2007•Communications technologyRequires access

Design of Fast Carrier Recover Circuit for High-order QAM

Hongsheng Zhong

Abstract

By the ATC(Automatic Transfer-mode Control) circuit,the initial-stage polarity decision algorithm can fast-lock the frequency,and the weighted DD algorithm can reduce the frequency flicker and finally realize the phase recovery.In the simulation by Matlab,the 64 QAM circuit can acquire up-to 11% frequency offset of the symbol rate and any phase offset in the 5000 symbol periods.

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Available abstract

Key concepts: Computer science, Frequency offset, Offset (computer science), QAM, MATLAB, Carrier recovery, Lock (firearm), Flicker