arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.0751cs.ITmath.IT
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相关高斯远距离信源的分布式信源编码

Distributed Source Coding of Correlated Gaussian Remote Sources

Yasutada Oohama

摘要:

本文研究了$L$相关高斯观测值$Y_i, i=1,2, ..., L$的分布式信源编码系统。设$X_i,i=1,2, ..., L$是$L$相关的高斯随机变量,$N_i,$ $i=1,2,... L$是独立的加性高斯噪声,也与$X_i, i=1,2,..., L$无关。我们考虑这样的情况,其中对于每个$i=1,2,..., L$,$Y_i$是$X_i$的噪声观测,即,$Y_i=X_i+N_i$。在这种编码系统中,率失真区域的确定问题仍然是开放的。在本文中,我们推导出明确的外部和内部边界的率失真区域。我们进一步找到了这两个匹配的显式充分条件。我们还研究了相关系数具有对称性时率失真区域的和率部分,并给出了和率部分的一个新的下界。我们得到一个充分条件,这个下界是紧的。导出的充分条件仅依赖于源和观测值的相关性。

英文摘要:

We consider the distributed source coding system for $L$ correlated Gaussian observations $Y_i, i=1,2, ..., L$. Let $X_i,i=1,2, ..., L$ be $L$ correlated Gaussian random variables and $N_i,$ $i=1,2,... L$ be independent additive Gaussian noises also independent of $X_i, i=1,2,..., L$. We consider the case where for each $i=1,2,..., L$, $Y_i$ is a noisy observation of $X_i$, that is, $Y_i=X_i+N_i$. On this coding system the determination problem of the rate distortion region remains open. In this paper, we derive explicit outer and inner bounds of the rate distortion region. We further find an explicit sufficient condition for those two to match. We also study the sum rate part of the rate distortion region when the correlation has some symmetrical property and derive a new lower bound of the sum rate part. We derive a sufficient condition for this lower bound to be tight. The derived sufficient condition depends only on the correlation property of the sources and their observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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