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Performance study of some diversity schemes in a Nakagami fading channel
Title
Performance study of some diversity schemes in a Nakagami fading channel.
Creator
Sannegowda, Ramesh Panditan., Florida Atlantic University, Aalo, Valentine A., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
Closed form results for the symbol error probabilities are derived for M-ary, L branch Selection diversity schemes and Partial Decision combining schemes in a Nakagami fading environment using noncoherent frequency-shift keying modulation. The Maximum SNR selection, the Maximum output selection, the Optimal partial decision, and the Majority voting schemes are considered in this analysis. The analysis is not limited to integer values of the Nakagami fading parameter m. Results for the...
Show moreClosed form results for the symbol error probabilities are derived for M-ary, L branch Selection diversity schemes and Partial Decision combining schemes in a Nakagami fading environment using noncoherent frequency-shift keying modulation. The Maximum SNR selection, the Maximum output selection, the Optimal partial decision, and the Majority voting schemes are considered in this analysis. The analysis is not limited to integer values of the Nakagami fading parameter m. Results for the Rayleigh fading channel are obtained and presented as special cases of those of the Nakagami fading model. The symbol error probability when the diversity branches undergo different fading statistics with unequal mean SNR are considered for the Maximum SNR selection scheme. Outage probabilities are also calculated for some of the diversity combining schemes. A comparison of all the four schemes are discussed using the performance curves.
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Date Issued
1994
PURL
http://purl.flvc.org/fcla/dt/15011
Subject Headings
Electromagnetic waves--Transmission, Radio--Transmitters and transmission--Fading, Radio waves--Scattering
Format
Document (PDF)
Detection of direct-sequence spread-spectrum signals in a multipath fading environment
Title
Detection of direct-sequence spread-spectrum signals in a multipath fading environment.
Creator
Jodoin, Claude., Florida Atlantic University, Aalo, Valentine A.
Abstract/Description
In this thesis, we study the effect of Rice fading on the performance of Global Positioning System (GPS) receivers. The field-theoretic foundation of pseudo-random-noise (PRN) codes, their implementation, and their use in generating unique navigation messages in the GPS receiver is reviewed. The processing of the spread-spectrum signals within the digital delay locked loop (DDLL) in the receiver is also considered. In particular, we derive numerical expressions that can be easily evaluated...
Show moreIn this thesis, we study the effect of Rice fading on the performance of Global Positioning System (GPS) receivers. The field-theoretic foundation of pseudo-random-noise (PRN) codes, their implementation, and their use in generating unique navigation messages in the GPS receiver is reviewed. The processing of the spread-spectrum signals within the digital delay locked loop (DDLL) in the receiver is also considered. In particular, we derive numerical expressions that can be easily evaluated for the probability error and the mean-time to lose-lock, for a DDL operating in an additive white gaussian noise (AWGN) channel in the presence of Rice fading. The results obtained generalize results in the literature for the Rayleigh fading environment.
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Date Issued
1999
PURL
http://purl.flvc.org/fcla/dt/15712
Subject Headings
Global Positioning System, Radio--Transmitters and transmission--Fading, Spread spectrum communications
Format
Document (PDF)
Performance studies on digital cellular radio systems operating in a non-Gaussian multipath fading environment
Title
Performance studies on digital cellular radio systems operating in a non-Gaussian multipath fading environment.
Creator
Chayawan, Chirasil., Florida Atlantic University, Aalo, Valentine A., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
This dissertation is concerned with studies on the performance aspects of digital cellular radio systems operating in non-Gaussian multipath fading environments. The multipath fading channel, modeled as a superposition of sinusoidal random vectors, is the main focus of this work. Elementary phase distributions, which cause quadrature components of the composite received vector to be correlated, are studied and relevant envelope distribution for the resulting non-Gaussian quadrature components...
Show moreThis dissertation is concerned with studies on the performance aspects of digital cellular radio systems operating in non-Gaussian multipath fading environments. The multipath fading channel, modeled as a superposition of sinusoidal random vectors, is the main focus of this work. Elementary phase distributions, which cause quadrature components of the composite received vector to be correlated, are studied and relevant envelope distribution for the resulting non-Gaussian quadrature components is investigated. The Student-t distributed random process is chosen to model the quadrature components in an indoor multipath fading channel when the number of sinusoidal random vectors is small. For the correlated bivariate non-Gaussian quadrature components, the exact probability distribution function, corresponding to those elementary phase distributions as well as the Gaussian approximation for resultant envelope are evaluated. The scenario where the elementary envelope is beta distributed is also considered. Spherically invariant random process (SIRP) is also used to model the multipath fading channel. The performance analysis based on the spherically invariant multipath fading channel, is then evaluated. The system performance, specified in terms of outage probability and average error probability, significantly depends on the choice of characteristic probability distribution function of the random process that describes the RF ambient. It is shown that the optimality of the optimum combining and maximal ratio combining schemes in interference-limited environments is still retained under the spherically invariant multipath fading channel model.
