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This paper proposes a method for adaptively controlling the admission of interference to users for our previously proposed layered partially non-orthogonal block diagonalization (BD) precoding method for downlink multiuser multiple-input multiple-output (MIMO) transmission that employs cooperation among multiple base stations (BS). The proposed method is applicable when some of the instantaneous channel...
This paper investigates a precoding method in downlink multiuser multiple-input multiple-output (MIMO) transmission employing multiple base station (BS) cooperation where the sets of user equipment basically feedback the instantaneous channel state information (CSI) only to the nearest BS, but the users near the cell edge additionally feedback the instantaneous CSI to the second nearest BS among the...
This paper investigates the application of a previously proposed adaptive peak-to-average power ratio (PAPR) reduction method based on clipping and filtering (CF) to block diagonalization-based multiuser multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) transmission. Assuming that the total number of receiver antennas is less than that for the transmitter antennas,...
We consider a precoding method in downlink multiuser multiple-input multiple-output (MIMO) transmission with multiple base station (BS) cooperation where some of the instantaneous channel state information (CSI) is not available at the BSs. The proposed precoding method is based on block diagonalization of the channel matrix. However, since some elements of the channel matrix are unknown, we allow...
This paper presents field experimental results of peak frequency efficiency of approximately 50 bps/Hz, i.e., 4.9 Gbps packet transmission in a 100-MHz channel bandwidth, using 12-by-12 MIMO-OFDM focusing on the influence of fading correlation between the transmitter and receiver antennas using vertically polarized antennas. Maximum likelihood detection (MLD)-based signal detection was employed to...
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