Abstract:
We examine the feasibility of the signal-to-noise-and-interference (SINR) guarantees for downlink transmissions in relay-enhanced OFDMA networks that feature stationary u...Show MoreMetadata
Abstract:
We examine the feasibility of the signal-to-noise-and-interference (SINR) guarantees for downlink transmissions in relay-enhanced OFDMA networks that feature stationary users. The constraints are as follows: (i) the SINR of every user exceeds a certain threshold and (ii) the transmit power for each transmission is less than a certain threshold. We first derive a set of necessary and sufficient feasibility conditions for the specific case in which a user i served by the relay station shares at most one subchannel with a user j served by the base station. These conditions are a function of the target SINR values and the channel gains, and derived using a property of an M-matrix. We then extend these results to the case of networks featuring multiple base stations and multiple relays. Our conditions to check the feasibility can be easily implemented in practice.
Date of Conference: 12-15 December 2011
Date Added to IEEE Xplore: 01 March 2012
ISBN Information: