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Energy-Efficient High-Capacity Optical CDMA Networks by Low-Weight Large Code-Set MPC

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3 Author(s)
Jin Qian ; Dept. of Electron., Electr. & Comput. Eng., Univ. of Birmingham, Birmingham, UK ; Karbassian, M.M. ; Ghafouri-Shiraz, H.

In this paper, we have proposed a novel spreading code-set based on the prime code families, hereby referred to as transposed sparse-padded modified prime code for synchronous optical code-division multiple-access (OCDMA) networks. The proposed code-set is compared with modified prime codes (MPCs) in terms of correlation properties, bit-error rate (BER), and cardinality. This new low-weight large code-set has better correlation characteristics as compared with MPC families and, as results indicated, the new code-set has considerably improved the BER and power consumption of the OCDMA networks. We have analyzed the performance of the proposed code-set in both incoherent ON-OFF keying and pulse position modulation OCDMA systems, while the multiple access interference was the major degrading quality. The results indicate that at the BER floor of 10-9, the proposed code-set can accommodate greater number of users and consume less power as compared with the MPC under the same transmission conditions.

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Lightwave Technology, Journal of  (Volume:30 ,  Issue: 17 )