Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060305
F. Zheng, Mei Chen
Continuous affordability is a new demand for space applications, therefore, some new kinds of lightweight large deployable mesh reflectors are frequently used in recent years. Here we make system design and simulation of a new kind of space large deployable reflector antenna that we proposed recently. System design shows its several superior outstanding advantages. Simulations of deploying ability, surface precision, and antenna performance, all reveal that such kind of deployable antenna has potential foreground in future space applications.
{"title":"System design and simulation of a new space large deployable antenna","authors":"F. Zheng, Mei Chen","doi":"10.1109/RADAR.2014.7060305","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060305","url":null,"abstract":"Continuous affordability is a new demand for space applications, therefore, some new kinds of lightweight large deployable mesh reflectors are frequently used in recent years. Here we make system design and simulation of a new kind of space large deployable reflector antenna that we proposed recently. System design shows its several superior outstanding advantages. Simulations of deploying ability, surface precision, and antenna performance, all reveal that such kind of deployable antenna has potential foreground in future space applications.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128326353","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060301
Chang Zhang, Qiang Yang, Yingning Dong
Recently, with the rapid development of inshore tourism, the appropriate beaches for antennas distribution are lesser and lesser. So it is imperative to find a new way for high frequency radar system. By locating the transmitters and receivers in a circular array can reduce the area of the transmitters and receivers in a single beach, as we locate the array in a circular mode in different places instead of a line mode in one single place. Inspired by the spatial diversity which is gained in tomographic imaging technique, this paper presents a circular array MIMO radar system used tomographic imaging technique which is the convolution back projection (CBP) algorithm. As the limitation of the signal bandwidth in high frequency band, the spatial resolution of the classical radar system is very low. However, geometric diversity obtained through MIMO radar system affords the user the opportunity to obtain additional information concerning the targets without increasing bandwidth. With the tomographic signal processing, this translates directly into increased probability of target detection. Finally, numerical experiments are also provided to demonstrate the effectiveness of the proposed methods.
{"title":"MIMO radar signal processing based on tomographic imaging technique","authors":"Chang Zhang, Qiang Yang, Yingning Dong","doi":"10.1109/RADAR.2014.7060301","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060301","url":null,"abstract":"Recently, with the rapid development of inshore tourism, the appropriate beaches for antennas distribution are lesser and lesser. So it is imperative to find a new way for high frequency radar system. By locating the transmitters and receivers in a circular array can reduce the area of the transmitters and receivers in a single beach, as we locate the array in a circular mode in different places instead of a line mode in one single place. Inspired by the spatial diversity which is gained in tomographic imaging technique, this paper presents a circular array MIMO radar system used tomographic imaging technique which is the convolution back projection (CBP) algorithm. As the limitation of the signal bandwidth in high frequency band, the spatial resolution of the classical radar system is very low. However, geometric diversity obtained through MIMO radar system affords the user the opportunity to obtain additional information concerning the targets without increasing bandwidth. With the tomographic signal processing, this translates directly into increased probability of target detection. Finally, numerical experiments are also provided to demonstrate the effectiveness of the proposed methods.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128446140","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060383
Xavier Tatopoulos
This document presents the results of investigation on a particular stress-compensated SAW resonator configuration allowing a strong improvement in g-sensitivity performance while keeping ultra-low noise characteristics. A specific oscillator architecture integrating two of these resonators is then described and tested. The final result is a 1GHz oscillator presenting unprecedented performances in g-sensitivity (<;2.10-10/g in all axis) and phase noise (-154dBc/Hz at 3kHz offset, -175dBc/Hz noise floor).
{"title":"Compact ultra-low noise SAW oscillator with reduced g-sensitivity for radar applications","authors":"Xavier Tatopoulos","doi":"10.1109/RADAR.2014.7060383","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060383","url":null,"abstract":"This document presents the results of investigation on a particular stress-compensated SAW resonator configuration allowing a strong improvement in g-sensitivity performance while keeping ultra-low noise characteristics. A specific oscillator architecture integrating two of these resonators is then described and tested. The final result is a 1GHz oscillator presenting unprecedented performances in g-sensitivity (<;2.10-10/g in all axis) and phase noise (-154dBc/Hz at 3kHz offset, -175dBc/Hz noise floor).","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128660464","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060450
G. Lellouch, A. Mishra, M. Inggs
OFDM radar has been studied in the last years for its suitability to combine communication and radar applications simultaneously. In this paper, we discuss the processing applicable to a train of OFDM pulses as from a radar prospective. We will focus on two different solutions. The first solution operates on the time domain signal while the second solution processes the signal in the frequency domain. We show that both solutions can be implemented by means of DFT and IDFT operations, which make them efficient in real time. We demonstrate that both achieve the same gain in SNR and we give examples based on simple scenarii.
