Beam Squint-Aware Integrated Sensing and Communications for Hybrid Massive MIMO LEO Satellite Systems
arXiv:2203.00235 · doi:10.1109/JSAC.2022.3196114
Abstract
The space-air-ground-sea integrated network (SAGSIN) plays an important role in offering global coverage. To improve the efficient utilization of spectral and hardware resources in the SAGSIN, integrated sensing and communications (ISAC) has drawn extensive attention. Most existing ISAC works focus on terrestrial networks and can not be straightforwardly applied in satellite systems due to the significantly different electromagnetic wave propagation properties. In this work, we investigate the application of ISAC in massive multiple-input multiple-output (MIMO) low earth orbit (LEO) satellite systems. We first characterize the statistical wave propagation properties by considering beam squint effects. Based on this analysis, we propose a beam squint-aware ISAC technique for hybrid analog/digital massive MIMO LEO satellite systems exploiting statistical channel state information. Simulation results demonstrate that the proposed scheme can operate both the wireless communications and the target sensing simultaneously with satisfactory performance, and the beam-squint effects can be efficiently mitigated with the proposed method in typical LEO satellite systems.
arXiv commentto appear in IEEE Journal on Selected Areas in Communications
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Cited by in corpus (7)
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- An I2I Inpainting Approach for Efficient Channel Knowledge Map Construction
- Ubiquitous Integrated Sensing and Communications for Massive MIMO LEO Satellite Systems
- Spatial Path Index Modulation in mmWave/THz-Band Integrated Sensing and Communications
- The Curse of Beam-Squint in ISAC: Causes, Implications, and Mitigation Strategies
- A Unified Approach for Beam-Split Mitigation in Terahertz Wideband Hybrid Beamforming
- A Bistatic Sensing System in Space-Air-Ground Integrated Networks