Pub Date : 2015-12-07DOI: 10.1109/EURAD.2015.7346315
A. Friedrich, L. Berkelmann, T. Martinelli, Bernd Geck, Oliver Klemp, I. Kriebitzsch
This contribution contains the design of a three-dimensional (3d) active antenna operating in the civil global positioning satellite system (GPS) for an automotive application. Designing the antenna a new approach is used combining a slotted patch antenna with a 3d surface modulation of the antenna substrate. Thus, an optimization of the antenna dimensions is achieved considering a given installation space. In addition, the space gained due to the modulation of the antenna surface is used to integrate the circuit of a low noise amplifier (LNA). This two stage LNA designed especially for this application is positioned directly underneath the 3d surface of the antenna ensuring minimal transmission line length between feeding point and input of the LNA. A prototypical realization is done using 3d molded interconnect devices (MID) technology metalizing the 3d surface with laser direct structuring (LDS) method. The simulated and measured RF characteristics are discussed.
{"title":"An active three-dimensional GPS patch antenna using MID-technology","authors":"A. Friedrich, L. Berkelmann, T. Martinelli, Bernd Geck, Oliver Klemp, I. Kriebitzsch","doi":"10.1109/EURAD.2015.7346315","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346315","url":null,"abstract":"This contribution contains the design of a three-dimensional (3d) active antenna operating in the civil global positioning satellite system (GPS) for an automotive application. Designing the antenna a new approach is used combining a slotted patch antenna with a 3d surface modulation of the antenna substrate. Thus, an optimization of the antenna dimensions is achieved considering a given installation space. In addition, the space gained due to the modulation of the antenna surface is used to integrate the circuit of a low noise amplifier (LNA). This two stage LNA designed especially for this application is positioned directly underneath the 3d surface of the antenna ensuring minimal transmission line length between feeding point and input of the LNA. A prototypical realization is done using 3d molded interconnect devices (MID) technology metalizing the 3d surface with laser direct structuring (LDS) method. The simulated and measured RF characteristics are discussed.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133087573","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 : 2015-12-07DOI: 10.1109/EURAD.2015.7346266
Sebastian Olbrich, C. Waldschmidt
This paper shows a technique to enhance the resolution of a frequency modulated continuous wave (FMCW) radar system. The range resolution of an FMCW radar system is limited by the bandwidth of the transmitted signal. By using high resolution methods such as the Matrix Pencil Method (MPM) it is possible to enhance the resolution. In this paper a new method to obtain a better resolution for FMCW radar systems is used. This new method is based on the MPM and is enhanced to require less computing power. To evaluate this new technique, simulations and measurements are used. The result shows that this new method is able to improve the performance of FMCW radar systems.
{"title":"New pre-estimation algorithm for FMCW radar systems using the Matrix Pencil Method","authors":"Sebastian Olbrich, C. Waldschmidt","doi":"10.1109/EURAD.2015.7346266","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346266","url":null,"abstract":"This paper shows a technique to enhance the resolution of a frequency modulated continuous wave (FMCW) radar system. The range resolution of an FMCW radar system is limited by the bandwidth of the transmitted signal. By using high resolution methods such as the Matrix Pencil Method (MPM) it is possible to enhance the resolution. In this paper a new method to obtain a better resolution for FMCW radar systems is used. This new method is based on the MPM and is enhanced to require less computing power. To evaluate this new technique, simulations and measurements are used. The result shows that this new method is able to improve the performance of FMCW radar systems.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127802162","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 : 2015-12-07DOI: 10.1109/EURAD.2015.7346259
T. Hoshino, K. Suwa, Noboru Oishi, T. Wakayama, T. Hara
For urban area monitoring, detection and classification of small targets with synthetic aperture radar imagery are one of the useful solutions. The conventional method has the problem that when a target on both master and slave images at the same position has the same radar cross section, it does not classify the target as either a slightly moved reparked vehicle or as a different vehicle. To overcome this problem, we propose a Fourier-transform-based simple phase compensation method for both accurate coherence estimation and classification of the reparked vehicle's status. The proposed method obtains the maximum value of the frequency basis, and also determines the threshold, which is based on effective sample number, with a constant false alarm rate. This number is determined by the peak signal-to-noise ratio in estimation window, and are used on the preprocessed probability density function for each sample number. Finally, the proposed method classifies a target as either a slightly moved vehicle or as a different vehicle by using both the proposed coherence and threshold detection, which enables it to determine the target status. Experimental results with the COSMO-SkyMed X-band spotlight SAR images demonstrate the effectiveness of the proposed method.
