摘要
给出了一种适合高阶256QAM的全数字QAM解调方案,提出自适应改变环路带宽的极性判决载波恢复算法以及基于CMA算法和SGA算法的盲均衡算法,并且结合内插滤波器对整个解调系统进行了优化。算法用FPGA实现并成功应用到高阶QAM接收机中。
An all-digital high-order QAM demodulator scheme is presented. We propose a polarity decision carrier recovery algorithm with an adaptive loop bandwidth. A blind equalization algorithm based on Constant Modulus Algorithm （CMA） and Stop-and-Go Algorithm （SGA） is also presented. The algorithms are realized by FPGA and applied to a high-order QAM receiver successfully.
出处
《电路与系统学报》
CSCD
北大核心
2007年第6期124-129,共6页
Journal of Circuits and Systems
基金
国家自然科学基金资助项目(60496316)
关键词
QAM
定时恢复
均衡
载波恢复
QAM
timing recovery
blind equalization
carrier recovery
