IMPROVE THE SIGNAL TO NOISE RATIO USING AND SUBTRACTIONTECHNIQUE IN OPTICAL CDMA

摘要

AND subtraction technique is proposed and presented inrnthis paper. The theory is being elaborated and thernsimulation results have been done by comparing ANDrnsubtraction technique against Complementary subtractionrntechnique by using DW code. The result shows that thernOSNR for AND subtraction technique give 39.5 dB at 10rnkm, while Complementary technique is only 24.5 dB. Inrnthis paper we have proved that AND subtractionrntechnique gives better optical signal to noise ratiorn(OSNR) performance due to reduce the multiple accessrninterference (MAI) compared to the Complementaryrnsubtraction technique.