On the discrete-input continuous-output memoryless channel capacity of layered ACO-OFDM
On the discrete-input continuous-output memoryless channel capacity of layered ACO-OFDM
Layered Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (LACO-OFDM) has been proposed for optical communications and has attracted much attention, thanks to its flexibility in terms of power vs. spectral efficiency. In this article, we propose algorithms for optimizing the Discrete-input Continuous-output Memoryless Channel (DCMC) capacity of LACO-OFDM. Then, an algorithm is proposed for maximizing the capacity for twin-layer LACO-OFDM by optimizing the power sharing between the layers. This is followed by the conception of a more general algorithm applicable to LACO-OFDM having an arbitrary number of layers. Numerical results are provided for quantifying the capacity improvement attained by the proposed algorithm. Moreover, an adaptive scheme is proposed for adjusting the number of layers to be used for maximizing the capacity at different SNRs.
LACO-OFDM, adaptive, capacity, optimization, power sharing
4955-4968
Zhang, Xiaoyu
ea1ec5dd-5b9f-4ba9-b420-c05e771a5ae3
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
15 September 2020
Zhang, Xiaoyu
ea1ec5dd-5b9f-4ba9-b420-c05e771a5ae3
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, Xiaoyu, Chen, Sheng and Hanzo, Lajos
(2020)
On the discrete-input continuous-output memoryless channel capacity of layered ACO-OFDM.
IEEE Journal of Lightwave Technology, 38 (18), , [9098085].
(doi:10.1109/JLT.2020.2996541).
Abstract
Layered Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (LACO-OFDM) has been proposed for optical communications and has attracted much attention, thanks to its flexibility in terms of power vs. spectral efficiency. In this article, we propose algorithms for optimizing the Discrete-input Continuous-output Memoryless Channel (DCMC) capacity of LACO-OFDM. Then, an algorithm is proposed for maximizing the capacity for twin-layer LACO-OFDM by optimizing the power sharing between the layers. This is followed by the conception of a more general algorithm applicable to LACO-OFDM having an arbitrary number of layers. Numerical results are provided for quantifying the capacity improvement attained by the proposed algorithm. Moreover, an adaptive scheme is proposed for adjusting the number of layers to be used for maximizing the capacity at different SNRs.
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Accepted/In Press date: 13 May 2020
e-pub ahead of print date: 21 May 2020
Published date: 15 September 2020
Keywords:
LACO-OFDM, adaptive, capacity, optimization, power sharing
Identifiers
Local EPrints ID: 441027
URI: http://eprints.soton.ac.uk/id/eprint/441027
ISSN: 0733-8724
PURE UUID: 122a240d-b5e2-425a-a125-2663b8cc4c53
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Date deposited: 27 May 2020 16:55
Last modified: 29 Oct 2022 02:03
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Author:
Xiaoyu Zhang
Author:
Sheng Chen
Author:
Lajos Hanzo
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