Irregular mapping design for bit-interleaved coded modulation with low complexity iterative decoding

Wang, Qiang; Zhang, Can; Dai, Jing

doi:10.1109/iceiec.2016.7589683

Cited by 3 publications

(4 citation statements)

References 15 publications

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“…In these studies, however, the authors have not reported results for constellations larger than 64-QAM due to a very high computational complexity. In [16]- [19], an EXIT-based method is proposed to find suitable mappings that improve the iterative decoding systems BER at any signal to noise ratio (SNR) with an arbitrary number of iterations. In [20], the authors have designed an EXIT-chart aided serach method to develop capacity approaching coded modulations.…”

Section: Introductionmentioning

confidence: 99%

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Novel Method for Multi-Dimensional Mapping of Higher Order Modulations for BICM-ID Over Rayleigh Fading Channels

Navazi

Hossain

2019

IEEE Trans. Wireless Commun.

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Multi-dimensional (MD) mapping offers more flexibility in mapping design for bit-interleaved coded modulation with iterative decoding (BICM-ID) and potentially improves the bandwidth efficiency. However, for higher order signal constellations, finding suitable MD mappings is a very complicated task due to the large number of possible mappings. In this paper, a novel mapping method is introduced to construct efficient MD mappings to improve the error performance of BICM-ID over Rayleigh fading channels. We propose to break the MD mapping design problem into four distinct 2-D mapping functions. The 2-D mappings are designed such that the resulting MD mapping improves the BICM-ID error performance at low signal to noise ratios (SNRs). We also develop cost functions that can be optimized to improve the error performance at high SNRs. The proposed mapping method is very simple compared to well-known mapping methods, and it can achieve suitable MD mappings for different modulations including higher order modulations for BICM-ID. Simulation results show that our mappings significantly outperform the previously known mappings at a target bit error rate (BER) of 10 −6 . Our mappings also offer a lower error-floor compared to their well-known counterparts. Index TermsBICM-ID, multi-dimensional signal mapping, QAM, Rayleigh fading channels.

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Section: Introductionmentioning

confidence: 99%

“…In these studies, however, the authors have not reported results for constellations larger than 64-QAM due to a very high computational complexity. In [16]- [19],…”

Section: Introductionmentioning

confidence: 99%

Novel Method for Multi-Dimensional Mapping of Higher Order Modulations for BICM-ID Over Rayleigh Fading Channels

Navazi

Hossain

2019

IEEE Trans. Wireless Commun.

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“…Thus, the application of BICM-ID would increase the total read latency and consequently deteriorate the system performance. To overcome this disadvantage, irregular mapping (IM) has been developed to accelerate the convergence of BICM-ID systems [26]- [29], in which different mappings are used within a codeword. Compared with the regular mapping, IM can provide additional convergence improvement and more flexible design for BICM-ID systems.…”

mentioning

confidence: 99%

“…Also, an IM design method has been presented in [28], where a new mapping is searched via modified adaptive binary switch algorithm (ABSA) given a pre-fix mapping, a channel code and a mixing ratio. The authors in [29] have optimized the mixing ratio of two mappings by maximizing the extrinsic mutual information (MI). Nonetheless, the above mentioned works only focus on the design of IM for BICM-ID systems over AWGN and fading channels.…”

mentioning

confidence: 99%

Irregular-Mapped Protograph LDPC-Coded Modulation: A Bandwidth-Efficient Solution for 6G-Enabled Mobile Networks

Fang

Chen

et al. 2023

IEEE Trans. Intell. Transport. Syst.

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The huge amount of data produced in the 6G networks not only brings new challenges to the reliability and efficiency of mobile devices but also drives rapid development of new storage techniques. With the benefits of fast access speed and high reliability, NAND flash memory has become a promising storage solution for the 6G networks. In this paper, we investigate a protograph-coded bit-interleaved coded modulation with iterative detection and decoding (BICM-ID) utilizing irregular mapping (IM) in the NAND flash-memory systems. First, we propose an enhanced protograph-based extrinsic information transfer (EPEXIT) algorithm to facilitate the analysis of protograph codes in the IM-BICM-ID systems. With the use of EPEXIT algorithm, a simple design method is conceived for the construction of a family of high-rate protograph codes, called irregular-mapped accumulate-repeat-accumulate (IMARA) codes, which possess excellent decoding thresholds and linearminimum-distance-growth property. Furthermore, motivated by the voltage-region iterative gain characteristics of IM-BICM-ID systems, a novel read-voltage optimization scheme is developed to acquire accurate read-voltage levels, thus minimizing the decoding thresholds (in dB) of protograph codes. Analyses and simulations indicate that the proposed IMARA-aided IM-BICM-ID scheme and read-voltage optimization scheme remarkably improve the convergence and decoding performance of flashmemory systems. Thus, the proposed protograph-coded IM-BICM-ID can be viewed as a reliable and efficient storage solution for the new-generation mobile networks, such as Internet of Vehicles.

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Irregular-Mapped Protograph LDPC-Coded Modulation: A Bandwidth-Efficient Solution for $5$G Networks with Massive Data-Storage Requirement

Fang¹,

Bu²,

Chen³

et al. 2021

Preprint

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Irregular mapping design for bit-interleaved coded modulation with low complexity iterative decoding

Cited by 3 publications

References 15 publications

Novel Method for Multi-Dimensional Mapping of Higher Order Modulations for BICM-ID Over Rayleigh Fading Channels

Novel Method for Multi-Dimensional Mapping of Higher Order Modulations for BICM-ID Over Rayleigh Fading Channels

Irregular-Mapped Protograph LDPC-Coded Modulation: A Bandwidth-Efficient Solution for 6G-Enabled Mobile Networks

Irregular-Mapped Protograph LDPC-Coded Modulation: A Bandwidth-Efficient Solution for $5$G Networks with Massive Data-Storage Requirement

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