DEVICE FOR THE ANALYSIS OF THE INSTANTANEOUS SPECTRUM OF A VOICE SIGNAL IN HARMONIC DECODERS
V. I. Kulya · Defense Technical Information Center (DTIC) · 1965
The proposed device is distinguished from the known ones by the fact that in it there is used an LC-line of delay which is open at the end and matched in the beginning, is of the low-frequency type, has branches, and is connected with a conversion system. The latter consists of linear detectors and summators arranged ahead of and behind the linear detectors in each branch of the delay line and terminated in low-frequency filters. This difference supposedly assures the obtaining of voltages proportional to the coefficients of the breaking down of the instantaneous spectrum into Fourier's cosine series.