An algorithm for processing of wideband signals
propagating in mediums with frequency dispersion
A. A. Kalshchikov, V. V. Shtykov
National research university «MPEI»,
Krasnokazarmennaya 14, Moscow, 11250, Russia
The
paper is received on February 11, 2019
Abstract. The
increase in noise immunity and efficiency of radio systems is central to the
modern theory and technology of information transfer. As the information
transfer speed accelerates, the influence of the dispersion characteristics of
the communication channel increases, which is manifested in the distortion of
the transmitted signal. Therefore, the development of alternative methods for
processing broadband signals with significant frequency dispersion in the
signal propagation channel is of practical interest.
An algorithm of processing broadband signals
propagating in media with frequency dispersion is presented. A calculation
speed improvement technique based on a recursive scheme is described. A
numerical simulation for shear electromagnetic waves in plasma using signals
with chirp modulation is performed. A hardware implementation of the proposed
algorithm is reviewed.
It is shown that it is impossible to
introduce the concept of group delay and apply classical matched filtering with
a probe pulse in media with significant frequency dispersion of phase velocity.
The use of the proposed algorithm of
calculating the functional allows to increase power characteristics of the
radio technical system due to digital signal processing. The algorithm can be
applied to any dispersion media, where the tangent of the dielectric loss angle
is much less than one.
The proposed algorithm can also be used in
information transfer systems, if its protocol provides for the synchronization
of the source and the receiver.
Key words: dispersion,
signal correction, plasma.
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For citation:
A. A.
Kalshchikov, V. V. Shtykov. An algorithm for processing of wideband signals
propagating in mediums with frequency dispersion. Zhurnal
Radioelektroniki - Journal of Radio Electronics.
2019. No. 2. Available at http://jre.cplire.ru/jre/feb19/9/text.pdf
DOI 10.30898/1684-1719.2019.2.9