The achievable generalized degrees of freedom of interference channel with orthogonal relay

The generalized degrees of freedom (GDOF) of the interference channel with orthogonal relay (ICOR) was studied in this paper. ICOR is a modified ICR model where each of the forward and backward relay channels is orthogonal with the rest channels. In this paper, the achievable GDOF of ICOR was obtained and the power allocation scheme at the source that can maximize the GDOF was given. The relation between the GDOF of the whole system and the parts of the ICOR was also analyzed, where the later are namely the interference channel (IC) part and the orthogonal relay channel (ORC) part. The results showed that the GDOF of the IC part and the ORC part are balanced by the power allocation scheme and the optimum power allocation is affected by the channel parameters of the source-to-destination channel and the interference channel.