On the achievable throughput region of multiple-access fading channels with QoS constraints

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Effective capacity, which provides the maximum constant arrival rate that a given service process can support while satisfying statistical delay constraints, is analyzed in a multiuser scenario. In particular, we study the achievable effective capacity region of the users in multiaccess fading channels (MAC) in the presence of quality of service (QoS) constraints. We assume that channel side information (CSI) is available at both the transmitters and the receiver, and superposition coding technique with successive decoding is used. When the power is fixed at the transmitters, we show that varying the decoding order with respect to the channel state can significantly increase the achievable throughput region. For a two-user case, we obtain the optimal decoding strategy when the users have the same QoS constraints. Meanwhile, it is shown that time-division multiple-access (TDMA) can achieve better performance than superposition coding with fixed successive decoding order at the receiver side for certain QoS constraints. For power and rate adaptation, we determine the optimal power allocation policy with fixed decoding order at the receiver side. Numerical results are provided to demonstrate our results.

Original languageEnglish (US)
Title of host publicationIEEE International Conference on Communications
StatePublished - 2010
Externally publishedYes
Event2010 IEEE International Conference on Communications, ICC 2010 - Cape Town, South Africa
Duration: May 23 2010May 27 2010


Other2010 IEEE International Conference on Communications, ICC 2010
CountrySouth Africa
CityCape Town


ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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