首页> 外文期刊>American journal of applied sciences >THROUGHPUT AND BIT ERROR RATE ANALYSIS OF LUBY TRANSFORM CODES WITH LOW AND MEDIUM NODAL DEGREE DISTRIBUTIONS
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THROUGHPUT AND BIT ERROR RATE ANALYSIS OF LUBY TRANSFORM CODES WITH LOW AND MEDIUM NODAL DEGREE DISTRIBUTIONS

机译:低和中等结节度分布的卢比变换码的吞吐量和误码率分析

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摘要

This study presents two degree distributions namely low and medium nodal degree distributions aiming to build a low overhead Luby Transform (LT) codes. The motivation is to design a fast encoder/decoder especially for real-time multimedia streaming and multicasting applications using LT codes. The key idea of this study is to restrict the average degree of the transmitted encoded symbols as minimal. The impacts of low and medium degree encoded symbols on the performance of LT codes over an Additive White Gaussian Noise channel (AWGN) have been analyzed by the means of Bit Error Rate (BER), encoder/decoder delay, ripple size, throughput, overhead and bandwidth utilization as the performance metrics. Simulation results show that the proposed nodal degree distributions for LT codes achieve better throughput and BER performance at low overhead and delay with minimal decoding iterations by having a constantly decreasing ripple in comparison with conventional Robust Soliton Distribution (RSD) based LT codes.
机译:这项研究提出了两个度分布,即低和中节点度分布,旨在建立低开销的卢比变换(LT)码。其动机是设计一种快速编码器/解码器,尤其是使用LT代码的实时多媒体流和多播应用程序。这项研究的关键思想是将传输的编码符号的平均程度限制为最小。已通过误码率(BER),编码器/解码器延迟,纹波大小,吞吐量,开销等手段分析了低度和中度编码符号对加性高斯白噪声信道(AWGN)上LT码性能的影响和带宽利用率作为性能指标。仿真结果表明,与传统的基于鲁棒孤子分布(LTD)的LT代码相比,所提出的LT代码的节点度分布通过不断减少纹波,从而在较低的开销和延迟下以较低的开销实现了更好的吞吐量和BER性能。

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