计算机科学 ›› 2016, Vol. 43 ›› Issue (8): 50-54.doi: 10.11896/j.issn.1002-137X.2016.08.010
钱晓捷,王超
QIAN Xiao-jie and WANG Chao
摘要: 在第4代移动通信中,人们更加关注移动宽带网络传输的服务质量(QoS),尤其是多输入多输出(Multiple-Input-Multiple-Output,MIMO)系统下的视频多播方面。提出了一种基于Raptor码的视频多播跨层优化算法,通过Raptor码和其他纠错码的包误差率的对比分析,选择合适的Raptor码率和调解编码方案(MCS)模式进行优化组合,在增大系统吞吐量的同时可以提高信道资源(时隙)利用率。仿真实验表明,该算法在下行链路的吞吐量至少增加了28%,节约了至少18%的信道资源;在SNR=11.5时,BUS序列的客观重建质量(PSNR)的性能增益可达到4dB以上。
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