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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,...
This paper proposes an iterative receiver employing multiuser detection (MUD) and channel estimation for uplink MIMO-OFDM interleave-division multiple access (IDMA). IDMA can perform low-complexity MUD by employing a low-rate channel code and an individual interleaver for each user, and is expected to improve spectrum efficiency in mobile communications. However, an excellent channel estimator has...
This paper introduces a 60-GHz millimeter-wave experimental system for single-carrier (SC) transmission, and verifies an effectiveness of a SC receiver employing decision-directed phase noise compensation (DD-PNC) by the experimental system. A relatively large phase noise occurs in 60-GHz transceivers based on the silicon technology, and significantly degrades transmission performances in the multi-level...
This paper introduces a 60-GHz millimeter-wave experimental system for single-carrier (SC) transmission, and verifies an effectiveness of a SC receiver employing decision-directed phase noise compensation (DD-PNC) by the experimental system. A relatively large phase noise occurs in 60-GHz transceivers based on the silicon technology, and significantly degrades transmission performances in the multi-level...
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