Combining-after-Decoding Turbo Hybrid ARQ by Utilizing Doped-Accumulator

• Published in: IEEE communications letters Vol. 17; no. 6; pp. 1212 - 1215
• Main Authors: Irawan, A., Anwar, K., Matsumoto, T.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.06.2013; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Automatic repeat request; Coding, codes; Decoding; Design automation; Diversity reception; doped-accumulator; Doping; Exact sciences and technology; Hybrid ARQ; Information, signal and communications theory; Signal and communications theory; Signal to noise ratio; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Throughput; Transmission and modulation (techniques and equipments); turbo principle; Performance evaluation; doped-accumulator; turbo principle; Logarithmic function; Doping; Error rate; Information rate; Doped materials; Likelihood ratio; Iterative method; Frame rate; Concatenated codes; Decoding; Hybrid ARQ; Hybrid mode; Information transmission; Simulation; Automatic repeat request; Computer aided design; Mutual information
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2013.043013.130059

This letter proposes a doped-accumulator assisted packet-combining-after-decoding (ACC-CAD) technique with different doping rates per transmission phases for hybrid automatic repeat request (ARQ). Horizontal iteration (HI) performed for decoding the serially concatenated codes (SCC) is followed by Vertical iteration (VI) to exchange extrinsic log-likelihood ratio (LLR) of the uncoded (systematic) bits, and the HI/VI chain is repeated. The doped-accumulator enables the two extrinsic information transfer (EXIT) curves of the SCC to match very well and the convergence tunnel to open until a point very close to the (1.0,1.0) mutual information point. Excellent performance of our technique is verified through EXIT analysis as well as frame-error-rate (FER) and throughput simulations.