Channels with and without memory are compared using the simplest Gaussian noise distribution model. It is shown that both channels have similar dependences of the capacity on the average signal power. At the same time, the optimal input alphabet for the channel with memory changes. The applicability of the model with nonlinear memory to the QPSK communication line with a periodic dispersion compensation is demonstrated numerically.
|Number of pages||8|
|Journal||Optoelectronics, Instrumentation and Data Processing|
|Publication status||Published - 1 Jul 2018|
- channel with memory
- nonlinear noise
- optical fiber communication lines
- Shannon limit