Broadcasting over uncertain channels with decoding delay constraints

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Philip A. Whiting, Edmund M. Yeh

Published: 2006, Last Modified: 03 Oct 2025IEEE Trans. Inf. Theory 2006EveryoneRevisionsBibTeXCC BY-SA 4.0
Abstract: We examine communication over slowly varying flat-fading additive white Gaussian noise (AWGN) channels with delayed channel state information (CSI) feedback to the transmitter and finite decoding delay constraints. Under a block-fading channel model, it is shown that a broadcast strategy maximizes the expected reliably received rate when the decoding delay constraint is one block and in certain cases when the delay constraint is two blocks. The latter requires a new analysis of underlying parallel Gaussian broadcast channels (GBCs) which are not degraded in the same direction