"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 2, 2019

contents of issue      DOI  10.30898/1684-1719.2019.2.9     full text in Russian (pdf)  

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.

References

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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