Receiver Characteristic Aware Optimal Resource Allocation in Multi-RAT Wireless Networks

To cope with increasing demand on wireless services, next-generation wireless systems are expected to use multiple radio access technologies, with different receive and transmit characteristics, operating over the same hand of spectrum in a spatial-temporal neighborhood. This will make the RF front-ends susceptible to unprecedented adjacent-channel interference (ACI), which can jeopardize communication performance. In this paper, we propose a novel ACI-aware joint channel and power allocation framework that takes into account the receiver imperfections arising due to (i) imperfect image frequency rejection, and (ii) analog-to-digital converter aliasing. The proposed resource allocation framework aims at minimizing the number of allocated channels and the aggregate power transmitted while satisfying the rate demands of different links in a multi-RAT environment. The results demonstrate the criticality of receiver-characteristic awareness when designing resource allocation schemes for different types of networks. Also, the trade-off between channel allocation and power assignment is explained.