An optical fast-frequency hopping code division multiple access (OFFH-CDMA) system using Fiber Bragg Grating Array (FBGA) with frequency-overlapping multigroup of prime codes

Code division multiple access (CDMA) utilizes spread spectrum techniques and has been widely deployed in wireless communications. Two major types of spread spectrum multiple access (SSMA) schemes are: i. direct sequence spread spectrum (DSSS) and ii. frequency hopped multiple access (FHMA). The benefits and technical advantages of CDMA could be translated in the optical-CDMA (OCDMA) for faster data throughput and better physical layer security. In this paper prime and one-coincidence frequency hop codes are being analyzed for auto-and-cross correlation properties and applied in an optical fiber Bragg grating array (FBGA) to study multiple access interference (MAI) in an optical fast-frequency hopping code division multiple access (OFFH-CDMA) system. A novel frequency-overlapping multigroup scheme for a passive OFFH-CDMA is being used for high speed code hopping, higher spectral efficiency, and interference reduction. In this paper OFFH-CDMA with frequency-overlapping multigroup scheme using prime code is proposed and the result is compared with the previously reported paper. The BER of the proposed prime code shows better performance with respect to one-coincidence code.