Design Of Carrier Recovery For QAM Demodulate IC

Digital HDTV (Digital High Definition Television) technology integrates the image compressed encoding technology and the digital communication technology. It has become one of the focuses in the high-tech competitions. DVB is the digital HDTV standard that developed by more than 170 organizations in Europe. It mainly comprises satellite (DVB-S), terrestrial (DVB-T) and cable (DVB-C) digital television systems.This paper focuses on algorithms of carrier recovery used in DVB-C channel receiver system and its structure & VLSI (Very Large Scale Integration) implementation.The first chapter introduces digital HDTV and its development, then focus on the DVB system, especially DVB-C system.The second chapter makes an introduction of DVB-C system and the fundamental theory of QAM modulation & demodulation, also briefly describes the basic principle of PLL.The third chapter discusses some brief kinds of algorithms of carrier recovery. After analyzing their characteristics and differences, it brings forward the algorithm & structure applicable for DVB-C system, followed by performance curve.The fourth chapter gives the total architecture of carrier recovery and the implementation of each sub module.Through the whole process of Verilog coding, RTL simulation, synthesis and verification, the proposed carrier recovery module has been implemented with the Chartered 0.25μm CMOS standard cell technology.