Method and device for identifying at least one communication channel with an incident signal

1. Method for identifying within an incident signal at least one frequency communication channel, said incident signal being received on a wireless apparatus, comprising determining a power spectral density (PSD) of that incident signal and identifying said at least one channel from said PSD,

wherein said step of identifying comprises performing a frequency derivative of said PSD and a recursive down-step and up-step detection of said derivative PSD to detect each channel corresponding to an up-step followed by a down-step, and

wherein said PSD determination comprises storing temporal samples of said incident signal received during a predetermined duration and performing a first Discrete Fourier Transform (DFT) processing on said stored samples.

2. Device for identifying within an incident signal at least one frequency communication channel, comprising reception means for receiving samples of the received signal, and processing means including:

means for determining a power spectral density (PSD) of that incident signal,

identification means for identifying said at least one channel from said PSD,

wherein the processing means further comprises:

storing means for storing temporal samples of said incident signal received during a predetermined duration,

a DFT module for a first Discrete Fourier Transform (DFT) processing, spectrum analyzing means including:

derivative means for determining the derivative frequency of said PSD, and

recursive up-step and down-step detection means for detecting each channel corresponding to an up-step followed by a down-step.

3. Wireless apparatus comprising a device according to claim 2 .