On the Benefits of Bandwidth Limiting in Decentralized Vector Multiple Access Channels

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Executive Summary

The authors study the network spectral efficiency of decentralized vector Multiple Access Channels (MACs) when the number of accessible dimensions per transmitter is strategically limited. Considering each dimension as a frequency band, they call this limiting process Bandwidth Limiting (BL). Assuming that each transmitter maximizes its own data rate by water-filling over the available frequency bands, they consider two scenarios. In the first scenario, transmitters use non-intersecting sets of bands (spectral resource partition), and in the second one, they freely exploit all the available frequency bands (spectral resource sharing).

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