Design of cyclic frequency division non orthogonal multiple access system

Abstract

The rapid capacity requirement and the demand for accessing the newlineresource are enlarged, which brings a great revolution in wireless technology newlineand pay the way for next-generation wireless system. In wireless mobile newlinecommunication, the spectrum is considered precious stuff that must be utilized newlineefficiently. Many multiple access schemes have been considered from 1G to 4G newlineto serve multiple users simultaneously. Frequency, time, code, orthogonal newlinefrequency, and single carrier frequency based multiple access schemes are the newlinedifferent multiple access schemes that we have come across, each having their newlinedistinct feature. Non-Orthogonal Multiple Access (NOMA) is a new multiple newlineaccess scheme designed to provide its service to the next-generation wireless newlinecommunication network. Several researchers have established different NOMA newlinemodels and schemes showing their benefits to the upcoming technology. In such newlinea way, a reliable Cyclic Frequency Division NOMA (CFD-NOMA) system is newlinedesigned in this research to support the next-generation wireless system. newlineThe CFD-NOMA system combines Interleaved Frequency Division newlineMultiple Access (IFDMA) cyclically with NOMA. The primary power newlinedomain NOMA is used for user multiplexing in the CFD-NOMA cluster, and newlinethe powers allocated to the users depend on the channel gain condition of the newlineusers. The distinct channel conditioned users are placed within the cluster, newlineand the channel gain determines the strong and the cell-edge users of the newlinecluster. The clusters are distributed based on IFDMA. The Multi-User (MU) newlinedetection is done at the user terminal. The strong user data is obtained at the newlinestrong user terminal using the Successive Interference Cancellation (SIC), newlinewhere initially, the cell-edge user data is found by hard decision. newline