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
- Chinese Optics Letters
- Vol. 15, Issue 3, 030602 (2017)
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.
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Table 1. Differences Between Ref. [14] and Our Report
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