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Performance Evaluation of Beam Shapes in a Two-Step-Precoded Massive MIMO System
| Title: | Performance Evaluation of Beam Shapes in a Two-Step-Precoded Massive MIMO System |
| Authors: | Yamamoto, Jumpei Browse this author | | Nishimura, Toshihiko Browse this author →KAKEN DB | | Ohgane, Takeo Browse this author →KAKEN DB | | Ogawa, Yasutaka Browse this author →KAKEN DB | | Takeda, Daiki Browse this author | | Kishiyama, Yoshihisa Browse this author |
| Keywords: | 5G | | massive MIMO | | higher frequency band | | two-step beamforming |
| Issue Date: | Jun-2020 |
| Publisher: | 電子情報通信学会(The Institute of Electronics, Information and Communication Engineers / IEICE) |
| Journal Title: | IEICE transactions on communications |
| Volume: | E103.B |
| Issue: | 6 |
| Start Page: | 703 |
| End Page: | 711 |
| Publisher DOI: | 10.1587/transcom.2018EBP3271 |
| Abstract: | Massive MIMO is known as a promising technology for multiuser multiplexing in the fifth generation mobile communication system to accommodate the rapidly-increasing traffic. It has a large number of antenna elements and thus provides very sharp beams. As seen in hybrid beamforming, there have already been many papers on the concatenation of two precoders (beamformers). The inner precoder, i.e., a multi-beam former, performs a linear transformation between the element space and the beam space. The outer precoder forms nulls in the limited beam space spanned by selected beams to suppress the inter-user interference. In this two-step precoder, the beam shape is expected to determine the system performance. In this paper, we evaluate the achievable throughput performance for different beam-shaping schemes: a discrete Fourier transform (DFT) beam, Chebyshev weighted beams, and Taylor weighted beam. Simulations show that the DFT beam provides the best performance except the case of imperfect precoding and cell edge SNR of 30 dB. |
| Rights: | copyright©2020 IEICE |
| Type: | article |
| URI: | http://hdl.handle.net/2115/78883 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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