Spectrum sensing method and spectrum sensing device

A spectrum sampling device, comprising:

• a sampling unit configured to sample a received signal;
• a first operation unit configured to calculate an operation value relating to a strength of an input signal;
• a frequency searching unit configured to search for a frequency band having the largest correlation with the input signal;
• a second operation unit configured to generate a residual component signal by removing a signal component in a specific frequency band from the input signal;
• and
• a determination unit configured to determine whether the occupied frequency band is present,
• wherein the first operation unit receives the signal sampled by the sampling unit and the residual component signal generated from the second operation unit, respectively, as the input signal to calculate a first operation value and a second operation value which are operation values for each signal,
• the frequency searching unit receives the signal sampled by the sampling unit or the residual component signal generated from the second operation unit as the input signal to search for the frequency band having the largest correlation for the received signal, and
• the determination unit determines whether the frequency band occupied in the received signal is present based on a relative value of the first operation value and the second operation value.

A compressive spectrum sensing method, comprising:

• detecting a first signal component derived from an input signal and a second signal component obtained by removing the strongest signal component in a frequency band in the first signal component from the first signal component;
• calculating a first operation value and a second operation value relating to sizes of each of the first signal component and the second signal component;
• and
• determining whether the frequency band occupied in the input signal is present based on a relative value of the first operation value and the second operation value.