Apparatus and method for frequency-selective occupancy detection

Method for frequency-selective occupancy detection of a channel in a frequency band, comprising:

• detecting a power spectrum density in the frequency band;
• providing node frequencies for a threshold curve with respect to a noise floor in the frequency band;
• determining node power levels at the node frequencies based on receive power levels of the power spectrum density, wherein the determining node power levels comprises integrating a previously determined node power level into the determination of a node power level currently to be determined such that heavily varying node power levels are attenuated;
• determining the threshold curve in the frequency band based on the provided node frequencies and on the node power levels at the node frequencies;
• and
• comparing a current power of receive power levels in the channel with a reference power in the channel predetermined by the threshold curve, in order to detect an occupancy or non-occupancy of the channel based on the comparison.

A non-transitory computer-readable medium comprising a program code for causing a computer to perform a method for frequency-selective occupancy detection of a channel in a frequency band, the method comprising:

• detecting a power spectrum density in the frequency band;
• providing node frequencies for a threshold curve with respect to a noise floor in the frequency band;
• determining node power levels at the node frequencies based on receive power levels of the power spectrum density, wherein the determining node power levels comprises integrating a previously determined node power level into the determination of a node power level currently to be determined such that heavily varying node power levels are attenuated;
• determining the threshold curve in the frequency band based on the provided node frequencies and on the node power levels at the node frequencies, and
• comparing a current power of receive power levels in the channel with a reference power in the channel predetermined by the threshold curve, in order to detect an occupancy or non-occupancy of the channel based on the comparison.