Constellation Rotation Aided Modulation Design for the Multi-User SWIPT-NOMA

Zhao, Yanzheng; Hu, Jie; Ding, Zhiguo; Yang, Kun

doi:10.1109/icc.2018.8423037

Cited by 15 publications

(12 citation statements)

References 10 publications

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“…Apart from the front-end transceiver and air-interface design, the potential of modulation design on improving the SWIPT performance has not been well understood. Unfortunately, few works studied the impact of modulation design in the NOMA-SWIPT system, except for our first attempt [33]. We proposed a constellation rotation modulation scheme in [33] for a threeuser NOMA-SWIPT system, which includes a pair of WIT users and a single WPT user.…”

Section: Contributionsmentioning

confidence: 99%

“…The modulated signal destined to the WIT user pair is constructively superimposed in order to maximise its WPT performance. However, our design in [33] is only suitable for supporting a pair of WIT users, whose requested symbols are superimposed on a single sub-carrier (or a single resource block). In practice, we have to map symbols of different WIT users to the multiple sub-carriers available.…”

Section: Contributionsmentioning

confidence: 99%

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Joint Interleaver and Modulation Design For Multi-User SWIPT-NOMA

Zhao

Ding

et al. 2019

IEEE Trans. Commun.

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Radio frequency (RF) signals can be relied upon for conventional wireless information transfer (WIT) and for challenging wireless power transfer (WPT), which triggers the significant research interest in the topic of simultaneous wireless information and power transfer (SWIPT). By further exploiting the advanced non-orthogonal-multiple-access (NOMA) technique, we are capable of improving the spectrum efficiency of the resource-limited SWIPT system. In our SWIPT system, a hybrid access point (H-AP) superimposes the modulated symbols destined to multiple WIT users by exploiting the power-domain NOMA, while WPT users are capable of harvesting the energy carried by the superposition symbols. In order to maximise the amount of energy transferred to the WPT users, we propose a joint design of the energy interleaver and the constellation rotation based modulator in the symbol-block level by constructively superimposing the symbols destined to the WIT users in the power domain. Furthermore, a transmit power allocation scheme is proposed to guarantee the symbol-error-ratio (SER) of all the WIT users. By considering the sensitivity of practical energy harvesters, the simulation results demonstrate that our scheme is capable of substantially increasing the WPT performance without any remarkable degradation of the WIT performance.

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Section: Contributionsmentioning

confidence: 99%

Section: Contributionsmentioning

confidence: 99%

Joint Interleaver and Modulation Design For Multi-User SWIPT-NOMA

Zhao

Ding

et al. 2019

IEEE Trans. Commun.

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“…However, the constellation rotation may result in the reduction of the minimum Euclidean distance between adjacent superposition symbols, as portrayed in Fig.5, which may deteriorate the WIT performance. An optimal constellation rotation angle should be chosen in order to achieve a balance between the WPT and the WIT performance [15].…”

Section: B Constellation Rotationmentioning

confidence: 99%

Modulation and Coding Design for Simultaneous Wireless Information and Power Transfer

Zhao

Yang

2019

IEEE Commun. Mag.

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In order to satisfy the power-thirst of the IoT devices and thus extend their lifespan, the radio frequency (RF) signal aided wireless power transfer (WPT) is exploited for remotely charging. Carefully coordinating both the WPT and wireless information transfer (WIT) yields an emerging research trend in simultaneous wireless information and power transfer (SWIPT). However, the SWIPT system designed by assuming Gaussian distributed input signals may suffer from a substantial performance degradation in practice, when the finite alphabetical input is considered. In this article, we will provide a design guide of the coding controlled SWIPT and study the modulation design in both the single-user and multiuser SWIPT systems. We hope that this guide may push the SWIPT a step closer from theory to practice.

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“…A great deal of efforts have been invested in SWIPT spanning from the PHY layer transceiver design [4] to the MAC layer resource allocation [5] and networking [6]. Surprisingly, the research on the information theoretical essence of the SWIPT has not become prosperous, since Varshney et al [7] firstly studied the tradeoff between the maximum mutual information and the energy harvesting requirement in different channels.…”

Section: Introductionmentioning

confidence: 99%

“…The SWIPT performance of(2,4,8)-level unary codes having the crossover probability ω = 0.2 of the Z-channel: Minimum WPT requirement versus (a) maximum mutual information and versus (b) average codeword length .…”

mentioning

confidence: 99%

Performance Analysis of the Unary Coding Aided SWIPT in a Single-User Z-Channel

Yang

et al. 2019

2019 IEEE Global Communications Conference (GLOBECOM)

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Radio frequency (RF) signal based simultaneous wireless information and power transfer (SWIPT) has emerged as a promising technique for satisfying both the communication and charging requests of the massively deployed IoT devices. Different from the physical layer and the medium-access-control layer design for coordinating the SWIPT in the RF band, we study its coding-level control from the information theoretical perspective. Due to its practical implementation of the decoder and its flexibility on the codeword structure, the unary code is chosen as a potential joint information and energy encoder. By conceiving the classic Z-channel, the mutual information and the energy harvesting performance of the unary coding aided SWIPT transceiver is analysed. Furthermore, the optimal codeword distribution is obtained for maximising the mutual information, while satisfying the minimum energy harvesting requirement. Our theoretical analysis and the optimal coding design are demonstrated by the numerical results.

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Constellation Rotation Aided Modulation Design for the Multi-User SWIPT-NOMA

Cited by 15 publications

References 10 publications

Joint Interleaver and Modulation Design For Multi-User SWIPT-NOMA

Joint Interleaver and Modulation Design For Multi-User SWIPT-NOMA

Modulation and Coding Design for Simultaneous Wireless Information and Power Transfer

Performance Analysis of the Unary Coding Aided SWIPT in a Single-User Z-Channel

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