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Broadcasting over uncertain channels with decoding delay constraints

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2 Author(s)
Whiting, P.A. ; Math. Sci. Res. Center, Bell Labs., Murray Hill, NJ ; Yeh, E.M.

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

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Information Theory, IEEE Transactions on  (Volume:52 ,  Issue: 3 )