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 13 of 13 for “"Turbo Code"”.
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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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Evaluation of Soft Output Decoding for Turbo Codes
Evaluation of soft output decoding for turbo codes is presented. Coding theory related to this research is studied, including convolutional encoding and Viterbi decoding. Recursive systematic convolutional (RSC) codes and nonuniform interleavers commonly used in turbo code encoder design are …
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Adaptive radio resource management for mobile satellite systems
… technique and rate compatible punctured turbo-code (RCPT), which has been found to give improved throughput performance in a direct sequence (DS) CDMA, are exploited.
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On performance analysis and implementation issues of iterative decoding for graph based codes
There is no doubt that long random-like code has the potential to achieve good performance because of its excellent distance spectrum. However, these codes remain useless in practical applications due to the lack of decoders rendering good performance at an acceptable complexity. The invention of …
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Design and analysis of transmission strategies in wireless relay networks
… a full diversity order. A distributed space-time coded soft information relaying in Rayleigh fading channels is also considered. It is shown that the proposed distributed MIF Alamouti scheme can achieve a full diversity order, and outperforms various well-known distributed Alamouti schemes. …
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Trellis-based iterative decoding of block codes for satellite ATM
… channels such as satellite links, error control codes are needed to provide high performance at very low Signal-to-Noise Ratios (SNRs). Turbo Codes or concatenated codes with iterative decoding, can achieve a performance very close to the Shannon limit. They are the most powerful codes known so …
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On the Design of Turbo Codes
This thesis is about Turbo codes - codes constructed via parallel concatenation of two recursive convolutional encoders linked by an interleaver. The focus of the work is on the understanding and design of Turbo codes. This includes thorough investigation of central components that influence Turbo …
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New method of polar channel coding for reducing the bit error rate with low complexity in the F-OFDM underwater acoustic communications
… results obtained using the proposed method and turbo code achieved a superior gain in the signal-noise ratio (SNR) about 11.2 dB and 13.5 dB respectively at BER of 1×10-3 compared to the uncoded (without channel coding). In addition, the computational complexity levels have been reduced about …
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Adaptive iterative multiuser detection for wireless communication systems
… algorithm. The results thus obtained for an uncoded adaptive receiver system are applied to a coded system, transmitting either recursive systematic code (RSC) or turbo-code through a spread-spectrum multiuser multiple-path channel, which are referred to as two-stage and three-stage systems …
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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 …
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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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Turbo space-time coded modulation : principle and performance analysis
… in coding was achieved with the invention of turbo codes. Turbo codes approach Shannon capacity by displaying the properties of long random codes, yet allowing efficient decoding. Coding alone, however, cannot fully address the problem of multipath fading channel. Recent advances in …
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Non-Binary Coded Modulation for FMF-Based Coherent Optical Transport Networks
… modulation schemes. Thirdly, we propose tandem-turbo-product nonbinary byte-interleaved coded modulation (BICM) for next-generation high-speed optical transmission systems. Fourthly, we study the Q factor and mutual information as threshold in BICM scheme. Lastly, an experimental study of the …