Bit-Labeling for Delayed BICM with Iterative Decoding

Wang, Leijun; Cai, Suihua; Ma, Huixiao; Leung, W.K.; Ma, Xiao

doi:10.1109/isit.2018.8437452

Cited by 11 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this section, we first look into the normal graph of a DBICM transmission scheme. We then introduce the windowed decoding algorithm for DBICM and compare the proposed windowed decoding with the original decoding for DBICM, as well as the decoding of DBICM-ID [12].…”

Section: Windowed Decoding For Dbicmmentioning

confidence: 99%

“…Recently, the design and analysis for DBICM delay schemes and LDPC codes were investigated in [14], where a coding gain about 0.7 dB was observed for DBICM over BICM for uniform Gray labeled 64-quadrature amplitude modulation (QAM). In [12], constellation labeling design for uniform QAM DBICM with iterative detection and decoding (DBICM-ID) was investigated. Specifically, DBICM-ID iteratively decodes and detects the received sequences at several consecutive time slots regardless of the detection and decoding order [12].…”

Section: Introductionmentioning

confidence: 99%

“…In [12], constellation labeling design for uniform QAM DBICM with iterative detection and decoding (DBICM-ID) was investigated. Specifically, DBICM-ID iteratively decodes and detects the received sequences at several consecutive time slots regardless of the detection and decoding order [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Windowed Decoding for Delayed Bit-Interleaved Coded Modulation

Liao

Qiu

Yuan

2021

Preprint

View full text Add to dashboard Cite

Delayed bit-interleaved coded modulation (DBICM) generalizes bit-interleaved coded modulation (BICM) by modulating differently delayed sub-blocks of codewords onto the same signals. DBICM improves transmission reliability over BICM due to its capability of detecting undelayed sub-blocks with the extrinsic information of the decoded delayed sub-blocks. In this work, we propose a novel windowed decoding algorithm for DBICM, which uses the extrinsic information of both the decoded delayed and undelayed sub-blocks, to improve the detection on all sub-blocks. Numerical results show that the proposed windowed decoding significantly outperforms the original decoding.

show abstract

Section: Windowed Decoding For Dbicmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Windowed Decoding for Delayed Bit-Interleaved Coded Modulation

Liao

Qiu

Yuan

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The DBICM capacity with various delay pattern was investigated in [ 21 ]. In [ 22 ], the authors proposed the criteria for designing the bit labeling scheme for DBICM with iterative decoding. One of their criteria was based on the harmonic mean of the minimum squared Euclidean distance with a priori information.…”

Section: Introductionmentioning

confidence: 99%

Design of a Labeling Scheme for 32-QAM Delayed Bit-Interleaved Coded Modulation

Zhang

Zhou

Du³

et al. 2020

Sensors

View full text Add to dashboard Cite

It is very challenging to design the capacity-approaching labeling schemes for large constellations, such as 32-QAM, in delayed bit-interleaved coded modulation (DBICM). In this paper, we investigate the labeling design for 32-QAM DBICM with various numbers of bits delayed by one time slot. In particular, we aim to obtain the labeling schemes with a high DBICM channel capacity by searching the possible labeling schemes. To reduce the search space of the candidate labeling schemes, we propose the criteria that are necessary for good labeling. Based on the proposed criteria, a three-step search algorithm is proposed to obtain the candidate labeling efficiently. Numerical results demonstrate that the DBICM with our proposed labeling scheme can approach the capacity of 32-QAM within 0.015 dB at an information rate greater than 2.5 bits/symbol.

show abstract

“…The authors have also designed bit labels to achieve higher capacity improvement for DBICM under half 16-QAM where Gray labeling does not apply. Another constellation labeling design for 16-QAM DBICM with iterative detection and decoding (DBICM-ID) has been investigated in [15]. Despite their success, it is unclear how to design the delay schemes for a DBICM system to achieve the best possible spectrum efficiency for a fixed maximum number of delayed time slots.…”

Section: Introductionmentioning

confidence: 99%

LDPC Code Design for Delayed Bit-Interleaved Coded Modulation

Liao

Yang

Yuan

et al. 2019

2019 IEEE Information Theory Workshop (ITW)

View full text Add to dashboard Cite

This paper investigates the design and performance of delayed bit-interleaved coded modulation (DBICM) with lowdensity parity-check (LDPC) codes. For Gray labeled squareary quadrature amplitude modulation (QAM) constellations, we investigate the optimal delay scheme with the largest spectrum efficiency of DBICM for a fixed maximum number of delayed time slots and a given signal-to-noise ratio. When analyzing the capacity of DBICM, we find two important properties: the capacity improvement due to delayed coded bits being mapped to the real and imaginary parts of the transmitted symbols are independent of each other; a pair of delay schemes with delayed coded bits having identical bit-channel capacity lead to equivalent DBICM capacity. Using these two properties, we efficiently optimize the delay scheme for any uniform Gray-QAM systems. Furthermore, these two properties enable efficient LDPC code designs regarding unequal error protection via bit-channel type classifications. Moreover, we use protographbased extrinsic information transfer charts to jointly optimize degree distributions and channel assignments of LDPC codes and propose a constrained progressive edge growth like algorithm to jointly construct LDPC codes and bit-interleavers for DBICM, taking distinctive bit-channel's capacity into account. Simulation results demonstrate that the designed LDPC coded DBICM systems significantly outperform LDPC coded BICM systems.Index Terms-Low-density parity-check (LDPC) code, delayed bit-interleaved coded modulation (DBICM), bit-interleaved coded modulation (BICM).

show abstract

Bit-Labeling for Delayed BICM with Iterative Decoding

Cited by 11 publications

References 8 publications

Windowed Decoding for Delayed Bit-Interleaved Coded Modulation

Windowed Decoding for Delayed Bit-Interleaved Coded Modulation

Design of a Labeling Scheme for 32-QAM Delayed Bit-Interleaved Coded Modulation

LDPC Code Design for Delayed Bit-Interleaved Coded Modulation

Contact Info

Product

Resources

About