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DIGITAL PCM MF RECEIVER
Title
DIGITAL PCM MF RECEIVER.
Creator
CHENTHANAKIJ, APICHAI., Florida Atlantic University, Shankar, Ravi
Abstract/Description
A PCM MF Receiver based on either analog or digital filters results in a fairly large chip. A recent publication attempts to address this issue by using certain approximations that replace multiplications with simple additions and subtractions. This results in a significantly smaller chip. In our research, we have further refined/changed the algorithms and approximations in order to reduce the chip size further and the chip count to one. A simulation model corresponding to this, written in...
Show moreA PCM MF Receiver based on either analog or digital filters results in a fairly large chip. A recent publication attempts to address this issue by using certain approximations that replace multiplications with simple additions and subtractions. This results in a significantly smaller chip. In our research, we have further refined/changed the algorithms and approximations in order to reduce the chip size further and the chip count to one. A simulation model corresponding to this, written in ISPS and Fortran, was extensively utilized to verify that the proposed receiver would meet and/or exceed all the commercial specifications. Subsequent to that, we initiated hardware design using structured methodologies. Hardware modules written in a high-level hardware description language have been simulated for functional validity. We expect to utilize mixed mode simulations and hierarchical design concepts in translating this high-level description to a hardware implementation on a semi-custom CMOS chip.
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Date Issued
1987
PURL
http://purl.flvc.org/fcla/dt/14354
Subject Headings
Electric filters, Digital--Computer programs, Telephone
Format
Document (PDF)
Mismatch cancellation in quadrature bandpass delta-sigma modulators using an error shaping technique
Title
Mismatch cancellation in quadrature bandpass delta-sigma modulators using an error shaping technique.
Creator
Riches, James John., Florida Atlantic University, Erdol, Nurgun, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
Techniques for shaping component mismatch error in the real and imaginary paths of a complex (quadrature) delta-sigma are studied, simulated and compared to existing techniques. Complex bandpass delta-sigma modulators provide improved performance over a pair of real bandpass delta-sigma modulators of the same order in the conversion of narrow-band quadrature IF (intermediate frequency) signals. This is possible due to elimination of redundant conjugate pairs of poles and zeros in its noise...
Show moreTechniques for shaping component mismatch error in the real and imaginary paths of a complex (quadrature) delta-sigma are studied, simulated and compared to existing techniques. Complex bandpass delta-sigma modulators provide improved performance over a pair of real bandpass delta-sigma modulators of the same order in the conversion of narrow-band quadrature IF (intermediate frequency) signals. This is possible due to elimination of redundant conjugate pairs of poles and zeros in its noise and signal transfer function. Mismatches in the modulators real and imaginary paths, however, results in spectral leakage of image band interference and image band quantization noise to the passband of the converted output. Strategic pole-zero placement, as well as adaptive techniques have been studied in earlier works. This thesis will take advantage of the inherent dual paths of the complex bandpass delta-sigma modulator to reduce component mismatch effects using a switched capacitor error shaping technique.
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Date Issued
2000
PURL
http://purl.flvc.org/fcla/dt/15783
Subject Headings
Digital-to-analog converters, Modulators (Electronics), Electric filters, Bandpass
Format
Document (PDF)
Identification and approximation of one-dimensional and two-dimensional digital filters
Title
Identification and approximation of one-dimensional and two-dimensional digital filters.
Creator
Wang, Dali., Florida Atlantic University, Zilouchian, Ali, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
In this dissertation, identification and approximation of one-dimensional (1-D) and two-dimensional (2-D) recursive digital filters are addressed. In the identification phase, a novel Neural Network (NN) structure is proposed which provides the state-space model of 1-D filters based upon input-output data. The state space identification technique is also extended to 2-D digital filters and several comparison studies are performed. In the approximation phase, frequency-domain balanced...
Show moreIn this dissertation, identification and approximation of one-dimensional (1-D) and two-dimensional (2-D) recursive digital filters are addressed. In the identification phase, a novel Neural Network (NN) structure is proposed which provides the state-space model of 1-D filters based upon input-output data. The state space identification technique is also extended to 2-D digital filters and several comparison studies are performed. In the approximation phase, frequency-domain balanced structures for 1-D as well as 2-D digital filters are proposed. The model reduction technique is based on the conceptual view point of balancing the controllability and observability Grammians of a digital filter in an arbitrary frequency range of operation. Finally, the interrelations between these two phases are presented. Extensive simulation experiments are presented to demonstrate the effectiveness of proposed methods.
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Date Issued
1998
PURL
http://purl.flvc.org/fcla/dt/12555
Subject Headings
Digital filters (Mathematics), Signal processing--Digital technique, Electric filters, Digital
Format
Document (PDF)
Discrete digital filter design for microelectromechanical systems (MEMS) accelerometers and gyroscopes
Title
Discrete digital filter design for microelectromechanical systems (MEMS) accelerometers and gyroscopes.