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Date Issued
2002
PURL
http://purl.flvc.org/fau/fd/FADT12011
Subject Headings
Cellular telephone systems, Digital communications, Radio--Transmitters and transmission--Fading, Gaussian processes
Format
Document (PDF)
Performance of multicarrier DS CDMA systems in a Nakagami fading channel
Title
Performance of multicarrier DS CDMA systems in a Nakagami fading channel.
Creator
Wang, Jifang., Florida Atlantic University, Bagby, Jonathan S., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
The performance of a multicarrier DS CDMA system is evaluated over a Nakagami multipath fading channel. After the spreading process, the data sequence is applied to multiple carrier rather than a single carrier. Each carrier is provided a corralator in the receiver, and the maximal-ratio combiner is used for the corralator outputs. A bandlimited spreading waveforms are used for self-interference prevention. Robustness to multipath fading and narrow band interference suppression are achieved...
Show moreThe performance of a multicarrier DS CDMA system is evaluated over a Nakagami multipath fading channel. After the spreading process, the data sequence is applied to multiple carrier rather than a single carrier. Each carrier is provided a corralator in the receiver, and the maximal-ratio combiner is used for the corralator outputs. A bandlimited spreading waveforms are used for self-interference prevention. Robustness to multipath fading and narrow band interference suppression are achieved by this type of configuration. A comparison is made with a single carrier system in the presence of interference.
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Date Issued
1998
PURL
http://purl.flvc.org/fcla/dt/15534
Subject Headings
Code division multiple access, Wireless communication systems, Radio--Transmitters and transmission--Fading
Format
Document (PDF)
Visualization as a Qualitative Method for Analysis of Data from Location Tracking Technologies
Title
Visualization as a Qualitative Method for Analysis of Data from Location Tracking Technologies.
Creator
Mani, Mohan, VanHilst, Michael, Pandya, Abhijit S., Hsu, Sam, Florida Atlantic University, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
One of the biggest factors in the quest to better wireless communication is cellular call handoff, which in tum, is a function of geographic location. In this thesis, our fundamental goal was to demonstrate the value addition brought forth by spatial data visualization techniques for the analysis of geo-referenced data from two different location tracking technologies: GPS and cellular systems. Through our efforts, we unearthed some valuable and surprising insights from the data being...
Show moreOne of the biggest factors in the quest to better wireless communication is cellular call handoff, which in tum, is a function of geographic location. In this thesis, our fundamental goal was to demonstrate the value addition brought forth by spatial data visualization techniques for the analysis of geo-referenced data from two different location tracking technologies: GPS and cellular systems. Through our efforts, we unearthed some valuable and surprising insights from the data being analyzed that led to interesting observations about the data itself as opposed to the entity, or entities, that the data is supposed to describe. In doing so, we underscored the value addition brought forth by spatial data visualization techniques even in the incipient stages of analysis of georeferenced data from cellular networks. We also demonstrated the value of visualization techniques as a verification tool to verify the results of analysis done through other methods, such as statistical analysis.
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Date Issued
2008
PURL
http://purl.flvc.org/fau/fd/FA00012536
Subject Headings
Mobile communication systems, Algorithms--Data analysis, Radio--Transmitters and transmissions, Code division multiple access
Format
Document (PDF)
Matched filter bound for frequency-selective Nakagami fading channel
Title
Matched filter bound for frequency-selective Nakagami fading channel.
Creator
Jiao, Jiemei., Florida Atlantic University, Aalo, Valentine A.
Abstract/Description
Based on the theoretical method developed by Clark and Greenstein for frequency-selective Rayleigh fading channel, we develop a general model for frequency-selective Nakagami fading channel. We derive analytical expressions of the average bit-error-rate in an ideal space diversity mobile radio receiver using the matched filter bound. Our simulation results show that the influences of the diversity order, the shape of the multipath delay profile, and delay spread of the multipath delay profile...
Show moreBased on the theoretical method developed by Clark and Greenstein for frequency-selective Rayleigh fading channel, we develop a general model for frequency-selective Nakagami fading channel. We derive analytical expressions of the average bit-error-rate in an ideal space diversity mobile radio receiver using the matched filter bound. Our simulation results show that the influences of the diversity order, the shape of the multipath delay profile, and delay spread of the multipath delay profile. Five shapes are considered in our simulation. Our simulation results highlight the importance of the ratio the normalized delay spread d. The results show that the delay profile is of no importance for $d<0.3,$ but can have a profound influence for $d\geq0.3.$
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Date Issued
1995
PURL
http://purl.flvc.org/fcla/dt/15223
Subject Headings
Digital communications, Signal processing--Digital techniques, Radio--Transmitters and transmission--Fading
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)