Performance Analysis of Rate Splitting Multiple Access Based Vortex Wave Communications

Chen, Ruirui; Cheng, Fengzhi; Lin, Jinyang; Liang, Liping; Sun, Yanjing

doi:10.1109/lwc.2022.3165711

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…The PU set R p can be found in the r s search ring according to the updated search radius r s (step 5). If the number of the PUs is not smaller than two, the two CUs k 1 and k 2 that have the minimum d k1,k2 ∈ [2R fea (z c ), D max ] are selected from the PU set R p and added to the CU set R c (step [4][5][6][7][8][9][10][11]. The above process should be repeated until the CUs are selected by the iteration of the r s search ring, i.e., execute the inner and outer while loop (steps 3-13).…”

Section: Cooperative Oam Wireless Communication Schemementioning

confidence: 99%

“…To further improve the spectrum efficiency, orbital angular momentum (OAM) is expected to achieve a breakthrough in the information transmission approach [3]. OAM describes the characteristic of electromagnetic wave rotating around the propagation axis, which produces the phase wavefront of electromagnetic wave in a vortex shape [4]. The electromagnetic wave with OAM is called vortex wave, and different OAM modes are orthogonal with each other [5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cooperative Orbital Angular Momentum Wireless Communications

Chen,

Cheng,

Lin

et al. 2024

IEEE Trans. Veh. Technol.

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Orbital angular momentum (OAM) mode multiplexing has the potential to achieve high spectrum-efficiency communications at the same time and frequency by using orthogonal mode resource. However, the vortex wave hollow divergence characteristic results in the requirement of the largescale receive antenna, which makes users hardly receive the OAM signal by size-limited equipment. To promote the OAM application in the next 6G communications, this paper proposes the cooperative OAM wireless (COW) communication scheme, which can select the cooperative users (CUs) to form the aligned antennas by size-limited user equipment. First, we derive the feasible radial radius and selective waist radius to choose the CUs in the same circle with the origin at the base station. Then, based on the locations of CUs, the waist radius is adjusted to form the receive antennas and ensure the maximum intensity for the CUs. Finally, the cooperative formation probability is derived in the closed-form solution, which can depict the feasibility of the proposed COW communication scheme. Furthermore, OAM beam steering is used to expand the feasible CU region, thus achieving higher cooperative formation probability. Simulation results demonstrate that the derived cooperative formation probability in mathematical analysis is very close to the statistical probability of cooperative formation, and the proposed COW communication scheme can obtain higher spectrum efficiency than the traditional scheme due to the effective reception of the OAM signal.

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Section: Cooperative Oam Wireless Communication Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cooperative Orbital Angular Momentum Wireless Communications

Chen,

Cheng,

Lin

et al. 2024

IEEE Trans. Veh. Technol.

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“…The capabilities of RSMA can aid in flexible waveform design by addressing practical challenges such as inter-channel interference, massive asynchronous transmissions, latency due to processing delays, doppler effect and reception under imperfections to achieve high SE and EE performance. RSMA also has great potential of integrating with other emerging waveforms such as vortex wave [17], etc. Furthermore, RSMA can aid waveform design for other enabling technologies such as joint radar and communication.…”

Section: Applications and Future Workmentioning

confidence: 99%

Rate-Splitting Multiple Access for 6G -- Part I: Principles, Applications and Future Works

Mishra,

Mao,

Dizdar

et al. 2022

Preprint

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This letter is the first part of a three-part tutorial focusing on rate-splitting multiple access (RSMA) for 6G. As Part I of the tutorial, the letter presents the basics of RSMA and its applications in light of 6G. To begin with, we first delineate the design principle and basic transmission frameworks of downlink and uplink RSMA. We then illustrate the applications of RSMA for addressing the challenges of various potential enabling technologies and use cases, consequently making it a promising next generation multiple access (NGMA) scheme for future networks such as 6G and beyond. We briefly discuss the challenges of RSMA and conclude the letter. In continuation of Part I, we will focus on the interplay of RSMA with integrated sensing and communication, and reconfigurable intelligent surfaces, respectively in Part II and Part III of this tutorial.

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“…Rate splitting (RS) technique combines the advantages of SDMA and NOMA by the flexible balance between the interference and desired signal [15], [16]. By dividing the transmission information into private message and common message , RS technique can serve multiple users at the same time and frequency [17].…”

Section: Introductionmentioning

confidence: 99%

Precoding-Based Downlink OAM-MIMO Communications With Rate Splitting

Chen,

Lin,

Zhang

et al. 2023

IEEE Trans. on Broadcast.

Self Cite

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Orbital angular momentum (OAM) and rate splitting (RS) are the potential key techniques for the future wireless communications. As a new orthogonal resource, OAM can achieve the multifold increase of spectrum efficiency to relieve the scarcity of the spectrum resource, but how to enhance the privacy performance imposes crucial challenge for OAM communications. RS technique divides the information into private and common parts, which can guarantee the privacies for all users. In this paper, we integrate the RS technique into downlink OAM-MIMO communications, and study the precoding optimization to maximize the sum capacity. First, the concentric uniform circular arrays (UCAs) are utilized to construct the downlink transmission framework of OAM-MIMO communications with RS. Particularly, users in the same user pair utilize RS technique to obtain the information and different user pairs use different OAM modes. Then, we derive the OAM-MIMO channel model, and formulate the sum capacity maximization problem. Finally, based on the fractional programming, the optimal precoding matrix is obtained to maximize the sum capacity by using quadratic transformation. Extensive simulation results show that by using the proposed precoding optimization algorithm, OAM-MIMO communications with RS can achieve higher sum capacity than the traditional communication schemes.

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Performance Analysis of Rate Splitting Multiple Access Based Vortex Wave Communications

Cited by 6 publications

References 21 publications

Cooperative Orbital Angular Momentum Wireless Communications

Cooperative Orbital Angular Momentum Wireless Communications

Rate-Splitting Multiple Access for 6G -- Part I: Principles, Applications and Future Works

Precoding-Based Downlink OAM-MIMO Communications With Rate Splitting

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