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• W2402401607 abstract "For a time-correlated channel, we consider the differential feedback of the geometrical mean decomposition (GMD) precoder, which is known to be optimal for a number of criteria. When the channel varies slowly, we can expect the optimal GMD precoders of consecutive channel uses to be close. We consider the feedback of the so-called differential precoder and show that it lies in a neighborhood of the identity matrix using matrix perturbation theory. Furthermore the radius of the neighborhood is proportional to a time-correlation parameter. Such a characterization is crucial for efficient quantization of the differential precoder. Simulations are given to demonstrate that, with a small feedback rate, the performance of the proposed differential GMD comes close to the case when perfect channel state information is available to the transmitter." @default.
• W2402401607 created "2016-06-24" @default.
• W2402401607 creator A5048176907 @default.
• W2402401607 creator A5079522722 @default.
• W2402401607 date "2016-03-01" @default.
• W2402401607 modified "2023-09-28" @default.
• W2402401607 title "Feedback of differential precoder for geometrical mean decomposition systems" @default.
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• W2402401607 doi "https://doi.org/10.1109/icassp.2016.7472403" @default.
• W2402401607 hasPublicationYear "2016" @default.
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