access icon free Probability bounds of cross-layer interference in femtocell-underlay cellular networks employing interference alignment

In a conventional cellular network underlaid with femtocells, the authors employ interference alignment (IA) to restrict cross-layer co-channel interference (X-interference). In their scenario, locally obtained channel state information is allowed to be conveyed between heterogeneous nodes to construct a decentralised IA-based scheme. Furthermore, they provide closed-form formulas for the upper bounds of X-interference in both uplink and downlink directions and characterise how they asymptotically approach zero for big enough channel dimensions used by individual nodes. Simulation results demonstrate that X-interference is always bounded by the above-mentioned limits and prove accuracy of their analytical formulas.

Inspec keywords: femtocellular radio; radiofrequency interference; wireless channels; interference suppression; probability

Other keywords: channel state information; interference alignment; cross-layer cochannel interference; femtocell-underlay cellular networks; X-interference; heterogeneous nodes; cross-layer interference; decentralised IA-based scheme; probability bounds; closed-form formulas

Subjects: Electromagnetic compatibility and interference; Other topics in statistics; Mobile radio systems

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