Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894907
T. Norlander, B. Nilsson, D. Ring, U. Johansson
Results from a joint Volvo Aero and Saab Aerospace research project on active flutter suppression is presented. An LQG controller and a parametric LQ controller have been designed and evaluated on a wind tunnel model. It is seen that flutter can be avoided using active control; furthermore it is shown that parametric LQ control design techniques are well suited for design of (practical) high performance low order controllers.
{"title":"A study on active flutter detection and control","authors":"T. Norlander, B. Nilsson, D. Ring, U. Johansson","doi":"10.1109/NAECON.2000.894907","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894907","url":null,"abstract":"Results from a joint Volvo Aero and Saab Aerospace research project on active flutter suppression is presented. An LQG controller and a parametric LQ controller have been designed and evaluated on a wind tunnel model. It is seen that flutter can be avoided using active control; furthermore it is shown that parametric LQ control design techniques are well suited for design of (practical) high performance low order controllers.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132425219","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894898
Xuezhi Yang, Puchiang Yan, Lei Yan, Jianmin Wang
A new type of low frequency vibration transducer (LFVT) and the signal processing procedure used in estimation of dynamic characteristics of structure are discussed. A circuit network is adopted in the LFVT to compensate the low frequency characteristics of seismic velocity transducer with high resonant frequency, reliability and robustness, which is the primary sensor. The output characteristics of LFVT are just like those of a seismic velocity or displacement transducer with very low resonant frequency which is 1/20 to 1/50 of that of the original pick-ups. Engineering estimation methods of natural frequency and vibration mode are discussed. An improved algorithm to determine the damping ratio is put forward. In the algorithm, we use the frequency response of a second order system to fit the estimated power spectra of the signal and solve the problem of nonlinearity in this process. The algorithm has a much better precision than the generally used bandwidth method. Experiments on a railway bridge are given.
{"title":"Measurement of dynamic characteristics of structure","authors":"Xuezhi Yang, Puchiang Yan, Lei Yan, Jianmin Wang","doi":"10.1109/NAECON.2000.894898","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894898","url":null,"abstract":"A new type of low frequency vibration transducer (LFVT) and the signal processing procedure used in estimation of dynamic characteristics of structure are discussed. A circuit network is adopted in the LFVT to compensate the low frequency characteristics of seismic velocity transducer with high resonant frequency, reliability and robustness, which is the primary sensor. The output characteristics of LFVT are just like those of a seismic velocity or displacement transducer with very low resonant frequency which is 1/20 to 1/50 of that of the original pick-ups. Engineering estimation methods of natural frequency and vibration mode are discussed. An improved algorithm to determine the damping ratio is put forward. In the algorithm, we use the frequency response of a second order system to fit the estimated power spectra of the signal and solve the problem of nonlinearity in this process. The algorithm has a much better precision than the generally used bandwidth method. Experiments on a railway bridge are given.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114216136","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894965
Yanmei Li, Dongmei Li, Zhihua Wang
In aerospace applications, the Field Programmable Gate Array (FPGA) is attractive for its distinct advantages - simplicity and flexibility. But radiation-induced faults, especially Single Event Upsets (SEUs), may cause serious damage to SRAM-based FPGAs and even to the whole system. To restrain the consequences of SEUs and recover the system from radiation-induced faults, a hierarchical detection-mitigation-correction methodology based on XC4000 series FPGAs is introduced in this paper. The following techniques are included: fault identification and mitigation, soft-fault judgement and correction, hard-fault location and bypass. The effectiveness of our approach is proved through experiment and simulation. Such a detection-mitigation-correction methodology can cover almost all radiation-induced soft and hard faults and mitigate the effects of SEUs for general SRAM-based FPGAs without interrupting normal operations of the whole system.
