| 数字电视国标系统DTMB工作模式盲检测 |
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| 引用本文： | 雷伟龙,王军.数字电视国标系统DTMB工作模式盲检测[J].电视技术,2007,31(7):40-43. |
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| 作者姓名： | 雷伟龙 王军 |
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| 作者单位： | 清华大学,电子工程系,微波与数字通信国家重点实验室,北京,100084 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 介绍了一种可在较短时间内检测到数字电视国标系统工作模式的方法.该方法利用帧头PN序列和PN序列扩展保护部分的相关特性、循环特性以及OFDM信号部分的周期特性进行判决,可达到很好的检测效果,该方法同时可加入跟踪模块对系统工作模式的突然改变作出反应.还介绍了两种可以在硬件资源和性能上进行折中的检测方法.
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| 关 键 词： | 数字电视国标系统 帧头模式检测 数字电视 |
| 文章编号： | 1002-8692（2007）07-0040-04 |
| 修稿时间： | 2007-05-21 |
The Blind Mode Detection for National Standard Digital Television System DTMB |
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| LEI Wei-long,WANG Jun.The Blind Mode Detection for National Standard Digital Television System DTMB[J].Tv Engineering,2007,31(7):40-43. |
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| Authors: | LEI Wei-long WANG Jun |
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| Affiliation: | State Key Lab on Microwave and Digital Communication Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | In this paper, we propose a method for detecting the transmission mode of DTMB within a relatively short time. This method makes use of PN sequence, the correlation of the cycle prefix of PN sequence and the periodicity of the OFDM signal to detect the transmission mode, which has good performance. A tracing module is added to trace the transmission mode, which can change quickly when the transmission is changed. In addition, in this paper, two compromise methods are proposed to make compromise between hardware resource and performance. |
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| Keywords: | national standard digital television system PN mode detection DTV |
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