Non-Orthogonal Pilot Analysis for Single-Cell Massive MIMO Circumstances

• LI Pengxiang

  Beijing University of Posts and Telecommunications

• GAO Yuehong

  Beijing University of Posts and Telecommunications

• LI Zhidu

  Beijing University of Posts and Telecommunications

• YANG Hongwen

  Beijing University of Posts and Telecommunications

抄録

This paper analyzes the performance of single-cell massive multiple-input multiple-output (MIMO) systems with non-orthogonal pilots. Specifically, closed-form expressions of the normalized channel estimation error and achievable uplink capacity are derived for both least squares (LS) and minimum mean square error (MMSE) estimation. Then a pilot reconstruction scheme based on orthogonal Procrustes principle (OPP) is provided to reduce the total normalized mean square error (NMSE) of channel estimations. With these reconstructed pilots, a two-step pilot assignment method is formulated by considering the correlation coefficient among pilots to reduce the maximum NMSE. Based on this assignment method, a step-by-step pilot power allocation scheme is further proposed to improve the average uplink signal-to-interference and noise ratio (SINR). At last, simulation results demonstrate the superiority of the proposed approaches.

収録刊行物

• IEICE Transactions on Communications

  IEICE Transactions on Communications E102.B (4), 901-912, 2019-04-01

  一般社団法人 電子情報通信学会

キーワード

• non-orthogonal pilots
• single-cell massive MIMO
• normalized channel estimation error
• achievable uplink capacity

詳細情報

• CRID: 1390001288142140160
• NII論文ID: 130007621788
• DOI: 10.1587/transcom.2017ebp3459
• ISSN: 17451345
• ISSN: 09168516
• Web Site: https://www.jstage.jst.go.jp/article/transcom/E102.B/4/E102.B_2017EBP3459/_pdf
• 本文言語コード: en
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