FEATURES OF QUASICOGERENT SIGNAL PROCESSING IN FREQUENCY MANIPULATION TELECOMMUNICATIONS
Journal Title: Телекомунікаційні та інформаційні технології - Year 2018, Vol 141, Issue 1
Abstract
The paper represents the principles of analytical description the formation of signals frequency manipulation in telecommunication systems. The peculiarities of quasi-coherent processing of signals of frequency manipulation on the basis of digital frequency downstream transformation with subsequent filtration and multiple decimation are described. The analysis of the influence of finite-dimensional calculations on the quality of signal processing is carried out, which can be further used to select the internal computational discharges of digital downconversions while preserving the given quality of signal processing and hardware costs for its realization. The conditions of realization of the model of the frequency converter with the decrease of the sampling rate on the basis of cascade filters are investigated. The requirements for the selection of signal decimation parameters when eating in the noise conditions are experimentally investigated. The conditions for implementation of the model of the frequency converter with lower frequency sampling based on cascaded filters CIC (Cascaded integrator-comb) filters and formation of characteristics of cascade on the basis of programmable filters (PFIR) are investigated. The results of the study allow to establish the following: the presence of noise in the channel of the digital quadrature heterodyne with a level from zero to half the amplitude of the useful signal can increase the decimation factor of the corrective FIR filter one and a half times. It has been experimentally established that the reduction of the decimation factor of the corrective FIR filter can increase the noise level in the quadrature generator channel, while the amplitude of the useful component at the DDC output decreases and distortion increases.
Authors and Affiliations
Juliy Boiko, Ilya Pyatin
Keywords
Related Articles
- EP ID EP458875
- DOI -
- Views 83
- Downloads 0
A multicast routing model supporting shared explicit reservation of link resource.
A mathematical model for multicast routing supporting shared explicit reservation of link resource was presented, which is introduced by linear expressions that responsible for ensuring the connectivity of the calculated...
ESTIMATION OF THE EFFICIENCY OF THE INTELLECTUAL SYSTEM FUNCTIONING
The article is devoted to the substantiation of the approach to the evaluation of the effectiveness of the functioning of the intellectual system (IntS), which is a component of the information system. The purpose of the...
Methods of future network support resistance to external destabilizing factor
The article is defined that improving the quality of the future network is possible by increasing the stability of network elements. The method of ensuring the stability of the future network elements such as communicati...
Diagnostics of complex technical systems in conditions of irregular destructive influences.
Last several years we can see the intensive development of complex systems. Such development generates a lot of publications, giving a theoretical basis for building expert systems. These expert systems find the connecti...
METHOD OF RAISING ACCURACY GUIDING THE ANTENNA DEVICE OF THE RADIOENGINEERING CONTROL COMPLEX OF THE SPACECRAFT
In order to determine the requirements for the accuracy of antenna guidance and the probability of errors in receiving microwave and VHF radio signals, the analysis of the influence of nonlinear characteristics of the ra...