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Research on Soft-Decision Decoding Algorithms of RS Codes and Its Implementation in SOPC Technology

Author: QiPeiHan
Tutor: XiangZheng
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: RS code Chase2 algorithm ABP algorithm SOPC Nios II
CLC: TN911.2
Type: Master's thesis
Year: 2011
Downloads: 76
Quote: 1
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Abstract


- Class of linear block code the Reed-Sotomon code as very important , very reasonable and rigorous algebraic structure , the perfect mesh ' efficient hard decision decoding algorithm and powerful ability to correcting burst errors and random errors . Currently , RS code has a wide range of applications in the field of deep space communications , magnetic recording device , digital multimedia transmission . Contingent RS code is a lack of simple and easy 10 to achieve soft-decision decoding algorithm , which greatly affected the RS code in future communication systems , soft-decision decoding algorithm of RS code , and the use of advanced technology soft-decision decoding the algorithm has important theoretical significance and value of engineering applications . This paper first introduces the principle of RS encoding and hard decision decoding , and then listed the existing - some based reliability RS code soft decision decoding algorithm . On this basis , the key research a C hase2 soft-decision decoding algorithm and adaptive belief propagation decoding (ABP) algorithm to analyze the performance of the two algorithms , from the the two Wu domain operations point of view , compared to both achieve complexity , and Chase2 soft decision decoding algorithm and SNR estimation algorithm combined replacement of the median , based on the quality of the channel selected to achieve the purpose of balancing algorithm complexity and decoding gain . Finally, of the Chase2 decoding algorithm is applied to the wireless sensor networks , sensor sensing node can effectively improve the accuracy of the data transmission rate and single-node communication coverage . Advanced programmable -chip (SOPC) technology used in the implementation process , by custom the Galois field operator user instructions for the Nios II CPU , floating point arithmetic the user instruction based Ava to n user peripherals , to ensure the C hase2 the performance of the decoding algorithm to reduce the number of instructions needed execution of Chase2 soft decoding algorithm , improved Chase2 soft-decision decoding speed , and reflect Chase2 soft decoding algorithms using SOPC technology advantage .

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