An enhanced code structure for spectral amplitude coding in optical code division multiple access systems based on double weight (DW) code families is proposed. Enhanced double weight (EDW) codes possess ideal cross-correlation properties such as maximum cross correlation of 1 and a weight that can be any odd number greater than 1. It has been observed through theoretical analysis and experimental simulation that EDW codes perform significantly better than Hadamard and modified frequency-hopping (MFH) codes. In this study, point-to-point transmission with three EDW-encoded channels was tested at the bit rate of 10 Gbit/s per channel.
A new code structure for spectral amplitude coding optical code division multiple access system based on Double Weight (DW) code families is proposed. The DW has a fixed weight of two. Enhancement Double Weight (EDW) possesses ideal cross-correlation properties and weight can be any odd number which is grater than one. It has been observed that theoretical analysis for EDW code is much better performance compared to Hadamard, and Modified Frequency Hopping (MFH) codes.