Frequency offset estimation is one of the major modules of the receiving end in a Frequency Division Duplex-Long Term Evolution（FDD-LTE） system.This paper introduces the generation principle of the uplink channel demodulation reference signals and the way of their time-frequency location mapping.On the basis of the hardware performance estimation

it presents an implementation scheme for the Physical Uplink Shared Channel（PUSCH） frequency estimation by using the pilot-frequency-based residual frequency offset estimation algorithm.The analysis of the complexity of its implementation and the fixed-point computation errors shows that this scheme has fairly good performance and can satisfy the requirements of real-time processing.