Relay vs. User Cooperation in Time-Duplexed Multiaccess Networks - Computer Science > Information TheoryReport as inadecuate




Relay vs. User Cooperation in Time-Duplexed Multiaccess Networks - Computer Science > Information Theory - Download this document for free, or read online. Document in PDF available to download.

Abstract: The performance of user-cooperation in a multi-access network is compared tothat of using a wireless relay. Using the total transmit and processing powerconsumed at all nodes as a cost metric, the outage probabilities achieved bydynamic decode-and-forward DDF and amplify-and-forward AF are compared forthe two networks. A geometry-inclusive high signal-to-noise ratio SNR outageanalysis in conjunction with area-averaged numerical simulations shows thatuser and relay cooperation achieve a maximum diversity of K and 2 respectivelyfor a K-user multiaccess network under both DDF and AF. However, whenaccounting for energy costs of processing and communication, relay cooperationcan be more energy efficient than user cooperation, i.e., relay cooperationachieves coding SNR gains, particularly in the low SNR regime, that overridethe diversity advantage of user cooperation.



Author: Lalitha Sankar, Gerhard Kramer, Narayan B. Mandayam

Source: https://arxiv.org/







Related documents