正交幅度调制(QAM)信号的解调技术与实现

The Technology and implementation of demodulation of QAM signal

QAM调制方式广泛应用于有线和无线传输领域。本文阐述了一个QAM的解调系统并且用芯片实现。该系统涉及下变频模块,A/D模块,码元时钟恢复模块,载波恢复模块和自适应均衡模块,前端纠错模块等。

QAM modulation is widely used in cable and wireless transmission. This paper discusses a QAM demodulation system and an IC implementation is presented. The system includes down-convert module, A/D module, timing and carrier recovery module, equalizer and FEC module.