Creator
Martin, Madison E., Harriet L. Wilkes Honors College
Abstract/Description
Microelectromechanical systems (MEMS) accelerometers and gyroscopes are small scale sensors that measure changes in linear acceleration and rotational velocity, respectively. They are fabricated using electronic circuit techniques such as etching and deposition. MEMS motion sensors can be used in an Inertial Measurement Unit (IMU) that can be integrated with the Global Positioning System (GPS) to make a navigation system that is more accurate than each system alone. However, since MEMS-based...
Show moreMicroelectromechanical systems (MEMS) accelerometers and gyroscopes are small scale sensors that measure changes in linear acceleration and rotational velocity, respectively. They are fabricated using electronic circuit techniques such as etching and deposition. MEMS motion sensors can be used in an Inertial Measurement Unit (IMU) that can be integrated with the Global Positioning System (GPS) to make a navigation system that is more accurate than each system alone. However, since MEMS-based IMUs are inherently noisy, we must overcome inaccuracies caused by the integration of random noise to find position. Accuracy can be increased by applying digital filters to the data before integration. Comparing the success of finite impulse response (FIR) filters and infinite impulse response (IIR) filters, we found that even though our highest order FIR filter yielded the most accurate position, it was limited by an offset bias in the accelerometer signal and a time delay in the determined position.
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Date Issued
2010
PURL
http://purl.flvc.org/FAU/3335110
Subject Headings
Microelectromechanical systems, Design and construction, Signal processing, Digital techniques, Electric filters, Digital, Design and construction
Format
Document (PDF)
Realization and implementation of separable-in-denominator two-dimensional digital filter
Title
Realization and implementation of separable-in-denominator two-dimensional digital filter.
Creator
Huang, Ziqiang., Florida Atlantic University, Zilouchian, Ali
Abstract/Description
In this thesis, a partial fraction expansion of a separable-in-denominator 2-D transfer function is given. Based on this expansion, several novel realizations of separable-in-denominator 2-D filter are provide. These realizations have the properties of highly parallel structure and improved throughput delay. The performance figures are given in the tables. A method of evaluation of quantization error of separable-in-denominator 2-D filter is also derived by using the residue method. Formulas...
Show moreIn this thesis, a partial fraction expansion of a separable-in-denominator 2-D transfer function is given. Based on this expansion, several novel realizations of separable-in-denominator 2-D filter are provide. These realizations have the properties of highly parallel structure and improved throughput delay. The performance figures are given in the tables. A method of evaluation of quantization error of separable-in-denominator 2-D filter is also derived by using the residue method. Formulas for calculation of roundoff noise of proposed structures are provided. Two programs which can be used to calculate the roundoff noise of proposed structure are listed in the Appendix. To run the programs, we need only to input the constant coefficients of expanded transfer function. At last, an optimal block realization of separable-in-denominator 2-D filter is discussed and the criterion for the absence of limit cycles for a second-order 2-D block is given.
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Date Issued
1992
PURL
http://purl.flvc.org/fcla/dt/14879
Subject Headings
Real-time data processing, Image processing--Digital techniques, Electric filters, Digital--Computer programs
Format
Document (PDF)
Communications for a tethered underwater submersible
Title
Communications for a tethered underwater submersible.
Creator
Vulih, S., Clayton, David L., Harbor Branch Oceanographic Institute
Date Issued
1980
PURL
http://purl.flvc.org/FCLA/DT/3183665
Subject Headings
Remote submersibles, Radio --Transmitters and transmission, Electric filters, Automatic control, Radio frequency modulation, Signal theory (Telecommunication), Sonar
Format
Document (PDF)
Implementation of digital filters with LabVIEW
Title
Implementation of digital filters with LabVIEW.
Creator
Landrin, Thomas., Florida Atlantic University, Zilouchian, Ali, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
In this thesis, realization and implementation of one-dimensional (1-D) and two-dimensional (2-D) recursive digital filters using LabVIEW are presented. A number of direct and state-space realizations for 1-D filters are implemented either as in general form or second-order modules. Implementation programs are provided and simulation results are presented to show the effectiveness of the proposed method. In addition, several realizations for 2-D separable-in-denominator filters are proposed....
Show moreIn this thesis, realization and implementation of one-dimensional (1-D) and two-dimensional (2-D) recursive digital filters using LabVIEW are presented. A number of direct and state-space realizations for 1-D filters are implemented either as in general form or second-order modules. Implementation programs are provided and simulation results are presented to show the effectiveness of the proposed method. In addition, several realizations for 2-D separable-in-denominator filters are proposed. These realizations have the properties of highly parallel structure and improved throughput delay. The performance as well as the implementation of 2-D filters using LabVIEW is also presented.
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Date Issued
2004
PURL
http://purl.flvc.org/fcla/dt/13183
Subject Headings
LabVIEW, Computer programming, Computer graphics, Electric filters, Digital--Design and construction, Recursive functions--Data processing, Signal processing--Digital techniques
Format
Document (PDF)