A Quick and Accurate Union Carrier Parameter Estimation Algorithm Based on FFT
Chao Gong, Bangning Zhang, Daoxing Guo · Dianzi xuebao · 2010
A new union carrier parameter estimation algorithm based on FFT is proposed for data-aided burst mode carrier recovery.The basic idea is that firstly get a coarse estimation by using the peak of a period gram and then gain an accurate estimation by using a new interpolation formula about the two lines beside the peak.Its accuracy is close to MCRB even in very low SNR.As proved by simulation,it can accurately estimate the carrier parameter with 64 symbols even when SNR is as low as-4dB,its estimation range is about 50% of the symbol rate and it's easy to be implemented by hardware as the analyses of complicity implied.Suitable areas of application include carrier recovery in bust mode digital transmission under low SNR circumstance.