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- W2465472599 abstract "The conventional codedivision multipleaccess (CDMA) technique used in third gen- eration system faced serious limitations by channel dispersion, causing inter symbol interference (ISI), and it requires advanced signal processing algorithms to contain it (1). Therefore, multi carrier code division multiplexing (MCCDMA) employing multiple stream of data channel can combat channel dispersion, hence ISI, thereby increasing system capability to accommodate a higher number of users This paper presents simulation for the MC-CDMA system using pseudo noise code as spreading code (PN code) to spread data over channel. In this system instead of applying spreading sequences in the time domain, they are applied in the frequency domain, map- ping a difierent chip of a spreading sequence to an individual OFDM subcarrier. The MC-CDMA system is applied in two channel cases, the flrst one when the used channel is Additive white Gaussian noise (AWGN) channel: the relationship between bit error rate and signal to noise ratio is discussed when the number of the users is increased from 4 to 64 users. Then Rayleigh fading which has four taps with difierent powers is added to the channel and its efiect is simulated. The simulation shows that the fading afiects the characteristics of the system sharply and clearly." @default.
- W2465472599 created "2016-07-22" @default.
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- W2465472599 date "2012-01-01" @default.
- W2465472599 modified "2023-09-27" @default.
- W2465472599 title "Multi-user MC-CDMA Using Pseudo Noise Code for Rayleigh and" @default.
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