Non-linear pre-coding for MIMO multi-user downlink transmissions with different QoS requirements

摘要: An efficient non-linear pre-filtering technique based on Tomlinson-Harashima pre-coding (THP) has recently been proposed by Liu and Krzymien for multiple antenna multi-user systems. The algorithm is the Zero-Forcing (ZF) criterion assumes a number of transmit antennas equals to active users. In contrast other methods, it ensures fair treatment users providing them same signal-to-noise ratio. multimedia applications, however, several types information with different quality-of-service (QoS) must be supported. Motivated above problem, in present work we design ZF THP-based networks which base station allocates power according QoS requirement each user. doing so, consider system may less than antennas. As will see, such case there exists an infinite solutions satisfying criterion. We address problem finding best using as optimality maximization ratios at all mobile terminals.