| Presentation | 2022-07-14 M-point Combinatory for Image Sensor-based Visible Light Communications Takumi Sato, Koji Kamakura, Masayuki Kinoshita, Takaya Yamazato, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | An $M$-point combinatory (MC) modulation is proposed for parallel transmission (PT) image sensor (IS)-based visible light communication (VLC). In the conventional PT system, $M_0$ discrete signals which incorporate $N=(M_0-1)/2$ spatial frequencies are transmitted in parallel with $M_0$ transmitting regions of liquid crystal display (LCD). When each of spatial frequencies is modulated with $P$-ary phase shift keying ($P$-PSK), the number of bits transmitted in one frame is given by $k=N log_2 P$,bits. $k$ increases when the number of spatial frequencies $N$ increases with increasing $M_0$, but at same time, the peak-to-average power ratio (PAPR) becomes high because the signal of the PT system is essentially orthogonal frequency modulation. Therefore, the number of spatial frequencies $N$ without any error remains at a very low number. In this paper, we propose an MC modulation, which is combined with the PT system to increase the number of bits per frame that the system carries without any error. In our proposed MC PT system, $M$ out of the $M_0$ transmitting regions are used, where $M leq M_0$. Since there are $binom{M_0}{M}$ ways in choosing $M$ out of the $M_0$ ones, we map them to $ell= left lfloor log_2 binom{M_0}{M} right rfloor$,bits. According to $ell$,bits, $M$ transmitting regions are chosen for a frame, and then the $M$ chosen ones are used to transmit $M$ discrete signals of the PT system. Our experimental results show that our proposed MC PT system with 8-PSK achieves $697$,bits/frame with keeping no error being observed, while the conventional PT system achieves only 180,bits/frame. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Visible light communications / Optical wireless communications / Image sensor communications / Parallel transmission / Spatial OFDM / Parallel combinatory |
| Paper # | CS2022-28 |
| Date of Issue | 2022-07-07 (CS) |
| Conference Information | |
| Committee | CS |
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| Conference Date | 2022/7/14(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Yakushima Environmental and Cultural Village Center |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Next Generation Networks, Access Networks, Broadband Access, Power Line Communications, Wireless Communication Systems, Coding Systems, etc. |
| Chair | Daisuke Umehara(Kyoto Inst. of Tech.) |
| Vice Chair | Seiji Kozaki(Mitsubishi Electric) |
| Secretary | Seiji Kozaki(Chiba Inst. of Tech.) |
| Assistant | Hikaru Kawasaki(NICT) / Yuta Ida(Yamaguchi Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Communication Systems |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | M-point Combinatory for Image Sensor-based Visible Light Communications |
| Sub Title (in English) | |
| Keyword(1) | Visible light communications |
| Keyword(2) | Optical wireless communications |
| Keyword(3) | Image sensor communications |
| Keyword(4) | Parallel transmission |
| Keyword(5) | Spatial OFDM |
| Keyword(6) | Parallel combinatory |
| 1st Author's Name | Takumi Sato |
| 1st Author's Affiliation | Chiba Institute of Technology(CIT) |
| 2nd Author's Name | Koji Kamakura |
| 2nd Author's Affiliation | Chiba Institute of Technology(CIT) |
| 3rd Author's Name | Masayuki Kinoshita |
| 3rd Author's Affiliation | Chiba Institute of Technology(CIT) |
| 4th Author's Name | Takaya Yamazato |
| 4th Author's Affiliation | Nagoya University(Nagoya Univ.) |
| Date | 2022-07-14 |
| Paper # | CS2022-28 |
| Volume (vol) | vol.122 |
| Number (no) | CS-110 |
| Page | pp.pp.63-68(CS), |
| #Pages | 6 |
| Date of Issue | 2022-07-07 (CS) |