{"title":"A new approach to detect-mitigate-correct radiation-induced faults for SRAM-based FPGAs in aerospace application","authors":"Yanmei Li, Dongmei Li, Zhihua Wang","doi":"10.1109/NAECON.2000.894965","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894965","url":null,"abstract":"In aerospace applications, the Field Programmable Gate Array (FPGA) is attractive for its distinct advantages - simplicity and flexibility. But radiation-induced faults, especially Single Event Upsets (SEUs), may cause serious damage to SRAM-based FPGAs and even to the whole system. To restrain the consequences of SEUs and recover the system from radiation-induced faults, a hierarchical detection-mitigation-correction methodology based on XC4000 series FPGAs is introduced in this paper. The following techniques are included: fault identification and mitigation, soft-fault judgement and correction, hard-fault location and bypass. The effectiveness of our approach is proved through experiment and simulation. Such a detection-mitigation-correction methodology can cover almost all radiation-induced soft and hard faults and mitigate the effects of SEUs for general SRAM-based FPGAs without interrupting normal operations of the whole system.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114950199","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894961
B. Tsao, S. Heidger, J. Weimer
Thin PZT film is being developed for use in microelectronics, electromechanical and optoelectronic applications. Thin Pb(ZrTi)O/sub 3/ film capacitor devices were fabricated using RF sputtering techniques. The multiple-layer configuration of Si/SiO/sub 2//Ti/Pt was used as the substrate and bottom electrode. The top electrode was Pt. At 1 kHz, the dissipation factor (tangent loss) of PZT film capacitors processed at 100/spl deg/C was 8.35%. However the dissipation factor of PZT film capacitor processed at 60/spl deg/C was only 0.35%. The dielectric constant was calculated to be 32 at 1 kHz. After annealing at 400/spl deg/C, the dielectric constant increased about 33% to 43. The dielectric constant increased to 165 after annealing at 500/spl deg/C and to 1143 after annealing at 600/spl deg/C. The PZT film capacitors produced to-date had little dependence on frequency from 20 Hz to 100 kHz. The frequency dependence increased with increasing annealing temperature from 400/spl deg/C to 600/spl deg/C. Lowering the processing temperature from 100/spl deg/C to 60/spl deg/C resulted in a tremendous decrease in the dissipation factor from 8.3% to 0.35%.
{"title":"Low temperature processed lead zirconate titanate (PZT) film as dielectric for capacitor applications","authors":"B. Tsao, S. Heidger, J. Weimer","doi":"10.1109/NAECON.2000.894961","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894961","url":null,"abstract":"Thin PZT film is being developed for use in microelectronics, electromechanical and optoelectronic applications. Thin Pb(ZrTi)O/sub 3/ film capacitor devices were fabricated using RF sputtering techniques. The multiple-layer configuration of Si/SiO/sub 2//Ti/Pt was used as the substrate and bottom electrode. The top electrode was Pt. At 1 kHz, the dissipation factor (tangent loss) of PZT film capacitors processed at 100/spl deg/C was 8.35%. However the dissipation factor of PZT film capacitor processed at 60/spl deg/C was only 0.35%. The dielectric constant was calculated to be 32 at 1 kHz. After annealing at 400/spl deg/C, the dielectric constant increased about 33% to 43. The dielectric constant increased to 165 after annealing at 500/spl deg/C and to 1143 after annealing at 600/spl deg/C. The PZT film capacitors produced to-date had little dependence on frequency from 20 Hz to 100 kHz. The frequency dependence increased with increasing annealing temperature from 400/spl deg/C to 600/spl deg/C. Lowering the processing temperature from 100/spl deg/C to 60/spl deg/C resulted in a tremendous decrease in the dissipation factor from 8.3% to 0.35%.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133184710","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894952
W. C. Young, Mingten Tsai, Li Chuang
The airspace system's capacity and safety are highly dependent on the skilled coordination of air traffic control (ATC) and flight desk personnel. With the rapid progress in satellite-based navigation technology and the automation system in the flight desk, some researchers suggest increasing the level of automation in ATC for the purpose of meeting the safety and efficiency requirement. But on the other side, another issue that has to be considered is that the keep increasing automation level will limit the ATC controller's margin and they cannot effectively monitor the ATC procedure at some point. This could be dangerous when the automation system failure or unpredicted environmental disturbances occur. The role of human factors in ATC has been carefully discussed and examined in the past and some current human factor issues continue to reflect the technological progress. As a consequence of these concerns, in fall 1994, the National Research Council established the Panel on Human Factors in Air Traffic Control Automation for Federal Aviation Administration (FAA).
