Rate Adaptation
- The rate of PAS is $k_\text{c}/n_\text{c}=H(A)$.
- The power of PAS is $\text{E}[(\Delta X)^2]=\text{E}[(\Delta A)^2]$.
→ We can control rate and power via $P_A$ and $\Delta$! This is the RateX Transceiver, see next slide for a demo!
G. Böcherer, F. Steiner, and P. Schulte, Bandwidth Efficient and Rate-Matched Low-Density Parity-Check Coded Modulation, IEEE Trans. Commun., vol. 63, no. 12, pp. 4651–4665, Dec. 2015.
F. Buchali, F. Steiner, G. Böcherer, L. Schmalen, P. Schulte, and W. Idler, Rate adaptation and reach increase by probabilistically shaped 64-QAM: An experimental demonstration, J. Lightw. Technol., vol. 34, no. 7, Apr. 2016.