Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 46 for “"PROBABILITY OF ERROR"”.
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The Performance of Direct-Sequence Spread-Spectrum Communications With Selective Fading Channels and Rake Reception
The performance of a direct-sequence spread-spectrum communication system is evaluated for selective fading channels and rake reception. Several issues are examined that influence the probability of error of the system, and closed-form expressions are obtained for the probability of error. The …
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Designing hypothesis tests for digital image matching
… must decide whether they represent two views of the same scene, or views of two different scens. Previous solutions to this problem were either based on an intuitive notion of image similarity, or were modelled on solutions to the superficially similar problem of target detection in images. …
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Error-rates of digital signaling with coherent and noncoherent detections
Theoretical analysis and comparison of three basic digital data communication systems, namely, amplitude-shift keying (ASK), frequency-shift keying (FSK), and phase-shift keying (PSK), for both binary coded and M-ary coded transmissions are presented in this paper. The analysis is limited to only …
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Limits to extreme event forecasting in chaotic systems
… by rare but intensely fluctuating properties, is of great importance due to their impact on the performance and reliability of a wide range of systems. Some examples include weather forecasting, traffic management, power grid operations, and financial market analysis, to name a few. Methods of …
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On Communication Over Correlated Fading Channels With Practical Power Constraints
… and Biglieri presented a detailed analysis of bit-interleaved coded modulation (BICM), a simple and popular technique used to improve system performance, especially in the context of fading channels. They derived an upper bound to the probability of error, called the expurgated bound. Here, …
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Diversity Combining for Frequency-Hop Spread-Spectrum Communications With Partial-Band Interference and Fading (anti-Jam)
This thesis presents results on the evaluation of several diversity combining techniques that are suggested for frequency-hop (FH) communications with partial-band interference and fading. The analysis covers systems with M -ary orthogonal signaling and noncoherent demodulation. The partial-band …
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Effects of Cross-Correlation Interference on an Optical Code Division Multiple Access Communication System
The effects of cross-correlation interference and intensity fading on the error rate performance of an optical code division multiple access communication system are investigated. The system model is a multiaccess satellite repeater in which user separation is accomplished by direct sequence …
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Sequence Synchronisation in Chaos-based Direct Sequence Spread Spectrum Communication Systems
… investigation into the modelling and performance of sequence synchronisation in Chaos-based Direct Sequence Spread Spectrum (CDS-SS) communication systems with the aims of identifying the existing gaps in research and suggesting a new and accurate modelling approach. The CDS-SS systems offer …
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Better Teaching Model? Middle School Science Classroom Using the 4MAT Instructional Strategy vs. Lessons Created Without this Model
… to meet expectations set in Goals 2000. The use of the 4MAT Instructional Method was investigated as a possible method for attainment of current science standards. The study included one middle school science instructor's classes with 89 participating students. Measurements were taken and …
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An FPGA-Based Multiuser Receiver Employing Parallel Interference Cancellation
… cellular system can be increased through the use of digital signal processing techniques that exploit the nature of the multiple access interference (MAI). By jointly demodulating the users in the system, this interference can be characterized and reduced thus decreasing the overall probability of …
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Error exponents for multipath fading channels : a strong coding theorem
We derive upper and lower bounds on the probability of error (the exponents of which are the error exponents) with "peaky" signaling -- the signaling strategy that achieves the capacity of the multipath fading channel under an average power constraint in the limit of infinite bandwidth. These …
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Performance analysis of CDMA systems in multipath channels
This thesis provides a performance analysis of Code Division Multiple Access (COMA) systems in non-ideal conditions. Two benefits of CDMA include resistance to multipath fading and graceful performance degradation in the presence of multiple access interference. These benefits have made CDMA …
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Coding for random access in wireless networks
… in the near future face a formidable challenge of accommodating a dense set of infrequently communicating devices characterized by small data payloads and strict latency and energy constraints. In such a scenario, providing energy efficient random-access access becomes a challenge. Information …
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Statistical Methods of Bit Error Rate Estimation in Optical Communication Systems
This thesis describes two methods of bit error rate (BER) estimation based on statistical techniques. The first method examines the correlation between the BER and electrical characteristics of an optical receiver circuit. Low correlation is found between the receiver performance and the electrical …
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Target detection through quantum illumination
Classical target detection can suffer large error probabilities in noisy and lossy environments when noise photons are mistaken for signal photons reflected from an object. It has been shown theoretically that the correlation between entangled photons can be used to better discriminate between the …
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Ofdm system cyclic prefix characteristic analaysis for wimax technology
… Communication System are involved in every part of life. Worldwide Interoperability for Microwave Access (WIMAX) system based on Orthogonal Frequency Division Multiplexing (OFDM) with different adaptive modulation techniques is currently the topic of discussion.WIMAX is the next generation of …
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Mismatched Decoding: Capacity and Error Exponent Upper Bounds
… problems in information theory such as zero-error capacity or erasures-only capacity can be cast as instances of mismatched decoding. In the mismatched decoding problem, the optimal maximum-likelihood decoder is replaced by a maximum metric decoder, where the metric is not necessarily the …
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Oblivious data hiding : a practical approach
This dissertation presents an in-depth study of oblivious data hiding with the emphasis on quantization based schemes. Three main issues are specifically addressed: 1. Theoretical and practical aspects of embedder-detector design. 2. Performance evaluation, and analysis of performance vs. …
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EFFICIENT APPROACHES FOR QUBIT MAPPING ON NISQ COMPUTERS
… However, the practical implementation of quantum algorithms remains a significant challenge due to the error-prone and hardware limits of near-term quantum devices. For instance, physical qubit connections are limited, which necessitates the use of quantum SWAP gates to dynamically …
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