A Comprehensive Review: Techniques of CFO Estimation and Mitigation in OFDM

摘要

Increasing demand in high data rate applications find key interest in a multicarrier transmission technique termed orthogonal frequency division multiplexing (OFDM). The progress in the generation of wireless communication reaches the 4th generation which imparts the benefits of OFDM. The enhancement in the utility of the bandwidth in an efficient way is made successful by means of OFDM. Besides, being a promising candidate for multipath delay spread, this kind of multiplexing are sensitive to carrier frequency offsets (CFO). A historical perspective of CFO is presented and the effects of frequency synchronization errors are reviewed. A comprehensive review on the range of solutions proposed for estimation and compensation of CFO are discussed. In addition, the future research directions are forecasted.