摘要
介绍了DVB-T基于导频的信道估计算法与国标基于PN序列的迭代相关检测信道估计算法,对其进行了估计精度、均衡后的误码率性能、运算量、信道估计对冗余开销的影响等方面的比较,并理论推导出DVB-T基于导频的信道估计方法加入虚拟载波后导致的误差,最后得出国标信道估计具备令人满意性能的结论。
In this paper, two channel estimation algorithms respectively based on pilot frequency in DVB-T system and PN turbo correlation detection in Chinese DTFB system are introduced. The two algorithms are compared by several aspects of estimation precision, error rate performance after equalization, operation quantity and the influence of system redundancy for channel estimation. The error due to adding virtual carriers in the channel estimation algorithm based on pilot frequency in DVB-T system is deduced theoretically. In conclusion, channel estimation algorithm in Chinese DTTB system can provide satisfactory performance.
出处
《电视技术》
北大核心
2010年第7期20-22,37,共4页
Video Engineering
基金
福建省自然科学基金项目(2009J05144)
