Improving power allocation to MIMO eigenbeams under imperfect channel estimation |
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Authors: | Willink TJ |
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Affiliation: | Commun. Res. Centre, Ottawa, Ont., Canada; |
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Abstract: | Eigenbeamforming exploits the spatial diversity of the MIMO channel by multiplexing data substreams along orthogonal modes. Estimation errors result in self-interference, which must be taken into account in the selection of modes for transmission and the allocation of transmitter power. Using perturbation analysis to evaluate the self-interference, a technique is proposed for determining the power allocation which achieves a specified performance, based only on the information available at the receiver. |
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