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Research on Distributed LT Coding for Binary Erasure Channel

Author: LiXuDong
Tutor: LiYing
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Distributed Encoding Delete channel LT code Relay network
CLC: TN911.22
Type: Master's thesis
Year: 2011
Downloads: 57
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Abstract


In many cases , the distributed coding techniques can effectively improve the performance of the system as a whole . Distributed coding technology used in digital fountain codes , research in the design of multi-source , single relay model under the distributed program . The article first describes the basic principle of the distributed LT codes delete channel including LT codes deconvolution technique, the encoding method of the source node and the relay node merge processing technology . Based on the principle of distributed LT code , given the two - source single- relay model and source single relay model distributed LT coding scheme . The simulation results show that relative to traditional LT code program , the use of distributed LT coding scheme can effectively improve the performance of the entire system . Two source , single relay model for the analysis of simulation results , this paper describes an improved distributed LT coding scheme , including a new LT codes deconvolution coding method , the source node and a new The relay node merge processing technology . , Better system performance can be obtained using this new distributed LT codes in the source to relay link erasure . Simulation results show that when the source to relay link erasure probability is large ( greater than 0.2) , a new distributed LT codes can indeed improve the overall system performance , however , when the source to relay link erasure probability smaller , system performance is not improved. To further improve the performance of the source to relay link lossless case a modified relay processing strategy to improve the degree of relay node sends the code symbols proportion , and the proposed algorithm is verified by simulation effectiveness.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication theory > Information Theory > Channel coding theory
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