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Updated: Jun 13, 2026

Design and Analysis for Fall Detection System Simplification

Design and Analysis for Fall Detection System Simplification

Published on: April 6, 2020

Security-Aware Codebook Design for Low-PAPR AFDM Systems.

Tingting Zhang¹, Haibo Dai²

¹School of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.

Sensors (Basel, Switzerland)

|June 12, 2026

Summary

This summary is machine-generated.

This study introduces a novel security-aware codebook for Affine Frequency Division Multiplexing (AFDM) systems. The design enhances security against eavesdroppers while maintaining low PAPR and reliable communication.

Keywords:

affine frequency-division multiplexing blind side-information detection codebook design peak-to-average power ratio physical-layer security

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Last Updated: Jun 13, 2026

Design and Analysis for Fall Detection System Simplification

Design and Analysis for Fall Detection System Simplification

Published on: April 6, 2020

Area of Science:

Wireless Communications
Signal Processing
Information Security

Background:

Affine Frequency Division Multiplexing (AFDM) is a promising waveform for high-mobility wireless systems.
Existing AFDM systems face security vulnerabilities due to public codebooks, increasing eavesdropping risks.
High Peak-to-Average Power Ratio (PAPR) is a significant challenge in AFDM communications.

Purpose of the Study:

To propose a novel security-aware codebook design for low-PAPR AFDM systems.
To address the dual challenges of eavesdropping vulnerability and high PAPR in AFDM.
To enhance the security of AFDM communications without compromising legitimate user performance.

Main Methods:

Developed a security-aware codebook design minimizing an eavesdropper-oriented cross-alignment metric.
Ensured the design maintains legitimate user decoding reliability and low PAPR.
Employed a dedicated alternating discrete coordinate descent algorithm to solve the non-convex design problem.

Main Results:

The proposed codebook design significantly degrades eavesdropper decoding performance.
Legitimate receiver decoding reliability is maintained.
The system successfully maintains a low PAPR characteristic.

Conclusions:

The security-aware codebook design effectively enhances AFDM system security against eavesdropping.
The proposed method offers a practical solution for secure and efficient AFDM communications in high-mobility scenarios.
This approach balances security, reliability, and power efficiency in wireless systems.