DMT Optimal Codes Constructions for Multiple-Access MIMO Channel
Hsiao-Feng Francis Lu, Camilla Hollanti, Roope Vehkalahti, Jyrki Lahtonen · IEEE Transactions on Information Theory · 2011
Explicit code constructions for multiple-input multiple-output (MIMO) multiple-access channels (MAC) with$K$users are presented in this paper. The first construction is dedicated to the case of symmetric MIMO-MAC where all the users have the same number of transmit antennas$n_{t}$and transmit at the same level of per-user multiplexing gain$r$. Furthermore, we assume that the users transmit in an independent fashion and do not cooperate. The construction is systematic for any values of$K$,$n_{t}$and$r$. It is proved that this newly proposed construction achieves the optimal MIMO-MAC diversity-multiplexing gain tradeoff (DMT) provided by Tseat high-$\hbox{SNR}$regime.