Design and Realization of Optical Scattering Signal Receiving System

摘要

A novel signals' receiving and data processing approach is proposed for optical scattering signal transmitting. This proposed approach consist of three steps: firstly, the signals are received by two detectors in terms of spacial diversity synchronously, and then collected by high speed data collection card afterwards; Secondly, the 1.5 dimension spectrums of the collected signals in step 1 are calculated; Finally, the cross-correlation of the 1.5 dimension spectrums is used to decrease the non-gauss noise. In order to validate the proposed approach, an optical scattering signal receiving system has been designed based on two detectors and other ordinary instruments. The experimental results indicate that the designed system can demodulate the optical scattering signals accurately even if the noise-signal ratio (SNR) is as low as -25dB. It proves to be effective and adequate in the secure optical scattering communication.