","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592412","url":null,"abstract":"In this paper, target radar cross-section (RCS) is utilized to improve the performance of compressive sensing (CS) when applied to sensing through wall based on RF modality. Using step-frequency SAR imaging, it is shown that the selection of frequencies emitted at each antenna position of the SAR system can benefit from a priori knowledge of the target RCS. Frequencies with high target response allow the CS performance to be more robust to noise and are able to reveal target presence in noisy and cluttered environments.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128521904","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}
{"title":"Radar transmit waveform design for lossy propagation channels","authors":"J. P. Anglin, J. Stiles","doi":"10.1109/WDD.2010.5592385","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592385","url":null,"abstract":"This paper proposes that radar transmit codes can be tailored to a specific target scene through the use of Marginal Fisher Information (MFI). Where peak sidelobe level (PSL) and Total Integrated Sidelobe Level (TISL) are metrics frequently used in determining the quality of radar transmit codes, well performing free-space waveforms with low PSL and TISL may not be optimal for lossy propagation channels. When some knowledge is available regarding the propagation characteristics of the scene, MFI can be used to develop transmit codes with significantly increased estimation accuracy over codes designed to be optimal for free-space cases.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128671200","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}
I. Demirkiran, D. Weiner, B. Himed, A. Drozd, I. Kasperovich
{"title":"A efficient channel utilization to increase in the number of users in multi-user direct-sequence spread spectrum (DSSS) systems","authors":"I. Demirkiran, D. Weiner, B. Himed, A. Drozd, I. Kasperovich","doi":"10.1109/WDD.2010.5592328","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592328","url":null,"abstract":"When the number of these DSSS radios is increased, capacity of the existing wireless system has become an issue. In this paper, a novel approach is presented that provides an efficient channel utilization for a significant increase in the number of DSSS radios for a given channel.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123314244","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}
{"title":"Cognitive radar for target tracking in multipath scenarios","authors":"Phani Chavali, A. Nehorai","doi":"10.1109/WDD.2010.5592379","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592379","url":null,"abstract":"In this paper, we propose a cognitive radar system for target tracking in the presence of multipath reflections. We exploit the inherent spatial diversity offered by the multipath environment by constructing a new measurement vector, which we refer to as a virtual measurement vector. We employ broadband Orthogonal Frequency Division Multiplexing (OFDM) signalling at the transmitter and implement adaptive waveform design by minimizing the posterior Cramér Rao bound (PCRB) on the target state estimates to find the optimal weights to be transmitted on each subcarrier bin of the OFDM signal. We demonstrate with numerical simulations that the mean square error in the case of a cognitive radar is significantly lower than the mean square error in the case of a standard radar.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125760363","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}
C. Baylis, Loria Wang, M. Moldovan, Joshua Martin, H. Miller, L. Cohen, J. de Graaf
{"title":"Designing for spectral conformity: Issues in power amplifier design","authors":"C. Baylis, Loria Wang, M. Moldovan, Joshua Martin, H. Miller, L. Cohen, J. de Graaf","doi":"10.1109/WDD.2010.5592610","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592610","url":null,"abstract":"Spectral constraints placed upon radar systems by regulatory agencies require the design of highly linear amplifiers. Spectral spreading in power amplifiers is a result of transistors operated in the nonlinear regime to optimize efficiency. Several different methods are employed by power amplifier designers to maximize both linearity and efficiency. The methods of predistortion, feedforward, envelope tracking, Doherty, and “Linear Amplification Using Nonlinear Components” (LINC) are discussed in this paper. Tradeoffs and challenges inherent in these design approaches are surveyed.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128802959","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}
{"title":"Waveform-diverse moving-target spotlight SAR","authors":"M. Cheney, B. Borden","doi":"10.1117/12.883310","DOIUrl":"https://doi.org/10.1117/12.883310","url":null,"abstract":"This paper develops the theory for waveform-diverse moving-target synthetic-aperture radar. We assume that the targets are moving linearly, but we allow an arbitrary flight path and (almost) arbitrary waveforms. We consider the monostatic case, in which a single antenna phase center is used for both transmitting and receiving. We include the case of waveforms whose duration is sufficiently long that the targets and/or platform move appreciably while the data is being collected.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130150469","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}
{"title":"Using time reversal of multipath for intra-pulse radar-embedded communications","authors":"S. Blunt, J. Metcalf","doi":"10.1109/WDD.2010.5592403","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592403","url":null,"abstract":"This paper considers the problem of embedding a covert communication waveform into the backscatter from an illuminating radar by an RF tag/transponder within a multipath environment. We propose to exploit the multipath via time reversal, which is ideally suited for backscatter communications. Multipath time reversal induces a spatio-temporal focusing of the embedded communication waveform at the desired receiver while distorting it at all other locations thus further reducing the probability of intercept. Specifically, the paper addresses the case where the radar waveform is known to the tag/transponder thus allowing for estimation of the multipath via coherent processing (i.e. pulse compression). Within the radar-embedded communications context the use of the estimated multipath is compared with the case when no multipath knowledge is employed.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129491074","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}
R. Qiu, Zhen Hu, M. Wicks, S. Hou, Lily Li, J. L. Gary
{"title":"Wireless tomography, Part II: A system engineering approach","authors":"R. Qiu, Zhen Hu, M. Wicks, S. Hou, Lily Li, J. L. Gary","doi":"10.1109/WDD.2010.5592625","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592625","url":null,"abstract":"This is the second paper in a series on a new initiative of wireless tomography. The goal is to combine two areas: wireless communication and radio tomography. This paper studies wireless tomography from a system engineering's point of view. Machine learning and waveform diversity will be applied to wireless tomography. The potential system architecture for wireless tomography will also be given.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115908690","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}
{"title":"Reduced rank detection algorithms for distributed array sensors","authors":"B. Jung, R. Adve, J. Chun","doi":"10.1109/WDD.2010.5592364","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592364","url":null,"abstract":"Distributed sensing systems provide an inherent spatial diversity by viewing a potential target from different aspect angles. Even though the centralized fully adapted processing scheme provides optimum performance, it is impractical for reasons of computational complexity and the sample support required for weight training. This paper presents two decentralized reduced rank STAP algorithms to overcome the drawbacks of centralized fully adapted processing.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122908205","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}
{"title":"All-digital agile frequency generator for Software-Defined Radios part I — Fundamentals","authors":"D. N. Vo, A. Marsolais","doi":"10.1109/WDD.2010.5592355","DOIUrl":"https://doi.org/10.1109/WDD.2010.5592355","url":null,"abstract":"This paper presents an all-digital frequency generating scheme suitable for Software-Defined-Radios (SDR). It performs feed-forward frequency estimation, followed by feed-back phase-locked loop tracking. The proposed DPLL scheme is a feature rich novel technique which will enable many new applications. The paper describes the fundamental equations of the technique, depicts its limitations, and proposes a method to control. A companion paper will treat performance and implementation.","PeriodicalId":112343,"journal":{"name":"2010 International Waveform Diversity and Design Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114862084","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}