Abstract | ||
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The performance of user cooperation that results when users forward packets for each other in a multiaccess network is ompared to that of dedicated-relay cooperation which results from using a dedicated wireless relay when the users do not cooperate. Using the total transmit and processing power consumed at all nodes as a cost metric, the outage probabilities achieved by dynamic decode-and-forward (DDF) and amplify-and-forward (AF) are compared for the two networks. A geometry-inclusive high signal-to-noise ratio (SNR) outage analysis in conjunction with area-averaged numerical simulations shows that in a K-user time-duplexed multiaccess network, user and dedicated-relay cooperation achieve a maximum diversity per user of K and 2, respectively, under both DDF and AF. However, when accounting for energy costs of processing and communication, dedicated-relay cooperation can be more energy efficient than user cooperation, i.e., dedicated-relay cooperation achieves coding (SNR) gains, particularly in the low SNR regime, that override the diversity advantage of user cooperation. |
Year | DOI | Venue |
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2011 | 10.4304/jcm.6.4.330-339 | JCM |
Keywords | DocType | Volume |
cooperation | Journal | 6 |
Issue | Citations | PageRank |
4 | 2 | 0.40 |
References | Authors | |
8 | 3 |
Name | Order | Citations | PageRank |
---|---|---|---|
Lalitha Sankar | 1 | 600 | 50.94 |
Gerhard Kramer | 2 | 445 | 34.21 |
Narayan B. Mandayam | 3 | 1471 | 161.08 |