Reconfigurable intelligent surface aided amplitude- and phase-modulated downlink transmission
Reconfigurable intelligent surface aided amplitude- and phase-modulated downlink transmission
New reconfigurable intelligent surface (RIS) based amplitude and phase modulation schemes are proposed as an evolution how the phase-only modulation schemes available in the literature. Explicitly, both the amplitude-phase shift keying (A-PSK) and quadrature amplitude-phase shift keying (QA-PSK) are conceived, where the RIS is assumed to be part of a transmitter to deliver information to the multi-antenna aided downlink receiver. In the proposed design, the RIS is partitioned into multiple blocks, and the information bits are conveyed by controlling both the ON-OFF state and the phase shift of the RIS elements in each block. Since the propagation paths spanning from each RIS block to the receiver can be coherently combined as a benefit of appropriately configuring the phase of the RIS elements, the received signal constellations can be designed by controlling both the ON-OFF pattern of the RIS blocks as well as the phase shift of the RIS elements. Both the theoretical analysis and the simulation results show that our proposed RIS-aided modulation schemes outperform the state-of-the-art RIS-based PSK modulation both in terms of its discrete-input-continuous-output memoryless channel (DCMC) capacity and its symbol error probability, especially in the high signal-to-noise-ratio (SNR) region, when considering realistic finite resolution RIS phase shifts.
Constellation diagram, Phase shift keying, Quadrature amplitude modulation, Radio frequency, Reconfigurable intelligent surfaces (RIS), Rician channels, Symbols, Transmitters, amplitudephase modulation, channel capacity, symbol error probability, amplitude-phase modulation
8146-8151
Li, Qingchao
69625501-d192-4a81-861f-f7ac9dd1e882
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Hemadeh, Ibrahim
11f27b54-e3da-4699-bc72-9a3508e76ccf
Shojaeifard, Arman
a2b98bfd-74d2-4b8c-aa8b-839b5a8c4e4c
Mourad, Alain
7a39422e-4c9b-4f76-8653-8551ec8cfb4b
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
1 June 2023
Li, Qingchao
69625501-d192-4a81-861f-f7ac9dd1e882
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Hemadeh, Ibrahim
11f27b54-e3da-4699-bc72-9a3508e76ccf
Shojaeifard, Arman
a2b98bfd-74d2-4b8c-aa8b-839b5a8c4e4c
Mourad, Alain
7a39422e-4c9b-4f76-8653-8551ec8cfb4b
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Li, Qingchao, El-Hajjar, Mohammed, Hemadeh, Ibrahim, Shojaeifard, Arman, Mourad, Alain and Hanzo, Lajos
(2023)
Reconfigurable intelligent surface aided amplitude- and phase-modulated downlink transmission.
IEEE Transactions on Vehicular Technology, 72 (6), .
(doi:10.1109/TVT.2023.3239545).
Abstract
New reconfigurable intelligent surface (RIS) based amplitude and phase modulation schemes are proposed as an evolution how the phase-only modulation schemes available in the literature. Explicitly, both the amplitude-phase shift keying (A-PSK) and quadrature amplitude-phase shift keying (QA-PSK) are conceived, where the RIS is assumed to be part of a transmitter to deliver information to the multi-antenna aided downlink receiver. In the proposed design, the RIS is partitioned into multiple blocks, and the information bits are conveyed by controlling both the ON-OFF state and the phase shift of the RIS elements in each block. Since the propagation paths spanning from each RIS block to the receiver can be coherently combined as a benefit of appropriately configuring the phase of the RIS elements, the received signal constellations can be designed by controlling both the ON-OFF pattern of the RIS blocks as well as the phase shift of the RIS elements. Both the theoretical analysis and the simulation results show that our proposed RIS-aided modulation schemes outperform the state-of-the-art RIS-based PSK modulation both in terms of its discrete-input-continuous-output memoryless channel (DCMC) capacity and its symbol error probability, especially in the high signal-to-noise-ratio (SNR) region, when considering realistic finite resolution RIS phase shifts.
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Reconfigurable_Intelligent_Surface_Aided_Amplitude-_and_Phase-Modulated_Downlink_Transmission
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Accepted/In Press date: 22 January 2023
e-pub ahead of print date: 25 January 2023
Published date: 1 June 2023
Additional Information:
Funding Information:
The work of Lajos Hanzo was supported by Engineering and Physical Sciences Research Council Projects under Grants EP/W016605/1 and EP/X01228X/1 and in part by European Research Council’s Advanced Fellow Grant QuantCom under Grant 789028.
Publisher Copyright:
© 2023 IEEE.
Keywords:
Constellation diagram, Phase shift keying, Quadrature amplitude modulation, Radio frequency, Reconfigurable intelligent surfaces (RIS), Rician channels, Symbols, Transmitters, amplitudephase modulation, channel capacity, symbol error probability, amplitude-phase modulation
Identifiers
Local EPrints ID: 474651
URI: http://eprints.soton.ac.uk/id/eprint/474651
ISSN: 0018-9545
PURE UUID: 4c4b8eb2-ca1b-4644-836d-15d432f2affe
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Date deposited: 28 Feb 2023 17:46
Last modified: 18 Mar 2024 03:59
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Contributors
Author:
Qingchao Li
Author:
Mohammed El-Hajjar
Author:
Ibrahim Hemadeh
Author:
Arman Shojaeifard
Author:
Alain Mourad
Author:
Lajos Hanzo
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