On the use of pre-distortion equalization in infrared wireless communication links

This paper examines the potential merits of pre-distortion equalization as a novel measure to mitigate the distortion imposed by multipath dispersion in optical wireless communication links. It is demonstrated that the technique is able to reduce the required transmission power though, owing to a necessary signal content in the emitted zero-slot, this reduction is only possible when multipath dispersion has a significant influence. To attain the required transmission power, the authors propose a method that is based on a sensitivity assessment of the signal reception. Analytical details of this approach are provided demonstrating its ability to account for the received pulse shape which, in an optical wireless environment, is often irregular.