Bit-loading for unequal error protection of video streams in OFDM wireless systems

被引：0
|
作者：
Dardari, D [1 ]
Martini, MG [1 ]
Mazzotti, M [1 ]
Chiani, M [1 ]
机构：
[1] Univ Bologna, DEIS, CNIT, IEIIT BO,CNR, I-40136 Bologna, Italy
来源：
2004 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-7 | 2004年
关键词：
D O I：
10.1109/ICC.2004.1313097
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Future wireless video transmission systems will consider OFDM (Orthogonal Frequency Division Multiplexing) as basic modulation technique due to its robustness and low complexity implementation in the presence of frequency selective channels. Recently, adaptive bit loading techniques have been applied to OFDM showing good performance gains in cable transmission systems. In this paper adaptive loading techniques are applied to a OFDM wireless system in the 5GHz band for efficient layered multimedia traffic transmission. A low complexity scheme is introduced and compared with other solutions to realize unequal error protection both at coding and modulation level. The large impact of this technique in terms of video quality is evaluated for MPEG-4 video transmission.
引用
收藏
页码：3076 / 3080
页数：5
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