Carrier-less amplitude and phase modulated visible light communication system based on a constellation-shaping scheme

Zhixin Wang; Mengjie Zhang; Siyuan Chen; Nan Chi

doi:doi:10.3788/COL201715.030602

Chinese Optics Letters, 2017, 15 (3): 030602, Published Online: Jul. 25, 2018

Carrier-less amplitude and phase modulated visible light communication system based on a constellation-shaping scheme Download： 1060次

Zhixin Wang Mengjie Zhang Siyuan Chen Nan Chi ^*

Author Affiliations

State Key Lab of ASIC, Department of Communication Science and Engineering, Fudan University, Shanghai 200433, China

Figures & Tables

Fig. 1. Constellation of QAM-32 before and after shaping.

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Fig. 2. V-I curve of red LED.

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Fig. 3. Experimental setup of the VLC system employing constellation-shaping CAP and CMMA.

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Fig. 4. Measured BER of CAP-32 versus different input signal Vpps at Vleds equal 3.5 and 1.9 V. (a) Constellation of normal QAM-32. (b) Constellation of shaping QAM-32.

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Fig. 5. Measured BER of CAP-32 and CAP-16 versus different input signal Vpps at a Vled equal 3.5 V. (a) CAP-16, (b) shaping CAP-16, (c) CAP-32, and (d) shaping CAP-32.

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Fig. 6. Measured BER performance and working range of CAP-32 versus different Vleds and Vpps (a,c) without constellation shaping, and (b,d) with constellation shaping.

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Table1. Differences Between Ref. [14] and Our Report

Items	Ref. [14]	Proposed
QAM order	8-QAM	32-QAM
Modulation formats	Single carrier	CAP
Constellation generation	Regular polygon design	Geometric transformation
Experiment	Yes	Yes
Distance	0.5 m (in door)	1 m (in door)
Comparing group	Four 8-QAM constellations	Two 32-QAM constellations

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Zhixin Wang, Mengjie Zhang, Siyuan Chen, Nan Chi. Carrier-less amplitude and phase modulated visible light communication system based on a constellation-shaping scheme[J]. Chinese Optics Letters, 2017, 15(3): 030602.

Carrier-less amplitude and phase modulated visible light communication system based on a constellation-shaping scheme Download： 1060次

Fig. 1. Constellation of QAM-32 before and after shaping.

Fig. 2. V-I curve of red LED.

Fig. 3. Experimental setup of the VLC system employing constellation-shaping CAP and CMMA.

Fig. 4. Measured BER of CAP-32 versus different input signal Vpps at Vleds equal 3.5 and 1.9 V. (a) Constellation of normal QAM-32. (b) Constellation of shaping QAM-32.

Fig. 5. Measured BER of CAP-32 and CAP-16 versus different input signal Vpps at a Vled equal 3.5 V. (a) CAP-16, (b) shaping CAP-16, (c) CAP-32, and (d) shaping CAP-32.

Fig. 6. Measured BER performance and working range of CAP-32 versus different Vleds and Vpps (a,c) without constellation shaping, and (b,d) with constellation shaping.

Table1. Differences Between Ref. [14] and Our Report

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Carrier-less amplitude and phase modulated visible light communication system based on a constellation-shaping scheme Download： 1060次

Fig. 1. Constellation of QAM-32 before and after shaping.

Fig. 2. V-I curve of red LED.

Fig. 3. Experimental setup of the VLC system employing constellation-shaping CAP and CMMA.

Fig. 4. Measured BER of CAP-32 versus different input signal Vpps at Vleds equal 3.5 and 1.9 V. (a) Constellation of normal QAM-32. (b) Constellation of shaping QAM-32.

Fig. 5. Measured BER of CAP-32 and CAP-16 versus different input signal Vpps at a Vled equal 3.5 V. (a) CAP-16, (b) shaping CAP-16, (c) CAP-32, and (d) shaping CAP-32.

Fig. 6. Measured BER performance and working range of CAP-32 versus different Vleds and Vpps (a,c) without constellation shaping, and (b,d) with constellation shaping.

Table1. Differences Between Ref. [14] and Our Report

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