Resource Allocation for Fading Orthogonal Relay Channels
Mathematics of Relaying and Cooperation in Communication Networks
April 10,2006 04:30 PM to 05:00 PM
Speakers:
Veeravalli, Venu
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Abstract: |
An orthogonal relay channel model is studied, where the source transmits to the relay and destination in one channel, and the relay transmits to the destination in an orthogonal channel. Separate power constraints are assumed at the source and relay. The three links are subject to fading, and the fading state information is assumed to be known at both the transmitter and receiver. The source and relay can hence allocate their power adaptively according to the instantaneous channel state information. An achievable rate for this model is derived, and is optimized over the power allocation at the source and relay. This optimization is a max-min problem. A general technique for solving this max-min problem is introduced and applied to derive the optimal power allocation. The analysis is extended to the joint optimization of power and channel resource (time and bandwidth) allocations. In these scenarios, the maximum capacity of the channel (optimized over all possible power and channel resource allocations) is obtained for some special cases.
Joint work with Yingbin Liang |
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