Spectral Efficiency Improvement based on Small-cell Deployments Toward 5G Communications Technologies

Efficient‐spectrum management based on localisation of primary user position towards 5G

“…To achieve this, the spectrum‐sensing mechanism is the important and basic step where the SU identifies the idle bands of the licensed (primary) users for future reuse. To fulfil the proper spectrum utilisation, these SUs must be able to effectively distinguish (identify) the signal generated from the PU from other SU signals to avoid harmful interference to the SUs or to avoid being the cause of interference to the PU which can further affect its inherent quality of service (QoS) [13, 14]. In other words, in case the SU is utilising the idle band while detecting the presence of the PU, it must abstain from using the band, then look for one which is idle for utilisation in order to ensure the protection of the PU against any type of attacks (including SU attacks).…”