Quantized Digital Amplification Physical Layer Security Schemes

Security in wireless communication systems is paramount for safeguarding the privacy of users. Typically, security measures are implemented on higher layer and rely on encryption codes based on private and public keys. However, this often results in information overhead, compromising service bit rates and both spectral and energy efficiency. Alternatively, physical layer security schemes offer a viable solution. One advantage is their compatibility with higher-layer security protocols, ensuring security without sacrificing spectral or energy efficiency. A physical layer security scheme employing the Quantized Digital Amplification (QDA) technique offers both simplicity and high secrecy. This approach efficiently handles high Peak-to-Average Power Ratio (PAPR) signals, commonly utilized to achieve high spectral efficiencies. By combining low complexity with robust security, QDA ensures spectral efficiency while maintaining secrecy. Analyzing various scenarios demonstrates the effectiveness of implementing such a security scheme at the physical layer.