Beam Squint-Aware Integrated Sensing and Communications for Hybrid Massive MIMO LEO Satellite Systems

You, Li; Qiang, Xiaoyu; Tsinos, Christos G.; Liu, Fan; Wang, Wenjin; Gao, Xiqi; Ottersten, Björn

doi:10.48550/arxiv.2203.00235

Cited by 3 publications

(4 citation statements)

References 44 publications

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“…In addition, the areas of modulation, signal waveform, multiple access schemes, front haul design, antenna array architecture, and precoding are being proposed for mmWave-massive MIMO systems [140,141]. An integrated performance evaluation and characterization in real-life situations and applications remain an open question [142,143]. Massive MIMO technology raises major concerns that must be resolved.…”

Section: Massive Mimomentioning

confidence: 99%

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

Sabuj¹,

Alam²,

Haider³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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This paper discusses the significance and prospects of low altitude small satellite aerial vehicles to ensure smooth aerial-ground communications for next-generation broadband networks. To achieve the generic goals of fifthgeneration and beyond wireless networks, the existing aerial network architecture needs to be revisited. The detailed architecture of low altitude aerial networks and the challenges in resource management have been illustrated in this paper. Moreover, we have studied the coordination between promising communication technologies and low altitude aerial networks to provide robust network coverage. We talk about the techniques that can ensure userfriendly control and monitoring of the low altitude aerial networks to bring forth wireless broadband connectivity to a new dimension. In the end, we highlight the future research directions of aerial-ground communications in terms of access technologies, machine learning, compressed sensing, and quantum communications.

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Section: Massive Mimomentioning

confidence: 99%

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

Sabuj¹,

Alam²,

Haider³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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“…For this simulation, we assume T = 5 s and λ c = λ r = λ e = 1. Also, E[i] ∽ U (35,45)J, E max = 20 J, and M = K = 2. Moreover, we use η = 0.5 to have a fair balance between the communication and radar performance metrics.…”

Section: B Convergence Behaviormentioning

confidence: 99%

“…The simulation results evaluate the performance of the proposed DFRC designs. Generalizing our proposed approaches to the massive MIMO scenario [7], [43]- [45] by reducing their implementation complexity using the alternating direction method of multipliers (ADMM), which has been studied for the communication only problems [46] is an interesting research direction to communicate and sense large numbers of users and targets using DFRC systems.…”

Section: Conclusion and Future Research Directionmentioning

confidence: 99%

Net-Zero Energy Dual-Functional Radar-Communication Systems

Valiulahi

Masouros

Salem

2023

IEEE Trans. on Green Commun. Netw.

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This paper proposes beamforming designs for netzero energy multi-input multi-output (MIMO) dual-functional radar-communication (DFRC) systems that are powered through energy harvesting (EH) resources and aim to operate autonomously without access to the power grid. We propose a weighted optimization problem to jointly maximize the radar mutual information and minimum quality of service (QoS) requested by communication users subject to energy balancing constraints. The proposed problem is not convex, hence it is tough to solve. We exploit semidefinite relaxation (SDR) and first-order Taylor expansion techniques to relax its non-convexity issues. We then propose an iterative algorithm to obtain the beamforming matrices for the reference scenario when full channel state information (CSI) and energy arrival information (EAI) are available. For the single-target scenario, we show that the proposed optimization contains rank-one solutions. For the multiple targets scenario, by adding auxiliary optimization variables, we show that rank-one matrices can be achieved from the optimal solutions of the proposed optimization. We then propose a robust optimization for the case where only imperfect CSI and EAI are assumed to be known. Finally, numerical simulations show that the proposed DFRC designs are convergent and obtain a graceful trade-off between the radar and communication performances.

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“…ISAC is expected to benefit the SAGIN by improving the utilization of spectral and hardware resources. In [20], the authors investigated the application of ISAC in a massive MIMO low earth orbit (LEO) satellite system and proposed a beam squint-aware scheme exploiting statistical channel state information (CSI) to operate communications and target sensing simultaneously. Compared with satellites and terrestrial BSs, UAVs enjoy much higher mobility, ease of deployment, and may act as aerial ISAC platforms, relays or sensing targets, which present great compatibility with the SAGIN to enhance ISAC services [1].…”

Section: B Rsma-assisted Isac With Saginmentioning

confidence: 99%

Rate-Splitting Multiple Access for 6G -- Part II: Interplay with Integrated Sensing and Communications

Li¹,

Mao²,

Dizdar³

et al. 2022

Preprint

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This letter is the second part of a three-part tutorial focusing on rate-splitting multiple access (RSMA) for 6G. As Part II of the tutorial, this letter addresses the interplay between RSMA and integrated radar sensing and communications (ISAC). In particular, we introduce a general RSMAassisted ISAC architecture, where the ISAC platform has a dual capability to simultaneously communicate with downlink users and probe detection signals to a moving target. Then, the metrics of radar sensing and communications are respectively introduced, followed by a RSMA-assisted ISAC waveform design example which jointly minimizes the Cramér-Rao bound (CRB) of target estimation and maximizes the minimum fairness rate (MFR) amongst communication users subject to the per-antenna power constraint. The superiority of RSMA-assisted ISAC is verified through simulation results in both terrestrial and satellite scenarios. RSMA is demonstrated to be a powerful multiple access and interference management strategy for ISAC, and provides a better communication-sensing trade-off compared with the conventional benchmark strategies. Consequently, RSMA is a promising technology for next generation multiple access (NGMA) and future networks such as 6G and beyond.

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Beam Squint-Aware Integrated Sensing and Communications for Hybrid Massive MIMO LEO Satellite Systems

Cited by 3 publications

References 44 publications

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

Net-Zero Energy Dual-Functional Radar-Communication Systems

Rate-Splitting Multiple Access for 6G -- Part II: Interplay with Integrated Sensing and Communications

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