Structured OFDM Design for Massive MIMO Systems with Dual-Wideband Effects
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所属单位：School of Computer Science and Information Engineering, Hefei University of Technology
发表刊物：2023 IEEE Global Communications Conference
项目来源：the National Natural Science Foundation of China under Grants 61971176 and 61901156,the Anhui Provi
关键字：Spectral efficiency, Precoding, Frequency-domain analysis, Modulation, OFDM modulation, Numerical models, Wideband
摘要：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
合写作者：Lizheng Xu,Haiyang Zhang,Caihong Kai
第一作者：Wei Huang
论文类型：论文集
学科门类：工学
文献类型：C
页面范围：4050-4055
是否译文：否
发表时间：2023-12-04
收录刊物：EI