Achievable Rate Region of Multiple Access with Linearly Precoded Parallel Block-Fading MIMO Channels

The goal is to derive achievable rate region of multiple access MIMO channel with finite number of flat-fading parallel observations when novel user-wise independent linear precoding (pre-equalizing) is performed as the second level encoding procedure for each user separately. No channel state information is assumed to be known at transmitters and each user wants to communicate at the maximum but constant rate during the frame consisted of finite number of parallel channels with block-fading channel realizations. Employing the linear transmit energy preserving precoding we aim at better performance in the terms of outage capacity which is essential for application services relying on sustainable transmission even through the channel with instantaneous very poor channel conditions