Spectrum Sensing with VSS-NLMS Process in Femto/Macro-cell Environments

Sidi Mohammed Hadj Irid (University of Tlemcen)
Mohammed Hicham Hachemi (University of Tlemcen)
Haroun Errachid Adardour (University of Tlemcen)
Mourad Hadjila (University of Tlemcen)

International Journal of Electrical and Computer Engineering
Vol 8, No 6: December 2018

Handover is a process that allows a mobile node to change its attachment point. A mobile node connected to a network can, in order to improve the quality of service, have the need to leave it to connect to a cell either of the same network or of a new network. The present paper introduce three techniques using adaptive Variable Step-Size Least Mean Square (VSSLMS) filter combined with spectrum sensing probability method to detect the triggering of handover in heterogeneous LTE networks. These techniques are Normalized LMS (NLMS), Kwong-NLMS and Li-NLMS. The simulation environment is composed of two femtocells belonging to a macrocell. Five User Equipements (UEs) are positioned in one femtocell and are assumed closest to its circumference. Simulation results show that sensing probability with Li-NLMS algorithm has a better performance compared with classical NLMS and Kwong-NLMS.