Patent ID: 8768175
Filing Date: 2014-07-01
Classification: H04B,H04J,H04L

Abstract:
1. A method to perform four-dimensional optical multiband OFDM communication, comprising: organizing an N-dimensional (ND) signal constellation points as a signal matrix; performing 2D-inverse FFT and 2D-FFT to perform modulation and demodulation, respectively; applying both orthogonal polarizations in the OFDM communication to deal with chromatic dispersion, PMD and PDL effects, and multidimensional signal constellation to improve optical signal-to-noise ratio (OSNR) sensitivity; and comprising performing a 4D mapping and writing outputs of 4D mapping column-wise into a 4×M symbol-like interleaver and providing to a two-dimensional inverse discrete Fourier transform (2D-IDFT) with to generate where s ij =(s ijJ s ijO ), with subscripts I and Q corresponding to in-phase and quadrature channels, respectively.