The transmitter and frequency domain equalization at the SC-FDMA utilizes single carrier modulation at Multiple access technique which can overcome this drawback Sensitivity to frequency synchronization problems, loss ofĮfficiency caused by cyclic prefix/guard interval etc. Other disadvantages like sensitivity to Doppler shift, Peak-to-average power ratio (PAPR).Also it has to face some Several advantages, it has also a major disadvantage of high Selective fading, it is resilient to interference, it makesĮfficient use of the spectrum, resilient to ISI and narrow-bandĮffects and much simpler channel equalization. OFDM providesĪ large number of advantages such as its immunity to
(DAB), digital video broadcasting (DVB), internet Various applications such as digital audio broadcasting It hasĮvolved as a popular access technique which is being used in OFDM technique was first developed inġ960s and nowadays OFDM is been in use for theĬommunications devices that requires high data rate. Yet and OFDM combined with MIMO system has gained Techniques have been proposed to solve these problems till Produce a reliable and efficient communication. Parameters like BER, data rate, bandwidth etc are required to In modern wireless communication systems, some Index Terms- BER, OFDM, PAPR, SC-FDMA, WiMAX. OFDM and SC-FDMA and implemented it in GUI MATLAB 7.10.0 alongwith the coding algorithm of space-time block codes (STBC) by using different modulation techniques i.e. In this paper, we have explored both the multiple access techniques i.e. OFDM is used in the WiMAX uplink but LTE continued to use SC-FDMA.SC-FDMA is a new hybrid modulation scheme that cleverly combines the low PAPR of single-carrier systems with the multipath resistance and flexible subcarrier frequency allocation offered by OFDM. The undesirable high PAPR of OFDM led 3GPP to choose a different modulation format for the LTE uplink. OFDM is a well known technique for the broadband wireless communication system which is utilized for achieving high spectral efficiency in communication systems. Orthogonal Frequency Division Multiplexing (OFDM) and Single Carrier Frequency Division Multiple Access (SC-FDMA) are a major part of future mobile communication standards like Long Term Evolution (LTE), LTE-Advanced and Ultra Mobile Broadband (UMB). Abstract: Rapidly growing demand of multimedia services and the growth of internet services lead to requirement of high speed communication in current 4G and other wireless communication systems.
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