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

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Waveform design for compressive radar sensing 压缩雷达感知的波形设计
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311301
Emre Ertin
{"title":"Waveform design for compressive radar sensing","authors":"Emre Ertin","doi":"10.1109/WDD.2012.7311301","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311301","url":null,"abstract":"Wideband multi-frequency chirp waveforms combined with stretch processing on receive provides a way to obtain linear projection of range profiles at sub-Nyquist sampling rates. Stable recovery of high resolution range profiles from these projections is guaranteed only if the mutual coherence between the columns of the sensing matrix is sufficiently small. In this note, we derive the sensing matrix for the compressive radar sensor with multi-frequency chirp waveforms and analyze its coherence structure. We show that for suitable choice of system parameters the inter-column coherence of unstructured random sensing matrices is achieved.","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":"129719572","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
Cognitive radio network as sensors: Low signal-to-noise ratio collaborative spectrum sensing 认知无线网络传感器:低信噪比协同频谱感知
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311279
Feng Lin, R. Qiu, Zhen Hu, S. Hou, Lily Li, J. Browning, M. Wicks
{"title":"Cognitive radio network as sensors: Low signal-to-noise ratio collaborative spectrum sensing","authors":"Feng Lin, R. Qiu, Zhen Hu, S. Hou, Lily Li, J. Browning, M. Wicks","doi":"10.1109/WDD.2012.7311279","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311279","url":null,"abstract":"This paper propose a function of covariance matrix based spectrum sensing approach for cognitive radio systems. The statistical covariance of signal and noise are usually different, so a binary hypothesis test on covariance matrix is employed to determine the existence of primary user. Collaborative sensing scenario is introduced for the proposed algorithm, in which each sensor only needs limited sample data for calculation and sends mediate result to fusion center. A performance comparison among different rational functions is provided, which shows different functions in this algorithm may have similar or distinct performance. So it is important to choose an appropriate function. The proposed algorithm has a reliable performance in very low signal-to-noise ratio (SNR) condition, and outperforms the Estimator-Correlator (EC) approach.","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":"130604662","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: 10
Cognitive SAR based on waveform design and optimum 基于波形设计与优化的认知SAR
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311262
Wang Kaizhi, Liu Xingzhao
{"title":"Cognitive SAR based on waveform design and optimum","authors":"Wang Kaizhi, Liu Xingzhao","doi":"10.1109/WDD.2012.7311262","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311262","url":null,"abstract":"Different from traditional SAR system, the cognitive SAR proposed in this paper transmits various waveforms to the illuminated scene. The waveforms are designed offline based on the property of clutter and targets of interested. These waveforms are selected and optimized online by priori knowledge and the backscattered signal. The cognitive ability of SAR system can be gained by the matching illumination to the target and scene adaptively.","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":"132334244","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
Doppler tolerant time separated Golay waveforms 多普勒容忍时间分离Golay波形
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311281
Richard C. Chen, T. Higgins
{"title":"Doppler tolerant time separated Golay waveforms","authors":"Richard C. Chen, T. Higgins","doi":"10.1109/WDD.2012.7311281","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311281","url":null,"abstract":"A radar transmission and processing scheme is developed which yields range profile estimates with target mainlobes which are as narrow as possible and sidelobe levels which are low. Specifically, Golay waveforms are implemented via time separated waveform transmission and the Re-Iterative Super Resolution (RISR) algorithm [9]. Doppler tolerance is achieved by using Golay quads in addition to Doppler bin specific fast-time Doppler compensation. The four waveforms of the Golay quad are transmitted in four sequential bursts at a fixed pulse repetition interval. The RISR algorithm is used to separate the received signal into discrete Doppler bins. The separated signal components are then compensated appropriately so that the Golay complementarity property can be exploited. The time separated Golay transmission and processing scheme is illustrated with simple simulation examples.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"71 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":"127121070","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
An adaptive SAR imaging algorithm 一种自适应SAR成像算法
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311310
Yesheng Gao, Kaizhi Wang, Xingzhao Liu
{"title":"An adaptive SAR imaging algorithm","authors":"Yesheng Gao, Kaizhi Wang, Xingzhao Liu","doi":"10.1109/WDD.2012.7311310","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311310","url":null,"abstract":"An adaptive SAR imaging algorithm is proposed in this paper. Assume that the received radar data is echoes from isolated point targets, a signal model is constructed. The parameters of the signal model are estimated, and can be used to characterize a single scatterer. Then the estimated parameter space can be mapped to form SAR image. Simulation experiment is used to validate the algorithm.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"85 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":"115242551","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
Range estimation of continuous transmission FM (CTFM) sonar for a fast moving target 快速运动目标连续传输调频声纳的距离估计
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311303
Chunsheng Liu, M. Trevorrow
{"title":"Range estimation of continuous transmission FM (CTFM) sonar for a fast moving target","authors":"Chunsheng Liu, M. Trevorrow","doi":"10.1109/WDD.2012.7311303","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311303","url":null,"abstract":"This paper proposes an extension of the CTFM approach to estimate range and velocity for a fast moving target. Traditional CTFM processing assumes a stationary or slow moving target. However, for a fast moving target, the Doppler shift creates distortions in the estimated range. We propose a method whereby multiple Doppler shift channels are applied and then we look for minimal variance across all Doppler channels. Also a direct path signal elimination algorithm is proposed.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"194 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":"114433711","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
