摘要
采用 (2 ,1 ,3 )卷积码结合一种新的交织方案 :位交织方案作为抗干扰措施 ,模拟并讨论了标准灰度图像的数据在相同调制方式、不同车速的移动衰落信道中的抗干扰问题 ,且与周期交织方案的结果做了比较 .模拟结果表明 :卷积码更适合于快车速环境中图像数据的传输 .周期交织方案不适合于卷积码 ,而采用位交织方案的 (2 ,1 ,3 )卷积码可明显改善图像质量 ,大大提高了快衰落移动信道环境中图像通信系统的可靠性 .
The (2,1,3) convolutional code combined with a novel interleaving scheme which is bit interleaving scheme is adopted as the anti interference measure.The error correcting performance of a standard image transmitted through two mobile channels which have same modulation style and two different vehicle speeds is studied and compared with traditional periodic interleaving scheme.Simulation results show that convolutional code is more suitable to fast vehicle speed channel in image transmission system.Periodic interleaving scheme is not suitable to convolutional code.The reliability of image transmission system in fast fading mobile channels can be improved greatly by adopting(2,1,3) convolutional code combined with bit interleaving scheme as the anti interference measure.
出处
《山东大学学报（自然科学版）》
CSCD
2000年第3期297-304,共8页
Journal of Shandong University(Natural Science Edition)
基金
国家自然科学基金资助项目(69872020)
东南大学移动通信国家重点实验室开放基金资助项目(W99001)
东南大学移动通信国家重点实验室访向学者基金资助项目(V-99004).
关键词
移动衰落信道
图像通信
卷积码
位交织
mobile fading channel
image communication
convolutional code
bit interleaving scheme
