Multi-cell cooperation based on time reversal in heterogeneous wireless networks

Cooperation among heterogeneous base stations can improve spectrum efficiency through interference avoidance. This paper introduces a time reversal (TR) technique in multi-cell cooperation to mitigate interference and efficiently allocate spectrum resources. Exploiting its inherent power concentration feature, TR can effectively tackle the problem of edge effect. We present analysis and simulation results to demonstrate that proper use of TR significantly improves the spectrum efficiency of heterogeneous networks.