Block Markov superposition transmission of LDPC codes
In this paper, based on the block Markov superposition transmission (BMST) technique, we present a new class of coupled low-density parity-check (LDPC) codes for the transport block (TB)-based transmission to improve the error-correcting performance. For encoding, the previous LDPC codewords corresp...
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KeAi Communications Co., Ltd.
2023-07-01
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| Series: | Journal of Information and Intelligence |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949715923000197 |
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| author | Qianfan Wang Kongjing Guo Xiao Ma |
| author_facet | Qianfan Wang Kongjing Guo Xiao Ma |
| author_sort | Qianfan Wang |
| collection | DOAJ |
| description | In this paper, based on the block Markov superposition transmission (BMST) technique, we present a new class of coupled low-density parity-check (LDPC) codes for the transport block (TB)-based transmission to improve the error-correcting performance. For encoding, the previous LDPC codewords corresponding to a TB (at prior time slot) are interleaved and superimposed onto the current LDPC codewords, resulting in the transmitted codewords. For decoding, the sliding window decoding algorithm with sum-product or min-sum implementations can be employed, inheriting a relatively low-latency decoding. A distinguished advantage of the proposed coded transmission over spatially coupled LDPC (SC-LDPC) codes is that the encoder/decoder of the proposed codes can be designed by reusing the encoder/decoder architecture of component block LDPC codes. To analyze the waterfall performance of BMST-LDPC code ensembles, we present the protograph-based EXIT chart analysis, which can efficiently predict the error-correcting performance in waterfall region. To analyze the error-floor performance of BMST-LDPC codes, we employ the genie-aided (GA) lower bound, which can efficiently predict the error-correcting performance in error-floor region. For ease of implementation, the BMST-LDPC codes are constructed by taking the (2, 4)-raptor-like LDPC codes or the 5G LDPC codes as the basic components. The numerical results reveal that the proposed codes can have capacity-approaching performance, exhibiting a gap of 0.007 dB away from the corresponding Shannon limit. They also reveal that, by using the proposed BMST construction, the error-correcting performance of the original 5G block LDPC codes can be significantly improved, achieving coding gains up to one dB over the AWGN channels and two dB over the fast fading channels. |
| format | Article |
| id | doaj-art-6340a8fbe1a044779c34c3318d5f5d67 |
| institution | Kabale University |
| issn | 2949-7159 |
| language | English |
| publishDate | 2023-07-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Information and Intelligence |
| spelling | doaj-art-6340a8fbe1a044779c34c3318d5f5d672025-08-20T03:34:36ZengKeAi Communications Co., Ltd.Journal of Information and Intelligence2949-71592023-07-011211513310.1016/j.jiixd.2023.05.001Block Markov superposition transmission of LDPC codesQianfan Wang0Kongjing Guo1Xiao Ma2School of Computer Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Key Laboratory of Information Security Technology, Sun Yat-sen University, Guangzhou 510006, ChinaSchool of Computer Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Key Laboratory of Information Security Technology, Sun Yat-sen University, Guangzhou 510006, ChinaSchool of Computer Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Key Laboratory of Information Security Technology, Sun Yat-sen University, Guangzhou 510006, China; Corresponding author.In this paper, based on the block Markov superposition transmission (BMST) technique, we present a new class of coupled low-density parity-check (LDPC) codes for the transport block (TB)-based transmission to improve the error-correcting performance. For encoding, the previous LDPC codewords corresponding to a TB (at prior time slot) are interleaved and superimposed onto the current LDPC codewords, resulting in the transmitted codewords. For decoding, the sliding window decoding algorithm with sum-product or min-sum implementations can be employed, inheriting a relatively low-latency decoding. A distinguished advantage of the proposed coded transmission over spatially coupled LDPC (SC-LDPC) codes is that the encoder/decoder of the proposed codes can be designed by reusing the encoder/decoder architecture of component block LDPC codes. To analyze the waterfall performance of BMST-LDPC code ensembles, we present the protograph-based EXIT chart analysis, which can efficiently predict the error-correcting performance in waterfall region. To analyze the error-floor performance of BMST-LDPC codes, we employ the genie-aided (GA) lower bound, which can efficiently predict the error-correcting performance in error-floor region. For ease of implementation, the BMST-LDPC codes are constructed by taking the (2, 4)-raptor-like LDPC codes or the 5G LDPC codes as the basic components. The numerical results reveal that the proposed codes can have capacity-approaching performance, exhibiting a gap of 0.007 dB away from the corresponding Shannon limit. They also reveal that, by using the proposed BMST construction, the error-correcting performance of the original 5G block LDPC codes can be significantly improved, achieving coding gains up to one dB over the AWGN channels and two dB over the fast fading channels.http://www.sciencedirect.com/science/article/pii/S29497159230001975G NRBlock Markov superposition transmission (BMST)Low-density parity-check (LDPC) codesSpatially-coupled LDPC (SC-LDPC) codes |
| spellingShingle | Qianfan Wang Kongjing Guo Xiao Ma Block Markov superposition transmission of LDPC codes Journal of Information and Intelligence 5G NR Block Markov superposition transmission (BMST) Low-density parity-check (LDPC) codes Spatially-coupled LDPC (SC-LDPC) codes |
| title | Block Markov superposition transmission of LDPC codes |
| title_full | Block Markov superposition transmission of LDPC codes |
| title_fullStr | Block Markov superposition transmission of LDPC codes |
| title_full_unstemmed | Block Markov superposition transmission of LDPC codes |
| title_short | Block Markov superposition transmission of LDPC codes |
| title_sort | block markov superposition transmission of ldpc codes |
| topic | 5G NR Block Markov superposition transmission (BMST) Low-density parity-check (LDPC) codes Spatially-coupled LDPC (SC-LDPC) codes |
| url | http://www.sciencedirect.com/science/article/pii/S2949715923000197 |
| work_keys_str_mv | AT qianfanwang blockmarkovsuperpositiontransmissionofldpccodes AT kongjingguo blockmarkovsuperpositiontransmissionofldpccodes AT xiaoma blockmarkovsuperpositiontransmissionofldpccodes |