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

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Array architecture for wideband transmit nulling 宽带发射归零的阵列结构
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311261
P. Vouras, J. de Graaf
{"title":"Array architecture for wideband transmit nulling","authors":"P. Vouras, J. de Graaf","doi":"10.1109/WDD.2012.7311261","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311261","url":null,"abstract":"The ability to create nulls in the transmit pattern of a phased array antenna has many applications for communication and radar systems, including interference and clutter mitigation. Most nulling techniques introduce small perturbations in amplitude and phase, or phase-only, at each element of the phased array. For ease of implementation, phase-only perturbations are usually desired and provide acceptable null depths. However, the phase shift at each array element will vary with the frequency of the transmitted signal. As a result, the depth and pointing accuracy of the transmit null will not be uniform over the bandwidth of the transmitted signal. A more robust transmit nulling approach is to insert a tapped delay line (TDL) behind each array element instead of a phase shift. As shown in this paper, the null depths achieved over wide signal bandwidths are far superior to conventional phase-only approaches.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"8 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":"116162150","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
Ambiguity function for multistatic radar systems with orthogonal frequency waveforms 正交频率波形多基地雷达系统的模糊函数
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311315
Lei Pengzheng, Huang Xiaotao
{"title":"Ambiguity function for multistatic radar systems with orthogonal frequency waveforms","authors":"Lei Pengzheng, Huang Xiaotao","doi":"10.1109/WDD.2012.7311315","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311315","url":null,"abstract":"Considering frequency diversity, we study different multistatic radar system geometries with multiple transmitters and multiple receivers in order to shape the multistatic ambiguity function in this paper. The multistatic radar system geometries and frequency diversity are shown to play an important role in evaluating radar performance. The simulation results illustrate that using orthogonal frequency waveforms, the multistatic radar system not only could minimize the interference from one waveform to the other, but also achieve better resolution.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"9 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":"124655341","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
STAP radar system using FPGA floating point processing STAP雷达系统采用FPGA进行浮点处理
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311289
Michael Parker
{"title":"STAP radar system using FPGA floating point processing","authors":"Michael Parker","doi":"10.1109/WDD.2012.7311289","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311289","url":null,"abstract":"One of the earliest applications of DSP (digital signal processing) has been in radar systems. DSP enabled target discrimination using both velocity and range in pulse-Doppler radar. DSP has also been the key technology behind EASA, SAR radar and more recently STAP radar processing.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"41 12 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":"130046492","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
Trading spectral efficiency for system latency in true-random noise radar network through template-replay diversity 基于模板重放分集的真随机噪声雷达网络中频谱效率与系统延迟的权衡
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311256
P. Collins, John A. Priestly
{"title":"Trading spectral efficiency for system latency in true-random noise radar network through template-replay diversity","authors":"P. Collins, John A. Priestly","doi":"10.1109/WDD.2012.7311256","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311256","url":null,"abstract":"The Air Force Institute of Technology (AFIT) has developed an experimental multistatic ultrawideband noise radar network (NoNET) to produce highly accurate, highly resolved imagery of a target scene while maintaining a featureless waveform for efficient spectrum utilization. In this work we present the results of an experimental study to assess the effectiveness of a template replay strategy to mitigate the effects of network latency in the radar network while preserving the Low Probability of Intercept (LPI) nature of the random noise (RN) waveform. Based on laboratory prototype measurements and a MATLAB model of two representative play-back schemes we demonstrate up to a 75% increase in processing efficiency while maintaining the ability to operate in a frequency contested environment.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"65 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":"133132809","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
Configurable clutter models for radar simulation 雷达仿真的可配置杂波模型
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311313
Joseph Jezak, G. Gadola, C. Berdanier, S. Levitan, D. Chiarulli
{"title":"Configurable clutter models for radar simulation","authors":"Joseph Jezak, G. Gadola, C. Berdanier, S. Levitan, D. Chiarulli","doi":"10.1109/WDD.2012.7311313","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311313","url":null,"abstract":"In this paper we describe an extension to the MATLAB Phased Array Toolkit that adds a configurable clutter object to model clutter signals returned along a specified signal path. The clutter model is based on the Simkins Unified Clutter Model[1]. The current implementation supports sea clutter in any of five sea states with configurable polarization, grazing angle, and beam width. We describe the implementation and give examples of modeled clutter returns.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"35 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":"121904106","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
Experimental validation of sparse-frequency waveforms for congested spectrums 拥挤频谱中稀疏频率波形的实验验证
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311264
Shaun W. Frost, B. Rigling, L. Patton, L. Monte, B. Himed
{"title":"Experimental validation of sparse-frequency waveforms for congested spectrums","authors":"Shaun W. Frost, B. Rigling, L. Patton, L. Monte, B. Himed","doi":"10.1109/WDD.2012.7311264","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311264","url":null,"abstract":"With more users populating the frequency spectrum and less available contiguous bandwidth, radar and communication waveforms are slowly forced to become more efficient at using their available frequencies. As waveform designs become more exotic, it is critical that future sparse-frequency methods also consider constraints imposed by amplifiers, such as modulus and phase restrictions. In this paper, three sparse-frequency waveform designs are compared. Experimental results are shown and validated against simulated data.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"4 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":"128281606","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
