Turbulence Resilient Free-Space Optical Communication Using Iterative Blind Equalization

초록

In the free-space optical communication, the orthogonal multiple data-carrying beams can increase the transmission rate, but there are inherent cross-talk and inter-symbol interference due to atmospheric turbulence. The conventional blind equalization can mitigate interference, but the equalizer output symbols still have residual interference in the case of strong turbulence. To improve the error performance, we consider an iterative blind equalization that finds the channel response and the demodulated symbols. Numerical results show that the iterative blind equalization significantly improves the bit error performance.

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