12-core × 3-mode dense space division multiplexed transmission over 40 km employing multi-carrier signals with parallel MIMO equalization. - Takayuki Mizuno; Takayuki Kobayashi; Hidehiko Takara; Akihide Sano; Hiroto Kawakami; T. Nakagawa; Yutaka Miyamoto; Yoshiteru Abe; T. Goh; Manabu Oguma; Taiji Sakamoto; Yusuke Sasaki; et al. (OFC, 2014)