| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: method for automatic detection of narrow-band signals involves receiving an analogue signal z(t), digitising said signal, for which discretisation, quantisation and coding operations are performed successively; the digitised signal zis pre-divided into N equal fragments, over which Fourier transform {F1, F2, ?, FN} is independently performed; parameters Sof the spectral representation are calculated via successive multiplication of spectral representations {Fl, F2, ?, FN}, which correspond to N fragments of the digitised signal z, and then compared with a threshold value, and based on the comparison results, a decision on signal detection is made, wherein the threshold value R is calculated by calculating the tripled value of the average value of parameters of the spectral representation S, and the decision on signal detection is made based on the results of comparing the threshold value R with the calculated parameters Sof the spectrum representation F, for which the condition R<Sis satisfied.EFFECT: high reliability of making a decision on the presence of a useful signal in a received realisation.4 dwg |
