Figure 2From: DF-based sum-rate optimization for multicarrier multiple access relay channelSum-rate comparison. Numerical values are K=128, \(\sigma ^{2}_{\text {ar}}=20\) dB, \(\sigma ^{2}_{\text {br}}= 20\) dB, \(\sigma ^{2}_{\text {rd}}=20\) dB, and \(\sigma ^{2}_{\text {ad}}=\sigma ^{2}_{\text {bd}}=20\) dB.Back to article page