Efficient PAPR Reduction for Discrete Multi-Tone Signalling in High-Speed Wireline Applications

This paper proposes a simple Peak-to-Average-Power-Ratio (PAPR) mitigation technique for Discrete Multi-Tone (DMT) systems in high-speed wireline applications. The method dynamically adjusts the DC level of each frame to reduce the signal's PAPR when observed over multiple frames. A detailed system-level analysis with post-layout results shows an expected PAPR reduction of 2.3dB, an SNR improvement of 2.0dB, and a 15% increase in data rate, while introducing a negligible 1% increase in transceiver power, silicon area, and link latency. As a result, this paper proposes a practical method to reduce the PAPR while introducing no negative ramifications.