Distribution Matching for Dimming Control in Visible-Light Region-of-Interest Signaling

We propose a two-level dimmer based on binary distribution matching where a low-rate signal controls the output probability distribution of a high-rate bit sequence, which can be used in region-of-interest (RoI) signaling applications. To reduce the rate loss of the dimmer, we propose the extended m...

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Bibliographic Details
Published inIEEE photonics journal Vol. 15; no. 1; pp. 1 - 14
Main Authors Nguyen, Phuc Duc, Shiraki, Yoshifumi, Ishikawa, Kenji, Muramatsu, Jun, Harada, Noboru, Moriya, Takehiro
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.02.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Algorithms
Cameras
Composition
Decoding
Dimming
dimming control
distribution matching
Error correction
Forward error correction
Hybrid systems
Matching
Optical transmitters
Probabilistic logic
Probabilistic shaping
region-of-interest signaling
Signalling systems
Symbols
Systematics
visible light communication
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Summary:We propose a two-level dimmer based on binary distribution matching where a low-rate signal controls the output probability distribution of a high-rate bit sequence, which can be used in region-of-interest (RoI) signaling applications. To reduce the rate loss of the dimmer, we propose the extended multiset-partition distribution matching (EMPDM) algorithm with a novel binary-tree-structure implementation. In addition, we introduce 4p-EMPDM, a compact version of EMPDM, which has a typical composition (TC) and four leading composition pairs (CPs). The codebook of 4p-EMPDM includes only run-length-aware codewords, which reduces the maximum run-length of the transmitted bit sequence by 4.27 times. Hence, it guarantees flicker mitigation for visible-light RoI signaling systems at 6 kHz without using any run-length limited code (non-RLL). Using experimental data collected from the low-rate RoI signaling prototype, we introduced a threshold range where both intensity and area information of the received training symbols can be exploited to optimize the shaping ratios of the 4p-EMPDM dimmer. Because of the non-RLL feature, the proposed system can support soft-decision forward-error-correction (FEC) decoding to improve reliability. Our system outperforms related systems based on hybrid modulation schemes in terms of spectral efficiency, bit rate, and minimum required optical clock rate.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2022.3233092