Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894969
M. L. Roberts, M. Temple, R. Raines, J. P. Stephens
This research characterizes the initial acquisition performance of a transform domain communication system (TDCS) via modeling and simulation. As previously demonstrated a TDCS provides an effective interference suppression capability and differs from traditional spread spectrum systems in two primary ways: 1) spectrally crowded regions are avoided via adaptive spectral notching, and 2) no carrier modulation is employed; rather "noise-like" basis functions are data modulated. Relevant TDCS research has unrealistically assumed perfect synchronization conditions, a vitally important and complex element of most digital communication systems. This research investigated initial TDCS acquisition performance for various synchronization codewords and several acquisition methods, e.g., direct time correlation (DTC) and German's technique, using both peak and threshold detection techniques. Theoretical development and MATLAB(R) simulations results indicate a TDCS can achieve a high probability of detection (P/sub 0/>0.9) for relatively low input Signal-to-Noise Ratios (SNRs), as low as -23 dB for peak detection and -21 dB for threshold detection. DTC results are shown to approximate matched filter performance while providing reasonable improvement over radiometric processing. Extensive computer simulations and subsequent analysis indicate that a TDCS can adequately acquire and accurately align a locally generated reference waveform with a received noise-like TDCS signal.
{"title":"Transform domain communications: interference avoidance and acquisition capabilities","authors":"M. L. Roberts, M. Temple, R. Raines, J. P. Stephens","doi":"10.1109/NAECON.2000.894969","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894969","url":null,"abstract":"This research characterizes the initial acquisition performance of a transform domain communication system (TDCS) via modeling and simulation. As previously demonstrated a TDCS provides an effective interference suppression capability and differs from traditional spread spectrum systems in two primary ways: 1) spectrally crowded regions are avoided via adaptive spectral notching, and 2) no carrier modulation is employed; rather \"noise-like\" basis functions are data modulated. Relevant TDCS research has unrealistically assumed perfect synchronization conditions, a vitally important and complex element of most digital communication systems. This research investigated initial TDCS acquisition performance for various synchronization codewords and several acquisition methods, e.g., direct time correlation (DTC) and German's technique, using both peak and threshold detection techniques. Theoretical development and MATLAB(R) simulations results indicate a TDCS can achieve a high probability of detection (P/sub 0/>0.9) for relatively low input Signal-to-Noise Ratios (SNRs), as low as -23 dB for peak detection and -21 dB for threshold detection. DTC results are shown to approximate matched filter performance while providing reasonable improvement over radiometric processing. Extensive computer simulations and subsequent analysis indicate that a TDCS can adequately acquire and accurately align a locally generated reference waveform with a received noise-like TDCS signal.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"10 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":"126198019","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.2000.894922
Scott A. O'Malley, Athie L. Self, S. DeLoach
This paper analyzes the performance differences between static and mobile multiagent systems. To do so, we developed solutions to a distributed text search problem, each using a different approach to multiagent systems (static versus mobile) on an isolated test network. Changes were then made to the agent environment, various constraints applied, and the resulting effect on the systems measured. Each system was evaluated using a number of performance metrics to demonstrate the strengths and weaknesses of the respective approach.
{"title":"Comparing performance of static versus mobile multiagent systems","authors":"Scott A. O'Malley, Athie L. Self, S. DeLoach","doi":"10.1109/NAECON.2000.894922","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894922","url":null,"abstract":"This paper analyzes the performance differences between static and mobile multiagent systems. To do so, we developed solutions to a distributed text search problem, each using a different approach to multiagent systems (static versus mobile) on an isolated test network. Changes were then made to the agent environment, various constraints applied, and the resulting effect on the systems measured. Each system was evaluated using a number of performance metrics to demonstrate the strengths and weaknesses of the respective approach.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"87 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":"127178171","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.2000.894890
P. A. Noe, T. Hartrum
The Unified Modeling Language (UML) has been incorporated into the CASE tool, Rational Rose98, offering the user the capability of specifying systems using UML notation, Booch notation, or Rumbaugh notation. Through this research effort, Rose98 has been extended to allow formal notation to be entered in the class diagram text fields. Rose scripts were developed to transform the resulting extended Rose model into Z (zed) specifications in LATEX format. Z specifications are developed for the object model, dynamic model, and functional model based on information gathered from the class diagram and state transition diagram of the Rose model. These specifications can then be parsed into a tool supporting formal methods and Ada code can be automatically generated.
