NEWS
11月9日，由北京邮电大学和中国移动牵头，中国电信、中国联通、中兴通讯、东南大学、北京交通大学等多家企业和高校参与的《智能超表面技术白皮书：信道建模与仿真》在第三届智能超表面技术论坛首次发布。本次论坛由智能超表面技术联盟（RISTA）主办，会议采用线上与线下融合的方式进行，吸引了来自全球百余家高校、企业、科研院所、政府智库以及行业组织的专家、学者和学生参加。其中，线下参会人数超过400人，线上人数超过3万人。
该白皮书专门介绍了 RIS 研究的信道建模和仿真方法，旨在为明年 3GPP 6G 研究[1-2]中 RIS 的性能评估设定基线[3]。本白皮书通过对超表面器件进行广泛的电磁场分析和对传播信道的各种实际测量[4-5]，提出了可重构智能表面的可行信道模型，平衡了 3GPP 中仿真的建模精度和实用性。更具体地说，RIS 本身是确定性建模的，而基于几何的统计模型 （GBSM） 用于级联通道的每个跳度。在模拟方法和参数中，RIS 级联链路被添加到定义了 RIS 特定参数的传统网络布局中。同时白皮书给出了RIS信道模型可能需要纳入考虑的近场、非平稳[6-9]等新型特性。所提出的信道模型和仿真方法可以作为 3GPP 中 RIS 研究的起点。
白皮书可以通过RISTA联盟官方公众号下载，也可识别下方二维码下载阅读。
参考文献
[1]J. Zhang, et al., "Channel Measurement, Modeling, and Simulation for 6G: A Survey and Tutorial," arXiv preprint arXiv:2305.16616, 2023.
[2]张建华，等. "6G信道新特性与建模研究：挑战、进展与展望," 中国科学: 信息科学, vol. 54, no. 5, pp. 1114-1143, 2024.
[3]H. Gong, et al., "How to Extend 3-D GBSM to RIS Cascade Channel With Non-Ideal Phase Modulation?," IEEE Wireless Communications Letters, vol. 13, no. 2, pp. 555-559, Feb. 2024.
[4]Y. Li, et al., "Path Loss Modeling for the RIS-Assisted Channel in a Corridor Scenario in mmWave Bands," in *Proc. IEEE Globecom Workshops (GC Wkshps)*, Rio de Janeiro, Brazil, 2022, pp. 1478-1483.
[5]J. Zhang, et al., "Cascaded Channel Modeling and Experimental Validation for RIS-Assisted Communication System," in *Proc. IEEE Globecom Workshops (GC Wkshps)*, 2024, accepted, yet to be presented.
[6]Z. Yuan, et al., "Spatial Non-Stationary Near-Field Channel Modeling and Validation for Massive MIMO Systems," IEEE Trans. Antennas Propag., vol. 71, no. 1, pp. 921-933, Jan. 2023.
[7]Z. Yuan, et al., "Efficient Ray-Tracing Simulation for Near-Field Spatial Non-Stationary mmWave Massive MIMO Channel and Its Experimental Validation," IEEE Trans. Wireless Commun., vol. 23, no. 8, pp. 8910-8923, 2024.
[8]Z. Yuan, et al., "On Phase Mode Selection in the Frequency-Invariant Beamformer for Near-Field mmWave Channel Characterization," IEEE Trans. Antennas Propag., vol. 71, no. 11, pp. 8975-8986, 2023.
[9]H. Miao, et al., "Analysis of Near-Field Effects, Spatial Non-Stationary Characteristics Based on 11-15 GHz Channel Measurement in Indoor Scenario," in *Proc. IEEE Signal Processing Advances in Wireless Communications (SPAWC)*, Sep. 2024.
[10]Y. Zhang, et al., "Latest Progress for 3GPP ISAC Channel Modeling Standardization," Sci. China Inf. Sci., vol. 67, no. 11, 2024.
[11]J. Zhang, et al., "Integrated Sensing and Communication Channel: Measurements, Characteristics, and Modeling," IEEE Commun. Mag., vol. 62, no. 6, pp. 98-104, 2024.
[12]P. Tang, et al., "Preliminary Perspectives on 3GPP Standardization of the Propagation Channel Model for 6G FR3 Bands," submitted to Sci. China Inf. Sci.
[13]J. Zhang, et al., "New Mid-Band for 6G: Several Considerations from the Channel Propagation Characteristics Perspective," IEEE Commun. Mag., pp. 1-6, 2024.
[14]H. Miao, et al., "Sub-6 GHz to mmWave for 5G-Advanced and Beyond: Channel Measurements, Characteristics and Impact on System Performance," IEEE J. Sel. Areas Commun., vol. 41, no. 6, pp. 1945-1960, 2023.
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