{"title":"Air traffic control system management","authors":"W. C. Young, Mingten Tsai, Li Chuang","doi":"10.1109/NAECON.2000.894952","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894952","url":null,"abstract":"The airspace system's capacity and safety are highly dependent on the skilled coordination of air traffic control (ATC) and flight desk personnel. With the rapid progress in satellite-based navigation technology and the automation system in the flight desk, some researchers suggest increasing the level of automation in ATC for the purpose of meeting the safety and efficiency requirement. But on the other side, another issue that has to be considered is that the keep increasing automation level will limit the ATC controller's margin and they cannot effectively monitor the ATC procedure at some point. This could be dangerous when the automation system failure or unpredicted environmental disturbances occur. The role of human factors in ATC has been carefully discussed and examined in the past and some current human factor issues continue to reflect the technological progress. As a consequence of these concerns, in fall 1994, the National Research Council established the Panel on Human Factors in Air Traffic Control Automation for Federal Aviation Administration (FAA).","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126956381","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894896
'. TODM.SCHUCK, Bill Shoemaker, Jeff WILLEYml
The importance of quantifying and modeling sensor uncertainties associated with kinematic, attribute, and hybrid sensors and their effect on the data fusion process (Bayesian, Dempster-Shafer, etc.) has not been well described. This paper explores some of the characteristics and uncertainties associated with MK XII Identification Friend-or-Foe (IFF) including its limitations, inherent error sources, and robustness to jamming and interference. A general multi-source sensor fusion process is described using Non-Cooperative Target Recognition, electronic support measures and IFF dissimilar source inputs with specific attention placed on realizable IFF sensor systems and how they need to be characterized in order to understand and design an optimized and effective multi-source fusion process.
{"title":"Identification friend-or-foe (IFF) sensor uncertainties, ambiguities, deception and their application to the multi-source fusion process","authors":"'. TODM.SCHUCK, Bill Shoemaker, Jeff WILLEYml","doi":"10.1109/NAECON.2000.894896","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894896","url":null,"abstract":"The importance of quantifying and modeling sensor uncertainties associated with kinematic, attribute, and hybrid sensors and their effect on the data fusion process (Bayesian, Dempster-Shafer, etc.) has not been well described. This paper explores some of the characteristics and uncertainties associated with MK XII Identification Friend-or-Foe (IFF) including its limitations, inherent error sources, and robustness to jamming and interference. A general multi-source sensor fusion process is described using Non-Cooperative Target Recognition, electronic support measures and IFF dissimilar source inputs with specific attention placed on realizable IFF sensor systems and how they need to be characterized in order to understand and design an optimized and effective multi-source fusion process.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116806403","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894977
J. Fisher, E. Murphy, S. Bibyk
While the conventional concept of a signal coder-decoder (codec) is of a homogeneous device, such that the output decoding is simply an inverse of the input decoding, the heterogeneous codec developed in this paper decouples the input and output decoding; this variation generalizes the system. A control codec is an application of a heterogeneous codec, which replaces a traditional discrete analog control loop. This analog control loop includes an A/D (coder) plus a D/A (decoder), as well as other peripheral signal processing algorithms. Our application of the control codec is to improve the control of RF transponders in satellites. The codec is shown to have the ability to be optimized for a specific application as well as to be re-targeted to different fabrication lines. Because of the environmental demands on spaceborne devices several stable radiation-hardened SOI BiCMOS processes were used. The MIT Lincoln Labs AST Fully Depleted SOI deep-submicron process was also used as an example of re-targeting. Further, we develop the design for a control codec as an application of a general class of heterogeneous, process-independent codecs. The concepts for both a heterogeneous codec and a control codec are important additions to mixed-signal system design because they facilitate analog and mixed-signal block reuse. Our methodology implements a deliberate mixed-signal design decomposition, which enhances the reuse. This reuse is a major advancement in the development of evolvable hardware that uses both analog and digital signal processing in SoC applications.