{"title":"Extending the notation of Rational Rose 98 for use with formal methods","authors":"P. A. Noe, T. Hartrum","doi":"10.1109/NAECON.2000.894890","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894890","url":null,"abstract":"The Unified Modeling Language (UML) has been incorporated into the CASE tool, Rational Rose98, offering the user the capability of specifying systems using UML notation, Booch notation, or Rumbaugh notation. Through this research effort, Rose98 has been extended to allow formal notation to be entered in the class diagram text fields. Rose scripts were developed to transform the resulting extended Rose model into Z (zed) specifications in LATEX format. Z specifications are developed for the object model, dynamic model, and functional model based on information gathered from the class diagram and state transition diagram of the Rose model. These specifications can then be parsed into a tool supporting formal methods and Ada code can be automatically generated.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"5 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":"128532424","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.2000.894916
D. Kong, J. Chun
Many direction of arrival (DOA) tracking algorithms suffer heavy computational complexity due to their dependence on the sample covariance matrix. We propose a new DOA tracking algorithm that uses the extended Kalman filter (EKF). Because the proposed algorithm is based on a single snapshot, it requires low computational complexity. Our simulation illustrates that the proposed algorithm performs better than other methods.
{"title":"A fast DOA tracking algorithm based on the extended Kalman filter","authors":"D. Kong, J. Chun","doi":"10.1109/NAECON.2000.894916","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894916","url":null,"abstract":"Many direction of arrival (DOA) tracking algorithms suffer heavy computational complexity due to their dependence on the sample covariance matrix. We propose a new DOA tracking algorithm that uses the extended Kalman filter (EKF). Because the proposed algorithm is based on a single snapshot, it requires low computational complexity. Our simulation illustrates that the proposed algorithm performs better than other methods.","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":"128842235","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.2000.894915
M. Fowler
An effective way to locate RF transmitters is to measure the time-difference-of-arrival (TDOA) and the frequency-difference-of-arrival (FDOA) between pairs of signals received at geographically separated sites, but this requires that samples of one of the signals be sent over a data link. Often the available data link rate is insufficient to accomplish the transfer in a timely manner unless some form of lossy data compression is employed. A common approach in data compression is to pursue a rate-distortion criterion, where distortion is the mean-square error (MSE) due to compression. This paper shows that this MSE-only approach is inappropriate for TDOA/FDOA estimation and defines a more appropriate, non-MSE distortion measure. This measure is based on the fact that in addition to the inverse dependence on SNR, the TDOA accuracy also depends inversely on the signal's RMS (or Gabor) bandwidth and the FDOA accuracy also depends inversely on the signal's RMS (or Gabor) duration. The paper discusses how the wavelet transform can be used to exploit this measure.
{"title":"Exploiting RMS time-frequency structure for data compression in emitter location systems","authors":"M. Fowler","doi":"10.1109/NAECON.2000.894915","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894915","url":null,"abstract":"An effective way to locate RF transmitters is to measure the time-difference-of-arrival (TDOA) and the frequency-difference-of-arrival (FDOA) between pairs of signals received at geographically separated sites, but this requires that samples of one of the signals be sent over a data link. Often the available data link rate is insufficient to accomplish the transfer in a timely manner unless some form of lossy data compression is employed. A common approach in data compression is to pursue a rate-distortion criterion, where distortion is the mean-square error (MSE) due to compression. This paper shows that this MSE-only approach is inappropriate for TDOA/FDOA estimation and defines a more appropriate, non-MSE distortion measure. This measure is based on the fact that in addition to the inverse dependence on SNR, the TDOA accuracy also depends inversely on the signal's RMS (or Gabor) bandwidth and the FDOA accuracy also depends inversely on the signal's RMS (or Gabor) duration. The paper discusses how the wavelet transform can be used to exploit this measure.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"210 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":"114315923","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.2000.894930
J. Song, Jang-Gyu Lee, T. Kang, S. Sung
In this paper, a single DOF in-plane gimbaled silicon gyroscope and capacitive detection circuits are designed, fabricated and experimented. The operational principles of a vibrating silicon gyroscope and in-plane gimbaled silicon gyroscope are explained, and the differences between them are described. Because the latter has inner and outer gimbals separately, the driving and sensing mode is almost decoupled mechanically, which results in performance enhancement. The model equations of the in-plane gimbaled gyroscope are derived. Capacitive detection method with two anti-phase driving signals is used to measure the variation of capacitance. Moreover, two anti-phase carrier signals are added in order to reduce driving and measurement noises and to achieve linear relationship between applied angular rate and sensing output. Through experiments, it is confirmed that the proposed gyroscope and detection circuits have good linear property, resolution and sensitivity, contributing to the performance improvement of a silicon gyroscope.
