摘要
为了补偿数据传输中的动态群时延,提出了一种简单有效的基带自适应的补偿算法。该算法基于一种并行全数字接收机结构,采用梯度下降算法迭代的最小化恒模算法的代价函数,完成对群时延补偿器系数的更新。仿真结果表明,该算法可以对群时延进行有效的自适应补偿,将关闭的眼图成功的打开。
A simple and effective adaptive algorithm was proposed to compensate varying group delay in data transmission employing baseband signal processing. Based on the structure of an all-digital parallel receiver （APRX）, the algorithm utilized the gradient descent （GD） algorithm to iteratively minimize the cost function of constant modulus algorithm （CMA）, and updates the coefficients of group delay compensator. Simulation results show that the group delay can be effectively and adaptively compensated by the proposed algorithm, where the closed eye-diagram is opened successfully.
出处
《通信学报》
EI
CSCD
北大核心
2006年第8期87-92,共6页
Journal on Communications
基金
国家高技术研究发展计划("863"计划)基金资助项目~~
