The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
속도 호환이 가능한 펑처링된 저밀도 패리티 검사(LDPC) 코드를 기반으로 하는 증분 중복 하이브리드 ARQ(IR-HARQ)는 광범위한 SNR에 걸쳐 높은 처리량을 달성할 수 있습니다. 이러한 IR-HARQ 방식의 한 가지 단점은 높은 속도의 초기 전송을 위한 디코딩의 높은 계산 복잡성입니다. 본 논문에서는 이러한 문제를 극복하기 위해 속도 호환형 LDPC 코드 기반의 단축 및 확장을 통한 HARQ 방식을 제시한다. HARQ 방식에서는 고속의 마더 코드(mother code)를 먼저 전송하고, 조기 재전송 요청을 위해 단축된 코드의 패리티 비트를 전송한다. 고속 모 코드의 복잡도가 낮은 디코더를 사용하면 이러한 단축 코드 접근 방식은 디코딩의 계산 복잡도를 낮추지만 재전송이 반복됨에 따라 더 짧은 길이와 더 많은 단축 코드를 디코딩하게 됩니다. 이로 인한 성능 저하 및 복잡성 저하를 방지하기 위해 미리 정해진 재전송 시간 이후에 단축된 코드에 대해 효율적으로 확장이 적용됩니다. HARQ 방식의 요구 사항을 충족하는 불규칙한 LDPC 코드를 구성하기 위해 다중 에지 유형 코드 설계가 사용됩니다. 시뮬레이션 결과는 HARQ 방식이 광범위한 SNR에 걸쳐 우수한 처리량으로 기존 IR-HARQ 방식보다 디코딩의 계산 복잡도를 낮출 수 있음을 보여줍니다.
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Toshihiko OKAMURA, "A Hybrid ARQ Scheme Based on Rate-Compatible Low-Density Parity-Check Codes by Shortening and Extending" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 11, pp. 2883-2890, November 2009, doi: 10.1587/transfun.E92.A.2883.
Abstract: Incremental Redundancy Hybrid ARQ (IR-HARQ) based on rate-compatible punctured low-density parity-check (LDPC) codes can achieve high throughput over a wide range of SNRs. One drawback of such IR-HARQ schemes is high computational complexity of decoding for early transmission at high rates. In order to overcome this problem, a HARQ scheme based on rate-compatible LDPC codes by shortening and extending is presented in this paper. In the HARQ scheme, a high-rate mother code is transmitted at first, and parity-bits of a shortened code are transmitted for early retransmission requests. With a low-complexity decoder of the high-rate mother code, this shortened-code approach would result in low computational complexity of decoding, but it causes smaller length and larger number of shortened codes to be decoded as retransmission repeats. To prevent the resultant degradation of performance and complexity, extending is efficiently applied to the shortened codes after predetermined retransmission-times. A multi-edge type code-design is employed to construct irregular LDPC codes that meet the requirement of the HARQ scheme. Simulation results show that the HARQ scheme can achieve lower computational complexity of decoding than a conventional IR-HARQ scheme with good throughput over a wide range of SNRs.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.2883/_p
부
@ARTICLE{e92-a_11_2883,
author={Toshihiko OKAMURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Hybrid ARQ Scheme Based on Rate-Compatible Low-Density Parity-Check Codes by Shortening and Extending},
year={2009},
volume={E92-A},
number={11},
pages={2883-2890},
abstract={Incremental Redundancy Hybrid ARQ (IR-HARQ) based on rate-compatible punctured low-density parity-check (LDPC) codes can achieve high throughput over a wide range of SNRs. One drawback of such IR-HARQ schemes is high computational complexity of decoding for early transmission at high rates. In order to overcome this problem, a HARQ scheme based on rate-compatible LDPC codes by shortening and extending is presented in this paper. In the HARQ scheme, a high-rate mother code is transmitted at first, and parity-bits of a shortened code are transmitted for early retransmission requests. With a low-complexity decoder of the high-rate mother code, this shortened-code approach would result in low computational complexity of decoding, but it causes smaller length and larger number of shortened codes to be decoded as retransmission repeats. To prevent the resultant degradation of performance and complexity, extending is efficiently applied to the shortened codes after predetermined retransmission-times. A multi-edge type code-design is employed to construct irregular LDPC codes that meet the requirement of the HARQ scheme. Simulation results show that the HARQ scheme can achieve lower computational complexity of decoding than a conventional IR-HARQ scheme with good throughput over a wide range of SNRs.},
keywords={},
doi={10.1587/transfun.E92.A.2883},
ISSN={1745-1337},
month={November},}
부
TY - JOUR
TI - A Hybrid ARQ Scheme Based on Rate-Compatible Low-Density Parity-Check Codes by Shortening and Extending
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2883
EP - 2890
AU - Toshihiko OKAMURA
PY - 2009
DO - 10.1587/transfun.E92.A.2883
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2009
AB - Incremental Redundancy Hybrid ARQ (IR-HARQ) based on rate-compatible punctured low-density parity-check (LDPC) codes can achieve high throughput over a wide range of SNRs. One drawback of such IR-HARQ schemes is high computational complexity of decoding for early transmission at high rates. In order to overcome this problem, a HARQ scheme based on rate-compatible LDPC codes by shortening and extending is presented in this paper. In the HARQ scheme, a high-rate mother code is transmitted at first, and parity-bits of a shortened code are transmitted for early retransmission requests. With a low-complexity decoder of the high-rate mother code, this shortened-code approach would result in low computational complexity of decoding, but it causes smaller length and larger number of shortened codes to be decoded as retransmission repeats. To prevent the resultant degradation of performance and complexity, extending is efficiently applied to the shortened codes after predetermined retransmission-times. A multi-edge type code-design is employed to construct irregular LDPC codes that meet the requirement of the HARQ scheme. Simulation results show that the HARQ scheme can achieve lower computational complexity of decoding than a conventional IR-HARQ scheme with good throughput over a wide range of SNRs.
ER -