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 68 for “"Forward Error Correction"”.
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Efficient forward error correction coding technique for spread spectrum communications
… technique and the simulation results for the Forward Error Correction (FEC) of the wireless data in a highly noisy and severe fading wireless medium, based on standard (IEEE 802.11 Wireless Local Area Network specification) and GPS driven non-standard MAC schemes. The design and testing of …
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The application of forward error correction techniques in wireless ATM
… of this thesis, titled "The Application of Forward Error Correction Techniques in Wireless ATM' is to examine the feasibility of using forward error correction techniques to improve the perceived channel characteristics to the extent that the channel becomes transparent to the higher layers …
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Development of system for teaching turbo code forward error correction techniques
Submitted for Masters of Technology: Electronic Engineering, Durban University of Technology, Durban, South Africa, 2007.
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Combined forward error correction and error concealment for digital video transmission
Forward Error Correction (FEC) coding has been widely used in digital communications to improve the transmission performance over noisy channels. Based on the introduced redundancy and encoding structure, a maximum likelihood (ML) decoding scheme can be used to correct significant part of …
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Iterative decoding for rate adaptive forward error correction on the mobile satellite channel.
In this thesis, we examine rate adaptive forward error correction codes for the mobile satellite channel. We are especially interested in codes that can be iteratively decoded. Multilevel coded modulations are considered: partitioning of constellations, coding principle and iterative decoding are …
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An adaptive and reliable forward error correction mechanism for real-time video delivery from UAVs
This thesis introduces the Adaptive and Reliable Forward Error Correction (AR-FEC) mechanism, an advanced protocol designed to enhance real-time video transmission in Unmanned Aerial Vehicles (UAVs) communications. Addressing the challenge of unreliable wireless channels, AR-FEC leverages edge …
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FPGA-based architectures for next generation communications networks
… important paradigms in contemporary networking - Forward Error Correction and Packet Classification. The work seeks to combine analysis of the underlying algorithms and mathematical techniques which drive these applications, with an informed approach to the design of efficient FPGA-based circuits.
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A Hardware Implementation of a Coherent SOQPSK-TG Demodulator for FEC Applications
… telemetry group version (SOQPSK-TG) for use in forward error correction (FEC) applications. Implementation details for data sequence detection, symbol timing synchronization, carrier phase synchronization, and block recovery are described. This decision-directed demodulator is based on maximum …
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Congestion-resilient TCP
… to TCP that makes use of extra bandwidth to do forward error correction using the exclusive-or binary operation. We implement this XOR-Packets enhancement in the FreeBSD network stack and show that it guarantees the ability to reconstruct any single packet loss without the need for …
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Hybrid Channel Coding for Error-Sensitive Class on DS-CDMA Air Interface
… ARQ (Automatic-Repeat-reQuest) protocol and FEC (Forward Error Correction) scheme that can reduce the error rate significantly. Each of ARQ protocol and FEC scheme gives rise to long latency and significant complexity, respectively, for obtaining the required QoS (Quality of Service). This thesis …
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Scalable and Reliable File Transfer for Clusters Using Multicast.
… and Reliable File Transfer Tool (SRFTT), uses Forward Error Correction (FEC) and multiple multicast channels to achieve an efficient reliable file transfer, relative to heterogeneous clusters. SRFTT achieves scalability by avoiding feedback from the receivers. Tests show that, for large files, …
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A Novel Diversity Technique to Improve the Channel Coding Performance in Wireless Communications
… the wireless communication performance is Forward Error Correction (FEC) codes. The investment of FEC requires either the channel bandwidth to be increased or the transmission rate to be decreased. Thus, it is necessary to keep a high rate of transmission, but not at the cost of extra …
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Soft Processing Techniques for Quantum Key Distribution Applications
… The core ideas of the thesis are employing Forward Error Correction (FEC) coding as opposed to two-way communication for information reconciliation in QKD schemes, exploiting all the available information for data processing at the receiver including information available from the quantum …
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A comparison of two novel channel coding techniques for CDMA
In Code Division Multiple Access (CDMA) systems forward error correction (FEC) is an important factor in improving system performance. Because of the multiple access interference observed in asynchronous CDMA, FEC is required to improve system capacity. Several alternative coding techniques are …
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Artificial neural network decoding of multi-h CPM
… (CPM) schemes. Multi-h CPM schemes offer forward error correction (FEC) capabilities for continuous transmission, digital communication systems. Multi-h CPM is reported to be a bandwidth efficient alternative to other FEC techniques such as convolutional coding, while neural networks allow …
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Opportunistic routing in multi-hop wireless networks
… the broadcast nature of radios by making forwarding decisions based on which nodes receive each transmission. The spatial diversity among receivers provides each transmission multiple opportunities to make progress in the face of packet losses. As a result ExOR can use long links with high …
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A Study into the Tradeoffs Between TDM / MF-SCPC and TDM / MF-TDMA Transport Options to Support IP-Based Multimedia Applications Under Different Load Conditions Within a Point-to-Multipoint Satellite Network
… are next followed by a detailed description of Forward Error Correction (FEC) techniques and a discussion on network-wide tradeoffs so selecting different options. The thesis then presents the results of a real-life scenario, investigating both TDM / MF-SCPC and TDM / MF-TDMA media access …
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Adaptive, Turbo-coded OFDM
… suitable for high data rate transmission with forward error correction (FEC) methods over wireless channels. In this thesis, we enhance the system throughput of a working OFDM system by adding turbo coding and adaptive modulation (AD). Simulation is done over a time varying, frequency selective …
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Quality of Experience Enhancement Architecture For Video Delivery On WiFi
… algorithm in conjunction with Application Layer Forward Error Correction (AL-FEC) to improve air efficiency. This research utilizes a mathematical model which considers the reduced video resolution during impairments, and effects of stalled video, on the QoE. To reduce the effects of …
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