Hybrid trellis coded modulation (HTCM) for visible light communications

Ndjiongue, Alain R.; Ferreira, H.C.

doi:10.1049/iet-com.2018.5324

Cited by 4 publications

(2 citation statements)

References 21 publications

(43 reference statements)

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“…In VLC, the notion of OFDM has been largely discussed, among others are [5][6][7][8][9]. Nevertheless, discussion on subcarrier transmission is minimal, aside from the color keying [10,11]. In this paper, as will be shown in the second part, i.e., the system model, NOMA is used to support multiple users accessing a single LED point.…”

Section: Introductionmentioning

confidence: 99%

“…This has led to convolutional coding, which has been studied on several points for VLC. It has been employed to enhance OOK-based system in [21], and in [11] trellis-coded modulation was proposed in hybrid with color keying (CSK). Trellis-or Viterbi-based coding is also found in researches on fiber optic [22][23][24] and free space optic [25], specifically for signal detection.…”

Section: Introductionmentioning

confidence: 99%

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Performance of signal detection with trellis code for downlink non-orthogonal multiple access visible light communication

2022

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This paper examines the implementation of multi-level amplitude modulation enforced by trellis coding in a downlink non-orthogonal multiple access channel for visible light communication (VLC). The non-orthogonal transmission is applied using superposition coding and successive interference cancellation with the support of a trellis decoder. The VLC is addressed by a channel model according to Lambert. Two levels of maximum likelihood signal detection are observed and compared, each for corresponding 4 and 8 trellis-coded modulation (TCM). The power ratio allotment is examined to investigate the system performance in the bit error rate. The simulation showed that a threshold of power ratio is needed to ensure good performance of signal detection. Further simulation with successive detection had shown effective results for up to three users.

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