Dimmable Visible Light Communication Scheme Based on Punctured Polar Codes

Lin Li; Chao Wang; Jianing Guo; Qi Wu; Jian Zhang

doi:10.3788/AOS202242.1606007

Journals >Acta Optica Sinica >Volume 42 >Issue 16 >Page 1606007 > Article

Acta Optica Sinica
Vol. 42, Issue 16, 1606007 (2022)

Dimmable Visible Light Communication Scheme Based on Punctured Polar Codes

Lin Li, Chao Wang, Jianing Guo, Qi Wu, and Jian Zhang^*

Author Affiliations

Strategic Support Force Information Engineering University, Zhengzhou 450001, Henan , China

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DOI: 10.3788/AOS202242.1606007 Cite this Article Set citation alerts

Lin Li, Chao Wang, Jianing Guo, Qi Wu, Jian Zhang. Dimmable Visible Light Communication Scheme Based on Punctured Polar Codes[J]. Acta Optica Sinica, 2022, 42(16): 1606007 Copy Citation Text

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Fig. 1. Schematic diagram of dimmable VLC system based on punctured polar code

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Schematic diagram of sequences c, u, and x

Fig. 2. Schematic diagram of sequences

c

u

, and

x

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Fig. 3. Influence of L on BER in CA-SCL decoding method

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Fig. 4. Statistical results of code weight for sequence

u

with different parameters. (a) Dimming rate of 0.50; (b) dimming rate of 0.25; (c) dimming rate of 0.20; (d) dimming rate of 0.10

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Fig. 5. Statistical results of sequence

u

on run length with different parameters. (a) Dimming rate of 0.50; (b) dimming rate of 0.25; (c) dimming rate of 0.20; (d) dimming rate of 0.10

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Fig. 6. Comparison of transmission efficiency of several schemes

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Fig. 7. Distribution of indoor illuminance

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Fig. 8. BER performance under different dimming rates for

R_{C}

of 0.50 and 0.75

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Fig. 9. BER performance of proposed scheme and reference ones. (a) Dimming rate of 0.20; (b) dimming rate of 0.25

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Paramter	$γ$	$M$	$L_{P}$	$K$	$L_{C S}$
$N$ =1024， $R_{C}$ =0.50	0.50	1024	0	512	0
	0.25	512	0	256	512
	0.20	512	104	204	616
	0.05	128	26	51	922
$N$ =1024， $R_{C}$ =0.75	0.50	1024	0	768	0
	0.25	512	0	384	512
	0.20	512	104	306	616
	0.05	128	26	76	922

Table 1. Examples of parameters for different dimming rate

γ

Parameters	Length of $u$ sequence	Theoretical mean value	Theoretical standard deviation	Statistical mean value	Statistical standard deviation	Max runs of 0 s or 1 s（occurrences）
$N = 1024$ ， $γ = 0.50$ ， $M = 1024$ ， $L_{P} = 0$	1024	512	16.00	511.9968	16.0102	28（1）
$N = 1024$ ， $γ = 0.25$ ， $M = 512$ ， $L_{P} = 0$	512	256	11.30	256.0093	11.3043	28（1）
$N = 1024$ ， $γ = 0.20$ ， $M = 512$ ， $L_{P} = 104$	408	204	10.10	204.0043	10.0957	28（1）
$N = 1024$ ， $γ = 0.10$ ， $M = 256$ ， $L_{P} = 52$	204	102	7.14	101.9920	7.1418	25（1）

Table 2. Data statistics of

u

sequence

$γ$	Scheme	$K$	$N_{F E C}$	$R_{C}$	$N_{C S}$	$N_{F r}$	$η$
0.50	Standard 1	32	64	0.50	0	80	0.400
	Standard 2	128	160	0.80	0	200	0.640
	Kim-LDPC	576	1152	0.50	0	2304	0.250
	Wang-Polar	512	1024	0.50	0	2048	0.250
	Proposed scheme（ $R_{C} = 0.50$ ）	512	1024	0.50	0	1024	0.500
	Proposed scheme（ $R_{C} = 0.75$ ）	768	1024	0.75	0	1024	0.750
0.20	Standard 1	32	64	0.50	120	200	0.160
	Standard 2	128	160	0.80	300	500	0.256
	Kim-LDPC	288	460	0.63	1384	2304	0.125
	Wang-Polar	256	410	0.62	1228	2048	0.125
	Proposed scheme（ $R_{C} = 0.50$ ）	204	408	0.50	616	1024	0.200
	Proposed scheme（ $R_{C} = 0.75$ ）	306	408	0.75	616	1024	0.300
0.05	Standard 1	32	64	0.50	720	800	0.040
	Standard 2	128	160	0.80	1800	2000	0.064
	Proposed scheme（ $R_{C} = 0.50$ ）	51	102	0.50	922	1024	0.050
	Proposed scheme（ $R_{C} = 0.75$ ）	76	102	0.75	922	1024	0.074

Table 3. Comparison of code parameters and transmission efficiency of various coding schemes under dimming rate of 0.50, 0.20, and 0.05

Parameter	Value
Room size /（m×m×m）	5×5×3
Number of LED lamps per group	36（6×6）
Distance between LED lamps /cm	4
Range of current /mA	400-600
Semi-angle at half power /（°）	60
LED conversion factor /（W·A^-1）	0.44
Refractive index of optical concentrator	1.5
Field of view /（°）	60
System bandwidth /MHz	100
PD responsivity /（A·W^-1）	0.3
Background current /mA	0.1

Table 4. Parameters of transmitter and receiver

Lin Li, Chao Wang, Jianing Guo, Qi Wu, Jian Zhang. Dimmable Visible Light Communication Scheme Based on Punctured Polar Codes[J]. Acta Optica Sinica, 2022, 42(16): 1606007

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