Title :
Superposition Coding Strategies: Design and Experimental Evaluation
Author :
Vanka, S. ; Srinivasa, S. ; Gong, Z. ; Vizi, P. ; Stamatiou, K. ; Haenggi, M.
fDate :
7/1/2012 12:00:00 AM
Abstract :
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.
Keywords :
Gaussian processes; approximation theory; channel coding; orthogonal codes; radio transmitters; radiofrequency interference; software radio; Gaussian approximation; SC systems; interference; interuser interference; multiuser transmission scheme; off-the-shelf point-to-point channel codes; orthogonal schemes; packet-error constraint; radio transmitter; software-radio system; superposition coding strategies; time division multiplexing; user signals; Decoding; Encoding; Indexes; Interference; Libraries; Reliability; Wireless communication; GNURadio; software-defined radio; superposition coding; universal software radio peripheral;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2012.051512.111622
