一种适用于高阶QAM的自适应均衡与载波恢复混合算法及硬件实现  

A Joint Algorithm of Adaptive Equalization and Carrier Recovery for High-Order QAM and Its Implementation

作　　者：江舟[1] 刘志[1] 田骏骅[1] 沈泊[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海200433

出　　处：《复旦学报（自然科学版）》2006年第4期437-442,共6页Journal of Fudan University：Natural Science

摘　　要：高阶QAM解调时,由于信道失真以及载波频偏相互影响,自适应均衡与载波恢复需要同时考虑.提出一种自适应均衡与载波恢复混合算法,采用基于CMA和LMS的双模均衡算法以及改进的鉴频、鉴相算法,实现了在较大载波频偏下稳定的均衡收敛;同时该混合算法运算复杂度较低,易于硬件实现.Because of channel distortion and carrier frequency offset, both adaptive equalization and carrier recovery should be taken into account for high-order quadrature amplitude modulation （QAM） demodulation. A joint algorithm of adaptive equalization and carrier recovery is proposed. CMA ＋ LMS dual-mode equalization algorithm and improved frequency and phase detector algorithm are adopted to realize stable equalized convergence for large carrier frequency offset. Due to its low computational complexity, this joint algorithm would be implemented at low hardware rest.

关 键 词：数字电视广播 高阶QAM 自适应均衡 载波恢复 

分 类 号：TN913.8[电子电信—通信与信息系统]