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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/25728

Title: Precoding and Resource Allocation for Multi-user Multi-antenna Broadband Wireless Systems
Authors: Khanafer, Ali
Advisor: Lim, Teng Joon
Doostnejad, Roya
Department: Electrical and Computer Engineering
Keywords: Resource Allocation
Precoding
MIMO-OFDMA
Stream Rate Allocation
Time-Reversal Space-Time Block Coding
Tomlinson-Harashima precoding
Weighted Sum-Rate MAximization
Weighted MMSE Minimization
Issue Date: 6-Jan-2011
Abstract: This thesis is targeted at precoding methods and resource allocation for the downlink of fixed multi-user multi-antenna broadband wireless systems. We explore different utilizations of precoders in transmission over frequency-selective channels. We first consider the weighted sum-rate (WSR) maximization problem for multi-carrier systems using linear precoding and propose a low complexity algorithm which exhibits near-optimal performance. Moreover, we offer a novel rate allocation method that utilizes the signalto- noise-ratio (SNR) gap to capacity concept to choose the rates to allocate to each data stream. We then study a single-carrier transmission scheme that overcomes known impairments associated with multi-carrier systems. The proposed scheme utilizes timereversal space-time block coding (TR-STBC) to orthogonalize the downlink receivers and performs the required pre-equalization using Tomlinson-Harashima precoding (THP).We finally discuss the strengths and weaknesses of the proposed method.
URI: http://hdl.handle.net/1807/25728
Appears in Collections:Master
The Edward S. Rogers Sr. Department of Electrical & Computer Engineering - Master theses

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