A New Frequency Pre-estimation Aided Carrier Recovery Algorithm for Multimodal Signal System

Abstract

Multimedia System has been widely developed. This paper proposes a new kind of fast Fourier transformation (FFT) and a carrier recovery loop for accurate fine tracking. This paper uses the FFT carrier frequency offset to pre-estimate it that corrects the big frequency firstly, based on this, it uses the carrier frequency ring circuit to correct the small frequency offset. Comparing with other methods, its estimation is more accurate.