{"title":"Design and performance test of an in-plane gimbaled silicon gyroscope","authors":"J. Song, Jang-Gyu Lee, T. Kang, S. Sung","doi":"10.1109/NAECON.2000.894930","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894930","url":null,"abstract":"In this paper, a single DOF in-plane gimbaled silicon gyroscope and capacitive detection circuits are designed, fabricated and experimented. The operational principles of a vibrating silicon gyroscope and in-plane gimbaled silicon gyroscope are explained, and the differences between them are described. Because the latter has inner and outer gimbals separately, the driving and sensing mode is almost decoupled mechanically, which results in performance enhancement. The model equations of the in-plane gimbaled gyroscope are derived. Capacitive detection method with two anti-phase driving signals is used to measure the variation of capacitance. Moreover, two anti-phase carrier signals are added in order to reduce driving and measurement noises and to achieve linear relationship between applied angular rate and sensing output. Through experiments, it is confirmed that the proposed gyroscope and detection circuits have good linear property, resolution and sensitivity, contributing to the performance improvement of a silicon gyroscope.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"12 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":"126509645","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.2000.894942
M. Alam, C. N. Wai
A fringe-adjusted joint-transform correlator (JTC) based technique for improved color pattern recognition is introduced. In the proposed technique, a real-valued filter, called the fringe-adjusted filter is used to reshape the joint power spectrum in order to yield better correlation output. A color image is processed through three channels, and the fringe-adjusted filtering is applied to each of these channels to obtain excellent correlation discrimination. The correlation outputs from these channels are then fused together to achieve a decision on the detection of a given color pattern. It is also shown that the fringe-adjusted filtering can be applied to a multichannel single-output JTC to obtain excellent correlation output that represents the coherence level between the input target image and the reference image for all color channels. These two techniques can be easily implemented in real time as for practical color pattern recognition applications. Two architectures for all-optical implementation of the proposed techniques are presented.
{"title":"Color pattern recognition using fringe-adjusted joint transform correlation","authors":"M. Alam, C. N. Wai","doi":"10.1109/NAECON.2000.894942","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894942","url":null,"abstract":"A fringe-adjusted joint-transform correlator (JTC) based technique for improved color pattern recognition is introduced. In the proposed technique, a real-valued filter, called the fringe-adjusted filter is used to reshape the joint power spectrum in order to yield better correlation output. A color image is processed through three channels, and the fringe-adjusted filtering is applied to each of these channels to obtain excellent correlation discrimination. The correlation outputs from these channels are then fused together to achieve a decision on the detection of a given color pattern. It is also shown that the fringe-adjusted filtering can be applied to a multichannel single-output JTC to obtain excellent correlation output that represents the coherence level between the input target image and the reference image for all color channels. These two techniques can be easily implemented in real time as for practical color pattern recognition applications. Two architectures for all-optical implementation of the proposed techniques are presented.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"1 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":"128981854","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.2000.894971
P. Whittaker, M.S. Hodgart
A history of in-orbit operation of fifteen low Earth orbit (LEO) satellites by the Surrey Space Centre has highlighted the usefulness to the civilian market of measuring and analysing the crowded RF spectrum from the LEO perspective. A desirable instrument would be a payload that performs spectral analysis of a wide frequency range rapidly and to a useful resolution, while combining a capability for further time domain analysis of particular signals. A conventional system architecture adopts a channelised approach, sampling and processing each channel in turn over some repetition period. Here, the authors propose a novel sweeping system which provides a more elegant and possibly more efficient solution. Digital chirp filter processing can be employed to achieve suitable resolution spectral analysis. An explanation of the operation of a sweeping system, including chirp filter spectral analysis, is presented along with a comparison with a channelised approach.
