IMPROVING THE EFFICIENCY OF DATA TRANSMISSION SYSTEMS BY SIGNAL BASIS ORTHOGONALIZATION
Authors:
1.
Sevastopol State University
(Institute of Radio Electronics and Information Security, Associate professor)
Sevastopol, Sevastopol, Russian Federation
Sevastopol, Sevastopol, Russian Federation
2.
Institute of Radio Electronics and Information Security, Sevastopol State University
3.
Institute of Radio Electronics and Information Security, Sevastopol State University
Type:
Article
Pages:
from 62
to 77
Status:
Published
Received:
20.03.2018
Accepted:
25.03.2018
Published:
25.03.2018
Subject area:
UDK 62 Инженерное дело. Техника в целом
Language:
Russian
Keywords:
quasi-orthogonal functions, orthogonal weight, normalized filter, low pass filter, band pass filter, impulse characteristic, Nyquist limit, inter-symbol interference, noise immunity
Abstract (English):
It is shown that from the equidistant biased impulse response of normalized filters one can create a quasi-orthogonal weight basis. It is concluded that when certain requirements are carried out the conversion of a normalized filter into a low-pass filter with a predetermined cutoff frequency or into a bandpass filter with a center frequency and a bandwidth given does not alter the orthogonality conditions. It is suggested to use the signals received by the specified basis for data transmission. The dependence of the maximum speed of data transmission in the proposed system on the filter order forming a communication channel, the minimum attenuation of its impulse characteristics and its bandwidth at 3 dB, is obtained. Two options for construction of such signals receiver are indicated. It is shown that in the conditions of inter-symbol interference the proposed method of systems constructing offers better noise immunity in comparison with the classical approach.
It is shown that from the equidistant biased impulse response of normalized filters one can create a quasi-orthogonal weight basis. It is concluded that when certain requirements are carried out the conversion of a normalized filter into a low-pass filter with a predetermined cutoff frequency or into a bandpass filter with a center frequency and a bandwidth given does not alter the orthogonality conditions. It is suggested to use the signals received by the specified basis for data transmission. The dependence of the maximum speed of data transmission in the proposed system on the filter order forming a communication channel, the minimum attenuation of its impulse characteristics and its bandwidth at 3 dB, is obtained. Two options for construction of such signals receiver are indicated. It is shown that in the conditions of inter-symbol interference the proposed method of systems constructing offers better noise immunity in comparison with the classical approach.
Keywords:
quasi-orthogonal functions, orthogonal weight, normalized filter, low pass filter, band pass filter, impulse characteristic, Nyquist limit, inter-symbol interference, noise immunity
quasi-orthogonal functions, orthogonal weight, normalized filter, low pass filter, band pass filter, impulse characteristic, Nyquist limit, inter-symbol interference, noise immunity
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2. Lem G. Analogovye i cifrovye fil'try: raschet i realizaciya. M.: Mir, 1982. 592 s.
