Punchenco N. Methods and means to enhance the evaluation of characteristics of pulse code modulators broadband signals

The thesis is devoted to developing methods for improving the efficiency evaluation of characteristics of pulse-code modulator (PCM) signals in broadband radiodevices and means of telecommunications. A new method of evaluating the characteristics of broadband signals convert PCM, which in contrast to known statistical treatment involves using a test signal sequence of triangular pulses with random duration, which provides conditions for performance evaluation process HP PCM and the adequacy of the results real operating conditions modulators. It is shown that in comparison with Histogram method based on sinusoidal signal proposed method is characterized by productivity gains in the 8 ? 15 times, depending on the bit PCM investigated. Adequacy assessment CP PCM due to the possibility of modeling different dynamic regimes and the same reliability for all of its discrete values. A new spectral method for evaluating dynamic characteristics of PCM broadband signals, which, unlike existing methodology based on digital processing of pseudo-random signals using mutual spectral changes in bases of discrete Walsh functions and Fourier series, which ultimately improves the performance and adequacy assessment DH PCM. The analysis of the performance of the proposed spectral method, which confirmed that its coefficient of performance is 5 ? 75 depending on the sample size compared with a spectral method based on FFT.