{"title":"Parked vehicle detection and status evaluation on X-band spotlight-mode SAR interferometry","authors":"T. Hoshino, K. Suwa, Noboru Oishi, T. Wakayama, T. Hara","doi":"10.1109/EURAD.2015.7346259","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346259","url":null,"abstract":"For urban area monitoring, detection and classification of small targets with synthetic aperture radar imagery are one of the useful solutions. The conventional method has the problem that when a target on both master and slave images at the same position has the same radar cross section, it does not classify the target as either a slightly moved reparked vehicle or as a different vehicle. To overcome this problem, we propose a Fourier-transform-based simple phase compensation method for both accurate coherence estimation and classification of the reparked vehicle's status. The proposed method obtains the maximum value of the frequency basis, and also determines the threshold, which is based on effective sample number, with a constant false alarm rate. This number is determined by the peak signal-to-noise ratio in estimation window, and are used on the preprocessed probability density function for each sample number. Finally, the proposed method classifies a target as either a slightly moved vehicle or as a different vehicle by using both the proposed coherence and threshold detection, which enables it to determine the target status. Experimental results with the COSMO-SkyMed X-band spotlight SAR images demonstrate the effectiveness of the proposed method.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128450364","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 : 2015-12-07DOI: 10.1109/EURAD.2015.7346252
Y. L. Sit, B. Sobhani, W. Wiesbeck, T. Zwick
This paper presents a simple OFDM-based MIMO radar for real-time area surveillance applications. The radar is able to estimate range, velocity and azimuthal positions of multiple objects simultaneously within one transmit cycle. Detection, clustering, data association and tracking are then performed to estimate the number of targets, extract the target trajectories and improve the positioning accuracy. The radar processing and algorithms have been chosen so that a real-time implementation is feasible, while providing a satisfactory performance. The performance of the radar system is evaluated by numerical simulations for an automotive scenario with multiple targets.
{"title":"Simple OFDM-based MIMO radar for real-time short-range area surveillance","authors":"Y. L. Sit, B. Sobhani, W. Wiesbeck, T. Zwick","doi":"10.1109/EURAD.2015.7346252","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346252","url":null,"abstract":"This paper presents a simple OFDM-based MIMO radar for real-time area surveillance applications. The radar is able to estimate range, velocity and azimuthal positions of multiple objects simultaneously within one transmit cycle. Detection, clustering, data association and tracking are then performed to estimate the number of targets, extract the target trajectories and improve the positioning accuracy. The radar processing and algorithms have been chosen so that a real-time implementation is feasible, while providing a satisfactory performance. The performance of the radar system is evaluated by numerical simulations for an automotive scenario with multiple targets.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123145286","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 : 2015-12-07DOI: 10.1109/EURAD.2015.7346237
Marthe Marie Meltzer, Petter Ostenstad, A. Hesby, Guri Nonsvik, B. Sagsveen
In this paper we introduce a novel method to measure refractivity profiles in the lowest 40 meters of the atmosphere using the radiosonde Vaisala RS92-SGP and a pneumatic line thrower. We show that the radiosonde's measurement accuracy is maintained after launch, and we present refractivity profiles from two sea trials. The results show that we are able to do high resolution refractivity measurements using the proposed method. The derived evaporation duct heights (EDH) from the refractivity profiles are compared to the EDH estimated with the Paulus-Jeske (PJ) model and the Naval Postgraduate School (NPS) model. The measured EDH differs from the EDH calculated with the PJ and NPS models in both stable and unstable conditions with low wind speeds.
{"title":"Measuring refractivity profiles in the marine environment using radiosondes launched with a pneumatic line thrower","authors":"Marthe Marie Meltzer, Petter Ostenstad, A. Hesby, Guri Nonsvik, B. Sagsveen","doi":"10.1109/EURAD.2015.7346237","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346237","url":null,"abstract":"In this paper we introduce a novel method to measure refractivity profiles in the lowest 40 meters of the atmosphere using the radiosonde Vaisala RS92-SGP and a pneumatic line thrower. We show that the radiosonde's measurement accuracy is maintained after launch, and we present refractivity profiles from two sea trials. The results show that we are able to do high resolution refractivity measurements using the proposed method. The derived evaporation duct heights (EDH) from the refractivity profiles are compared to the EDH estimated with the Paulus-Jeske (PJ) model and the Naval Postgraduate School (NPS) model. The measured EDH differs from the EDH calculated with the PJ and NPS models in both stable and unstable conditions with low wind speeds.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121572943","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 : 2015-12-07DOI: 10.1109/EURAD.2015.7346271
P. Ghelfi, D. Onori, F. Laghezza, F. Scotti, A. Bogoni, A. Albertoni, A. Tafuto
We present the design and simulative results of an innovative RF receiver based on photonic techniques that quickly scans the RF band of interest in warfare applications, avoiding the spectrum channelization and thus reducing the receiver SWaP. The scheme is based on a stable mode-locked laser and a specifically designed tunable optical filter, and it simultaneously samples, filters, and down-converts the detected spectrum. The analysis confirms the scheme capability for detecting signals beyond 18GHz, with instantaneous bandwidth >1GHz and dynamic range >40dB. The scheme implementation with integrated photonics technologies will ensure fast scanning (filter repositioning in <;100ns), high environmental stability, and reduced SWaP, meeting the increasingly stringent requirements of electronic warfare applications.
