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首页> 外文会议>Broadband Multimedia Systems and Broadcasting, 2009. BMSB '09 >Coverage gain estimation for multi-burst forward error correction in DVB-H networks
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Coverage gain estimation for multi-burst forward error correction in DVB-H networks

机译：DVB-H网络中多突发前向纠错的覆盖增益估计

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摘要

An approach for increasing the reception robustness of mobile broadcast streaming services has been developed for mobile broadcast systems based on time-slicing, such as DVB-H, employing multi-burst FEC at link or application layer. Multiple bursts will be encoded jointly in order to overcome burst errors caused by signal level variations. The approach shows high potential which can be characterized by a link margin gain due to reduced CNR requirements to cope with fast fading and shadowing. Nevertheless, the achieved gain depends on several system parameters (encoding period and coding rate), the physical environment (correlation of shadowing and multi-path fading) and on the mobility of the users (velocity and trajectory). The paper deals with the coverage estimation and network gain due to multi-burst FEC for vehicular users in a realistic urban scenario. Since the user behavior has to be considered the gain cannot be directly included into the link budget. Thus, a methodology has been developed in order to estimate the coverage of multi-burst FEC services based on dynamic system-level simulations. Results are shown by means of simulations in realistic scenarios and field measurements in urban environments.
机译：对于基于时间分片的移动广播系统，例如DVB-H，已经开发出一种用于增加移动广播流服务的接收鲁棒性的方法，该方法在链路或应用层采用多突发FEC。为了克服由信号电平变化引起的突发错误，将对多个突发进行联合编码。该方法显示出很高的潜力，其特点是由于减少了CNR要求以应对快速的衰落和阴影，因此链路裕量增加。然而，获得的增益取决于几个系统参数（编码周期和编码速率），物理环境（阴影和多径衰落的相关性）以及用户的移动性（速度和轨迹）。本文讨论了在现实的城市场景中，针对车辆用户的多突发FEC引起的覆盖范围估计和网络增益。由于必须考虑用户行为，因此增益不能直接包含在链接预算中。因此，已经开发出一种方法，以便基于动态系统级仿真来估计多突发FEC服务的覆盖范围。通过现实场景中的仿真和城市环境中的现场测量来显示结果。

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