Channel Estimation Using In-Band Pilots for Cell-Free Massive MIMO

研究成果: Conference contribution同行評審

摘要

In this paper, a novel channel estimation technique using in-band pilots (IBPs) for uplink transmission is proposed for cell-free (CF) massive multiple-input multiple-output (MIMO) networks. In particular, compared to traditional superimposed pilot schemes in the time domain, the proposed IBP scheme is operated in the frequency domain, which is more effective and robust due to the removal of interference from the data frequen-cies at the pilot location. We first introduce a system model for the CF massive MIMO with the IBP design. Then, analytical expressions for the mean square error and the normalized mean square error (NMSE) are derived for performance evaluation. Analytical and simulated results reveal that the proposed IBP scheme for CF MIMO outperforms the conventional regular and superimposed pilots in terms of NMSE. Besides, other important insights include the IBP scheme works well in high transmit power regions, and this new channel estimation strategy is more suitable for the scenario with a large number of users since it is not that sensitive to the number of users.

原文English
主出版物標題2023 IEEE Virtual Conference on Communications, VCC 2023
發行者Institute of Electrical and Electronics Engineers Inc.
頁面200-205
頁數6
ISBN(電子)9798350318807
DOIs
出版狀態Published - 2023
事件2023 IEEE Virtual Conference on Communications, VCC 2023 - Virtual, Online, United States
持續時間: 28 11月 202330 11月 2023

出版系列

名字2023 IEEE Virtual Conference on Communications, VCC 2023

Conference

Conference2023 IEEE Virtual Conference on Communications, VCC 2023
國家/地區United States
城市Virtual, Online
期間28/11/2330/11/23

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