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2006 International Waveform Diversity & Design Conference最新文献

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Analysis of standoff spectral data using discrete wavelet transforms 用离散小波变换分析对峙光谱数据
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321426
D. Emge, Joel M. Morris
{"title":"Analysis of standoff spectral data using discrete wavelet transforms","authors":"D. Emge, Joel M. Morris","doi":"10.1109/WDD.2006.8321426","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321426","url":null,"abstract":"The use of discrete wavelet transforms (DWT) for data compression and feature extraction is an area of active research. The particular focus of this work is the application of the DWT to extract relevant features from standoff spectral data. Through the examination of data sets collected under controlled laboratory conditions the necessary sensitivity of these techniques is shown. Moreover the detection of specific chemical species from representative operational data is examined and the results are presented.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","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":"129525097","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 Albano passive UHF RFID tag antenna Albano无源超高频RFID标签天线
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321496
A. Delichatsios, D. Engels
{"title":"The Albano passive UHF RFID tag antenna","authors":"A. Delichatsios, D. Engels","doi":"10.1109/WDD.2006.8321496","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321496","url":null,"abstract":"We present the novel “Albano” radio frequency identification (RFID) tag antenna design. Current two-dimensional tag antennas are orientation-sensitive, restricting RFID efficiency in warehouses and other RFID environments. The three-dimensional Albano tag however, radiates equally in all directions without complicating the tag labeling process. Designs of the Albano tag were simulated and optimized using Ansoft's High Frequency Structure Simulator (HFSS). Physical prototypes of the Albano tag were attached to air-filled boxes and tested statically to measure maximum read ranges in multiple orientations. The performance of the novel tag was measured and compared to the performance of Alien Technology's planar “I” and “Squiggle” tags. Testing showed that while the Alien tags perform extremely well in some orientations and very poorly in others, the Albano tag has a consistent maximum read range, 2–3 meters, in every direction, eliminating the orientation sensitivity experienced by planar antenna designs.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","volume":"66 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":"128518687","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
A carrier synchronization technique using time-domain channel estimate for OFDM systems 基于时域信道估计的OFDM系统载波同步技术
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321407
Hao Zhou, A. Malipatil, Yih-Fang Huang
{"title":"A carrier synchronization technique using time-domain channel estimate for OFDM systems","authors":"Hao Zhou, A. Malipatil, Yih-Fang Huang","doi":"10.1109/WDD.2006.8321407","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321407","url":null,"abstract":"This paper presents maximum-likelihood estimators (MLEs) for carrier frequency offset (CFO) using frequency-domain and time-domain channel estimates. Cramer-Rao lower bounds (CRLBs) are derived and examined for the cases of same and different successive OFDM symbols. Furthermore, the MLE for the CFO, obtained using time-domain channel estimates, has high accuracy and features significantly reduced complexity, compared to conventional approaches.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","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":"126337316","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
Sparse-spectrum receiver processing for position-adaptive radar in urban environments 城市环境下位置自适应雷达的稀疏频谱接收机处理
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321495
A. Mitra, S. Pilukaitis, C. Prosser, N. Colon-Diaz, J. Caldwell, D. Janning, K. Coss, J. Mudd
{"title":"Sparse-spectrum receiver processing for position-adaptive radar in urban environments","authors":"A. Mitra, S. Pilukaitis, C. Prosser, N. Colon-Diaz, J. Caldwell, D. Janning, K. Coss, J. Mudd","doi":"10.1109/WDD.2006.8321495","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321495","url":null,"abstract":"This paper discusses results from a hardware simulation and instrumentation system development effort that led to a series of tests pertaining to positive-adaptive radar concepts in outdoor urban environments. The focus of the investigation and subsequent discussion in this paper is on the development of “sparse spectrum” intelligent processing waveforms developed specifically for detecting moving vehicles that are embedded between two buildings.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","volume":"81 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":"126402079","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
Track-before-detect procedures in multi-targets environments 多目标环境中的检测前跟踪程序
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321503
S. Buzzi, M. Lops, L. Venturino
{"title":"Track-before-detect procedures in multi-targets environments","authors":"S. Buzzi, M. Lops, L. Venturino","doi":"10.1109/WDD.2006.8321503","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321503","url":null,"abstract":"In this paper, track-before-detect (TBD) procedures for radar systems are presented and discussed. After introducing the signal model we rely on, the non-Bayesian approach developed in [2,3] with reference to a single-target scenario is extended to multiple targets and an optimum (for discretized statistics) TBD algorithm is derived. Interestingly, this algorithm admits a Viterbi-like implementation with a complexity linear in the number of integrated frames, as in the single-target case; however, the number of states to be considered in the trellis-diagram now grows exponentially with the number of targets. Successively, two sub-optimum TBD procedures are investigated, which allow to trade better estimation and tracking accuracy for lower implementation complexity. Finally, numerical examples are provided to assess and compare the performance of the proposed TBD algorithms.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","volume":"2 5 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":"129406577","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: 14
Effects of different waveform interference sources on radar system performance 不同波形干扰源对雷达系统性能的影响
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321449
S. Harman, M. C. Sharman
{"title":"Effects of different waveform interference sources on radar system performance","authors":"S. Harman, M. C. Sharman","doi":"10.1109/WDD.2006.8321449","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321449","url":null,"abstract":"This paper investigates aspects of radar performance in the presence of different classes of interference from radar and communication systems. Methods for reducing the interference effects on radar systems are also included within this paper. It is found that the majority of interfering signals can be considered as band limited white noise once passed through the radar's sub-systems. Various modifiers are presented that are applied to interfering signals to allow this representation. Thereby this study has produced “rules of thumb” for deploying radar systems, which provide an estimation of the likely effects of placing different systems within close proximity to radars.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","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":"130734811","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
