| DVB-H链路层关键技术 |
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| 引用本文： | 金博,董亚萍. DVB-H链路层关键技术[J]. 现代电子技术, 2006, 29(14): 88-90 |
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| 作者姓名： | 金博 董亚萍 |
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| 作者单位： | 西安电子科技大学,综合业务网国家重点实验室,陕西,西安,710071 |
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| 摘 要： | 新一代的多媒体移动标准DVB H是DVB T在移动接收方面的扩展。针对移动接收的特点,DVB H提出了几项颇受瞩目的新技术,实现了对手机等手持式移动终端接收地面数字广播电视信号的良好支持,包括降低能耗、无缝切换、提高移动环境中的抗干扰能力以及灵活的组网方案等。介绍了DVB H的系统结构,详细讨论了DVB H标准中数据链路层的时间分片(time slicing)和多协议封装前向纠错(MPE FEC)技术,并给出一些实验环境下的定量分析。
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| 关 键 词： | 数字视频广播 时间分片 软切换 多协议封装 前向纠错 多普勒频移 |
| 文章编号： | 1004-373X（2006）14-088-03 |
| 收稿时间： | 2006-04-15 |
| 修稿时间： | 2006-04-15 |
Key Technology of DVB-H |
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| JIN Bo,DONG Yaping. Key Technology of DVB-H[J]. Modern Electronic Technique, 2006, 29(14): 88-90 |
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| Authors: | JIN Bo DONG Yaping |
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| Abstract: | DVBH is a specification for bringing broadcast services to batterypowered handheld receivers,which is based on the earlier standard DVBT.The new extension brings features that make it possible to receive digital video broadcast type services in handheld,mobile terminals,such as power saving operation,seamless handover,improve the tolerance to impulse interference,adding flexibility for the network design.This paper describes the system structure of DVBH,focuses on the key technologies of link layer.A detailed discussion with the main features of timeslicing,Multiprotocol Encapsulation Forward Error Correction(MPEFEC) is also given. |
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| Keywords: | DVB-H time-slicing soft handover MPE-FEC RS-code Doppler frequency shift |
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