Improving the Classification of MPSK and MQAM Modulations by using Optimized Nonlinear Preprocess in Flat Fading Channels

Kadoun, I.; Khaleghi, H.

doi:10.22061/jecei.2022.8743.550

Document Type : Original Research Paper

Authors

Electrical and Computer Engineering Department, Malek Ashtar University of Technology, Tehran, Iran.

https://doi.org/10.22061/jecei.2022.8743.550

Abstract

Background and Objectives: Intelligent receivers, automatically detect the digital modulation type of the received signals for demodulation purposes where is well known as Automatic Modulation Classification (AMC) module. The performance of AMC algorithms depends on the channel conditions where for example, in fading channel its performance gets worse than the AWGN channel.
Methods: We propose a new algorithm for improving the AMC classification accuracy in flat fading channels. The proposed algorithm consists of an optimizable nonlinear preprocess followed by Linear Discriminant Analysis (LDA) technique. Two Lemmas have been found for extracting the optimization rule. And an optimization algorithm has been built based on the previous Lemmas.
Results: The simulation results show that the proposed algorithm improves the classification accuracy between 8-Phase Shift Keying (8PSK) and 16PSK (as an example of M-array PSK (MPSK) inter-class) for Signal-to-noise ratio (SNR) values greater than 13 dB, and between 16- quadrature amplitude shift modulation (16QAM) and 64QAM (as an example of M-array QAM (MQAM) inter-class) for SNR values greater than 4 dB.
Conclusion: By using the proposed optimization algorithm, the AMC classification accuracy has been improved. Other classification problems can use this algorithm. And other nonlinear preprocess functions or optimization algorithms may be found in future work.

Keywords

Main Subjects

Classification

Open Access

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Journal of Electrical and Computer Engineering Innovations (JECEI)

Improving the Classification of MPSK and MQAM Modulations by using Optimized Nonlinear Preprocess in Flat Fading Channels

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Volume 11, Issue 1
January 2023
Pages 141-152

Improving the Classification of MPSK and MQAM Modulations by using Optimized Nonlinear Preprocess in Flat Fading Channels

References

References

Send comment about this article

Volume 11, Issue 1January 2023Pages 141-152

Volume 11, Issue 1
January 2023
Pages 141-152