Channel Estimation for RIS Assisted Wireless Communications-Part I: Fundamentals, Solutions, and Future Opportunities
The reconfigurable intelligent surface (RIS) with low hardware cost and energy consumption has been recognized as a potential technique for future 6G communications to enhance coverage and capacity. To achieve this goal, accurate channel state information (CSI) in RIS assisted wireless communication...
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| Veröffentlicht in: | IEEE communications letters 2021-05, Vol.25 (5), p.1398-1402 |
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| creator | Wei, Xiuhong Shen, Decai Dai, Linglong |
| description | The reconfigurable intelligent surface (RIS) with low hardware cost and energy consumption has been recognized as a potential technique for future 6G communications to enhance coverage and capacity. To achieve this goal, accurate channel state information (CSI) in RIS assisted wireless communication system is essential for the joint beamforming at the base station (BS) and the RIS. However, channel estimation is challenging, since a large number of passive RIS elements cannot transmit, receive, or process signals. In the first part of this invited paper, we provide an overview of the fundamentals, solutions, and future opportunities of channel estimation in the RIS assisted wireless communication system. It is noted that a new channel estimation scheme with low pilot overhead will be provided in the second part of this letter. |
| doi_str_mv | 10.1109/LCOMM.2021.3052822 |
| format | Article |
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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Array signal processing Beamforming Channel estimation Communications systems Energy consumption Estimation Receiving antennas Reconfigurable intelligent surface (RIS) Signal processing Signal processing algorithms Uplink Wireless communication Wireless communication systems Wireless communications |
| title | Channel Estimation for RIS Assisted Wireless Communications-Part I: Fundamentals, Solutions, and Future Opportunities |
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