Hsin-Kun Lai and Erl-Huei Lu
Chin Min Institute of Technology, Chang Gung University
No. 110, Syuefu Rd., Toufen Township, Miaoli County, Taiwan 351, R.O.C.
259 Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, Taiwan 333, R.O.C.
Based on the conception of majority voting, a hybrid ARQ scheme for binary linear block codes over AWGN
channel is presented. At each transmission, the received word is kept in memory buffers if errors are detected. If there
are still errors after a number of transmissions, the re-transmission stops to improve the throughput efficiency. From the
received words, the decoding process of proposed hybrid ARQ first determines each bit as 1 or 0 based on the majority
of the corresponding bits in the received words. The word resulting from voting is then decoded by algebraic decoder as
the output code word. Simulation results show that the proposed hybrid ARQ scheme outperforms ARQ scheme in both
error-correcting performance and throughput efficiency, particularly under low SNR. Additionally, a criterion in terms
of throughput and coding gain is proposed for overall evaluation of hybrid ARQ schemes compared to that of ARQ
scheme. Comparisons between plurality-based hybrid ARQ and majority-based hybrid ARQ are also made on the basis
of proposed hybrid coding gain.
Keywords:
hybrid ARQ, throughput, majority voting, coding gain.
No comments:
Post a Comment