Faster-than-Nyquist non-orthogonal frequency-division multiplexing for visible light communications
Faster-than-Nyquist non-orthogonal frequency-division multiplexing for visible light communications
In this paper, we propose a faster-than-Nyquist (FTN) non-orthogonal frequency-division multiplexing (NOFDM) scheme for visible light communications (VLC) where the multiplexing/demultiplexing employs the inverse fractional cosine transform (IFrCT)/FrCT. Different to the common fractional Fourier transform-based NOFDM (FrFT-NOFDM) signal, FrCTbased NOFDM (FrCT-NOFDM) signal is real-valued, which can be directly applied to the VLC systems without the expensive up-conversion and thus it is more suitable for the cost-sensitive VLC systems. Under the same transmission rate, FrCT-NOFDM signal occupies smaller bandwidth compared to OFDM signal. When the bandwidth compression factor α is set to 0.8, 20% bandwidth saving can be obtained. Therefore, FrCT-NOFDM has higher spectral efficiency and suffers less high-frequency distortion compared to OFDM, which benefits the bandwidthlimited VLC systems. As the simulation results show, bit error rate performance of FrCT-NOFDM with α of 0.9 or 0.8 is better than that of OFDM. Meanwhile, FrCT-NOFDM has a superior security performance. In conclusion, FrCT-NOFDM shows the potential for application in the future VLC systems.
Bandwidth, Delays, Faster-than-Nyquist signaling, fractional cosine transform, Frequency division multiplexing, high spectral efficiency, Integrated circuit modeling, non-orthogonal frequency-division multiplexing, OFDM, Optical noise, Transforms, visible light communications
17933-17941
Zhou, Ji
38ea4d39-0217-4cf5-aebf-6ac9aafedfc2
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Wei, Jinlong
70c61aa6-1125-4ff9-abbb-b470d7a04c21
Cheng, Qixiang
37be975d-ca9a-41d0-86f3-fd272f12c1ed
Zhang, Tiantian
092e88a6-cbef-4b92-b937-c20ff775cd96
Yang, Zhanyu
c9e867bb-8bd0-4b22-83e4-b09d39554896
Yanga, Aiying
14e5dc7a-3106-4691-b748-e4cc23a614b1
Lu, Yueming
76e942b9-7331-42f8-a6e0-d991f59d5f1b
Qiao, Yaojun
9748f1c0-3100-446d-b3d7-e3db366dab34
Zhou, Ji
38ea4d39-0217-4cf5-aebf-6ac9aafedfc2
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Wei, Jinlong
70c61aa6-1125-4ff9-abbb-b470d7a04c21
Cheng, Qixiang
37be975d-ca9a-41d0-86f3-fd272f12c1ed
Zhang, Tiantian
092e88a6-cbef-4b92-b937-c20ff775cd96
Yang, Zhanyu
c9e867bb-8bd0-4b22-83e4-b09d39554896
Yanga, Aiying
14e5dc7a-3106-4691-b748-e4cc23a614b1
Lu, Yueming
76e942b9-7331-42f8-a6e0-d991f59d5f1b
Qiao, Yaojun
9748f1c0-3100-446d-b3d7-e3db366dab34
Zhou, Ji, Wang, Qi, Wei, Jinlong, Cheng, Qixiang, Zhang, Tiantian, Yang, Zhanyu, Yanga, Aiying, Lu, Yueming and Qiao, Yaojun
(2018)
Faster-than-Nyquist non-orthogonal frequency-division multiplexing for visible light communications.
IEEE Access, 6, .
(doi:10.1109/ACCESS.2018.2820100).
Abstract
In this paper, we propose a faster-than-Nyquist (FTN) non-orthogonal frequency-division multiplexing (NOFDM) scheme for visible light communications (VLC) where the multiplexing/demultiplexing employs the inverse fractional cosine transform (IFrCT)/FrCT. Different to the common fractional Fourier transform-based NOFDM (FrFT-NOFDM) signal, FrCTbased NOFDM (FrCT-NOFDM) signal is real-valued, which can be directly applied to the VLC systems without the expensive up-conversion and thus it is more suitable for the cost-sensitive VLC systems. Under the same transmission rate, FrCT-NOFDM signal occupies smaller bandwidth compared to OFDM signal. When the bandwidth compression factor α is set to 0.8, 20% bandwidth saving can be obtained. Therefore, FrCT-NOFDM has higher spectral efficiency and suffers less high-frequency distortion compared to OFDM, which benefits the bandwidthlimited VLC systems. As the simulation results show, bit error rate performance of FrCT-NOFDM with α of 0.9 or 0.8 is better than that of OFDM. Meanwhile, FrCT-NOFDM has a superior security performance. In conclusion, FrCT-NOFDM shows the potential for application in the future VLC systems.
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08326480
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More information
Accepted/In Press date: 24 March 2018
e-pub ahead of print date: 27 March 2018
Keywords:
Bandwidth, Delays, Faster-than-Nyquist signaling, fractional cosine transform, Frequency division multiplexing, high spectral efficiency, Integrated circuit modeling, non-orthogonal frequency-division multiplexing, OFDM, Optical noise, Transforms, visible light communications
Identifiers
Local EPrints ID: 419635
URI: http://eprints.soton.ac.uk/id/eprint/419635
ISSN: 2169-3536
PURE UUID: b1eac470-b572-4db5-b1d4-d5f430823339
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Date deposited: 17 Apr 2018 16:30
Last modified: 15 Mar 2024 19:27
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Contributors
Author:
Ji Zhou
Author:
Qi Wang
Author:
Jinlong Wei
Author:
Qixiang Cheng
Author:
Tiantian Zhang
Author:
Zhanyu Yang
Author:
Aiying Yanga
Author:
Yueming Lu
Author:
Yaojun Qiao
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