Fundamental Experiments on Modulation Schemes and Forward Error Correction in Terahertz Communication

Fundamental Experiments on Modulation Schemes and Forward Error Correction in Terahertz Communication

연구 분야: Networking

학회: 2024 27th International Symposium on Wireless Personal Multimedia Communications (WPMC)

In this paper, we evaluate the BER characteristics of the linear modulation schemes BPSK, QPSK, and 16QAM, which are relatively easy to implement and resistant to noise and interference in THz communications system with limited transmission power. Additionally, we investigate the improvement in BER by introducing convolutional codes (CC) as forward error correction (FEC). Through simulations and experiments, we assess the BER of each modulation scheme and analyze in detail how much the BER can be improved with the use of CC. The experimental results in THz communications demonstrate that the transmission distance for achieving a BER of 10^{-2} extends by 1.5, 1.2, and 0.4 meters for BPSK, QPSK, and 16QAM, respectively, when CC is applied, with the input power of -1 dBm. These results provide fundamental data that are expected to contribute to the selection of optimal modulation schemes and error correction methods in future THz communication systems.