摘要
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。
This paper introduces a new approach based on DFLL structure, which makes use of symmetrical spectrum for carrier acquisition. It is especially efficient in some execrable channels that introduce pilot damage for the recovery of carrier doesn＇t rely on pilot as in the traditional method of carrier synchronization. And because of its insensitivity to modulation mode, it could be widely used in various kinds of digital communication systems, especially in the HDTV broadcasting system.
出处
《电视技术》
北大核心
2005年第11期12-15,共4页
Video Engineering
