Macro- and femtocell interference mitigation in OFDMA wireless systems

Gang Ning, Qinghai Yang, Kyung Sup Kwak, Lajos Hanzo
2012 2012 IEEE Global Communications Conference (GLOBECOM)  
We conceive an interference mitigation scheme, for twin-layer networks for protecting the macrocell-users, from the interference imposed by the femtocells as well as for mitigating the interference amongst femtocells. Femtocells are capable of finding the available sub-bands using cognitive radio techniques, where the lowest interference is observed by the nearby macrocell-users. A sub-channel allocation algorithm is developed with the aid of graph-theoretic approaches for optimizing the
more » ... ll throughput in dense femtocells deployment scenarios. The femto-users are grouped into different clusters for suppressing the interference amongst them. Each cluster is assigned a unique sub-channel by using the classic cluster-coloring approach. Adaptive power allocation is performed among the femtocells for further enhancing the system throughput and the attainable performance is quantified.
doi:10.1109/glocom.2012.6503924 dblp:conf/globecom/NingYKH12 fatcat:3ksejoiya5f6lgvpkv2uteo4je