Partial Channel Quality Information Feedback in Multiuser Relay Networks Over Nakagami- $m$ Fading

摘要: We propose a new partial feedback scheme in multiuser relay networks (MRNs) where source communicates with $K$ destinations via relay. focus on practical network model orthogonal frequency division multiple access (OFDMA) is adopted the downlink and only limited overhead supported uplink. For this model, we consider that OFDMA spectrum consists of $M_{\mathrm{RB}}$ resource blocks (RBs). In proposed scheme, feed back channel quality information (CQI) for best $M_{\mathrm{FB}}$ RBs, instead all to through relay, which fulfills requirement overhead. Considering highly versatile Nakagami- $m$ fading, derive closed-form expressions exact sum rate ideal CQI quantized feedback. also asymptotic expression have some findings understand impact parameters rate. First, more scattering fading environment lower decreases small , but increases large . Second, as ${M_{\mathrm{FB}}}$ approaches ${M_{\mathrm{RB}}}$ Third, gap between when or increases. Fourth, demonstrate achieves almost same full number destinations.