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Throughput Gains with Limited Feedback in Cooperative Relay Networks

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Title: Throughput Gains with Limited Feedback in Cooperative Relay Networks
Author: Ahmed, Nasir; Aazhang, Behnaam
Type: Conference Paper
Citation: N. Ahmed and B. Aazhang,"Throughput Gains with Limited Feedback in Cooperative Relay Networks," in IEEE International Conference on Wireless Networks, Communications and Mobile Computing,
Abstract: In this work, we consider delay-constrained systems in cooperative relay networks, and derive methods to maximize the throughput when a limited feedback link to the transmitter nodes exist. We derive the optimal rate control policy, and show that with just a few bits of feedback, most of the gains of the perfect feedback rate control policy are achievable. We maximize the throughput for popular methods of transmission in a network such as relaying, routing, and direct transmission. It is observed that for a finite rate of feedback, the throughput maximizing outage probability can be relatively high. This suggests using higher rate codes, and allowing some outages in an effort to increase the overall throughput. Interestingly, for large average power constraints, power control is unnecessary to maximize the throughput. On the other hand, for small average power constraints, we show that power control is more important than rate control.
Date Published: 2005-06-01

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  • ECE Publications [1034 items]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students