GAUSS: The GTRI airborne unmanned sensor system GTRI机载无人传感器系统
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311320
S. Marple
{"title":"GAUSS: The GTRI airborne unmanned sensor system","authors":"S. Marple","doi":"10.1109/WDD.2012.7311320","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311320","url":null,"abstract":"Georgia Tech Research Institute is developing under IRAD funds a small unmanned aircraft system (SUAS) testbed for advanced RF sensor data collection and post-collection algorithm evaluation and fusion of multi-INT ISR sensor suites. The GAUSS testbed is reconfigurable to test STAP algorithms, multistatic and MIMO operation among multiple flying SUAS platforms, interferometric applications of crossplatform coherence, waveform diversity modulations other than traditional radar modulations, software agile radar, and sensor fusion. The initial configuration of GAUSS consists of an 8-phase-center (8 channels) X-band GMTI radar, a SIGINT DF system, and a gimbaled stabilized camera ball. The eight phase centers can be driven by independent digital 1 Gsps arbitrary waveform generators for true waveform diversity programming. This presentation will present the capabilities of GAUSS and future plans for collaborative missions in the ISR community.","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":"130419262","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 waveform diversity approach to mitigating ionosphere scintillation effects on wideband space radars 缓解宽频带空间雷达电离层闪烁效应的波形分集方法
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311308
Edward Jones, Beth A. Jones, Robert J. Denton, Mark D. Barnell
{"title":"A waveform diversity approach to mitigating ionosphere scintillation effects on wideband space radars","authors":"Edward Jones, Beth A. Jones, Robert J. Denton, Mark D. Barnell","doi":"10.1109/WDD.2012.7311308","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311308","url":null,"abstract":"The results of a detailed study are presented which analyzed the impact of ionosphere plasma irregularities on wideband waveforms for low frequency space radar systems. The primary objective of this effort was to develop a systems engineering approach using waveform diversity to overcome the impact that the ionosphere has on the performance of a wideband waveform as it passes through the ionosphere. A secondary objective was to advance the physical understanding of mid- to low-latitude ionosphere plasmas at all local times, with special emphasis on post-sunset, as a basis for real-time determination of the impact of the ionosphere on VHF/UHF and L/S-Band space radar systems. Empirical data was collected over a three year period at multiple locations, including the Ronald Reagan Ballistic Missile Defense Test Site, Kwajalein Atoll, Marshall Islands. Radar targets included orbiting calibration spheres (at 900 km). For the first time, based on empirical data, the impact of the ionosphere on VHF/UHF and L/S-Band Space Radar as a function of time of day, time of year, frequency, and recurrent period was determined. For example, moderate ionosphere scintillation with a total electron content unit (TECU) of 25 resulted in a range error for UHF of about nine meters, and for L-Band four meters, and a variation in target RCS of +/-5 dB for UHF and +/- 1 dB for L-Band. These results are being used to develop ionosphere mitigation algorithms and perform validated system design trade studies for a sun-synchronous, wide area change detection space radar.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"89 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":"127960721","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
Game theoretic approach for polarimetric MIMO radar waveform design 极化MIMO雷达波形设计的博弈论方法
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311294
S. Gogineni, A. Nehorai
{"title":"Game theoretic approach for polarimetric MIMO radar waveform design","authors":"S. Gogineni, A. Nehorai","doi":"10.1109/WDD.2012.7311294","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311294","url":null,"abstract":"Polarimetric radar systems allow the flexibility of transmitting arbitrarily polarized waveforms that match the scattering profiles of the target. Since different types of targets have varying profiles, the advantages of a polarimetric radar system can fully be exploited only when the type of target is accurately estimated. However, accurate estimation requires a significant amount of training data, which can be expensive. We propose a polarimetric design scheme for distributed Multiple Input Multiple Output (MIMO) radar target detection. We formulate the selection of transmit polarizations using a game theoretic framework by examining the impact of all possible transmit schemes on the detection performance with different available target profiles. This approach does not require training data, and we show a significant performance improvement due to the polarimetric design.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"35 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":"128875363","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
Optimal waveform design for range-Doppler processing in colored noise 彩色噪声下距离-多普勒处理的最佳波形设计
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311306
L. Patton, Christine Bryant, B. Himed
{"title":"Optimal waveform design for range-Doppler processing in colored noise","authors":"L. Patton, Christine Bryant, B. Himed","doi":"10.1109/WDD.2012.7311306","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311306","url":null,"abstract":"The problem of radar waveform design for moving target detection in the presence of radio frequency interference (RFI) is considered. The transmit waveform is assumed to be a coherent train of uniform pulses, and the RFI is modeled as a wide-sense stationary random process with a known power spectral density. Both pulse-Doppler processing and matched filter bank processing are considered. For each case, it is shown that a constant modulus pulse can be found that locally maximizes the signal-to-noise ratio while respecting user-specified ambiguity function constraints. It is also shown that under certain conditions approximations can be made that result in identical waveform design problems for both processing schemes. The modulus and ambiguity function constraints render the waveform design problem analytically intractable, but numeric techniques can be employed. Simulation results are provided to demonstrate the efficacy of the approach.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"9 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":"125617811","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
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