System-level assessment of non-orthogonal spectrum sharing via transmit beamforming
conference paper
We assess the system-level performance of nonorthogonal spectrum sharing achieved via maximum sum-rate (SR), Nash bargaining (NB), and zero-forcing (ZF) transmit beamforming techniques. A look-up table based physical layer abstraction and radio resource management mechanisms (including packet scheduling) are proposed and incorporated in system-level simulations, jointly with other important aspects of network operation. In the simulated scenarios, the results show similar system-level performance of SR (or NB) as ZF in the context of spectrum sharing, when combined with maximum sum-rate (or proportional fair) packet scheduler. Further sensitivity analysis also shows similar behavior of all three beamforming techniques with regard to the impact on systemlevel performance of neighbor-cell activity level and feedback error. A more important observation from our results is that, under ideal conditions, the performance enhancement of nonorthogonal spectrum sharing over orthogonal spectrum sharing and fixed spectrum assignment is significant. © 2013 IEEE.
TNO Identifier
489111
ISSN
15502252
ISBN
9781467363372
Article nr.
6692778
Source title
2013 IEEE 77th Vehicular Technology Conference, VTC Spring 2013, 2 June 2013 through 5 June 2013, Dresden
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