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research-article

Cross-domain prototype similarity correction for few-shot radar modulation signal recognition

Authors:

Chen ShenAuthors Info & Claims

Volume 223, Issue C

https://doi.org/10.1016/j.sigpro.2024.109575

Published: 08 August 2024 Publication History

Abstract

The new classes of radar signals are increasingly difficult to acquire under non-cooperative environments, which makes it difficult to support convolutional neural network training with limited labeled samples. The few-shot learning (FSL) methods have shown great performance in classification with limited labeled samples, but the FSL methods ignore that the class distributions between the new and original tasks are significantly different, resulting in a massive challenge in identifying new radar signals. To solve this problem, a few-shot radar modulation signal recognition method based on cross-domain prototype similarity correction (CDPSC) is proposed. Specifically, a residual feature tokenizer transformer (RFTT) model embedded with a pooling token generation block is designed to focus on the important features and improve the ability to represent samples. Meanwhile, the proposed domain prototype similarity mapping (DPSM) strategy adaptively learns the class mapping, reduces the inter-domain difference through feature distribution alignment, and effectively corrects the target domain prototypes. In addition, we introduce a sample prototype embedding (SPE) strategy in the training phase, which can reduce the intra-class distance and increase the inter-class distance. Experimental results demonstrate that the CDPSC method is superior to typical FSL methods in recognition accuracy under different sample numbers.

Highlights

•

A CDPSC method is proposed for few-shot radar modulation signal recognition.

•

A domain prototype similarity mapping strategy improves the accuracy of prototypes.

•

The method improves feature extraction ability by extracting time-series features.

•

The proposed method has excellent recognition performance.

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Information & Contributors

Information

Published In

cover image Signal Processing

Signal Processing Volume 223, Issue C

Oct 2024

298 pages

Issue’s Table of Contents

Elsevier B.V.

Publisher

Elsevier North-Holland, Inc.

United States

Publication History

Published: 08 August 2024

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