arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0901.1892cs.ITmath.IT
收藏

无噪声反馈离散无记忆多址信道的一个新的可调速率域

A New Achievable Rate Region for the Discrete Memoryless Multiple-Access Channel with Noiseless Feedback

Ramji Venkataramanan, S. Sandeep Pradhan

摘要:

针对两用户离散无记忆多址信道,提出了一种新的单信可达速率域。该区域包含Cover-Leung率区域[1],并证明了该包含是严格的.证明使用块马尔可夫叠加策略的基础上的观察,这两个用户的消息是相关的反馈。对于每个编码器来说,传输速率太高,无法直接使用反馈来解码另一个的消息,因此它们在下一个块中传输相关信息以了解彼此的消息。然后,它们在接下来的块中合作以解决解码器的残余不确定性。该编码方案可以被看作是Cover-Leung方案的自然推广,具有一个额外块的延迟和一对额外的辅助随机变量。我们计算建议的速率区域为两个不同的MAC和比较结果与其他已知的速率区域的MAC反馈。最后,我们展示了如何可以扩展的编码方案,以获得更大的速率区域与更多的辅助随机变量。

英文摘要:

A new single-letter achievable rate region is proposed for the two-user discrete memoryless multiple-access channel(MAC) with noiseless feedback. The proposed region includes the Cover-Leung rate region [1], and it is shown that the inclusion is strict. The proof uses a block-Markov superposition strategy based on the observation that the messages of the two users are correlated given the feedback. The rates of transmission are too high for each encoder to decode the other's message directly using the feedback, so they transmit correlated information in the next block to learn the message of one another. They then cooperate in the following block to resolve the residual uncertainty of the decoder. The coding scheme may be viewed as a natural generalization of the Cover-Leung scheme with a delay of one extra block and a pair of additional auxiliary random variables. We compute the proposed rate region for two different MACs and compare the results with other known rate regions for the MAC with feedback. Finally, we show how the coding scheme can be extended to obtain larger rate regions with more auxiliary random variables.

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。

↑