Cfo Estimation and Subcarrier Interference Cancellation for Multiuser Uplink

Carrier frequency offset (CFO) estimation in uplink of OFDM is a challenging task because each user will experiences different CFO. In this we are estimating the CFO by using different types of estimators. Here we are considering Fusco’s estimator & proposed estimator, in Fusco’s estimator we transmit the signal only in serial form and used both real & imaginary so to reduce the complexity in estimating CFO we go for the technique called proposed estimator. The Fusco’s estimator is a timedomain estimator which gives output as mixed signal, where as the proposed estimator the signal is in frequencydomain which output signal is separated and also it shows that it has low-complexity. We compare the both the simulators in terms of BER (Bit Error Rate) & MSE (Mean Square Error). By comparing both the estimators the proposed estimator will give best performance than the fusco’s estimators. Computer simulation all so shows that the proposed estimator will give better performance than the fusco’s estimator for the Uplink.