Equalization for Fiber-Optic Transmission Systems: Low-Complexity Iterative Implementations

Inhalt:
We consider a fiber-optic transmission system where linear distortions due to chromatic dispersion are dominant. For a direct detection receiver and linear modulation we derive a block transmission model, representing the digital transmission on a standard single-mode fiber. Electronic dispersion compensation on the receiver side is considered. The symbol error rate performance of linear equalization based on the zero-forcing criterion (ZF-LE) for varying length of the fiber is discussed. The Jacobi, Gauss-Seidel, and successive overrelaxationmethod are given as examples of low-complexity iterative implementations of the ZF-LE. Performance trade-offs between the direct method and the iterative implementations of a ZF-LE are enlightened.