UDC 621.372.54
COMB ADAPTIVE FILTERING ALGORITHM
A. Yu. Linovich, Ph.D. (Tech.), associate professor, RSREU, Ryazan, Russia; orcid.org/0000-0002-5476-7069, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
V. S. Litvinova, Ph.D. (Tech.), associate professor, RSREU, Ryazan, Russia; orcid.org/0000-0002-0089-6260, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
M. D. Korolev, master student, RSREU, Ryazan, Russia; orcid.org/0000-0002-7742-6400, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The problem of multipath channel frequency response equalization in a receiver is considered. The aim is to develop an algorithm of comb adaptive filtering, which makes possible, on the one hand, to provide high rate of multirate receiver system adaptation, and on the other hand, to reduce computational complexities of real-time processing. The robustness analysis of the suggested algorithm is carried out. Two variants of comb adaptive filter are studied. For the second one a fast modification is proposed. On the assumption of multichannel communication system equalizer realization the developed algorithm is able to provide the advantage in rate almost by a factor of ten and at the same time to reduce computational complexities by a factor of three as compared with the least-mean-square algorithm as the experimental results demonstrate.
Key words: multirate adaptive system, comb filter, equalizer, decimation, interpolation, analysis subsystem.