Analysis of THz Communications in the Finite Blocklength Regime

The theory of finite blocklength coding provides powerful tools to approximate the maximum achievable rate for short blocklength coding. In this work, the normal approximation is applied for the transmission over the THz channel assuming a point-to-point single-carrier system. Here, a transmission with bit interleaved coded modulation (BICM) is assumed and compared to coded modulation (CM). The performance is analysed for higher order modulations considering PSK and QAM. These results are verified by simulations, considering terminated convolutional codes with different coding rates, minimum mean-squared error linear equalization (MMSE-LE) and soft decision decoding. Our simulation results show that a rate of about 100 Gbps is achievable for 32QAM with a blocklength of 100 and a bit error rate of 10
^-3
.