{"title":"Processing alternatives in OFDM radar","authors":"G. Lellouch, A. Mishra, M. Inggs","doi":"10.1109/RADAR.2014.7060450","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060450","url":null,"abstract":"OFDM radar has been studied in the last years for its suitability to combine communication and radar applications simultaneously. In this paper, we discuss the processing applicable to a train of OFDM pulses as from a radar prospective. We will focus on two different solutions. The first solution operates on the time domain signal while the second solution processes the signal in the frequency domain. We show that both solutions can be implemented by means of DFT and IDFT operations, which make them efficient in real time. We demonstrate that both achieve the same gain in SNR and we give examples based on simple scenarii.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130055640","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060302
E. Grossi, M. Lops, L. Venturino
We consider a surveillance radar system equipped with an electronically scanned antenna and study a scanning policy divided in two phases, namely, a search phase, where the antenna beam rotates to illuminate the monitored area, and a revisit phase, where some ambiguous returns are revisited for further investigation. The revisit phase introduces additional degrees of freedom for system design, that can be exploited to improve the early-warning capability of the radar. Numerical examples are provided for a realistic scenario.
{"title":"A two-step scanning policy for early target detection in electronically scanned antenna radars","authors":"E. Grossi, M. Lops, L. Venturino","doi":"10.1109/RADAR.2014.7060302","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060302","url":null,"abstract":"We consider a surveillance radar system equipped with an electronically scanned antenna and study a scanning policy divided in two phases, namely, a search phase, where the antenna beam rotates to illuminate the monitored area, and a revisit phase, where some ambiguous returns are revisited for further investigation. The revisit phase introduces additional degrees of freedom for system design, that can be exploited to improve the early-warning capability of the radar. Numerical examples are provided for a realistic scenario.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130144493","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060263
A. Ginestet, C. Letrou, G. Beauquet, E. Fnaiech
In spite of well-known limitations, ray based methods are the quasi-unique tool for modelling the electromagnetic propagation in urban areas. As an alternative to these methods, two models based on the resolution of the Parabolic Wave Equation, and on Gaussian Beam Shooting, are proposed. Both are specifically adapted to meet the challenges of urban areas propagation: three-dimensional, wide angle approximation and considering the backscatter propagation for the first one; taking into account ground and grazing angles for the second one. A preliminary test case is presented and configurations of interest under processing are detailed.
{"title":"Adaptability of Parabolic Wave Equation and Gaussian Beam Shooting methods to electromagnetic propagation in urban configurations","authors":"A. Ginestet, C. Letrou, G. Beauquet, E. Fnaiech","doi":"10.1109/RADAR.2014.7060263","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060263","url":null,"abstract":"In spite of well-known limitations, ray based methods are the quasi-unique tool for modelling the electromagnetic propagation in urban areas. As an alternative to these methods, two models based on the resolution of the Parabolic Wave Equation, and on Gaussian Beam Shooting, are proposed. Both are specifically adapted to meet the challenges of urban areas propagation: three-dimensional, wide angle approximation and considering the backscatter propagation for the first one; taking into account ground and grazing angles for the second one. A preliminary test case is presented and configurations of interest under processing are detailed.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129078573","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060349
L. Chabod, Raphaël Girard-Claudon, E. Segura
For integrated sensor suites, a major challenge is to use as efficiently as possible the available resources: antennas, Transmit/Receive (Tx/Rx) chains, processing power, frequencies, etc... This paper is focused on the benefits provided by radar antennas in such architectures, due to their large size and power which are generally unmatched by other sensors. Examples of additional functions accessible through radar antennas are described, in the field of electronic warfare or communications. Results of technico-operational simulations of these functions are presented to illustrate expected gains in performance and reactivity. The conclusion shows the associated constraints in mission execution and shows how next generation radars will ultimately become multifunction RF sensors.
