Title :
Multi-access fading channels: delay-limited capacities
Author :
Hanly, Stephen V. ; Tse, David N C
Author_Institution :
Dept. of Electr. Eng., Melbourne Univ., Parkville, Vic., Australia
Abstract :
We consider the multi-access, white-noise, fading channel, and introduce a notion of delay-limited capacity, which is the maximum rate achievable with delay independent of how slow the fading is. We characterize the delay-limited capacity region and the associated optimal power allocation schemes. We show that successive decoding is optimal, and the optimal decoding order and power allocation can be found explicitly as a function of the fading states; this is a consequence of an underlying polymatroid structure that we exploit
Keywords :
channel capacity; decoding; delays; fading channels; multi-access systems; delay-limited capacity; fading states; maximum rate achievable; multi-access fading channels; optimal decoding order; optimal power allocation; polymatroid structure; successive decoding; white-noise; Channel capacity; Concurrent computing; Decoding; Delay; Fading; Gaussian channels; Gaussian noise; Information theory; Lagrangian functions;
Conference_Titel :
Information Theory, 1998. Proceedings. 1998 IEEE International Symposium on
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-5000-6
DOI :
10.1109/ISIT.1998.709002