摘要：

针对无线视频传输系统中数据帧长度变化较大、信源数据速率不断变动的特点，提出一种基于中继的低延时协作视频传输系统。给出传输延时的表达式，分析协作中继系统降低传输延时的原因。设计系统的中继策略和调制编码方案，以提高系统的传输质量。仿真结果表明，该传输系统可以有效地降低视频传输的延时，并获得误码率性能增益。

关键词: 中继, 协作通信, 视频传输, 信噪比, 低延时, 误码率

Abstract:

In wireless video transmission system, the length of the frame changes and the source bit rate varies during the transmission. To reduce the system delay, this paper proposes a low delay wireless cooperative video transmission system with relays. The system delay is formulated and the reason of the delay reduction is analyzed. To improve the quality of the video transmission, a relay strategy and modulation and coding scheme are introduced for the system. The simulation results demonstrate that the transmission system can effectively reduce the video transmission delay and the Bit Error Rate(BER).

Key words: relay, cooperative communication, video transmission, Signal to Noise Ratio(SNR), low delay, Bit Error Rate(BER)

中图分类号: 

• TN919.85