Power allocation for orthogonal AF relay systems with outage-based QOS constraints

12 years 8 months ago

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We consider the problem of minimizing the cost of the power required to achieve a speciﬁed level of quality-of-service (QoS) on a point-to-point link that may be assisted by an orthogonal amplifyand-forward (AF) relay. We consider a scenario in which only the distribution of the channel states is available for the design, and the QoS is speciﬁed in terms of a target rate that is to be achievable with a speciﬁed probability of outage. We assign prices to the power expended by the source and the relay, and we seek to minimize the cost of the power required to achieve the speciﬁed QoS. This chance-constrained problem appears to be difﬁcult to solve in its direct form. Instead, we employ the Chebyshev inequality to obtain a deterministic formulation whose solution is guaranteed to provide the required QoS. Although that problem is non-convex, its structure enables the development of an effective algorithm. We apply this design methodology to a system with imperfect channel estim...

Rooholah Hasanizadeh, Timothy N. Davidson

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