Reliability Analysis of Stochastic Geometry-based Multi-UAV-aided LEO-Satcom under OTFS

Hu, Junfan; Jin, Yi; Shi, Jia; Li, Xuan; Dai, Zhenfei; Li, Zan

doi:10.1109/iswcs56560.2022.9940412

Cited by 4 publications

(2 citation statements)

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“…Recently, a few studies have investigated the potential of OTFS over satellite links. In [30]- [32], the authors investigated the secrecy and reliability performance of OTFSbased low earth orbit (LEO) satellite communication systems, where the closed-form outage probability was derived, showing the superiority of OTFS compared to OFDM. In [33], the performance of OTFS under LEO downlink channel was studied, where OTFS is observed to be robust across various channel models.…”

Section: Introductionmentioning

confidence: 99%

“…It is worth noting that the PAPR of OTFS grows with the symbol number [44], [45]. On the other hand, the variations of subcarrier number and symbol number also affect the [21]- [25], [30]- [32], [34], [36] [26]- [29], [33] This paper Novel waveforms/ transmission schemes Compatibility with NR frame structure Symbol re-segmentation Multipath fading High Doppler shifts Nonlinear distortions of HPA Fair comparison under NTN deployments diversity gain and complexity greatly. Coexisting with NR, as well as trading-off among diversity, PAPR, and complexity, are vital problems to be solved for waveform design in NTN uplink.…”

Section: Introductionmentioning

confidence: 99%

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Block Scalable OFDM-Based Waveform for NTN Uplink–A Comparative Study of Multiple Candidate Waveforms Over NTN Scenarios Using NR Numerology

Chen,

Liu,

et al. 2024

IEEE Access

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Non terrestrial network (NTN) has been regarded as an important component of beyond 5G communication. The 3rd Generation Partnership Project (3GPP) has officially started studies on NTN for the purpose of integrating satellites with New Radio (NR) terrestrial networks. However, the NR defined orthogonal frequency division multiplexing (OFDM) waveform is susceptible to doubly selective fading and nonlinear distortions in the NTN uplink, thus leading to severe performance loss. In this paper, a type of block scalable OFDM (BS-OFDM) waveform is proposed, which has modified subcarrier and sub-symbol segmentation when compared to the conventional NR defined OFDM. With our proposed framework, block scalable discrete Fourier transform spread OFDM (BS-DFT-s-OFDM) and block scalable orthogonal time frequency space (BS-OTFS) can also be implemented. To obtain a comprehensive understanding of different waveforms, performance metrics concerning peak to average power ratio (PAPR), total degradation (TD), bit error rate (BER), and complexity are presented. The simulation results demonstrate that the proposed block scalable waveforms can obtain better performance and lower complexity than existing NR waveforms in different NTN uplink scenarios, and can therefore be promising candidate waveforms for NR NTN.

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Section: Introductionmentioning

confidence: 99%