Digitalization

2021 ◽  
pp. 199-210
Author(s):  
Laszlo Solymar
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Digital Signal ◽  
Pulse Code Modulation ◽  
Dominant Form ◽  
Amount Of Information ◽  
Digital Electronics ◽  
Code Modulation

Digital electronics (based on signals in the form of pulses) turned out to be superior to analogue electronics which produced the exact waveforms. The emergence of digital techniques reduced noise and at the same time was less demanding of bandwidth. Pulse code modulation was introduced and became the dominant form of modulation. The operation of digital exchanges is explained. Their growth is plotted as a function of time for the decade 1987–97. Digital signal processing is discussed. Shannon’s theory predicting that a certain amount of information can be transmitted entirely free of noise is discussed.

Method of estimation of hidden correlation of narrowband noise signals

2019 ◽  
pp. 34-39 ◽  
Author(s):  
E.I. Chernov ◽  
N.E. Sobolev ◽  
A.A. Bondarchuk ◽  
L.E. Aristarhova
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
New Technology ◽  
Digital Signal ◽  
Measuring Instruments ◽  
Central Frequency ◽  
Pearson Criterion ◽  
Useful Signal ◽  
Band Limited ◽  
Narrowband Noise

The concept of hidden correlation of noise signals is introduced. The existence of a hidden correlation between narrowband noise signals isolated simultaneously from broadband band-limited noise is theoretically proved. A method for estimating the latent correlation of narrowband noise signals has been developed and experimentally investigated. As a result of the experiment, where a time frag ent of band-limited noise, the basis of which is shot noise, is used as the studied signal, it is established: when applying the Pearson criterion, there is practically no correlation between the signal at the Central frequency and the sum of signals at mirror frequencies; when applying the proposed method for the analysis of the same signals, a strong hidden correlation is found. The proposed method is useful for researchers, engineers and metrologists engaged in digital signal processing, as well as developers of measuring instruments using a new technology for isolating a useful signal from noise – the method of mirror noise images.

Sign in / Sign up

Export Citation Format

Share Document