A Novel Optical Spatial Modulation OFDM Based on Complex Constellation Mapping with Hartley Transform

Xianying Xu; Dianwu Yue

doi:10.3788/CJL202148.0906002

Journals >Chinese Journal of Lasers >Volume 48 >Issue 9 >Page 0906002 > Article

Chinese Journal of Lasers
Vol. 48, Issue 9, 0906002 (2021)

A Novel Optical Spatial Modulation OFDM Based on Complex Constellation Mapping with Hartley Transform

Xianying Xu^1,2 and Dianwu Yue^1,*

Author Affiliations

¹College of Information Science and Technology, Dalian Maritime University, Dalian,Liaoning 116026, China

²College of Electrical Engineering, Dalian University of Science and Technology, Dalian, Liaoning 116052, China

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DOI: 10.3788/CJL202148.0906002 Cite this Article Set citation alerts

Xianying Xu, Dianwu Yue. A Novel Optical Spatial Modulation OFDM Based on Complex Constellation Mapping with Hartley Transform[J]. Chinese Journal of Lasers, 2021, 48(9): 0906002 Copy Citation Text

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Fig. 1. NCH-OFDM system block diagram

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Fig. 2. BER of NCH-OFDM varying with distance between PDs

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Fig. 3. Performance comparison between RP detection and ZF detection for NCH-OFDM

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Fig. 4. Performance comparison between GP detection and ZF detection for NCH-OFDM

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Fig. 5. BER performance comparison between NCH-OFDM and ACO-OFDM or DCO-OFDM(d_PD=0.8 m). (a) NCH-OFDM versus ACO-OFDM; (b) NCH-OFDM versus DCO-OFDM

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Fig. 6. BER performance comparison of NCH-OFDM, NDC-OFDM and SH-OFDM(d_PD=0.8 m)

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Fig. 7. BER performance comparison between NCH-OFDM and GLIM-OFDM

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Optical OFDM scheme	NCH-OFDM	NDC-OFDM	SH-OFDM	GLIM-OFDM
Based transform	C2RT-FHT	FFT	FHT	FFT
Constellation form	Complex (M-QAM)	Complex (M-QAM)	Real (M-PAM, BPSK)	Complex (M-QAM)
Constellation size	M	M	$\sqrt[]{M}$	M
Spectral efficiency /(bit·s^-1·Hz^-1)	$\frac{N - 2}{2 N}$ lb M	$\frac{N - 2}{2 N}$ lb M	lb $\sqrt[]{M}$	lb M
Minimum required LEDs number	2	2	2	4
Computational complexity	Real multiplication:N·lb N; real addition: 3N/2·lb N+N	Real multiplication: 2N·lb N; Real addition: 3N·lb N	Real multiplication:N·lb N ; real addition: 3N/2·lb N	Real multiplication: 2N·lb N; real addition: 3N·lb N

Table 1. Comparison of optical spatial modulation OFDM systems

Parameter	Value
Dimensions of the room /(m×m×m)	5×5×3
FHT or FFT size N	256
Lambertian order β	1
Gain of the optical filter T_s(ψ)	1
Concentrator gain g_c(ψ)	1
Field of view ψ_c /(°)	85
Area of PD A_r /cm²	1
LED position /m	LED1: (1.25, 2.5, 3);LED2: (3.75, 2.5, 3)
PD position /m	A:PD1: (2.45, 2.5, 1);PD2: (2.55, 2.5, 1)B:PD1: (2.3, 2.5, 1);PD2: (2.7, 2.5, 1)C:PD1: (2.1, 2.5, 1);PD2: (2.9, 2.5, 1)

Table 2. Physical parameter settings of simulation environment

Xianying Xu, Dianwu Yue. A Novel Optical Spatial Modulation OFDM Based on Complex Constellation Mapping with Hartley Transform[J]. Chinese Journal of Lasers, 2021, 48(9): 0906002

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