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Modulation Order Reduction Method for Improving the Performance of AMC Algorithm Based on Sixth – Order Cumulants
Modulation Order Reduction Method for Improving the Performance of AMC Algorithm Based on Sixth – Order Cumulants
Autori:
Časopis: IEEE Access
Volume, no: 8 , 1
ISSN: 2169-3536
DOI: 10.1109/ACCESS.2020.3000358
Stranice: 106386-106394
Link: https://ieeexplore.ieee.org/document/9109565?source=authoralert
Apstrakt:
For the last two decades a large number of different automatic modulation classification (AMC) algorithms were developed, and many improvements in classification performance are reported. This was commonly achieved by engaging complex structures of neural networks, or other adaptable mechanisms for achieving better precision, when it comes to decision-making. Still, from practical implementation point of view, low algorithm complexity, economical usage of resources and fast execution remain to represent very desirable properties of an AMC algorithm. These properties are recognized in AMC algorithms based on higher - order cumulants as classification features, so their further improvement is of interest. Previous performance analysis of an algorithm based on sixth - order cumulants, in scenarios with complex valued signals' classification, showed that improvements are possible in the context of resources engaged and speed of execution. In this paper a novel approach is presented, for improving the correctness of classification process with sixth-order cumulants and simple two-step feature extraction structure, by engaging a new method for reduction of observed signal's modulation order which directly improves the classification performance. While tested with sixth-order cumulants, proposed method preserves good statistical properties of signal's higher - order cumulants in general, so it can be adopted in other AMC algorithms as well. Proposed modulation order reduction method is described in details, tested through computer simulations within the sixth-order cumulant AMC algorithm, and achieved improvements in performance are presented and explained.
Ključne reči: Mathematical model , Phase shift keying , Signal to noise ratio , Quadrature amplitude modulation , Complexity theory , Feature extraction
Kategorije objave:
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