| 多径信道下图像的信源信道联合编码调制传输 |
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| 引用本文： | 王哲,张晓林,陈雷. 多径信道下图像的信源信道联合编码调制传输[J]. 北京航空航天大学学报, 2009, 35(11): 1371-1374 |
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| 作者姓名： | 王哲 张晓林 陈雷 |
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| 作者单位： | 北京航空航天大学电子信息工程学院,北京,100191;北京航空航天大学电子信息工程学院,北京,100191;北京航空航天大学电子信息工程学院,北京,100191 |
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| 摘 要： | 针对多径衰落信道提出了一种基于小波变换并结合OFDM(Orthogonal Frequency Division Multiplexing)自适应调制的图像传输方法和信源信道联合带宽功率优化分配算法.给出了编码传输方法结构,对有噪信道下基于小波变换的图像编码传输实现和失真估计问题及多误码率OFDM自适应调制比特功率优化分配问题进行了建模和分析,使得信源量化编码与OFDM调制能够方便地结合起来,并进一步得到了相应的信源信道联合优化带宽功率分配方法.仿真和分析表明,该方法实现了多径信道下图像的信源信道联合编码调制传输,编解码复杂度和延迟小,且信源信道联合优化的带宽功率分配可有效提高信道资源利用效率.
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| 关 键 词： | 图像通信 小波变换 正交频分复用 自适应调制 |
| 收稿时间： | 2008-10-23 |
Image transmission over multipath fading channel using joint source channel coding modulation |
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| Wang Zhe,Zhang Xiaolin,Chen Lei. Image transmission over multipath fading channel using joint source channel coding modulation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(11): 1371-1374 |
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| Authors: | Wang Zhe Zhang Xiaolin Chen Lei |
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| Affiliation: | School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | For multipath fading channel,an image transmission method which combines wavelet transform and orthogonal frequency division multiplexing(OFDM) adaptive modulation was proposed,and the algorithm for joint source channel optimal allocation of channel bandwidth and power was presented as well.Following the presentation of system structure,the problems such as the implementation and distortion estimation of image transmission based on wavelet transform over noisy channel,and optimal bit-power allocation for mu... |
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| Keywords: | image communication systems wavelet transforms orthogonal frequency division multiplexing adaptive modulation |
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