Paper Title
Application of Multicarrier Techniques for 4th Generation Telecommunications Systems
Abstract
The observed trend radio systems lead to the finding of the need for convergence between different wireless
systems. The wireless networks adapt to support ever higher data rates. The radio transmission channel, consisting of
multipath, is very restrictive. A high speed in mono-carrier modulation causes a low symbol duration. The channel time
sprawl causes problems of interference between symbols. In addition, when the channel is frequency selective, the signal
undergoes attenuation which varies with frequency. To overcome these difficulties, multi-carrier modulations have been
introduced. It is frequency multiplexing techniques which modulate the signal to a large number of carriers at once. These
techniques are useful for high-speed transmissions over a multipath and frequency selective channel. On each subcarrier, the
transmission rate is thus low. The inter-frequency space is less than the channel coherence bandwidth.
Keywords - AWGN, BER, OFDM, OFDMA, QAM, Uplink
Author - Sara Riahi, Ali El Hore
Published : Volume-4,Issue-11 ( Nov, 2017 )
DOIONLINE Number - IJAECS-IRAJ-DOIONLINE-10028
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Published on 2018-01-24 |
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