Mode Selection-Based Channel Feedback Reduction Scheme for Opportunistic Scheduling in OFDMA Systems

Date Added: Oct 2009
Format: PDF

In this paper, the authors present two new feedback reduction schemes, namely the Network Mode selection-based Feedback (NMF) and the User Mode selection-based Feedback (UMF), to reduce the feedback load needed for opportunistic scheduling in the OFDMA downlink system. The two schemes are designed to select either the Selective Feedback (SF) mode which feeds back the fine-grained condition of a part of the channels or the bit-map Based Feedback (BF) mode which feeds back the coarse-grained condition of all the channels using 1-bit for each channel, depending on the channel conditions of the users.