In this paper, a novel accumulate-repeat-accumulate-check-accumulate (ARACA) code is proposed as a subclass of protograph-based low-density parity-check (LDPC) codes. The key feature of the proposed ARACA code is represented by the outer connection doping in the protograph. This feature can provide the linear minimum distance growth (LMDG) property at a good iterative decoding threshold while maintaining an efficient encoder structure. The effect of the outer connection doping on the typical minimum distance, the iterative decoding threshold, and the LMDG property is discussed and analyzed by comparing case examples and using the asymptotic protograph ensemble weight enumerator. Some good ARACA code protographs are provided for a wide range of code rates. In addition, an efficient and universal encoding procedure and the corresponding encoder structure are provided for them. The performance of the proposed ARACA code is evaluated and compared with well-known good LDPC codes. The simulation results confirm the superiority of the proposed ARACA codes in terms of encoding complexity and frame error rate performance, especially at low-rates in an ultra-reliable regime.
|Number of pages||15|
|Journal||IEEE Transactions on Communications|
|Publication status||Published - 2017 Nov|
Bibliographical noteFunding Information:
Manuscript received March 3, 2017; revised June 6, 2017; accepted June 27, 2017. Date of publication July 11, 2017; date of current version November 15, 2017. This work was supported in part by Institute of Information & communications Technology Promotion (IITP) grant funded by the Korea government (MSIP) [2015-0-00300, Multiple Access Technique with Ultra-Low Latency and High Efficiency for Tactile Internet Services in IoT Environments] and in part by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (NRF-2014R1A2A2A01007254). The associate editor coordinating the review of this paper and approving it for publication was L. Dolecek. (Corresponding author: Kwang Soon Kim.) The authors are with the Department of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea (e-mail:email@example.com).
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering