Transmission Strategies in Multiple Access Fading Channels with Statistical QoS Constraints

Details Transmission Strategies in Multiple Access Fading Channels with Statistical QoS Constraints Transmission Strategies in Multiple Access Fading Channels with Statistical QoS Constraints

2010-09-16

arxiv.org/abs/1009.3253v1

Computer Science

Information Theory

Scientific paper

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, the effective capacity region of fading multiple access channels (MAC) in the presence of quality of service (QoS) constraints is studied. Perfect channel side information (CSI) is assumed to be available at both the transmitters and the receiver. It is initially assumed the transmitters send the information at a fixed power level and hence do not employ power control policies. Under this assumption, the performance achieved by superposition coding with successive decoding techniques is investigated. It is shown that varying the decoding order with respect to the channel states can significantly increase the achievable throughput region. In the two-user case, the optimal decoding strategy is determined for the scenario in which the users have the same QoS constraints. The performance of orthogonal transmission strategies is also analyzed. It is shown that for certain QoS constraints, time-division multiple-access (TDMA) can achieve better performance than superposition coding if fixed successive decoding order is used at the receiver side. In the subsequent analysis, power control policies are incorporated into the transmission strategies. The optimal power allocation policies for any fixed decoding order over all channel states are identified. For a given variable decoding order strategy, the conditions that the optimal power control policies must satisfy are determined, and an algorithm that can be used to compute these optimal policies is provided.

Affiliated with

Also associated with

No associations

Rating

Transmission Strategies in Multiple Access Fading Channels with Statistical QoS Constraints does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Transmission Strategies in Multiple Access Fading Channels with Statistical QoS Constraints, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission Strategies in Multiple Access Fading Channels with Statistical QoS Constraints will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-28186