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martinez-marrero2022adaptive

Liset Martínez Marrero, Jorge Torres Gómez, Falko Dressler and Maria Julia Fernández-Getino García, "Adaptive Blind MPSK Constellation Recovery and Equalization for Cognitive Radio Applications," IEEE Transactions on Vehicular Technology, vol. 71 (11), pp. 11988–12000, November 2022.

Abstract

Cognitive radio (CR) is considered a relevant communication paradigm to deal with the increasing demands in modern communications systems. Adaptive schemes are required to recognize channel conditions and to properly adjust main transmission parameters to improve the quality of communications. In this direction, blind algorithms to recover constellation, from phase-modulated signals, represent a means to implement cognitive capabilities to allow automatic modulation recognition (AMR) on receivers. Commonly, the most popular approaches for blind constellation recovery are based on a two-step scheme. The first step uses to equalize channel effects and reduce inter-symbol interference (ISI). The second step carries out constellation recovery utilizing phase locked loop (PLL) systems like the Costas Loop, then to classify the incoming signal. This work proposes a novel single-step blind adaptive filter solution, inspired by an adaptive interference canceler, for joint equalization and constellation symbol recovery from received phase shift keying (PSK) waveforms. Furthermore, we propose new coefficients update mechanisms based on the constant amplitude of PSK signals. The proposed solution exhibits reduced computational complexity compared to the state of the art and a reduced time of convergence. Additionally, the proposed scheme does not require a training sequence to operate properly. The obtained results clearly show that the proposed scheme significantly improves accuracy regarding phase symbol estimation and ISI reduction.

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Liset Martínez Marrero
Jorge Torres Gómez
Falko Dressler
Maria Julia Fernández-Getino García

BibTeX reference

@article{martinez-marrero2022adaptive,
    author = {Mart{\'{i}}nez Marrero, Liset and Torres G{\'{o}}mez, Jorge and Dressler, Falko and Fern{\'{a}}ndez-Getino Garc{\'{i}}a, Maria Julia},
    doi = {10.1109/TVT.2022.3194965},
    title = {{Adaptive Blind MPSK Constellation Recovery and Equalization for Cognitive Radio Applications}},
    pages = {11988--12000},
    journal = {IEEE Transactions on Vehicular Technology},
    issn = {1939-9359},
    publisher = {IEEE},
    month = {11},
    number = {11},
    volume = {71},
    year = {2022},
   }
   
   

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