{"title":"An RF scanning receiver based on photonics for electronic warfare applications","authors":"P. Ghelfi, D. Onori, F. Laghezza, F. Scotti, A. Bogoni, A. Albertoni, A. Tafuto","doi":"10.1109/EURAD.2015.7346271","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346271","url":null,"abstract":"We present the design and simulative results of an innovative RF receiver based on photonic techniques that quickly scans the RF band of interest in warfare applications, avoiding the spectrum channelization and thus reducing the receiver SWaP. The scheme is based on a stable mode-locked laser and a specifically designed tunable optical filter, and it simultaneously samples, filters, and down-converts the detected spectrum. The analysis confirms the scheme capability for detecting signals beyond 18GHz, with instantaneous bandwidth >1GHz and dynamic range >40dB. The scheme implementation with integrated photonics technologies will ensure fast scanning (filter repositioning in <;100ns), high environmental stability, and reduced SWaP, meeting the increasingly stringent requirements of electronic warfare applications.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129005872","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 : 2015-12-07DOI: 10.1109/EURAD.2015.7346279
E. Schreiber, M. Peichl, S. Dill, S. Anger, A. Heinzel, F. Bischeltsrieder, T. Kempf, M. Jirousek
Many countries face the problem of land mines and unexploded ordnance contaminated land sections which present a significant risk to the civilian population. The detection and subsequent clearance of these explosive hazardous substances is therefore extremely important and necessary. Ground penetrating radar (GPR) is a suitable tool and is considered as a complementing sensor since nearly two decades. However, most GPRs operate in very close distance to ground in a rather punctual method of operation. In contrast, synthetic aperture radar (SAR) is a technique allowing fast and laminar stand-off investigation of an area. In this paper the final radar hardware setup and first railway based measurements are described.
{"title":"Theoretical and experimental investigations of a ground-based high-resolution SAR for buried object detection","authors":"E. Schreiber, M. Peichl, S. Dill, S. Anger, A. Heinzel, F. Bischeltsrieder, T. Kempf, M. Jirousek","doi":"10.1109/EURAD.2015.7346279","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346279","url":null,"abstract":"Many countries face the problem of land mines and unexploded ordnance contaminated land sections which present a significant risk to the civilian population. The detection and subsequent clearance of these explosive hazardous substances is therefore extremely important and necessary. Ground penetrating radar (GPR) is a suitable tool and is considered as a complementing sensor since nearly two decades. However, most GPRs operate in very close distance to ground in a rather punctual method of operation. In contrast, synthetic aperture radar (SAR) is a technique allowing fast and laminar stand-off investigation of an area. In this paper the final radar hardware setup and first railway based measurements are described.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128594015","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 : 2015-12-07DOI: 10.1109/EURAD.2015.7346231
S. Tebaldini, F. Rocca, A. Meta, A. Coccia
The ESA field experiment AlpTomoSAR has been planned to investigate the capabilities and potential of L-Band Synthetic Aperture Radar Tomography (TomoSAR) for studying the internal structures of glaciers and ice sheets. The scientific interest in this activity is motivated by the need for improved observations of snow and ice, which are relevant to climate researches and water management. TomoSAR represents today a new potential tool to obtain significant improvements in the capability to characterize natural media from remotely sensed data, providing 3D resolution capabilities of the imaged media. In this paper we present a tomographic analysis of the Mittelbergferner glacier, illuminated during AlpTomoSAR by flying repeatedly along an oval-like racetrack. 3D Single Look Complex cubes were focused for two opposite views by jointly processing all passes in the 3D space, resulting in a spatial resolution cell of about 2 m in all directions. The 3D data cubes were used as a basis for further physical analyses, revealing the presence of scattering elements at few tens of meters below the ice/snow interface.
