Design of Non-Mapping Code in Spectral and Special Domain With Variable Weight and OFDM System 

Paper has been proposed the design of non-mapping code in spectral and spatial domain with variable weight coding system and new hybrid concept of OFDM–SAC OCDMA was also explored in spectral and spatial domain. The one dimensional non mapping coding system has been extended in spectral as well as in spatial domain. Extension of code in two dimensional domains enlarges the performance, in comparison to the existing systems. The performance of system is justified by measuring the bit error rate of system against the optical system parameters. The BER is affected by varying the numbers of subscriber, data rate and power requirement for the system. The BER performance was evaluated with above mentions parameters and systems shows the better performance as compared to reported methods 2D-DPD, 2D-MD and 1D-Non mapping code. The user’s accommodation in system is higher than the 2D-DPD, 2D-MD and 1D-Non mapping code. The suggested system supports the 201% and 146% users as compared to the published methods 2D-DPD and 2D-MD Code at10 -12 BER and similarly the power requirement at optimum BER is very low and system sustainability at high date rate also increases as compare to the existing schemes. The required received power for system is-12.8 dBm at 10 -12 BER, which is lower as compared to the 2D-DPD and 2D-MD Codes. The system performance was determined with variation in weights in spectral and spatial dimension. The outputs observation for hybrid of OFDM with spectral/spatial OCDMA also executed where proposed system outputs effectively improve.