Joint Carrier Frequency and Sampling Offset Estimation

The patent combines the estimation of carrier frequency offset and sampling period offset into a single joint estimation process. By merging these two separate estimation tasks into one unified procedure using phase differences from cyclic prefix and pilot signals, the system achieves improved accuracy while managing complexity through integrated processing rather than separate independent estimations.

The patent introduces phase difference calculations as an intermediary mechanism to enable joint estimation. By computing phase differences between cyclic prefix samples and pilot signals, the system creates a mediator that captures information about both offsets simultaneously, allowing accurate estimation without requiring complex direct measurement of each offset separately.

The patent segments the joint estimation process into distinct phases: first calculating phase differences from cyclic prefix samples, then calculating phase differences from pilot signals, and finally combining these to estimate both offsets. This segmentation breaks down the computationally intensive joint estimation into manageable steps, reducing the immediate computational power requirement while maintaining accuracy.

The patent performs preliminary calculations of phase differences from cyclic prefix and pilot signals before conducting the actual offset estimation. By pre-computing these phase differences and storing them for later use in the joint estimation equations, the system reduces the computational burden during the main estimation process, thereby lowering real-time power requirements.