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Affiliation of Author(s):School of Computer Science and Information Engineering, Hefei University of Technology
Journal:2023 IEEE Global Communications Conference
Funded by:the National Natural Science Foundation of China under Grants 61971176 and 61901156,the Anhui Provi
Key Words:Spectral efficiency, Precoding, Frequency-domain analysis, Modulation, OFDM modulation, Numerical models, Wideband
Abstract:Massive multiple-input multiple-output (mMIMO) channels in wideband systems may exhibit the severe delay spread, due to its spatial- and frequency-wideband (dual wideband) effects. The typical orthogonal frequency division multiplexing (OFDM) technology have to insert a larger number of cyclic prefix (CP) to overcome the inter-symbol interference (ISI) induced by delay spread. The additional CP overhead will counteract the improvement of spectral efficiency by the large antenna array. To address the issue, this paper proposes a structure OFDM modulation approach to reduce the CP overhead for wideband mMIMO systems with dual-wideband effects. Specifically, we propose a joint spatial precoding and frequency domain equalization scheme to maximize the system spectrum efficiency, where the closed-form solutions of precoding vectors and equalization matrices are derived by exploiting the unique characteristic of composite channel matrix. Numerical simulations indicate that the proposed scheme can effectively deal with the dual-wideband effects and significantly improve the spectral efficiency with low CP overhead
Co-author:Lizheng Xu,Haiyang Zhang,Caihong Kai
First Author:Wei Huang
Indexed by:Essay collection
Discipline:Engineering
Document Type:C
Page Number:4050-4055
Translation or Not:no
Date of Publication:2023-12-04
Included Journals:EI