Patent ID: 8670506

Claim:
An apparatus, implemented in hardware, for providing a reduced representation in the frequency domain based on a time-domain RF signal, the apparatus comprising: a time-frequency converter adapted to transform the time-domain RF signal to acquire a frequency-domain representation based on the time-domain signal, wherein the time-frequency converter is adapted to weight the frequency-domain representation with a weighting function, wherein the weighting function comprises at least one frequency region centered around a center frequency and comprising a frequency width, wherein the weighting function comprises a higher, constant value inside the at least one frequency region compared to at least one value outside the frequency region; an entropy encoder adapted to acquire the reduced representation by entropy encoding a signal representing the frequency-domain representation or derived from the frequency-domain representation; and an eliminator adapted to remove at least one portion of the weighted frequency-domain representation, wherein a signal property of the portion of the weighted frequency-domain representation fulfills a predetermined condition, wherein the eliminator is adapted to determine as to whether the signal portion fulfills the predetermined condition based on a) a threshold value adaptively determined from a noise floor of a momentary reception spectrum or b) based on a frequency dependent threshold value course and flexibly adapting to a respective noise floor.