星上DVB-S2载波快速搜索技术

Quick searching technology for satellite DVB-S/S2 carriers

摘要:

分析数字视频广播(DVB)-S2相对DVB-S的新特性和发展现状，提出一种基于TDQR- C005F的DVB-S/S2载波信号接收参数的搜索方案。重点针对宽带信号载波的中心频率和带宽参数的搜索技术，以及信号频道的符码率、编码码率和导频参数的三级搜索技术进行分析研究。与传统算法相比，算法和系统快速有效地解决了对DVB-S/S2突发信号的检测识别。实验表明，除对极少带宽小于2 MHz的DVB信号难以锁定外，系统对其他常规DVB-S/S2信号实现了准确锁定，识别搜索率达到97.5%。

Abstract:

New features and development status of Digital Video Broadcasting(DVB)-S2 are analyzed compared to DVB-S. This paper proposes a novel search program of the DVB-S2 signal reception parameters based on TDQR-C005F, focusing on the search technologies of carrier center frequency and bandwidth parameters about the broadband signals，and three-step search technology and implementation of the algorithm concerning parameters of the signal channel including symbol rate，coding rate and pilot frequency. The algorithms and systems can meet the detection and identification requirements of the DVB-S2 burst signal compared to traditional algorithms. Experiments show that，the system can lock those conventional DVB-S/S2 signals accurately except for DVB signals whose bandwidth is below 2 MHz，reaching the search rate of 97.5%.