IEEE International Radar Conference, 2005.最新文献_第6页

Suppression of grating lobes in stepped-frequency train 步进频率序列中光栅瓣的抑制

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435853

I. Gladkova, D. Chebanov

引用次数: 32

The impact of TACCAR on STAP algorithm convergence TACCAR对STAP算法收敛性的影响

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435866

R.M. Cooper

{"title":"The impact of TACCAR on STAP algorithm convergence","authors":"R.M. Cooper","doi":"10.1109/RADAR.2005.1435866","DOIUrl":"https://doi.org/10.1109/RADAR.2005.1435866","url":null,"abstract":"In an airborne radar, clutter returns from stationary objects undergo a phase shift due to the relative motion of the airborne platform. For a low PRF radar, this phase shift can place the main beam clutter return at virtually any frequency within the clutter Doppler spectrum. Typically, a phase shift or frequency shift is applied to these returns in order to place them in the 0 Hz Doppler filter within the radar signal processor. This phase or frequency shift can be applied either on transmit or receive, and is commonly called the TACCAR shift. The term TACCAR is an acronym for time averaged clutter coherent airborne radar, and the implication of this term is that an average of pulse-to-pulse clutter phase in a coherent radar results in a measure of the main lobe Doppler frequency. In a PRI staggered STAP radar, this TACCAR shift may no longer be necessary, since the STAP solution places the null in the Doppler passband as appropriate to optimize clutter cancellation. However, given that an airborne radar usually has size and weight constraints that can result in limited on-board processing resources, a TACCAR shift may result in fewer processing operations needed to converge on a STAP solution. If this potential processing savings applies, then a TACCAR shift would still be desirable.","PeriodicalId":444253,"journal":{"name":"IEEE International Radar Conference, 2005.","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121454938","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: 5

A common basis for analytical clutter representations 分析杂波表示的公共基础

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435852

J. Gray

{"title":"A common basis for analytical clutter representations","authors":"J. Gray","doi":"10.1109/RADAR.2005.1435852","DOIUrl":"https://doi.org/10.1109/RADAR.2005.1435852","url":null,"abstract":"In order to understand the problems intractable problems nature presents us, we are forced to make simplifications till we arrive at simple analytical models that we are capable of understanding. Such canonical models are rare, but useful as tools for constructing more realistic models that we can use analyze nature. The class of analytical models for clutter analysis limited to those that consist of various amplitude models with the phase noise assumed to have a probability density function that is uniformly distributed. These analytical models can be extended by relaxing the assumption of uniform phase noise to phase noise with non-uniform distributions. It is shown how to determine the probability density function for these non-uniform distributions in general and then the method is illustrated with such distributions as Gaussian, Laplacian, and Chi-squared. This enables one to determine the probability density functions of the individual components of clutter model such as x/sub t/ = v/sub t/ cos(/spl Phi//sub c/). Using the rule for determining the products of distributions, we show that the functional form for x/sub t/ is reduced to evaluating integrals that reduce to elliptical functions. Once the functional form has been determined, it is easy to determine the moments of the PDF and hence completely characterize its statistics.","PeriodicalId":444253,"journal":{"name":"IEEE International Radar Conference, 2005.","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128475598","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

Airport based bias estimation of surface movement radars 基于机场的地面运动雷达偏差估计

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435958

A. Jaramillo, J. Portas, G. de Miguel Vela, J. Corredera

引用次数: 3

Ground tracking using a variable structure multiple model particle filter with varying number of particles 地面跟踪采用变结构多模型变粒子数粒子滤波器

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435943

G. Kravaritis, B. Mulgrew

引用次数: 8

Scattering centers association and radar imaging based on multi-aspect measures 散射中心关联与多尺度雷达成像

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435930

L. Yongxiang, L. Xiang, Zhu Zhaowen

引用次数: 3

Pre-filtering for clutter rejection in beamspace STAP 在波束空间 STAP 中进行预滤波以抑制杂波

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435918

M. Khanpour-Ardestani, R. Adve, M. Wicks

引用次数: 1

Performance improvement using interpulse pattern diversity with space-time adaptive processing 利用脉冲间模式分集和时空自适应处理改进性能

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435793

P. Corbell, M. Temple, T. Hale, W. Baker, M. Rangaswamy

引用次数: 6

Refined method for terrain scattered interference mitigation 地形散射干扰抑制的改进方法

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435820

A. Nelander, S. Bjorklund

{"title":"Refined method for terrain scattered interference mitigation","authors":"A. Nelander, S. Bjorklund","doi":"10.1109/RADAR.2005.1435820","DOIUrl":"https://doi.org/10.1109/RADAR.2005.1435820","url":null,"abstract":"Terrain scattered interference mitigation methods for airborne radar have been described in previous papers and deconvolution methods for interference suppression have been proposed. This paper describes a refined method for terrain scattered interference mitigation and investigates performance for different conditions and limitations. An important part of the method is a threshold function to enable least squares estimation of the multipath impulse response. Least squares estimation can be applied if the impulse response is time limited or if a limited number of impulse response coefficients are required for sufficient interference suppression. The impulse response estimation can be performed either before or within the coherent processing interval. It is assumed that the direct path signal can be accurately estimated without strong multipath errors. Small relative Doppler shift errors are required between the direct path and the terrain scattered paths. Several strong jamming signal sources cannot be resolved and suppressed. Receiver blocking gives errors in the impulse response estimate and jamming signal residues in the main beam signal. Clutter signals might have to be suppressed to get accurate impulse response estimates. Bandwidth effects must be considered to get numerical stability in the inverse filtering and deconvolution operations. The refined method can suppress interference down to the receiver noise level in simple terrain scattering scenarios.","PeriodicalId":444253,"journal":{"name":"IEEE International Radar Conference, 2005.","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126711691","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

Airborne radar measurements of the reentry of the Ariane 5 EPC 阿丽亚娜5型再入大气层的机载雷达测量

IEEE International Radar Conference, 2005. Pub Date : 2005-05-09 DOI: 10.1109/RADAR.2005.1435871

Rubin G, T. Carney, J. Floyd, H. Henderson, J. Mitchell, A. Siegel, J. Vila

引用次数: 0