{"title":"3D imaging of an alpine glacier: Signal processing of data from the AlpTomoSAR campaign","authors":"S. Tebaldini, F. Rocca, A. Meta, A. Coccia","doi":"10.1109/EURAD.2015.7346231","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346231","url":null,"abstract":"The ESA field experiment AlpTomoSAR has been planned to investigate the capabilities and potential of L-Band Synthetic Aperture Radar Tomography (TomoSAR) for studying the internal structures of glaciers and ice sheets. The scientific interest in this activity is motivated by the need for improved observations of snow and ice, which are relevant to climate researches and water management. TomoSAR represents today a new potential tool to obtain significant improvements in the capability to characterize natural media from remotely sensed data, providing 3D resolution capabilities of the imaged media. In this paper we present a tomographic analysis of the Mittelbergferner glacier, illuminated during AlpTomoSAR by flying repeatedly along an oval-like racetrack. 3D Single Look Complex cubes were focused for two opposite views by jointly processing all passes in the 3D space, resulting in a spatial resolution cell of about 2 m in all directions. The 3D data cubes were used as a basis for further physical analyses, revealing the presence of scattering elements at few tens of meters below the ice/snow interface.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117190338","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 : 2015-12-07DOI: 10.1109/EURAD.2015.7346225
S. Gelli, A. Bacci, M. Martorella, F. Berizzi
Moving targets appear defocused within SAR images and their detection is a challenging especially in the case of targets embedded in strong clutter. Moreover, in bistatic geometries, the clutter echo returns are range dependent. This situation degrades significantly STAP performance. In this paper, an adaptive compensation to homogenize data is performed first. This operation allow the proposed Space Doppler Adaptive Processing to be used to suppress bistatic ground clutter improving detection capabilities. Then, ISAR technique is used to obtain well focused images of extended non-cooperative moving targets. Two principal issues will be addressed. First combination of bistatic adaptive clutter suppression in the space-Doppler domain and ISAR technique is presented. Then a suboptimal approach is proposed to overcome computational issue. Result using simulated data are shown.
{"title":"Space-Doppler processing with adaptive compensation for bistatic multichannel ISAR imaging of non-cooperative targets","authors":"S. Gelli, A. Bacci, M. Martorella, F. Berizzi","doi":"10.1109/EURAD.2015.7346225","DOIUrl":"https://doi.org/10.1109/EURAD.2015.7346225","url":null,"abstract":"Moving targets appear defocused within SAR images and their detection is a challenging especially in the case of targets embedded in strong clutter. Moreover, in bistatic geometries, the clutter echo returns are range dependent. This situation degrades significantly STAP performance. In this paper, an adaptive compensation to homogenize data is performed first. This operation allow the proposed Space Doppler Adaptive Processing to be used to suppress bistatic ground clutter improving detection capabilities. Then, ISAR technique is used to obtain well focused images of extended non-cooperative moving targets. Two principal issues will be addressed. First combination of bistatic adaptive clutter suppression in the space-Doppler domain and ISAR technique is presented. Then a suboptimal approach is proposed to overcome computational issue. Result using simulated data are shown.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116460217","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 : 2015-12-07DOI: 10.1109/EUMC.2015.7346071
Shuw-Guann Lin, D. Chang, Y. Juang, H. Chiou
As generating the wideband modulation signals, the signal quality is usually degraded by many impairments such as I/Q path delay, non-flat RF frequency response and etc. In this paper, the authors propose two methods by using Keysight SystemVue™ to create the modulation signals and download them to an arbitrary waveform generator (AWG) for further calibration. To compare these two methods, a 64 QAM modulation waveform with a bandwidth over 1GHz was evaluated. The first method is multi-tone scalar calibration which improves the error vector magnitude (EVM) from 5.3 % to 4.2 %. The other one is vector calibration which improves the EVM from 5.3% to 1.1%. Finally, these signals are used to measure the system performance of an amplifier. As found, the modulation signal with vector calibration can show the more exact effect of AM/AM and AM/PM on EVM of the amplifier than scalar does.
{"title":"Comparison study of scalar and vector calibrations for wideband modulation signals","authors":"Shuw-Guann Lin, D. Chang, Y. Juang, H. Chiou","doi":"10.1109/EUMC.2015.7346071","DOIUrl":"https://doi.org/10.1109/EUMC.2015.7346071","url":null,"abstract":"As generating the wideband modulation signals, the signal quality is usually degraded by many impairments such as I/Q path delay, non-flat RF frequency response and etc. In this paper, the authors propose two methods by using Keysight SystemVue™ to create the modulation signals and download them to an arbitrary waveform generator (AWG) for further calibration. To compare these two methods, a 64 QAM modulation waveform with a bandwidth over 1GHz was evaluated. The first method is multi-tone scalar calibration which improves the error vector magnitude (EVM) from 5.3 % to 4.2 %. The other one is vector calibration which improves the EVM from 5.3% to 1.1%. Finally, these signals are used to measure the system performance of an amplifier. As found, the modulation signal with vector calibration can show the more exact effect of AM/AM and AM/PM on EVM of the amplifier than scalar does.","PeriodicalId":376019,"journal":{"name":"2015 European Radar Conference (EuRAD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130688648","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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