Process and device for detection of a frequency sub-band in a frequency band and communications equipment comprising such a device

摘要

The invention relates to a process for detection of a signal in a frequency sub-band of a frequency band of an acquired signal y(t), the process comprising:
acquisition of the signal y(t) in a frequency band;frequential analysis of said acquired signal y(t) to obtain at least one frequential signal Y with NFFT frequential components;breakdown into M frequency sub-bands i of size N of the frequential signal Y, the size of each frequency sub-band being a function of the bandwidth of the signal to be detected;determination, in the frequential domain, for each frequency sub-band, of a criterion Ti, i=1, . . . , M as a function of the energy of the signal in the frequency sub-band i and of the coefficient two of the autocorrelation function of the signal in the frequency sub-band i;decision, as a function of the criterion Ti, to determine whether a signal is detected in the sub-band i.

主权项

1. A process for detection of a signal in a frequency sub-band of a frequency band of an acquired signal y(t), the process comprising:
acquisition (E1) of the signal y(t) in a frequency band; frequential analysis (E2) of said acquired signal y(t) to obtain at least one frequential signal Y with NFFT frequential components; breakdown (E3) into M frequency sub-bands i of size N of the frequential signal Y, the size of each frequency sub-band being a function of the bandwidth of the signal to be detected; determination (E4), in the frequential domain, for each frequency sub-band, of a criterion Ti, i=1, . . . , M as a function of the energy of the signal in the frequency sub-band i and of the coefficient two of the autocorrelation function of the signal in the frequency sub-band i; decision (E5), as a function of the criterion Ti, to determine whether a signal is detected in the sub-band i.