数字卫星电视接收中的频偏补偿  

Correction of Spectrum Drift in Digital Satellite TV Receiving

作　　者：王宏远[1] 杨风光[1] 

机构地区：[1]华中科技大学电信系,湖北武汉430074

出　　处：《电视技术》2005年第2期64-66,共3页Video Engineering

摘　　要：针对由馈源和通道切换开关组成的下行链路引起的频道搜索速度慢和不准确的问题提出了解决方法,首先分析了由下行链路引起卫星电视信号频谱偏移的原因及特点,然后以LG公司的DVB-S高频头TDQB-S001F为例介绍了软件上弥补这种偏移,以加快频道搜索速度、提高准确性的方法。The idea and solution for the slow speed and inaccuracy of channel switching due to the down-link consisting of the feeder and channel switch is presented. Based on the analysis of the reason and significance of the spectrum drift due to the down-link, a methodology of improving the speed and accuracy of channel switching by software which corrects the drift is proposed. DVB-S high-frequency head TDQB-S001F produced by LG company is taken as an example.

关 键 词：馈源频偏 Stv0299芯片 SL1925E芯片 DVB—S标准 

分 类 号：TN948.61[电子电信—信号与信息处理]