{"title":"Taking benefit of Radar resources in integrated RF sensor suites","authors":"L. Chabod, Raphaël Girard-Claudon, E. Segura","doi":"10.1109/RADAR.2014.7060349","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060349","url":null,"abstract":"For integrated sensor suites, a major challenge is to use as efficiently as possible the available resources: antennas, Transmit/Receive (Tx/Rx) chains, processing power, frequencies, etc... This paper is focused on the benefits provided by radar antennas in such architectures, due to their large size and power which are generally unmatched by other sensors. Examples of additional functions accessible through radar antennas are described, in the field of electronic warfare or communications. Results of technico-operational simulations of these functions are presented to illustrate expected gains in performance and reactivity. The conclusion shows the associated constraints in mission execution and shows how next generation radars will ultimately become multifunction RF sensors.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132499050","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060372
Pierrick Abiven, Teng Joon Lim, J. Pisane
Passive bistatic radar (PBR) is a well-known topic but research is mainly focused on detection and estimation, and relatively little work has been done on PBR imaging. This paper studies the feasibility of using existing signals for imaging airborne aircraft. The use of the FM band for that purpose is motivated by the geographic prevalence of radio broadcasting and the large size of an FM cell. For the construction of radar images, tomography principles are applied. It centered around a Fourier transform of the radar cross-section (RCS) of airplanes acquired at different frequencies, incident angles and scattered angles in order to form a radar image. However, a sufficiently large part of the Fourier space must be filled to form an interpretable image, and this depends on the available frequencies, bistatic angles and aspect angles. Those parameters are constrained by the bistatic configuration considered and the trajectory of the observed airplanes. The relationships between these parameters and PBR imaging performance are analyzed and discussed in this paper. The main contribution is the successful construction of interpretable PBR images given a realistic configuration and limited trajectories for the airplanes. We discuss the use of these images for applications such as automatic target recognition.
{"title":"FM passive bistatic radar imaging of airplanes in a real configuration","authors":"Pierrick Abiven, Teng Joon Lim, J. Pisane","doi":"10.1109/RADAR.2014.7060372","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060372","url":null,"abstract":"Passive bistatic radar (PBR) is a well-known topic but research is mainly focused on detection and estimation, and relatively little work has been done on PBR imaging. This paper studies the feasibility of using existing signals for imaging airborne aircraft. The use of the FM band for that purpose is motivated by the geographic prevalence of radio broadcasting and the large size of an FM cell. For the construction of radar images, tomography principles are applied. It centered around a Fourier transform of the radar cross-section (RCS) of airplanes acquired at different frequencies, incident angles and scattered angles in order to form a radar image. However, a sufficiently large part of the Fourier space must be filled to form an interpretable image, and this depends on the available frequencies, bistatic angles and aspect angles. Those parameters are constrained by the bistatic configuration considered and the trajectory of the observed airplanes. The relationships between these parameters and PBR imaging performance are analyzed and discussed in this paper. The main contribution is the successful construction of interpretable PBR images given a realistic configuration and limited trajectories for the airplanes. We discuss the use of these images for applications such as automatic target recognition.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130967522","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060315
C. Chanel, C. Bourlier, N. Pinel, C. Carel
This paper computes the monostatic Radar frequency and time responses of the electromagnetic field scattered by a 1D profile of a natural soil. The rough surface profile was measured with a profilometer which uses a stylus to measure the variations of the heights on the ground of a bare soil. Then, from this experimental surface, the electromagnetic response is calculated from the rigorous Method of Moments (MoM) for moderate incidence angles and by considering a Barker code as the input signal.
{"title":"Monostatic Radar time response for the electromagnetic scattering from a measured rough surface","authors":"C. Chanel, C. Bourlier, N. Pinel, C. Carel","doi":"10.1109/RADAR.2014.7060315","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060315","url":null,"abstract":"This paper computes the monostatic Radar frequency and time responses of the electromagnetic field scattered by a 1D profile of a natural soil. The rough surface profile was measured with a profilometer which uses a stylus to measure the variations of the heights on the ground of a bare soil. Then, from this experimental surface, the electromagnetic response is calculated from the rigorous Method of Moments (MoM) for moderate incidence angles and by considering a Barker code as the input signal.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131354047","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}
Pub Date : 2014-10-01DOI: 10.1109/RADAR.2014.7060299
M. Radmard, M. N. Majd, E. Bahrololoom, M. M. Chitgarha, M. Nayebi
This paper studies the placement of antennas in presence of mountains for widely separated multiple-input multiple-output (MIMO) radar. One of the challenges in this configuration is proper placement of the receive antennas in order to achieve good performance. We derived Neyman-Pearson decision rule for target detection. Via several scenarios we show that proper placement of receivers can provide better performance.
{"title":"Receivers' placement of a MIMO radar in the presence of mountains","authors":"M. Radmard, M. N. Majd, E. Bahrololoom, M. M. Chitgarha, M. Nayebi","doi":"10.1109/RADAR.2014.7060299","DOIUrl":"https://doi.org/10.1109/RADAR.2014.7060299","url":null,"abstract":"This paper studies the placement of antennas in presence of mountains for widely separated multiple-input multiple-output (MIMO) radar. One of the challenges in this configuration is proper placement of the receive antennas in order to achieve good performance. We derived Neyman-Pearson decision rule for target detection. Via several scenarios we show that proper placement of receivers can provide better performance.","PeriodicalId":317910,"journal":{"name":"2014 International Radar Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128844867","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}
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