Predominance performance of Sequential Algorithm (SeQ) code in an optical CDMA networks

This study present a new Sequential Algorithm (SeQ) code structure for Optical Code Division Multiple Access (OCDMA) system with flexible cross-correlation has been proposed. In contrary to the existing codes, this SeQ code provides much better performance in term of Bit Error Rate (BER) and Signal Noise Ratio (SNR) for any number of active users. This newly proposed code can adapt to any variable numbers of users by using tridiagonal code matrix. The result obtained from comparison with existing code, DCS, MDW and Hadamard. Thus, at the typical error rate of optical communication system BER = 10-9 this study illustrate that SeQ code can accommodate 190 numbers of simultaneous users compared with DCS (W = 4), MDW (W = 4) and Hadamard (W = 4). This SeQ code capable to enhance performance BER about 46, 27, 100% in comparison with DCS (W = 4), MDW (W = 4) and Hadamard (W = 4) codes. In addition, SeQ code has revealed that this code can improve OCDMA system due SeQ code has highest SNR of 200 numbers of simultaneous users compared with DCS (W = 4) and MDW (W = 4). Thus, the results obtained in this study as an evidence that SeQ code was truly performed better than existing codes and applicable to enhance OCDMA system network for future generation usage.