Unequal Power Allocation for JPEG Transmission Over MIMO Systems
Unequal Power Allocation for JPEG Transmission Over MIMO Systems
复制标题
MIMO 系统上 JPEG 传输的不平等功率分配
DOI：
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发表时间：
2010
影响因子：
10.6
通讯作者：
R. Heath
中科院分区：
文献类型：
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作者：
M. F. Sabir;A. Bovik;R. Heath
随着下一代无线系统中多个发射和接收天线的引入，实时图像和视频通信预计将变得相当普遍，因为随着数据可靠性的提高，非常高的数据速率将变得可用。预计将开发新的联合传输和编码方案，以探索与源统计相匹配的多天线系统的优势。基于这一思想，我们提出了一种在采用空间复用的多输入多输出系统中传输JPEG压缩图像的不等功率分配方案。JPEG压缩图像被分成不同的质量层，不同的发射天线使用不同的发射功率同时传输不同的层，并限制在任意符号周期内的总发射功率。结果表明，与不同的等功率分配方案相比，本文提出的非等功率分配方案能显著提高图像质量，在低信噪比时，峰值信噪比增益可达14d B。
With the introduction of multiple transmit and receive antennas in next generation wireless systems, real-time image and video communication are expected to become quite common, since very high data rates will become available along with improved data reliability. New joint transmission and coding schemes that explore advantages of multiple antenna systems matched with source statistics are expected to be developed. Based on this idea, we present an unequal power allocation scheme for transmission of JPEG compressed images over multiple-input multiple-output systems employing spatial multiplexing. The JPEG-compressed image is divided into different quality layers, and different layers are transmitted simultaneously from different transmit antennas using unequal transmit power, with a constraint on the total transmit power during any symbol period. Results show that our unequal power allocation scheme provides significant image quality improvement as compared to different equal power allocations schemes, with the peak-signal-to-noise-ratio gain as high as 14 dB at low signal-to-noise-ratios.
影响因子：
5.4
作者：
W. B. Pennebaker;Joan L. Mitchell
通讯作者：
W. B. Pennebaker;Joan L. Mitchell