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Cooperative Diversity Performance Using Duo-Binary Turbo Codes  

Yeo, Sung-Moon (Chonbuk National University Electronic & Information Engineering)
Kim, Soo-Young (Chonbuk National University Electronic & Information Engineering)
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Abstract
In this paper, we propose an efficient cooperative diversity technique, which partition the codewords of each mobile and transmit portions of each codeword through independent fading channels using duo-binary turbo codes. A coded diversity technique can achieve high cooperative diversity gain by decoding and transmitting of the re-encoded signal, while this can also cause high performance degradation due to failure of the decoding. In this paper, we introduce various coded diversity technique using duo-binary turbo codes which are defined as channel coding schemes in the IEEE WiMax specification, and also demonstrate performance simulation results with the analysis. We also propose a cooperative diversity technique using rate-compatible duo-binary turbo codes, where user terminals with different parity symbols cooperate each other. Simulation results investigated in this paper reveal that the proposed scheme show high diversity gain at a reasonal SNR range.
Keywords
Duo-Binary turbo codes; cooperation; coded diversity; iterative decoding;
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