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Performance analysis of layered ACO-OFDM

Performance analysis of layered ACO-OFDM
Performance analysis of layered ACO-OFDM
Layered asymmetrically clipped optical orthogonal frequency division multiplexing (LACO-OFDM) has been proposed for improving the spectral efficiency of conventional asymmetrically clipped optical OFDM (ACO-OFDM). Multiple base layers that are orthogonal in the frequency domain are sequentially superimposed to form LACO-OFDM, where each superimposed layer fills the empty subcarriers left by the previous layer. As our contribution, the bit error ratio (BER) considering the effect of thermal noise, clipping distortion, inter-layer interference and the bit rate difference between layers is analysed in this paper. Since the BER performance of LACO-OFDM is closely related to its peak-to-average power ratio (PAPR) distribution, we also provide the analytical expression of the PAPR distribution in this paper, which quantifies how the number of layers in LACOOFDM reduces the PAPR. As a further advance, we propose a tone-injection aided PAPR reduction design for LACO-OFDM, which in turn improves the BER performance. Simulations are provided for verifying both the analytical BER performance and the PAPR distribution of LACO-OFDM. The results show that the expressions derived match well with the simulations. Furthermore, the PAPR reduction method proposed attains a 5 dB PAPR reduction at the 10^-3 probability-point of the complementary cumulative distribution function (CCDF), as well as a better BER performance than the original LACO-OFDM scheme.
Layered asymmetrically clipped optical orthogonal frequency division multiplexing (LACO-OFDM), bit error ratio (BER), inter-layer interference, clipping distortion, peak-to-average power ratio (PAPR), tone injection
2169-3536
18366-18381
Zhang, Xiaoyu
ea1ec5dd-5b9f-4ba9-b420-c05e771a5ae3
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Zhang, Rong
3be8f78f-f079-4a3f-a151-76ecd5f378f4
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, Xiaoyu
ea1ec5dd-5b9f-4ba9-b420-c05e771a5ae3
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Zhang, Rong
3be8f78f-f079-4a3f-a151-76ecd5f378f4
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Zhang, Xiaoyu, Wang, Qi, Zhang, Rong, Chen, Sheng and Hanzo, Lajos (2017) Performance analysis of layered ACO-OFDM. IEEE Access, 5, 18366-18381. (doi:10.1109/ACCESS.2017.2748057).

Record type: Article

Abstract

Layered asymmetrically clipped optical orthogonal frequency division multiplexing (LACO-OFDM) has been proposed for improving the spectral efficiency of conventional asymmetrically clipped optical OFDM (ACO-OFDM). Multiple base layers that are orthogonal in the frequency domain are sequentially superimposed to form LACO-OFDM, where each superimposed layer fills the empty subcarriers left by the previous layer. As our contribution, the bit error ratio (BER) considering the effect of thermal noise, clipping distortion, inter-layer interference and the bit rate difference between layers is analysed in this paper. Since the BER performance of LACO-OFDM is closely related to its peak-to-average power ratio (PAPR) distribution, we also provide the analytical expression of the PAPR distribution in this paper, which quantifies how the number of layers in LACOOFDM reduces the PAPR. As a further advance, we propose a tone-injection aided PAPR reduction design for LACO-OFDM, which in turn improves the BER performance. Simulations are provided for verifying both the analytical BER performance and the PAPR distribution of LACO-OFDM. The results show that the expressions derived match well with the simulations. Furthermore, the PAPR reduction method proposed attains a 5 dB PAPR reduction at the 10^-3 probability-point of the complementary cumulative distribution function (CCDF), as well as a better BER performance than the original LACO-OFDM scheme.

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More information

Accepted/In Press date: 21 August 2017
e-pub ahead of print date: 31 August 2017
Published date: 2017
Keywords: Layered asymmetrically clipped optical orthogonal frequency division multiplexing (LACO-OFDM), bit error ratio (BER), inter-layer interference, clipping distortion, peak-to-average power ratio (PAPR), tone injection

Identifiers

Local EPrints ID: 413940
URI: http://eprints.soton.ac.uk/id/eprint/413940
ISSN: 2169-3536
PURE UUID: 77e8945b-9d42-4a89-b44f-23ab8bac4ab0
ORCID for Xiaoyu Zhang: ORCID iD orcid.org/0000-0002-0793-889X
ORCID for Qi Wang: ORCID iD orcid.org/0000-0003-2645-5807
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 11 Sep 2017 16:31
Last modified: 13 Apr 2021 02:07

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Contributors

Author: Xiaoyu Zhang ORCID iD
Author: Qi Wang ORCID iD
Author: Rong Zhang
Author: Sheng Chen
Author: Lajos Hanzo ORCID iD

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