Precoding and Resource Allocation for Multi-user Multi-antenna Broadband Wireless Systems
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) maximiza...
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| Language: | en_ca |
| Published: |
2010
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| Online Access: | http://hdl.handle.net/1807/25728 |
| Summary: | 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. |
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