Turbo coding for the noisy 2-user binary adder channel with punctured convolutional codes

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• 作者：Maria de Lourdes M. G. Alcoforado ; Jamerson J. C. B. de Jesus…
• 关键词：Punctured turbo codes ; Binary additive channels ; White Gaussian noise ; Adapted BCJR algorithm ; Iterative decoding
• 刊名：Telecommunication Systems
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：64
• 期：3
• 页码：459-465
• 全文大小：
• 刊物类别：Business and Economics
• 刊物主题：IT in Business; Computer Communication Networks; Artificial Intelligence (incl. Robotics); Probability Theory and Stochastic Processes;
• 出版者：Springer US
• ISSN：1572-9451
• 卷排序：64

文摘

This paper investigates the use of punctured recursive systematic convolutional codes for turbo coding in a 2-user binary adder channel (2-BAC) in the presence of additive white Gaussian noise, aiming to achieve a higher transmission sum rate with reduced decoding complexity. The encoders for the 2-BAC are assumed to be block synchronized and to employ identical puncturing patterns. Iterative decoding combining the Bahl Cocke Jelinek Raviv algorithm and a two-user punctured trellis is employed. For each user and for a fixed puncturing pattern, random interleavers of length 256 bits or 1024 bits, respectively, are simulated and corresponding curves relating bit error rate versus signal to noise ratio are presented for performance comparison purposes. Computer simulation indicates that the loss in performance of a punctured turbo code can be negligible when longer interleavers are used for both users, similarly to the single user case.