A frequency-offset Estimating Algorithm Using Frame Synchronization Circuits

A novel algorithm using carrier synchronization circuits for the estimation of carrier frequency-offset in high-order QAM modems is proposed.Being different from existing algorithms,it simply uses the frame header information in digital com munication system and costs less resources and less expensive.the simulation results shows that the carrier frequency-offset can be estimated accurately even in the conditions of high order QAM modulation,low SNR and large frequency-offset.It can be used in SDR systems,or embedded in communication ASIC as a IP core.