{"title":"Design methods for system-on-a-chip control codecs to enhance performance and reuse","authors":"J. Fisher, E. Murphy, S. Bibyk","doi":"10.1109/NAECON.2000.894977","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894977","url":null,"abstract":"While the conventional concept of a signal coder-decoder (codec) is of a homogeneous device, such that the output decoding is simply an inverse of the input decoding, the heterogeneous codec developed in this paper decouples the input and output decoding; this variation generalizes the system. A control codec is an application of a heterogeneous codec, which replaces a traditional discrete analog control loop. This analog control loop includes an A/D (coder) plus a D/A (decoder), as well as other peripheral signal processing algorithms. Our application of the control codec is to improve the control of RF transponders in satellites. The codec is shown to have the ability to be optimized for a specific application as well as to be re-targeted to different fabrication lines. Because of the environmental demands on spaceborne devices several stable radiation-hardened SOI BiCMOS processes were used. The MIT Lincoln Labs AST Fully Depleted SOI deep-submicron process was also used as an example of re-targeting. Further, we develop the design for a control codec as an application of a general class of heterogeneous, process-independent codecs. The concepts for both a heterogeneous codec and a control codec are important additions to mixed-signal system design because they facilitate analog and mixed-signal block reuse. Our methodology implements a deliberate mixed-signal design decomposition, which enhances the reuse. This reuse is a major advancement in the development of evolvable hardware that uses both analog and digital signal processing in SoC applications.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121844399","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894936
M. Raphael, S. DeLoach
The goal of the agentTool project at the Air Force Institute of Technology is to specify, design, and semiautomatically generate multiagent systems. The key to this ability is an underlying knowledge base that manages the knowledge used by the system designer in creating intelligent agent-based software applications. This paper describes the Agent knowledge Interchange Mechanism (AIM), the agentTool knowledge base. There are four main components to AIM: the knowledge parser, the Multiagent Markup Language, the AIM domain model, and the Agent-oriented Random-Access Meta-Structure (ARAMS). AIM is implemented using a multiagent system architecture that permits multiple developers to share a single knowledge base thus directly supporting collaborative system design and knowledge reuse.
{"title":"A knowledge base for knowledge-based multiagent system construction","authors":"M. Raphael, S. DeLoach","doi":"10.1109/NAECON.2000.894936","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894936","url":null,"abstract":"The goal of the agentTool project at the Air Force Institute of Technology is to specify, design, and semiautomatically generate multiagent systems. The key to this ability is an underlying knowledge base that manages the knowledge used by the system designer in creating intelligent agent-based software applications. This paper describes the Agent knowledge Interchange Mechanism (AIM), the agentTool knowledge base. There are four main components to AIM: the knowledge parser, the Multiagent Markup Language, the AIM domain model, and the Agent-oriented Random-Access Meta-Structure (ARAMS). AIM is implemented using a multiagent system architecture that permits multiple developers to share a single knowledge base thus directly supporting collaborative system design and knowledge reuse.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124735917","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894897
D. Banaszak
The Air Force invented a new calibration technique, which allows one person to perform multiple end-to-end mechanical calibrations of structural dynamics measurement systems. An end-to-end calibration means a full calibration of instrumentation from the physical input to the transducer to the output where the analog or digital signal is normally analyzed. It is difficult to stimulate mounted and embedded transducers with known physical inputs. Normally two people calibrate-one at the transducer holds or attaches the exciter and one operates the recorder. This new technique uses remote control structural exciters to stimulate measurement transducers contained in structures, with a measurable input level, and the output signal is communicated to a data recorder. The Air Force demonstrated this patented technique by using accelerometers in the laboratory. A commercial off-the-shelf vibration paging system sends a signal from a master control unit to individual exciters that stimulate accelerometers mounted on structures. A reference accelerometer measures the input. Engineers validated the technique using eight different exciters in a completely randomized block design experiment consisting of three 2-level factors: material, structural thickness and excitation mode. The engineers measured amplitude, frequency and transfer function between the accelerometers. This paper describes the invention and looks at potential field applications to insure data integrity in structural data acquisition systems on aging commercial and military vehicles.
