期刊
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
卷 11, 期 7, 页码 2628-2639出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2012.051512.111622
关键词
GNURadio; superposition coding; software-defined radio; universal software radio peripheral
资金
- NSF [CNS-1016742, 0830651]
- DARPA/IPTO IT-MANET program [W911NF-07-1-0028]
- Division of Computing and Communication Foundations
- Direct For Computer & Info Scie & Enginr [0830651] Funding Source: National Science Foundation
We design and implement a software-radio system for Superposition Coding (SC), a multiuser transmission scheme that deliberately introduces interference among user signals at the transmitter, using a library of off-the-shelf point-to-point channel codes. We experimentally determine the set of rate-pairs achieved by this transmission scheme under a packet-error constraint. Our results suggest that SC can provide substantial gains in spectral efficiencies over those achieved by orthogonal schemes such as Time Division Multiplexing. Our findings also question the practical utility of the Gaussian approximation for the inter-user interference in Superposition-Coded systems.
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