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A New Carrier Acquisition Approach Based on DFLL
Author(s): 
Pages: 12-15
Year: Issue:  11
Journal: VIDEO ENGINEERING

Keyword:  载波捕获数字锁频环地面数字电视广播;
Abstract: 介绍了一种利用对称功率谱、基于DFLL改进结构的载波捕获新方法.该方法利用传送信号频谱带内平坦、功率对称的特性,根据上下边带功率差进行鉴频,改变了单纯依赖导频的传统捕获方式,在遇到恶劣信道导频受损的情况下仍然有着优越的捕获能力,并且这种方式对调制模式并不敏感,因此可以广泛应用在各类数字通信系统中,特别是地面数字电视广播传输系统.
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