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.
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Showing 1 to 12 of 12 for “"Turbo decoder"”.
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On a turbo decoder design for low power dissipation
A new coding scheme called "turbo coding" has generated tremendous interest in channel coding of digital communication systems due to its high error correcting capability. Two key innovations in turbo coding are parallel concatenated encoding and iterative decoding. A soft-in soft-out component …
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Implementation of a Turbo Decoder on a Configurable Computing Platform
Turbo codes are a new class of codes that can achieve exceptional error performance and energy efficiency at low signal-to-noise ratios. Decoding turbo codes is a complicated procedure that often requires custom hardware if it is to be performed at acceptable speeds. Configurable computing machines …
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Implementation and Performance of an Improved Turbo Decoder on a Configurable Computing Machine
Turbo codes are a recently discovered class of error correction codes that achieve near-Shannon limit performance. Because of their complexity and highly parallel nature, turbo-coded applications are well suited for configurable computing. Field-programmable gate arrays (FPGAs), which are the main …
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Performance Optimization and Parallelization of Turbo Decoding for Software-Defined Radio
… standards to share a common architecture. Turbo codes offer excellent error-correcting performance, however, turbo decoders are one of the most computationally complex baseband tasks of a wireless receiver. Next generation wireless standards such as Worldwide Interoperability for Microwave …
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Adaptive Channel Estimation for Turbo Decoding
A new adaptive filter is proposed for the turbo decoding on Rayleigh fading channels with noisy channel estimates. The extrinsic information generated from the turbo decoder has some priority information about the transmitted data bits, which can help us better understand the channel characters. By …
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An investigation of Turbo Codes over Mobile Wireless Channels
Turbo codes have been the subject of much research in recent years, producing results very close to the theoretical limit set by Shannon. The codes have been successfully implemented in satellite and video conferencing systems and provision has been made in 3rd generation mobile systems. These …
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Design Of Fountain Codes With Error Control
… control property by integrating lt codes with turbo codes over a binary input additive white gaussian noise (bi-awgn) channel. A simple yet efficient technique for decomposing the rsd into two entirely different degree distributions is developed and presented in this thesis. These two …
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Implementation of Parallel and Serial Concatenated Convolutional Codes
… convolutional codes (PCCCs), called "turbo codes" by their discoverers, have been shown to perform close to the Shannon bound at bit error rates (BERs) between 1e-4 and 1e-6. Serial concatenated convolutional codes (SCCCs), which perform better than PCCCs at BERs lower than 1e-6, were …
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Guessing Random Additive Noise Decoding in Coded Multiple-Input Multiple-Output Systems
… MIMO system. Treating GRAND as an FEC decoder disjoint from the MIMO detector, we compare the soft-decision Ordered Reliability Bits GRAND (ORBGRAND) to CRC-Assisted Successive Cancellation List (CA-SCL) decoding of the CRC-Assisted Polar (CA-Polar) [105, 128] code found in the 5G New …
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Selective Interference Cancellation and Frame Synchronization for Packet Radio
… with error correction coding is studied. A decoder-assisted frame synchronization technique is proposed for future packet radio system. The performance of DS-CDMA in packet radio networks suffers from the near-far problem. This near-far problem can be alleviated by using either a multiuser …
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Packet data communications over coded CDMA with hybrid type-II ARQ
… dissertation presents in-depth investigation of turbo-coded CDNIA systems in packet data communication terminology. It is divided into three parts; (1) CDMA with hybrid FEC/ARQ in deterministic environment, (2) CDMA with hybrid FEC/ARQ in random access environment and (3) an implementation issue …
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Viability of High Availability Kband Satellite Communication using Hybrid Fade Mitigation
… the lower frequency bands.<br/><br/>A software turbo decoder capable of decoding the DVB-RCS turbo code is also described in this work since this was not available through other means. The fade dynamics at V band are reviewed and compared with the ITU-R models. The fade slope model gives a good …