{"title":"Remote control structural exciters for structural data acquisition system calibrations","authors":"D. Banaszak","doi":"10.1109/NAECON.2000.894897","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894897","url":null,"abstract":"The Air Force invented a new calibration technique, which allows one person to perform multiple end-to-end mechanical calibrations of structural dynamics measurement systems. An end-to-end calibration means a full calibration of instrumentation from the physical input to the transducer to the output where the analog or digital signal is normally analyzed. It is difficult to stimulate mounted and embedded transducers with known physical inputs. Normally two people calibrate-one at the transducer holds or attaches the exciter and one operates the recorder. This new technique uses remote control structural exciters to stimulate measurement transducers contained in structures, with a measurable input level, and the output signal is communicated to a data recorder. The Air Force demonstrated this patented technique by using accelerometers in the laboratory. A commercial off-the-shelf vibration paging system sends a signal from a master control unit to individual exciters that stimulate accelerometers mounted on structures. A reference accelerometer measures the input. Engineers validated the technique using eight different exciters in a completely randomized block design experiment consisting of three 2-level factors: material, structural thickness and excitation mode. The engineers measured amplitude, frequency and transfer function between the accelerometers. This paper describes the invention and looks at potential field applications to insure data integrity in structural data acquisition systems on aging commercial and military vehicles.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122495445","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 : 2000-10-10DOI: 10.1109/NAECON.2000.894993
J. Guerci, S. Pillai
Recent advances in linear amplifier and arbitrary waveform generation technology have spawned interest in adaptive transmitter systems as a means for both optimizing target signal gain and enhancing ID. In this paper, rigorous theoretical performance bounds are constructively established for the joint transmitter-target-channel-receiver optimization problem in the presence of additive colored noise (ACN), (e.g., interference multipath). For the ACN case, an analytical solution is obtained as an eigenvector (with associated maximum eigenvalue) of a homogeneous Fredholm integral equation of the second type. The kernel function is Hermitian and is obtained from the cascade of the target impulse response with the ACN whitening filter. The, theoretical performance gains achievable over conventional transmitter strategies (e.g., chirp) are presented for various simulation scenarios including interference multipath mitigation. Also discussed, is the potential effectiveness of an optimal discriminating pulse solution for the N-target ID problem that arises naturally from the theory.
{"title":"Adaptive transmission radar: the next \"wave\"?","authors":"J. Guerci, S. Pillai","doi":"10.1109/NAECON.2000.894993","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894993","url":null,"abstract":"Recent advances in linear amplifier and arbitrary waveform generation technology have spawned interest in adaptive transmitter systems as a means for both optimizing target signal gain and enhancing ID. In this paper, rigorous theoretical performance bounds are constructively established for the joint transmitter-target-channel-receiver optimization problem in the presence of additive colored noise (ACN), (e.g., interference multipath). For the ACN case, an analytical solution is obtained as an eigenvector (with associated maximum eigenvalue) of a homogeneous Fredholm integral equation of the second type. The kernel function is Hermitian and is obtained from the cascade of the target impulse response with the ACN whitening filter. The, theoretical performance gains achievable over conventional transmitter strategies (e.g., chirp) are presented for various simulation scenarios including interference multipath mitigation. Also discussed, is the potential effectiveness of an optimal discriminating pulse solution for the N-target ID problem that arises naturally from the theory.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126942730","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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