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|Title:||Multiuser MIMO Wireless Communications: Optimal and Efficient Schemes For Rate Maximization and Power Minimization||Authors:||HO WING LONG WINSTON||Keywords:||multiuser, MIMO, wireless, communications, space-time, OFDM||Issue Date:||16-Dec-2008||Citation:||HO WING LONG WINSTON (2008-12-16). Multiuser MIMO Wireless Communications: Optimal and Efficient Schemes For Rate Maximization and Power Minimization. ScholarBank@NUS Repository.||Abstract:||In this thesis a new matrix decomposition and associated transceiver schemes are proposed for the multiple-input multiple-output (MIMO) broadcast channel (BC). The schemes maximize the sum rate via dirty paper coding (DPC) and decompose each user's MIMO channel into parallel subchannels with identical SNRs. Both optimal and efficient schemes are proposed. Following that, the problem of minimizing the sum power given users' rate requirements is considered. The optimal interference-balancing (IB) methods require high complexity. This thesis considers zero-forcing (ZF)-DPC, which permits a closed form solution. Efficient solutions are provided to find the encoding order and subchannel selection. Next, for MIMO orthogonal frequency division multiplexing (MIMO-OFDM) systems, an efficient solution to minimize the sum power given users' rate requirements is proposed. A Lagrangian dual decomposition is used to lower the complexity. Although frequency-flat fading may have an adverse effect on decomposition-based techniques, a concept termed dual proportional fairness handles all fading scenarios seamlessly.||URI:||http://scholarbank.nus.edu.sg/handle/10635/17620|
|Appears in Collections:||Ph.D Theses (Open)|
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