Improving Reception Quality in Terahertz OFDM Communications Through Equalization That Accounts for Phase Noise (OECC2026)

In terahertz-band OFDM communications, signal distortion caused by phase noise limits transmission performance. In this study, we proposed an equalization method that takes the effects of phase noise into account by utilizing pilot signals, which are known auxiliary signals. This method addresses signal distortion and phase errors caused by the communication channel, thereby improving the accuracy of received signal reconstruction. This achievement represents an improvement in receiver-side signal processing toward the realization of high-capacity terahertz communications.

We presented these results at OECC 2026, held in Busan, South Korea.

1. Bowen Liu, Hitomi Uemura, and Takasumi Tanabe, "Improved pilot-assisted equalization in phase-noise-limited terahertz OFDM links," 31st OptoElectronics and Communications Conference (OECC 2026), Tu2D-5, Busan, June 28–July 2 (2026).