{"title":"Small satellite SIGINT payload","authors":"P. Whittaker, M.S. Hodgart","doi":"10.1109/NAECON.2000.894971","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894971","url":null,"abstract":"A history of in-orbit operation of fifteen low Earth orbit (LEO) satellites by the Surrey Space Centre has highlighted the usefulness to the civilian market of measuring and analysing the crowded RF spectrum from the LEO perspective. A desirable instrument would be a payload that performs spectral analysis of a wide frequency range rapidly and to a useful resolution, while combining a capability for further time domain analysis of particular signals. A conventional system architecture adopts a channelised approach, sampling and processing each channel in turn over some repetition period. Here, the authors propose a novel sweeping system which provides a more elegant and possibly more efficient solution. Digital chirp filter processing can be employed to achieve suitable resolution spectral analysis. An explanation of the operation of a sweeping system, including chirp filter spectral analysis, is presented along with a comparison with a channelised approach.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"5 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":"127802347","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.2000.894957
Charles Cerny, R. Blumgold, J. Cook, S. Bibyk, J. Fisher, R. Siferd, S. Ren
An important aspect in developing digital receivers is the reduction of analog components, which tend to be temperature sensitive and require calibration and result in a reduction in receiver accuracy. Digital receivers are a long-term goal of the Air Force, which strive for increased functionality interactive capability amongst air, space and ground based platforms. Therefore, in the proper designing of that digital receiver an intricate tradespace exists in order to maintain the power performance relationship needed to meet platform requirements, and reducing acquisition and lifecycle costs. This paper summarizes efforts to completely analyze two complementary enhancement-mode technologies, GaAs CHFET and SOI CMOS, which could be implemented at the front end of the digital receiver and result in an appropriate power/performance improvement. This effort begins with a detailed radio frequency (RF) characterization of each technology, the building of a complete RF model, and the correct choice of enhancement-mode, high performance mixed-signal circuit designs. This type of ground level approach is critical to any future digital receiver architecture where platform power budget constraints must be met, while producing the maximum performance.
{"title":"Detailed analysis of enhancement-mode technologies for the development of high performance, power conserving, mixed-signal integrated circuits","authors":"Charles Cerny, R. Blumgold, J. Cook, S. Bibyk, J. Fisher, R. Siferd, S. Ren","doi":"10.1109/NAECON.2000.894957","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894957","url":null,"abstract":"An important aspect in developing digital receivers is the reduction of analog components, which tend to be temperature sensitive and require calibration and result in a reduction in receiver accuracy. Digital receivers are a long-term goal of the Air Force, which strive for increased functionality interactive capability amongst air, space and ground based platforms. Therefore, in the proper designing of that digital receiver an intricate tradespace exists in order to maintain the power performance relationship needed to meet platform requirements, and reducing acquisition and lifecycle costs. This paper summarizes efforts to completely analyze two complementary enhancement-mode technologies, GaAs CHFET and SOI CMOS, which could be implemented at the front end of the digital receiver and result in an appropriate power/performance improvement. This effort begins with a detailed radio frequency (RF) characterization of each technology, the building of a complete RF model, and the correct choice of enhancement-mode, high performance mixed-signal circuit designs. This type of ground level approach is critical to any future digital receiver architecture where platform power budget constraints must be met, while producing the maximum performance.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"46 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":"132325403","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.2000.894918
Kyungsup Kim, Soohong Kim, J. Bae, J. Chun
An H/sup /spl infin// optimized equalizer is presented to realize an optimal causal and stable equalizer of the single-channel equalization problem in the frequency domain. The proposed algorithm achieves intersymbol interference cancellation and noise attenuation in the view point of H/sup /spl infin// optimization. The communication system usually suffers some uncertainties of the channel parameter and the statistics of noise. Our algorithm is robust while the channel characteristics and the statistics of inputs and external. Noise are uncertain with a bound. Moreover, while the conventional H/sup /spl infin// approach is to minimize a peak error gain over the entire range, we propose a modified H/sup /spl infin// equalizer to emphasize the limited used frequency region by using a weight function. Finally, for the purpose of illustration, some examples and their simulation results are presented.
{"title":"Comparison of the channel equalizers using the inverse filter, the H/sup 2/ filter and the H/sup /spl infin// filter","authors":"Kyungsup Kim, Soohong Kim, J. Bae, J. Chun","doi":"10.1109/NAECON.2000.894918","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894918","url":null,"abstract":"An H/sup /spl infin// optimized equalizer is presented to realize an optimal causal and stable equalizer of the single-channel equalization problem in the frequency domain. The proposed algorithm achieves intersymbol interference cancellation and noise attenuation in the view point of H/sup /spl infin// optimization. The communication system usually suffers some uncertainties of the channel parameter and the statistics of noise. Our algorithm is robust while the channel characteristics and the statistics of inputs and external. Noise are uncertain with a bound. Moreover, while the conventional H/sup /spl infin// approach is to minimize a peak error gain over the entire range, we propose a modified H/sup /spl infin// equalizer to emphasize the limited used frequency region by using a weight function. Finally, for the purpose of illustration, some examples and their simulation results are presented.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"1 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":"130489324","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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