Journal
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
Volume 39, Issue 6, Pages 1576-1589Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSAC.2021.3071850
Keywords
6G wireless communication systems; THz channel model; ultra-massive MIMO; long traveling path; space-time-frequency non-stationarity
Funding
- National Key Research and Development Program of China [2018YFB1801101]
- National Natural Science Foundation of China (NSFC) [61960206006, 61901109]
- Frontiers Science Center for Mobile Information Communication and Security
- High Level Innovation and Entrepreneurial Research Team Program in Jiangsu
- High Level Innovation and Entrepreneurial Talent Introduction Program in Jiangsu
- Research Fund of National Mobile Communications Research Laboratory, Southeast University [2020B01, 2021B02]
- Fundamental Research Funds for the Central Universities [2242020R30001]
- EU H2020 RISE TESTBED2 project [872172]
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This paper proposes a novel three-dimensional space-time-frequency non-stationary geometry-based stochastic model for sixth generation terahertz wireless communication systems. The model has the capability to capture various channel characteristics in different THz application scenarios and can be easily adjusted to fit specific scenarios by modifying parameters. The accuracy and generality of the model are verified through simulation results compared with channel measurements.
In this paper, a novel three-dimensional (3D) space-time-frequency (STF) non-stationary geometry-based stochastic model (GBSM) is proposed for the sixth generation (6G) terahertz (THz) wireless communication systems. The proposed THz channel model is very general having the capability to capture different channel characteristics in multiple THz application scenarios such as indoor scenarios, device-to-device (D2D) communications, ultra-massive multiple-input multiple-output (MIMO) communications, and long traveling paths of users. Also, the generality of the proposed channel model is demonstrated by the fact that it can easily be reduced to different simplified channel models to fit specific scenarios by properly adjusting model parameters. The proposed general channel model takes into consideration the non-stationarities in space, time, and frequency domains caused by ultra-massive MIMO, long traveling paths, and large bandwidths of THz communications, respectively. Statistical properties of the proposed general THz channel model are investigated. The accuracy and generality of the proposed channel model are verified by comparing the simulation results of the relative angle spread and root mean square (RMS) delay spread with corresponding channel measurements.
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