Underwater photon-counting systems under poisson shot noise: rate analysis and power allocation
Underwater photon-counting systems under poisson shot noise: rate analysis and power allocation
Photon counting is an effective detection technique for weak optical signals in underwater optical wireless communications (UOWC). This paper proposes a new approach for power allocation in an uplink M -ary pulse position modulation (PPM), photo-counting non-orthogonal multiple-access (PhC-NOMA) system. Different from existing techniques in photon-counting systems, the new approach supports consistent duty cycles across underwater devices and adjusts the transmit rates of the devices through their transmit powers, thereby avoiding the delays of duty cycle adjustments and supporting high-speed transmissions. Power allocation is non-trivial in photon-counting systems due to signal-dependent Poisson shot noises. As a key contribution, we derive the exact and asymptotic expressions for the achievable rate of the M -ary PPM PhC-NOMA system with the signal-dependent Poisson shot noise and multiuser interference considered. With the expressions, we reveal the received power at the base station (BS) is minimized when their minimum data rate requirements are delivered and can be solved using an incremental algorithm. We also asymptotically maximize the photon efficiency of the devices while preventing the saturation of the receiving photon detector, using Karush-Kuhn-Tucker (KKT) conditions. Simulations show that our approach can reduce the received power at the BS by up to 25% and double the photon efficiency, as compared to the existing techniques.
NOMA, Optical pulses, Optical saturation, Optical sensors, Photon counting, Photonics, Resource management, Wireless sensor networks, discrete-time Poisson multiple access channel (DTP-MAC), power allocation, underwater optical wireless communication (UOWC), discrete-time poisson multiple access channel (DTP-MAC)
5152-5168
Chen, YongKang
064bda12-2a62-4fda-9216-c9c9c3fa7af7
Zhou, Xiaolin
430d63af-54f0-48d7-8f26-97dcf393fb57
Ni, Wei
9271a983-c6ed-4814-8238-68efffb92278
Wang, Xin
c20f2c75-932a-4e7d-a75e-155aa301dc30
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
1 September 2023
Chen, YongKang
064bda12-2a62-4fda-9216-c9c9c3fa7af7
Zhou, Xiaolin
430d63af-54f0-48d7-8f26-97dcf393fb57
Ni, Wei
9271a983-c6ed-4814-8238-68efffb92278
Wang, Xin
c20f2c75-932a-4e7d-a75e-155aa301dc30
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Chen, YongKang, Zhou, Xiaolin, Ni, Wei, Wang, Xin and Hanzo, Lajos
(2023)
Underwater photon-counting systems under poisson shot noise: rate analysis and power allocation.
IEEE Transactions on Communications, 71 (9), .
(doi:10.1109/TCOMM.2023.3292910).
Abstract
Photon counting is an effective detection technique for weak optical signals in underwater optical wireless communications (UOWC). This paper proposes a new approach for power allocation in an uplink M -ary pulse position modulation (PPM), photo-counting non-orthogonal multiple-access (PhC-NOMA) system. Different from existing techniques in photon-counting systems, the new approach supports consistent duty cycles across underwater devices and adjusts the transmit rates of the devices through their transmit powers, thereby avoiding the delays of duty cycle adjustments and supporting high-speed transmissions. Power allocation is non-trivial in photon-counting systems due to signal-dependent Poisson shot noises. As a key contribution, we derive the exact and asymptotic expressions for the achievable rate of the M -ary PPM PhC-NOMA system with the signal-dependent Poisson shot noise and multiuser interference considered. With the expressions, we reveal the received power at the base station (BS) is minimized when their minimum data rate requirements are delivered and can be solved using an incremental algorithm. We also asymptotically maximize the photon efficiency of the devices while preventing the saturation of the receiving photon detector, using Karush-Kuhn-Tucker (KKT) conditions. Simulations show that our approach can reduce the received power at the BS by up to 25% and double the photon efficiency, as compared to the existing techniques.
Text
Underwater Photon Counting Systemms under Poisson Shot Noise Rate Analysis and Power Allocation
- Accepted Manuscript
Restricted to Repository staff only until 6 July 2025.
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e-pub ahead of print date: 6 July 2023
Published date: 1 September 2023
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Publisher Copyright:
© 1972-2012 IEEE.
Keywords:
NOMA, Optical pulses, Optical saturation, Optical sensors, Photon counting, Photonics, Resource management, Wireless sensor networks, discrete-time Poisson multiple access channel (DTP-MAC), power allocation, underwater optical wireless communication (UOWC), discrete-time poisson multiple access channel (DTP-MAC)
Identifiers
Local EPrints ID: 481280
URI: http://eprints.soton.ac.uk/id/eprint/481280
ISSN: 0090-6778
PURE UUID: a6642632-60f4-447e-8c8e-5a082f52ccb9
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Date deposited: 22 Aug 2023 16:38
Last modified: 18 Mar 2024 02:36
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Contributors
Author:
YongKang Chen
Author:
Xiaolin Zhou
Author:
Wei Ni
Author:
Xin Wang
Author:
Lajos Hanzo
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