A design and implementation of control logic of beam steering unit for phased array radar 相控阵雷达波束转向单元控制逻辑的设计与实现
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321409
D. G. Rao, Yogesh Shakya, Angela Nalini Margaret, Abhishek Kothari
{"title":"A design and implementation of control logic of beam steering unit for phased array radar","authors":"D. G. Rao, Yogesh Shakya, Angela Nalini Margaret, Abhishek Kothari","doi":"10.1109/WDD.2006.8321409","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321409","url":null,"abstract":"Beam steering unit (BSU) is responsible for steering of the beam in Phased Array Radar [3] based on beam parameters it will shift the beam from one position to other position as directed by the radar Controller. The control logic of the unit is modelled in MATLAB, Simulated in Simulink and implemented in Hardware description language. The architecture of BSU consists of Single Board Computer (SBC) and an indigenously developed Array Interface Card (AIC). SBC will receive the beam Parameter from Radar Controller and calculates the Phase gradients and phase commands based on the different tables like standard table, collimation table, and Phase command table. The AIC is having a control logic, which is residing in an FPGA [18]. The AIC will interact with the SBC for receiving the phase command, Row number and column number of the phase shifters in the phased array. The control logic will decode the data into suitable format and converts into serial format for loading the data into phase shifters. The data will be loaded serially in each sector and parallel in other sectors of the antenna. With this design method the loading time achieved is 2.2msec. This unit can be used for different phased arrays [3] with varying antenna dimensions.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","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":"130938644","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
Improved space-time coding for multiple antenna multicasting 改进的多天线组播空时编码
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1049/SBRA023E_CH30
Jianqi Wang, D. Love, M. Zoltowski
{"title":"Improved space-time coding for multiple antenna multicasting","authors":"Jianqi Wang, D. Love, M. Zoltowski","doi":"10.1049/SBRA023E_CH30","DOIUrl":"https://doi.org/10.1049/SBRA023E_CH30","url":null,"abstract":"Multicasting is the general method of conveying the same information to multiple users. For multicasting applications over multiple-input multiple-output (MIMO) channels, it is of great importance to ensure that all users experience an adequate level of performance while utilizing the transmit diversity available in MIMO channels. One technique, called max-min beamforming, provides a way to increase the received signal-to-noise ratio (SNR) of the worst-case user. However, due to its limited degrees of freedom, this method suffers severe performance degradation when the number of users increases. Alternatively, space-time codes can be employed to transmit data simultaneously to all users. By introducing additional degrees of freedom in the time domain, open-loop orthogonal space-time block coding (OSTBC) schemes achieve better performance than max-min beamforming when the number of users is large. In this paper, a precoded OSTBC scheme is proposed that optimizes the performance of the worst-case user. By pre-multiplying the OSTBC codeword by a precoding matrix, the transmitter can adapt to current channel conditions which results in a higher worst-case receive SNR. Simulation results demonstrate that the proposed scheme performs universally better than open-loop OSTBC schemes and outperforms the max-min beamforming scheme for a large number of users.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","volume":"134 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":"116348197","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: 24
A waveform design technique for range and Doppler ambiguity mitigation 一种用于距离和多普勒模糊缓解的波形设计技术
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321507
H. Mendelson, W. Ogle
{"title":"A waveform design technique for range and Doppler ambiguity mitigation","authors":"H. Mendelson, W. Ogle","doi":"10.1109/WDD.2006.8321507","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321507","url":null,"abstract":"Space Based Radars (SBR) have been considered for a number of civilian and military missions. Most recently, SBR concepts are being developed to have the platform operate in multiple modes, i.e., as a synthetic aperture radar (SAR) and as a moving target indication (MTI) radar for both slow surface moving targets (SMTI) and fast moving airborne targets (AMTI). This set of requirements can be dealt with by a properly designed antenna. Launch vehicle considerations, however, may impose restrictions on the size of the antenna needed to perform the mission requirements. Due to the collection geometries involved, there may be instances where these restrictions will result in degradation of the radar product due to either range or Doppler ambiguities. In order to overcome these difficulties, transmit waveform diversity can be used to pre-condition the waveform to counter this problem. An approach has been developed that considers a combination of techniques, using both inter- and intrapulse modulation, orthogonal waveforms, non-traditional pulse compression and a priori knowledge of the collection geometry to enhance both SAR and MTI performance.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","volume":"48 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":"123999363","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
Analysis of target-matched-filter diversity over extended dwells for the detection of dismounts 目标匹配滤波器分集分析用于脱模检测
2006 International Waveform Diversity & Design Conference Pub Date : 1900-01-01 DOI: 10.1109/WDD.2006.8321427
R. Hersey, W. Melvin, E. Culpepper
{"title":"Analysis of target-matched-filter diversity over extended dwells for the detection of dismounts","authors":"R. Hersey, W. Melvin, E. Culpepper","doi":"10.1109/WDD.2006.8321427","DOIUrl":"https://doi.org/10.1109/WDD.2006.8321427","url":null,"abstract":"Future advanced radar systems must detect targets of diminishing radar cross section (RCS) at low radial velocity, including the detection of dismounts. Presently, a deficiency in radar detection performance exists between the capabilities of synthetic aperture radar (SAR) for fixed target indication and space-time adaptive processing (STAP) for ground moving target indication (GMTI) of vehicles with low ground track velocity. In this paper, we develop a model for STAP processing over extended dwells and apply this model to analyze the inherent diversity of targets with varying velocities and accelerations. This diversity shows potential for new matched filtering techniques leading to better slow-moving, low-RCS target detection.","PeriodicalId":339522,"journal":{"name":"2006 International Waveform Diversity & Design Conference","volume":"49 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":"128362993","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
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