Cognitive design of the transmitted phase code and receive filter in reverberating environment 混响环境下发射相位码和接收滤波器的认知设计
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311299
A. Aubry, A. De Maio, M. Piezzo, A. Farina, M. Wicks
{"title":"Cognitive design of the transmitted phase code and receive filter in reverberating environment","authors":"A. Aubry, A. De Maio, M. Piezzo, A. Farina, M. Wicks","doi":"10.1109/WDD.2012.7311299","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311299","url":null,"abstract":"In this paper, we consider the problem of knowledge-aided transmit signal and receive filter design for a point-like target embedded in a high reverberating signal-dependent environment. We focus on phase-only waveforms and devise a constrained optimization procedure which sequentially improves the Signal to Interference plus Noise Ratio (SINR), forcing a similarity constraint between the transmitted signal and a known radar waveform sharing a good ambiguity function. The computational complexity of the proposed algorithm is linear with the number of iterations and polynomial with the receive filter length. At the analysis stage, the performances of the technique are assessed in the presence of a homogeneous clutter scenario.","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":"122177409","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
MI-based analysis of waveform detection performance 基于mi的波形检测性能分析
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311317
Hui Sheng, Kaizhi Wang, Xingzhao Liu
{"title":"MI-based analysis of waveform detection performance","authors":"Hui Sheng, Kaizhi Wang, Xingzhao Liu","doi":"10.1109/WDD.2012.7311317","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311317","url":null,"abstract":"A theory aims at analyzing the detection performance for certain waveform is presented in this paper. We consider mutual information (MI) as measurement to find the matched target which can optimize the radar detection performance. When mutual information between the received signal and the stochastic extended target under the interference from additive noise arrives at its maximization, it is believed that radar detection performance steps into the optimal state. In this paper, we utilize the spectral variation of target as an expression to describe the target's characteristics under the optimal state.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"17 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":"117065669","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 holographic reconstruction method for circular multistatic subsurface radar 圆形多基地地下雷达全息重建方法
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311268
D. Flores-Tapia, O. Maizlish, C. Alabaster, S. Pistorius
{"title":"A holographic reconstruction method for circular multistatic subsurface radar","authors":"D. Flores-Tapia, O. Maizlish, C. Alabaster, S. Pistorius","doi":"10.1109/WDD.2012.7311268","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311268","url":null,"abstract":"In recent years, the use of Subsurface Radar (SR) has been proposed for some emerging applications such as breast imaging and wood inspection. A circular scan geometry is usually used in these applications to better suit the morphology of the scan region. Nevertheless, the reconstruction of these kind of datasets is a non-trivial task due to the nature of the phase wrappings introduced by the scan geometry and the near field distances between the antenna and the targets. In this paper, a novel reconstruction algorithm for multistatic SR datasets recorded along cylindrical scan geometries is proposed. This image formation approach performs a series of operations in the frequency domain to compensate the effects of the scan geometry. The performance of the proposed method was evaluated using a series of simulated datasets. Compared with its monostatic counterpart, the proposed reconstruction algorithm generated images with a higher signal to noise ratio, spatial accuracy and focal quality.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"10 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":"121466161","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
New alternatives for interference tolerant waveforms hosted on a software programmable multi-mission platform 基于软件可编程多任务平台的干扰容忍波形的新替代方案
2012 International Waveform Diversity & Design Conference (WDD) Pub Date : 1900-01-01 DOI: 10.1109/WDD.2012.7311287
E. Beadle, A. J. Micheals, J. Schroeder
{"title":"New alternatives for interference tolerant waveforms hosted on a software programmable multi-mission platform","authors":"E. Beadle, A. J. Micheals, J. Schroeder","doi":"10.1109/WDD.2012.7311287","DOIUrl":"https://doi.org/10.1109/WDD.2012.7311287","url":null,"abstract":"We present a dynamically reconfigurable (~ seconds) combined FPGA/DSP-based system-on-chip platform to address the need for an agile multi-function/multi-mission capability in size and weight constrained applications. The highly integrated system-in-a-package (SiP) format occupies <; 2 cu inch and has been demonstrated as a key element in both MODEM and RADAR platforms. Dynamic reconfiguration is achieved via software, thus implementing a software defined payload (SDP). MODEM operation is illustrated with two novel interference resistant communication waveforms, one digital chaotic-based and the other an enhanced OFDM (eOFDM). In trials, chaotic spreading achieved interference resistance of ~ 2.5 dB over comparable direct-sequence spread spectrum approaches with an uncoded BER of 8.5 × 10-6 when received at -13 dB SNR (100 kbps). Results indicate that this waveform holds promise as a concurrent secondary user (SU) in cognitive radio or shared spectrum schemes. The eOFDM provides > 36 Mbps and > 30 dB of additional pilot tone interference margin over typical OFDM, so it is suitable as a primary user (PU) format tolerant to both interference and wireless channel distortions. Lastly, to show the mission diversity, the FPGA platform is extended to a stretch mode inverse synthetic aperture RADAR (ISAR) experimentally achieving 0.25 m slant range resolution and multiplicative noise ratio (MNR) of -23 dB using a 40 MHz/us chirp on an actual target.","PeriodicalId":102625,"journal":{"name":"2012 International Waveform Diversity & Design Conference (WDD)","volume":"47 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":"121558415","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
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