Abstract—This paper assesses the performance of a newly developed code in the spectral amplitude coding known as the Recursive Combinatorial (RC) code to suppress noise in the Optical Code Division Multiple Access (OCDMA) network. The code construction is shown and performance analysis is compared with other codes. Due to the low number of overlapping bits of the code’s property, the Multiple Access Interference (MAI) is successfully suppressed. The feasibility of this code to use direct detection technique at the receiver results in the suppression of Phase Induced Intensity Noise (PIIN). Results indicate that noise reduction using this code is better compared to other codes, with lower effective power needed for an acceptable Bit Error Rates (BER) of 10^-9. The shot noise is also shown to be lower using this code compared to other codes. 
 

Index Terms—recursive combinatorial, optical code division multiple access, phase induced intensity noise, direct detection, multiple access interference

Cite: Junita M. Nordin, Syed Alwee Aljunid, Rosemizi Abd Rahim, Anuar M. Safar, C. B. M. Rashidi, Abd Rahman Kram, and N. M. Nawawi, "Suppression of Noise Based on Recursive Combinatorial Code in Optical CDMA Direct Detection Architecture," International Journal of Signal Processing Systems, Vol. 4, No. 5, pp. 394-398, October 2016. doi: 10.18178/ijsps.4.5.394-398