Performance analysis of OFDMA receiver with common carrier frequency offset (CCFO)

Orthogonal frequency division multiplexing (OFDM) is a popular technique used to mitigate the multipath effects and to achieve better data rate in wireless transmission. These OFDM systems become more beneficial when they are extended to enable multiple access wireless multimedia communication. In this paper the effect of carrier frequency offset (CFO) on the OFDM systems and OFDM multiple access (OFDMA) systems are discussed. The performance of the OFDM systems degrades with frequency offset and phase offset. The OFDM multiple access (OFDMA) technology allots groups of the OFDM subcarriers allocated to different users for transmission. The interference effects of the individual subcarriers with the neighboring subcarriers termed as Multiuser Interference (MUI) which also contributes to the system degradation is also analyzed.