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To actualize the 5th generation (5G) radio access network with a super high bit rate and high capacity, small cells using both higher frequency bands and Massive MIMO technology are needed. Massive MIMO OFDM transmissions in the 20-GHz band at 20 Gbps that take advantage of higher beamforming (BF) gain have been studied. However, Massive MIMO OFDM causes a high peak to average power ratio (PAPR) because...
This paper proposes a peak-to-average power ratio (PAPR) reduction method that maintains an effect of linear precoding by block diagonalization (BD) for multiuser (MU) MIMO-OFDM systems. In the downlink MU-MIMO-OFDM, BD orthogonalizes multiple signals of all users by the linear precoding using channel state information, but the transmitted signal still has high PAPR due to OFDM characteristics. Therefore,...
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