【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.更多还原

【Abstract】 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 cost.更多还原