A photon-counting-based iterative parallel interference cancellation (PIC) scheme for free-space opticalcommunications in the presence of multiple-access interference, shot noise, background radiation, and turbulence fading is designed. An efficient chip-level iterative equivalent noise estimation algorithm is also derived. Simulation results show that the proposed scheme can achieve a single-user performance,bound with the fast convergence property. More importantly, it can eliminate the bit-error rate floor of the conventional optical code-division multiple-access system with the aid of a relatively short spreading code length.
© 2012 Chinese Optics Letters
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(060.2605) Fiber optics and optical communications : Free-space optical communication
(200.2605) Optics in computing : Free-space optical communication
Fiber Optics and Optical Communications
Xiaolin Zhou, Yandong Yang, Yufeng Shao, and Jun Liu, "Photon-counting chip-interleaved iterative PIC detector over atmospheric turbulence channels," Chin. Opt. Lett. 10, 110603-110603 (2012)